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  1. SP Newsprint

    SciTech Connect (OSTI)

    2009-11-01

    This is a combined heat and power (CHP) project profile on a 45 MW steam turbine at SP Newsprint in Dublin, Georgia.

  2. Extensible Argonne SP Scheduling System

    Energy Science and Technology Software Center (OSTI)

    1996-01-24

    The Argonne SP Scheduler provides deterministic queuing of jobs for exclusive access to the SP nodes for either batch or interactive use.

  3. ARM - Instrument - sp2

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    govInstrumentssp2 Documentation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Instrument : Single Particle Soot Photometer (SP2) Instrument Categories Aerosols The SP2 measures the soot (black carbon) mass of individual aerosol particles by laser-induced incandescence down to concentrations as low as 10 ng/m^3. The SP2 is part of the Aerosol Observing System (AOS). See Also Contact(s) Stephen Springston Brookhaven

  4. Enel Green Power SpA formerly Erga SpA | Open Energy Information

    Open Energy Info (EERE)

    SpA formerly Erga SpA Jump to: navigation, search Name: Enel Green Power SpA (formerly Erga SpA) Place: Pisa, Italy Zip: 56122 Sector: Geothermal energy, Hydro, Renewable Energy,...

  5. Solarcell SpA | Open Energy Information

    Open Energy Info (EERE)

    SpA Jump to: navigation, search Name: Solarcell SpA Place: Brugherio, Italy Product: Italian manufacturer of PV cells. References: Solarcell SpA1 This article is a stub. You...

  6. Cyanobacterium sp. for production of compounds

    DOE Patents [OSTI]

    Piven, Irina; Friedrich, Alexandra; Duhring, Ulf; Uliczka, Frank; Baier, Kerstin; Inaba, Masami; Shi, Tuo; Wang, Kui; Enke, Heike; Kramer, Dan

    2015-10-13

    A genetically enhanced cyanobacterial host cell, Cyanobacterium sp. ABICyano1, is disclosed. The enhanced Cyanobacterium sp. ABICyano1 produces a compound or compounds of interest.

  7. Innova SpA | Open Energy Information

    Open Energy Info (EERE)

    to: navigation, search Name: Innova SpA Place: Italy Sector: Services Product: General Financial & Legal Services ( Private family-controlled ) References: Innova SpA1 This...

  8. ARM - Campaign Instrument - sp2

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    would love to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : Single Particle Soot Photometer (SP2) Instrument Categories Aerosols...

  9. Argonne's SpEC Module

    SciTech Connect (OSTI)

    Harper, Jason

    2014-05-05

    Jason Harper, an electrical engineer in Argonne National Laboratory's EV-Smart Grid Interoperability Center, discusses his SpEC Module invention that will enable fast charging of electric vehicles in under 15 minutes. The module has been licensed to BTCPower.

  10. Argonne's SpEC Module

    ScienceCinema (OSTI)

    Harper, Jason

    2014-06-05

    Jason Harper, an electrical engineer in Argonne National Laboratory's EV-Smart Grid Interoperability Center, discusses his SpEC Module invention that will enable fast charging of electric vehicles in under 15 minutes. The module has been licensed to BTCPower.

  11. Metalco SpA | Open Energy Information

    Open Energy Info (EERE)

    Metalco SpA Jump to: navigation, search Name: Metalco SpA Place: Italy Product: Italy-based active metal construction company offering solutions for PV applications. References:...

  12. Almeco SpA | Open Energy Information

    Open Energy Info (EERE)

    Almeco SpA Jump to: navigation, search Name: Almeco SpA Place: Milan, Italy Zip: 20098 Product: Milan-based lighting company. Manufactures daylight saving systems and light pipes...

  13. Fortesa SpA | Open Energy Information

    Open Energy Info (EERE)

    Fortesa SpA Place: Italy Sector: Solar Product: Italy-based developer of PV solar plants. References: Fortesa SpA1 This article is a stub. You can help OpenEI by expanding...

  14. Enia SpA | Open Energy Information

    Open Energy Info (EERE)

    SpA Jump to: navigation, search Name: Enia SpA Place: Parma, Italy Zip: 43100 Product: Italian utility company. Coordinates: 44.79864, 10.339925 Show Map Loading map......

  15. Argonne's SpEC Module | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SpEC Module Share Topic Energy Energy efficiency Vehicles

  16. Enel SpA | Open Energy Information

    Open Energy Info (EERE)

    Enel SpA Place: Roma, Italy Zip: 198 Sector: Renewable Energy Product: Rome-based electricity distributor and generator, also supplies gas and is active in telecommunications....

  17. SP Energy Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Energy Co Ltd Jump to: navigation, search Name: SP Energy Co Ltd Place: Moongyeong, North Gyeongsang, Korea (Republic) Product: Korea-based project developer involved with building...

  18. Solar Utility SpA | Open Energy Information

    Open Energy Info (EERE)

    Utility SpA Jump to: navigation, search Name: Solar Utility SpA Place: Italy Sector: Solar Product: Italy-based solar PV project developer. References: Solar Utility SpA1 This...

  19. SunTergrid SpA | Open Energy Information

    Open Energy Info (EERE)

    SunTergrid SpA Jump to: navigation, search Name: SunTergrid SpA Place: Roma, Italy Sector: Solar Product: Italy-based solar project developer and subsidiary of Terna SpA....

  20. Compagnia Italiana Energia SpA CIE | Open Energy Information

    Open Energy Info (EERE)

    Compagnia Italiana Energia SpA CIE Jump to: navigation, search Name: Compagnia Italiana Energia SpA (CIE) Place: Torino, Italy Zip: 10143 Sector: Renewable Energy Product:...

  1. Enel Produzione SpA | Open Energy Information

    Open Energy Info (EERE)

    Produzione SpA Jump to: navigation, search Name: Enel Produzione SpA Place: Roma, Italy Zip: 198 Sector: Biomass, Geothermal energy, Hydro, Services, Wind energy Product:...

  2. Edison SpA | Open Energy Information

    Open Energy Info (EERE)

    SpA Place: Milan, Italy Zip: 20121 Sector: Hydro, Wind energy Product: Independent power producer with approximately 9,300MW of hydro, fossil fuel and wind generation assets....

  3. HERA SpA | Open Energy Information

    Open Energy Info (EERE)

    HERA SpA Place: Bologna, Italy Zip: 40127 Sector: Services Product: Hera is a large Italian multiple-service group, born as the result of the first significant aggregation of...

  4. ARM - Campaign Instrument - sp2-air

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    -air Comments? We would love to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : Single Particle Soot Photometer - Airborne (SP2-AIR)...

  5. Pramac SpA | Open Energy Information

    Open Energy Info (EERE)

    Italy Zip: 53031 Product: Pramac is predominately a manufacturer of handling systems and power systems, entered the PV industry in December 2007. References: Pramac SpA1 This...

  6. AHSS Stamping Project … A/SP 050; Nonlinear Strain Paths Project … A/SP

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    061 | Department of Energy AHSS Stamping Project … A/SP 050; Nonlinear Strain Paths Project … A/SP 061 AHSS Stamping Project … A/SP 050; Nonlinear Strain Paths Project … A/SP 061 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation PDF icon lm041_xia_2011_o.pdf More Documents & Publications Nonlinear Strain Paths Advanced High-Strength Steel Stamping Characterization of Thermo-Mechanical Behaviors of Advanced High Strength

  7. TerniEnergia SpA | Open Energy Information

    Open Energy Info (EERE)

    TerniEnergia SpA Jump to: navigation, search Name: TerniEnergia SpA Place: Terni, Italy Zip: 5100 Sector: Renewable Energy Product: Italy-based developer of renewable energy...

  8. Fintel Energy Group SpA | Open Energy Information

    Open Energy Info (EERE)

    Fintel Energy Group SpA Jump to: navigation, search Name: Fintel Energy Group SpA Place: Pollenza, Italy Zip: 62010 Sector: Renewable Energy Product: Italy-based energy operator...

  9. Microsoft Word - FY 2015 SP Performance Appraisal System Guidance - Final

    Office of Environmental Management (EM)

    Office of Executive Resources Office of the Chief Human Capital Officer U.S. Department of Energy FY 2015 Senior Professional (SP) Performance Appraisal System Opening Guidance 2 Table of Contents Contents I. SP PERFORMANCE APPRAISAL TEMPLATE and TIMELINE ....................................................................... 3 II. PERFORMANCE PLAN - CRITICAL ELEMENTS .......................................................................................... 3 III. SP SUMMARY RATING LEVEL

  10. ARM - Campaign Instrument - sp-ams

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    govInstrumentssp-ams Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : Soot particle aerosol mass spectrometer (SP-AMS) Instrument Categories Aerosols Primary Measurements Taken The following measurements are those considered scientifically relevant. Refer to the datastream (netcdf) file headers for the list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Black carbon

  11. Multiple Mechanisms of Uranium Immobilization by Cellulomonas sp. Strain

    Office of Scientific and Technical Information (OSTI)

    ES6 (Journal Article) | SciTech Connect Journal Article: Multiple Mechanisms of Uranium Immobilization by Cellulomonas sp. Strain ES6 Citation Details In-Document Search Title: Multiple Mechanisms of Uranium Immobilization by Cellulomonas sp. Strain ES6 Removal of hexavalent uranium (U(VI)) from aqueous solution was studied using a Gram-positive facultative anaerobe, Cellulomonas sp. strain ES6, under anaerobic, non-growth conditions in bicarbonate and PIPES buffers. Inorganic phosphate was

  12. FY 2014 Senior Executive Service (SES) and Senior Professional (SP)

    Energy Savers [EERE]

    Performance Appraisal Cycle - Closeout Guidance | Department of Energy Senior Executive Service (SES) and Senior Professional (SP) Performance Appraisal Cycle - Closeout Guidance FY 2014 Senior Executive Service (SES) and Senior Professional (SP) Performance Appraisal Cycle - Closeout Guidance The FY 2014 performance appraisal cycle for both SES and SP members, which includes Senior Level (SL) and Scientific or Professional (ST) employees, concludes on September 30, 2014. In order to prepare

  13. Preliminary SP-100/Stirling heat exchanger designs

    SciTech Connect (OSTI)

    Schmitz, P.; Tower, L.; Dawson, R.; Blue, B.; Dunn, P.

    1994-09-01

    Analytic modeling of several heat exchanger concepts to couple the SP-100 nuclear reactor lithium loop and the Space Stirling Power Convertor (SSPC) was performed. Four 25 kWe SSPC`s are used to produce the required 100 kW of electrical power. This design work focused on the interface between a single SSPC and the primary lithium loop. Manifolding to separate and collect the four channel flow was not modeled. This work modeled two separate types of heat exchanger interfaces (conductive coupling and radiative coupling) to explore their relative advantages and disadvantages. The minimum mass design of the conductively coupled concepts was 18 kg or 0.73 kg/kWe for a single 25 kWe convertor. The minimum mass radiatively coupled concept was 41 kg or 1.64 kg/kWe. The direct conduction heat exchanger provides a lighter weight system because of its ability to operate the Stirling convertor evaporator at higher heat fluxes than those attainable by the radiatively coupled systems. Additionally the conductively coupled concepts had relatively small volumes and provide potentially simpler assembly. Their disadvantages were the tight tolerances and material joining problems associated with this refractory to superalloy interface. The advantages of the radiatively coupled designs were the minimal material interface problems.

  14. MX Group SpA | Open Energy Information

    Open Energy Info (EERE)

    SpA Place: Villasanta, Italy Zip: 20058 Product: MX group is a turnkey provider of manufacturing plants for PV and other electronic equipment. Coordinates: 45.606895, 9.3066...

  15. PaSol Italia SpA | Open Energy Information

    Open Energy Info (EERE)

    Name: PaSol Italia SpA Place: Varallo Pombia, Italy Zip: 28040 Sector: Solar Product: PA.SOL was formed by local private investors in order to initiate local PV module...

  16. Shewanella loihica sp. nov., isolated from iron-rich microbial...

    Office of Scientific and Technical Information (OSTI)

    loihica sp. nov., isolated from iron-rich microbial mats in the Pacific Ocean A novel marine bacterial strain, PV-4T, isolated from a microbial mat located at a hydrothermal vent...

  17. Caloramator sp. Tolerance of Pretreatment Inhibitors from Lignocellulosics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - Energy Innovation Portal Caloramator sp. Tolerance of Pretreatment Inhibitors from Lignocellulosics Oak Ridge National Laboratory Contact ORNL About This Technology Technology Marketing SummaryORNL inventors discovered a novel microorganism that displays exceptional tolerance to several growth inhibitors generated during dilute acid pretreatment of lignocellulosic biomass.DescriptionVanillin, furfural, hydroxymethylfurfural and lignin are known to inhibit the growth of microorganisms, such

  18. DOE ARM SP2 Deployment at Boston College_Aerodyne led Coated...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SP2 Deployment at Boston College-Aerodyne- Led Coated Black Carbon Study (BC4) Final ... DOESC-ARM-15-068 SP2 Deployment at Boston College- Aerodyne-Led Coated Black Carbon Study ...

  19. ErgyCapital SpA formerly Greenergy Capital | Open Energy Information

    Open Energy Info (EERE)

    SpA formerly Greenergy Capital Jump to: navigation, search Name: ErgyCapital SpA (formerly Greenergy Capital) Place: Milan, Italy Zip: 20121 Sector: Efficiency, Renewable Energy...

  20. NSS5/SP-STM2 Joint International Conference

    SciTech Connect (OSTI)

    Saw-Wai Hla

    2009-05-03

    The NSS5/SP-STM2 conference was held in Athens, Ohio July 15-19, 2008. The conference brought together a prestigious group of scientists from all over the globe to focus for 3 days on a variety of nanoscience topics, particularly on nanoscale spectroscopy and spin-polarized scanning tunneling microscopy. The conference was attended by many young scientists as well as senior scientists. Attendees to the conference were drawn from more than 10 countries and included 28 invited speakers, who are the leading scientists in their respective research areas. Included among the invited speakers were 4 plenary speakers - eminent scientists in their fields. The conference was divided into two parallel sessions the NSS5 session and the SP-STM2 session.

  1. The transputer based GA. SP data acquisition system

    SciTech Connect (OSTI)

    Colombo, D.; Avano, B.; DePoli, M.; Maron, G. ); Negro, A.; Parlati, G. )

    1992-04-01

    In this paper, the new data acquisition for the GA.SP detector is presented. It is a distributed system based on a network of 40 T800 and T222 transputers linked to a VME system used for histogram storage. A 100 MBit/s FDDI ring connects the system to UNIX workstations used for the experiment control, histogram display and second level data analysis.

  2. FY 2015 Senior Executive Service (SES) and Senior Professional (SP) Performance Appraisal Opening Guidance

    Broader source: Energy.gov [DOE]

    The FY 2015 performance appraisal cycle for both SES and SP members, which includes Senior Level (SL) and Scientific or Professional (ST) employees, concludes on September 30, 2015.

  3. Spectral SP: A New Approach to Mapping Reservoir Flow and Permeability...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Reservoir Flow and Permeability Spectral SP: A New Approach to Mapping Reservoir Flow and Permeability presentation at the April 2013 peer review meeting held in Denver, Colorado. ...

  4. Spectral SP: A New Approach to Mapping Reservoir Flow and Permeability

    Broader source: Energy.gov [DOE]

    Spectral SP: A New Approach to Mapping Reservoir Flow and Permeability presentation at the April 2013 peer review meeting held in Denver, Colorado.

  5. PAH bioconcentration in Mytilus sp from Sinclair Inlet, WA

    SciTech Connect (OSTI)

    Frazier, J.; Young, D.; Ozretich, R.; Echols, S.

    1995-12-31

    Approximately 20 polynuclear aromatic hydrocarbons (PAH) were measured by GC/MS in seawater and whole soft tissues of the intertidal mussel Mytilus sp. collected in July 1991 within and around Puget Sound`s Sinclair Inlet. Low variability was observed in the water concentrations collected over three days at control sites, yielding reliable values for the exposure levels experienced by this bioindicator mollusk. Mean water concentrations of acenaphthene, phenanthrene, and fluoranthene in the control region were 2.7 {+-} 0.8, 2.8 {+-} 0.8, and 3.1 {+-} 0.7 ng/liter, respectively. Levels measured near sites of vessel activity were higher but much more variable; this reduced the reliability of the tissue/water bioconcentration factors (BCF) obtained from these samples. An empirical model relating values of Log BCF and Log Kow for the control zone samples supports the utility of this estuarine bioindicator for monitoring general levels of PAH in nearshore surface waters.

  6. Nuclear facility licensing, documentaion, and reviews, and the SP-100 test site experience

    SciTech Connect (OSTI)

    Cornwell, B.C.; Deobald, T.L.; Bitten, E.J.

    1991-06-01

    The required approvals and permits to test a nuclear facility are extensive. Numerous regulatory requirements result in the preparation of documentation to support the approval process. The principal regulations for the SP-100 Ground Engineering System (GES) include the National Environmental Policy Act, Clean Air Act, and Atomic Energy Act. The documentation prepared for the SP-100 Nuclear Assembly Test (NAT) included an Environmental Assessment, state permit applications, and Safety Analysis Reports. This paper discusses the regulation documentation requirements and the SP-100 NAT Test Site experience. 12 refs., 2 figs., 2 tabs.

  7. Cyanobacterium sp. host cell and vector for production of chemical compounds in cyanobacterial cultures

    DOE Patents [OSTI]

    Piven, Irina; Friedrich, Alexandra; Duhring, Ulf; Uliczka, Frank; Baier, Kerstin; Inaba, Masami; Shi, Tuo; Wang, Kui; Enke, Heike; Kramer, Dan

    2014-09-30

    A cyanobacterial host cell, Cyanobacterium sp., that harbors at least one recombinant gene for the production of a chemical compounds is provided, as well as vectors derived from an endogenous plasmid isolated from the cell.

  8. FY 2016 SENIOR EXECUTIVE SERVICE (SES) AND SENIOR PROFESSIONAL (SP) PERFORMANCE APPRAISAL OPENING GUIDANCE

    Broader source: Energy.gov [DOE]

    FY 2016 performance appraisal cycle for both SES and SP members, which includes Senior Level (SL) and Scientific or Professional (ST) employees, concludes on December 15, 2015. These documents...

  9. FY 2015 SENIOR EXECUTIVE SERVICE (SES) AND SENIOR PROFESSIONAL (SP) PERFORMANCE APPRAISAL CYCLE- CLOSEOUT GUIDANCE

    Broader source: Energy.gov [DOE]

    The FY 2015 performance appraisal cycle for both SES and SP members, which includes Senior Level (SL) and Scientific or Professional (ST) employees, concluded on September 30, 2015.  In order to...

  10. ARM - Field Campaign - SP2 Deployment at Boston College-Aerodyne...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Deployment at Boston College-Aerodyne led Coated Black Carbon Study (BC4) ARM Data ... Campaign : SP2 Deployment at Boston College-Aerodyne led Coated Black Carbon Study (BC4) ...

  11. Energia Servizi Engineering SpA E S Engineering | Open Energy...

    Open Energy Info (EERE)

    SpA (E&S Engineering) Place: Rome, Italy Sector: Hydro, Wind energy Product: Italian developer of biogas, wind, mini-hydro and PV projects. Coordinates: 41.90311,...

  12. Overview of the 1985 NASA Lewis Research Center SP-100 free-piston Stirling engine activities

    SciTech Connect (OSTI)

    Slaby, J.G.

    1985-01-01

    An overview of the 1985 (NASA) Lewis Research Center free-piston Stirling engine activities in support of the SP-100 Program is presented. The SP-100 program is being conducted in support of the Department of Advanced Research Projects Agency (DARPA) and the Department of Energy (DOE), and NASA. This effort is keyed on the design, fabrication, assembly, and testing of a 25 kW(e) Stirling space-power technology-feasibility demonstrator engine. Another facet of the SP-100 project covers the status of a 9000-h goal endurance test conducted on a 2 kW(e) free-piston Stirling/linear alternator system employing hydrostatic gas bearings. Dynamic balancing of the RE-1000 engine (a 1 kW(e) free-piston Stirling engine) using a passive dynamic absorber is discussed, along with the results of a parametric study showing the relationships of Stirling power converter specific weight and efficiency as functions of Stirling engine heater to cooler temperature ratio. Planned tests are described covering a hydrodynamic gas bearing concept for potential SP-100 application.

  13. Genome Sequence of Amycolatopsis sp Strain ATCC 39116, a Plant Biomass-Degrading Actinomycete

    SciTech Connect (OSTI)

    Davis, Jennifer R.; Goodwin, Lynne A.; Woyke, Tanja; Teshima, Hazuki; Bruce, David; Detter, J. Chris; Tapia, Roxanne; Han, Shunsheng; Han, James; Pitluck, Sam; Nolan, Matt; Mikhailova, Natalia; Land, Miriam L; Sello, Jason K.

    2012-01-01

    We announce the availability of a high-quality draft of the genome sequence of Amycolatopsis sp. strain 39116, one of few bacterial species that are known to consume the lignin component of plant biomass. This genome sequence will further ongoing efforts to use microorganisms for the conversion of plant biomass into fuels and high-value chemicals.

  14. Genome Sequence of the Alkaline-Tolerant Cellulomonas sp. Strain FA1

    SciTech Connect (OSTI)

    Cohen, Michael F.; Hu, Ping; Nguyen, My Vu; Kamennaya, Nina; Brown, Natasha; Woyke, Tanja; Kyrpides, Nikos; Holman, Hoi-Ying; Torok, Tamas

    2015-06-18

    We present the genome of the cellulose-degrading Cellulomonas sp. strain FA1 isolated from an actively serpentinizing highly alkaline spring. Knowledge of this genome will enable studies into the molecular basis of plant material degradation in alkaline environments and inform the development of lignocellulose bioprocessing procedures for biofuel production.

  15. Genome Sequence of the Alkaline-Tolerant Cellulomonas sp. Strain FA1

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Cohen, Michael F.; Hu, Ping; Nguyen, My Vu; Kamennaya, Nina; Brown, Natasha; Woyke, Tanja; Kyrpides, Nikos; Holman, Hoi-Ying; Torok, Tamas

    2015-06-18

    We present the genome of the cellulose-degrading Cellulomonas sp. strain FA1 isolated from an actively serpentinizing highly alkaline spring. Knowledge of this genome will enable studies into the molecular basis of plant material degradation in alkaline environments and inform the development of lignocellulose bioprocessing procedures for biofuel production.

  16. ARM - Field Campaign - Colorado: SP2 Deployment at StormVEx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    would love to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Colorado: SP2 Deployment at StormVEx 2010.11.15 - 2011.04.25 Lead Scientist :...

  17. Environmental assessment of SP-100 ground engineering system test site: Hanford Site, Richland, Washington

    SciTech Connect (OSTI)

    Not Available

    1988-12-01

    The US Department of Energy (DOE) proposes to modify an existing reactor containment building (decommissioned Plutonium Recycle Test Reactor (PRTR) 309 Building) to provide ground test capability for the prototype SP-100 reactor. The 309 Building (Figure 1.1) is located in the 300 Area on the Hanford Site in Washington State. The National Environmental Policy Act (NEPA) requires that Federal agencies assess the potential impacts that their actions may have on the environment. This Environmental Assessment describes the consideration given to environmental impacts during reactor concept and test site selection, examines the environmental effects of the DOE proposal to ground test the nuclear subsystem, describes alternatives to the proposed action, and examines radiological risks of potential SP-100 use in space. 73 refs., 19 figs., 7 tabs.

  18. Direct synthesis of sp-bonded carbon chains on graphite surface by femtosecond laser irradiation

    SciTech Connect (OSTI)

    Hu, A.; Rybachuk, M.; Lu, Q.-B.; Duley, W. W.

    2007-09-24

    Microscopic phase transformation from graphite to sp-bonded carbon chains (carbyne) and nanodiamond has been induced by femtosecond laser pulses on graphite surface. UV/surface enhanced Raman scattering spectra and x-ray photoelectron spectra displayed the local synthesis of carbyne in the melt zone while nanocrystalline diamond and trans-polyacetylene chains form in the edge area of gentle ablation. These results evidence possible direct 'writing' of variable chemical bonded carbons by femtosecond laser pulses for carbon-based applications.

  19. Overview of free-piston Stirling SP-100 activities at the NASA Lewis Research Center

    SciTech Connect (OSTI)

    Slaby, J.G.

    1986-01-01

    An overview of the National Aeronautics and Space Administration (NASA) Lewis Research Center (LeRC) SP-100 free-piston Stirling engine activities is presented. These activities are being conducted in support of the Department of Defense (DOD), Department of Energy (DOE), and NASA. The space-power technology effort, under SP-100, addresses the status of the 25 kWe Space Power Demonstrator Engine (SPDE). Another facet of the SP-100 project covers the status of an endurance test. Dynamic balancing of the SPDE engine will be discussed along with a summary covering the parametric results of a study showing the relationship between power-converter specific weight and efficiency both as a function of Stirling engine heater to cooler temperature ratio. Design parameters and conceptual design features will be presented for a 25 kWe, single-cylinder free-piston Stirling space-power converter. And finally, a description of a hydrodynamic gas bearing concept will be presented.

  20. Gas production and behavior in the coolant of the SP-100 Space Nuclear Power System

    SciTech Connect (OSTI)

    McGhee, J.M.

    1989-08-01

    The radiologic generation and subsequent behavior of helium gas in the lithium coolant of SP-100 class space nuclear power reactors was investigated analytically in a two part study. Part One of the study consisted of a calculation of coolant radiologic helium gas production rates in a SP-100 class reactor using the discrete ordinates code TWODANT. Cross sections were developed from ENDF/B-V data via the MATXS6s master cross section library. Cross sections were self shielded assuming one homogeneous core region, and doppler broadened to 1300 K using the cross section preparation code TRANSX. Calculations were performed using an S{sub 4}/P{sub 1} approximation and 80 neutron energy groups. Part Two of the study consisted of a theoretical investigation into the behavior of helium gas in the primary loop of lithium cooled space reactors. The SP-100 space power system was used as a representative of such a system. Topics investigated included: (1) heterogeneous and homogeneous nucleation; (2) bubble growth/collapse by diffusion, mechanical temperature/pressure effects, and coalescence; and, (3) the effects on bubble distribution of microgravity, magnetic fields, and inertially induced buoyancy. 104 refs., 78 figs., 28 tabs.

  1. Elastic properties, sp fraction, and Raman scattering in low and high pressure synthesized diamond-like boron rich carbides

    SciTech Connect (OSTI)

    Zinin, Pavel V.; Burgess, Katherine; Jia, Ruth; Sharma, Shiv; Ming, Li-Chung; Liu, Yongsheng; Ciston, Jim; Hong, Shiming

    2014-10-07

    Dense BC{sub x} phases with high boron concentration are predicted to be metastable, superhard, and conductors or superconductors depending on boron concentration. However, up to this point, diamond-like boron rich carbides BC{sub x} (dl-BC{sub x}) phases have been thought obtainable only through high pressure and high temperature treatment, necessitating small specimen volume. Here, we use electron energy loss spectroscopy combined with transmission electron microscopy, Raman spectroscopy, surface Brillouin scattering, laser ultrasonics (LU) technique, and analysis of elastic properties to demonstrate that low pressure synthesis (chemical vapor deposition) of BC{sub x} phases may also lead to the creation of diamond-like boron rich carbides. The elastic properties of the dl-BC{sub x} phases depend on the carbon spversus sp content, which decreases with increasing boron concentration, while the boron bonds determine the shape of the Raman spectra of the dl-BC{sub x} after high pressure-high temperature treatment. Using the estimation of the density value based on the sp fraction, the shear modulus ? of dl-BC?, containing 10% carbon atoms with sp bonds, and dl-B?C?, containing 38% carbon atoms with sp bonds, were found to be ? = 19.3 GPa and ? = 170 GPa, respectively. The presented experimental data also imply that boron atoms lead to a creation of sp bonds during the deposition processes.

  2. Investigation of refractory black carbon-containing particle morphologies using the single-particle soot photometer (SP2)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Sedlacek, III, Arthur J.; Lewis, Ernie R.; Onasch, Timothy B.; Lambe, Andrew T.; Davidovits, Paul

    2015-07-24

    An important source of uncertainty in radiative forcing by absorbing aerosol particles is the uncertainty in their morphologies (i.e., the location of the absorbing substance on/in the particles). To examine the effects of particle morphology on the response of an individual black carbon-containing particle in a Single-Particle Soot Photometer (SP2), a series of experiments was conducted to investigate black carbon-containing particles of known morphology using Regal black (RB), a proxy for collapsed soot, as the light-absorbing substance. Particles were formed by coagulation of RB with either a solid substance (sodium chloride or ammonium sulfate) or a liquid substance (dioctyl sebacate),more » and by condensation with dioctyl sebacate, the latter experiment forming particles in a core-shell configuration. Each particle type experienced fragmentation (observed as negative lagtimes), and each yielded similar lagtime responses in some instances, confounding attempts to differentiate particle morphology using current SP2 lagtime analysis. SP2 operating conditions, specifically laser power and sample flow rate, which in turn affect the particle heating and dissipation rates, play an important role in the behavior of particles in the SP2, including probability of fragmentation. This behavior also depended on the morphology of the particles and on the thermo-chemical properties of the non-RB substance. Although these influences cannot currently be unambiguously separated, the SP2 analysis may still provide useful information on particle mixing states and black carbon particle sources.« less

  3. Investigation of refractory black carbon-containing particle morphologies using the single-particle soot photometer (SP2)

    SciTech Connect (OSTI)

    Sedlacek, III, Arthur J.; Lewis, Ernie R.; Onasch, Timothy B.; Lambe, Andrew T.; Davidovits, Paul

    2015-07-24

    An important source of uncertainty in radiative forcing by absorbing aerosol particles is the uncertainty in their morphologies (i.e., the location of the absorbing substance on/in the particles). To examine the effects of particle morphology on the response of an individual black carbon-containing particle in a Single-Particle Soot Photometer (SP2), a series of experiments was conducted to investigate black carbon-containing particles of known morphology using Regal black (RB), a proxy for collapsed soot, as the light-absorbing substance. Particles were formed by coagulation of RB with either a solid substance (sodium chloride or ammonium sulfate) or a liquid substance (dioctyl sebacate), and by condensation with dioctyl sebacate, the latter experiment forming particles in a core-shell configuration. Each particle type experienced fragmentation (observed as negative lagtimes), and each yielded similar lagtime responses in some instances, confounding attempts to differentiate particle morphology using current SP2 lagtime analysis. SP2 operating conditions, specifically laser power and sample flow rate, which in turn affect the particle heating and dissipation rates, play an important role in the behavior of particles in the SP2, including probability of fragmentation. This behavior also depended on the morphology of the particles and on the thermo-chemical properties of the non-RB substance. Although these influences cannot currently be unambiguously separated, the SP2 analysis may still provide useful information on particle mixing states and black carbon particle sources.

  4. Genomes of three facultatively symbiotic Frankia sp. strainsreflect host plant biogeography

    SciTech Connect (OSTI)

    Normand, Philippe; Lapierre, Pascal; Tisa, Louis S.; Gogarten, J.Peter; Alloisio, Nicole; Bagnarol, Emilie; Bassi, Carla A.; Berry,Alison; Bickhart, Derek M.; Choisne, Nathalie; Couloux, Arnaud; Cournoyer, Benoit; Cruveiller, Stephane; Daubin, Vincent; Demange, Nadia; Francino, M. Pilar; Ggoltsman, Eugene; Huang, Ying; Kopp, Olga; Labarre,Laurent; Lapidus, Alla; Lavire, Celine; Marechal, Joelle; Martinez,Michele; Mastronunzio, Juliana E.; Mullin, Beth; Niemann, James; Pujic,Pierre; Rawnsley, Tania; Rouy, Zoe; Schenowitz, Chantal; Sellstedt,Anita; Tavares, Fernando; Tomkins, Jeffrey P.; Vallenet, David; Valverde,Claudio; Wall, Luis; Wang, Ying; Medigue, Claudine; Benson, David R.

    2006-02-01

    Filamentous actinobacteria from the genus Frankia anddiverse woody trees and shrubs together form N2-fixing actinorhizal rootnodule symbioses that are a major source of new soil nitrogen in widelydiverse biomes 1. Three major clades of Frankia sp. strains are defined;each clade is associated with a defined subset of plants from among theeight actinorhizal plant families 2,3. The evolution arytrajectoriesfollowed by the ancestors of both symbionts leading to current patternsof symbiont compatibility are unknown. Here we show that the competingprocesses of genome expansion and contraction have operated in differentgroups of Frankia strains in a manner that can be related to thespeciation of the plant hosts and their geographic distribution. Wesequenced and compared the genomes from three Frankia sp. strains havingdifferent host plant specificities. The sizes of their genomes variedfrom 5.38 Mbp for a narrow host range strain (HFPCcI3) to 7.50Mbp for amedium host range strain (ACN14a) to 9.08 Mbp for a broad host rangestrain (EAN1pec.) This size divergence is the largest yet reported forsuch closely related bacteria. Since the order of divergence of thestrains is known, the extent of gene deletion, duplication andacquisition could be estimated and was found to be inconcert with thebiogeographic history of the symbioses. Host plant isolation favoredgenome contraction, whereas host plant diversification favored genomeexpansion. The results support the idea that major genome reductions aswell as expansions can occur in facultatively symbiotic soil bacteria asthey respond to new environments in the context of theirsymbioses.

  5. A reliability and mass perspective of SP-100 Stirling cycle lunar-base powerplant designs

    SciTech Connect (OSTI)

    Bloomfield, H.S.

    1991-06-01

    The purpose was to obtain reliability and mass perspectives on selection of space power system conceptual designs based on SP-100 reactor and Stirling cycle power-generation subsystems. The approach taken was to: (1) develop a criterion for an acceptable overall reliability risk as a function of the expected range of emerging technology subsystem unit reliabilities; (2) conduct reliability and mass analyses for a diverse matrix of 800-kWe lunar-base design configurations employing single and multiple powerplants with both full and partial subsystem redundancy combinations; and (3) derive reliability and mass perspectives on selection of conceptual design configurations that meet an acceptable reliability criterion with the minimum system mass increase relative to reference powerplant design. The developed perspectives provided valuable insight into the considerations required to identify and characterize high-reliability and low-mass lunar-base powerplant conceptual design.

  6. Draft genome sequence of Sulfurospirillum sp. strain MES, reconstructed from the metagenome of a microbial electrosynthesis system

    SciTech Connect (OSTI)

    Ross, Daniel E.; Marshall, Christopher W.; May, Harold D.; Norman, R. Sean

    2015-01-15

    A draft genome of Sulfurospirillum sp. strain MES was isolated through taxonomic binning of a metagenome sequenced from a microbial electrosynthesis system (MES) actively producing acetate and hydrogen. The genome contains the nosZDFLY genes, which are involved in nitrous oxide reduction, suggesting the potential role of this strain in denitrification.

  7. Draft genome sequence of Thauera sp. strain SWB20, isolated from a Singapore wastewater treatment facility using gel microdroplets

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Dichosa, Armand E. K.; Davenport, Karen W.; Li, Po-E; Ahmed, Sanaa A.; Daligault, Hajnalka; Gleasner, Cheryl D.; Kunde, Yuliya; McMurry, Kim; Lo, Chien -Chi; Reitenga, Krista G.; et al

    2015-03-19

    In this study, we report here the genome sequence of Thauera sp. strain SWB20, isolated from a Singaporean wastewater treatment facility using gel microdroplets (GMDs) and single-cell genomics (SCG). This approach provided a single clonal microcolony that was sufficient to obtain a 4.9-Mbp genome assembly of an ecologically relevant Thauera species.

  8. The oncoprotein HBXIP upregulates PDGFB via activating transcription factor Sp1 to promote the proliferation of breast cancer cells

    SciTech Connect (OSTI)

    Zhang, Yingyi; Zhao, Yu; Li, Leilei; Shen, Yu; Cai, Xiaoli; Zhang, Xiaodong; Ye, Lihong

    2013-05-03

    Highlights: HBXIP is able to upregulate the expression of PDGFB in breast cancer cells. HBXIP serves as a coactivator of activating transcription factor Sp1. HBXIP stimulates the PDGFB promoter via activating transcription factor Sp1. HBXIP promotes the proliferation of breast cancer cell via upregulating PDGFB. -- Abstract: We have reported that the oncoprotein hepatitis B virus X-interacting protein (HBXIP) acts as a novel transcriptional coactivator to promote proliferation and migration of breast cancer cells. Previously, we showed that HBXIP was able to activate nuclear factor-?B (NF-?B) in breast cancer cells. As an oncogene, the platelet-derived growth factor beta polypeptide (PDGFB) plays crucial roles in carcinogenesis. In the present study, we found that both HBXIP and PDGFB were highly expressed in breast cancer cell lines. Interestingly, HBXIP was able to increase transcriptional activity of NF-?B through PDGFB, suggesting that HBXIP is associated with PDGFB in the cells. Moreover, HBXIP was able to upregulate PDGFB at the levels of mRNA, protein and promoter in the cells. Then, we identified that HBXIP stimulated the promoter of PDGFB through activating transcription factor Sp1. In function, HBXIP enhanced the proliferation of breast cancer cells through PDGFB in vitro. Thus, we conclude that HBXIP upregulates PDGFB via activating transcription factor Sp1 to promote proliferation of breast cancer cells.

  9. Draft genome sequence of Sulfurospirillum sp. strain MES, reconstructed from the metagenome of a microbial electrosynthesis system

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ross, Daniel E.; Marshall, Christopher W.; May, Harold D.; Norman, R. Sean

    2015-01-15

    A draft genome of Sulfurospirillum sp. strain MES was isolated through taxonomic binning of a metagenome sequenced from a microbial electrosynthesis system (MES) actively producing acetate and hydrogen. The genome contains the nosZDFLY genes, which are involved in nitrous oxide reduction, suggesting the potential role of this strain in denitrification.

  10. Additive synthesis with DIASS-M4C on Argonne National Laboratory`s IBM POWERparallel System (SP)

    SciTech Connect (OSTI)

    Kaper, H.; Ralley, D.; Restrepo, J.; Tiepei, S.

    1995-12-31

    DIASS-M4C, a digital additive instrument was implemented on the Argonne National Laboratory`s IBM POWER parallel System (SP). This paper discusses the need for a massively parallel supercomputer and shows how the code was parallelized. The resulting sounds and the degree of control the user can have justify the effort and the use of such a large computer.

  11. Collection efficiency of the Soot-Particle Aerosol Mass Spectrometer (SP-AMS) for internally mixed particulate black carbon

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Willis, M. D.; Lee, A. K. Y.; Onasch, T. B.; Fortner, E. C.; Williams, L. R.; Lambe, A. T.; Worsnop, D. R.; Abbatt, J. P. D.

    2014-05-26

    The soot-particle aerosol mass spectrometer (SP-AMS) uses an intra-cavity infrared laser to vaporize refractory black carbon (rBC) containing particles, making the particle beam–laser beam overlap critical in determining the collection efficiency (CE) for rBC and associated non-refractory particulate matter (NR-PM). This work evaluates the ability of the SP-AMS to quantify rBC and NR-PM mass in internally mixed particles with different thicknesses of organic coating. Using apparent relative ionization efficiencies for uncoated and thickly coated rBC particles, we report measurements of SP-AMS sensitivity to NR-PM and rBC, for Regal Black, the recommended particulate calibration material. Beam width probe (BWP) measurements aremore » used to illustrate an increase in sensitivity for highly coated particles due to narrowing of the particle beam, which enhances the CE of the SP-AMS by increasing the laser beam–particle beam overlap. Assuming complete overlap for thick coatings, we estimate CE for bare Regal Black particles of 0.6 ± 0.1, which suggests that previously measured SP-AMS sensitivities to Regal Black were underestimated by up to a factor of two. The efficacy of the BWP measurements is highlighted by studies at a busy road in downtown Toronto and at a non-roadside location, which show particle beam widths similar to, but greater than that of bare Regal Black and coated Regal Black, respectively. Further BWP measurements at field locations will help to constrain the range of CE for fresh and aged rBC-containing particles. The ability of the SP-AMS to quantitatively assess the composition of internally mixed particles is validated through measurements of laboratory-generated organic coated particles, which demonstrate that the SP-AMS can quantify rBC and NR-PM over a wide range of particle compositions and rBC core sizes.« less

  12. Collection efficiency of the soot-particle aerosol mass spectrometer (SP-AMS) for internally mixed particulate black carbon

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Willis, M. D.; Lee, A. K. Y.; Onasch, T. B.; Fortner, E. C.; Williams, L. R.; Lambe, A. T.; Worsnop, D. R.; Abbatt, J. P. D.

    2014-12-18

    The soot-particle aerosol mass spectrometer (SP-AMS) uses an intra-cavity infrared laser to vaporize refractory black carbon (rBC) containing particles, making the particle beam–laser beam overlap critical in determining the collection efficiency (CE) for rBC and associated non-refractory particulate matter (NR-PM). This work evaluates the ability of the SP-AMS to quantify rBC and NR-PM mass in internally mixed particles with different thicknesses of organic coating. Using apparent relative ionization efficiencies for uncoated and thickly coated rBC particles, we report measurements of SP-AMS sensitivity to NR-PM and rBC, for Regal Black, the recommended particulate calibration material. Beam width probe (BWP) measurements aremore » used to illustrate an increase in sensitivity for highly coated particles due to narrowing of the particle beam, which enhances the CE of the SP-AMS by increasing the laser beam–particle beam overlap. Assuming complete overlap for thick coatings, we estimate CE for bare Regal Black particles of 0.6 ± 0.1, which suggests that previously measured SP-AMS sensitivities to Regal Black were underestimated by up to a factor of 2. The efficacy of the BWP measurements is highlighted by studies at a busy road in downtown Toronto and at a non-roadside location, which show particle beam widths similar to, but greater than that of bare Regal Black and coated Regal Black, respectively. Further BWP measurements at field locations will help to constrain the range of CE for fresh and aged rBC-containing particles. The ability of the SP-AMS to quantitatively assess the composition of internally mixed particles is validated through measurements of laboratory-generated organic coated particles, which demonstrate that the SP-AMS can quantify rBC and NR-PM over a wide range of particle compositions and rBC core sizes.« less

  13. Lunar electric power systems utilizing the SP-100 reactor coupled to dynamic conversion systems. Final report

    SciTech Connect (OSTI)

    Harty, R.B.; Durand, R.E.

    1993-03-01

    An integration study was performed by Rocketdyne under contract to NASA-LeRC. The study was concerned with coupling an SP-0100 reactor to either a Brayton or Stirling power conversion system. The application was for a surface power system to supply power requirements to a lunar base. A power level of 550 kWe was selected based on the NASA Space Exploration Initiative 90-day study. Reliability studies were initially performed to determine optimum power conversion redundancy. This study resulted in selecting three operating engines and one stand-by unit. Integration design studies indicated that either the Brayton or Stirling power conversion systems could be integrated with the PS-100 reactor. The Stirling system had an integration advantage because of smaller piping size and fewer components. The Stirling engine, however, is more complex and heavier than the Brayton rotating unit, which tends to off-set the Stirling integration advantage. From a performance consideration, the Brayton had a 9 percent mass advantage, and the Stirling had a 50 percent radiator advantage.

  14. Overview of the 1986 free-piston Stirling SP-100 activities at the NASA Lewis Research Center

    SciTech Connect (OSTI)

    Slaby, J.G.

    1986-01-01

    An overview of the National Aeronautics and Space Administration (NASA) Lewis Research Center SP-100 free-piston Stirling engine activities is presented. These activities include a free-piston Stirling space-power technology feasibility demonstration project as part of the SP-100 program being conducted in support of the Department of Defense (DOD), Department of Energy (DOE), and NASA. The space-power Stirling advanced technology effort, under SP-100, addresses the status of the 25 kWe Space Power Demonstrator Engine (SPDE) including test results. Future space-power projections are presented along with a description of a study that will investigate the feasibility of scaling a single-cylinder free-piston Stirling space-power module to the 150 kW power range. Design parameters and conceptual design features will be presented for a 25 kWe, single-cylinder free-piston Stirling space-power converter. A description of a hydrodynamic gas bearing concept will be presented whereby the displacer of a 1 kWe free-piston Stirling engine is modified to demonstrate the bearing concept. And finally the goals of a conceptual design for a 25 kWe Solar Advanced Stirling Conversion System capable of delivering electric power to an electric utility grid will be discussed. The solar work is under an interagency agreement between DOE/Sandia National Laboratory and NASA Lewis.

  15. SpArcFiRe: Scalable automated detection of spiral galaxy arm segments

    SciTech Connect (OSTI)

    Davis, Darren R.; Hayes, Wayne B. E-mail: whayes@uci.edu

    2014-08-01

    Given an approximately centered image of a spiral galaxy, we describe an entirely automated method that finds, centers, and sizes the galaxy (possibly masking nearby stars and other objects if necessary in order to isolate the galaxy itself) and then automatically extracts structural information about the spiral arms. For each arm segment found, we list the pixels in that segment, allowing image analysis on a per-arm-segment basis. We also perform a least-squares fit of a logarithmic spiral arc to the pixels in that segment, giving per-arc parameters, such as the pitch angle, arm segment length, location, etc. The algorithm takes about one minute per galaxies, and can easily be scaled using parallelism. We have run it on all ?644,000 Sloan objects that are larger than 40 pixels across and classified as 'galaxies'. We find a very good correlation between our quantitative description of a spiral structure and the qualitative description provided by Galaxy Zoo humans. Our objective, quantitative measures of structure demonstrate the difficulty in defining exactly what constitutes a spiral 'arm', leading us to prefer the term 'arm segment'. We find that pitch angle often varies significantly segment-to-segment in a single spiral galaxy, making it difficult to define the pitch angle for a single galaxy. We demonstrate how our new database of arm segments can be queried to find galaxies satisfying specific quantitative visual criteria. For example, even though our code does not explicitly find rings, a good surrogate is to look for galaxies having one long, low-pitch-angle armwhich is how our code views ring galaxies. SpArcFiRe is available at http://sparcfire.ics.uci.edu.

  16. Effect of mono- and dichromatic light quality on growth rates and photosynthetic performance of Synechococcus sp. PCC 7002

    SciTech Connect (OSTI)

    Bernstein, Hans C.; Konopka, Allan; Melnicki, Matthew R.; Hill, Eric A.; Kucek, Leo A.; Zhang, Shuyi; Shen, Gaozhong; Bryant, Donald A.; Beliaev, Alex S.

    2014-09-19

    Synechococcus sp. PCC 7002 was grown to steady state in optically thin turbidostat cultures under conditions for which light quantity and quality was systematically varied by modulating the output of narrow-band LEDs. Cells were provided photons absorbed primarily by chlorophyll (680 nm) or phycocyanin (630 nm) as the organism was subjected to four distinct mono- and dichromatic regimes. During cultivation with dichromatic light, growth rates displayed by Synechococcus sp. PCC 7002 were generally proportional to the total incident irradiance at values < 275 mol photons m-2 s-1 and were not affected by the ratio of 630:680 nm wavelengths. Notably, under monochromatic light conditions, cultures exhibited similar growth rates only when they were irradiated with 630 nm light; cultures irradiated with only 680 nm light grew at rates that were 60 70% of those under other light quality regimes at equivalent irradiances. The functionality of photosystem II and associated processes such as maximum rate of photosynthetic electron transport, rate of cyclic electron flow, and rate of dark respiration generally increased as a function of growth rate. Nonetheless, some of the photophysiological parameters measured here displayed distinct patterns with respect to growth rate of cultures adapted to a single wavelength including phycobiliprotein content, which increased under severely light-limited growth conditions. Additionally, the ratio of photosystem II to photosystem I increased approximately 40% over the range of growth rates, although cells grown with 680 nm light only had the highest ratios. These results suggest the presence of effective mechanisms which allow acclimation of Synechococcus sp. PCC 7002 acclimation to different irradiance conditions.

  17. OO84O4c6sP HNF-SD-WM-II-740, Rev. OB

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    OO84O4c6sP HNF-SD-WM-II-740, Rev. OB Standard Inventories of Chemicals and Radionuclides in Hanford Site Tank Wastes M. J. Kupfer, A. L. Boldt, K. M. Hodgson, 1. W. Shelton, B. C. Simpson, and R. A. Watrous (LMHC); M. D. LeClair (SAIC); G. L. Borsheini (BA); R. T. Winward (MA); B. A. Higley and R. M. Orme (NHC); N.. G. Colton (PNNL); S. L. Lambert and D. E. Place (SESC); and W. W. Schulz (W S) Lockheed Martin Hanford Corporation, Richland, WA 99352 U.S. Department of Energy Contract

  18. Reversible elastic deformation of functionalized sp{sup 2} carbon at pressures of up to 33?GPa

    SciTech Connect (OSTI)

    Soignard, Emmanuel; Hochheimer, Hans D.; Yarger, Jeff; Raj, Rishi

    2014-10-06

    We show that sp{sup 2} carbon bonded to silicon and oxygen can withstand reversible elastic deformation at pressures of up to 33?GPa. These experiments were carried out in a diamond anvil cell. In-situ Raman spectroscopy was employed to record the reversibility of elastic deformation by measuring the movement in the D and G peaks of carbon. Above 33?GPa the material, a silicon oxycarbide, transforms into an unidentified state which is retained upon unloading down to ambient pressure. Thermodynamical analysis suggests that the material could have transformed into a crystalline state at these ultrahigh pressures, driven by mechanical work.

  19. Evidence regarding the UV sunscreen role of a mycosporine-like compound in the cyanobacterium Gloeocapsa sp

    SciTech Connect (OSTI)

    Garcia-Pichel, F.; Wingard, C.E.; Castenholz, R.W. )

    1993-01-01

    The mycosporine-like amino acids (MAAs) have been thought to serve a UV sunscreen role in organisms that produce or contain them because MAAs present strong absorbance in the UV region and because there is no other apparent biological function. The researchers used the cyanobacterium Gloeocapsa sp. to assess the possible sunscreen role of MAAs. Five conditions are evaluated: (1) absorption of radiation high enough to provide benefit to the organisms; (2) correlation of presence of the compound with enhansed fitness under UV; (3) concentration of the compound and resistance to UV still present under physiological inactivity; (4) effect maximal at wavelengths of maximal absorption; (5) loss of protection after artificial removal of compound. The results indicate that only a small sunscreen effect can be ascribed to the MAA in the Gloecapsa sp. under these experimental conditions. It is possible however, that in the typical undisturbed colonial growth form, MAAs and their screening action may become major factors in resistance to UV radiation. 25 refs., 7 figs., 1 tab.

  20. Nucleotide sequence of a chromosomal mercury resistance determinant from a Bacillus sp. with broad-spectrum mercury resistance. [Mercury reductase

    SciTech Connect (OSTI)

    Wang, Y.; Levinson, H.S.; Mahler, I. ); Moore, M.; Walsh, C. ); Silver, S. )

    1989-01-01

    A 13.5-kilobase HindIII fragment, bearing an intact mercury resistance (mer) operon, was isolated from chromosomal DNA of broad-spectrum mercury-resistant Bacillus sp. strain RC607 by using as a probe a clone containing the mercury reductase (merA) gene. The new clone, pYW33, expressed broad-spectrum mercury resistance both in Escherichia coli and in Bacillus subtilis, but only in B. subtilis was the mercuric reductase activity inducible. Sequencing of a 1.8-kilobase mercury hypersensitivity-producing fragment revealed four open reading frames (ORFs). ORF1 may code for a regulatory protein (MerR). ORF2 and ORF4 were associated with cellular transport function and the hypersensitivity phenotype. DNA fragments encompassing the merA and the merB genes were sequenced. The predicted Bacillus sp. strain RC607 MerA (mercuric reductase) and MerB (organomercurial lyase) were similar to those predicted from Staphylococcus aureus plasmid pI258 (67 and 73% amino acid identities, respectively); however, only 40% of the amino acid residues of RC607 MerA were identical to those of the mercuric reductase from gram-negative bacteria. A 69-kilodalton polypeptide was isolated and identified as the merA gene product by examination of its amino-terminal sequence.

  1. Spatially-Resolved Analysis of Glycolipids and Metabolites in Living Synechococcus sp. PCC7002 Using Nanospray Desorption Electrospray Ionization

    SciTech Connect (OSTI)

    Lanekoff, Ingela T.; Geydebrekht, Oleg V.; Pinchuk, Grigoriy E.; Konopka, Allan; Laskin, Julia

    2013-04-07

    Microorganisms release a diversity of organic compounds that couple interspecies metabolism, enable communication, or provide benefits to other microbes. Increased knowledge of microbial metabolite production will contribute to understanding of the dynamic microbial world and can potentially lead to new developments in drug discovery, biofuel production, and clinical research. Nanospray desorption electrospray ionization (nano-DESI) is an ambient ionization technique that enables detailed chemical characterization of molecules from a specific location on a surface without special sample pretreatment. Due to its ambient nature, living bacterial colonies growing on agar plates can be rapidly and non-destructively analyzed. We performed spatially resolved nano-DESI analysis of living Synechococcus sp. PCC 7002 colonies on agar plates. We use high resolution mass spectrometry and MS/MS analysis of the living Synechococcus sp. PCC 7002 colonies to detect metabolites and lipids, and confirm their identities. We found that despite the high salt content of the agar (osmolarity ca. 700 mM), nano-DESI analysis enables detailed characterization of metabolites produced by the colony. Using this technique, we identified several glycolipids found on the living colonies and examined the effect of the age of the colony on the chemical gradient of glucosylglycerol secreted onto agar.

  2. Genome Sequence of Thermotoga sp Strain RQ2, a Hyperthermophilic Bacterium Isolated from a Geothermally Heated Region of the Seafloor near Ribeira Quente, the Azores

    SciTech Connect (OSTI)

    Swithers, Kristen S; DiPippo, Jonathan L; Bruce, David; Detter, J. Chris; Tapia, Roxanne; Han, Cliff; Woyke, Tanja; Pitluck, Sam; Pennacchio, Len; Nolan, Matt; Mikhailova, Natalia; Lykidis, A; Land, Miriam L; Stetter, Karl O; Nelson, Karen E; Gogarten, Peter; Noll, Kenneth M

    2011-01-01

    Thermotoga sp. strain RQ2 is probably a strain of Thermotoga maritima. Its complete genome sequence allows for an examination of the extent and consequences of gene flow within Thermotoga species and strains. Thermotoga sp. RQ2 differs from T. maritima in its genes involved in myo-inositol metabolism. Its genome also encodes an apparent fructose phosphotransferase system (PTS) sugar transporter. This operon is also found in Thermotoga naphthophila strain RKU-10 but no other Thermotogales. These are the first reported PTS transporters in the Thermotogales.

  3. Mutations that affect structure and assembly of light-harvesting proteins in the cyanobacterium Synechocystis sp. strain 6701

    SciTech Connect (OSTI)

    Anderson, L.K.; Rayner, M.C.; Eiserling, F.A.

    1987-01-01

    The unicellular cyanobacterium Synechocystis sp. strain 6701 was mutagenized with UV irradiation and screened for pigment changes that indicated genetic lesions involving the light-harvesting proteins of the phycobilisome. A previous examination of the pigment mutant UV16 showed an assembly defect in the phycocyanin component of the phycobilisome. Mutagenesis of UV16 produced an additional double mutant, UV16-40, with decreased phycoerythrin content. Phycocyanin and phycoerythrin were isolated from UV16-40 and compared with normal biliproteins. The results suggested that the UV16 mutation affected the alpha subunit of phycocyanin, while the phycoerythrin beta subunit from UV16-40 had lost one of its three chromophores. Characterization of the unassembled phycobilisome components in these mutants suggests that these strains will be useful for probing in vivo the regulated expression and assembly of phycobilisomes.

  4. Draft Genome Sequence of Streptomyces sp. Strain Wb2n-11, a Desert Isolate with Broad-Spectrum Antagonism against Soilborne Phytopathogens

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Köberl, Martina; White, Richard A.; Erschen, Sabine; El-Arabi, Tarek F.; Jansson, Janet K.; Berg, Gabriele

    2015-08-06

    Streptomyces sp. strain Wb2n-11, isolated from native desert soil, exhibited broad-spectrum antagonism against plant pathogenic fungi, bacteria, and nematodes. The 8.2-Mb draft genome reveals genes putatively responsible for its promising biocontrol activity and genes which enable the soil bacterium to directly interact beneficially with plants.

  5. Complete genome sequence of Anaeromyxobacter sp. Fw109-5, an Anaerobic, Metal-Reducing Bacterium Isolated from a Contaminated Subsurface Environment

    SciTech Connect (OSTI)

    Hwang, C.; Copeland, A.; Lucas, Susan; Lapidus, Alla; Barry, Kerrie W.; Glavina del Rio, T.; Dalin, Eileen; Tice, Hope; Pitluck, S.; Sims, David R.; Brettin, T.; Bruce, David; Detter, J. C.; Han, Cliff F.; Schmutz, Jeremy; Larimer, F.; Land, M.; Hauser, L.; Kyrpides, Nikos C.; Lykidis, Athanasios; Richardson, P. M.; Beliaev, Alex S.; Sanford, Robert A.; Loeffler, Frank E.; Fields, Matthew W.

    2015-01-22

    We report the genome sequence of Anaeromyxobacter sp. Fw109-5, isolated from nitrate- and uranium-contaminated subsurface sediment of the Oak Ridge Integrated Field-Scale Subsurface Research Challenge (IFC) site, Oak Ridge Reservation, TN. The bacteriums genome sequence will elucidate its physiological potential in subsurface sediments undergoing in situ uranium bioremediation and natural attenuation.

  6. Draft Genome Sequence of Streptomyces sp. Strain Wb2n-11, a Desert Isolate with Broad-Spectrum Antagonism against Soilborne Phytopathogens

    SciTech Connect (OSTI)

    Kberl, Martina; White, Richard A.; Erschen, Sabine; El-Arabi, Tarek F.; Jansson, Janet K.; Berg, Gabriele

    2015-08-06

    Streptomyces sp. strain Wb2n-11, isolated from native desert soil, exhibited broad-spectrum antagonism against plant pathogenic fungi, bacteria, and nematodes. The 8.2-Mb draft genome reveals genes putatively responsible for its promising biocontrol activity and genes which enable the soil bacterium to directly interact beneficially with plants.

  7. Draft Genome sequence of Frankia sp. Strain QA3, a nitrogen-fixing actinobacterium isolated from the root nodule of Alnus nitida

    SciTech Connect (OSTI)

    Sen, Arnab; Beauchemin, Nicholas; Bruce, David; Chain, Patrick S. G.; Chen, Amy; Davenport, Karen W.; Deshpande, Shweta; Detter, J. Chris; Furnholm, Teal; Ghodhbane-Gtari, Faten; Goodwin, Lynne A.; Gtari, Maher; Han, James; Huntemann, Marcel; Ivanova, N; Kyrpides, Nikos C; Land, Miriam L; Markowitz, Victor; Mavromatis, K; Nolan, Matt; Nouioui, Imen; Pagani, Ioanna; Pati, Amrita; Pitluck, Sam; Santos, Catarina; Sur, Saubashya; Szeto, Ernest; Tavares, Fernando; Teshima, Hazuki; Thakur, Subarna; Wall, Luis; Woyke, Tanja; Wishart, Jessie; Tisa, Louis S.

    2013-01-01

    Members of actinomycete genus Frankia form a nitrogen-fixing symbiosis with 8 different families of actinorhizal plants. We report a high-quality draft genome sequence for Frankia sp. stain QA3, a nitrogen-fixing actinobacterium isolated from root nodules of Alnus nitida.

  8. Draft Genome sequence of Frankia sp. strains CN3 , an atypical, non-infective (Nod-) ineffective (Fix-) isolate from Coriaria nepalensis

    SciTech Connect (OSTI)

    Ghodhbane-Gtari, Faten; Beauchemin, Nicholas; Bruce, David; Chain, Patrick S. G.; Chen, Amy; Davenport, Karen W.; Deshpande, Shweta; Detter, J. Chris; Furnholm, Teal; Goodwin, Lynne A.; Gtari, Maher; Han, Cliff; Han, James; Huntemann, Marcel; Ivanova, N; Kyrpides, Nikos C; Land, Miriam L; Markowitz, Victor; Mavromatis, K; Nolan, Matt; Nouioui, Imen; Pagani, Ioanna; Pati, Amrita; Pitluck, Sam; Santos, Catarina; Sen, Arnab; Sur, Saubashya; Szeto, Ernest; Tavares, Fernando; Hazuki, Teshima; Thakur, Subarna; Wall, Luis; Woyke, Tanja; Tisa, Louis S.

    2013-01-01

    We report here the genome sequence of Frankia sp. strain CN3, which was isolated from Coriaria nepalensis. This genome sequence is the first from the fourth lineage of Frankia, that are unable to re-infect actinorhizal plants. At 10 Mb, it represents the largest Frankia genome sequenced to date.

  9. Growth of Chlamydomonas reinhardtii in acetate-free medium when co-cultured with alginate-encapsulated, acetate-producing strains of Synechococcus sp. PCC 7002

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Therien, Jesse B.; Zadvornyy, Oleg A.; Posewitz, Matthew C.; Bryant, Donald A.; Peters, John W.

    2014-10-18

    The model alga Chlamydomonas reinhardtii requires acetate as a co-substrate for optimal production of lipids, and the addition of acetate to culture media has practical and economic implications for algal biofuel production. We demonstrate the growth of C. reinhardtii on acetate provided by mutant strains of the cyanobacterium Synechococcus sp. PCC7002.

  10. Complete genome sequence of Anaeromyxobacter sp. Fw109-5, an anaerobic, metal-reducing bacterium isolated from a contaminated subsurface environment

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hwang, C.; Copeland, A.; Lucas, S.; Lapidus, A.; Barry, K.; Glavina del Rio, T.; Dalin, E.; Tice, H.; Pitluck, S.; Sims, D.; et al

    2015-01-22

    We report the genome sequence of Anaeromyxobacter sp. Fw109-5, isolated from nitrate- and uranium-contaminated subsurface sediment of the Oak Ridge Integrated Field-Scale Subsurface Research Challenge (IFC) site, Oak Ridge Reservation, TN. The bacteriums genome sequence will elucidate its physiological potential in subsurface sediments undergoing in situ uranium bioremediation and natural attenuation.

  11. Complete genome sequence of Anaeromyxobacter sp. Fw109-5, an Anaerobic, Metal-Reducing Bacterium Isolated from a Contaminated Subsurface Environment

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hwang, C.; Copeland, A.; Lucas, Susan; Lapidus, Alla; Barry, Kerrie W.; Glavina del Rio, T.; Dalin, Eileen; Tice, Hope; Pitluck, S.; Sims, David R.; et al

    2015-01-22

    We report the genome sequence of Anaeromyxobacter sp. Fw109-5, isolated from nitrate- and uranium-contaminated subsurface sediment of the Oak Ridge Integrated Field-Scale Subsurface Research Challenge (IFC) site, Oak Ridge Reservation, TN. The bacterium’s genome sequence will elucidate its physiological potential in subsurface sediments undergoing in situ uranium bioremediation and natural attenuation.

  12. Draft genome sequence of Thauera sp. strain SWB20, isolated from a Singapore wastewater treatment facility using gel microdroplets

    SciTech Connect (OSTI)

    Dichosa, Armand E. K.; Davenport, Karen W.; Li, Po-E; Ahmed, Sanaa A.; Daligault, Hajnalka; Gleasner, Cheryl D.; Kunde, Yuliya; McMurry, Kim; Lo, Chien -Chi; Reitenga, Krista G.; Daughton, Ashlynn R.; Shen, Xiaohong; Frietze, Seth; Wang, Dongping; Johnson, Shannon L.; Drautz-Moses, Daniela I.; Schuster, Stephan; Chain, Patrick S.; Han, Cliff

    2015-03-19

    In this study, we report here the genome sequence of Thauera sp. strain SWB20, isolated from a Singaporean wastewater treatment facility using gel microdroplets (GMDs) and single-cell genomics (SCG). This approach provided a single clonal microcolony that was sufficient to obtain a 4.9-Mbp genome assembly of an ecologically relevant Thauera species.

  13. Hybrid radiosity-SP{sub 3} equation based bioluminescence tomography reconstruction for turbid medium with low- and non-scattering regions

    SciTech Connect (OSTI)

    Chen, Xueli E-mail: jimleung@mail.xidian.edu.cn; Zhang, Qitan; Yang, Defu; Liang, Jimin E-mail: jimleung@mail.xidian.edu.cn

    2014-01-14

    To provide an ideal solution for a specific problem of gastric cancer detection in which low-scattering regions simultaneously existed with both the non- and high-scattering regions, a novel hybrid radiosity-SP{sub 3} equation based reconstruction algorithm for bioluminescence tomography was proposed in this paper. In the algorithm, the third-order simplified spherical harmonics approximation (SP{sub 3}) was combined with the radiosity equation to describe the bioluminescent light propagation in tissues, which provided acceptable accuracy for the turbid medium with both low- and non-scattering regions. The performance of the algorithm was evaluated with digital mouse based simulations and a gastric cancer-bearing mouse based in situ experiment. Primary results demonstrated the feasibility and superiority of the proposed algorithm for the turbid medium with low- and non-scattering regions.

  14. Transcriptomic and proteomic dynamics in the metabolism of a diazotrophic cyanobacterium, Cyanothece sp. PCC 7822 during a diurnal light–dark cycle

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Welkie, David; Zhang, Xiaohui; Markillie, Meng; Taylor, Ronald; Orr, Galya; Jacobs, Jon; Bhide, Ketaki; Thimmapuram, Jyothi; Gritsenko, Marina; Mitchell, Hugh; et al

    2014-12-29

    Cyanothece sp. PCC 7822 is an excellent cyanobacterial model organism with great potential to be applied as a biocatalyst for the production of high value compounds. Like other unicellular diazotrophic cyanobacterial species, it has a tightly regulated metabolism synchronized to the light-dark cycle. Utilizing transcriptomic and proteomic methods, we were able to quantify the relationships between transcription and translation underlying central and secondary metabolism in response to nitrogen free, 12 hour light and 12 hour dark conditions.

  15. Transcriptomic and proteomic dynamics in the metabolism of a diazotrophic cyanobacterium, Cyanothece sp. PCC 7822 during a diurnal lightdark cycle

    SciTech Connect (OSTI)

    Welkie, David; Zhang, Xiaohui; Markillie, Meng; Taylor, Ronald; Orr, Galya; Jacobs, Jon; Bhide, Ketaki; Thimmapuram, Jyothi; Gritsenko, Marina; Mitchell, Hugh; Smith, Richard D; Sherman, Louis A

    2014-12-29

    Cyanothece sp. PCC 7822 is an excellent cyanobacterial model organism with great potential to be applied as a biocatalyst for the production of high value compounds. Like other unicellular diazotrophic cyanobacterial species, it has a tightly regulated metabolism synchronized to the light-dark cycle. Utilizing transcriptomic and proteomic methods, we were able to quantify the relationships between transcription and translation underlying central and secondary metabolism in response to nitrogen free, 12 hour light and 12 hour dark conditions.

  16. Integrated in silico analyses of regulatory and metabolic networks of Synechococcus sp. PCC 7002 reveal relationships between gene centrality and essentiality

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Song, Hyun-Seob; McClure, Ryan S.; Bernstein, Hans C.; Overall, Christopher C.; Hill, Eric A.; Beliaev, Alex S.

    2015-03-27

    Cyanobacteria dynamically relay environmental inputs to intracellular adaptations through a coordinated adjustment of photosynthetic efficiency and carbon processing rates. The output of such adaptations is reflected through changes in transcriptional patterns and metabolic flux distributions that ultimately define growth strategy. To address interrelationships between metabolism and regulation, we performed integrative analyses of metabolic and gene co-expression networks in a model cyanobacterium, Synechococcus sp. PCC 7002. Centrality analyses using the gene co-expression network identified a set of key genes, which were defined here as ‘topologically important.’ Parallel in silico gene knock-out simulations, using the genome-scale metabolic network, classified what we termedmore » as ‘functionally important’ genes, deletion of which affected growth or metabolism. A strong positive correlation was observed between topologically and functionally important genes. Functionally important genes exhibited variable levels of topological centrality; however, the majority of topologically central genes were found to be functionally essential for growth. Subsequent functional enrichment analysis revealed that both functionally and topologically important genes in Synechococcus sp. PCC 7002 are predominantly associated with translation and energy metabolism, two cellular processes critical for growth. This research demonstrates how synergistic network-level analyses can be used for reconciliation of metabolic and gene expression data to uncover fundamental biological principles.« less

  17. Overexpression, purification, crystallization and preliminary X-ray cystallographic studies of a proline-specific aminopeptidase from Aneurinibacillus sp. strain AM-1

    SciTech Connect (OSTI)

    Akioka, Makoto [Department of Applied Biochemistry, Kyoto Prefectural University, Shimogamo, Sakyo, Kyoto 606-8522 (Japan); Nakano, Hiroaki [Department of Structural Biology, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida Shimoadachi-cho, Sakyo, Kyoto 606-8501 (Japan); Horikiri, Aya; Tsujimoto, Yoshiyuki; Matsui, Hiroshi [Department of Applied Biochemistry, Kyoto Prefectural University, Shimogamo, Sakyo, Kyoto 606-8522 (Japan); Shimizu, Tetsuya; Nakatsu, Toru; Kato, Hiroaki [Department of Structural Biology, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida Shimoadachi-cho, Sakyo, Kyoto 606-8501 (Japan); Watanabe, Kunihiko, E-mail: kwatanab@kpu.ac.jp [Department of Applied Biochemistry, Kyoto Prefectural University, Shimogamo, Sakyo, Kyoto 606-8522 (Japan)

    2006-12-01

    Preliminary X-ray crystallographic study of a proline-specific aminopepitdase from Aneurinibacillus sp, strain AM-1 was carried out. To elucidate the structure and molecular mechanism of a characteristic proline-specific aminopeptidase produced by the thermophile Aneurinibacillus sp. strain AM-1, its gene was cloned and the recombinant protein was overexpressed in Escherichia coli, purified and crystallized using the hanging-drop vapour-diffusion method. X-ray diffraction data were collected to 1.8 resolution from the recombinant aminopeptidase crystal. The crystals belong to the orthorhombic space group P2{sub 1}2{sub 1}2, with unit-cell parameters a = 93.62, b = 68.20, c = 76.84 . A complete data set was also obtained from crystals of SeMet-substituted aminopeptidase. Data in the resolution range 202.1 from the MAD data set from the SeMet-substituted crystal were used for phase determination.

  18. Evaluation of the 1998 Predictions of the Run-Timing of Wild Migrant Yearling Chinook and Water Quality at Multiple Locations on the Snake and Columbia Rivers using CRiSP/RealTime, 1998 Technical Report.

    SciTech Connect (OSTI)

    Beer, W. Nicholas; Hayes, Joshua A.; Shaw, Pamela

    1999-07-21

    Since 1988, wild salmon have been PIT-tagged through monitoring and research programs conducted by the Columbia River fisheries agencies and Tribes. Workers at the University of Washington have used detection data at Lower Granite Dam to generate predictions of arrival distributions for various stocks at the dam. The prediction tool is known as RealTime. In 1996, RealTime predictions were linked to a downstream migration model, CRiSP.1. The composite model, known as CRiSP/RealTime, predicts the arrival distribution and fraction transported at downriver locations.

  19. Fibroblast growth factor-2 up-regulates the expression of nestin through the RasRafERKSp1 signaling axis in C6 glioma cells

    SciTech Connect (OSTI)

    Chang, Kai-Wei; Huang, Yuan-Li; Wong, Zong-Ruei; Su, Peng-Han; Huang, Bu-Miin; Ju, Tsai-Kai; Technology Commons, College of Life Science, National Taiwan University, Taipei 106, Taiwan ; Yang, Hsi-Yuan

    2013-05-17

    Highlights: Nestin expression in C6 glioma cells is induced by FGF-2. Nestin expression is induced by FGF-2 via de novo RNA and protein synthesis. The FGFR inhibitor SU5402 blocks the FGF-2-induced nestin expression. The mRNA of FGFR1 and 3 are detected in C6 glioma cells. RasRafERKSp1 signaling pathway is responsibe for FGF-2-induced nestin expression. -- Abstract: Nestin is a 240-kDa intermediate filament protein expressed mainly in neural and myogenic stem cells. Although a substantial number of studies have focused on the expression of nestin during development of the central nervous system, little is known about the factors that induce and regulate its expression. Fibroblast growth factor-2 (FGF-2) is an effective mitogen and stimulates the proliferation and differentiation of a subset of nestin-expressing cells, including neural progenitor cells, glial precursor cells, and smooth muscle cells. To assess whether FGF-2 is a potent factor that induces the expression of nestin, C6 glioma cells were used. The results showed that nestin expression was up-regulated by FGF-2 via de novo RNA and protein synthesis. Our RT-PCR results showed that C6 glioma cells express FGFR1/3, and FGFRs is required for FGF-2-induced nestin expression. Further signaling analysis also revealed that FGF-2-induced nestin expression is mediated through FGFRMAPKERK signaling axis and the transcriptional factor Sp1. These findings provide new insight into the regulation of nestin in glial system and enable the further studies on the function of nestin in glial cells.

  20. The Dark Side of Algae Cultivation. Characterizing night biomass loss in three photosynthetic algae, Chlorella sorokiniana, Nannochloropsis salina and Picochlorum sp

    SciTech Connect (OSTI)

    Edmundson, Scott J.; Huesemann, Michael H.

    2015-10-28

    Night biomass loss in photosynthetic algae is an essential parameter that is often overlooked when modeling or optimizing biomass productivities. Night respiration acts as a tax on daily biomass gains and has not been well characterized in the context of biofuel production. We examined the night biomass loss in three algae strains that may have potential for commercial biomass production (Nannochloropsis salina- CCMP1776, Chlorella sorokiniana- DOE1412, and Picochlorum sp. LANL-WT). Biomass losses were monitored by ash free dry weight (AFDW mg/L-1) and optical density (OD750) on a thermal-gradient incubator. Night biomass loss rates were highly variable (ranging from -0.006 to -0.59 day -1), species-specific, and dependent on both culture growth phase prior to the dark period and night pond temperature. In general, the fraction of biomass lost over a 10 hour dark period, which ranged from ca. 1 to 22% in our experiments, was positively correlated with temperature and declined as the culture transitioned from exponential to linear to stationary phase. The dynamics of biomass loss should be taken into consideration in algae strain selection, are critical in predictive modeling of biomass production based on geographic location and can influence the net productivity of photosynthetic cultures used for bio-based fuels or products.

  1. Growth of Chlamydomonas reinhardtii in acetate-free medium when co-cultured with alginate-encapsulated, acetate-producing strains of Synechococcus sp. PCC 7002

    SciTech Connect (OSTI)

    Therien, Jesse B.; Zadvornyy, Oleg A.; Posewitz, Matthew C.; Bryant, Donald A.; Peters, John W.

    2014-10-18

    The model alga Chlamydomonas reinhardtii requires acetate as a co-substrate for optimal production of lipids, and the addition of acetate to culture media has practical and economic implications for algal biofuel production. We demonstrate the growth of C. reinhardtii on acetate provided by mutant strains of the cyanobacterium Synechococcus sp. PCC7002.

  2. Kallotenue papyrolyticum gen. nov., sp. nov., a cellulolytic and filamentous thermophile that represents a novel lineage (Kallotenuales ord. nov., Kallotenuaceae fam. nov.) within the class Chloroflexia

    SciTech Connect (OSTI)

    Cole, Jesse; Gieler, Brandon; Heisler, Devon; Palisoc, Maryknoll; Williams, Amanda; Dohnalkova, Alice; Ming, Hong; Yu, Tian T.; Dodsworth, Jeremy A.; Li, Wen J.; Hedlund, Brian P.

    2013-08-15

    Several closely-related, thermophilic, and cellulolytic bacterial strains, designated JKG1T, JKG2, JKG3, JKG4, and JKG5, were isolated from a cellulolytic enrichment (corn stover) incubated in the water column of Great Boiling Spring, NV. Strain JKG1T had cells of a diameter of 0.7 - 0.9 ?m and length of ~2.0 ?m that formed non-branched multicellular filaments reaching >300 ?m. Spores were not formed and dense liquid cultures were red. The temperature range for growth was 45-65 C, with an optimum of 55 C. The pH range for growth was 5.6-9.0, with an optimum of 7.5. JKG1T grew as an aerobic heterotroph, utilizing glucose, sucrose, xylose, arabinose, cellobiose, carboxymethylcellulose, filter paper, microcrystalline cellulose, xylan, starch, casamino acids, tryptone, peptone, yeast extract, acetate, citrate, lactate, pyruvate, and glycerol as sole carbon sources, and was not observed to photosynthesize. The cells stained Gram-negative. Phylogenetic analysis using 16S rRNA gene sequences placed the new isolates in the class Chloroflexia, but distant from other cultivated members, with the highest sequence identity of 82.5% to Roseiflexus castenholzii. The major quinone was menaquinone-9; no ubiquinones were detected. The major cellular fatty acids (>5%) were C18:0, anteiso-C17:0, iso-C18:0, and iso-C17:0. C16:0, iso-C16:0, and C17:0. The peptidoglycan amino acids were alanine, ornithine, glutamic acid, serine, and asparagine. Whole-cell sugars included mannose, rhamnose, glucose, galactose, ribose, arabinose, and xylose. Morphological, phylogenetic, and chemotaxonomic results suggest that JKG1T is representative of a new lineage within the class Chloroflexia, which we propose to designate Kallotenue papyrolyticum gen. nov., sp. nov., Kallotenuaceae fam. nov., Kallotenuales ord. nov.

  3. Fig. 20.1.sp

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

  4. Fig. 20.2.sp

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

  5. Fig. 20.3.sp

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

  6. Fig. 20.5.sp

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

  7. Accumulation of Pb and Cu heavy metals in sea water, sediment, and leaf and root tissue of Enhalus sp. in the seagrass bed of Banten Bay

    SciTech Connect (OSTI)

    Fauziah, Faiza Choesin, Devi N.

    2014-03-24

    Banten Bay in Indonesia is a coastal area which has been highly affected by human activity. Previous studies have reported the presence of lead (Pb) and copper (Cu) heavy metals in the seawater of this area. This study was conducted to measure the accumulation of Pb and Cu in seawater, sediment, leaf tissue, and root tissue of the seagrass species Enhalus sp. Sampling was conducted at two observation stations in Banten Bay: Station 1 (St.1) was located closer to the coastline and to industrial plants as source of pollution, while Station 2 (St.2) was located farther away offshore. At each station, three sampling points were established by random sampling. Field sampling was conducted at two different dates, i.e., on 29 May 2012 and 30 June 2012. Samples were processed by wet ashing using concentrated HNO{sub 3} acid and measured using Atomic Absorption Spectrometry (AAS). Accumulation of Pb was only detected in sediment samples in St.1, while Cu was detected in all samples. Average concentrations of Cu in May were as follows: sediment St.1 = 0.731 ppm, sediment St.2 = 0.383 ppm, seawater St.1 = 0.163 ppm, seawater St.2 = 0.174 ppm, leaf St.1 = 0.102 ppm, leaf St.2 = 0.132 ppm, root St.1= 0.139 ppm, and root St.2 = 0.075 ppm. Average measurements of Cu in June were: sediment St.1 = 0.260 ppm, leaf St.1 = 0.335 ppm, leaf St.2 = 0.301 ppm, root St.1= 0.047 ppm, and root St.2 = 0.060 ppm. In June, Cu was undetected in St.2 sediment and seawater at both stations. In May, Cu concentration in seawater exceeded the maximum allowable threshold for water as determined by the Ministry of the Environment. Spatial and temporal variation in Pb and Cu accumulation were most probably affected by distance from source and physical conditions of the environment (e.g., water current and mixing)

  8. Cis-Chlorobenzene dihydrodiol dehydrogenase (TcbB) from Pseudomonas sp. strain P51, expressed in Escherichia coli DH5{alpha}(pTCB149), catalyzes enantioselective dehydrogenase reactions

    SciTech Connect (OSTI)

    Raschke, H.; Fleischmann, T.; Meer, J.R. van der; Kohler, H.P.E.

    1999-12-01

    cis-Chlorobenzene dihydrodiol dehydrogenase (CDD) from Pseudomonas sp. strain P51, cloned into Escherichia coli DH5{alpha}(pTCB149) was able to oxidize cis-dihydrodihydroxy derivatives (cis-dihydrodiols) of dihydronaphthalene, indene, and four para-substituted toluenes to the corresponding catechols. During the incubation of a nonracemic mixture of cis-1,2-indandiol, only the (+)-cis-(1R,2S) enantiomer was oxidized; the (-)-cis-(S,2R) enantiomer remained unchanged, CDD oxidized both enantiomers of cis-1,2-dihydroxy-1,2,3,4-tetrahydronaphthalene, but oxidation of the (+)-cis-(1S,2R) enantiomer was delayed until the (-)-cis-(1R,2S) enantiomer was completely depleted. When incubated with nonracemic mixtures of para-substituted cis-toluene dihydrodiols, CDD always oxidized the major enantiomer at a higher rate than the minor enantiomer. When incubated with racemic 1-indanol, CDD enantioselectively transformed the (+)-(1S) enatiomer to 1-indanone. This stereoselective transformation shows that CDD also acted as an alcohol dehydrogenase. Additionally, CDD was able to oxidize (+)-cis-(1R,2S)-dihydroxy-1,2-dihydronaphthalene, (+)-cis-monochlorobiphenyl dihydrodiols, and (+)-cis-toluene dihydrodiol to the corresponding catechols.

  9. Thermoflexus hugenholtzii gen. nov., sp. nov., a thermophilic, microaerophilic, filamentous bacterium representing a novel class in the Chloroflexi, Thermoflexia classis nov., and description of Thermoflexaceae fam. nov. and Thermoflexales ord. nov.

    SciTech Connect (OSTI)

    Dodsworth, Jeremy A.; Gevorkian, Jonathan; Despujos, Fairuz; Cole, Jesse; Murugapiran, Senthil K.; Ming, Hong; Li, Wen J.; Zhang, Gengxin; Dohnalkova, Alice; Hedlund, Brian P.

    2014-06-06

    A thermophilic, filamentous, heterotrophic bacterium designated strain JAD2T was isolated from sediment of Great Boiling Spring in Nevada, USA. Cells had an average diameter of 0.3 m and length of 4.0 m, and formed filaments typically ranging in length from 20 m to 200 m. Filaments were negative for the Gram stain reaction, spores were not formed, and motility was not observed. The optimum temperature for growth was 75 C with a range from 67.5-75 C, and the optimum pH for growth was 6.75 with a range from 6.5-7.75. Peptone, tryptone or yeast extract were able to support growth when supplemented with a vitamin solution, but no growth was observed using a variety of defined organic substrates. Strain JAD2T was a facultative microaerophile, with optimal growth at 1% v/v O2 and an upper limit of 8% O2, and anaerobic growth was stimulated by fumarate but inhibited by sulfite and elemental sulfur. The major cellular fatty acids (>5%) were C16:0, C19:0, C18:0, C20:0, and C19:1. The genomic DNA G+C content was 69.3%. Phylogenetic and phylogenomic analyses using 16S rRNA gene sequences and other conserved genes placed JAD2T and other members of the yet-uncultivated GAL35 group within the phylum Chloroflexi, but not within any existing class in this phylum. These results indicate that strain JAD2T is the first cultivated representative of a new lineage within the phylum Chloroflexi, for which we propose the name Thermoflexus hugenholtzii gen. nov., sp. nov., type strain JAD2T, within Thermoflexia classis nov., Thermoflexales ord. nov., and Thermoflexaceae fam. nov.

  10. IMAT SpA | Open Energy Information

    Open Energy Info (EERE)

    33074 Sector: Renewable Energy, Solar Product: Italy-based company specializing in manufacturing of components for household refrigeration. Their main renewable energy focus is...

  11. Sorgenia SpA | Open Energy Information

    Open Energy Info (EERE)

    Services Product: Sorgenia produces electricity from both renewable energy sources and natural gas. It also buys and sells electricity and gas in the market and provides energy...

  12. Microsoft Word - 2011_sp_02.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    0.8 1.0 1.2 1.4 1.6 1.8 2.0 2003 2004 2005 2006 2007 2008 2009 2010 Claudette (H1) Ivan (H5) Katrina (H5) & Rita (H5) Erin (TS) & Dean (H5) Natural Gas (right axis) Crude Oil (left...

  13. Microsoft Word - 2011_sp_01.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Notice - June 2011 Independent Statistics & Analysis U.S. Energy Information Administration June 2011 Short-Term Energy Outlook Notice: Suspension of Regional Residential Heating Oil and Propane Price Forecasts Because of fiscal year 2011 budget reductions, the U.S. Energy Information Administration (EIA) has suspended surveys that were the source of historical price data published in Tables 12-15 and 34-38 of the Petroleum Marketing Monthly (PMM) that supported the residential retail

  14. Microsoft Word - 2012_sp_02.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Brent Crude Oil Spot Price Forecast 1 July 10, 2012 Short-Term Energy Outlook Supplement: Brent Crude Oil Spot Price Forecast Since the mid-1980s, benchmark crude oil prices such as West Texas Intermediate (WTI) in the United States and Brent crude oil in Europe have served as reference points that the market uses for pricing other crude oils. The historically close relationships between the major benchmarks made WTI prices a reliable indicator of the average cost of crude oil to U.S. refiners,

  15. Microsoft Word - 2012_sp_04.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Change in Regional and U.S. Degree-Day Calculations 1 September 11, 2012 Short-Term Energy Outlook Supplement: Change in Regional and U.S. Degree-Day Calculations Average daily temperatures during the summer and winter months, reported as population- weighted cooling degree days (CDDs) and heating degree days (HDDs), respectively, are important in explaining and forecasting the consumption of energy for space cooling and heating in the U.S. Energy Information Administration's Short-Term Energy

  16. Microsoft Word - 2013_sp_02.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    U.S. Crude Oil Production Outlook 1 February 14, 2013 Short-Term Energy Outlook Supplement: Key drivers for EIA's short-term U.S. crude oil production outlook Crude oil production increased by 790,000 barrels per day (bbl/d) between 2011 and 2012, the largest increase in annual output since the beginning of U.S. commercial crude oil production in 1859. The U.S. Energy Information Administration (EIA) expects U.S. crude oil production to continue rising over the next two years represented in the

  17. Microsoft Word - 2013_sp_05.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Estimates of Crude Oil and Liquid Fuels Supply Disruptions 1 September 10, 2013 Short-Term Energy Outlook Supplement: EIA Estimates of Crude Oil and Liquid Fuels Supply Disruptions 1 Unplanned crude oil and liquid fuels supply disruptions may occur frequently in many countries and for a variety of reasons, including conflicts, natural disasters, and technical difficulties. Although crude oil and liquid fuels supply disruptions may occur at any time, recent outages have particularly unsettled the

  18. The [NiFe]-hydrogenase of the cyanobacterium Synechocystis sp...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PCC 6803 works bidirectionally with a bias to H2 production Authors: McIntosh, C. L., ... can be easily monitored as current under rapidly changing experimental conditions. ...

  19. Microsoft Word - FY 2015 SP Performance Appraisal System Guidance...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... Results Driven, Business Acumen and Building Coalitions. ... values, and other factors. o Balances change and ... o Implements organizational vision that aligns key ...

  20. sp3-hybridized framework structure of group-14 elements discovered...

    Office of Scientific and Technical Information (OSTI)

    with energy band gaps close to the optimal values for optoelectronic or photovoltaic applications. With metal-atom encapsulation, the P42mnm structure would also be a...

  1. Solution Package Scope Definition, Report 72, Salt Waste (SP #72)

    Broader source: Energy.gov [DOE]

    Supporting Technical Document for the Radiological Release Accident Investigation Report (Phase II Report)

  2. Solar Ventures SpA | Open Energy Information

    Open Energy Info (EERE)

    Zip: 20122 Sector: Solar Product: Solar PV project developer investor, focused on the Italian market and considering projects in Greece and France. References: Solar Ventures...

  3. FY 2016 SES and SP Opening Guidance Memo_0.pdf

    Office of Environmental Management (EM)

  4. SP-100 Program: space reactor system and subsystem investigations

    SciTech Connect (OSTI)

    Harty, R.B.

    1983-09-30

    For a space reactor power system, a comprehensive safety program will be required to assure that no undue risk is present. This report summarizes the nuclear safety review/approval process that will be required for a space reactor system. The documentation requirements are presented along with a summary of the required contents of key documents. Finally, the aerospace safety program conducted for the SNAP-10A reactor system is summarized. The results of this program are presented to show the type of program that can be expected and to provide information that could be usable in future programs.

  5. System and method for introduction and stabilization of genes in Thermus sp.

    DOE Patents [OSTI]

    Kayser, Kevin J.; Park, Ho-Shin; Kilbane, II, John J.

    2005-03-01

    A method for introducing and stabilizing heterologous and recombinant genes in a thermophilic host in which a characteristic gene defining a detectable host characteristic is inactivated or deleted from the thermophilic host, resulting in a modified thermophilic host expressing an absence of the detectable host characteristic. A DNA fragment of interest is inserted into the modified thermophilic host together with an intact characteristic gene, whereby the detectable host characteristic is restored to the thermophilic host, thereby enabling detection and confirmation of successful transformation using plasmid vectors and integration of the DNA fragment into the chromosome of the thermophilic host.

  6. Assessment of Radioactive Liquid Effluents Release at IPEN-CNEN/SP

    SciTech Connect (OSTI)

    Bessa Nisti, Marcelo; Godoy dos Santos, Adir Janete

    2008-08-07

    A continuous effluent monitoring program has been established at IPEN's plant in order to allow an environmental impact assessment due to radioactive liquid effluent discharge to sanitary system. Representative samples of radioactive liquid effluents are analyzed by using high resolution gamma spectroscopy and instrumental neutron activation analysis, facing to Brazilian radioprotection regulatory rules. The results are consolidating yearly in the Institute source-term. In this paper, results of the source-term are presented, concerning to years 2004, 2005 and 2006. The total activity discharged was 8.5xl0{sup 8} Bq, 5.7x10{sup 8} Bq and 2.7xl0{sup 8} Bq, respectively. As the release is strongly dependent on the total amount of the effluent and on the dilution factor, special attention is needed in order to obtain the correct value of that last one. The estimated inside plant dilution factor, considering the recent facilities and the reshaping of the sewerage system was 80, 180 and 130, for period of 2004, 2005 and 2006 discharged liquid radioactive effluent.

  7. OpL^^f-B^ JPL D-1085 D O Technical Information Report SP-100...

    Office of Scientific and Technical Information (OSTI)

    ... Several smsdler DOD contracts are expected to be in place shortly. Early in fiscal year 1984 a contract will be let by JPL to study civiliancommercial missions. NASA has also set ...

  8. Dynamic proteome analysis of Cyanothece sp. ATCC 51142 under constant light

    SciTech Connect (OSTI)

    Aryal, Uma K.; Stockel, Jana; Welsh, Eric A.; Gritsenko, Marina A.; Nicora, Carrie D.; Koppenaal, David W.; Smith, Richard D.; Pakrasi, Himadri B.; Jacobs, Jon M.

    2012-02-03

    Understanding the dynamic nature of protein abundances provides insights into protein turnover not readily apparent from conventional, static mass spectrometry measurements. This level of data is particularly informative when surveying protein abundances in biological systems subjected to large perturbations or alterations in environment such as cyanobacteria. Our current analysis expands upon conventional proteomic approaches in cyanobacteria by measuring dynamic changes of the proteome using a 13C15N-L-leucine metabolic labeling in Cyanothece ATCC51142. Metabolically labeled Cyanothece ATCC51142 cells grown under nitrogen sufficient conditions in continuous light were monitored longitudinally for isotope incorporation over a 48 h period, revealing 422 proteins with dynamic changes in abundances. In particular, proteins involved in carbon fixation, pentose phosphate pathway, cellular protection, redox regulation, protein folding, assembly and degradation showed higher levels of isotope incorporation suggesting that these biochemical pathways are important for growth under non-diazotrophic conditions. Calculation of relative isotope abundances (RIA) values allowed to measure actual active protein synthesis over time for different biochemical pathways under non-diazotrophic conditions. Overall results demonstrated the utility of 'non-steady state' pulsed metabolic labeling for systems-wide dynamic quantification of the proteome in Cyanothece ATCC51142 that can also be applied to other cyanobacteria.

  9. AHSS Stamping Project … A/SP 050; Nonlinear Strain Paths Project...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AHSS Stamping Project ASP 050; Nonlinear Strain Paths Project ASP 061 AHSS Stamping Project ASP 050; Nonlinear Strain Paths Project ASP 061 2011 DOE Hydrogen and ...

  10. Process for producing ethanol from plant biomass using the fungus Paecilomyces sp

    DOE Patents [OSTI]

    Wu, J.F.

    1985-08-08

    A process for producing ethanol from plant biomass is disclosed. The process includes forming a substrate from the biomass with the substrate including hydrolysates of cellulose and hemicellulose. A species of the fungus Paecilomyces which has the ability to ferment both cellobiose and xylose to ethanol is then selected and isolated. The substrate is inoculated with this fungus, and the inoculated substrate is then fermented under conditions favorable for cell viability and conversion of hydrolysates to ethanol. Finally, ethanol is recovered from the fermented substrate. 5 figs., 3 tabs.

  11. Smartgrid EV Communication module (SpEC) SAE DC Charging Digital...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Makes electric vehicles more convenient and reliable Can be used to achieve smart grid communication Can be used as a PEV or EVSE emulator to aid in testing and protocol...

  12. Carbonaceous Aerosols and Radiative Effects Study (CARES), g1-aircraft, sedlacek sp2

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sedlacek, Art

    The primary objective of the Carbonaceous Aerosol and Radiative Effects Study (CARES) in 2010 was to investigate the evolution of carbonaceous aerosols of different types and their optical and hygroscopic properties in central California, with a focus on the Sacramento urban plume.

  13. Process for producing ethanol from plant biomass using the fungus paecilomyces sp.

    DOE Patents [OSTI]

    Wu, Jung Fu

    1989-01-01

    A process for producing ethanol from plant biomass is disclosed. The process in cludes forming a substrate from the biomass with the substrate including hydrolysates of cellulose and hemicellulose. A species of the fungus Paecilomyces, which has the ability to ferment both cellobiose and xylose to ethanol, is then selected and isolated. The substrate is inoculated with this fungus, and the inoculated substrate is then fermented under conditions favorable for cell viability and conversion of hydrolysates to ethanol. Finally, ethanol is recovered from the fermented substrate.

  14. Treatment Facility D Krauter, P.W.; Harrar, J.E.; Orloff, S.P...

    Office of Scientific and Technical Information (OSTI)

    Lab., CA (United States) USDOE Assistant Secretary for Environment, Safety, and Health, Washington, DC (United States) United States 1998-01-01 English Technical Report...

  15. Microsoft Word - BL SP3 Table 11-03 v19 - final1.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    EXPERIMENTAL STATIONS - PROJECTED CAPABILITIES AFTER SPEAR3 COMMISSIONING Projections could vary depending upon completion of upgrade activities and radiation shielding requirements BEAM LINE ID (Scientific Disciplines) EXPERIMENTAL STATION TYPE (Energy/Wave Length Range) TECHNIQUES/ CAPABILITIES (Sci/Technical Contacts) http://www- ssrl.slac.stanford.edu/staff/ sci_support.html INSTRUMENTATION AVAILABLE (Web Links) http://www- ssrl.slac.stanford.edu/beamlines/ bl_characteristics.html STATUS AT

  16. Biofuels from Microalgae: Review of Products, Processes and Potential, with Special Focus on Dunaliella sp.

    SciTech Connect (OSTI)

    Huesemann, Michael H.; Benemann, John R.

    2009-12-31

    There is currently great interest in using microalgae for the production of biofuels, mainly due to the fact that microalgae can produce biofuels at a much higher productivity than conventional plants and that they can be cultivated using water, in particular seawater, and land not competing for resources with conventional agriculture. However, at present such microalgae-based technologies are not yet developed and the economics of such processes are uncertain. We review power generation by direct combustion, production of hydrogen and other fuel gases and liquids by gasification and pyrolysis, methane generation by anaerobic digestion, ethanol fermentations, and hydrogen production by dark and light-driven metabolism. We in particular discuss the production of lipids, vegetable oils and hydrocarbons, which could be converted to biodiesel. Direct combustion for power generation has two major disadvantages in that the high N-content of algal biomass causes unacceptably high NOx emissions and losses of nitrogen fertilizer. Thus, the use of sun-dried microalgal biomass would not be cost-competitive with other solid fuels such as coal and wood. Thermochemical conversion processes such as gasification and pyrolysis have been successfully demonstrated in the laboratory but will be difficult to scale up commercially and suffers from similar, though sometimes not as stringent, limitations as combustion. Anaerobic digestion of microalgal cells yields only about 0.3 L methane per g volatile solids destroyed, about half of the maximum achievable, but yields can be increased by adding carbon rich substrates to circumvent ammonia toxicity caused by the N-rich algal biomass. Anaerobic digestion would be best suited for the treatment of algal biomass waste after value-added products have been separated. Algae can also be grown to accumulate starches or similar fermentable products, and ethanol or similar (e.g., butanol) fermentations could be applied to such biomass, but research is required on increasing solvent yields. Dark fermentation of algal biomass can also produce hydrogen, but, as for other fermentations, only at low yields. Hydrogen can also be generated by algae in the light, however, this process has not yet been demonstrated in any way that could be scaled up and, in any event, Dunaliella, is not known to produce hydrogen. In response to nutrient deficiency (nitrogen or silicon), some microalgae accumulate neutral lipids which, after physical extraction, could be converted, via transesterification with methanol, to biodiesel. Nitrogen-limitation does not appear to increase either cellular lipid content or lipid productivity in Dunaliella. Results from life cycle energy analyses indicate that cultivation of microalgal biomass in open raceway ponds has a positive energy output ratio (EOR), approaching up to 10 (i.e., the caloric energy output from the algae is 10 times greater than the fossil energy inputs), but EOR are less than 1 for biomass grown in engineered photobioreactors. Thus, from both an energetic as well as economic perspective, only open ponds systems can be considered. Significant long-term R&D will be required to make microalgal biofuels processes economically competitive. Specifically, future research should focus on (a) the improvement of biomass productivities (i.e., maximizing solar conversion efficiencies), (b) the selection and isolation of algal strains that can be mass cultured and maintained stably for long periods, (c) the production of algal biomass with a high content of lipids, carbohydrates, and co-products, at high productivity, (d) the low cost harvesting of the biomass, and (e) the extraction and conversion processes to actually derive the biofuels. For Dunaliella specifically, the highest potential is in the co-production of biofuels with high-value animal feeds based on their carotenoid content.

  17. FY15 SES SP Performance Appraisal Cycle_Memo to Heads of Departmental _0.pdf

    Office of Environmental Management (EM)

  18. Carbonaceous Aerosols and Radiative Effects Study (CARES), g1-aircraft, sedlacek sp2

    SciTech Connect (OSTI)

    Sedlacek, Art

    2011-08-30

    The primary objective of the Carbonaceous Aerosol and Radiative Effects Study (CARES) in 2010 was to investigate the evolution of carbonaceous aerosols of different types and their optical and hygroscopic properties in central California, with a focus on the Sacramento urban plume.

  19. Complete Genome Sequence of Pelosinus sp. Strain UFO1 Assembled Using Single-Molecule Real-Time DNA Sequencing Technology

    SciTech Connect (OSTI)

    Steven D. Brown; Sagar M. Utturkar; Timothy S. Magnuson; Allison E. Ray; Farris L. Poole; W. Andrew Lancaster; Michael P. Thorgersen; Michael W. W. Adams; Dwayne A. Elias

    2014-09-01

    Pelosinus fermentans strain R7 was isolated from Russian kaolin clays as the type strain and it can reduce Fe(III) during fermentative growth (1). Draft genome sequences for P. fermentans R7 and four strains from Hanford, Washington, USA, have been published (24). The P. fermentans 16S rRNA sequence dominated the lactate-based enrichment cultures from three geochemically contrasting soils from the Melton Branch Watershed, Oak Ridge, Tennessee, USA (5) and also at another stimulated, uraniumcontaminated field site near Oak Ridge (6). For the current work, strain UFO1 was isolated from pristine sediments at a background field site in Oak Ridge and characterized as facilitating U(VI) reduction and precipitation with phosphate (7).

  20. Complete genome sequence of Pelosinus sp. strain UFO1 assembled using single-molecule real-time DNA sequencing technology

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Brown, Steven D.; Utturkar, Sagar M.; Magnuson, Timothy S.; Ray, Allison E.; Poole, Farris L.; Lancaster, W. Andrew; Thorgersen, Michael P.; Adams, Michael W. W.; Elias, Dwayne A.

    2014-09-04

    Pelosinus fermentans strain R7 was isolated from Russian kaolin clays as the type strain and it can reduce Fe(III) during fermentative growth (1). Draft genome sequences for P. fermentans R7 and four strains from Hanford, Washington, USA, have been published (2–4). The P. fermentans 16S rRNA sequence dominated the lactate-based enrichment cultures from three geochemically contrasting soils from the Melton Branch Watershed, Oak Ridge, Tennessee, USA (5) and also at another stimulated, uraniumcontaminated field site near Oak Ridge (6). For the current work, strain UFO1 was isolated from pristine sediments at a background field site in Oak Ridge and characterizedmore » as facilitating U(VI) reduction and precipitation with phosphate (7).« less

  1. Microsoft Word - Final New England Constraint STEO Supplement 011713v1 clean _4_ LF_SP_rev cw.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New England Natural Gas Constraints 1 January 18, 2013 Short-Term Energy Outlook Supplement: Constraints in New England likely to affect regional energy prices this winter Since November, New England has had the highest average spot natural gas prices in the nation. Average prices at the Algonquin Citygate trading point, a widely used index for New England natural gas buyers, have been $3 per million British thermal units (MMBtu) higher than natural gas prices at the Henry Hub, and more than $2

  2. Final predictions of ambient conditions along the east-west crossdrift using the 3-D UZ site-scale model. Level 4 milestoneSP33ABM4.

    SciTech Connect (OSTI)

    Ritcey, A.C.; Sonnenthal, E.L.; Wu, Y.S.; Haukwa, C.; Bodvarsson,G.S.

    1998-03-01

    In 1998, the Yucca Mountain Site Characterization Project (YMP) is expected to continue construction of an East-West Cross Drift. The 5-meter diameter drift will extend from the North Ramp of the Exploratory Studies Facility (ESF), near Station 19+92, southwest through the repository block, and over to and through the Solitario Canyon Fault. This drift is part of a program designed to enhance characterization of Yucca Mountain and to complement existing surface-based and ESF testing studies. The objective of this milestone is to use the three-dimensional (3-D) unsaturated zone (UZ) site-scale model to predict ambient conditions along the East-West Cross Drift. These predictions provide scientists and engineers with a priori information that can support design and construction of the East-West Cross Drift and associated testing program. The predictions also provide, when compared with data collected after drift construction, an opportunity to test and verify the calibration of the 3-D UZ site-scale model.

  3. Complete genome sequence of Pelosinus sp. strain UFO1 assembled using single-molecule real-time DNA sequencing technology

    SciTech Connect (OSTI)

    Brown, Steven D.; Utturkar, Sagar M.; Magnuson, Timothy S.; Ray, Allison E.; Poole, Farris L.; Lancaster, W. Andrew; Thorgersen, Michael P.; Adams, Michael W. W.; Elias, Dwayne A.

    2014-09-04

    Pelosinus fermentans strain R7 was isolated from Russian kaolin clays as the type strain and it can reduce Fe(III) during fermentative growth (1). Draft genome sequences for P. fermentans R7 and four strains from Hanford, Washington, USA, have been published (24). The P. fermentans 16S rRNA sequence dominated the lactate-based enrichment cultures from three geochemically contrasting soils from the Melton Branch Watershed, Oak Ridge, Tennessee, USA (5) and also at another stimulated, uraniumcontaminated field site near Oak Ridge (6). For the current work, strain UFO1 was isolated from pristine sediments at a background field site in Oak Ridge and characterized as facilitating U(VI) reduction and precipitation with phosphate (7).

  4. RNA polymerase gene, microorganism having said gene and the production of RNA polymerase by the use of said microorganism

    DOE Patents [OSTI]

    Kotani, Hirokazu (Muko, JP); Hiraoka, Nobutsugu (Muko, JP); Obayashi, Akira (Uji, JP)

    1991-01-01

    SP6 bacteriophage RNA polymerase is produced by cultivating a new microorganism (particularly new strains of Escherichia coli) harboring a plasmid that carries SP6 bacteriophage RNA polymerase gene and recovering SP6 bacteriophage RNA polymerase from the culture broth. SP6 bacteriophage RNA polymerase gene is provided as are new microorganisms harboring a plasmid that carries SP6 bacteriophage RNA polymerase gene.

  5. Subject: Executive and Senior Level Pay and Performance Management System …

    Energy Savers [EERE]

    FY 2016 Senior Professional (SP) Performance Appraisal System Opening Guidance 2 Table of Contents Contents I. SP PERFORMANCE APPRAISAL TEMPLATE and TIMELINE ....................................................................... 3 II. PERFORMANCE PLAN - CRITICAL ELEMENTS .......................................................................................... 3 III. SP SUMMARY RATING LEVEL DEFINITIONS

  6. Accelerating the development of transparent graphene electrodes...

    Office of Scientific and Technical Information (OSTI)

    spatially resolved Raman spectroscopy, and water contact angle measurement. Covalent attachment rehybridized some of the delocalized graphene sp2 orbitals to localized sp3 states....

  7. PowerPoint Presentation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    0 -1 1 0 * SP1 yields the diffusion equation * SP3 can be simplified to two moment equations (0 , 2...

  8. Niagara Air Quality Survey Report, 1987: Occidental Chemical Corporation, Niagara Falls, New York, USA, non-aqueous phase liquid (NAPL) incineration test. Report no. ARB-166-87-AR/SP

    SciTech Connect (OSTI)

    Bell, R.W.; DeBrou, G.

    1988-01-01

    An ambient air quality survey was conducted in the Niagara Falls area of Ontario from October 8-12, 1987 to provide on-site real-time screening for selected polychlorinated biphenyl congeners and other chlorinated organics at times when the Occidental Chemical Corporation was conducting tests at its liquid hazardous waste incineration facility in Niagara Falls, N.Y. During the incineration tests, the winds were such that the gaseous emissions from the Occidental facility were carried into the U.S. Since the monitoring units were restricted to the Canadian side of the Niagara River, only upwind air quality parameters could be measured.

  9. Solar Park Co Ltd S P | Open Energy Information

    Open Energy Info (EERE)

    Co Ltd S P Jump to: navigation, search Name: Solar & Park Co Ltd (S&P) Place: Gwangju, Korea (Republic) Product: S&P Corp is a metal manufacturer, which owns and operates at least...

  10. Process for biological material carbon-carbon bond formation

    DOE Patents [OSTI]

    Hollingsworth, R.I.; Jung, S.; Mindock, C.A.

    1998-12-22

    A process for providing vicinal dimethyl long chain between alkyl groups of organic compounds is described. The process uses intact or disrupted cells of various species of bacteria, particularly Thermoanaerobacter sp., Sarcina sp. and Butyrivibrio sp. The process can be conducted in an aqueous reaction mixture at room temperatures. 8 figs.

  11. Process for biological material carbon-carbon bond formation

    DOE Patents [OSTI]

    Hollingsworth, Rawle I.; Jung, Seunho; Mindock, Carol A.

    1998-01-01

    A process for providing vicinal dimethyl long chain between alkyl groups of organic compounds is described. The process uses intact or disrupted cells of various species of bacteria, particularly Thermoanaerobacter sp., Sarcina sp. and Butyrivibrio sp. The process can be conducted in an aqueous reaction mixture at room temperatures.

  12. Safety pharmacology Current and emerging concepts

    SciTech Connect (OSTI)

    Hamdam, Junnat; Sethu, Swaminathan; Smith, Trevor; Alfirevic, Ana; Alhaidari, Mohammad; Atkinson, Jeffrey; Ayala, Mimieveshiofuo; Box, Helen; Cross, Michael; Delaunois, Annie; Dermody, Ailsa; Govindappa, Karthik; Guillon, Jean-Michel; Jenkins, Rosalind; Kenna, Gerry; Lemmer, Bjrn; Meecham, Ken; Olayanju, Adedamola; Pestel, Sabine; Rothfuss, Andreas; and others

    2013-12-01

    Safety pharmacology (SP) is an essential part of the drug development process that aims to identify and predict adverse effects prior to clinical trials. SP studies are described in the International Conference on Harmonisation (ICH) S7A and S7B guidelines. The core battery and supplemental SP studies evaluate effects of a new chemical entity (NCE) at both anticipated therapeutic and supra-therapeutic exposures on major organ systems, including cardiovascular, central nervous, respiratory, renal and gastrointestinal. This review outlines the current practices and emerging concepts in SP studies including frontloading, parallel assessment of core battery studies, use of non-standard species, biomarkers, and combining toxicology and SP assessments. Integration of the newer approaches to routine SP studies may significantly enhance the scope of SP by refining and providing mechanistic insight to potential adverse effects associated with test compounds. - Highlights: SP mandatory non-clinical risk assessments performed during drug development. SP organ system studies ensure the safety of clinical participants in FiH trials. Frontloading in SP facilitates lead candidate drug selection. Emerging trends: integrating SP-Toxicological endpoints; combined core battery tests.

  13. Dr. Oliver Simpson Metallurgical Laboratory

    Office of Legacy Management (LM)

    Oliver Simpson Metallurgical Laboratory p. 0. Box 5207 Chicago DO, Illinola ~. : Dear Dr. Simpson: Since your telephone call of's week ago regarding a possible 5000 pound order for regular rotary fired SP beryllium oxide for AC Spark Plug Company, Flint, Michigan,, we have been .busv reviewring our production achodules and have now established the-following~schedule eon SP beryllium oxide production: Vie plan to' commence pr.oducMon of SP beryllLum oxide on September 16 and expect to pounds

  14. Time-Resolved Study of Bonding in Liquid Carbon

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    spectrum of carbon-60, the researchers were able to establish that low-density liquid carbon contains predominantly twofold-coordinated chain structures (sp hybridization). As...

  15. 1

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... in angular moments (the spherical harmonics method) or a stochastic approach (the ... Augustus (diffusion-P 1 ) and Spartan (simplified spherical harmonics, SP N ) codes. ...

  16. 2002 User Survey Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    recommendations NERSC did the following: Improved debug and interactive turnaround during prime time by setting aside 5% of the SP compute pool for interactive and debug jobs from...

  17. Washington's 2nd congressional district: Energy Resources | Open...

    Open Energy Info (EERE)

    Biofuels LLC Energy Generation Facilities in Washington's 2nd congressional district S.P. Everett Biomass Facility Utility Companies in Washington's 2nd congressional district...

  18. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    "Instituto de Fsica de So Carlos, Universidade de So Paulo, So Carlos-SP ... CreatorsAuthors contains: "Instituto de Fsica de So Carlos, Universidade de So ...

  19. Direct-Current Resistivity Survey At Blue Mountain Area (Fairbank...

    Open Energy Info (EERE)

    have been conducted specifically for the geothermal program at Blue Mountain include a self-potential (SP) survey, and additional IPelectrical resistivity traversing. These...

  20. Microsoft Word - ORNL-TM-2008-185.doc

    Office of Scientific and Technical Information (OSTI)

    ... and development rms root mean square rpm revolutions per minute SEM scanning electron microscopy Si silicon SP specific power TC thermocouple THS Toyota Hybrid System USCAR ...

  1. A=12O (1975AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    75AJ02) (Not illustrated) This nucleus has not been observed: see (1968AJ02, 1972WA07, 1973SP1A, 1974IR04

  2. Self Potential At Mt Princeton Hot Springs Geothermal Area (Richards...

    Open Energy Info (EERE)

    groundwater flux patterns Notes Researchers collected 2700 SP measurements. Equilibrium temperature data from wells and shallow (305 cm) holes was correlated to geoelectrical...

  3. Adventive Hydrothermal Circulation On Stromboli Volcano (Aeolian...

    Open Energy Info (EERE)

    on May 2008 a multidisciplinary study involving Electrical Resistivity Tomography (ERT), Ground Penetrating Radar (GPR), Self-Potential (SP), CO2 soil diffuse degassing and soil...

  4. Multiple Mechanisms of Uranium Immobilization by Cellulomonas...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Multiple Mechanisms of Uranium Immobilization by Cellulomonas sp. Strain ES6 Citation Details In-Document Search Title: Multiple Mechanisms of Uranium ...

  5. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    sp. Fw109-5, isolated from nitrate- and uranium-contaminated subsurface sediment of the Oak Ridge Integrated Field-Scale Subsurface Research Challenge (IFC) site, Oak...

  6. Non-Destructive Analysis Calibration Standards for Gaseous Diffusion...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Current practices used to perform NDA measurements frequently have poorly defined uncertainties due to multiple factors. Working reference material (WRM) standards and container-sp...

  7. Presentations

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of performance between the SP and UCLA's own Appleseed cluster of G4 Macintosh computers will also be presented. Kernel and Application Code Performance for a Spectral...

  8. Advanced Leds | Open Energy Information

    Open Energy Info (EERE)

    Place: Coventry, England, United Kingdom Zip: CV5 6SP Product: Advanced Leds develops LED technology for outdoor lighting, including street lighting applications. Coordinates:...

  9. T-546: Microsoft MHTML Input Validation Hole May Permit Cross-Site

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Scripting Attacks Arbitrary Code | Department of Energy 6: Microsoft MHTML Input Validation Hole May Permit Cross-Site Scripting Attacks Arbitrary Code T-546: Microsoft MHTML Input Validation Hole May Permit Cross-Site Scripting Attacks Arbitrary Code January 31, 2011 - 7:00am Addthis PROBLEM: Microsoft MHTML Input Validation Hole May Permit Cross-Site Scripting Attacks Arbitrary Code. PLATFORM: Microsoft 2003 SP2, Vista SP2, 2008 SP2, XP SP3, 7; and prior service packs ABSTRACT: A

  10. Biomass Boiler Market is Projected to Reach USD 8,907.0 Million...

    Open Energy Info (EERE)

    Naval SpA, Hurst Boiler & Welding Co, Inc., Jernforsen Energi System AB, Justsen Energiteknik AS, Kohlbach Group, LAMBION Energy Solutions GmbH, Leroux & Lotz Technologies,...

  11. History and Results of Surface Exploration in the Kilauea East...

    Open Energy Info (EERE)

    (SP) surveys, possibly resistivity soundings, and soil gas surveys. Authors Murray C. Gardner, James R. McNitt, Christopher W. Klein, James B. Koenig and Dean Nakano...

  12. Polo Nacional de Biocombustiveis Brazilian Biofuels Programme...

    Open Energy Info (EERE)

    Nacional de Biocombustiveis Brazilian Biofuels Programme Jump to: navigation, search Name: Polo Nacional de Biocombustiveis (Brazilian Biofuels Programme) Place: Piracicaba (SP),...

  13. Biocapital | Open Energy Information

    Open Energy Info (EERE)

    Jump to: navigation, search Name: Biocapital Place: CharqueadaSP, Brazil Sector: Biofuels Product: Brazilian biodiesel producer which operates as a biofuels distributor and...

  14. Office\tof\tExecutive\tResources Office\tof\tthe\tChief\tHuman\tCapital...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Office of Executive Resources Office of the Chief Human Capital Officer U.S. Department of Energy FY 2015 Senior Executive Service (SES) and Senior Professional (SP) Performance ...

  15. FY 2016 SENIOR EXECUTIVE SERVICE (SES) AND SENIOR PROFESSIONAL...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    APPRAISAL OPENING GUIDANCE FY 2016 SENIOR EXECUTIVE SERVICE (SES) AND SENIOR PROFESSIONAL (SP) PERFORMANCE APPRAISAL OPENING GUIDANCE FY 2016 performance appraisal cycle for ...

  16. Patent Record Announcement | GE Global Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    exceptional technology that's not yet commercialized, but is viewed as a potential market game-changer, for Signa SP MRI Magnet; a Coolidge Fellowship Award in 1998, the...

  17. Friends of Berkeley Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Map Contact Member Spotlight sp3 Nanocarriers May Carry New Hope for Brain Cancer Therapy Berkeley Lab researchers have developed a new family of nanocarriers, called...

  18. Well Log Techniques At Raft River Geothermal Area (1977) | Open...

    Open Energy Info (EERE)

    the rock using well log data. Notes Information is given on the following logs: dual-induction focused log, including resistivity, sp, and conductivity; acoustic log; compensated...

  19. T-578: Vulnerability in MHTML Could Allow Information Disclosure |

    Energy Savers [EERE]

    Department of Energy 8: Vulnerability in MHTML Could Allow Information Disclosure T-578: Vulnerability in MHTML Could Allow Information Disclosure March 15, 2011 - 3:05pm Addthis PROBLEM: Microsoft Windows is prone to a vulnerability that may allow attackers to inject arbitrary script code into the current browser session. PLATFORM: Windows 2003 SP2, Vista SP2, 2008 SP2, XP SP3, 7; and prior service packs ABSTRACT: A vulnerability was reported in Microsoft MHTML. A remote user can conduct

  20. ANALYTIC EXPRESSIONS FOR THE LIGHT-SCATTERING CROSS SECTION

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of r and m, with many "wiggles" on many scales, and its computation, though straightforward, is time intensive. A simple expression for Q sp would simplify calculation of...

  1. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    The dosimetric parameters Sc, Sp and TPR vary depending on radio, the transmission effect of the MLC, inverse square law and dose profile are used for the calculation....

  2. Supporting technology for enhanced oil recovery for thermal processes

    SciTech Connect (OSTI)

    Reid, T.B.; Bolivar, J.

    1997-12-01

    This report contains the results of efforts under the six tasks of the Ninth Amendment and Extension of Annex IV, Enhanced Oil Recovery Thermal Processes of the Venezuela/USA Agreement. The report is presented in sections (for each of the 6 tasks) and each section contains one or more reports prepared by various individuals or groups describing the results of efforts under each of the tasks. A statement of each task, taken from the agreement, is presented on the first page of each section. The tasks are numbered 62 through 67. The first, second, third, fourth fifth, sixth, seventh, eighth, and ninth reports on Annex IV, [Venezuela MEM/USA-DOE Fossil Energy Report IV-1, IV-2, IV-3, IV-4, IV-5, IV-6, IV-7, and IV-8 (DOE/BETC/SP-83/15, DOE/BC-84/6/SP, DOE/BC-86/2/SP, DOE/BC-87/2/SP, DOE/BC-90/1/SP, DOE/BC-90/1/SP) (DOE/BC-92/1/SP, DOE/BC-93/3/SP, and DOE/BC-95/3/SP)] contain the results from the first 61 tasks. Those reports are dated April 1983, August 1984, March 1986, July 1987, November 1988, October 1991, February 1993, and March 1995 respectively.

  3. Performance Management | Department of Energy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Performance Management Performance Management Documents available for download November 10, 2015 FY 2016 SENIOR EXECUTIVE SERVICE (SES) AND SENIOR PROFESSIONAL (SP) PERFORMANCE...

  4. Self-potential observations during hydraulic fracturing

    SciTech Connect (OSTI)

    Moore, Jeffrey R.; Glaser, Steven D.

    2007-09-13

    The self-potential (SP) response during hydraulic fracturing of intact Sierra granite was investigated in the laboratory. Excellent correlation of pressure drop and SP suggests that the SP response is created primarily by electrokinetic coupling. For low pressures, the variation of SP with pressure drop is linear, indicating a constant coupling coefficient (Cc) of -200 mV/MPa. However for pressure drops >2 MPa, the magnitude of the Cc increases by 80% in an exponential trend. This increasing Cc is related to increasing permeability at high pore pressures caused by dilatancy of micro-cracks, and is explained by a decrease in the hydraulic tortuosity. Resistivity measurements reveal a decrease of 2% prior to hydraulic fracturing and a decrease of {approx}35% after fracturing. An asymmetric spatial SP response created by injectate diffusion into dilatant zones is observed prior to hydraulic fracturing, and in most cases this SP variation revealed the impending crack geometry seconds before failure. At rupture, injectate rushes into the new fracture area where the zeta potential is different than in the rock porosity, and an anomalous SP spike is observed. After fracturing, the spatial SP distribution reveals the direction of fracture propagation. Finally, during tensile cracking in a point load device with no water flow, a SP spike is observed that is caused by contact electrification. However, the time constant of this event is much less than that for transients observed during hydraulic fracturing, suggesting that SP created solely from material fracture does not contribute to the SP response during hydraulic fracturing.

  5. Background:

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    iSUPPLIER PORTAL ACCESS SYSTEM REQUIREMENTS Oracle PO Team mlbritt Page 1 10/28/2010 TABLE OF CONTENTS Recommended Browsers for iSupplier Portal Recommended Microsoft Internet Explorer Browser Settings (MSIE) Recommended Firefox Browser Settings Recommended Safari Browser Settings SYSTEM REQUIREMENTS AND TROUBLESHOOTING HINTS Recommended Browsers for iSupplier Portal BROWSER WINDOWS XP SP2 & WINDOWS XP SP3 WINDOWS VISTA & WINDOWS VISTA SP1 MAC OS X V10.3.9 MAC OS X V10.4.7 OR HIGHER

  6. June 2014 Most Viewed Documents for Fission And Nuclear Technologies...

    Office of Scientific and Technical Information (OSTI)

    Final report Brown, W.H.; Gopalakrishnan, S.; Fehlau, R.; Thompson, W.E.; Wilson, D.G. (1982) 19 SP-100, the US Space Nuclear Reactor Power Program. Technical information report ...

  7. EMGeo Case Study

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    methods (QMR in one case, and IDR in the other), both solvers are dominated by memory bandwidth intensive operations like sparse matrix-vector multiply (SpMV), dot...

  8. Publications and Presentations at Scientific Meetings | Stanford...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Giammar, and B.M. Tebo (2008) Indirect UO2 oxidation by Mn(II)-oxidizing spores of Bacillus sp. strain SG-1 and the effect of U and Mn concentrations. Environ. Sci. Technol....

  9. Beta.-glucosidase coding sequences and protein from orpinomyces PC-2

    DOE Patents [OSTI]

    Li, Xin-Liang; Ljungdahl, Lars G.; Chen, Huizhong; Ximenes, Eduardo A.

    2001-02-06

    Provided is a novel .beta.-glucosidase from Orpinomyces sp. PC2, nucleotide sequences encoding the mature protein and the precursor protein, and methods for recombinant production of this .beta.-glucosidase.

  10. Orpinomyces xylanase proteins and coding sequences

    DOE Patents [OSTI]

    Li, X.L.; Ljungdahl, L.G.; Chen, H.

    1998-10-20

    Xylanases having high specific activities from Orpinomyces sp. strain PC-2 are provided as well as methods for their purification. DNA sequences encoding these proteins are also provided. 8 figs.

  11. Spatially separated excitons in 2D and 1D

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Fermi surfaces Low SP tunneling rate between layers Picture credit: Kharitonov et al., Phys. Rev. B 78 Phase coherence between the two layers Transport of excitons can be...

  12. V-151: RSA Archer eGRC Bugs Let Remote Authenticated Users Upload...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    V-151: RSA Archer eGRC Bugs Let Remote Authenticated Users Upload Files and Let Remote ... The vendor has issued a fix (5.3SP1). Addthis Related Articles V-084: RSA Archer eGRC ...

  13. A=7H (1979AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    9AJ01) (Not illustrated) A search for 7H in 7Li(π-, π+)7H was unsuccessful (1965GI10). See also (1975BE31, 1977SP1B; theor.

  14. OAK RIDGE CERCLA DISPOSAL FACILITY ACHIEVES SAFETY MILESTONE...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of fissile material. This SP limits the number of waste packages per exclusive use trailer to 2. This year, approval was received from the Department of Energy (DOE)Oak Ridge...

  15. ARM - Publications: Science Team Meeting Documents

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cross Platform Validation of WAIL at the ARM Southern Great Plains Site Polonsky, I.N., Love, S.P., and Davis, A.B., Los Alamos National Laboratory Fourteenth Atmospheric Radiation...

  16. SREL Reprint #3051

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    tides, terrapins spent more time in the marsh (Spartina sp., mud, and occasional shallow water) than in open water of the creek channel. Terrapins remained within the same tidal...

  17. Bacillus MGA3 aspartokinase II gene

    DOE Patents [OSTI]

    Schendel, Frederick J. (Oakdale, MN); Flickinger, Michael C. (St. Paul, MN)

    1993-01-01

    The present invention provides the isolated DNA sequence encoding the .alpha.B dimer subunit of the lysine-sensitive aspartokinase II isozyme from the thermophilic methylotrophic Bacillus sp. MGA3.

  18. BPA-2015-01782-FOIA Response

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    751-782 1 or by email at jcrnurray@bpa.gov. Sillccrel:. ), H.-.:. ' .ranit L. Murray ) I c:;td Rca lt ySpda l i st bee: Aircraft Services - TC-SP-Hanger M. Stolfus -...

  19. Bonneville Power Administration Overview As of December 1, 2014

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bonneville Power Administration Overview As of August 11, 2015 Grand Coulee Dam High Voltage Transmission Columbia Generating Station Moody's: Aa1Stable S&P: AA-Stable Fitch: AA...

  20. Glossary Glossary

    U.S. Energy Information Administration (EIA) Indexed Site

    calculated in terms of the following for- mula: Deg API 141.5 sp gr60degF 60degF - 131.5 The higher the API gravity, the lighter the compound. Light crudes generally exceed...

  1. Freepower Ltd | Open Energy Information

    Open Energy Info (EERE)

    Name: Freepower Ltd Place: Andover, United Kingdom Zip: SP10 3TY Sector: Renewable Energy Product: Develops a 120kW Organic Rankine Cycle Turbine Generator that uses heat from...

  2. STEAB Teleconference Minutes September 2011

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... EJ, SB and Steve Payne (SP) believe a resolution needs to go to DOE right away in order to ... efficiency in manufacturing to retain jobs; Supporting private sector energy ...

  3. ScottishPower Renewable Energy Holdings | Open Energy Information

    Open Energy Info (EERE)

    ScottishPower Renewable Energy Holdings Jump to: navigation, search Name: ScottishPower Renewable Energy Holdings Place: Glasgow, Scotland, United Kingdom Zip: G2 8SP Sector: Wind...

  4. 2000 User Survey Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    "NERSC has been the most stable supercomputer center in the country particularly with the migration from the T3E to the IBM SP". "Makes supercomputing easy." Below are the survey...

  5. NUREG/CR-6399

    Office of Scientific and Technical Information (OSTI)

    Layout of CVN Specimen in 1--78Sp HB2 Nozzle Dropout (A212B) (Remainder block from manufacture of L-S operational assessment CVN specimens) 12 11 16" I I 4 ' 7 1 4" Dlstance...

  6. Micro-Earthquake At Coso Geothermal Area (1974) | Open Energy...

    Open Energy Info (EERE)

    as many as 100 or more distinct local events; more than two thousand events with S-P times of less than three seconds were detected; observed low value for Poisson's ratio which...

  7. MMA WBF Power LP | Open Energy Information

    Open Energy Info (EERE)

    LP Jump to: navigation, search Name: MMA WBF Power LP -- Bolthouse S&P and Rowen Farms Solar Place: California Phone Number: 415-986-8038 or 800-331-1534 Website:...

  8. Edipower | Open Energy Information

    Open Energy Info (EERE)

    navigation, search Name: Edipower Place: Sesto San Giovanni, Italy Zip: 20099 Product: Italian power producer, 50% owned by Edison SpA. References: Edipower1 This article is a...

  9. This content has been downloaded from IOPscience. Please scroll...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Acciaierie Venete SpA), Corso Stati Uniti 4, 35127 Padova, Italy E-mail: mbmcgarry@wisc.edu Received 2 September 2014, revised 21 October 2014 Accepted for publication 31...

  10. D E -F G 0 2 -1 0 E R 2 6 0 2 1

    Office of Scientific and Technical Information (OSTI)

    ...terialld0&confld5397 9 Sp ecial issue at IEEE C om m u n ication s ab ou t M on itorin g ... P I was an editor for a Special Issue at IEEE Communications, focusing on Monitoring and ...

  11. NUG Meeting February 22, 2001

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    8:45 - 9:30 Walt Polansky Perspectives from Washington 9:30 - 10:30 Bill Kramer Status reports: IBM SP Phase 2 plans, NERSC-4 plans, NERSC-2 decommissioning 10:30 - ... ...

  12. Presentations

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Status reports: IBM SP Phase 2 plans, NERSC-4 plans, NERSC-2 decommissioning February 22, 2001 | Author(s): Bill Kramer | Download File: Kramer.Status.Plans.Feb2001.ppt | ppt | 6.8 ...

  13. Presentations

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Status reports: IBM SP Phase 2 plans, NERSC-4 plans, NERSC-2 decommissioning February 22, 2001 | Author(s): Bill Kramer | Download File: Kramer.Status.Plans.Feb2001.ppt | ppt | 6.8

  14. Agenda

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Perspectives from Washington 9:30 - 10:30 Bill Kramer Status reports: IBM SP Phase 2 plans, NERSC-4 plans, NERSC-2 decommissioning 10:30 - 10:45 Break 10:45 - 11:15 Bill Kramer ...

  15. Microsoft Word - 200812-24_DSI-DraftContract_blackline.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    successor. 8.4.5.7 "S&P" shall mean Standard and Poor's Rating Services (a division of McGraw-Hill, Inc.) or its successor. 9. EMPLOYMENT EXPENDITURES AND CAPITAL INVESTMENT 9.1...

  16. Microsoft Word - 200812-24_DSI-DraftContract_redline.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    successor. 8.4.5.7 "S&P" shall mean Standard and Poor's Rating Services (a division of McGraw-Hill, Inc.) or its successor. 9. EMPLOYMENT EXPENDITURES AND CAPITAL INVESTMENT 9.1...

  17. Microsoft Word - DSI Block 12_05_08.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    successor. 8.4.5.7 "S&P" shall mean Standard and Poor's Rating Services (a division of McGraw-Hill, Inc.) or its successor. 9. EMPLOYMENT EXPENDITURES AND CAPITAL INVESTMENT 9.1...

  18. 07Li

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Li Thermal Neutron Capture Evaluated Data Measurements 1967RA24: 6Li(n, ), E thermal; measured E; deduced Q. 1968SP01: 6Li(n, ), E thermal; measured E, I; deduced Q....

  19. 20F

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Thermal Neutron Capture Evaluated Data Measurements 1967RA24: 19F(n, ), E thermal; measured E; deduced Q. 1968SP01: 19F(n, ), E thermal; measured E, I; deduced Q. 20F...

  20. 13C

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    C Thermal Neutron Capture Evaluated Data Measurements 1967RA24: 12C(n, ), E thermal; measured E; deduced Q. 1968SP01: 12C(n, ), E thermal; measured E, I; deduced Q....

  1. Microsoft Word - Final 2012 Prepayment RFO Template as Amended...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    or any official statement as to a possible downgrading, suspension or withdrawal of any rating by Moody's, S&P or Fitch of the Bonds, or debt instruments of a character and...

  2. This Week In Petroleum Printer-Friendly Version

    Gasoline and Diesel Fuel Update (EIA)

    Release on July 17, 2002) Are Stocks Going Up or Down? No, were not talking about the stock market (e.g., the Dow, NASDAQ, or the S&P). Theres no question as to which way...

  3. Site planning and integration fiscal year 1999 multi-year work plan (MYWP) update for WBS 1.8.2.1

    SciTech Connect (OSTI)

    SCHULTZ, E.A.

    1998-10-01

    The primary mission of the Site Planning and Integration (SP and I) project is to assist Fluor Daniel Project Direction to ensure that all work performed under the Project Hanford Management Contract (PHMC) is adequately planned, executed, controlled, and that performance is measured and reported in an integrated fashion. Furthermore, SP and I is responsible for the development, implementation, and management of systems and processes that integrate technical, schedule, and cost baselines for PHMC work.

  4. SREL Reprint #3256

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6 Siren sp. Predation Thomas M. Luhring1,2, J. Whitfield Gibbons1, and Parker W. Gibbons1 1Savannah River Ecology Laboratory, Drawer E, Aiken, SC 29802, USA 2University of Missouri, Division of Biological Sciences, 105 Tucker Hall, Columbia, MO 65211, USA Abstract: The first confirmed observation of a Barred Owl depredating a sirenid. SREL Reprint #3256 Luhring, T. M., J. W. Gibbons, and P. W. Gibbons. 2013. Siren sp. Predation. Herpetological Review 44(3): 491-49

  5. Advanced High-Strength Steel Stamping | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    High-Strength Steel Stamping Advanced High-Strength Steel Stamping 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting PDF icon lm063_hsiung_2012_o.pdf More Documents & Publications AHSS Stamping Project … A/SP 050; Nonlinear Strain Paths Project … A/SP 061 FY 2008 Progress Report for Lightweighting Materials - 5. Automotive Metals-Steel 2011 Annual Progress Report for Lightweighting Materials

  6. Nonlinear Strain Paths | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Nonlinear Strain Paths Nonlinear Strain Paths 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting PDF icon lm064_stoughton_2012_o.pdf More Documents & Publications AHSS Stamping Project … A/SP 050; Nonlinear Strain Paths Project … A/SP 061 FY 2009 Progress Report for Lightweighting Materials - 2. Automotive Metals - Wrought FY 2008 Progress Report for Lightweighting Materials - 2. Automotive Metals-Wrought

  7. Convection feedbacks in a super-parameterization GCM

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Convection feedbacks in a super-parameterization GCM Luo, Zhengzhao (Johnny) Colorado State University Stephens, Graeme Colorado State University Category: Modeling Both the Colorado State University (CSU) and Goddard super-parameterization GCM (SP-GCM) simulate a super-active Asian summer monsoon with unrealistically enhanced levels of precipitation. The underlying physical mechanism for this monsoon bias in the CSU SP-GCM is shown to involve enhanced convection-wind-evaporation feedbacks. The

  8. January 2013 Most Viewed Documents for Power Generation And Distribution |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    OSTI, US Dept of Energy, Office of Scientific and Technical Information January 2013 Most Viewed Documents for Power Generation And Distribution Lessons from Large-Scale Renewable Energy Integration Studies: Preprint Bird, L.; Milligan, M. Small punch creep test: A promising methodology for high temperature plant components life evaluation Tettamanti, S. [CISE SpA, Milan (Italy)]; Crudeli, R. [ENEL SpA, Milan (Italy)] Failure analyses and weld repair of boiler feed water pumps Vulpen, R. van

  9. Landscape NERSC template

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NATIONAL ENERGY RESEARCH SCIENTIFIC COMPUTING CENTER 1 A Comparison of Performance Analysis Tools on the NERSC SP Jonathan Carter NERSC User Services NATIONAL ENERGY RESEARCH SCIENTIFIC COMPUTING CENTER 2 Performance Tools on the IBM SP * PE Benchmarker - IBM PSSP - Trace and visualize hardware counters values or MPI and user-defined events * Paraver - European Center for Parallelism at Barcelona (CEPBA) - Trace and visualize program states, hardware counters values, and MPI and user-defined

  10. DOE SES PERFORMANCE MANAGEMENT | Department of Energy

    Office of Environmental Management (EM)

    DOE SES PERFORMANCE MANAGEMENT DOE SES PERFORMANCE MANAGEMENT This covers Department of Energy SES executives, as well as those Presidential appointees who have retained eligibility for SES performance appraisals and awards under 5 U.S.C. 3392(c). Documents Available for Download November 10, 2015 FY 2016 SENIOR EXECUTIVE SERVICE (SES) AND SENIOR PROFESSIONAL (SP) PERFORMANCE APPRAISAL OPENING GUIDANCE FY 2016 performance appraisal cycle for both SES and SP members, which includes Senior Level

  11. Relationship between the structure and electrical characteristics of diamond-like carbon films

    SciTech Connect (OSTI)

    Takabayashi, Susumu Otsuji, Taiichi; Yang, Meng; Ogawa, Shuichi; Hayashi, Hiroyuki; Jeko, Radek; Takakuwa, Yuji

    2014-09-07

    To elucidate the relationship between the structure and the electrical characteristics of diamond-like carbon (DLC) films, DLC films were synthesized in a well-controlled glow discharge with the aid of photoelectrons in an argon/methane atmosphere. The dielectric constant and breakdown strength of the films exhibited opposite behaviors, depending on the total pressure during the synthesis. The product of these two values decreased monotonically as the pressure increased. The Raman spectra were analyzed with a Voigt-type formula. Based on the results, the authors propose the sp{sup 2} cluster model for the DLC structure. This model consists of conductive clusters of sp{sup 2} carbons surrounded by a dielectric matrix sea of sp{sup 2} carbon, sp{sup 3} carbon, and hydrogen, and indicates that the dielectric constant of the whole DLC film is determined by the balance between the dielectric constant of the matrix and the total size of the clusters, while the breakdown strength is determined by the reciprocal of the cluster size. The model suggests that a high-? DLC film can be synthesized at a middle pressure and consists of well-grown sp{sup 2} clusters and a dense matrix. A low-? DLC film can be synthesized both at low and high pressures. The sp{sup 2} cluster model explains that a low-? DLC film synthesized at low pressure consists of a dense matrix and a low density of sp{sup 2} clusters, and exhibits a high breakdown strength. On the other hand, a low-? film synthesized at high pressure consists of a coarse matrix and a high density of clusters and exhibits a low breakdown strength.

  12. Secondary production of benthic insects in three cold-desert streams

    SciTech Connect (OSTI)

    Gaines, W.L.

    1987-07-01

    Aquatic insect production was studied in three cold-desert streams in eastern Washington (Douglas Creek, Snively Springs, and Rattlesnake Springs). The size-frequency method was applied to individual taxa to estimate total insect production. production was also assessed for functional groups and trophic levels in each stream. Optioservus sp. (riffle beetles) and Baetis sp. (mayflies) accounted for 72% of the total insect numbers and 50% of the total biomass in Douglas Creek. Baetis sp. accounted for 42% of the total insect numbers and 25% of the total biomass in Snively Springs. Simulium sp. (blackflies) and Baetis sp. comprised 74% of the total insect numbers and 55% of the total biomass in Rattlesnake Springs. Grazer-scrapers (49%) and collectors (48%) were the most abundant functional groups in Douglas Creek. Collectors were the most abundant functional group in Snively Springs and Rattlesnake Springs. Herbivores and detritivores were the most abundant trophic level in Snively Springs and Rattlesnake Springs. Dipterans (midges and blackflies) were the most productive taxa within the study streams, accounting for 40% to 70% of the total community production. Production by collectors and detritivores was the highest of all functional groups and trophic levels in all study streams.

  13. Nuclear safety for the space exploration initiative. Final report

    SciTech Connect (OSTI)

    Dix, T.E.

    1991-11-01

    The results of a study to identify potential hazards arising from nuclear reactor power systems for use on the lunar and Martian surfaces, related safety issues, and resolutions of such issues by system design changes, operating procedures, and other means are presented. All safety aspects of nuclear reactor power systems from prelaunch ground handling to eventual disposal were examined consistent with the level of detail for SP-100 reactor design at the 1988 System Design Review and for launch vehicle and space transport vehicle designs and mission descriptions as defined in the 90-day Space Exploration Initiative (SEI) study. Information from previous aerospace nuclear safety studies was used where appropriate. Safety requirements for the SP-100 space nuclear reactor system were compiled. Mission profiles were defined with emphasis on activities after low earth orbit insertion. Accident scenarios were then qualitatively defined for each mission phase. Safety issues were identified for all mission phases with the aid of simplified event trees. Safety issue resolution approaches of the SP-100 program were compiled. Resolution approaches for those safety issues not covered by the SP-100 program were identified. Additionally, the resolution approaches of the SP-100 program were examined in light of the moon and Mars missions.

  14. Performance analysis of distributed symmetric sparse matrix vector multiplication algorithm for multi-core architectures. Analysis of Distributed Sparse Symmetric Algorithm

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Oryspayev, Dossay; Aktulga, Hasan Metin; Sosonkina, Masha; Maris, Pieter; Vary, James P.

    2015-07-14

    Sparse matrix vector multiply (SpMVM) is an important kernel that frequently arises in high performance computing applications. Due to its low arithmetic intensity, several approaches have been proposed in literature to improve its scalability and efficiency in large scale computations. In this paper, our target systems are high end multi-core architectures and we use messaging passing interface + open multiprocessing hybrid programming model for parallelism. We analyze the performance of recently proposed implementation of the distributed symmetric SpMVM, originally developed for large sparse symmetric matrices arising in ab initio nuclear structure calculations. We also study important features of this implementationmoreand compare with previously reported implementations that do not exploit underlying symmetry. Our SpMVM implementations leverage the hybrid paradigm to efficiently overlap expensive communications with computations. Our main comparison criterion is the CPU core hours metric, which is the main measure of resource usage on supercomputers. We analyze the effects of topology-aware mapping heuristic using simplified network load model. Furthermore, we have tested the different SpMVM implementations on two large clusters with 3D Torus and Dragonfly topology. Our results show that the distributed SpMVM implementation that exploits matrix symmetry and hides communication yields the best value for the CPU core hours metric and significantly reduces data movement overheads.less

  15. CSTI high capacity power

    SciTech Connect (OSTI)

    Winter, J.M.

    1994-09-01

    The SP-100 program was established in 1983 by DOD, DOE, and NASA as a joint program to develop the technology necessary for space nuclear power systems for military and civil application. During FY86 and 87, the NASA SP-100 Advanced Technology Program was devised to maintain the momentum of promising technology advancement efforts started during Phase I of SP-100 and to strengthen, in key areas, the chances for successful development and growth capability of space nuclear reactor power systems for future space applications. In FY88, the Advanced Technology Program was incorporated into NASA`s new Civil Space Technology Initiative (CSTI). The CSTI Program was established to provide the foundation for technology development in automation and robotics, information, propulsion, and power. The CSTI High Capacity Power Program builds on the technology efforts of the SP-100 program, incorporates the previous NASA SP-100 Advanced Technology project, and provides a bridge to NASA Project Pathfinder. The elements of CSTI High Capacity Power development include Conversion Systems, Thermal Management, Power Management, System Diagnostics, and Environmental Interactions. Technology advancement in all areas, including materials, is required to assure the high reliability and 7 to 10 year lifetime demanded for future space nuclear power systems. The overall program will develop and demonstrate the technology base required to provide a wide range of modular power systems as well as allowing mission independence from solar and orbital attitude requirements. Several recent advancements in CSTI High Capacity power development will be discussed.

  16. Performance analysis of distributed symmetric sparse matrix vector multiplication algorithm for multi-core architectures

    SciTech Connect (OSTI)

    Oryspayev, Dossay; Aktulga, Hasan Metin; Sosonkina, Masha; Maris, Pieter; Vary, James P.

    2015-07-14

    In this article, sparse matrix vector multiply (SpMVM) is an important kernel that frequently arises in high performance computing applications. Due to its low arithmetic intensity, several approaches have been proposed in literature to improve its scalability and efficiency in large scale computations. In this paper, our target systems are high end multi-core architectures and we use messaging passing interface + open multiprocessing hybrid programming model for parallelism. We analyze the performance of recently proposed implementation of the distributed symmetric SpMVM, originally developed for large sparse symmetric matrices arising in ab initio nuclear structure calculations. We also study important features of this implementation and compare with previously reported implementations that do not exploit underlying symmetry. Our SpMVM implementations leverage the hybrid paradigm to efficiently overlap expensive communications with computations. Our main comparison criterion is the "CPU core hours" metric, which is the main measure of resource usage on supercomputers. We analyze the effects of topology-aware mapping heuristic using simplified network load model. Furthermore, we have tested the different SpMVM implementations on two large clusters with 3D Torus and Dragonfly topology. Our results show that the distributed SpMVM implementation that exploits matrix symmetry and hides communication yields the best value for the "CPU core hours" metric and significantly reduces data movement overheads.

  17. Nodal surfaces and interdimensional degeneracies

    SciTech Connect (OSTI)

    Loos, Pierre-Franois; Bressanini, Dario

    2015-06-07

    The aim of this paper is to shed light on the topology and properties of the nodes (i.e., the zeros of the wave function) in electronic systems. Using the electrons on a sphere model, we study the nodes of two-, three-, and four-electron systems in various ferromagnetic configurations (sp, p{sup 2}, sd, pd, p{sup 3}, sp{sup 2}, and sp{sup 3}). In some particular cases (sp, p{sup 2}, sd, pd, and p{sup 3}), we rigorously prove that the non-interacting wave function has the same nodes as the exact (yet unknown) wave function. The number of atomic and molecular systems for which the exact nodes are known analytically is very limited and we show here that this peculiar feature can be attributed to interdimensional degeneracies. Although we have not been able to prove it rigorously, we conjecture that the nodes of the non-interacting wave function for the sp{sup 3} configuration are exact.

  18. Performance analysis of distributed symmetric sparse matrix vector multiplication algorithm for multi-core architectures

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Oryspayev, Dossay; Aktulga, Hasan Metin; Sosonkina, Masha; Maris, Pieter; Vary, James P.

    2015-07-14

    In this article, sparse matrix vector multiply (SpMVM) is an important kernel that frequently arises in high performance computing applications. Due to its low arithmetic intensity, several approaches have been proposed in literature to improve its scalability and efficiency in large scale computations. In this paper, our target systems are high end multi-core architectures and we use messaging passing interface + open multiprocessing hybrid programming model for parallelism. We analyze the performance of recently proposed implementation of the distributed symmetric SpMVM, originally developed for large sparse symmetric matrices arising in ab initio nuclear structure calculations. We also study important featuresmore » of this implementation and compare with previously reported implementations that do not exploit underlying symmetry. Our SpMVM implementations leverage the hybrid paradigm to efficiently overlap expensive communications with computations. Our main comparison criterion is the "CPU core hours" metric, which is the main measure of resource usage on supercomputers. We analyze the effects of topology-aware mapping heuristic using simplified network load model. Furthermore, we have tested the different SpMVM implementations on two large clusters with 3D Torus and Dragonfly topology. Our results show that the distributed SpMVM implementation that exploits matrix symmetry and hides communication yields the best value for the "CPU core hours" metric and significantly reduces data movement overheads.« less

  19. The semi-empirical tight-binding model for carbon allotropes between diamond and graphite

    SciTech Connect (OSTI)

    Lytovchenko, V.; Kurchak, A.; Strikha, M.

    2014-06-28

    The new carbon allotropes between diamond and graphite have come under intensive examination during the last decade due to their numerous technical applications. The modification of energy gap in thin films of these allotropes was studied experimentally using optical methods. The proposed simple model of carbon clusters with variable lengths of chemical bonds allows us to imitate the transfer from diamond and diamond-like to graphite-like structures, as well as the corresponding modification of hybridization sp{sup 3}/sp{sup 2} for diamond-like and sp{sub z} for graphite-like phases. This enables us to estimate various allotropes parameters, like the gap E{sub g}, energies of valence E{sub v}, and conduction E{sub c} band edges, and the value of electronic affinity, i.e., optical work function X, which are all of practical importance. The obtained estimations correspond to the experimental data.

  20. Nano-hillock formation in diamond-like carbon induced by swift heavy projectiles in the electronic stopping regime: Experiments and atomistic simulations

    SciTech Connect (OSTI)

    Schwen, D.; Bringa, E.; Krauser, J.; Weidinger, A.; Trautmann, C.; Hofsaess, H.

    2012-09-10

    The formation of surface hillocks in diamond-like carbon is studied experimentally and by means of large-scale molecular dynamics simulations with 5 Multiplication-Sign 10{sup 6} atoms combined with a thermal spike model. The irradiation experiments with swift heavy ions cover a large electronic stopping range between {approx}12 and 72 keV/nm. Both experiments and simulations show that beyond a stopping power threshold, the hillock height increases linearly with the electronic stopping, and agree extremely well assuming an efficiency of approximately 20% in the transfer of electronic energy to the lattice. The simulations also show a transition of sp{sup 3} to sp{sup 2} bonding along the tracks with the hillocks containing almost no sp{sup 3} contribution.

  1. Field Emission and Nanostructure of Carbon Films

    SciTech Connect (OSTI)

    Merkulov, V.I.; Lowndes, D.H.; Baylor, L.R.

    1999-11-29

    The results of field emission measurements of various forms of carbon films are reported. It is shown that the films nanostructure is a crucial factor determining the field emission properties. In particular, smooth, pulsed-laser deposited amorphous carbon films with both high and low sp3 contents are poor field emitters. This is similar to the results obtained for smooth nanocrystalline, sp2-bonded carbon films. In contrast, carbon films prepared by hot-filament chemical vapor deposition (HE-CVD) exhibit very good field emission properties, including low emission turn-on fields, high emission site density, and excellent durability. HF-CVD carbon films were found to be predominantly sp2-bonded. However, surface morphology studies show that these films are thoroughly nanostructured, which is believed to be responsible for their promising field emission properties.

  2. TEM characterization of nanodiamond thin films.

    SciTech Connect (OSTI)

    Qin, L.-C.; Zhou, D.; Krauss, A. R.; Gruen, D. M.; Chemistry

    1998-05-01

    The microstructure of thin films grown by microwave plasma-enhanced chemical vapor deposition (MPCVD) from fullerene C{sub 60} precursors has been characterized by scanning electron microscopy (SEM), selected-area electron diffraction (SAED), bright-field electron microscopy, high-resolution electron microscopy (HREM), and parallel electron energy loss spectroscopy (PEELS). The films are composed of nanosize crystallites of diamond, and no graphitic or amorphous phases were observed. The diamond crystallite size measured from lattice images shows that most grains range between 3-5 nm, reflecting a gamma distribution. SAED gave no evidence of either sp2-bonded glassy carbon or sp3-bonded diamondlike amorphous carbon. The sp2-bonded configuration found in PEELS was attributed to grain boundary carbon atoms, which constitute 5-10% of the total. Occasionally observed larger diamond grains tend to be highly faulted.

  3. heat_ghc02

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2 3 4 5 6 7 8 0 2 4 6 8 10 20 30 40 50 60 70 Expansion Level Calculation Time (sec) IBM SP ∇∇∇ L=2, 64PE oooo L=2, 16PE ***** L=1, 64PE xxxx L=1, 16PE (a) 0 2 4 6 8 0.2 0.4 0.6 0.8 1 1.2 Expansion Level Calculation Slowdown IBM SP ∇∇∇ L=2, 64PE oooo L=2, 16PE ***** L=1, 64PE xxxx L=1, 16PE 0 2 4 6 8 0 5 10 15 20 25 Expansion Level Communication Time (sec) IBM SP ∇∇∇ L=2, 64PE ***** L=1, 64PE oooo L=2, 16PE xxxx L=1, 16PE (b) 0 2 4 6 8 1 1.5 2 2.5 3 Expansion Level

  4. Status of Activities to Implement a Sustainable System of MC&A Equipment and Methodological Support at Rosatom Facilities

    SciTech Connect (OSTI)

    J.D. Sanders

    2010-07-01

    Under the U.S.-Russian Material Protection, Control and Accounting (MPC&A) Program, the Material Control and Accounting Measurements (MCAM) Project has supported a joint U.S.-Russian effort to coordinate improvements of the Russian MC&A measurement system. These efforts have resulted in the development of a MC&A Equipment and Methodological Support (MEMS) Strategic Plan (SP), developed by the Russian MEM Working Group. The MEMS SP covers implementation of MC&A measurement equipment, as well as the development, attestation and implementation of measurement methodologies and reference materials at the facility and industry levels. This paper provides an overview of the activities conducted under the MEMS SP, as well as a status on current efforts to develop reference materials, implement destructive and nondestructive assay measurement methodologies, and implement sample exchange, scrap and holdup measurement programs across Russian nuclear facilities.

  5. Low-energy D{sup +} and H{sup +} ion irradiation effects on highly oriented pyrolytic graphite

    SciTech Connect (OSTI)

    Kue Park, Jun; Won Lee, Kyu; Hee Han, Jun; Jung Kweon, Jin; Kim, Dowan; Eui Lee, Cheol [Department of Physics and Institute for Nano Science, Korea University, Seoul 136-713 (Korea, Republic of)] [Department of Physics and Institute for Nano Science, Korea University, Seoul 136-713 (Korea, Republic of); Lim, Sun-Taek; Kim, Gon-Ho [Department of Nuclear Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of)] [Department of Nuclear Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of); Noh, S. J.; Kim, H. S. [Department of Applied Physics, Dankook University, Yongin 448-701 (Korea, Republic of)] [Department of Applied Physics, Dankook University, Yongin 448-701 (Korea, Republic of)

    2013-12-07

    We have investigated the low-energy (100 eV) D{sup +} and H{sup +} ion irradiation effects on the structural and chemical properties of highly oriented pyrolytic graphite (HOPG). Structural disorder due to the ion irradiation was identified by the Raman spectroscopy, the D{sup +} irradiation giving rise to greater structural disorder than the H{sup +} irradiation. Only sp{sup 2} bonding was identified in the X-ray photoemission spectroscopy of the D{sup +}-irradiated HOPG, indicating no change in the surface chemical structure. The H{sup +} irradiation, on the other hand, gave rise to sp{sup 3} bonding and ???{sup *} transition, the sp{sup 3} bonding increasing with increasing irradiation dose. It is thus shown that the chemical properties of the HOPG surface may be sensitively modified by the low-energy H{sup +} ion irradiation, but not by the low-energy D{sup +} ion irradiation.

  6. Unidirectional anisotropy in the spin pumping voltage in yttrium iron garnet/platinum bilayers

    SciTech Connect (OSTI)

    Vilela-Leao, L. H.; Salvador, C.; Azevedo, A.; Rezende, S. M.

    2011-09-05

    Detailed measurements of the dc voltage generated in a thin Pt layer deposited on films of yttrium iron garnet (YIG) have been carried out to study the spin pumping effect produced by magnetostatic (MS) modes excited by a microwave field. In relatively thick YIG films the modes are far apart so that one can identify clearly the spin pumping voltage in V{sub SP} produced by each MS mode. We have discovered that when the sputter deposition of the thin Pt layer is made on the YIG film magnetized by a static magnetic field, V{sub SP} exhibits a strong unidirectional anisotropy.

  7. STRUCTURAL STUDIES on SINGLE PARTICLES and BIOMOLECULES

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Chavarha, L.E. Schulwitz Jr., K. Kumar, R.W. Loney, H. Khoojinian, S.C. Biswas, S.B. Rananavare, S.B. Hall Oregon Health & Science Univ.; Portland State Univ., Portland, OR Pulmonary surfactant lowers surface tension in the alveoli of the lungs, preventing alveolar collapse and maintaining bronchial functionality. Two essential hydrophobic proteins, SP-B & SP-C, promote rapid adsorption by the surfactant lipids to the air/water interface. Structural Effects of the Hydrophobic Surfactant

  8. Laser induced popcornlike conformational transition of nanodiamond as a nanoknife

    SciTech Connect (OSTI)

    Chang, C.-C.; Chen, P.-H.; Chu, H.-L.; Lee, T.-C.; Chou, C.-C.; Chao, J.-I; Su, C.-Y.; Chen, J.S.; Tsai, J.-S.; Tsai, C.-M.; Ho, Y.-P.; Sun, K.W.; Cheng, C.-L.; Chen, F.-R.

    2008-07-21

    Nanodiamond (ND) is surrounded by layers of graphite on its surface. This unique structure feature creates unusual fluorescence spectra, which can be used as an indicator to monitor its surface modification. Meanwhile, the impurity, nitroso (C-N=O) inside the ND can be photolyzed by two-photon absorption, releasing NO to facilitate the formation of a sp{sup 3} diamond structure in the core of ND and transforming it into a sp{sup 2} graphite structure. Such a conformational transition enlarges the size of ND from 8 to 90 nm, resulting in a popcornlike structure. This transition reaction may be useful as nanoknives in biomedical application.

  9. Evidence for hybrid surface metallic band in (4??4) silicene on Ag(111)

    SciTech Connect (OSTI)

    Tsoutsou, D. Xenogiannopoulou, E.; Golias, E.; Tsipas, P.; Dimoulas, A.

    2013-12-02

    The electronic band structure of monolayer (4??4) silicene on Ag(111) is imaged by angle resolved photoelectron spectroscopy. A dominant hybrid surface metallic band is observed to be located near the bulk Ag sp-band which is also faintly visible. The two-dimensional character of the hybrid band has been distinguished against the bulk character of the Ag(111) sp-band by means of photon energy dependence experiments. The surface band exhibits a steep linear dispersion around the K{sup }{sub Ag} point and has a saddle point near the M{sup }{sub Ag} point of Ag(111) resembling the ?-band dispersion in graphene.

  10. Slide 1

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    19:08 19:10 19:12 100 80 60 40 20 0 b sp , Mm -1 1.5 1.0 0.5 0.0 LWC, gm m -3 Org < 60 Sulfate Nitrate Cl bspgreen LWCGerber CVI IsoK Preliminary Observations from the June 15...

  11. Fuels and Chemicals from Lignocellulosic Biomass: Valorization...

    Office of Scientific and Technical Information (OSTI)

    ... Ml 190 <0 0.25 1.2 S. coelicolor Ml45 <0 <0 0.5 S. avermitilis 41443 DSM <0 <0 4.6 Bacteria Pseudomonas putida 33015 <0 1.1 <0 Rhodococcus erythropolis 68.9 l.l 1.5 Rhodococcus sp. ...

  12. Richland Operations Office Cleanup Strategy, Scope

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    IU Is ol at ed Un it RO D Re co rd of De ci si on TS D Tr ea tm en t, St or ag e, Di sp os al K A re a K Ea st Ba si n De m ol ish ed In te rim Sa fe St or ag e of K ...

  13. The AmAzing Journey of Columbia River Salmon B O N N E V I L

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2 WAiTing To hATch 1 reneWing The cycLe 10 reTurn ing To spAWning grounds 9 cLimbing fish LAdders 8 sWimming upsTreAm 7 Living in The oceAn 6 yolk sac redd alevin 3 Five...

  14. Uptake of donor lymphocytes treated with 8-methoxypsoralen and ultraviolet A light by recipient dendritic cells induces CD4{sup +}CD25{sup +}Foxp3{sup +} regulatory T cells and down-regulates cardiac allograft rejection

    SciTech Connect (OSTI)

    Zheng, De-Hua; Dou, Li-Ping; Wei, Yu-Xiang; Du, Guo-Sheng; Zou, Yi-Ping; Song, Ji-Yong; Zhu, Zhi-Dong; Cai, Ming; Qian, Ye-Yong; Shi, Bing-Yi

    2010-05-14

    Extracorporeal photopheresis (ECP) is an effective immunomodulatory therapy and has been demonstrated to be beneficial for graft-vs-host disease and solid-organ allograft rejection. ECP involves reinfusion of a patient's autologous peripheral blood leukocytes treated ex vivo with 8-methoxypsoralen and UVA light radiation (PUVA). Previous studies focused only on ECP treatment of recipient immune cells. Our study is the first to extend the target of ECP treatment to donor immune cells. The results of in vitro co-culture experiments demonstrate uptake of donor PUVA-treated splenic lymphocytes (PUVA-SPs) by recipient immature dendritic cells (DCs). Phagocytosis of donor PUVA-SPs does not stimulate phenotype maturation of recipient DCs. In the same co-culture system, donor PUVA-SPs enhanced production of interleukin-10 and interferon-{gamma} by recipient DCs and impaired the subsequent capability of recipient DCs to stimulate recipient naive T cells. Phagocytosis of donor PUVA-SP (PUVA-SP DCs) by recipient DCs shifted T-cell responses in favor of T helper 2 cells. Infusion of PUVA-SP DCs inhibited cardiac allograft rejection in an antigen-specific manner and induced CD4{sup +}CD25{sup high}Foxp3{sup +} regulatory T cells. In conclusion, PUVA-SP DCs simultaneously deliver the donor antigen and the regulatory signal to the transplant recipient, and thus can be used to develop a novel DC vaccine for negative immune regulation and immune tolerance induction.

  15. T-659: Update support for RSA Authentication Manager

    Broader source: Energy.gov [DOE]

    RSA posted SP4 Patch 4 of their Authentication Manager product 06/30/2011. There are a few pages of fixes in the README, but the most significant is that Authentication Manager can now be installed on Windows Server 2008 (both 32 and 64bit).

  16. EM Corporate QA Performance Metrics | Department of Energy

    Energy Savers [EERE]

    Corporate QA Performance Metrics EM Corporate QA Performance Metrics Quality Program Criteria Summary PDF icon EM Corporate QA Performance Metrics More Documents & Publications QA Corporate Board Meeting - November 2008 Instructions for EM Corporate Performance Metrics FY 2015 SENIOR EXECUTIVE SERVICE (SES) AND SENIOR PROFESSIONAL (SP) PERFORMANCE APPRAISAL CYCLE - CLOSEOUT GUIDANCE

  17. Office of Executive Resources Office of the Chief Human Capital Officer

    Office of Environmental Management (EM)

    Office of Executive Resources Office of the Chief Human Capital Officer U.S. Department of Energy FY 2014 Senior Executive Service (SES) and Senior Professional (SP) Performance Appraisal Closeout Guidance 2 Table of Contents I. FY 2014 PERFORMANCE APPRAISAL CYCLE BUSINESS RULES ............................................................................. 3 ASSESSING PERFORMANCE

  18. 11B Cross Section

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1B(p, X) (Current as of 12172015) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2004RO27, 2004SP03 11B(p, ): deduced , S-factor Ecm 0 - 1 X4 11072012...

  19. Total synthesis of gracilioether F. Development and application of Lewis acid promoted ketenealkene [2+2] cycloadditions and late-stage CH oxidation

    SciTech Connect (OSTI)

    Rasik, Christopher M.; Brown, M. Kevin

    2014-12-22

    The first synthesis of gracilioether F, a polyketide natural product with an unusual tricyclic core and five contiguous stereocenters, is described. Key steps of the synthesis include a Lewis acid promoted ketenealkene [2+2] cycloaddition and a late-stage carboxylic acid directed C(sp)H oxidation. The synthesis requires only eight steps from norbornadiene.

  20. Hanford site transuranic waste sampling plan

    SciTech Connect (OSTI)

    GREAGER, T.M.

    1999-05-13

    This sampling plan (SP) describes the selection of containers for sampling of homogeneous solids and soil/gravel and for visual examination of transuranic and mixed transuranic (collectively referred to as TRU) waste generated at the U.S. Department of Energy (DOE) Hanford Site. The activities described in this SP will be conducted under the Hanford Site TRU Waste Certification Program. This SP is designed to meet the requirements of the Transuranic Waste Characterization Quality Assurance Program Plan (CAO-94-1010) (DOE 1996a) (QAPP), site-specific implementation of which is described in the Hanford Site Transuranic Waste Characterization Program Quality Assurance Project Plan (HNF-2599) (Hanford 1998b) (QAPP). The QAPP defines the quality assurance (QA) requirements and protocols for TRU waste characterization activities at the Hanford Site. In addition, the QAPP identifies responsible organizations, describes required program activities, outlines sampling and analysis strategies, and identifies procedures for characterization activities. The QAPP identifies specific requirements for TRU waste sampling plans. Table 1-1 presents these requirements and indicates sections in this SP where these requirements are addressed.

  1. The new role of scientists

    ScienceCinema (OSTI)

    None

    2011-04-25

    Le D.G. Jentschke fait l'introduction et présente le Prof.Kowarsky, spécialiste en microbiologie, physique nucléaire et une des fondateurs du Cern. Il parle entre autre de l'énergie nucléaire (pacifique)et de remise en questions des valeurs scientifiques et techniques

  2. Office of Executive Resources Office of the Chief Human Capital Officer

    Energy Savers [EERE]

    Office of Executive Resources Office of the Chief Human Capital Officer U.S. Department of Energy FY 2015 Senior Executive Service (SES) and Senior Professional (SP) Performance Appraisal Closeout Guidance 2 Table of Contents I. FY 2015 PERFORMANCE APPRAISAL CYCLE BUSINESS RULES ............................................................................. 3 ASSESSING PERFORMANCE

  3. Double layer capacitor prospects look good

    SciTech Connect (OSTI)

    1995-07-01

    The Fourth International Seminar in Double Layer Capacitors and similar energy devices has been sponsored again by Dr. S.P. Wolsky and Dr. Nikola Marincic. The seminar was held in December 1994, at Deerfield Beach, FL. This report provides a brief description of information on supercapacitors.

  4. Project Hanford management contract quality assurance program implementation plan for nuclear facilities

    SciTech Connect (OSTI)

    Bibb, E.K.

    1997-10-15

    During transition from the Westinghouse Hanford Company (WHC) Management and Operations (M and O) contract to the Fluor Daniel Hanford (FDH) Management and Integration (M and I) contract, existing WHC policies, procedures, and manuals were reviewed to determine which to adopt on an interim basis. Both WHC-SP-1131,Hanford Quality Assurance Program and Implementation Plan, and WHC-CM-4-2, Quality Assurance Manual, were adopted; however, it was recognized that revisions were required to address the functions and responsibilities of the Project Hanford Management Contract (PHMC). This Quality Assurance Program Implementation Plan for Nuclear Facilities (HNF-SP-1228) supersedes the implementation portion of WHC-SP-1 13 1, Rev. 1. The revised Quality Assurance (QA) Program is documented in the Project Hanford Quality Assurance Program Description (QAPD), HNF-MP-599. That document replaces the QA Program in WHC-SP-1131, Rev. 1. The scope of this document is limited to documenting the nuclear facilities managed by FDH and its Major Subcontractors (MSCS) and the status of the implementation of 10 CFR 830.120, Quality Assurance Requirements, at those facilities. Since the QA Program for the nuclear facilities is now documented in the QAPD, future updates of the information provided in this plan will be by letter. The layout of this plan is similar to that of WHC-SP-1 13 1, Rev. 1. Sections 2.0 and 3.0 provide an overview of the Project Hanford QA Program. A list of Project Hanford nuclear facilities is provided in Section 4.0. Section 5.0 provides the status of facility compliance to 10 CFR 830.120. Sections 6.0, 7.0, and 8.0 provide requested exemptions, status of open items, and references, respectively. The four appendices correspond to the four projects that comprise Project Hanford.

  5. Thermally stable crystalline mesoporous metal oxides with substantially uniform pores

    DOE Patents [OSTI]

    Wiesner, Ulrich; Orilall, Mahendra Christopher; Lee, Jinwoo; DiSalvo, Jr., Francis J

    2015-01-27

    Highly crystalline metal oxide-carbon composites, as precursors to thermally stable mesoporous metal oxides, are coated with a layer of amorphous carbon. Using a `one-pot` method, highly crystalline metal oxide-carbon composites are converted to thermally stable mesoporous metal oxides, having highly crystalline mesopore walls, without causing the concomitant collapse of the mesostructure. The `one-pot` method uses block copolymers with an sp or sp 2 hybridized carbon containing hydrophobic block as structure directing agents which converts to a sturdy, amorphous carbon material under appropriate heating conditions, providing an in-situ rigid support which maintains the pores of the oxides intact while crystallizing at temperatures as high as 1000 deg C. A highly crystalline metal oxide-carbon composite can be heated to produce a thermally stable mesoporous metal oxide consisting of a single polymorph.

  6. Evaluation of the reliability of a conventional platform installed in South Pass Block 47 of the Mississippi River delta

    SciTech Connect (OSTI)

    Bea, R.G.

    1996-12-31

    In August 1995, the Energy Development Corporation (EDC) installed a conventional drilling and production platform in South Pass Block 47 (SP 47). Due to its proximity to the delta of the Mississippi River, this platform will be subject to the environmental forces developed by hurricanes and movements of the sea floor. This paper summarizes results from probability based study of the reliability characteristics of a conventional platform installed in SP 47. Bases for evaluation of the acceptability of the reliability of the platform are developed. This paper shows how reliability methods can be used to help improve the efficiency of offshore platforms. Application of traditional engineering approaches indicated the need for a mudslide resistant platform. Given that a mudslide resistant platform was required, then the gas reserves could not have been developed.

  7. Overview of free-piston Stirling technology at the NASA Lewis Research Center

    SciTech Connect (OSTI)

    Slaby, J.G.

    1985-01-01

    The activities include: (1) a generic free-piston Stirling technology project being conducted to develop technologies synergistic to both space power and terrestrial heat pump applications in a cooperative, cost-shared effort with the Department of Energy (DOE/Oak Ridge National Laboratory (ORNL)), and (2) a free-piston Stirling space power technology demonstration project as part of the SP-100 program being conducted in support of the Department of Defense (DOD), DOE, and NASA/Lewis. The generic technology effort includes extensive parametric testing of a 1 kW free-piston Stirling engine (RE-1000), development and validation of a free-piston Stirling performance computer code, and fabrication and initial testing of an hydraulic output modification for the RE-1000 engine. The space power technology effort, under SP-100, addresses the status of the 25 kWe Space Power Demonstrator Engine (SPDE) including early test results.

  8. Nucleic acids, compositions and uses thereof

    DOE Patents [OSTI]

    Preston, III, James F. (Micanopy, FL); Chow, Virginia (Gainesville, FL); Nong, Guang (Gainesville, FL); Rice, John D. (Gainesville, FL); St. John, Franz J. (Baltimore, MD)

    2012-02-21

    The subject invention provides at least one nucleic acid sequence encoding an aldouronate-utilization regulon isolated from Paenibacillus sp. strain JDR-2, a bacterium which efficiently utilizes xylan and metabolizes aldouronates (methylglucuronoxylosaccharides). The subject invention also provides a means for providing a coordinately regulated process in which xylan depolymerization and product assimilation are coupled in Paenibacillus sp. strain JDR-2 to provide a favorable system for the conversion of lignocellulosic biomass to biobased products. Additionally, the nucleic acid sequences encoding the aldouronate-utilization regulon can be used to transform other bacteria to form organisms capable of producing a desired product (e.g., ethanol, 1-butanol, acetoin, 2,3-butanediol, 1,3-propanediol, succinate, lactate, acetate, malate or alanine) from lignocellulosic biomass.

  9. Graphdiyne as a high-capacity lithium ion battery anode material

    SciTech Connect (OSTI)

    Jang, Byungryul; Koo, Jahyun; Park, Minwoo; Kwon, Yongkyung; Lee, Hoonkyung; Lee, Hosik; Nam, Jaewook

    2013-12-23

    Using the first-principles calculations, we explored the feasibility of using graphdiyne, a 2D layer of sp and sp{sup 2} hybrid carbon networks, as lithium ion battery anodes. We found that the composite of the Li-intercalated multilayer ?-graphdiyne was C{sub 6}Li{sub 7.31} and that the calculated voltage was suitable for the anode. The practical specific/volumetric capacities can reach up to 2719?mAh?g{sup ?1}/2032?mAh?cm{sup ?3}, much greater than the values of ?372?mAh?g{sup ?1}/?818?mAh?cm{sup ?3}, ?1117?mAh?g{sup ?1}/?1589?mAh?cm{sup ?3}, and ?744?mAh?g{sup ?1} for graphite, graphynes, and ?-graphdiyne, respectively. Our calculations suggest that multilayer ?-graphdiyne can serve as a promising high-capacity lithium ion battery anode.

  10. The role of the isolated 6s states in BiVO{sub 4} on the electronic and atomic structures

    SciTech Connect (OSTI)

    Ma, Jie; Wang, Lin-Wang

    2014-10-27

    BiVO{sub 4} is one of the most promising photoanodes for water-splitting applications. Similar to many d{sup 10} materials, where the full-shell d electrons are not directly involved in the bonding, the Bi 6s electrons form isolated low-energy bands in BiVO{sub 4}. By systematically altering the energy of the Bi 6s states, we find direct evidences that the isolated s states, through the s-p coupling, affect the BiVO{sub 4} properties, including valence band maximum position, charge density, and atomic structural distortion. We find that many good properties of BiVO{sub 4} for water splitting are related to the s-p coupling due to the existence of Bi 6s states. Based on this understanding, we propose that alloying Bi with Sb can enhance these properties, and hence improve the water-splitting efficiency.

  11. Space reactor/Stirling cycle systems for high power Lunar applications

    SciTech Connect (OSTI)

    Schmitz, P.D.; Mason, L.S.

    1994-09-01

    NASA`s Space Exploration Initiative (SEI) has proposed the use of high power nuclear power systems on the lunar surface as a necessary alternative to solar power. Because of the long lunar night ({approximately} 14 earth days) solar powered systems with the requisite energy storage in the form of regenerative fuel cells or batteries becomes prohibitively heavy at high power levels ({approximately} 100 kWe). At these high power levels nuclear power systems become an enabling technology for variety of missions. One way of producing power on the lunar surface is with an SP-100 class reactor coupled with Stirling power converters. In this study, analysis and characterization of the SP-100 class reactor coupled with Free Piston Stirling Power Conversion (FPSPC) system will be performed. Comparison of results with previous studies of other systems, particularly Brayton and Thermionic, are made.

  12. Space reactor/Stirling cycle systems for high power lunar applications

    SciTech Connect (OSTI)

    Schmitz, P.C. ); Mason, L.S. )

    1991-01-05

    It is desired to estimate performance and mass of a 550 kWe SP-100/Stirling nuclear power lunar base. Mass and efficiency estimates are made by modeling the components as a function of thermal or electrical power output requirements. It is found that utilizing a 1050 K heater head the total system mass is 13537 kg. For the 1300 K heater head temperature the system mass is 11474 kg. Mass and radiator area comparisons are made with a SP-100/Brayton and an Incore thermionic reactor. Two technology levels are looked at which correspond to low and high temperature systems (for the thermionic system it also includes a increase in thermionic output voltage). Stirling converter systems are the lightest of the low temperatures systems. At higher temperatures all of the systems masses are similar. Thermionic systems always produced the smallest radiators because of their high heat rejection temperature with Stirling systems coming in a close second.

  13. 16Be

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Be Ground-State Decay Evaluated Data Measured Ground-State Γcm(T1/2) for 16Be Adopted value: 0.8 ± 0.2 MeV (2012SP01) Measured Mass Excess for 16Be Adopted value: 57450 ± 170 keV (2012WA38) Measurements 2003BA47: Be(40Ar, X); E = 140 MeV/nucleon; measured yields; deduced no evidence for 16Be. 2004TH15: Be(40Ar, X); E = 140 MeV/nucleon; measured fragment isotopic yields; deduced no evidence for 16Be. 2012SP01: 16Be(2n); measured decay products, En, In; deduced two-neutron separation energy.

  14. 18B

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    B Ground-State Decay Evaluated Data Measured Ground-State Γcm(T1/2) for 18B Adopted value: < 26 ns (2003AU02) Measured Mass Excess for 18B Adopted value: 51852 ± 170 keV † (2010SP02) † value and uncertainty derived from 18B unbound by < 10 keV and ΔM(17B) = 43771 keV 170 and ΔM(n) = 8071. Assumes 17B is populated in its ground state. Measurements Neutron Unbound 1984MU27: Not observed in fragmentation of 56Fe on 9Be. 2010SP02: 9Be(19C, 18B → 17B + n), unbound resonance observed

  15. From nanodiamond to nanowires.

    SciTech Connect (OSTI)

    Barnard, A.; Materials Science Division

    2005-01-01

    Recent advances in the fabrication and characterization of semiconductor and metallic nanowires are proving very successful in meeting the high expectations of nanotechnologists. Although the nanoscience surrounding sp{sup 3} bonded carbon nanotubes has continued to flourish over recent years the successful synthesis of the sp{sup 3} analogue, diamond nanowires, has been limited. This prompts questions as to whether diamond nanowires are fundamentally unstable. By applying knowledge obtained from examining the structural transformations in nanodiamond, a framework for analyzing the structure and stability of diamond nanowires may be established. One possible framework will be discussed here, supported by results of ab initio density functional theory calculations used to study the structural relaxation of nanodiamond and diamond nanowires. The results show that the structural stability and electronic properties of diamond nanowires are dependent on the surface morphology, crystallographic direction of the principal axis, and the degree of surface hydrogenation.

  16. Trifluoromethylation of graphene

    SciTech Connect (OSTI)

    Zhou, Lin; Zhou, Lushan; Wang, Xi; Yu, Jingwen; Yang, Mingmei; Wang, Jianbo; Peng, Hailin, E-mail: zfliu@pku.edu.cn, E-mail: hlpeng@pku.edu.cn; Liu, Zhongfan, E-mail: zfliu@pku.edu.cn, E-mail: hlpeng@pku.edu.cn [Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (China)

    2014-09-01

    We demonstrate trifluoromethylation of graphene by copper-catalyzed free radical reaction. The covalent addition of CF{sub 3} to graphene, which changes the carbon atom hybridization from sp{sup 2} to sp{sup 3}, and modifies graphene in a homogeneous and nondestructive manner, was verified with Raman spectroscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. X-ray photoelectron spectroscopy reveals that CF{sub 3} groups are grafted to the basal plane of graphene, with about 4 at. % CF{sub 3} coverage. After trifluoromethylation, the average resistance increases by nearly one order of magnitude, and an energy gap of about 98 meV appears. The noninvasive and mild reaction to synthesize trifluoromethylated graphene paves the way for graphene's applications in electronics and biomedical areas.

  17. Local charge transport properties of hydrazine reduced monolayer graphene oxide sheets prepared under pressure condition

    SciTech Connect (OSTI)

    Ryuzaki, Sou, E-mail: ryuzaki.soh.341@m.kyushu-u.ac.jp; Meyer, Jakob A. S.; Petersen, Sren; Nrgaard, Kasper; Hassenkam, Tue; Laursen, Bo W. [Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetparken 5, 2100 Kbenhaven (Denmark)

    2014-09-01

    Charge transport properties of chemically reduced graphene oxide (RGO) sheets prepared by treatment with hydrazine were examined using conductive atomic force microscopy. The current-voltage (I-V) characteristics of monolayer RGO sheets prepared under atmospheric pressure followed an exponentially increase due to 2D variable-range hopping conduction through small graphene domains in an RGO sheet containing defect regions of residual sp{sup 3} carbon clusters bonded to oxygen groups, whereas RGO sheets prepared in a closed container under moderate pressure showed linear I-V characteristics with a conductivity of 267.2?537.5?S/m. It was found that the chemical reduction under pressure results in larger graphene domains (sp{sup 2} networks) in the RGO sheets when compared to that prepared under atmospheric pressure, indicating that the present reduction of GO sheets under the pressure is one of the effective methods to make well-reduced GO sheets.

  18. Synthesis, crystal structure and DFT studies of N-(4-acetyl-5,5-dimethyl-4,5-dihydro-1,3,4-thiadiazol-2-yl)acetamide

    SciTech Connect (OSTI)

    Gautam, P.; Gautam, D.; Chaudhary, R. P.

    2013-12-15

    The title compound N-(4-acetyl-5,5-dimethyl-4,5-dihydro-1,3,4-thiadiazol-2-yl)acetamide (III) was obtained from the reaction of 2-(propan-2-ylidene)hydrazinecarbothioamide (II) with acetic anhydride instead of formation of the desired thiosemcarbazide derivative of Meldrum acid. The structures of II and III were established by elemental analysis, IR, NMR, Mass and X-ray crystallographic studies. II crystallizes in triclinic system, sp. gr. P-bar1 Z = 2; III crystallizes in the monoclinic system, sp. gr. P2{sub 1}/c, Z = 8. Density functional theory (DFT) calculations have been carried out for III. {sup 1}H and {sup 13}C NMR of III has been calculated and correlated with experimental results.

  19. Nucleic acid compositions and the encoding proteins

    DOE Patents [OSTI]

    Preston, III, James F.; Chow, Virginia; Nong, Guang; Rice, John D.; St. John, Franz J.

    2014-09-02

    The subject invention provides at least one nucleic acid sequence encoding an aldouronate-utilization regulon isolated from Paenibacillus sp. strain JDR-2, a bacterium which efficiently utilizes xylan and metabolizes aldouronates (methylglucuronoxylosaccharides). The subject invention also provides a means for providing a coordinately regulated process in which xylan depolymerization and product assimilation are coupled in Paenibacillus sp. strain JDR-2 to provide a favorable system for the conversion of lignocellulosic biomass to biobased products. Additionally, the nucleic acid sequences encoding the aldouronate-utilization regulon can be used to transform other bacteria to form organisms capable of producing a desired product (e.g., ethanol, 1-butanol, acetoin, 2,3-butanediol, 1,3-propanediol, succinate, lactate, acetate, malate or alanine) from lignocellulosic biomass.

  20. Systems-Level Synthetic Biology for Advanced Biofuel Production

    SciTech Connect (OSTI)

    Ruffing, Anne; Jensen, Travis J.; Strickland, Lucas Marshall; Meserole, Stephen; Tallant, David

    2015-03-01

    Cyanobacteria have been shown to be capable of producing a variety of advanced biofuels; however, product yields remain well below those necessary for large scale production. New genetic tools and high throughput metabolic engineering techniques are needed to optimize cyanobacterial metabolisms for enhanced biofuel production. Towards this goal, this project advances the development of a multiple promoter replacement technique for systems-level optimization of gene expression in a model cyanobacterial host: Synechococcus sp. PCC 7002. To realize this multiple-target approach, key capabilities were developed, including a high throughput detection method for advanced biofuels, enhanced transformation efficiency, and genetic tools for Synechococcus sp. PCC 7002. Moreover, several additional obstacles were identified for realization of this multiple promoter replacement technique. The techniques and tools developed in this project will help to enable future efforts in the advancement of cyanobacterial biofuels.

  1. 1.9 kV AlGaN/GaN Lateral Schottky Barrier Diodes on Silicon

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zhu, Mingda; Song, Bo; Qi, Meng; Hu, Zongyang; Nomoto, Kazuki; Yan, Xiaodong; Cao, Yu; Johnson, Wayne; Kohn, Erhard; Jena, Debdeep; et al

    2015-02-16

    In this letter, we present AlGaN/GaN lateral Schottky barrier diodes on silicon with recessed anodes and dual field plates. A low specific on-resistance RON,SP (5.12 mΩ · cm2), a low turn-on voltage (<0.7 V) and a high reverse breakdown voltage BV (>1.9 kV), were simultaneously achieved in devices with a 25 μm anode/cathode separation, resulting in a power figure-of-merit (FOM) BV2/RON,SP of 727 MW·cm2. The record high breakdown voltage of 1.9 kV is attributed to the dual field plate structure.

  2. Ultrashort pulse laser deposition of thin films

    DOE Patents [OSTI]

    Perry, Michael D.; Banks, Paul S.; Stuart, Brent C.

    2002-01-01

    Short pulse PLD is a viable technique of producing high quality films with properties very close to that of crystalline diamond. The plasma generated using femtosecond lasers is composed of single atom ions with no clusters producing films with high Sp.sup.3 /Sp.sup.2 ratios. Using a high average power femtosecond laser system, the present invention dramatically increases deposition rates to up to 25 .mu.m/hr (which exceeds many CVD processes) while growing particulate-free films. In the present invention, deposition rates is a function of laser wavelength, laser fluence, laser spot size, and target/substrate separation. The relevant laser parameters are shown to ensure particulate-free growth, and characterizations of the films grown are made using several diagnostic techniques including electron energy loss spectroscopy (EELS) and Raman spectroscopy.

  3. Microbial stabilization and mass reduction of wastes containing radionuclides and toxic metals

    DOE Patents [OSTI]

    Francis, A.J.; Dodge, C.J.; Gillow, J.B.

    1991-09-10

    A process is provided to treat wastes containing radionuclides and toxic metals with Clostridium sp. BFGl to release a large fraction of the waste solids into solution and convert the radionuclides and toxic metals to a more concentrated and stable form with concurrent volume and mass reduction. The radionuclides and toxic metals being in a more stable form are available for recovery, recycling and disposal. 18 figures.

  4. Nucleation Rate Analysis of Methane Hydrate from Molecular Dynamics Simulations

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Yuhara, Daisuke; Barnes, Brian C.; Suh, Donguk; Knott, Brandon C.; Beckham, Gregg T.; Yasuoka, Kenji; Wu, David T.; Amadeu K. Sum

    2015-01-06

    Clathrate hydrates are solid crystalline structures most commonly formed from solutions that have nucleated to form a mixed solid composed of water and gas. Understanding the mechanism of clathrate hydrate nucleation is essential to grasp the fundamental chemistry of these complex structures and their applications. Molecular dynamics (MD) simulation is an ideal method to study nucleation at the molecular level because the size of the critical nucleus and formation rate occur on the nano scale. Moreover, various analysis methods for nucleation have been developed through MD to analyze nucleation. In particular, the mean first-passage time (MFPT) and survival probability (SP)more » methods have proven to be effective in procuring the nucleation rate and critical nucleus size for monatomic systems. This study assesses the MFPT and SP methods, previously used for monatomic systems, when applied to analyzing clathrate hydrate nucleation. Because clathrate hydrate nucleation is relatively difficult to observe in MD simulations (due to its high free energy barrier), these methods have yet to be applied to clathrate hydrate systems. In this study, we have analyzed the nucleation rate and critical nucleus size of methane hydrate using MFPT and SP methods from data generated by MD simulations at 255 K and 50 MPa. MFPT was modified for clathrate hydrate from the original version by adding the maximum likelihood estimate and growth effect term. The nucleation rates were calculated by MFPT and SP methods and are within 5%; the critical nucleus size estimated by the MFPT method was 50% higher, than values obtained through other more rigorous but computationally expensive estimates. These methods can also be extended to the analysis of other clathrate hydrates.« less

  5. Structural Sequestration of Uranium in Bacteriogenic Manganese Oxides

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sequestration of Uranium in Bacteriogenic Manganese Oxides Samuel M. Webb (Stanford Synchrotron Radiation Laboratory), Bradley M. Tebo (Oregon Health and Science University), and John Bargar (Stanford Synchrotron Radiation Laboratory). Microbial Respiration Figure 1. Manganese oxides precipitated around a spore (cell) of the marine Mn(II)-oxidizing bacterium, Bacillus sp., strain SG-1. This cell is about 0.5 µm diameter (small axis). Manganese oxides are formed in soils, watersheds, and sea

  6. This is the Title Slide Arial 32 pt

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Laboratory U.S. Department of Energy | Office of Science 7/19/2010 1 Future DNSSEC Directions * New expansions annually - By 2015 all government systems will be covered - General direction is to cover more system by moving requirements to less critical systems - Will broaden systems covered until all government owned systems covered * No non-.gov systems until parents are accepting signatures * Requirements are in a series of NIST Special Publications - SP800-53 General FISMA Requirements * SC8,

  7. SREL Reprint #3027

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7 Clostridium acidtolerans sp. nov., an acid-tolerant spore-forming anaerobic bacterium from contructed wetland sediment Yong-Jin Lee,1,3 Christopher S. Romanek,2,3 and Juergen Wiegel1 1Department of Microbiology, University of Georgia, Athens, GA 30602, USA 2Department of Geology, University of Georgia, Athens, GA 30602, USA 3Savannah River Ecology Laboratory, University of Georgia, Aiken, SC 29802, USA Abstract: An obligately anaerobic, spore-forming, moderately acid-tolerant bacterium, strain

  8. NREL Produces Ethylene via Photosynthesis; Breakthrough Offers Cleaner Alternative for Transportation Fuels (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-08-01

    NREL scientists have demonstrated a way to produce ethylene through photosynthesis, a breakthrough that could lead to more environmentally friendly ways to produce a variety of materials, chemicals, and transportation fuels. The scientists introduced a gene into a cyanobacterium and demonstrated that the organism remains stable through at least four generations, producing ethylene gas that can be easily captured. In the laboratory, the organism, Synechocystis sp. PCC 6803, produced 720 milligrams of ethylene per liter each day.

  9. ARM - Publications: Science Team Meeting Documents

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Initial Cloud Properties Derived from GMS Over the Tropical Western Pacific Doelling, D.R., Ho, S.-P., Smith, W.L., Jr., Analytical Services and Materials, Inc.; Minnis, P., National Aeronautics and Space Administration-Langley Research Center Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Satellite data are needed to provide measurements of the earth-atmosphere shortwave (SW) albedo, outgoing longwave radiation (OLR), and cloud and surface radiative properties for the

  10. Scalable computations in penetration mechanics

    SciTech Connect (OSTI)

    Kimsey, K.D.; Schraml, S.J.; Hertel, E.S.

    1998-01-01

    This paper presents an overview of an explicit message passing paradigm for an Eulerian finite volume method for modeling solid dynamics problems involving shock wave propagation, multiple materials, and large deformations. Three-dimensional simulations of high-velocity impact were conducted on the IBM SP2, the SGI Power challenge Array, and the SGI Origin 2000. The scalability of the message-passing code on distributed-memory and symmetric multiprocessor architectures is presented and compared to the ideal linear performance.

  11. Graphene Produces More Efficient Charge Transport Inside an Organic

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Semiconductor | Stanford Synchrotron Radiation Lightsource Graphene Produces More Efficient Charge Transport Inside an Organic Semiconductor Friday, January 30, 2015 Graphene, a two dimensional semi-metal made of sp2 hybridized carbon, is an outstanding material which exhibits high mechanical and chemical stability, as well as high charge carrier mobility. Graphene has recently received considerable attention because it can be directly integrated into opto-electronic devices, enabling the

  12. Thermal Removal of Tritium from Concrete and Soil to Reduce Groundwater Impacts

    Office of Environmental Management (EM)

    at the Tritium Focus Group Meeting April 22 - 24, 2014 Aiken, South Carolina Thermal Removal of Tritium from Concrete and Soil to Reduce Groundwater Impacts Dennis Jackson P.E. - Savannah River National Laboratory Gerald Blount, Leslie Wells, Joao Cardoso & Thomas Kmetz - Savannah River Nuclear Solutions SP01 Savannah River Site & D-Area Heavy Water Processing Moderator Processing Subunit & Impacts to Groundwater Tritium (pCi/ml) > 200 20 - 200 1Q2006 Synopsis of Tritium at

  13. UCRGJC-119213 PREPRINT Signatures of Testing: On-Site. Inspection Technologies

    Office of Scientific and Technical Information (OSTI)

    e n UCRGJC-119213 PREPRINT Signatures of Testing: On-Site. Inspection Technologies J.J. Zucca, C. Carrigan, P. Goldstein, S.P. Jarpe, J. Sweeney, W.L. Pickles Lawrence Livermore National Laboratory B. Wright Los Alamos National Laboratory This was repared for submittal to the North 1 tlantic Treaty Organization Advanced Study Institute Meeting Alvor, Algarue, Portugal Janua y 23-Februa y 2,1995 Tanuarv 1995 This isa preprintof apaper intended forpublication ina journalorproceedings. Since

  14. A conformational landscape for alginate secretion across the outer membrane

    Office of Scientific and Technical Information (OSTI)

    of Pseudomonas aeruginosa (Journal Article) | SciTech Connect A conformational landscape for alginate secretion across the outer membrane of Pseudomonas aeruginosa Citation Details In-Document Search Title: A conformational landscape for alginate secretion across the outer membrane of Pseudomonas aeruginosa Authors: Tan, Jingquan ; Rouse, Sarah L. ; Li, Dianfan ; Pye, Valerie E. ; Vogeley, Lutz ; Brinth, Alette R. ; El Arnaout, Toufic ; Whitney, John C. ; Howell, P. Lynne ; Sansom, Mark S.P.

  15. Whole genome sequence of an unusual Borrelia burgdorferi sensu lato isolate

    SciTech Connect (OSTI)

    Casjens, S.R.; Dunn, J.; Fraser-Liggett, C. M.; Mongodin, E. F.; Qiu, W. G.; Luft, B. J.; Schutzer, S. E.

    2011-03-01

    Human Lyme disease is caused by a number of related Borrelia burgdorferi sensu lato species. We report here the complete genome sequence of Borrelia sp. isolate SV1 from Finland. This isolate is to date the closest known relative of B. burgdorferi sensu stricto, but it is sufficiently genetically distinct from that species that it and its close relatives warrant its candidacy for new-species status. We suggest that this isolate should be named 'Borrelia finlandensis.'

  16. Performing three-dimensional neutral particle transport calculations on tera scale computers

    SciTech Connect (OSTI)

    Woodward, C S; Brown, P N; Chang, B; Dorr, M R; Hanebutte, U R

    1999-01-12

    A scalable, parallel code system to perform neutral particle transport calculations in three dimensions is presented. To utilize the hyper-cluster architecture of emerging tera scale computers, the parallel code successfully combines the MPI message passing and paradigms. The code's capabilities are demonstrated by a shielding calculation containing over 14 billion unknowns. This calculation was accomplished on the IBM SP ''ASCI-Blue-Pacific computer located at Lawrence Livermore National Laboratory (LLNL).

  17. kmh | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    kmh Ames Laboratory Profile Kai-ming Ho Associate Division of Materials Science & Engineering A502 Zaffarano Phone Number: 515-294-1960 Email Address: kmh@ameslab.gov Ames Laboratory Research Projects: Exploratory Development of Theoretical Methods Photonic Systems Structures and Dynamics in Condensed Systems Surface Structures Far-from-Equilibrium Education: Ph.D. Physics, University of California, Berkeley (thesis advisor: Marvin Cohen), 1978 B.Sc., B.Sc(Sp) University of Hong Kong, 1973

  18. predictive-models | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    predictive-models DOE/BC-88/1/SP. EOR Predictive Models: Handbook for Personal Computer Versions of Enhanced Oil Recovery Predictive Models. BPO Staff. February 1988. 76 pp. NTIS Order No. DE89001204. FORTRAN source code and executable programs for the five EOR Predictive Models shown below are available. The five recovery processes modeled are Steamflood, In-Situ Combustion, Polymer, Chemical Flooding, and CO2 Miscible Flooding. The models are available individually. Min Req.: IBM PC/XT, PS-2,

  19. Final Scientific/Technical Report (Technical Report) | SciTech Connect

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Final Scientific/Technical Report Citation Details In-Document Search Title: Final Scientific/Technical Report The potential for developing commercially viable microbial H2-production systems as a renewable source of biofuel has been limited by the need for an anaerobic environment to enable photobiological H2-production in capable bacterial and algal species. In this project, we have shown that the cyanobacterium Cyanothece sp. ATCC 51142 has the capacity for highly efficient H2-production

  20. Facility Security Officer Contractor Toolcart

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    FOREIGN NATIONALS Interacting with Foreign Nationals BEFORE providing any *foreign national **access to DOE information, programs, and technologies and SNL Sites, DOE, and SNL rules and regulations require authorization be obtained through the SNLrules and regulations require authoization be obtained throught the SNL Foreign National Request (FNR) Security Plan (SP) electronic process. The Contractor and Subcontractor must notify their Sandia Delegated Representative (SDR) to initiate the SNL

  1. spammpack, Version 2013-06-18

    Energy Science and Technology Software Center (OSTI)

    2014-01-17

    This library is an implementation of the Sparse Approximate Matrix Multiplication (SpAMM) algorithm introduced. It provides a matrix data type, and an approximate matrix product, which exhibits linear scaling computational complexity for matrices with decay. The product error and the performance of the multiply can be tuned by choosing an appropriate tolerance. The library can be compiled for serial execution or parallel execution on shared memory systems with an OpenMP capable compiler

  2. Tuning photoluminescence of reduced graphene oxide quantum dots from blue to purple

    SciTech Connect (OSTI)

    Liu, Fuchi; Tang, Tao; Feng, Qian; Li, Ming; Liu, Yuan; Tang, Nujiang Zhong, Wei; Du, Youwei

    2014-04-28

    Reduced graphene oxide quantum dots (rGOQDs) were synthesized by annealing GOQDs in H{sub 2} atmosphere. The photoluminescence (PL) properties of GOQDs and the rGOQDs samples were investigated. The results showed that compared to GOQDs, a blue to purple tunable PL of rGOQDs can be obtained by regulating the annealing temperature. The increase fraction of the newly formed isolated sp{sup 2} clusters may be responsible for the observed tunable PL.

  3. Microbial stabilization and mass reduction of wastes containing radionuclides and toxic metals

    DOE Patents [OSTI]

    Francis, Arokiasamy J. (Middle Island, NY); Dodge, Cleveland J. (Wading River, NY); Gillow, Jeffrey B. (Valley Cottage, NY)

    1991-01-01

    A process is provided to treat wastes containing radionuclides and toxic metals with Clostridium sp. BFGl to release a large fraction of the waste solids into solutin and convert the radionuclides and toxic metals to a more concentrated and stable form with concurrent volume and mass reduction. The radionuclides and toxic metals being in a more stable form are available for recovery, recycling and disposal.

  4. Microsoft Word - THILLY, Ludovic - Abstract.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ludovic Thilly Institut Pprime, CNRS-University of Poitiers-ENSMA SP2MI, 86962 Futuroscope, France Ludovic.thilly@univ-poitiers.fr Cu/Nb nanocomposite wires processed by severe plastic deformation for high pulsed magnets: effects of the nanostructure on the resistance to high stress, high temperature and irradiation Copper-based high strength and high electrical conductivity nanocomposite wires reinforced by Nb nanotubes are prepared by severe plastic deformation, applied with an Accumulative

  5. Seaga: Noncompliance Determination (2015-SE-52001) | Department of Energy

    Energy Savers [EERE]

    Seaga: Noncompliance Determination (2015-SE-52001) Seaga: Noncompliance Determination (2015-SE-52001) June 19, 2015 DOE issued a Notice of Noncompliance Determination to Seaga Manufacturing, Inc. finding that the refrigerated bottle and canned beverage vending machine (BVM) basic model with name plate model SP536R does not comport with the energy conservation standards. DOE determined the product was noncompliant based on DOE testing. Seaga must immediately notify each person (or company) to

  6. DATA MINING AT THE NEBRASKA OIL & GAS COMMISSION

    SciTech Connect (OSTI)

    James R. Weber

    2001-05-01

    The purpose of this study of the hearing records is to identify factors that are likely to impact the performance of a waterflood in the Nebraska panhandle. The records consisted of 140 cases. Most of the hearings were held prior to 1980. Many of the records were incomplete, and data believed to be key to estimating waterflood performance such as Dykstra-Parson permeability distribution or relative permeability were absent. New techniques were applied to analyze the sparse, incomplete dataset. When information is available, but not clearly understood, new computational intelligence tools can decipher correlations in the dataset. Fuzzy ranking and neural networks were the tools used to estimate secondary recovery from the Cliff Farms Unit. The hearing records include 30 descriptive entries that could influence the success or failure of a waterflood. Success or failure is defined by the ratio of secondary to primary oil recovery (S/P). Primary recovery is defined as cumulative oil produced at the time of the hearing and secondary recovery is defined as the oil produced since the hearing date. Fuzzy ranking was used to prioritize the relevance of 6 parameters on the outcome of the proposed waterflood. The 6 parameters were universally available in 44 of the case hearings. These 44 cases serve as the database used to correlate the following 6 inputs with the respective S/P. (1) Cumulative Water oil ratio, bbl/bbl; (2) Cumulative Gas oil ratio, mcf/bbl; (3) Unit area, acres; (4) Average Porosity, %; (5) Average Permeability, md; (6) Initial bottom hole pressure, psi. A 6-3-1 architecture describes the neural network used to develop a correlation between the 6 input parameters and their respective S/P. The network trained to a 85% correlation coefficient. The predicted Cliff Farms Unit S/P is 0.315 or secondary recovery is expected to be 102,700 bbl.

  7. Microbial reductive dehalogenation of vinyl chloride

    DOE Patents [OSTI]

    Spormann, Alfred M [Stanford, CA; Muller, Jochen A [Baltimore, MD; Rosner, Bettina M [Berlin, DE; Von Abendroth, Gregory [Mannheim, DE; Meshulam-Simon, Galit [Los Angeles, CA; McCarty, Perry L [Stanford, CA

    2014-02-11

    Compositions and methods are provided that relate to the bioremediation of chlorinated ethenes, particularly the bioremediation of vinyl chloride by Dehalococcoides-like organisms. An isolated strain of bacteria, Dehalococcoides sp. strain VS, that metabolizes vinyl chloride is provided; the genetic sequence of the enzyme responsible for vinyl chloride dehalogenation; methods of assessing the capability of endogenous organisms at an environmental site to metabolize vinyl chloride; and a method of using the strains of the invention for bioremediation.

  8. Microbial reductive dehalogenation of vinyl chloride

    DOE Patents [OSTI]

    Spormann, Alfred M.; Muller, Jochen A.; Rosner, Bettina M.; Von Abendroth, Gregory; Meshulam-Simon, Galit; McCarty, Perry L

    2011-11-22

    Compositions and methods are provided that relate to the bioremediation of chlorinated ethenes, particularly the bioremediation of vinyl chloride by Dehalococcoides-like organisms. An isolated strain of bacteria, Dehalococcoides sp. strain VS, that metabolizes vinyl chloride is provided; the genetic sequence of the enzyme responsible for vinyl chloride dehalogenation; methods of assessing the capability of endogenous organisms at an environmental site to metabolize vinyl chloride; and a method of using the strains of the invention for bioremediation.

  9. DOE/NV/11718-594

    National Nuclear Security Administration (NNSA)

    sp., and Penicillium oxalicum. Certain of the species which produced black spores tended to predominate in cultures. Five of these species were also among the 14 isolated from Death Valley soils. The predominance of black-spored species in soils from the Nevada Test Site as well as from Death Valley suggests that in strongly insolated regions the melanin pigment affords a degree of protection. To determine relative resistance of fungal spores to uv light, cultures of a number of species were

  10. NMMSS News-October/November 2005

    National Nuclear Security Administration (NNSA)

    OCTOBER/NOVEMBER 2005 SPONSORED BY DOE AND NRC PREPARED BY NAC INTERNATIONAL Office of Security and Safety Performance Assurance Reorganized On October 21, 2005, the DOE Office of Security and Safety Performance Assurance (SSA) announced its new Office of Material Control and Accountability (SP-70) with D.L. Whaley as the acting director. The Office of Material Control and Accountability is responsible for all aspects of SSA's material control and accountability (MC&A) and sealed source

  11. Etiology of Early Lifestage Diseases, Project 84-44, 1985 Final Report.

    SciTech Connect (OSTI)

    Sauter, R.W.

    1986-10-01

    Each year hatcheries experience loss of eggs, fry and fingerlings due to a group of poorly defined diseases called White Spot and Coagulated Yolk. Samples of maternal blood and ovarian fluid (coelomic fluid), as well as unfertilized eggs, were collected at spawning and subsequently tested for the presence of bacteria. Our tests reveal that there is a wide range in mortality rates experienced by the progeny of different brood salmon. Microbiologic tests revealed that these eggs contained a variety of both Gram positive and Gram negative bacteria within their yolk and that the fluids from the females who produced these lots were contaminated with a variety of bacteria. In contrast the eggs and maternal fluids from the six egg lots which experienced the lowest mortalities did not contain high numbers of Gram positive bacteria and contributed only 5% of the total mortalities observed within the 30 egg lots tested. From the 60 egg lots tested over two brood years we have isolated 18 different bacterial genera containing 32 different species from within the yolk surface sterilized, unfertilized eggs. Our tests suggest that Aeromonas hydrophila, Pseudomonas (3 species) Staphylococcus aureus, Vibrio sp., Corynebacterium hoffmanii, Listeria sp. and Bacillus sp. when detected within the yolk of eggs sampled from egg lots prior to fertilization will be associated with higher than normal mortality rates when the remainder of the egg lots containing these bacteria are incubated and reared. 36 refs., 16 figs.

  12. Evolution of electronic states in the Kondo alloy system Yb{sub 1{minus}x}Lu{sub x}B{sub 12}

    SciTech Connect (OSTI)

    Susaki, T.; Konishi, T.; Sekiyama, A.; Mizokawa, T.; Fujimori, A.; Iwasaki, T.; Ueda, S.; Matsushita, T.; Suga, S.; Ishii, H.; Iga, F.; Kasaya, M.

    1997-12-01

    We have studied the effect of Lu substitution on the Kondo insulator YbB{sub 12} by high-resolution photoemission. Comparison of the spectra of YbB{sub 12}, Yb{sub 0.5}Lu{sub 0.5}B{sub 12}, and LuB{sub 12} reveals that the density of states (DOS) of the B sp-derived conduction band near the Fermi level is reduced in YbB{sub 12} over a rather wide ({approximately} 40 meV) energy region. Lu substitution (i) recovers the reduced B sp DOS, (ii) shifts the Yb 4f-derived Kondo peak towards higher binding energy, and (iii) decreases the Yb valence. These results are consistently analyzed using the Anderson-impurity model, and imply interaction between the Yb 4f ions mediated by the Yb 4f-B sp hybridization in YbB{sub 12}. {copyright} {ital 1997} {ital The American Physical Society}

  13. Quantification of C?C and C?O Surface Carbons in Detonation Nanodiamond by NMR

    SciTech Connect (OSTI)

    Cui, J -F; Fang, X -W; Schmidt-Rohr, K

    2014-05-08

    The ability of solid-state 13C NMR to detect and quantify small amounts of sp2-hybridized carbon on the surface of ?5 nm diameter nanodiamond particles is demonstrated. The C?C carbon fraction is only 1.1 0.4% in pristine purified detonation nanodiamond, while a full single-layer graphitic or bucky diamond shell would contain ca. 25% of all C in a 5 nm diameter particle. Instead of large aromatic patches repeatedly proposed in the recent literature, sp3-hybridized CH and COH carbons cover most of the nanodiamond particle surface, accounting for ?5% each. C?O and COO groups also seen in X-ray absorption near-edge structure spectroscopy (XANES) but not detected in previous NMR studies make up ca. 1.5% of all C. They are removed by heat treatment at 800 C, which increases the aromatic fraction. 13C{1H} NMR demonstrates that the various sp2-hybridized carbons are mostly not protonated, but cross-polarization shows that they are separated from 1H by only a few bond lengths, which proves that they are near the protonated surface. Together, the observed CH, COH, C?O, and C?C groups account for 1214% of all C, which matches the surface fraction expected for bulk-terminated 5 nm diameter diamond particles.

  14. The NASA CSTI High Capacity Power Project

    SciTech Connect (OSTI)

    Winter, J.; Dudenhoefer, J.; Juhasz, A.; Schwarze, G.; Patterson, R.; Ferguson, D.; Titran, R.; Schmitz, P.; Vandersande, J.

    1994-09-01

    The SP-100 Space Nuclear Power Program was established in 1983 by DOD, DOE, and NASA as a joint program to develop technology for military and civil applications. Starting in 1986, NASA has funded a technology program to maintain the momentum of promising aerospace technology advancement started during Phase I of SP-100 and to strengthen, in key areas, the changes for successful development and growth capability of space nuclear reactor power systems for a wide range of future space applications. The elements of the CSTI High Capacity Power Project include Systems Analysis, Stirling Power Conversion, Thermoelectric Power Conversion, Thermal Management, Power Management, Systems Diagnostics, Environmental Interactions, and Material/Structural Development. Technology advancement in all elements is required to provide the growth capability, high reliability and 7 to 10 year lifetime demanded for future space nuclear power systems. The overall project with develop and demonstrate the technology base required to provide a wide range of modular power systems compatible with the SP-100 reactor which facilitates operation during lunar and planetary day/night cycles as well as allowing spacecraft operation at any attitude or distance from the sun. Significant accomplishments in all of the project elements will be presented, along with revised goals and project timelines recently developed.

  15. SDO/AIA OBSERVATIONS OF LARGE-AMPLITUDE LONGITUDINAL OSCILLATIONS IN A SOLAR FILAMENT

    SciTech Connect (OSTI)

    Li Ting; Zhang Jun E-mail: zjun@nao.cas.cn

    2012-11-20

    We present the first Solar Dynamics Observatory/Atmospheric Imaging Assembly observations of the large-amplitude longitudinal (LAL) oscillations in the south and north parts (SP and NP) of a solar filament on 2012 April 7. Both oscillations are triggered by flare activities close to the filament. The period varies with filamentary threads, ranging from 44 to 67 minutes. The oscillations of different threads are out of phase, and their velocity amplitudes vary from 30 to 60 km s{sup -1}, with a maximum displacement of about 25 Mm. The oscillations of the SP repeat for about four cycles without any significant damping and then a nearby C2.4 flare causes the transition from the LAL oscillations of the filament to its later eruption. The filament eruption is also associated with a coronal mass ejection and a B6.8 flare. However, the oscillations of the NP damp with time and die out at last. Our observations show that the activated part of the SP repeatedly shows a helical motion. This indicates that the magnetic structure of the filament is possibly modified during this process. We suggest that the restoring force is the coupling of the magnetic tension and gravity.

  16. Designing Dual-functionalized Gels for Self-reconfiguration and Autonomous Motion

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kuksenok, Olga; Balazs, Anna C.

    2015-04-30

    Human motion is enabled by the concerted expansion and contraction of interconnected muscles that are powered by inherent biochemical reactions. One of the challenges in the field of biomimicry is eliciting this form of motion from purely synthetic materials, which typically do not generate internalized reactions to drive mechanical action. Moreover, for practical applications, this bio-inspired motion must be readily controllable. Herein, we develop a computational model to design a new class of polymer gels where structural reconfigurations and internalized reactions are intimately linked to produce autonomous motion, which can be directed with light. These gels contain both spirobenzopyran (SP)more » chromophores and the ruthenium catalysts that drive the oscillatory Belousov-Zhabotinsky (BZ) reaction. Importantly, both the SP moieties and the BZ reaction are photosensitive. When these dual-functionalized gels are exposed to non-uniform illumination, the localized contraction of the gel (due to the SP moieties) in the presence of traveling chemical waves (due to the BZ reaction) leads to new forms of spontaneous, self-sustained movement, which cannot be achieved by either of the mono-functionalized networks.« less

  17. Grain size dependent mechanical properties of nanocrystalline diamond films grown by hot-filament CVD

    SciTech Connect (OSTI)

    Wiora, M; Bruehne, K; Floeter, A; Gluche, P; Willey, T M; Kucheyev, S O; Van Buuren, A W; Hamza, A V; Biener, J; Fecht, H

    2008-08-01

    Nanocrystalline diamond (NCD) films with a thickness of {approx}6 {micro}m and with average grain sizes ranging from 60 to 9 nm were deposited on silicon wafers using a hot-filament chemical vapor deposition (HFCVD) process. These samples were then characterized with the goal to identify correlations between grain size, chemical composition and mechanical properties. The characterization reveals that our films are phase pure and exhibit a relatively smooth surface morphology. The levels of sp{sup 2}-bonded carbon and hydrogen impurities are low, and showed a systematic variation with the grain size. The hydrogen content increases with decreasing grain size, whereas the sp{sup 2} carbon content decreases with decreasing grain size. The material is weaker than single crystalline diamond, and both stiffness and hardness decrease with decreasing grain size. These trends suggest gradual changes of the nature of the grain boundaries, from graphitic in the case of the 60 nm grain size material to hydrogen terminated sp{sup 3} carbon for the 9 nm grain size material. The films exhibit low levels of internal stress and freestanding structures with a length of several centimeters could be fabricated without noticeable bending.

  18. Galvanic interpretation of self-potential signals associated withmicrobial sulfate-reduction

    SciTech Connect (OSTI)

    Williams, Kenneth H.; Hubbard, Susan S.; Banfield, Jillian F.

    2007-05-02

    We have evaluated the usefulness of the self-potential (SP)geophysical method to track the onset and location of microbialsulfate-reduction in saturated sediments during organic carbon amendment.Following stimulation of sulfate-reducing bacteria (SRB) by addition oflactate, anomalous voltages exceeding 600 mV correlated in space and timewith the accumulation of dissolved sulfide. Abiotic experiments in whichthe sulfide concentration at the measurement electrode was systematicallyvaried showed a positive correlation between the magnitude of the SPanomaly and differences in the half-cell potential associated with themeasurement and reference electrodes. Thus, we infer that the SPanomaliesresulted from electrochemical differences that developedbetween sulfide-rich regions and areas having higher oxidation potential.In neither experiment did generation of an SP anomaly require thepresence of an in situ electronic conductor, as is required by othermodels. These findings emphasize the importance of incorporation ofelectrochemical effects at electrode surfaces in interpretation of SPdata from geophysical studies. We conclude that SP measurements provide aminimally invasive means for monitoring stimulated sulfate-reductionwithin saturated sediments.

  19. Analysis of substrate specificity of Schizosaccharomyces pombe Mag1 alkylpurine DNA glycosylase

    SciTech Connect (OSTI)

    Adhikary, Suraj; Eichman, Brandt F.

    2014-10-02

    DNA glycosylases specialized for the repair of alkylation damage must identify, with fine specificity, a diverse array of subtle modifications within DNA. The current mechanism involves damage sensing through interrogation of the DNA duplex, followed by more specific recognition of the target base inside the active site pocket. To better understand the physical basis for alkylpurine detection, we determined the crystal structure of Schizosaccharomyces pombe Mag1 (spMag1) in complex with DNA and performed a mutational analysis of spMag1 and the close homologue from Saccharomyces cerevisiae (scMag). Despite strong homology, spMag1 and scMag differ in substrate specificity and cellular alkylation sensitivity, although the enzymological basis for their functional differences is unknown. We show that Mag preference for 1,N{sup 6}-ethenoadenine ({var_epsilon}A) is influenced by a minor groove-interrogating residue more than the composition of the nucleobase-binding pocket. Exchanging this residue between Mag proteins swapped their {var_epsilon}A activities, providing evidence that residues outside the extrahelical base-binding pocket have a role in identification of a particular modification in addition to sensing damage.

  20. Biosynthesis and recovery of rod-shaped tellurium nanoparticles and their bactericidal activities

    SciTech Connect (OSTI)

    Zare, Bijan; Faramarzi, Mohammad Ali; Sepehrizadeh, Zargham; Shakibaie, Mojtaba; Rezaie, Sassan; Shahverdi, Ahmad Reza

    2012-11-15

    Highlights: ? Biosynthesis of rod shape tellurium nanoparticles with a hexagonal crystal structure. ? Extraction procedure for isolation of tellurium nanoparticles from Bacillus sp. BZ. ? Extracted tellurium nanoparticles have good bactericidal activity against some bacteria. -- Abstract: In this study, a tellurium-transforming Bacillus sp. BZ was isolated from the Caspian Sea in northern Iran. The isolate was identified by various tests and 16S rDNA analysis, and then used to prepare elemental tellurium nanoparticles. The isolate was subsequently used for the intracellular biosynthesis of elemental tellurium nanoparticles. The biogenic nanoparticles were released by liquid nitrogen and purified by an n-octyl alcohol water extraction system. The shape, size, and composition of the extracted nanoparticles were characterized. The transmission electron micrograph showed rod-shaped nanoparticles with dimensions of about 20 nm 180 nm. The energy dispersive X-ray and X-ray diffraction spectra respectively demonstrated that the extracted nanoparticles consisted of only tellurium and have a hexagonal crystal structure. This is the first study to demonstrate a biological method for synthesizing rod-shaped elemental tellurium by a Bacillus sp., its extraction and its antibacterial activity against different clinical isolates.

  1. Thermohaline pore water trends of southeastern Louisiana: Geologic applications and controls on fluid movement

    SciTech Connect (OSTI)

    Marlin, D.; Schramm, B.

    1995-10-01

    Previous research has suggested that dissolution of salt diapirs and the formation of dense, saline brines at shallow depths are concurrent with large scale fluid migration. A critical foundation of these studies is the determination of salinity from the spontaneous potential (SP) log and the ability to drive fluid vertically through the sediment. Derivation of salinity using the perfect shale model and contouring iso-salinity values over intervals of Lower Miocene and Upper Oligocene sediments that contain thick, impermeable carbonate deposits cloud these findings. The calculation of salinity is based on water resistivity (Rw) variations and the geological constraints on derivation of this variable. Application of the imperfect shale membrane model to determine Rw from the SP log provided a closer approximation to Rw from produced water samples over St. Gabriel Field in Ascension and Iberville parishes, La than past SP models. Further analyses of temperature, pressure, salinity, and freshwater hydraulic head trends of Lower Miocene and Upper Oligocene deposits over the field and surrounding area suggest that dissolution of salt occurred prior to hydrocarbon generation and large scale fluid migration is not dynamic at present. An important control that should be used in future studies of thermohaline fluid movement is the identification of local structure, stratigraphic variation, shale membrane efficiency, and time of salt diapirism.

  2. Structure and proposed mechanism of α-glycerophosphate oxidase from Mycoplasma pneumoniae

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Elkhal, Callia K.; Kean, Kelsey M.; Parsonage, Derek; Maenpuen, Somchart; Chaiyen, Pimchai; Claiborne, Al; Karplus, P. Andrew

    2015-03-14

    In this study, the formation of hydrogen peroxide (H₂O₂) by the FAD-dependent α-glycerophosphate oxidase (GlpO), is important for the pathogenesis of Streptococcus pneumoniae and Mycoplasma pneumoniae. The structurally known GlpO from Streptococcus sp. (SspGlpO) is similar to the pneumococcal protein (SpGlpO) and provides a guide for drug design against that target. However, M. pneumoniae GlpO (MpGlpO), having <20% sequence identity with structurally known GlpOs, appears to represent a second type of GlpO we designate as Type II GlpOs. Here, the recombinant His-tagged MpGlpO structure is described at ~2.5 Å resolution, solved by molecular replacement using as a search model themore » Bordetella pertussis protein 3253 (Bp3253) a protein of unknown function solved by structural genomics efforts. Recombinant MpGlpO is an active oxidase with a turnover number of ~580 min⁻¹ while Bp3253 showed no GlpO activity. No substantial differences exist between the oxidized and dithionite-reduced MpGlpO structures. Although, no liganded structures were determined, a comparison with the tartrate-bound Bp3253 structure and consideration of residue conservation patterns guided the construction of a model for α-glycerophosphate (Glp) recognition and turnover by MpGlpO. The predicted binding mode also appears relevant for the type I GlpOs (such as SspGlpO) despite differences in substrate recognition residues, and it implicates a histidine conserved in type I and II Glp oxidases and dehydrogenases as the catalytic acid/base. This work provides a solid foundation for guiding further studies of the mitochondrial Glp dehydrogenases as well as for continued studies of M. pneumoniae and S. pneumoniae glycerol metabolism and the development of novel therapeutics targeting MpGlpO and SpGlpO.« less

  3. Highly polarized light emission by isotropic quantum dots integrated with magnetically aligned segmented nanowires

    SciTech Connect (OSTI)

    Uran, Can; Erdem, Talha; Guzelturk, Burak; Perkgz, Nihan Kosku; Jun, Shinae; Jang, Eunjoo; Demir, Hilmi Volkan

    2014-10-06

    In this work, we demonstrate a proof-of-concept system for generating highly polarized light from colloidal quantum dots (QDs) coupled with magnetically aligned segmented Au/Ni/Au nanowires (NWs). Optical characterizations reveal that the optimized QD-NW coupled structures emit highly polarized light with an s-to p-polarization (s/p) contrast as high as 15:1 corresponding to a degree of polarization of 0.88. These experimental results are supported by the finite-difference time-domain simulations, which demonstrate the interplay between the inter-NW distance and the degree of polarization.

  4. Infrared spectroscopy study of adsorption and photodecomposition of formic acid on reduced and defective rutile TiO{sub 2} (110) surfaces

    SciTech Connect (OSTI)

    Mattsson, Andreas sterlund, Lars; Hu, Shuanglin; Hermansson, Kersti

    2014-11-01

    Adsorption and photodecomposition of formic acid on rutile TiO{sub 2} (110) have been investigated with infrared reflectionabsorption spectroscopy (IRRAS) employing p- and s-polarized light along the [001] and [11{sup }0] crystal directions. The single crystal surfaces were prepared either by sputtering and annealing in ultrahigh vacuum (UHV) to obtain a reduced surface (r-TiO{sub 2}), or by sputtering without annealing to create a rough, highly defective surface (sp-TiO{sub 2}). Results are compared with corresponding measurements on rutile nanocrystals performed in synthetic air. IRRAS spectra obtained on r-TiO{sub 2} and rutile nanocrystals are very similar, and show that in both cases formic acid dissociates and is predominately adsorbed as a bridging bidentate formate species, and that the formate adsorption structure on the nanocrystals is dominated by interactions with majority (110) surfaces. In contrast, the IRRAS spectra on sp-TiO{sub 2} are different, with only minor spectral features associated with (110) surfaces and lost azimuthal symmetry, both of which imply changed adsorption geometry due to bonding to low-coordinated Ti atoms with lower valences. The UV-induced rate of formate photodecomposition is about 30 times higher on rutile nanocrystals in synthetic air compared with sp-TiO{sub 2} under UHV conditions, and even larger than on r-TiO{sub 2}. These differences are explained by the lack of oxygen and limited hydroxyl coverage under UHV conditions. The difference in reactivity between the r-TiO{sub 2} and sp-TiO{sub 2} surfaces is attributed to a high concentration of strongly bonded bridging bidentate formate species on the (110) surface, which lowers its reactivity. The results point to a pressure gap where the availability of molecular oxygen and the hydroxyl concentration limit the photoreactivity in UHV leading to an almost 20-fold decrease of the formate degradation rate in UHV. In contrast, the structure represented by the single crystal (110) surface is shown to capture the essential structural properties, which dictates the formic acid adsorption and adsorption structure of rutile nanocrystals.

  5. The application of XPS to the study of MIC

    SciTech Connect (OSTI)

    Kearns, J.R.; Clayton, C.R.; Halada, G.P.; Gillow, J.B.; Francis, A.J.

    1992-01-01

    The biotic and abiotic factors that contribute to Microbiologically Influenced Corrosion (MIC) involve the transformation of chemical species at a metal surface. X-ray Photoelectron Spectroscopy (XPS) is utilized in conjunction with conventional microbiological and Quantitative Chemical Analytical techniques to better understand the effect of environmental conditions on microbial behavior as well as the ability of bacteria to alter local environmental conditions. Specifically, the interaction of Fe, Cr, Ni, Mo ions with Desulfovibrio sp. under anoxic conditions were studied. This is the first phase of a systematic study of microbial activity and the effects of alloy elements and thermo-mechanical treatments on the MIC resistance of stainless steels.

  6. Spatially separated excitons in 2D and 1D

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    separated excitons in 2D and 1D David Abergel March 10th, 2015 D.S.L. Abergel 3/10/15 1 / 24 Outline 1 Introduction 2 Spatially separated excitons in 2D - The role of disorder 3 Spatially separated excitons in 1D D.S.L. Abergel 3/10/15 2 / 24 Introduction D.S.L. Abergel 3/10/15 3 / 24 The fundamental idea Key ingredients: Independent contacts to each layer High degree of nesting of Fermi surfaces Low SP tunneling rate between layers Picture credit: Kharitonov et al., Phys. Rev. B 78 Phase

  7. Synthesis of new Diamond-like B-C Phases under High Pressure and Temperatures

    SciTech Connect (OSTI)

    Ming, L. C.; Zinin, P. V.; Sharma, S. K.

    2014-04-22

    A cubic BC3 (c-BC3) phase was synthesized by direct transformation from graphitic phases at a pressure of 39 GPa and temperature of 2200 K in a laser-heated diamond anvil cell (DAC). A combination of x-ray diffraction (XRD), electron diffraction (ED), transmission electron microscopy (TEM) imaging, and electron energy loss spectroscopy (EELS) measurements lead us to conclude that the obtained phase is hetero-nano-diamond, c-BC3. The EELS measurements show that the atoms inside the cubic structure are bonded by sp3 bonds.

  8. Whitings as a Potential Mechanism for Controlling Atmospheric Carbon Dioxide Concentrations Final Project Report

    SciTech Connect (OSTI)

    Brady D. Lee; William A. Apel; Michelle R. Walton

    2006-03-01

    Species of cyanobacteria in the genera Synechococcus and Synechocystis are known to be the catalysts of a phenomenon called "whitings", which is the formation and precipitation of fine-grained CaCO3 particles. Whitings occur when the cyanobacteria fix atmospheric CO2 through the formation of CaCO3 on their cell surfaces which leads to precipitation to the ocean floor and subsequent entombment in mud. Whitings represent one potential mechanism for CO2 sequestration. Research was performed to determine the ability of various strains of Synechocystis and Synechococcus to calcify when grown in microcosms amended with 2.5 mM HCO3- and 3.4 mM Ca2+. Results indicated that while all strains tested have the ability to calcify, only two, Synechococcus species, strains PCC 8806 and PCC 8807, were able to calcify to the extent that CaCO3 was precipitated. Enumeration of the cyanobacterial cultures during testing indicated that cell density did not appear to have an effect on calcification. Factors that had the greatest effect on calcification were CO2 removal and subsequent generation of alkaline pH. As CO2 was removed, growth medium pH increased and soluble Ca2+ was removed from solution. The largest increases in growth medium pH occurred when CO2 levels dropped below 400 ppmv. Precipitation of CaCO3 catalyzed by the growth and physiology of cyanobacteria in the Genus Synechococcus represents a potential mechanism for sequestration of atmospheric CO2 produced during the burning of coal for power generation. Synechococcus sp. strain PCC 8806 and Synechococcus sp. strain PCC 8807 were tested in microcosm experiments for their ability to calcify when exposed to a fixed calcium concentration of 3.4 mM and dissolved inorganic carbon concentrations of 0.5, 1.25 and 2.5 mM. Synechococcus sp. strain PCC 8806 removed calcium continuously over the duration of the experiment producing approximately 18.6 mg of solid-phase calcium. Calcium removal occurred over a two-day time period when Synechococcus sp. strain PCC 8807 was tested and only 8.9 mg of solid phase calcium was produced. The ability of the cyanobacteria to create an alkaline growth environment appeared to be the primary factor responsible for CaCO3 precipitation in these experiments. These research results demonstrate the potential of using cyanobacterial catalyzed whitings as a method to sequester CO2 from the atmosphere.

  9. Another Kazakh megaproject lined up

    SciTech Connect (OSTI)

    Not Available

    1992-07-13

    This paper reports that Agip SpA and British Gas plc (BG) have signed an exclusive protocol of intent with Kazakhstan for joint further development of supergiant Karachaganak oil and gas/condensate field and related work in the Uralsk region of the former Soviet republic. The deal ultimately could mean an outlay of $6 billion during a 10 year period of boost production in the field, on stream since 1986, by drilling wells and implementing advanced recovery techniques. Reserves currently are pegged at more than 20 tcf of gas and a combined 1.9-2 billion bbl of liquids, an estimate likely to rise.

  10. Scientists to Meet in Carlsbad, NM for Hard Rock Lab Task Force

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists From Nine Countries to Converge On Carlsbad for Technical Meeting CARLSBAD, N.M., February 7, 2000 - Scientists from nine countries will converge on this southeastern New Mexico city February 7-10 to share their views during the 13 th Äspö Hard Rock Laboratory Task Force Meeting on Modelling of Groundwater Flow and Transport of Solutes. "Carlsbad is quickly becoming recognized as the international center for repository technology," said Dr. Inés Triay, manager of the U.S.

  11. untitled

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    Glossary API Gravity: An arbitrary scale expressing the gravity or density of liquid petroleum products. The measur- ing scale is calibrated in terms of degrees API; it may be calculated in terms of the following formula: Deg API sp gr degF degF = - 1415 60 60 1315 . . The higher the API gravity, the lighter the compound. Light crudes generally exceed 38 degrees API and heavy crudes are commonly labeled as all crudes with an API gravity of 22 degrees or below. Intermediate crudes fall in the

  12. 2

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lower Hybrid Antenna Design for MST J.A. Goetz, M.A. Thomas, M.C. Kaufman, and S.P. Oliva Department of Physics, University of Wisconsin, Madison, WI 53706 Abstract. Inter-digital line antennas are being used to test the feasibility of lower hybrid current drive in MST. The antennas use /4 resonators and launch slow waves at 800 MHz with n || ~ 7.5. Routine operation has been achieved with a good impedance match between antenna and plasma. High power antenna design improvements include larger

  13. Collaborative Project. A Flexible Atmospheric Modeling Framework for the Community Earth System Model (CESM)

    SciTech Connect (OSTI)

    Gettelman, Andrew

    2015-10-01

    In this project we have been upgrading the Multiscale Modeling Framework (MMF) in the Community Atmosphere Model (CAM), also known as Super-Parameterized CAM (SP-CAM). This has included a major effort to update the coding standards and interface with CAM so that it can be placed on the main development trunk. It has also included development of a new software structure for CAM to be able to handle sub-grid column information. These efforts have formed the major thrust of the work.

  14. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Comparison of Mixed-layer Heights from Airborne HSRL and WRF-Chem During CARES Download a printable PDF Submitter: Scarino, A. J., Science Systems and Applications, Inc. Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Scarino AJ, MD Obland, JD Fast, SP Burton, RA Ferrare, CA Hostetler, LK Berg, B Lefer, C Haman, JW Hair, RR Rogers, C Butler, AL Cook, and DB Harper. 2014. "Comparison of mixed layer heights from airborne high spectral resolution

  15. Production of a highly active, soluble form of the cytochrome P450 reductase (CPR A) from Candida tropicalis

    DOE Patents [OSTI]

    Donnelly, Mark

    2006-08-01

    The present invention provides soluble cytochrome p450 reductase (CPR) proteins from Candida sp. having an altered N-terminal region which results in reduced hydrophobicity of the N-terminal region. Also provided are host cells comprising the subject soluble CPR proteins. In addition, the present invention provides nucleotide and corresponding amino acid sequences for soluble CPR proteins and vectors comprising the nucleotide sequences. Methods for producing a soluble CPR, for increasing production of a dicarboxylic acid, and for detecting a cytochrome P450 are also provided.

  16. Nanodiamonds in dusty low-pressure plasmas

    SciTech Connect (OSTI)

    Vandenbulcke, L.; Gries, T.; Rouzaud, J. N.

    2009-01-26

    Dusty plasmas composed of carbon, hydrogen, and oxygen have been evidenced by optical emission spectroscopy and microwave interferometry, due to the increase in electron energy and the decrease in electron density. These plasmas allow homogeneous synthesis of nanodiamond grains composed of either pure diamond nanocrystals only (2-10 nm in size) or of diamond nanocrystals and some sp{sup 2}-hybridized carbon entities. The control of their size and their microstructure could open ways for a wide range of fields. Their formation from a plasma-activated gaseous phase is also attractive because the formation of nanodiamonds in the universe is still a matter of controversy.

  17. Laser image recording on detonation nanodiamond films

    SciTech Connect (OSTI)

    Mikheev, G M; Mikheev, K G; Mogileva, T N; Puzyr, A P; Bondar, V S

    2014-01-31

    A focused He Ne laser beam is shown to cause local blackening of semitransparent detonation nanodiamond (DND) films at incident power densities above 600 W cm{sup -2}. Data obtained with a Raman spectrometer and low-power 632.8-nm laser source indicate that the blackening is accompanied by a decrease in broadband background luminescence and emergence of sharp Raman peaks corresponding to the structures of nanodiamond and sp{sup 2} carbon. The feasibility of image recording on DND films by a focused He Ne laser beam is demonstrated. (letters)

  18. Table Definitions, Sources, and Explanatory Notes

    Gasoline and Diesel Fuel Update (EIA)

    API Gravity Definitions Key Terms Definition API Gravity An arbitrary scale expressing the gravity or density of liquid petroleum products. The measuring scale is calibrated in terms of degrees API; it is calculated as follows: Degrees API = (141.5 / (sp. gr. 60ºF / 60ºF)) - 131.5 The higher the API gravity, the lighter the compound. Light crudes generally exceed 38 degrees API and heavy crudes are commonly labeled as all crudes with an API gravity of 22 degrees or below. Intermediate crudes

  19. Table Definitions, Sources, and Explanatory Notes

    Gasoline and Diesel Fuel Update (EIA)

    Percentages of Total Imported Crude by API Gravity Definitions Key Terms Definition API Gravity An arbitrary scale expressing the gravity or density of liquid petroleum products. The measuring scale is calibrated in terms of degrees API; it is calculated as follows: Degrees API = (141.5 / (sp. gr. 60ºF / 60ºF)) - 131.5 The higher the API gravity, the lighter the compound. Light crudes generally exceed 38 degrees API and heavy crudes are commonly labeled as all crudes with an API gravity of 22

  20. Table Definitions, Sources, and Explanatory Notes

    Gasoline and Diesel Fuel Update (EIA)

    API Gravity Definitions Key Terms Definition API Gravity An arbitrary scale expressing the gravity or density of liquid petroleum products. The measuring scale is calibrated in terms of degrees API; it is calculated as follows: Degrees API = (141.5 / (sp. gr. 60ºF / 60ºF)) - 131.5 The higher the API gravity, the lighter the compound. Light crudes generally exceed 38 degrees API and heavy crudes are commonly labeled as all crudes with an API gravity of 22 degrees or below. Intermediate crudes

  1. Table Definitions, Sources, and Explanatory Notes

    Gasoline and Diesel Fuel Update (EIA)

    Qualities of Crude Oil Input Definitions Key Terms Definition API Gravity An arbitrary scale expressing the gravity or density of liquid petroleum products. The measuring scale is calibrated in terms of degrees API; it is calculated as follows: Degrees API = (141.5 / (sp. gr. 60ºF / 60ºF)) - 131.5 The higher the API gravity, the lighter the compound. Light crudes generally exceed 38 degrees API and heavy crudes are commonly labeled as all crudes with an API gravity of 22 degrees or below.

  2. Table Definitions, Sources, and Explanatory Notes

    Gasoline and Diesel Fuel Update (EIA)

    API Gravity Definitions Key Terms Definition API Gravity An arbitrary scale expressing the gravity or density of liquid petroleum products. The measuring scale is calibrated in terms of degrees API; it is calculated as follows: Degrees API = (141.5 / (sp. gr. 60ºF / 60ºF)) - 131.5 The higher the API gravity, the lighter the compound. Light crudes generally exceed 38 degrees API and heavy crudes are commonly labeled as all crudes with an API gravity of 22 degrees or below. Intermediate crudes

  3. Table Definitions, Sources, and Explanatory Notes

    Gasoline and Diesel Fuel Update (EIA)

    API Gravity Definitions Key Terms Definition API Gravity An arbitrary scale expressing the gravity or density of liquid petroleum products. The measuring scale is calibrated in terms of degrees API; it is calculated as follows: Degrees API = (141.5 / (sp. gr. 60ºF / 60ºF)) - 131.5 The higher the API gravity, the lighter the compound. Light crudes generally exceed 38 degrees API and heavy crudes are commonly labeled as all crudes with an API gravity of 22 degrees or below. Intermediate crudes

  4. Table Definitions, Sources, and Explanatory Notes

    Gasoline and Diesel Fuel Update (EIA)

    API Gravity Definitions Key Terms Definition API Gravity An arbitrary scale expressing the gravity or density of liquid petroleum products. The measuring scale is calibrated in terms of degrees API; it is calculated as follows: Degrees API = (141.5 / (sp. gr. 60ºF / 60ºF)) - 131.5 The higher the API gravity, the lighter the compound. Light crudes generally exceed 38 degrees API and heavy crudes are commonly labeled as all crudes with an API gravity of 22 degrees or below. Intermediate crudes

  5. Solar-induced chemical vapor deposition of diamond-type carbon films

    DOE Patents [OSTI]

    Pitts, J.R.; Tracy, C.E.; King, D.E.; Stanley, J.T.

    1994-09-13

    An improved chemical vapor deposition method for depositing transparent continuous coatings of sp[sup 3]-bonded diamond-type carbon films, comprises: (a) providing a volatile hydrocarbon gas/H[sub 2] reactant mixture in a cold wall vacuum/chemical vapor deposition chamber containing a suitable substrate for said films, at pressure of about 1 to 50 Torr; and (b) directing a concentrated solar flux of from about 40 to about 60 watts/cm[sup 2] through said reactant mixture to produce substrate temperatures of about 750 C to about 950 C to activate deposition of the film on said substrate. 11 figs.

  6. Solar-induced chemical vapor deposition of diamond-type carbon films

    DOE Patents [OSTI]

    Pitts, J. Roland (Lakewood, CO); Tracy, C. Edwin (Golden, CO); King, David E. (Lakewood, CO); Stanley, James T. (Beaverton, OR)

    1994-01-01

    An improved chemical vapor deposition method for depositing transparent continuous coatings of sp.sup.3 -bonded diamond-type carbon films, comprising: a) providing a volatile hydrocarbon gas/H.sub.2 reactant mixture in a cold wall vacuum/chemical vapor deposition chamber containing a suitable substrate for said films, at pressure of about 1 to 50 Torr; and b) directing a concentrated solar flux of from about 40 to about 60 watts/cm.sup.2 through said reactant mixture to produce substrate temperatures of about 750.degree. C. to about 950.degree. C. to activate deposition of the film on said substrate.

  7. US-Russian Cooperation in Upgrading MC&A System at Rosatom Facilities: Measurement of Nuclear Materials

    SciTech Connect (OSTI)

    Powell, Danny H; Jensen, Bruce A

    2011-01-01

    Improve protection of weapons-usable nuclear material from theft or diversion through the development and support of a nationwide sustainable and effective Material Control and Accountability (MC&A) program based on material measurement. The material protection, control, and accountability (MPC&A) cooperation has yielded significant results in implementing MC&A measurements at Russian nuclear facilities: (1) Establishment of MEM WG and MEMS SP; (2) Infrastructure for development, certification, and distribution of RMs; and (3) Coordination on development and implementation of MMs.

  8. September 2013 Most Viewed Documents for Environmental Sciences | OSTI, US

    Office of Scientific and Technical Information (OSTI)

    Dept of Energy, Office of Scientific and Technical Information September 2013 Most Viewed Documents for Environmental Sciences Science Subject Feed Building a secondary containment system Broder, M.F. (1994) 59 /> Separation of heavy metals: Removal from industrial wastewaters and contaminated soil Peters, R.W.; Shem, L. (1993) 45 /> Test of a magnetic device for the amelioration of scale formation at Treatment Facility D Krauter, P.W., Harrar, J.E., Orloff, S.P., Bahowick, S.M. (1996)

  9. Microsoft Word - cmo etalKyotoA4.doc

    Office of Scientific and Technical Information (OSTI)

    MIXING OF CO 2 AND CH 4 IN GAS RESERVOIRS: CODE COMPARISON STUDIES C.M. Oldenburg 1 , D.H.-S. Law 2 , Y. Le Gallo 3 , S.P. White 4 1 Earth Sciences Division 90-1116, Lawrence Berkeley National Laboratory Berkeley, CA 94720 USA 2 Alberta Research Council, Heavy Oil and Oil Sands, 250 Karl Clark Road, Edmonton, Alberta, Canada 3 Institut Français du Pétrole, 174 Avenue de Bois Préau, 92852 Rueil Malmaison Cédex, France 4 Industrial Research Ltd., P.O. Box 31310, Lower Hutt, New Zealand

  10. Whole-Genome Sequences of Two Borrelia afzelii and Two Borrelia garinii Lyme Disease Agent Isolates

    SciTech Connect (OSTI)

    Casjens, S.R.; Dunn, J.; Mongodin, E. F.; Qiu, W.-G.; Luft, B. J.; Fraser-Liggett, C. M.; Schutzer, S. E.

    2011-12-01

    Human Lyme disease is commonly caused by several species of spirochetes in the Borrelia genus. In Eurasia these species are largely Borrelia afzelii, B. garinii, B. burgdorferi, and B. bavariensis sp. nov. Whole-genome sequencing is an excellent tool for investigating and understanding the influence of bacterial diversity on the pathogenesis and etiology of Lyme disease. We report here the whole-genome sequences of four isolates from two of the Borrelia species that cause human Lyme disease, B. afzelii isolates ACA-1 and PKo and B. garinii isolates PBr and Far04.

  11. Lysogenic bacteriophage isolated from acidophilium

    DOE Patents [OSTI]

    Ward, Thomas W. (Idaho Falls, ID); Bruhn, Debby F. (Idaho Falls, ID); Bulmer, Deborah K. (Idaho Falls, ID)

    1992-01-01

    A bacteriophage identified as .phi.Ac1 capable of infecting acidophilic heterotropic bacteria (such as Acidiphilium sp.) and processes for genetically engineering acidophilic bacteria for biomining or sulfur removal from coal are disclosed. The bacteriophage is capable of growth in cells existing at pH at or below 3.0. Lytic forms of the phage introduced into areas experiencing acid drainage kill the bacteria causing such drainage. Lysogenic forms of the phase having genes for selective removal of metallic or nonmetallic elements can be introduced into acidophilic bacteria to effect removal of the desired element form ore or coal.

  12. Microbiological characterization and specific methanogenic activity of anaerobe sludges used in urban solid waste treatment

    SciTech Connect (OSTI)

    Sandoval Lozano, Claudia Johanna Vergara Mendoza, Marisol; Carreno de Arango, Mariela; Castillo Monroy, Edgar Fernando

    2009-02-15

    This study presents the microbiological characterization of the anaerobic sludge used in a two-stage anaerobic reactor for the treatment of organic fraction of urban solid waste (OFUSW). This treatment is one alternative for reducing solid waste in landfills at the same time producing a biogas (CH{sub 4} and CO{sub 2}) and an effluent that can be used as biofertilizer. The system was inoculated with sludge from a wastewater treatment plant (WWTP) (Rio Frio Plant in Bucaramanga-Colombia) and a methanogenic anaerobic digester for the treatment of pig manure (Mesa de los Santos in Santander). Bacterial populations were evaluated by counting groups related to oxygen sensitivity, while metabolic groups were determined by most probable number (MPN) technique. Specific methanogenic activity (SMA) for acetate, formate, methanol and ethanol substrates was also determined. In the acidogenic reactor (R1), volatile fatty acids (VFA) reached values of 25,000 mg L{sup -1} and a concentration of CO{sub 2} of 90%. In this reactor, the fermentative population was predominant (10{sup 5}-10{sup 6} MPN mL{sup -1}). The acetogenic population was (10{sup 5} MPN mL{sup -1}) and the sulphate-reducing population was (10{sup 4}-10{sup 5} MPN mL{sup -1}). In the methanogenic reactor (R2), levels of CH{sub 4} (70%) were higher than CO{sub 2} (25%), whereas the VFA values were lower than 4000 mg L{sup -1}. Substrate competition between sulphate-reducing (10{sup 4}-10{sup 5} MPN mL{sup -1}) and methanogenic bacteria (10{sup 5} MPN mL{sup -1}) was not detected. From the SMA results obtained, acetoclastic (2.39 g COD-CH{sub 4} g{sup -1} VSS{sup -1} day{sup -1}) and hydrogenophilic (0.94 g COD-CH{sub 4} g{sup -1} VSS{sup -1} day{sup -1}) transformations as possible metabolic pathways used by methanogenic bacteria is suggested from the SMA results obtained. Methanotrix sp., Methanosarcina sp., Methanoccocus sp. and Methanobacterium sp. were identified.

  13. Regioselective alkane hydroxylation with a mutant CYP153A6 enzyme

    DOE Patents [OSTI]

    Koch, Daniel J.; Arnold, Frances H.

    2013-01-29

    Cytochrome P450 CYP153A6 from Myobacterium sp. strain HXN1500 was engineered using in-vivo directed evolution to hydroxylate small-chain alkanes regioselectively. Mutant CYP153A6-BMO1 selectively hydroxylates butane and pentane at the terminal carbon to form 1-butanol and 1-pentanol, respectively, at rates greater than wild-type CYP153A6 enzymes. This biocatalyst is highly active for small-chain alkane substrates and the regioselectivity is retained in whole-cell biotransformations.

  14. Carbon-containing cathodes for enhanced electron emission

    DOE Patents [OSTI]

    Cao, Renyu (Cupertino, CA); Pan, Lawrence (Pleasanton, CA); Vergara, German (Madrid, ES); Fox, Ciaran (Los Altos, CA)

    2000-01-01

    A cathode has electropositive atoms directly bonded to a carbon-containing substrate. Preferably, the substrate comprises diamond or diamond-like (sp.sup.3) carbon, and the electropositive atoms are Cs. The cathode displays superior efficiency and durability. In one embodiment, the cathode has a negative electron affinity (NEA). The cathode can be used for field emission, thermionic emission, or photoemission. Upon exposure to air or oxygen, the cathode performance can be restored by annealing or other methods. Applications include detectors, electron multipliers, sensors, imaging systems, and displays, particularly flat panel displays.

  15. Structure of dipole bands in {sup 106}In

    SciTech Connect (OSTI)

    Deo, A. Y.; Palit, R.; Naik, Z.; Joshi, P. K.; Mazumdar, I.; Sihotra, S.; Mehta, D.; Kumar, S.; Chakrabarti, R.; Kshetri, R.

    2009-06-15

    High spin states in neutron-deficient {sup 106}In were investigated using {sup 78}Se({sup 32}S,p3n) reaction at 125 MeV. The level scheme is extended up to 7 MeV of excitation energy for the negative parity states constituting four dipole bands, and the positive parity states which mainly exhibit single-particle excitations are extended up to 5 MeV. Projected deformed Hartree-Fock calculations were carried out to understand the configurations of different bands in this nucleus.

  16. simulators | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    simulators DOE/BC-89/3/SP. Handbook for Personal Computer Version of BOAST II: A Three- Dimensional, Three-Phase Black Oil Applied Simulation Tool. Bartlesville Project Office. January 1989. 82 pp. NTIS Order No. DE89000725. FORTRAN source code and executable program. Min. Req.: IBM PC/AT, PS-2, or compatible computer with 640 Kbytes of memory. Download 464 KB Manual 75 KB Manual 404 KB Reference paper (1033-3,v1) by Fanchi, et al. Manual 83 KB Reference paper (1033-3,v2) by Fanchi, et al. BOAST

  17. Agenda

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Agenda Agenda NUG Meeting: June 5-6, 2000 Garden Plaza Hotel, Oak Ridge, TN The next NERSC User Group meeting will be held in Oak Ridge, TN, June 5-7 and will be hosted by Oak Ridge National Laboratory (ORNL). See the agenda, below. The meeting will be all day Monday, June 5, and is expected to finish Tuesday, June 6, at lunchtime. Following this business meeting will be a training class on the new IBM SP in conjunction with Users Helping Users (UHU) talks and discussions with the consultants.

  18. Multiwalled carbon nanotubes and dispersed nanodiamond novel hybrids: Microscopic structure evolution, physical properties, and radiation resilience

    SciTech Connect (OSTI)

    Gupta, S.; Farmer, J.

    2011-01-01

    We report the structure and physical properties of novel hybrids of multiwalled carbon nanotubes (MWCNTs) and ultradispersed diamond (UDD) forming nanocomposite ensemble that were subjected to 50, 100, and 10{sup 3} kGy gamma ray doses and characterized using various analytical tools to investigate hierarchical defects evolution. This work is prompted by recent work on single-walled CNTs and UDD ensemble [Gupta et al., J. Appl. Phys. 107, 104308 (2010)] where radiation-induced microscopic defects seem to be stabilized by UDD. The present experiments show similar effects where these hybrids display only a minimal structural modification under the maximum dose. Quantitative analyses of multiwavelength Raman spectra revealed lattice defects induced by irradiation assessed through the variation in prominent D, G, and 2D bands. A minimal change in the position of D, G, and 2D bands and a marginal increase in intensity of the defect-induced double resonant Raman scattered D and 2D bands are some of the implications suggesting the radiation coupling. The in-plane correlation length (L{sub a}) was also determined following Tunistra-Koenig relation from the ratio of D to G band (I{sub D}/I{sub G}) besides microscopic stress. However, we also suggest the following taking into account of intrinsic defects of the constituents: (a) charge transfer arising at the interface due to the difference in electronegativity of MWCNT C sp{sup 2} and UDD core (C sp{sup 3}) leading to phonon and electron energy renormalization; (b) misorientation of C sp{sup 2} at the interface of MWCNT and UDD shell (C sp{sup 2}) resulting in structural disorder; (c) softening or violation of the q{approx}0 selection rule leading to D band broadening and a minimal change in G band intensity; and (d) normalized intensity of D and G bands with 2D band help to distinguish defect-induced double resonance phenomena. The MWCNT when combined with nanodiamond showed a slight decrease in their conductance further affected by irradiation pointing at relatively good interfacial contact. Furthermore, owing to high thermal and electrical conductivity properties, they can facilitate potentially efficient heat-transfer applications and some results deduced using Nielsen's model is provided.

  19. Iran Thomas Auditorium, 8600 Nano Carbon: From Solar Cells to Atomic Drums

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 3, 2011 4:00 pm Iran Thomas Auditorium, 8600 Nano Carbon: From Solar Cells to Atomic Drums Paul McEuen Goldwin Smith Professor of Physics, Cornell University and Kavli Institute at Cornell for Nanoscale Science CNMS D D I I S S C C O O V V E E R R Y Y SEMINAR SERIES Abstract: Graphene is the world's first atomic membrane, a robust, one-atom thick freestanding layer of sp2-bonded carbon. Graphene membranes are strong but highly flexible, with bending stiffness comparable to a lipid

  20. 2004 Initial Allocation Awards

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    4 Awards 2004 Initial Allocation Awards The following table lists the allocation awards for NERSC for the extended 2004 fiscal year (Oct 1, 2003 through Nov 30, 2004). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'I' DOE ASCR INCITE award 'S' NERSC Startup award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo SP HPSS Project Title Investigator Id Hours SRUs

  1. 2005 Initial Allocation Awards

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    5 Awards 2005 Initial Allocation Awards The following table lists the allocation awards for NERSC for the 2005 allocation year (Dec 1, 2004 through Nov 30, 2005). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'I' DOE ASCR INCITE award 'S' NERSC Startup award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo SP HPSS Project Title Investigator Id Hours SRUs

  2. 2006 Initial Allocation Awards

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6 Awards 2006 Initial Allocation Awards The following table lists the allocation awards for NERSC for the 2006 allocation year (Dec 1, 2005 through Jan 8, 2007). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'I' DOE ASCR INCITE award 'S' NERSC Startup award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo SP HPSS Project Title Investigator Id Hours SRUs Agarwal,

  3. 2007 Initial Allocation Awards

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7 Awards 2007 Initial Allocation Awards The following table lists the initial allocation awards for NERSC for the 2007 allocation year (Jan 9, 2007 through Jan 7, 2008). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'I' DOE ASCR INCITE award 'S' NERSC Startup award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo SP HPSS Project Title Investigator Id Hours SRUs

  4. 2008 Initial Allocation Awards

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    8 Awards 2008 Initial Allocation Awards The following table lists the allocation awards for NERSC for the 2008 allocation year (Jan 8, 2008 through Jan 12, 2009). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'I' DOE ASCR INCITE award 'S' NERSC Startup award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo SP HPSS Project Title Investigator Id Hours SRUs Adams,

  5. Ab-initio study of transition metal hydrides

    SciTech Connect (OSTI)

    Sharma, Ramesh; Shukla, Seema Dwivedi, Shalini Sharma, Yamini

    2014-04-24

    We have performed ab initio self consistent calculations based on Full potential linearized augmented plane wave (FP-LAPW) method to investigate the optical and thermal properties of yttrium hydrides. From the band structure and density of states, the optical absorption spectra and specific heats have been calculated. The band structure of Yttrium metal changes dramatically due to hybridization of Y sp orbitals with H s orbitals and there is a net charge transfer from metal to hydrogen site. The electrical resistivity and specific heats of yttrium hydrides are lowered but the thermal conductivity is slightly enhanced due to increase in scattering from hydrogen sites.

  6. Documentation - Laboratory for Laser Energetics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6 - Optical Manufacturing Volume X Subsystem and Component Maintenance Inspection of Cavity Structure Optics (S-AB-P-372) Optics Cleaning Procedure (S-AB-P-361) Inspection of CSF Lens Cell (S-AB-P-373) Inspect DM Unit (S-AB-P-369) Inspect FCC (S-AB-P-371) Inspect Focus Lenses and Vacuum Windows (S-AB-P-370) Inspect GCC (S-AB-P-367) Inspect PEPC Unit (S-AB-P-366) Inspect PMA Optics (S-AB-P-375) Inspect Switchyard Optics (S-AB-P-376) Inspection of SP Transport Optics (S-AB-P-362) Inspection of

  7. Humain behavior

    ScienceCinema (OSTI)

    None

    2011-04-25

    Le Dr.Muriel James est ingénieur, conseiller/consultant dans plusieurs commissions (p.ex.justice criminelle au Japon) et universités et est l'auteur de nombreux livres (11) traduits dans plusieurs langues. Le plus connu de ses ouvrages est "Born to win". Dans son exposé elle se réfère à son livre "O.K.Boss" et parle d'un modèle spécifique du comportement humain et de ses qualités essentielles qui est la base de son travail.

  8. Microsoft Word - CMOS7 PDK.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    CM The CM device m are need National The PDK  Phys - C v  Stan - H m P  Sc Si  CA Vi  SP an Pa  PC  Ph Ta LV OS7 P MOS7 Proces models, phys ded to design l Laboratorie K consists of sical Design Contains the verification. ndard Cell an Holds inform make up bas Physical chematic ilvaco Ga ADENCE iews PICE Mod nd SPECT assive De CELL Lay hysical V argeted T VS/DRC A DEV Tran Res Dio Cap Proce s Design Kit sical layouts, n analog or m es 0.35um S f the followi Kit resources n

  9. Microsoft Word - JET_paper_Mantsinen_FINAL.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the Lower Hybrid Interdigital-line Antenna on MST M.C. Kaufman, J.A. Goetz, D.R. Burke, A.R Almagri, S.P. Oliva, J.G. Kulpin Department of Physics, University of Wisconsin, Madison, WI53706 Abstract. Lower hybrid current drive has been posited as a means to reduce tearing fluctuations and improve confinement in the reversed field pinch. The third generation interdigital-line antenna has been installed in MST and preliminary testing has been completed. Source power to the antenna has been

  10. Early Damage Mechanisms in Nuclear Grade Graphite under Irradiation

    SciTech Connect (OSTI)

    Eapen, Dr. Jacob [North Carolina State University] [North Carolina State University; Krishna, Dr Ram [North Carolina State University] [North Carolina State University; Burchell, Timothy D [ORNL] [ORNL; Murty, Prof K.L. [North Carolina State University] [North Carolina State University

    2014-01-01

    Using Raman and X-ray photoelectron spectroscopy,we delineate the bond and defect structures in nuclear block graphite (NBG-18) under neutron and ion irradiation. The strengthening of the defect (D) peak in the Raman spectra under irradiation is attributed to an increase in the topological, sp2-hybridized defects. Using transmission electron microscopy, we provide evidence for prismatic dislocations as well as a number of basal dislocations dissociating into Shockley partials. The non-vanishing D peak in the Raman spectra, together with a generous number of dislocations, even at low irradiation doses, indicates a dislocation-mediated amorphization process in graphite.

  11. T-551: Cisco Security Advisory: Multiple Cisco WebEx Player Vulnerabilities

    Energy Savers [EERE]

    | Department of Energy 51: Cisco Security Advisory: Multiple Cisco WebEx Player Vulnerabilities T-551: Cisco Security Advisory: Multiple Cisco WebEx Player Vulnerabilities February 7, 2011 - 7:56am Addthis PROBLEM: Cisco Security Advisory: Multiple Cisco WebEx Player Vulnerabilities. PLATFORM: Cisco WebEx recording players. Microsoft Windows, Apple Mac OS X, and Linux versions of the player are all affected. Affected versions of the players are those prior to client builds T27LC SP22 and

  12. Bioprocessing of lignite coals using reductive microorganisms. Final technical report, September 30, 1988--March 29, 1992

    SciTech Connect (OSTI)

    Crawford, D.L.

    1992-03-29

    In order to convert lignite coals into liquid fuels, gases or chemical feedstock, the macromolecular structure of the coal must be broken down into low molecular weight fractions prior to further modification. Our research focused on this aspect of coal bioprocessing. We isolated, characterized and studied the lignite coal-depolymerizing organisms Streptomyces viridosporus T7A, Pseudomonas sp. DLC-62, unidentified bacterial strain DLC-BB2 and Gram-positive Bacillus megaterium strain DLC-21. In this research we showed that these bacteria are able to solubilize and depolymerize lignite coals using a combination of biological mechanisms including the excretion of coal solublizing basic chemical metabolites and extracellular coal depolymerizing enzymes.

  13. Bioprocessing of lignite coals using reductive microorganisms

    SciTech Connect (OSTI)

    Crawford, D.L.

    1992-03-29

    In order to convert lignite coals into liquid fuels, gases or chemical feedstock, the macromolecular structure of the coal must be broken down into low molecular weight fractions prior to further modification. Our research focused on this aspect of coal bioprocessing. We isolated, characterized and studied the lignite coal-depolymerizing organisms Streptomyces viridosporus T7A, Pseudomonas sp. DLC-62, unidentified bacterial strain DLC-BB2 and Gram-positive Bacillus megaterium strain DLC-21. In this research we showed that these bacteria are able to solubilize and depolymerize lignite coals using a combination of biological mechanisms including the excretion of coal solublizing basic chemical metabolites and extracellular coal depolymerizing enzymes.

  14. Impact Evaluation Framework for Technology Deployment Programs: An Overview and Example

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    An Overview and Example John H. Reed Innovologie LLC Gretchen Jordan Sandia National Laboratories Edward Vine Lawrence Berkeley National Laboratory July 2007 IMPACT EVALUATION FRAMEWORK FOR TECHNOLOGY DEPLOYMENT PROGRAMS An ap pro ach fo r q u anti fyi ng ret ro sp ect ive en erg y savin gs, cl ean en erg y ad van ces, an d m ark et eff ect s Introduction and Background The document briefly describes a framework for evaluating the "ret- rospective" impact of technology deployment

  15. A. J. &lth, Jr.,.Chlef, Operations

    Office of Legacy Management (LM)

    PI. .A. Erickson, Chief, Research and ,Division Schenectady A. J. &lth, Jr.,.Chlef, Operations REQUEST -FOR MKTALLIC .J%NIUM WIRK SxMrnL : PO rLK:vj ' .. ATT@XTION I C&lYford !H; "Bhitnby,:?.' ~.: ,' . ' ., It is requested ii& a sample of metallic uranic 1; the form of tie 30 to .40 milk in diameter end an inch or two long be shipped to Dr. HO 6. DN~UX+I at. Wesleyan Unlwrsity, xbo le performing ' reeearckin ma88 sp&tro~reph~ under a contrect. with thle office. . If wire of

  16. Multi-functional carbon nanomaterials: Tailoring morphology for multidisciplinary applications

    SciTech Connect (OSTI)

    Dervishi, Enkeleda

    2015-05-14

    Carbon based nanomaterials are being developed to have many new properties and applications. Graphene, is a mono-layer 2D atomic thick structure formed from hexagons of carbon atoms bound together by sp^2hybrid bonds. A carbon nanotube (CNT) can be viewed as a sheet of graphene rolled up into a cylinder, usually 1-2 nanometers in diameter and a few microns thick. A few applications of graphene and carbon nanotubes include the development of Nanoelectronics, nanocomposite materials, Hydrogen storage and Li? battery, etc.

  17. DOE/NV/11718-594

    National Nuclear Security Administration (NNSA)

    ious arp8w ar,Sw 9 08TFffo Fusa8+rh8- TfMg0 radiSEAntment AqT 6 Tw cv8+rtE Tf 51 0 soil sampsoin aed -0636-641.ropso soil RT, improves moisture relations in the felted crusts. In fluid, the trichomes of Microcoleus vaginatus grow beyond the enclosing sheath, assuming the appearance of Phormidium sp. The chemical composition of the sheath can be demonstrated by the action of hemicellulase, which digests it away, causing a rounding off of cross walls and resulting in fragmentation. Fragments

  18. Anaerobic microbial dissolution of lead and production of organic acids

    DOE Patents [OSTI]

    Francis, Arokiasamy J. (Middle Island, NY); Dodge, Cleveland (Wading River, NY); Chendrayan, Krishnachetty (Coimbatore Tamil Nadu, IN); Quinby, Helen L. (Cambridge, MD)

    1988-01-01

    The present invention relates to an anaerobic bacterial culture of Clostridium sp. ATCC No. 53464 which solubilizes lead oxide under anaerobic conditions in coal and industrial wastes and therefore presents a method of removing lead from such wastes before they are dumped into the environment. The rate of lead dissolution during logarithmic growth of the bacteria in 40 ml medium containing 3.32 .mu.moles of lead as lead oxide was 0.042 .mu.moles ml.sup.-1 hr.sup.-1. Dissolution of lead oxide by the bacterial isolate is due to the production of metabolites and acidity in the culture medium. The major metabolites are acetic, butyric and lactic acid. Clostridium sp. ATCC No. 53464 can be used in the recovery of strategic metals from ores and wastes and also for the production of lactic acid for commercial purposes. The process yields large quantities of lactic acid as well as lead complexed in a stable form with said acids.

  19. Cloning systems for Rhodococcus and related bacteria

    DOE Patents [OSTI]

    Finnerty, W.R.; Singer, M.E.

    1990-08-28

    A plasmid transformation system for Rhodococcus was developed using an Escherichia coli-Rhodococcus shuttle plasmid. Rhodococcus sp. H13-A contains three cryptic indigenous plasmids, designated pMVS100, pMVS200 and pMVS300, of 75, 19.5 and 13.4 kilobases (Kb), respectively. A 3.8 Kb restriction fragment of pMVS300 was cloned into pIJ30, a 6.3 Kb pBR322 derivative, containing the E. coli origin of replication (ori) and ampicillin resistance determinant (bla) as well as a Streptomyces gene for thiostrepton resistance, tsr. The resulting 10.1 Kb recombinant plasmid, designated pMVS301, was isolated from E. coli DH1 (pMVS301) and transformed into Rhodococcus sp. AS-50, a derivative of strain H13-A, by polyethylene glycol-assisted transformation of Rhodococcus protoplasts and selection for thiostrepton-resistant transformants. This strain was deposited with the ATCC on Feb. 1, 1988 and assigned ATCC 53719. The plasmid contains the Rhodococcus origin of replication. The plasmid and derivatives thereof can therefore be used to introduce nucleic acid sequences to and from Rhodococcus for subsequent expression and translation into protein. The isolated origin of replication can also be used in the construction of new vectors. 2 figs.

  20. Cloning systems for Rhodococcus and related bacteria

    DOE Patents [OSTI]

    Finnerty, William R.; Singer, Mary E.

    1990-01-01

    A plasmid transformation system for Rhodococcus was developed using an Escherichia coli-Rhodococcus shuttle plasmid. Rhodococcus sp. H13-A contains three cryptic indigenous plasmids, designated pMVS100, pMVS200 and pMVS300, of 75, 19.5 and 13.4 kilobases (Kb), respectively. A 3.8 Kb restriction fragment of pMVS300 was cloned into pIJ30, a 6.3 Kb pBR322 derivative, containing the E. coli origin of replication (ori) and ampicillin resistance determinant (bla) as well as a Streptomyces gene for thiostrepton resistance, tsr. The resulting 10.1 Kb recombinant plasmid, designated pMVS301, was isolated from E. coli DH1 (pMVS301) and transformed into Rhodococcus sp. AS-50, a derivative of strain H13-A, by polyethylene glycol-assisted transformation of Rhodococcus protoplasts and selection for thiostrepton-resistant transformants. This strain was deposited with the ATCC on Feb. 1, 1988 and assigned ATCC 53719. The plasmid contains the Rhodococcus origin of replication. The plasmid and derivatives thereof can therefore be used to introduce nucleic acid sequences to and from Rhodococcus for subsequent expression and translation into protein. The isolated origin of replication can also be used in the construction of new vectors.

  1. Dynamical Symmetries Reflected in Realistic Interactions

    SciTech Connect (OSTI)

    Sviratcheva, K.D.; Draayer, J.P.; /Louisiana State U.; Vary, J.P.; /Iowa State U. /LLNL, Livermore /SLAC

    2007-04-06

    Realistic nucleon-nucleon (NN) interactions, derived within the framework of meson theory or more recently in terms of chiral effective field theory, yield new possibilities for achieving a unified microscopic description of atomic nuclei. Based on spectral distribution methods, a comparison of these interactions to a most general Sp(4) dynamically symmetric interaction, which previously we found to reproduce well that part of the interaction that is responsible for shaping pairing-governed isobaric analog 0{sup +} states, can determine the extent to which this significantly simpler model Hamiltonian can be used to obtain an approximate, yet very good description of low-lying nuclear structure. And furthermore, one can apply this model in situations that would otherwise be prohibitive because of the size of the model space. In addition, we introduce a Sp(4) symmetry breaking term by including the quadrupole-quadrupole interaction in the analysis and examining the capacity of this extended model interaction to imitate realistic interactions. This provides a further step towards gaining a better understanding of the underlying foundation of realistic interactions and their ability to reproduce striking features of nuclei such as strong pairing correlations or collective rotational motion.

  2. Hormetic effect of ionic liquid 1-ethyl-3-methylimidazolium acetate on bacteria

    SciTech Connect (OSTI)

    Nancharaiah, Y. V.; Francis, A. J.

    2015-02-19

    The biological effect of ionic liquids (ILs) is one of the highly debated topics as they are being contemplated for various industrial applications. 1-ethyl-2-methylimidazolium acetate ([EMIM][Ac]) showed remarkable hormesis on anaerobic Clostridium sp. and aerobic Psueudomonas putida. Bacterial growth was stimulated at up to 2.5 g L-1 and inhibited at > 2.5 g L-1 of ([EMIM][Ac]). The growth of Clostridium sp. and P. putida were higher by 0.4 and 4-fold respectively, in the presense of 0.5 g L-1 of ([EMIM][Ac]). Assessment of the effect of [EMIM][Ac] under different growth conditions showed that the hormesis of [EMIM][Ac] was mediated via regulation of medium pH. Hormetic effect of [EMIM][Ac] was evident only in medium with poor buffering capacity and in the presence of a fermentable substrate as the carbon source. The hormetic effect of [EMIM][Ac] on bacterial growth is most likely associated with the buffering capacity of acetate anion. These observations have implications in ILs toxicity studies and ecological risk assessment.

  3. Complete characterization by Raman spectroscopy of the structural properties of thin hydrogenated diamond-like carbon films exposed to rapid thermal annealing

    SciTech Connect (OSTI)

    Rose, Franck Wang, Na; Smith, Robert; Xiao, Qi-Fan; Dai, Qing; Marchon, Bruno; Inaba, Hiroshi; Matsumura, Toru; Saito, Yoko; Matsumoto, Hiroyuki; Mangolini, Filippo; Carpick, Robert W.

    2014-09-28

    We have demonstrated that multi-wavelength Raman and photoluminescence spectroscopies are sufficient to completely characterize the structural properties of ultra-thin hydrogenated diamond-like carbon (DLC:H) films subjected to rapid thermal annealing (RTA, 1 s up to 659 C) and to resolve the structural differences between films grown by plasma-enhanced chemical vapor deposition, facing target sputtering and filtered cathodic vacuum arc with minute variations in values of mass density, hydrogen content, and sp fraction. In order to distinguish unequivocally between films prepared with different density, thickness, and RTA treatment, a new method for analysis of Raman spectra was invented. This newly developed analysis method consisted of plotting the position of the Raman G band of carbon versus its full width at half maximum. Moreover, we studied the passivation of non-radiative recombination centers during RTA by performing measurements of the increase in photoluminescence in conjunction with the analysis of DLC:H networks simulated by molecular dynamics. The results show that dangling bond passivation is primarily a consequence of thermally-induced sp clustering rather than hydrogen diffusion in the film.

  4. MODULAR CAUSTIC SIDE SOLVENT EXTRACTION UNIT GAMMA MONITORS SYSTEM FINAL REPORT

    SciTech Connect (OSTI)

    Casella, V

    2007-06-25

    The Department of Energy (DOE) selected Caustic-Side Solvent Extraction (CSSX) as the preferred technology for the removal of radioactive cesium from High-Level Waste (HLW) at the Savannah River Site (SRS). Before the full-scale Salt Waste Processing Facility (SWPF) becomes operational, the liquid Waste Organization (LWO) plans to process a portion of dissolved saltcake waste through a Modular CSSX Unit (MCU). This work was derived from Technical Task Request SP-TTR-2004-00013, ''Gamma Monitor for MCU.'' The deliverables for this task are the hardware and software for the gamma monitors and a report summarizing the testing and acceptance of this equipment for use in the MCU. Revision of this report is a deliverable in Technical Task Report SP-TTR-2006-00010, ''NaI Shield Box Testing.'' Gamma-ray monitors were developed to: {lg_bullet} Measure the Cs-137 concentration in the decontaminated salt solution before entering the DSS (Decontaminated Salt Solution) Hold Tank, {lg_bullet} Measure the Cs-137 concentration in the strip effluent before entering the Strip Effluent Hold Tank, {lg_bullet} Verify proper operation of the solvent extraction system by verifying material balance within the process (The DSS Hold Tank Cs-137 concentration will be very low and the Cs-137 concentration in the Strip Effluent Hold Tank will be approximately fifteen times higher than the Cs-137 concentration in the Feed Tank.)

  5. Uranium Reduction by Clostridia

    SciTech Connect (OSTI)

    Francis, A.J.; Dodge, Cleveland J.; Gillow, Jeffrey B.

    2006-04-05

    The FRC groundwater and sediment contain significant concentrations of U and Tc and are dominated by low pH, and high nitrate and Al concentrations where dissimilatory metal reducing bacterial activity may be limited. The presence of Clostridia in Area 3 at the FRC site has been confirmed and their ability to reduce uranium under site conditions will be determined. Although the phenomenon of uranium reduction by Clostridia has been firmly established, the molecular mechanisms underlying such a reaction are not very clear. The authors are exploring the hypothesis that U(VI) reduction occurs through hydrogenases and other enzymes (Matin and Francis). Fundamental knowledge of metal reduction using Clostridia will allow us to exploit naturally occurring processes to attenuate radionuclide and metal contaminants in situ in the subsurface. The outline for this report are as follows: (1) Growth of Clostridium sp. under normal culture conditions; (2) Fate of metals and radionuclides in the presence of Clostridia; (3) Bioreduction of uranium associated with nitrate, citrate, and lepidocrocite; and (4) Utilization of Clostridium sp. for immobilization of uranium at the FRC Area 3 site.

  6. Ab initio study of semiconductor atoms impurities in zigzag edge (10,0) carbon nanotubes

    SciTech Connect (OSTI)

    Muttaqien, Fahdzi Suprijadi

    2015-04-16

    The substitutional impurities in zigzag edge (10,0) carbon nanotubes have been studied by using first principles calculations. Silicon (Si), gallium (Ga), and arsenic (As) atom have been chosen as semiconductor based-atom for replacing carbon atoms in CNTs surface. The silicon atom changes the energy gap of pristine zigzag (10,0) CNT, it is 0.19 eV more narrow than that of pristine CNT. Geometrically, the silicon atom creates sp{sup 3} bond with three adjacent carbon atoms, where the tetrahedral form of its sp{sup 3} bond is consisted of free unoccupied state. The silicon atom does not induce magnetism to zigzag CNT. Due to gallium (Ga) and arsenic (As) atom substitution, the zigzag CNT becomes metallic and has magnetic moment of 1?{sub B}. The valance and conduction band are crossed each other, then the energy gap is vanished. The electronic properties of GaAs-doped CNT are dominantly affected by gallium atom and its magnetic properties are dominantly affected by arsenic atom. These results prove that the CNT with desired properties can be obtained with substitutional impurities without any giving structural defect.

  7. Shell effects in hot nuclei and their influence on nuclear composition in supernova matter

    SciTech Connect (OSTI)

    Nishimura, Suguru [Department of Pure and Applied Physics, Waseda University, 3-4-1 Okubo Shinjuku-ku, Tokyo 169-8555 (Japan); Takano, Masatoshi [Department of Pure and Applied Physics, Waseda University, 3-4-1 Okubo Shinjuku-ku, Tokyo 169-8555, Japan and Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo Shinjuku-ku, Tokyo 169-8555 (Japan)

    2014-05-02

    We calculate nuclear composition in supernova (SN) matter explicitly taking into account the temperature dependence of nuclear shell effects. The abundance of nuclei in SN matter is important in the dynamics of core-collapse supernovae and, in recently constructed equations of state (EOS) for SN matter, the composition of nuclei are calculated assuming nuclear statistical equilibrium wherein the nuclear internal free energies govern the composition. However, in these EOS, thermal effects on the shell energy are not explicitly taken into account. To address this shortfall, we calculate herein the shell energies of hot nuclei and examine their influence on the composition of SN matter. Following a simplified macroscopic-microscopic approach, we first calculate single-particle (SP) energies by using a spherical Woods-Saxon potential. Then we extract shell energies at finite temperatures using Strutinsky method with the Fermi distribution as the average occupation probability of the SP levels. The results show that at relatively low temperatures, shell effects are still important and magic nuclei are abundant. However, at temperatures above approximately 2 MeV, shell effects are almost negligible, and the mass fractions with shell energies including the thermal effect are close to those obtained from a simple liquid drop model at finite temperatures.

  8. Anaerobic microbial dissolution of lead and production of organic acids

    DOE Patents [OSTI]

    Francis, A.J.; Dodge, C.; Chendrayan, K.; Quinby, H.L.

    1987-04-16

    The present invention related to an anaerobic bacterial culture of Clostridium sp. ATCC No. 53464 which solubilizes lead oxide under anaerobic conditions in coal and industrial wastes and therefore presents a method of removing lead from such wastes before they are dumped into the environment. The rat of lead dissolution during logarithmic growth of the bacteria in 40 ml medium containing 3.32 ..mu..moles of lead as lead oxide was 0.042 ..mu..moles m1/sup /-/1/ hr/sup /-/1/. Dissolution of lead oxide by the bacterial isolate is due to the production of metabolites and acidity in the culture medium. The major metabolites are acetic, butyric and lactic acid. The major metabolites are acetic, butyric and lactic acid. Clostridium sp. ATCC No. 53464 can be used in the recovery of the strategic metals from ores and wastes and also for the production of lactic acid for commercial purposes. The process yields large quantities of lactic acid as well as lead complexed in a stable form with said acids. 4 figs., 3 tabs.

  9. Final Technical Report, 30 SEPTEMBER 2002 - 31 JANUARY 2006; ENERGY PARTIONING FOR SEISMIC EVENTS IN FENNOSCANDIA AND NW RUSSIA

    SciTech Connect (OSTI)

    Bungum, H.; Kvaerna, T.; Larsen, S.

    2006-01-31

    In this project we have addressed the problem of energy partitioning at distances ranging from very local to regional for various kinds of seismic sources. On the local and regional scale (20-220 km) we have targeted events from the region offshore Western Norway where we have both natural earthquake activity as well as frequent occurrence of underwater explosions carried out by the Norwegian Navy. On the small scale we have focused on analysis of observations from an in-mine network of 16-18 sensors in the Pyhasalmi mine in central Finland. This analysis has been supplemented with 3-D finite difference wave propagation simulations in a realistic mine model to investigate the physical mechanisms that partition seismic energy in the near source region in and around the underground mine. The results from modeling and analysis of local and regional data show that mean S/P amplitude ratios for explosions and natural events differ at individual stations and are in general higher for natural events and frequency bands above 3 Hz. However, the distributions of S/P ratios for explosions and natural events overlap in all analyzed frequency bands. Thus, for individual events in our study area, S/P amplitude ratios can only assist the discrimination between an explosion or a natural event. This observation is supported by synthetic seismograms calculated for simple 1-D models which demonstrate that explosions also generate shear-wave energy if they are fired close to an interface with a strong material contrast (as is the case for most explosions), e.g., free surface or the ocean bottom. The larger difference in S/P ratios between earthquakes and explosions for higher frequencies can be explained by the fact that at low frequencies (larger wavelengths), discontinuities and structural heterogeneities in the explosion source region are stronger generators of converted S energy. The S*-phase, for example, is most efficiently generated whenever an explosion source is located close (within one wavelength) to a strong discontinuity. The Pyhasalmi explosions have generally lower S/P ratios than the rockbursts for all frequencies, but the difference is far too small to be significant for classification purposes. The maxima for the explosion distributions are all below 2, whereas they are all above 2 for the rockbursts. The rockbursts also have a wider distribution of S/P ratios, which can be explained by the variability of the radiation patterns from the rockburst sources. S/P ratios for explosions and rockbursts located in the same small area of the mine show results very similar to those for the full data set. This indicates that the observed differences in S/P ratios between explosions and rockbursts are due to differences in the source characteristics, and not due to propagation effects along paths in the mine. 3-D finite-difference simulations were used to model seismic events within the Pyhasalmi mine. In particular, a January 26, 2003 rockburst was modeled at frequencies of 50 Hz (4 meter grid) and 100 Hz (2 meter grid). We were able to match the characteristics of the observed data at 50 Hz particularly well, and the characteristics of the 100 Hz data reasonably well. These results help validate the 3-D geologic mine model and the reliability of our simulations. The simulations showed that significant shear-energy can be produced due to the geologic and structural heterogeneities within the mine. In fact, mode-converted shear-energy generated from mine heterogeneity can dominate the compressional energy from an explosive source. A strong correlation is observed between the distance of a source from a mine heterogeneity and the magnitude of generated shear-energy. The ratio of shear to compressional energy is about a factor of two larger when the source is located within one wavelength from a mine heterogeneity. The simulations also suggest that excavated mine volumes are significantly stronger contributors to shear-energy generation than geologic heterogeneities. However, the simulations reveal that the magnitude of shear-energy ge

  10. ENVIRONMENTAL BENIGN MITIGATION OF MICROBIOLOGICALLY INFLUENCED CORROSION (MIC)

    SciTech Connect (OSTI)

    J.R. Paterek; G. Husmillo; V. Trbovic

    2003-01-01

    The overall program objective is to develop and evaluate environmental benign agents or products that are effective in the prevention, inhibition, and mitigation of microbially influenced corrosion (MIC) in the internal surfaces of metallic natural gas pipelines. The goal is one or more environmental benign, a.k.a. ''green'' products that can be applied to maintain the structure and dependability of the natural gas infrastructure. The technical approach for this quarter were isolation and cultivation of MIC-causing microorganisms from corroded pipeline samples, optimizing parameters in the laboratory-scale corrosion test loop system and testing the effective concentrations of Capsicum sp. extracts to verify the extent of corrosion on metal coupons by batch culture method. A total of 22 strains from the group of heterotrophic, acid producing, denitrifying and sulfate reducing bacteria were isolated from the gas pipeline samples obtained from Northern Indiana Public Service Company in Trenton, Indiana. They were purified and will be sent out for identification. Bacterial strains of interest were used in antimicrobial screenings and test loop experiments. Parameters for the laboratory-scale test loop system such as gas and culture medium flow rate; temperature; inoculation period; and length of incubation were established. Batch culture corrosion study against Desulfovibrio vulgaris showed that one (S{sub 1}M) out of the four Capsicum sp. extracts tested was effective in controlling the corrosion rate in metal coupons by 33.33% when compared to the untreated group.

  11. Investigation of surface-plasmon coupled red light emitting InGaN/GaN multi-quantum well with Ag nanostructures coated on GaN surface

    SciTech Connect (OSTI)

    Li, Yi; Liu, Bin E-mail: rzhang@nju.edu.cn; Zhang, Rong E-mail: rzhang@nju.edu.cn; Xie, Zili; Zhuang, Zhe; Dai, JiangPing; Tao, Tao; Zhi, Ting; Zhang, Guogang; Chen, Peng; Ren, Fangfang; Zhao, Hong; Zheng, Youdou

    2015-04-21

    Surface-plasmon (SP) coupled red light emitting InGaN/GaN multiple quantum well (MQW) structure is fabricated and investigated. The centre wavelength of 5-period InGaN/GaN MQW structure is about 620?nm. The intensity of photoluminescence (PL) for InGaN QW with naked Ag nano-structures (NS) is only slightly increased due to the oxidation of Ag NS as compared to that for the InGaN QW. However, InGaN QW with Ag NS/SiO{sub 2} structure can evidently enhance the emission efficiency due to the elimination of surface oxide layer of Ag NS. With increasing the laser excitation power, the PL intensity is enhanced by 25%53% as compared to that for the SiO{sub 2} coating InGaN QW. The steady-state electric field distribution obtained by the three-dimensional finite-difference time-domain method is different for both structures. The proportion of the field distributed in the Ag NS for the GaN/Ag NS/SiO{sub 2} structure is smaller as compared to that for the GaN/naked Ag NS structure. As a result, the energy loss of localized SP modes for the GaN/naked Ag NS structure will be larger due to the absorption of Ag layer.

  12. Crystallographic and spectroscopic snapshots reveal a dehydrogenase in action

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Huo, Lu; Davis, Ian; Liu, Fange; Andi, Babak; Esaki, Shingo; Iwaki, Hiroaki; Hasegawa, Yoshie; Orville, Allen M.; Liu, Aimin

    2015-01-07

    Aldehydes are ubiquitous intermediates in metabolic pathways and their innate reactivity can often make them quite unstable. There are several aldehydic intermediates in the metabolic pathway for tryptophan degradation that can decay into neuroactive compounds that have been associated with numerous neurological diseases. An enzyme of this pathway, 2-aminomuconate-6-semialdehyde dehydrogenase, is responsible for ‘disarming’ the final aldehydic intermediate. Here we show the crystal structures of a bacterial analogue enzyme in five catalytically relevant forms: resting state, one binary and two ternary complexes, and a covalent, thioacyl intermediate. We also report the crystal structures of a tetrahedral, thiohemiacetal intermediate, a thioacylmore » intermediate and an NAD+-bound complex from an active site mutant. These covalent intermediates are characterized by single-crystal and solution-state electronic absorption spectroscopy. The crystal structures reveal that the substrate undergoes an E/Z isomerization at the enzyme active site before an sp3-to-sp2 transition during enzyme-mediated oxidation.« less

  13. Optimization of Sparse Matrix-Vector Multiplication on Emerging Multicore Platforms

    SciTech Connect (OSTI)

    Williams, Samuel; Oliker, Leonid; Vuduc, Richard; Shalf, John; Yelick, Katherine; Demmel, James

    2008-10-16

    We are witnessing a dramatic change in computer architecture due to the multicore paradigm shift, as every electronic device from cell phones to supercomputers confronts parallelism of unprecedented scale. To fully unleash the potential of these systems, the HPC community must develop multicore specific-optimization methodologies for important scientific computations. In this work, we examine sparse matrix-vector multiply (SpMV) - one of the most heavily used kernels in scientific computing - across a broad spectrum of multicore designs. Our experimental platform includes the homogeneous AMD quad-core, AMD dual-core, and Intel quad-core designs, the heterogeneous STI Cell, as well as one of the first scientific studies of the highly multithreaded Sun Victoria Falls (a Niagara2 SMP). We present several optimization strategies especially effective for the multicore environment, and demonstrate significant performance improvements compared to existing state-of-the-art serial and parallel SpMV implementations. Additionally, we present key insights into the architectural trade-offs of leading multicore design strategies, in the context of demanding memory-bound numerical algorithms.

  14. Composition and Bonding in Amorphous Carbon Films Grown by Ion Beam Assisted Deposition: Influence of the Assistance Voltage

    SciTech Connect (OSTI)

    Albella, J.M.; Banks, J.C.; Climent-Font, A.; Doyle, B.L.; Gago, R.; Jimenez, I.; Terminello, L.J.

    1998-11-12

    Amorphous carbon films have been grown by evaporation of graphite with concurrent Ar+ ions bombardment assistance. The ion energy has been varied between 0-800 V while keeping a constant ion to carbon atom arrival ratio. Film composition and density were determined by ion scattering techniques (RBS and ERDA), indicating a negligible hydrogen content and a density dependence with the assistance voltage. The bonding structure of the films has been studied by Raman and X-ray Absorption Near-Edge (XANES) spectroscopy. Different qualitative effects have been found depending on the ion energy range. For ion energies below 300 eV, there is a densification of the carbon layer due to the increase in the sp3 content. For ion energies above 300 eV sputtering phenomena dominate over densification, and thinner films are found with increasing assistance voltage until no film is grown over 600 V. The films with the highest SP3 content are grown with intermediate energies between 200-300 V.

  15. Effects of aggregate morphology and size on laser-induced incandescence and scattering from black carbon (mature soot)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bambha, Ray P.; Michelsen, Hope A.

    2015-07-03

    We have used a Single-Particle Soot Photometer (SP2) to measure time-resolved laser-induced incandescence (LII) and laser scatter from combustion-generated mature soot with a fractal dimension of 1.88 extracted from a burner. We have also made measurements on restructured mature-soot particles with a fractal dimension of 2.3–2.4. We reproduced the LII and laser-scatter temporal profiles with an energy- and mass-balance model, which accounted for heating of particles passed through a CW-laser beam over laser–particle interaction times of ~10 μs. Furthermore, the results demonstrate a strong influence of aggregate size and morphology on LII and scattering signals. Conductive cooling competes with absorptivemore » heating on these time scales; the effects are reduced with increasing aggregate size and fractal dimension. These effects can lead to a significant delay in the onset of the LII signal and may explain an apparent low bias in the SP2 measurements for small particle sizes, particularly for fresh, mature soot. The results also reveal significant perturbations to the measured scattering signal from LII interference and suggest rapid expansion of the aggregates during sublimation.« less

  16. Gold nanoparticle formation in diamond-like carbon using two different methods: Gold ion implantation and co-deposition of gold and carbon

    SciTech Connect (OSTI)

    Salvadori, M. C.; Teixeira, F. S.; Araujo, W. W. R.; Sgubin, L. G.; Cattani, M.; Spirin, R. E.; Brown, I. G.

    2012-10-01

    We describe work in which gold nanoparticles were formed in diamond-like carbon (DLC), thereby generating a Au-DLC nanocomposite. A high-quality, hydrogen-free DLC thin film was formed by filtered vacuum arc plasma deposition, into which gold nanoparticles were introduced using two different methods. The first method was gold ion implantation into the DLC film at a number of decreasing ion energies, distributing the gold over a controllable depth range within the DLC. The second method was co-deposition of gold and carbon, using two separate vacuum arc plasma guns with suitably interleaved repetitive pulsing. Transmission electron microscope images show that the size of the gold nanoparticles obtained by ion implantation is 3-5 nm. For the Au-DLC composite obtained by co-deposition, there were two different nanoparticle sizes, most about 2 nm with some 6-7 nm. Raman spectroscopy indicates that the implanted sample contains a smaller fraction of sp{sup 3} bonding for the DLC, demonstrating that some sp{sup 3} bonds are destroyed by the gold implantation.

  17. Morphology-dependent optical absorption and conduction properties of photoelectrochemical photocatalysts for H{sub 2} production: A case study

    SciTech Connect (OSTI)

    Huda, Muhammad N.; Turner, John A.

    2010-06-15

    Efficient photoelectrochemical H{sub 2} production by solar irradiation depends not only on the photocatalyst's band gap and its band-edge positions but also on the detailed electronic nature of the bands, such as the localization or delocalization of the band edges and their orbital characteristics. These determine the carrier transport properties, reactivity, light absorption strength, etc. and significantly impact the material's efficiency as a photoconverter. The localization or delocalization of the band edges may arise either due to the orbital nature of the bands or the structural morphology of the material. A recent experimental report on a photocatalyst based on s/p orbitals showed very poor performance for H{sub 2} production despite the delocalized nature of the s/p bands as compared to the d-bands of transition metal oxides. It is then important to examine whether this poor performance is inherent to these materials or rather arises from some experimental limitations. A theoretical analysis by first-principle methods is well suited to shed light on this question.

  18. Pseudobond parameters for QM/MM studies involving nucleosides, nucleotides, and their analogs

    SciTech Connect (OSTI)

    Chaudret, Robin; Parks, Jerry M; Yang, Weitao

    2013-01-01

    In biological systems involving nucleosides, nucleotides, or their respective analogs, the ribose sugar moiety is the most common reaction site, for example, during DNA replication and repair. How- ever, nucleic bases, which comprise a sizable portion of nucleotide molecules, are usually unreactive during such processes. In quantum mechanical/molecular simulations of nucleic acid reactivity, it may therefore be advantageous to describe specific ribosyl or ribosyl phosphate groups quantum me- chanically and their respective nucleic bases with a molecular mechanics potential function. Here, we have extended the pseudobond approach to enable quantum mechanical/molecular mechanical simulations involving nucleotides, nucleosides, and their analogs in which the interface between the two subsystems is located between the sugar and the base, namely, the C(sp3) N(sp2) bond. The pseudobond parameters were optimized on a training set of 10 molecules representing several nu- cleotide and nucleoside bases and analogs, and they were then tested on a larger test set of 20 diverse molecules. Particular emphasis was placed on providing accurate geometries and electrostatic prop- erties, including electrostatic potential, natural bond orbital (NBO) and atoms in molecules (AIM) charges and AIM first moments. We also tested the optimized parameters on five nucleotide and nu- cleoside analogues of pharmaceutical relevance and a small polypeptide (triglycine). Accuracy was maintained for these systems, which highlights the generality and transferability of the pseudobond approach. 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4772182

  19. DEVELOPMENT OF BYPASSED OIL RESERVES USING BEHIND CASING RESISTIVITY MEASUREMENTS

    SciTech Connect (OSTI)

    Michael G. Conner; Jeffrey A. Blesener

    2005-02-07

    Tubing and rods of the S.P. Pedro-Nepple No.1 well were pulled and the well was prepared for running of Schlumberger's Cased Hole Formation Resistivity Tool (CHFR) in selected intervals. The CHFR tool was successfully run and data was captured. The CHFR formation resistivity readings were compared to original open hole resistivity measurements. Separation between the original and CHFR resistivity curves indicate both swept and un-swept sand intervals. Both watered out sand intervals and those with higher remaining oil saturation have been identified. Due to the nature of these turbidite sands being stratigraphically continuous, both the swept and unswept layers have been correlated across to one of the four nearby offset shallow wells. As a result of the cased hole logging, one well was selected for a workover to recomplete high oil saturated shallow sand intervals. During the second report period, well S.P. Pedro-Nepple No.2 was plugged back with cement excluding the previously existing production interval, squeeze cemented behind casing, selectively perforated in the shallower ''Bell'' zone and placed on production to develop potential new oil reserves and increase overall well productivity. Prior workover production averaged 3.0 BOPD for the previous six-months. Post workover well production was marginally increased to 3.7 BOPD on average for the following six months.

  20. Platinum Supported on NbRuyOz as Electrocatalyst for Ethanol Oxidation in Acid and Alkaline Fuel Cells

    SciTech Connect (OSTI)

    Kotaro, S.; Konopka, D.A.; Li, M.; Artyushkova, K.; Marinkovic, N.; Adzic, R.; Ward, T.L.; Atanassov, P.

    2011-02-02

    Platinum supported on a mixed metal oxide, NbRu{sub y}O{sub z} (8Nb:1Ru), was evaluated as an electrocatalyst for the ethanol oxidation reaction (EOR) in 0.1 M HClO{sub 4} and 1 M KOH. The support was synthesized from a liquid precursor solution of metal chlorides that was aerosolized and thermally decomposed into a powder via the spray pyrolysis (SP) process. Two samples were of primary interest: 30%Pt deposited onto the support by dry impregnation and 60%Pt as part of the precursor solution that underwent in situ SP Pt dispersion. TEM, SEM, and XRD were used to confirm morphology and deposition of Pt. XPS and XAS studies confirmed elemental distribution and oxidation state of Pt catalyst. In situ IRRAS studies in 0.1 M HClO{sub 4} show that these electrocatalysts are capable of facilitating the complete oxidation pathway of EOR, involving scission of the C-C bond and CO oxidation.

  1. Platinum Supported on NbRuyOz as Electrocatalyst for Ethanol Oxidation in Acid and Alkaline Fuel Cells

    SciTech Connect (OSTI)

    D Konopka; M Li; K Artyushkova; N Marinkovic; K Sasaki; R Adzic; T Ward; P Atanassov

    2011-12-31

    Platinum supported on a mixed metal oxide, NbRu{sub y}O{sub z} (8Nb:1Ru), was evaluated as an electrocatalyst for the ethanol oxidation reaction (EOR) in 0.1 M HClO{sub 4} and 1 M KOH. The support was synthesized from a liquid precursor solution of metal chlorides that was aerosolized and thermally decomposed into a powder via the spray pyrolysis (SP) process. Two samples were of primary interest: 30%Pt deposited onto the support by dry impregnation and 60%Pt as part of the precursor solution that underwent in situ SP Pt dispersion. TEM, SEM, and XRD were used to confirm morphology and deposition of Pt. XPS and XAS studies confirmed elemental distribution and oxidation state of Pt catalyst. In situ IRRAS studies in 0.1 M HClO{sub 4} show that these electrocatalysts are capable of facilitating the complete oxidation pathway of EOR, involving scission of the C-C bond and CO oxidation.

  2. Hormetic effect of ionic liquid 1-ethyl-3-methylimidazolium acetate on bacteria

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Nancharaiah, Y. V.; Francis, A. J.

    2015-02-19

    The biological effect of ionic liquids (ILs) is one of the highly debated topics as they are being contemplated for various industrial applications. 1-ethyl-2-methylimidazolium acetate ([EMIM][Ac]) showed remarkable hormesis on anaerobic Clostridium sp. and aerobic Psueudomonas putida. Bacterial growth was stimulated at up to 2.5 g L-1 and inhibited at > 2.5 g L-1 of ([EMIM][Ac]). The growth of Clostridium sp. and P. putida were higher by 0.4 and 4-fold respectively, in the presense of 0.5 g L-1 of ([EMIM][Ac]). Assessment of the effect of [EMIM][Ac] under different growth conditions showed that the hormesis of [EMIM][Ac] was mediated via regulationmore » of medium pH. Hormetic effect of [EMIM][Ac] was evident only in medium with poor buffering capacity and in the presence of a fermentable substrate as the carbon source. The hormetic effect of [EMIM][Ac] on bacterial growth is most likely associated with the buffering capacity of acetate anion. These observations have implications in ILs toxicity studies and ecological risk assessment.« less

  3. Merged and corrected 915 MHz Radar Wind Profiler moments

    SciTech Connect (OSTI)

    Jonathan Helmus,Virendra Ghate, Frederic Tridon

    2014-06-25

    The radar wind profiler (RWP) present at the SGP central facility operates at 915 MHz and was reconfigured in early 2011, to collect key sets of measurements for precipitation and boundary layer studies. The RWP is configured to run in two main operating modes: a precipitation (PR) mode with frequent vertical observations and a boundary layer (BL) mode that is similar to what has been traditionally applied to RWPs. To address issues regarding saturation of the radar signal, range resolution and maximum range, the RWP PR mode is set to operate with two different pulse lengths, termed as short pulse (SP) and long pulse (LP). Please refer to the RWP handbook (Coulter, 2012) for further information. Data from the RWP PR-SP and PR-LP modes have been extensively used to study deep precipitating clouds, especially their dynamical structure as the RWP data does not suffer from signal attenuation during these conditions (Giangrande et al., 2013). Tridon et al. (2013) used the data collected during the Mid-latitude Continental Convective Cloud Experiment (MC3E) to improve the estimation of noise floor of the RWP recorded Doppler spectra.

  4. Promoting Uranium Immobilization by the Activities of Microbial Phosphatases

    SciTech Connect (OSTI)

    Robert J. Martinez; Melanie J. Beazley; Samuel M. Webb; Martial Taillefert; and Patricia A. Sobecky

    2007-04-19

    The overall objective of this project is to examine the activity of nonspecific phosphohydrolases present in naturally occurring subsurface microorganisms for the purpose of promoting the immobilization of radionuclides through the production of uranium [U(VI)] phosphate precipitates. Specifically, we hypothesize that the precipitation of U(VI) phosphate minerals may be promoted through the microbial release and/or accumulation of PO4 3- as a means to detoxify radionuclides and heavy metals. An experimental approach was designed to determine the extent of phosphatase activity in bacteria previously isolated from contaminated subsurface soils collected at the ERSP Field Research Center (FRC) in Oak Ridge, TN. Screening of 135 metal resistant isolates for phosphatase activity indicated the majority (75 of 135) exhibited a phosphatase-positive phenotype. During this phase of the project, a PCR based approach has also been designed to assay FRC isolates for the presence of one or more classes of the characterized non-specific acid phophastase (NSAP) genes likely to be involved in promoting U(VI) precipitation. Testing of a subset of Pb resistant (Pbr) Arthrobacter, Bacillus and Rahnella strains indicated 4 of the 9 Pbr isolates exhibited phosphatase phenotypes suggestive of the ability to bioprecipitate U(VI). Two FRC strains, a Rahnella sp. strain Y9602 and a Bacillus sp. strain Y9-2, were further characterized. The Rahnella sp. exhibited enhanced phosphatase activity relative to the Bacillus sp. Whole-cell enzyme assays identified a pH optimum of 5.5, and inorganic phosphate accumulated in pH 5.5 synthetic groundwater (designed to mimic FRC conditions) incubations of both strains in the presence of a model organophosphorus substrate provided as the sole C and P source. Kinetic experiments showed that these two organisms can grow in the presence of 200 μM dissolved uranium and that Rahnella is much more efficient in precipitating U(VI) than Bacillus sp. The precipitation of U(VI) must be mediated by biological activity as less than 3% soluble U(VI) was removed either from the abiotic or the heat-killed cell controls. Interestingly, the pH has a strong effect on growth and U(VI) biomineralization rates by Rahnella. Thermodynamic modeling identifies autunite-type minerals [Ca(UO2)2(PO4)2] as the precipitate likely formed in the synthetic FRC groundwater conditions at all pH investigated. Extended X-ray absorption fine structure measurements have recently confirmed that the precipitate found in these incubations is an autunite and meta-autunite-type mineral. A kinetic model of U biomineralization at the different pH indicates that hydrolysis of organophosphate can be described using simple Monod kinetics and that uranium precipitation is accelerated when monohydrogen phosphate is the main orthophosphate species in solution. Overall, these experiments and ongoing soil slurry incubations demonstrate that the biomineralization of U(VI) through the activity of phosphatase enzymes can be expressed in a wide range of geochemical conditions pertaining to the FRC site.

  5. Investigation of saliva of patients with periodontal disease using NAA

    SciTech Connect (OSTI)

    Zamboni, C. B.; Metairon, S.; Medeiros, I. M. M. A.

    2013-05-06

    In this study the non-stimulated whole saliva of 26 healthy subjects (mean age 33.9 {+-} 11.0 years, range: 26 to 49 years) and 11 patients with periodontal disease (mean age 41.7 {+-} 11.5 years; range 29 to 55 years) was investigated using Neutron Activation Analysis (NAA) technique. The samples were obtained from donors at Sao Paulo city (Brazil). The analyses were performed in the nuclear reactor IEA-R1 (3.5-4.5MW, pool type) at IPEN/CNEN-SP (Brazil). Considerable changes in Ca and S saliva's level were identified in patients with periodontal disease suggesting they can be used as monitors of periodontal diseases.

  6. Italy to open exclusive Po basin area in 1992

    SciTech Connect (OSTI)

    Rigo, F.

    1991-05-27

    Under new regulations of the European Community, no oil and gas state monopoly is allowed in the member countries. As a consequence, by 1992 Italy will open for application by international oil companies all lands not covered by exploitation concessions in the ENI exclusive area. This monopoly area covers the prolific Po basin, the cradle of the Italian state oil company AGIP SpA, Milan. Due to profits derived from numerous gas discoveries of the 1950s in this basin, AGIP, a relatively small enterprise at that time, could eventually afford to expand in Italy and abroad and through successful exploration achieve status of a major international oil company. The ENI exclusive area covers the Po and Veneto plains and adjacent 15 km of territorial waters, for a total surface of more than 23,000 sq miles. The area to become available for exploration will be regulated by the Italian petroleum law, for one of the most favorable in the world.

  7. Herbaceous crops for energy in Italy: Present status of the research program promoted by ENEL (Italian Electric Company)

    SciTech Connect (OSTI)

    Schenone, G.

    1996-12-31

    The paper presents a synthesis of the main results of the research program promoted by ENEL (Italian Electric Company) on herbaceous energy crops. The objective of the program is to evaluate the potentials of different species and cultivars for biomass fuel production in Italy. For the most promising species, all the links of the chain from cultivation to delivery at the plant gate at the lowest possible cost have to be organized. So far the following species gave annual productivities above 20 dry tons/ha: fiber sorghum (Sorghum sp.); miscanthus (Miscanthus sinensis); and giant reed (Arundo donax). The highest biomass yields, well above 40 dry tons/ha in several trials, were given by giant reed.

  8. High Sensitivity Proteomics Assisted Discovery of a Novel Operon Involved in the Assembly of Photosystem II, a Membrane Protein Complex

    SciTech Connect (OSTI)

    Wegener, Kimberly M.; Welsh, Eric A.; Thornton, Leeann E.; Keren, Nir S.; Jacobs, Jon M.; Hixson, Kim K.; Monroe, Matthew E.; Camp, David G.; Smith, Richard D.; Pakrasi, Himadri B.

    2008-10-10

    Photosystem II (PSII) is a large membrane protein complex that performs the water oxidation reactions of the photosynthetic electron transport chain in plants, algae, and cyanobacteria. Utilizing a high-throughput proteomic analysis of isolated PSII complexes from the cyanobacterium Synechocystis sp. PCC 6803, we have identified four PSII associated proteins that are encoded by the cofactor integration operon (cio). This operon contains genes with putative binding domains for chlorophyll, iron-sulfur centers, and bilins. Protein levels of this operon are more abundant in several PSII lumenal mutants, suggesting an accumulation of cio products in partially assembled PSII complexes. This provides a rare example of a bacterial operon whose protein products are translationally coordinated and associated with a single protein complex. Genetic deletion of cio results in decreased oxygen evolution by PSII, suggesting that cio products may function as regulators of PSII complex assembly or degradation, maybe facilitating an uncharacterized step in PSII assembly.

  9. X-ray diffraction, spectroscopic and DFT studies of 1-(4-bromophenyl)-3,5-diphenylformazan

    SciTech Connect (OSTI)

    Tezcan, H.; Tokay, N.; Alpaslan, G.; Erdnmez, A.

    2013-12-15

    The crystal structure of 1-(4-bromophenyl)-3,5-diphenylformazan was determined by X-ray single crystal diffraction technique. The crystals are orthorhombic, a = 23.0788(9), b = 7.9606(3), c = 18.6340(12) , Z = 8, sp. gr. Pbca, R{sub 1} = 0.074. The structure was also examined using the density-functional theory. Its structure stability, and frontier molecular orbital components were discussed and the results were compared with X-ray and spectral results. The maximum absorbtion peaks of the UV-vis spectrum of the compound have been calculated using the time-dependent density-functional theory. It was found a good agreement between the calculated and experimental maximum absorption wavelength.

  10. Electron paramagnetic resonance and Raman spectroscopy studies on carbon-doped MgB{sub 2} superconductor nanomaterials

    SciTech Connect (OSTI)

    Bateni, Ali; Somer, Mehmet E-mail: msomer@ku.edu.tr; Erdem, Emre E-mail: msomer@ku.edu.tr; Repp, Sergej; Weber, Stefan; Acar, Selcuk; Kokal, Ilkin; Hler, Wolfgang

    2015-04-21

    Undoped and carbon-doped magnesium diboride (MgB{sub 2}) samples were synthesized using two sets of mixtures prepared from the precursors, amorphous nanoboron, and as-received amorphous carbon-doped nanoboron. The microscopic defect structures of carbon-doped MgB{sub 2} samples were systematically investigated using X-ray powder diffraction, Raman and electron paramagnetic resonance spectroscopy. Mg vacancies and C-related dangling-bond active centers could be distinguished, and sp{sup 3}-hybridized carbon radicals were detected. A strong reduction in the critical temperature T{sub c} was observed due to defects and crystal distortion. The symmetry effect of the latter is also reflected on the vibrational modes in the Raman spectra.

  11. Microstructure fabrication process induced modulations in CVD graphene

    SciTech Connect (OSTI)

    Matsubayashi, Akitomo Zhang, Zhenjun; Lee, Ji Ung; LaBella, Vincent P.

    2014-12-15

    The systematic Raman spectroscopic study of a mimicked graphene device fabrication is presented. Upon photoresist baking, compressive stress is induced in the graphene which disappears after it is removed. The indirect irradiation from the electron beam (through the photoresist) does not significantly alter graphene characteristic Raman peaks indicating that graphene quality is preserved upon the exposure. The 2D peak shifts and the intensity ratio of 2D and G band, I(2D)/I(G), decreases upon direct metal deposition (Co and Py) suggesting that the electronic modulation occurs due to sp{sup 2} C-C bond weakening. In contrast, a thin metal oxide film deposited graphene does not show either the significant 2D and G peaks shift or I(2D)/I(G) decrease upon the metal deposition suggesting the oxide protect the graphene quality in the fabrication process.

  12. Microbial reduction of iron ore

    DOE Patents [OSTI]

    Hoffmann, Michael R. (Pasadena, CA); Arnold, Robert G. (Pasadena, CA); Stephanopoulos, Gregory (Pasadena, CA)

    1989-01-01

    A process is provided for reducing iron ore by treatment with microorganisms which comprises forming an aqueous mixture of iron ore, microorganisms operable for reducing the ferric iron of the iron ore to ferrous iron, and a substrate operable as an energy source for the microbial reduction; and maintaining the aqueous mixture for a period of time and under conditions operable to effect the reduction of the ore. Preferably the microorganism is Pseudomonas sp. 200 and the reduction conducted anaerobically with a domestic wastewater as the substrate. An aqueous solution containing soluble ferrous iron can be separated from the reacted mixture, treated with a base to precipitate ferrous hydroxide which can then be recovered as a concentrated slurry.

  13. UV resonance Raman analysis of trishomocubane and diamondoid dimers

    SciTech Connect (OSTI)

    Meinke, Reinhard Thomsen, Christian; Maultzsch, Janina; Richter, Robert; Merli, Andrea; Fokin, Andrey A.; Department of Organic Chemistry, Kiev Polytechnic Institute, pr. Pobedy 37, 03056 Kiev ; Koso, Tetyana V.; Schreiner, Peter R.; Rodionov, Vladimir N.

    2014-01-21

    We present resonance Raman measurements of crystalline trishomocubane and diamantane dimers containing a C=C double bond. Raman spectra were recorded with excitation energies between 2.33eV and 5.42eV. The strongest enhancement is observed for the C=C stretch vibration and a bending mode involving the two carbon atoms of the C=C bond, corresponding to the B{sub 2g} wagging mode of ethylene. This is associated with the localization of the ?-HOMO and LUMO and the elongation of the C=C bond length and a pyramidalization of the two sp{sup 2}-hybridized carbon atoms at the optical excitation. The observed Raman resonance energies of the trishomocubane and diamantane dimers are significantly lower than the HOMO-LUMO gaps of the corresponding unmodified diamondoids.

  14. Development of biological coal gasification (MicGAS process). Final report, May 1, 1990--May 31, 1995

    SciTech Connect (OSTI)

    1998-12-31

    ARCTECH has developed a novel process (MicGAS) for direct, anaerobic biomethanation of coals. Biomethanation potential of coals of different ranks (Anthracite, bitumious, sub-bitumious, and lignites of different types), by various microbial consortia, was investigated. Studies on biogasification of Texas Lignite (TxL) were conducted with a proprietary microbial consortium, Mic-1, isolated from hind guts of soil eating termites (Zootermopsis and Nasutitermes sp.) and further improved at ARCTECH. Various microbial populations of the Mic-1 consortium carry out the multi-step MicGAS Process. First, the primary coal degraders, or hydrolytic microbes, degrade the coal to high molecular weight (MW) compounds. Then acedogens ferment the high MW compounds to low MW volatile fatty acids. The volatile fatty acids are converted to acetate by acetogens, and the methanogens complete the biomethanation by converting acetate and CO{sub 2} to methane.

  15. An active metallic nanomatryushka with two similar super-resonances

    SciTech Connect (OSTI)

    Wu, D. J.; Cheng, Y.; Wu, X. W.; Liu, X. J.

    2014-07-07

    The optical properties of a simple metallic nanomatryushka (nanosphere-in-a-nanoshell) with gain have been investigated theoretically. The spaser (surface plasmon amplification by stimulated emission of radiation) phenomena can be observed at two critical wavelengths in the active metallic nanomatryushkas. With increasing the gain coefficient of the middle layer, a similar super surface plasmon (SP) resonance is first found at the ???|? mode of the active nanoparticles and then breaks down. With further increasing the gain coefficient, another similar super-resonance occurs at the ???|? mode. The near-field enhancements in the active nanomatryushkas also have been greatly amplified at the critical wavelengths for ???|? and ???|? modes. It is further found that the amplifications of SPs in the active AgSiO?Au nanoshell are strongest in four kinds of nanoshells and hence the largest near fields. The giant near-field enhancement can greatly enhance the Raman excitation and emission.

  16. Configuration space Faddeev calculations. Progress report, 1 November 1992--31 October 1993

    SciTech Connect (OSTI)

    Payne, G.L.; Klink, W.H.; Polyzou, W.N.

    1994-01-01

    The detailed study of few-body systems provides one of the most precise tools for studying the dynamics of nuclei and nucleons. This research program consists of a careful theoretical study of few-body systems and methods for modeling these systems. Brief summaries are given on several aspects of this program including the following: the use of configuration-space Faddeev equations to solve the proton-deuteron scattering problem with long-range Coulomb interactions; calculations of the triton binding energy; inclusion of dynamical vacuum structures in Hamiltonian light-front dynamics; constraints in Bethe-Salpeter models; signature of quantum chaos; applications of point form relativistic quantum mechanics collective nuclear models and the symplectic group Sp (6,R); and anharmonic oscillators and quantum mechanics systems in nonconstant magnetic fields.

  17. Realistic Two-body Interactions in Many-nucleon Systems: Correlated Motion beyond Single-particle Behavior

    SciTech Connect (OSTI)

    Sviratcheva, K.D.; Draayer, J.P.; /Louisiana State U. /Iowa State U. /LLNL, Livermore /SLAC

    2006-06-27

    In the framework of the theory of spectral distributions we perform an overall comparison of three modern realistic interactions, CD-Bonn, CD-Bonn+3terms, and GXPF1 in a broad range of nuclei in the upper fp shell and study their ability to account for the development of isovector pairing correlations and collective rotational motion in many-particle nuclear systems. Our findings reveal a close similarity between CD-Bonn and CD-Bonn+3terms, while both interactions possess features different from the ones of GXPF1. The GXPF1 interaction is used to determine the strength parameter of a quadrupole term that augments an isovector-pairing model interaction with Sp(4) dynamical symmetry, which in turn is shown to yield a reasonable agreement with the experimental low-lying energy spectra of {sup 58}Ni and {sup 58}Cu.

  18. Evaluation of Novel Design Strategies for Developing Zinc Finger Nucleases Tools for Treating Human Diseases

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bach, Christian; Sherman, William; Pallis, Jani; Patra, Prabir; Bajwa, Hassan

    2014-01-01

    Zinc finger nucleases (ZFNs) are associated with cell death and apoptosis by binding at countless undesired locations. This cytotoxicity is associated with the binding ability of engineered zinc finger domains to bind dissimilar DNA sequences with high affinity. In general, binding preferences of transcription factors are associated with significant degenerated diversity and complexity which convolutes the design and engineering of precise DNA binding domains. Evolutionary success of natural zinc finger proteins, however, evinces that nature created specific evolutionary traits and strategies, such as modularity and rank-specific recognition to cope with binding complexity that are critical for creating clinical viable toolsmore » to precisely modify the human genome. Our findings indicate preservation of general modularity and significant alteration of the rank-specific binding preferences of the three-finger binding domain of transcription factor SP1 when exchanging amino acids in the 2nd finger.« less

  19. SPRE I Free-Piston Stirling Engine Testing at NASA Lewis Research Center

    SciTech Connect (OSTI)

    Cairelli, J.E.

    1994-09-01

    As part of the NASA funded portion of the SP-100 Advanced Technology Program the Space Power Research Engine (SPRE I) was designed and built to serve as a research tool for evaluation and development of advanced Stirling engine concepts. The SPRE I is designed to produce 12.5 kW electrical power when operated with helium at 15 MPa and with an absolute temperature ratio of two. The engine is now under test in a new test facility which was designed and built at NASA LeRC specifically to test the SPRE I. This paper describes the SPRE I, the NASA test facility, the initial SPRE I test results, and future SPRE I test plans.

  20. Cultural Alimentation in Latin America

    ScienceCinema (OSTI)

    None

    2011-04-25

    Le Prof. Paolo Freire(nom?) a dirigé en Brésil un plan national d'alphabétisatation d'adultes. La base de sa méthode est d'essayer de ne pas rester sur la mécanique du mot, mais de le relier avec la réalité sociale et donner un réveillement critique de la conscience populaire en face de la réalité historique du pays. Il était professeur d'histoire et de philosophie de Récife, puis exilé et depuis il était prof. à Harvard, a travaillé à l'Unesco et est maintenant conseiller spécial à l'Office d'Education du centre oecuménique des églises

  1. 15Be

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Be Ground-State Decay Evaluated Data Measured Ground-State Γcm(T1/2) for 15Be Adopted value: 0.58 ± 0.20 MeV (2013SN02) Measured Mass Excess for 15Be Adopted value: 49821 ± 100 keV (2013SN02: from Eres(14Be + n) = 1.8 ± 0.1 MeV) Measurements 2011SP01: 9Be(17C, 2p); E = 55 MeV/nucleon; measured energy loss, time of flight, magnetic rigidity, Be fragment spectra and (Be)(n)-coin. 15Be; deduced g.s., J, π, decay mode, unbound energy. 2013SN02: 2H(14Be, 15Be); E = 59 MeV/nucleon; measured 14Be,

  2. 6Li Cross Section

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    α, X) (Current as of 02/01/2016) NSR Reaction Eα (MeV) Cross Section File X4 Dataset Date Added 1985NE05 6Li(α, γ): γ thick target yield resonance X4 02/15/2012 1966FO05 6Li(α, γ): σ 0.9 - 3.0 2 < Eγ < 4 MeV, 4 < Eγ < 7 MeV, thick target capture γ-ray yield, capture γ-ray yield of 2.43 MeV resonance 02/29/2012 1989BA24 6Li(α, γ): σ 1.085, 1.175 X4 02/15/2012 1979SP01 6Li(α, γ): thick target yield curve for 718 keV γ-rays 1140 - 1250 keV 1175 keV resonance 07/19/2011

  3. 9B

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    B Ground-State Decay Evaluated Data Measured Ground-State Γcm for 9B Adopted value: 0.54 ± 0.21 keV (2004TI06) Measured Mass Excess for 9B Adopted value: 12415.7 ± 1.0 keV (2003AU02) Measurements 1955AL57: 7Li(3He, p), E not given; measured Ep. 10B(3He, α), 6Li(3He, α), E not given; measured Eα. 9B deduced excited state energy. 1960KE07: 9Be(p, n)9B; measured not abstracted; deduced nuclear properties. 1960SA03: 9Be(p, n)9B; measured not abstracted; deduced nuclear properties. 1960SP08:

  4. A=11Be (1975AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    75AJ02) (See Energy Level Diagrams for 11Be) GENERAL: See also (1968AJ02) and Table 11.1 [Table of Energy Levels] (in PDF or PS). Model calculations: (1970TA1J, 1973SA30, 1973SP02, 1974IR04). Special reactions: (1969AR13, 1971AR02, 1972VO06, 1973BA81, 1973KO1D, 1973WI15). Muon capture (See also reaction 2.): (1967DE1E, 1968DE20, 1969BE41, 1970VA24, 1971BE57, 1973MU1B). Pion reactions: (1962DY1A, 1971BE85). Mass of 11Be: The mass excess of 11Be is given as 20.181 ± 0.015 MeV (1965MA54) [based on

  5. A=13O (1976AJ04)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    76AJ04) (See the Isobar Diagram for 13O) GENERAL: See also (1970AJ04) and Table 13.29 [Table of Energy Levels] (in PDF or PS). Theoretical papers: (1973HA49, 1973RO1R, 1973SP1A, 1975GR03, 1975BE31, 1975HU14). Review papers: (1972CE1A, 1972WA07, 1973HA77). Mass of 13O: From the Q-value of the 16O(3He, 6He)13O reaction [Q0 = -30.508 ± 0.010 MeV] the atomic mass excess of 13O is determined to be 23.105 ± 0.010 MeV (1971TR03). 13O is then bound with respect to 12N + p and 11C + 2p by 1.528 and

  6. A=16Ne (1982AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    82AJ01) (See the Isobar Diagram for 16Ne) GENERAL: See also (1977AJ02) and Table 16.27 [Table of Energy Levels] (in PDF or PS). Theoretical work: (1978GU10, 1978SP1C, 1981LI1M). Reviews: (1977CE05, 1979AL1J, 1980TR1E). Mass of 16Ne: The Q-values of the 20Ne(α, 8He) and 16O(π+, π-) reactions lead to an atomic mass excess of 24.02 ± 0.04 MeV for 16Ne. 16Ne is then unbound with respect to decay into 14O + 2p by 1.43 MeV and is bound with respect to decay into 15F + p by 0.04 MeV. 1. 16O(π+,

  7. A=3He (2010PU04)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2010PU04) GENERAL: Ground State: Jπ = 1/2+ μ = -2.127497718 ± 0.000000025 μN Mass Excess, M - A = 14.93121475 ± 0.00000242 MeV Decay Mode: stable Binding Energy, EB = 7.718043 ± 0.000002 MeV Proton Separation Energy, Sp = 5.493478 ± 0.000002 MeV A topic of interest in connection with the mass 3 nuclei is the difference in binding energies of 3H and 3He and the relationship of this difference to charge symmetry breaking (CSB). The binding energy of 3H is larger than that of 3He by a little

  8. A=7B (1979AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    9AJ01) (See the Isobar Diagram for 7B) GENERAL: See also (1974DA1B, 1974IR04, 1975BE31, 1975BE56, 1976IR1B, 1977SP1B). 1. 10B(3He, 6He)7B Qm = -18.55 A 6He group corresponding to the unbound ground state of 7B has been identified at E(3He) = 50 MeV: M - A (7B) = 27.94 ± 0.10, Γ = 1.4 ± 0.2 MeV. The isobaric quartet mass law would predict M - A = 27.76 ± 0.17 MeV. 7B is unbound with respect to 6Be + p (Q = 2.27), 5Li + 2p (Q = 1.68), 4He + 3p (Q = 3.65). The expected single-particle width is

  9. A=9B (66LA04)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    66LA04) (See Energy Level Diagrams for 9B) GENERAL: See (BA59N, PH60A, SP60, TA60L, BA62G, IN62, GR64C, RE64A, ST64). See also Table 9.10 [Table of Energy Levels] (in PDF or PS). 1. (a) 6Li(3He, p)8Be Qm = 16.787 Eb = 16.601 (b) 6Li(3He, n)8B Qm = -1.975 The excitation functions for protons leading to the ground and 2.9 MeV states of 8Be (p0 and p1) have been measured for E(3He) = 0.9 to 17 MeV. Resonances are reported at E(3He) = 1.6 MeV (Γ = 0.25 MeV) and E(3He) = 3.0 MeV (Γ = 1.5 MeV)

  10. Density functional study of H-induced defects as nucleation sites in hybrid carbon nanomaterials.

    SciTech Connect (OSTI)

    Barnard, A.; Terranova, M. L.; Rossi, M.; Dip. Scienze e Tecnologie Chimiche; Dip di Energetica; INFM

    2005-01-01

    Recently we have reported on the growth of an exciting new class of hybrid nanostructured carbon materials, coupling nanosized diamond with single-walled carbon nanotubes. The inner structures were shown to be single-walled C nanotubes or bundles of single-walled nanotubes up to 15 {micro}m long, and the outer deposit consisted of faceted diamond crystallites with diameters in the range of 20-100 nm. To aid in understanding the mechanisms responsible for the formation of such materials, the present study uses density functional theory to examine the role of atomic hydrogen in creating localized sp{sup 3} hybridized defects on the outer wall of carbon nanotubes. The results illustrate that certain absorption configurations may produce defects containing dangling carbon bonds, and thus promote the formation of suitable sites for nanodiamond nucleation.

  11. Business Case Analysis of Prototype Fabrication Division Recapitalization PlanSummary

    SciTech Connect (OSTI)

    Booth, Steven Richard; Benson, Faith Ann; Dinehart, Timothy Grant

    2015-04-30

    Business case studies were completed to support procurement of new machines and capital equipment in the Prototype Fabrication (PF) Division SM-39 and TA-03-0102 machine shops. Economic analysis was conducted for replacing the Mazak 30Y Mill-Turn Machine in SM-39, the Haas Vertical CNC Mill in Building 102, and the Hardinge Q10/65-SP Lathe in SM-39. Analysis was also conducted for adding a NanoTech Lathe in Building 102 and a new electrical discharge machine (EDM) in SM-39 to augment current capabilities. To determine the value of switching machinery, a baseline scenario was compared with a future scenario where new machinery was purchased and installed. Costs and benefits were defined via interviews with subject matter experts.

  12. First principles DFT study of ferromagnetism in SnO{sub 2} induced by doped group 1A and 2A non-magnetic elements X (X=Li, Na, K, Be, Mg, Ca)

    SciTech Connect (OSTI)

    Chakraborty, Brahmananda Ramaniah, Lavanya M.

    2014-04-24

    Transition metal - free - ferromagnetism in diluted magnetic semiconductors (DMS) is of much current interest in the search for more efficient DMS materials for spintronic applications. Here, we report the results of our first principles density functional theory (DFT) study on impurity - induced ferromagnetism in non-magnetic SnO{sub 2} by a non-magnetic impurity. The impurities considered are sp-type of group 1A and 2A elements X (X = Li, Na, K, Be, Mg, Ca). Even a single atom of the group 1A elements makes the system magnetic, whereas for the group 2A elements Ca and Mg, a higher doping is required to induce ferromagnetism. For all the elements studied, the magnetic moment appears to increase with the doping concentration, at least at certain impurity separations, which is a positive indicator for practical applications.

  13. Spin-filtering effect of thin Al{sub 2}O{sub 3} barrier on tunneling magnetoresistance

    SciTech Connect (OSTI)

    Joo, Sungjung; Jung, K. Y.; Jun, K. I.; Shin, K. H.; Kim, D. S.; Hong, J. K.; Rhie, K. E-mail: krhie@korea.ac.kr; Lee, B. C. E-mail: krhie@korea.ac.kr

    2014-04-14

    Tunneling magnetoresistance (TMR) dependence on the Al{sub 2}O{sub 3} barrier thickness was investigated for CoFe/Al{sub 2}O{sub 3}/CoFe magnetic tunnel junctions (MTJs). MTJs with very thin Al{sub 2}O{sub 3} layers were grown by inserting an amorphous FeZr buffer layer whose role is only to reduce the roughness of bottom electrode. The TMR decreased as the thickness of the Al{sub 2}O{sub 3} layer was reduced. The results are analyzed with the dependence of the spin-filtering effect on the Al{sub 2}O{sub 3} thickness. It was found that a simple model of separating sp- and d-like electrons does not work, and it may suggest that the tunneling electrons are in rather hybridized state.

  14. Microbial reduction of iron ore

    DOE Patents [OSTI]

    Hoffmann, M.R.; Arnold, R.G.; Stephanopoulos, G.

    1989-11-14

    A process is provided for reducing iron ore by treatment with microorganisms which comprises forming an aqueous mixture of iron ore, microorganisms operable for reducing the ferric iron of the iron ore to ferrous iron, and a substrate operable as an energy source for the microbial reduction; and maintaining the aqueous mixture for a period of time and under conditions operable to effect the reduction of the ore. Preferably the microorganism is Pseudomonas sp. 200 and the reduction conducted anaerobically with a domestic wastewater as the substrate. An aqueous solution containing soluble ferrous iron can be separated from the reacted mixture, treated with a base to precipitate ferrous hydroxide which can then be recovered as a concentrated slurry. 11 figs.

  15. Closeout of Advanced Boron and Metal Loaded High Porosity Carbons.

    SciTech Connect (OSTI)

    Peter C. Eklund (deceased); T. C. Mike Chung; Henry C. Foley; Vincent H. Crespi

    2011-05-01

    The Penn State effort explored the development of new high-surface-area materials for hydrogen storage, materials that could offer enhancement in the hydrogen binding energy through a direct chemical modification of the framework in high specific-surface-area platforms. The team chemically substituted boron into the hexagonal sp2 carbon framework, dispersed metal atoms bound to the boro-carbon structure, and generated the theory of novel nanoscale geometries that can enhance storage through chemical frustration, sheet curvature, electron deficiency, large local fields and mixed hybridization states. New boro-carbon materials were synthesized by high temperature plasma, pyrolysis of boron-carbon precursor molecules, and post-synthesis modification of carbons. Hydrogen uptake has been assessed, and several promising leads have been identified, with the requirement to simultaneously optimize total surface area while maintaining the enhanced hydrogen binding energies already demonstrated.

  16. On the third cohomology of algebraic groups of rank two in positive characteristic

    SciTech Connect (OSTI)

    Dzhumadil'daev, A S; Ibraev, Sh Sh

    2014-03-31

    We evaluate the third cohomology of simple simply connected algebraic groups of rank 2 over an algebraically closed field of positive characteristic with coefficients in simple modules. It is assumed that the characteristic p of the field is greater than3 for SL{sub 3}, greater than5 for Sp{sub 4}, and greater than11 forG{sub 2}. It follows from the main result that the dimensions of the cohomology spaces do not exceed the rank of the algebraic group in question. To prove the main results we study the properties of the first-quadrant Lyndon-Hochschild-Serre spectral sequence with respect to an infinitesimal subgroup, namely, the Frobenius kernel of the given algebraic group. Bibliography: 49 titles.

  17. Single walled carbon nanotube networkTetrahedral amorphous carbon composite film

    SciTech Connect (OSTI)

    Iyer, Ajai Liu, Xuwen; Koskinen, Jari; Kaskela, Antti; Kauppinen, Esko I.; Johansson, Leena-Sisko

    2015-06-14

    Single walled carbon nanotube network (SWCNTN) was coated by tetrahedral amorphous carbon (ta-C) using a pulsed Filtered Cathodic Vacuum Arc system to form a SWCNTNta-C composite film. The effects of SWCNTN areal coverage density and ta-C coating thickness on the composite film properties were investigated. X-Ray photoelectron spectroscopy measurements prove the presence of high quality sp{sup 3} bonded ta-C coating on the SWCNTN. Raman spectroscopy suggests that the single wall carbon nanotubes (SWCNTs) forming the network survived encapsulation in the ta-C coating. Nano-mechanical testing suggests that the ta-C coated SWCNTN has superior wear performance compared to uncoated SWCNTN.

  18. Method and compositions for the degradation of tributyl phosphate in chemical waste mixtures

    DOE Patents [OSTI]

    Stoner, Daphne L. (Idaho Falls, ID); Tien, Albert J. (Zurich, CH)

    1995-01-01

    A method and process for the degradation of tributyl phosphate in an organic waste mixture and a biologically pure, novel bacteria culture for accomplishing the same. A newly-discovered bacteria (a strain of Acinetobacter sp. ATCC 55587) is provided which is combined in a reactor vessel with a liquid waste mixture containing tributyl phosphate and one or more organic waste compounds capable of functioning as growth substrates for the bacteria. The bacteria is thereafter allowed to incubate within the waste mixture. As a result, the tributyl phosphate and organic compounds within the waste mixture are metabolized (degraded) by the bacteria, thereby eliminating such materials which are environmentally hazardous. In addition, the bacteria is capable of degrading waste mixtures containing high quantities of tributyl phosphate (e.g. up to about 1.0% by weight tributyl phosphate).

  19. Facile synthesis and photoluminescence mechanism of graphene quantum dots

    SciTech Connect (OSTI)

    Yang, Ping; Zhou, Ligang; Zhang, Shenli; Pan, Wei Shen, Wenzhong; Wan, Neng

    2014-12-28

    We report a facile hydrothermal synthesis of intrinsic fluorescent graphene quantum dots (GQDs) with two-dimensional morphology. This synthesis uses glucose, concentrate sulfuric acid, and deionized water as reagents. Concentrated sulfuric acid is found to play a key role in controlling the transformation of as-prepared hydrothermal products from amorphous carbon nanodots to well-crystallized GQDs. These GQDs show typical absorption characteristic for graphene, and have nearly excitation-independent ultraviolet and blue intrinsic emissions. Temperature-dependent PL measurements have demonstrated strong electron-electron scattering and electron-phonon interactions, suggesting a similar temperature behavior of GQDs to inorganic semiconductor quantum dots. According to optical studies, the ultraviolet emission is found to originate from the recombination of electron-hole pairs localized in the C=C bonds, while the blue emission is from the electron transition of sp{sup 2} domains.

  20. Facile and controllable electrochemical reduction of graphene oxide and its applications

    SciTech Connect (OSTI)

    Shao, Yuyan; Wang, Jun; Engelhard, Mark H.; Wang, Chong M.; Lin, Yuehe

    2010-01-01

    Graphene oxide is electrochemically reduced which is called electrochemically reduced graphene oxide (ER-G). ER-G is characterized with scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The oxygen content is significantly decreased and the sp 2 carbon is restored after electrochemical reduction. ER-G exhibits much higher electrochemical capacitance and cycling durability than carbon nanotubes (CNTs) and chemically reduced graphene; the specific capacitance measured with cyclic voltammetry (20 mV/s) is ~165 F/g, ~86 F/g, and ~100 F/g for ER-G, CNTs, and chemically reduced graphene,1 respectively. The electrochemical reduction of oxygen and hydrogen peroxide was greatly enhanced on ER-G electrodes as compared with CNTs. ER-G has shown a good potential for applications in energy storage, biosensors, and electrocatalysis.

  1. Excitonic fine-structure splitting in telecom-wavelength InAs/GaAs quantum dots: Statistical distribution and height-dependence

    SciTech Connect (OSTI)

    Goldmann, Elias Barthel, Stefan; Florian, Matthias; Jahnke, Frank; Schuh, Kolja

    2013-12-09

    The variation of the excitonic fine-structure splitting is studied for semiconductor quantum dots under the influence of a strain-reducing layer, utilized to shift the emission wavelength of the excitonic transition into the telecom-wavelength regime of 1.31.5 ?m. By means of a sp{sup 3}s{sup *}-tight-binding model and configuration interaction, we calculate wavelength shifts and fine-structure splittings for various quantum dot geometries. We find the splittings remaining small and even decreasing with strain-reducing layer composition for quantum dots with large height. Combined with an observed increased emission efficiency, the applicability for generation of entanglement photons is persistent.

  2. Exploration of the El Hoyo-Monte Galan Geothermal Concession. Final report

    SciTech Connect (OSTI)

    1997-12-01

    In January 1996 Trans-Pacific Geothermal Corporation (TGC) was granted a geothermal concession of 114 square kilometers from the Instituto Nicaragueense de Energie (INE) for the purpose of developing between 50 and 150 MWe of geothermal electrical generating capacity. The Concession Agreement required TGC to perform geological, geophysical, and geochemical studies as part of the development program. TGC commenced the geotechnical studies in January 1996 with a comprehensive review of all existing data and surveys. Based on this review, TGC formulated an exploration plan and executed that plan commencing in April, 1996. The ground magnetic (GM), self potential (SP), magnetotelluric/controlled source audio magnetotelluric (MT/CSAMT) and one-meter temperature surveys, data integration, and synthesis of a hydrogeologic model were performed. The purpose of this report is to present a compilation of all data gathered from the geophysical exploration program and to provide an integrated interpretation of that data.

  3. Protein A suppresses immune responses during Staphylococcus aureus bloodstream infection in guinea pigs

    SciTech Connect (OSTI)

    Kim, Hwan Keun; Falugi, Fabiana; Thomer, Lena; Missiakas, Dominique M.; Schneewind, Olaf

    2015-01-06

    Staphylococcus aureus infection is not associated with the development of protective immunity, and disease relapses occur frequently. We hypothesize that protein A, a factor that binds immunoglobulin Fcγ and cross-links VH3 clan B cell receptors (IgM), is the staphylococcal determinant for host immune suppression. To test this, vertebrate IgM was examined for protein A cross-linking. High VH3 binding activity occurred with human and guinea immunoglobulin, whereas mouse and rabbit immunoglobulins displayed little and no binding, respectively. Establishing a guinea pig model of S. aureus bloodstream infection, we show that protein A functions as a virulence determinant and suppresses host B cell responses. Immunization with SpAKKAA, which cannot bind immunoglobulin, elicits neutralizing antibodies that enable guinea pigs to develop protective immunity.

  4. GV DTit

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    £c £iV£d GV DTit «0- i3?0 ■ Comparison of 3D Classical Trajectory and Transition-State Theory Reaction Cross Sections t . ' G. W. Koeppl and M. Karplus Department of Chemistry, Harvard University Cambridge, Massachusetts 02138 -------------------------- L E G A L N O T I C E --------------------------- T h is r e p o r t was p re p a re d as an a c c o u n t o f w o rk sp onsored b y th e U n ite d S tates G o v e rn m e n t. N e ith e r th e U n ite d States n o r th e U n ite d S tates A

  5. Method and compositions for the degradation of tributyl phosphate in chemical waste mixtures

    DOE Patents [OSTI]

    Stoner, D.L.; Tien, A.J.

    1995-09-26

    A method and process are disclosed for the degradation of tributyl phosphate in an organic waste mixture and a biologically pure, novel bacteria culture for accomplishing the same. A newly-discovered bacteria (a strain of Acinetobacter sp. ATCC 55587) is provided which is combined in a reactor vessel with a liquid waste mixture containing tributyl phosphate and one or more organic waste compounds capable of functioning as growth substrates for the bacteria. The bacteria is thereafter allowed to incubate within the waste mixture. As a result, the tributyl phosphate and organic compounds within the waste mixture are metabolized (degraded) by the bacteria, thereby eliminating such materials which are environmentally hazardous. In addition, the bacteria is capable of degrading waste mixtures containing high quantities of tributyl phosphate (e.g. up to about 1.0% by weight tributyl phosphate). 6 figs.

  6. Parallel Scaling Characteristics of Selected NERSC User ProjectCodes

    SciTech Connect (OSTI)

    Skinner, David; Verdier, Francesca; Anand, Harsh; Carter,Jonathan; Durst, Mark; Gerber, Richard

    2005-03-05

    This report documents parallel scaling characteristics of NERSC user project codes between Fiscal Year 2003 and the first half of Fiscal Year 2004 (Oct 2002-March 2004). The codes analyzed cover 60% of all the CPU hours delivered during that time frame on seaborg, a 6080 CPU IBM SP and the largest parallel computer at NERSC. The scale in terms of concurrency and problem size of the workload is analyzed. Drawing on batch queue logs, performance data and feedback from researchers we detail the motivations, benefits, and challenges of implementing highly parallel scientific codes on current NERSC High Performance Computing systems. An evaluation and outlook of the NERSC workload for Allocation Year 2005 is presented.

  7. The GC-Rich Mitochondrial and Plastid Genomes of the Green Alga Coccomyxa Give Insight into the Evolution of Organelle DNA Nucleotide Landscape

    SciTech Connect (OSTI)

    Smith, David Roy; Burki, Fabien; Yamada, Takashi; Grimwood, Jane; Grigoriev, Igor V.; Van Etten, James L.; Keeling, Patrick J.

    2011-05-13

    Most of the available mitochondrial and plastid genome sequences are biased towards adenine and thymine (AT) over guanine and cytosine (GC). Examples of GC-rich organelle DNAs are limited to a small but eclectic list of species, including certain green algae. Here, to gain insight in the evolution of organelle nucleotide landscape, we present the GC-rich mitochondrial and plastid DNAs from the trebouxiophyte green alga Coccomyxa sp. C-169. We compare these sequences with other GC-rich organelle DNAs and argue that the forces biasing them towards G and C are nonadaptive and linked to the metabolic and/or life history features of this species. The Coccomyxa organelle genomes are also used for phylogenetic analyses, which highlight the complexities in trying to resolve the interrelationships among the core chlorophyte green algae, but ultimately favour a sister relationship between the Ulvophyceae and Chlorophyceae, with the Trebouxiophyceae branching at the base of the chlorophyte crown.

  8. Refractory alloy technology for space nuclear power applications

    SciTech Connect (OSTI)

    Cooper, R.H. Jr.; Hoffman, E.E.

    1984-01-01

    Purpose of this symposium is twofold: (1) to review and document the status of refractory alloy technology for structural and fuel-cladding applications in space nuclear power systems, and (2) to identify and document the refractory alloy research and development needs for the SP-100 Program in both the short and the long term. In this symposium, an effort was made to recapture the space reactor refractory alloy technology that was cut off in midstream around 1973 when the national space nuclear reactor program began in the early 1960s, was terminated. The six technical areas covered in the program are compatibility, processing and production, welding and component fabrication, mechanical and physical properties, effects of irradiation, and machinability. The refractory alloys considered are niobium, molybdenum, tantalum, and tungsten. Thirteen of the 14 pages have been abstracted separately. The remaining paper summarizes key needs for further R and D on refractory alloys. (DLC)

  9. Sandia PUF Analysis Tool

    Energy Science and Technology Software Center (OSTI)

    2014-06-11

    This program is a graphical user interface for measuring and performing inter-active analysis of physical unclonable functions (PUFs). It is intended for demonstration and education purposes. See license.txt for license details. The program features a PUF visualization that demonstrates how signatures differ between PUFs and how they exhibit noise over repeated measurements. A similarity scoreboard shows the user how close the current measurement is to the closest chip signatures in the database. Other metrics suchmore » as average noise and inter-chip Hamming distances are presented to the user. Randomness tests published in NIST SP 800-22 can be computed and displayed. Noise and inter-chip histograms for the sample of PUFs and repeated PUF measurements can be drawn.« less

  10. Characterization of protein redox dynamics induced during light-to-dark transitions and nutrient limitation in cyanobacteria

    SciTech Connect (OSTI)

    Ansong, Charles; Sadler, Natalie C.; Hill, Eric A.; Lewis, Michael P.; Zink, Erika M.; Smith, Richard D.; Beliaev, Alex S.; Konopka, Allan; Wright, Aaron T.

    2014-07-03

    Protein redox chemistry constitutes a major void in knowledge pertaining to photoautotrophic system regulation and signaling processes. We have employed a chemical biology approach to analyze redox sensitive proteins in live Synechococcus sp. PCC 7002 cells in both light and dark periods, and to understand how cellular redox balance is disrupted during nutrient perturbation. The present work identified several novel putative redox-sensitive proteins that are involved in the generation of reductant, macromolecule synthesis, and carbon flux through central metabolic pathways, and may be involved in cell signaling and response mechanisms. Furthermore, our research suggests that dynamic redox changes in response to specific nutrient limitations contribute to the regulatory changes driven by a shift from light to dark. Taken together, these results contribute to the high-level understanding of post-translational mechanisms regulating flux distributions and therefore present potential metabolic engineering targets for redirecting carbon towards biofuel precursors.

  11. INSTITUTE OF PHYSICS PUBLISHING

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    684-1692 PII: S0029-5515(03)70949-1 Tokamak-like confinement at a high beta and low toroidal field in the MST reversed field pinch* J.S. Sarff 1 , A.F. Almagri 1 , J.K. Anderson 1 , T.M. Biewer 1 , A.P. Blair 1 , M. Cengher 1 , B.E. Chapman 1 , P.K. Chattopadhyay 1 , D. Craig 1 , D.J. Den Hartog 1 , F. Ebrahimi 1 , G. Fiksel 1 , C.B. Forest 1 , J.A. Goetz 1 , D. Holly 1 , B. Hudson 1 , T.W. Lovell 1 , K.J. McCollam 1 , P.D. Nonn 1 , R. O'Connell 1 , S.P. Oliva 1 , S.C. Prager 1 , J.C. Reardon 1

  12. Comparative Genome Analysis of Basidiomycete Fungi

    SciTech Connect (OSTI)

    Riley, Robert; Salamov, Asaf; Morin, Emmanuelle; Nagy, Laszlo; Manning, Gerard; Baker, Scott; Brown, Daren; Henrissat, Bernard; Levasseur, Anthony; Hibbett, David; Martin, Francis; Grigoriev, Igor

    2012-03-19

    Fungi of the phylum Basidiomycota (basidiomycetes), make up some 37percent of the described fungi, and are important in forestry, agriculture, medicine, and bioenergy. This diverse phylum includes the mushrooms, wood rots, symbionts, and plant and animal pathogens. To better understand the diversity of phenotypes in basidiomycetes, we performed a comparative analysis of 35 basidiomycete fungi spanning the diversity of the phylum. Phylogenetic patterns of lignocellulose degrading genes suggest a continuum rather than a sharp dichotomy between the white rot and brown rot modes of wood decay. Patterns of secondary metabolic enzymes give additional insight into the broad array of phenotypes found in the basidiomycetes. We suggest that the profile of an organism in lignocellulose-targeting genes can be used to predict its nutritional mode, and predict Dacryopinax sp. as a brown rot; Botryobasidium botryosum and Jaapia argillacea as white rots.

  13. Crystal structure of 1-methyl-3-([2,2-dimethyl-4,6-dioxo-1,3-dioxane-5-ylidene]methyl)urea

    SciTech Connect (OSTI)

    Habibi, A. Ghorbani, H. S.; Bruno, G.; Rudbari, H. A.; Valizadeh, Y.

    2013-12-15

    The crystal structure of 1-Methyl-3-([2,2-dimethyl-4,6-dioxo-1,3-dioxane-5-ylidene]methyl)urea (C{sub 9}H{sub 12}N{sub 2}O{sub 5}) has been determined by single crystal X-ray diffraction analysis. The crystals are monoclinic, a = 5.3179(2), b = 18.6394(6), c =10.8124(3) , ? = 100.015(2), Z = 4, sp. gr. P2{sub 1}/c, R = 0.0381 for 2537 reflections with I > 2?(I). Except for C(CH{sub 3}){sub 2} group, the molecule is planar. The structure is stabilized by inter- and intramolecular N-H...O hydrogen bonds and weak C-H...O interactions.

  14. Single-Sector Supersymmetry Breaking, Chirality, and Unification

    SciTech Connect (OSTI)

    Behbahani, Siavosh R.; Craig, Nathaniel; Torroba, Gonzalo; /SLAC /Stanford U., Phys. Dept.

    2011-08-12

    Calculable single-sector models provide an elegant framework for generating the flavor textures via compositeness, breaking supersymmetry, and explaining the electroweak scale. Such models may be realized naturally in supersymmetric QCD with additional gauge singlets (SSQCD), though it remains challenging to construct models without a surfeit of light exotic states where the Standard Model index emerges naturally. We classify possible single-sector models based on Sp confining SSQCD according to their Standard Model index and number of composite messengers. This leads to simple, calculable models that spontaneously break supersymmetry, reproduce the fermion flavor hierarchy, and explain the Standard Model index dynamically with little or no additional matter. At low energies these theories realize a 'more minimal' soft spectrum with direct mediation and a gravitino LSP.

  15. U.S. Support Program tasks

    SciTech Connect (OSTI)

    Langner, D.G.

    1998-09-01

    In the fall of 1993, President Clinton announced before the United Nations General Assembly, that the US would voluntarily offer excess fissile material of weapons origin to International Atomic Energy Agency (IAEA) safeguards. There are presently five US Support Program tasks at work. Three are complete, and two are underway. Reports are available from two of the completed SP-1s; a draft is in preparation for the third. These tasks are: (1) plutonium scrap multiplicity counter at Hanford; (2) calorimeter authentication at Hanford; (3) large neutron multiplicity counter at Rocky Flats; (4) calorimeter authentication at Rocky Flats; and (5) safeguards approach support at the APSF, SRS. The status of the first four tasks above is described here. Information on the work at Savannah River is contained in a separate paper.

  16. Interaction of vacuum ultraviolet light with a low-k organosilicate glass film in the presence of NH{sub 3}

    SciTech Connect (OSTI)

    Behera, Swayambhu; Lee, Joe; Graves, David; Gaddam, Sneha; Pokharel, Sundari; Wilks, Justin; Pasquale, Frank; Kelber, Jeffry A.

    2010-07-19

    In situ x-ray photoemission spectroscopy (XPS) and ex situ Fourier transform infrared spectroscopy (FTIR) were used to characterize effects on organosilicate films of 147 nm irradiation in the presence of 10{sup -4} Torr NH{sub 3}. XPS and FTIR data indicate Si-O and Si-C bond scission, with nitridation only at Si sites. Photoirradiation causes the surface layer to become enriched in sp{sup 2} carbon. FTIR spectra of silanol formation upon exposure to ambient indicate reactive sites in the bulk have lifetimes of up to six days. XPS data indicate lifetimes of approxminutes for surface states. Nitrogen uptake passivates with longer exposure times, indicating surface densification.

  17. Palynostratigraphy of the Erkovtsy field of brown coal (the Zeya-Bureya sedimentary basin)

    SciTech Connect (OSTI)

    Kezina, T.V.; Litvinenko, N.D.

    2007-08-15

    The Erkovtsy brown coal field in the northwestern Zeya-Bureya sedimentary basin (129-130{sup o}E, 46-47{sup o}N) is structurally confined to southern flank of the Mesozoic-Cenozoic Belogor'e depression. The verified stratigraphic scheme of the coalfield sedimentary sequence is substantiated by palynological data on core samples from 18 boreholes sampled in the course of detailed prospecting and by paleobotanical analysis of sections in the Yuzhnyi sector of the coalfield (data of 1998 by M.A. Akhmetiev and S.P. Manchester). Sections of the Erkovtsy, Arkhara-Boguchan, and Raichikha brown-coal mines are correlated. Stratigraphic subdivisions distinguished in the studied sedimentary succession are the middle and upper Tsagayan subformations (the latter incorporating the Kivda Beds), Raichikha, Mukhino, Buzuli, and Sazanka formations.

  18. Protein A suppresses immune responses during Staphylococcus aureus bloodstream infection in guinea pigs

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kim, Hwan Keun; Falugi, Fabiana; Thomer, Lena; Missiakas, Dominique M.; Schneewind, Olaf

    2015-01-06

    Staphylococcus aureus infection is not associated with the development of protective immunity, and disease relapses occur frequently. We hypothesize that protein A, a factor that binds immunoglobulin Fcγ and cross-links VH3 clan B cell receptors (IgM), is the staphylococcal determinant for host immune suppression. To test this, vertebrate IgM was examined for protein A cross-linking. High VH3 binding activity occurred with human and guinea immunoglobulin, whereas mouse and rabbit immunoglobulins displayed little and no binding, respectively. Establishing a guinea pig model of S. aureus bloodstream infection, we show that protein A functions as a virulence determinant and suppresses host Bmore » cell responses. Immunization with SpAKKAA, which cannot bind immunoglobulin, elicits neutralizing antibodies that enable guinea pigs to develop protective immunity.« less

  19. Status Report on the Microbial Characterization of Halite and Groundwater Samples from the WIPP

    SciTech Connect (OSTI)

    Swanson, Juliet S.; Reed, Donald T.; Ams, David A.; Norden, Diana; Simmons, Karen A.

    2012-07-10

    This report summarizes the progress made in the ongoing task of characterizing the microbial community structures within the WIPP repository and in surrounding groundwaters. Through cultivation and DNA-based identification, the potential activity of these organisms is being inferred, thus leading to a better understanding of their impact on WIPP performance. Members of the three biological domains - Bacteria, Archaea, and Eukarya (in this case, Fungi) - that are associated with WIPP halite have been identified. Thus far, their activity has been limited to aerobic respiration; anaerobic incubations are underway. WIPP halite constitutes the near-field microbial environment. We expect that microbial activity in this setting will proceed from aerobic respiration, through nitrate reduction to focus on sulfate reduction. This is also the current WIPP performance assessment (PA) position. Sulfate reduction can occur at extremely high ionic strengths, and sulfate is available in WIPP brines and in the anhydrite interbeds. The role of methanogenesis in the WIPP remains unclear, due to both energetic constraints imposed by a high-salt environment and substrate selectivity, and it is no longer considered in PA. Archaea identified in WIPP halite thus far fall exclusively within the family Halobacteriaceae. These include Halobacterium noricense, cultivated from both low- and high-salt media, and a Halorubrum-like species. The former has also been detected in other salt mines worldwide; the latter likely constitutes a new species. Little is known of its function, but it was prevalent in experiments investigating the biodegradation of organic complexing agents in WIPP brines. Bacterial signatures associated with WIPP halite include members of the phylum Proteobacteria - Halomonas, Pelomonas, Limnobacter, and Chromohalobacter - but only the latter has been isolated. Also detected and cultivated were Salinicoccus and Nesterenkonia spp. Fungi were also isolated from halite. Although these were most likely introduced into the WIPP as contaminants from above-ground, their survival and potential role in the WIPP (e.g., cellulose degradation) is under investigation. WIPP groundwaters comprise the far-field microbial environment. Bacteria cultivated and identified from the overlying Culebra and nearby borehole groundwater are capable of aerobic respiration, denitrification, fermentation, metal reduction, and sulfate reduction and are distributed across many different phyla. Two of the Bacteria found in groundwater were also found in WIPP halite (Chromohalobacter sp. and Virgibacillus sp.). Archaea identified in groundwater include Halococcus saccharolyticus, Haloferax sp., and Natrinema sp. The differences in the microbial communities detected thus far in halite and groundwater suggest that there will be significant differences in the associated metabolic potential of the near- and far-field environments. Whereas the near-field is dominated by Archaea with more limited metabolic capabilities, the far-field is dominated by Bacteria with extremely broad capabilities. Because the majority of the repository's lifetime will be anoxic, ongoing and future work focuses on the presence and role of anaerobic organisms in WIPP. Further tasks on biosorption, cellulose degradation, and bioreduction are being performed using organisms obtained from this characterization work.

  20. Band structure engineering through orbital interaction for enhanced thermoelectric power factor

    SciTech Connect (OSTI)

    Zhu, Hong; Sun, Wenhao; Ceder, Gerbrand; Armiento, Rickard; Lazic, Predrag

    2014-02-24

    Band structure engineering for specific electronic or optical properties is essential for the further development of many important technologies including thermoelectrics, optoelectronics, and microelectronics. In this work, we report orbital interaction as a powerful tool to finetune the band structure and the transport properties of charge carriers in bulk crystalline semiconductors. The proposed mechanism of orbital interaction on band structure is demonstrated for IV-VI thermoelectric semiconductors. For IV-VI materials, we find that the convergence of multiple carrier pockets not only displays a strong correlation with the s-p and spin-orbit coupling but also coincides with the enhancement of power factor. Our results suggest a useful path to engineer the band structure and an enticing solid-solution design principle to enhance thermoelectric performance.

  1. Carbon-based Supercapacitors Produced by Activation of Graphene

    SciTech Connect (OSTI)

    Y Zhu; S Murali; M Stoller; K Ganesh; W Cai; P Ferreira; A Pirkle; R Wallace; K Cychosz; et al.

    2011-12-31

    Supercapacitors, also called ultracapacitors or electrochemical capacitors, store electrical charge on high-surface-area conducting materials. Their widespread use is limited by their low energy storage density and relatively high effective series resistance. Using chemical activation of exfoliated graphite oxide, we synthesized a porous carbon with a Brunauer-Emmett-Teller surface area of up to 3100 square meters per gram, a high electrical conductivity, and a low oxygen and hydrogen content. This sp{sup 2}-bonded carbon has a continuous three-dimensional network of highly curved, atom-thick walls that form primarily 0.6- to 5-nanometer-width pores. Two-electrode supercapacitor cells constructed with this carbon yielded high values of gravimetric capacitance and energy density with organic and ionic liquid electrolytes. The processes used to make this carbon are readily scalable to industrial levels.

  2. Carbon-Based Supercapacitors Produced by Activation of Graphene

    SciTech Connect (OSTI)

    Zhu, Y.; Su, D.; Murali, S.; Stoller, M.D.; Ganesh, K.J.; Cai, W.; Ferreira, P.J.; Pirkle, A.; Wallace, R.M.; Cychosz, K.A., Thommes, M.; Stach, E.A.; Ruoff, R.S.

    2011-06-24

    Supercapacitors, also called ultracapacitors or electrochemical capacitors, store electrical charge on high-surface-area conducting materials. Their widespread use is limited by their low energy storage density and relatively high effective series resistance. Using chemical activation of exfoliated graphite oxide, we synthesized a porous carbon with a Brunauer-Emmett-Teller surface area of up to 3100 square meters per gram, a high electrical conductivity, and a low oxygen and hydrogen content. This sp{sup 2}-bonded carbon has a continuous three-dimensional network of highly curved, atom-thick walls that form primarily 0.6- to 5-nanometer-width pores. Two-electrode supercapacitor cells constructed with this carbon yielded high values of gravimetric capacitance and energy density with organic and ionic liquid electrolytes. The processes used to make this carbon are readily scalable to industrial levels.

  3. A:>

    Office of Legacy Management (LM)

    . . _I' , .-' h!i "?, -I) i -, E"V*J i . A:> (5 1 .f *Pi . .I, , -, .,**+ : ,.' * y n c I ~~ci,.co::i: 2 $ a;;3 j.:&wt CZIX' F!!:"" co\1;L35y, ,. ' I I?* J. SmFth, Jr * 3 f&j.!3f, j.2jL3calklilH-m~ c$xwa SXLEJ j!lmAf , I .+..i' pro~.iuct:?on Divid.cu l,jLo ~~SpC~js~~~;E' ~(~ y()R lJ#.J$.jIUX EU& ~&WRICATIO~C PilCGRlY3 1. S'%..I3OLs po:33s :bh . As you ar,o &w~E), ljm at :.jk. ';;i, E, ~:a~ay's rsq,uest hss ur:ckrt:km &he respapsJ.bilit:y of

  4. ERYLFIUM OM PANY

    Office of Legacy Management (LM)

    ERYLFIUM OM PANY 3714 CI-XIESTER /%"EXUE J &CO-74 -L;s C+SSIFICATION CANCELLED OR April 22, 1947 Dear 3. 3elmore: Xith reference to Contract X- 7401 ens 78, supp1emstit 11 calJi?Jg for 5000 pounds of SP ?eO 1350X, we have shipped 5000 pounds to the A. C. Spark E' lU~ co. in i?int i~i0hige.n. There were two s!lipi%ents made against this order. GE/L Kc. The first shipmast was ;lade on i.i)ril 12, ,A947 via ~rnili7c.y eqress on K,' -23305 copies .;; -"5 and ~$7 of which are enclosed.

  5. XK-JPH-1l.l

    Office of Legacy Management (LM)

    5% "y$ XK-JPH-1l.l li/ Consisting of % pages containing 0 figures Copy No.&of 2 copies. Series A - September 9, IS43 , -- ' ! c 0 d ii?4 1 2 ' 2 2 4 4 ' 2 F! 9 2 4 :3 SP 2 z=o 4 kn 2 i 2 2 $$4 2 i?x 2 1: w 2: 4 To: J. Chipman !?DXl: JohnP.Howe . In Ret Visit to Grasselli Laboratories, Cleveland, Ohio, August 30, 1945 &is neeting va8 the uguLil done at the Grasselli Laboratories. flOT DIP - reported by 3. R Boll@r Double Ja&eting biweekly review of the coating work Tests on

  6. Multicomponent Protein Cage Architectures for Photocatalysis

    SciTech Connect (OSTI)

    Douglas, Trevor

    2014-11-21

    The central focus of the work performed under this award has been to develop the bacteriophage P22 viral capsid as a vehicle for the encapsulation of catalyticaly active cargo materials and study their utility towards economic energy harvesting systems. We have demonstrated that the capsid of the bacteriophage P22 can be used to genetically program the assembly and encapsulation of a range of inorganic nanoparticles and protein cargoes. The P22 capsid uses a scaffold protein (SP) to direct the assembly of its coat protein (CP) into icosahedral capsids. By creating a genetic fusion of a desired cargo enzyme or a small peptide that can act as a nucleation site for subsequent NP growth, we have demonstrated the co-assembly of these SP-fusions and CP into stable nano-reactors. The cargo is sequestered inside the engineered capsid and can either be used directly as a nanocatalyst or for the nucleation and growth of inorganic or organic nanoparticles or polymers. The synthetic cargos (NP or polymers) were shown to have photocatalytic activity. The time dependent photophysics of a select few of these systems were studied to determine the underlying mechanisms and efficiency of light harversting. Enzyme cargos encapsulated within the P22 were thermally activated catalysts and their kinetic behavior was characterized. During the course of this work we have demonstrated that the method is a robust means to harness biology for materials applications and have initiated work into assembling the P22 nanoreactors into hierarchically ordered materials. The successful implementation of the work performed under this DOE grant provides us with a great deal of knowledge and a library of components to go forward towards the development of bioinspired catalytic materials for energy harvesting.

  7. Toxin content and cytotoxicity of algal dietary supplements

    SciTech Connect (OSTI)

    Heussner, A.H.; Mazija, L.; Fastner, J.; Dietrich, D.R.

    2012-12-01

    Blue-green algae (Spirulina sp., Aphanizomenon flos-aquae) and Chlorella sp. are commercially distributed as organic algae dietary supplements. Cyanobacterial dietary products in particular have raised serious concerns, as they appeared to be contaminated with toxins e.g. microcystins (MCs) and consumers repeatedly reported adverse health effects following consumption of these products. The aim of this study was to determine the toxin contamination and the in vitro cytotoxicity of algae dietary supplement products marketed in Germany. In thirteen products consisting of Aph. flos-aquae, Spirulina and Chlorella or mixtures thereof, MCs, nodularins, saxitoxins, anatoxin-a and cylindrospermopsin were analyzed. Five products tested in an earlier market study were re-analyzed for comparison. Product samples were extracted and analyzed for cytotoxicity in A549 cells as well as for toxin levels by (1) phosphatase inhibition assay (PPIA), (2) Adda-ELISA and (3) LCMS/MS. In addition, all samples were analyzed by PCR for the presence of the mcyE gene, a part of the microcystin and nodularin synthetase gene cluster. Only Aph. flos-aquae products were tested positive for MCs as well as the presence of mcyE. The contamination levels of the MC-positive samples were ? 1 ?g MC-LR equivalents g{sup ?1} dw. None of the other toxins were found in any of the products. However, extracts from all products were cytotoxic. In light of the findings, the distribution and commercial sale of Aph. flos-aquae products, whether pure or mixed formulations, for human consumption appear highly questionable. -- Highlights: ? Marketed algae dietary supplements were analyzed for toxins. ? Methods: Phosphatase inhibition assay (PPIA), Adda-ELISA, LC-MS/MS. ? Aph. flos-aquae products all tested positive for microcystins. ? Products tested negative for nodularins, saxitoxins, anatoxin-a, cylindrospermopsin. ? Extracts from all products were cytotoxic.

  8. Soot Particle Studies - Instrument Inter-Comparison Project Overview

    SciTech Connect (OSTI)

    Cross, E.; Sedlacek, A.; Onasch, T. B.; Ahern, A.; Wrobel, W.; Slowik, J. G.; Olfert, J.; Lack, D. A.; Massoli, P.; Cappa, C. D.; Schwarz, J.; Spackman, J. R.; Fahey, D. W.; Trimborn, A.; Jayne, J. T.; Freedman, A.; Williams, L. R.; Ng, N. L.; Mazzoleni, C.; Dubey, M.; Brem, B.; Kok, G.; Subramanian, R.; Freitag, S.; Clarke, A.; Thornhill, D.; Marr, L.; Kolb, C. E.; Worsnop, D. R.; Davidovits, P.

    2010-03-06

    An inter-comparison study of instruments designed to measure the microphysical and optical properties of soot particles was completed. The following mass-based instruments were tested: Couette Centrifugal Particle Mass Analyzer (CPMA), Time-of-Flight Aerosol Mass Spectrometer - Scanning Mobility Particle Sizer (AMS-SMPS), Single Particle Soot Photometer (SP2), Soot Particle-Aerosol Mass Spectrometer (SP-AMS) and Photoelectric Aerosol Sensor (PAS2000CE). Optical instruments measured absorption (photoacoustic, interferometric, and filter-based), scattering (in situ), and extinction (light attenuation within an optical cavity). The study covered an experimental matrix consisting of 318 runs that systematically tested the performance of instruments across a range of parameters including: fuel equivalence ratio (1.8 {le} {phi} {le} 5), particle shape (mass-mobility exponent (D{sub f m}), 2.0 {le} D{sub f m} {le} 3.0), particle mobility size (30 {le} d{sub m} {le} 300 nm), black carbon mass (0.07 {le} m{sub BC} {le} 4.2 fg) and particle chemical composition. In selected runs, particles were coated with sulfuric acid or dioctyl sebacate (DOS) (0.5 {le} {Delta}r{sub ve} {le} 201 nm) where {Delta}r{sub ve} is the change in the volume equivalent radius due to the coating material. The effect of non-absorbing coatings on instrument response was determined. Changes in the morphology of fractal soot particles were monitored during coating and denuding processes and the effect of particle shape on instrument response was determined. The combination of optical and mass based measurements was used to determine the mass specific absorption coefficient for denuded soot particles. The single scattering albedo of the particles was also measured. An overview of the experiments and sample results are presented.

  9. A Gas-Cooled Reactor Surface Power System

    SciTech Connect (OSTI)

    Harms, G.A.; Lenard, R.X.; Lipinski, R.J.; Wright, S.A.

    1998-11-09

    A human outpost on Mars requires plentiful power to assure survival of the astronauts. Anywhere from 50 to 500 kW of electric power (kWe) will be needed, depending on the number of astronauts, level of scientific activity, and life- cycle closure desired. This paper describes a 250-kWe power system based on a gas-cooled nuclear reactor with a recuperated closed Brayton cycle conversion system. The design draws upon the extensive data and engineering experience developed under the various high-temperature gas cooled reactor programs and under the SP-100 program. The reactor core is similar in power and size to the research reactors found on numerous university campuses. The fuel is uranium nitide clad in Nb 1 %Zr, which has been extensively tested under the SP-I 00 program The fiel rods are arranged in a hexagonal array within a BeO block. The BeO softens the spectrum, allowing better use of the fbel and stabilizing the geometty against deformation during impact or other loadings. The system has a negative temperature feedback coefficient so that the power level will automatically follow a variable load without the need for continuous adjustment of control elements. Waste heat is removed by an air-cooled heat exchanger using cold Martian air. The amount of radioactivity in the reactor at launch is very small (less than a Curie, and about equal to a truckload of uranium ore). The system will need to be engineered so that criticality cannot occur for any launch accident. This system is also adaptable for electric propulsion or life-support during transit to and from Mars.

  10. Modeling Fission Product Sorption in Graphite Structures

    SciTech Connect (OSTI)

    Szlufarska, Izabela; Morgan, Dane; Allen, Todd

    2013-04-08

    The goal of this project is to determine changes in adsorption and desorption of fission products to/from nuclear-grade graphite in response to a changing chemical environment. First, the project team will employ principle calculations and thermodynamic analysis to predict stability of fission products on graphite in the presence of structural defects commonly observed in very high- temperature reactor (VHTR) graphites. Desorption rates will be determined as a function of partial pressure of oxygen and iodine, relative humidity, and temperature. They will then carry out experimental characterization to determine the statistical distribution of structural features. This structural information will yield distributions of binding sites to be used as an input for a sorption model. Sorption isotherms calculated under this project will contribute to understanding of the physical bases of the source terms that are used in higher-level codes that model fission product transport and retention in graphite. The project will include the following tasks: Perform structural characterization of the VHTR graphite to determine crystallographic phases, defect structures and their distribution, volume fraction of coke, and amount of sp2 versus sp3 bonding. This information will be used as guidance for ab initio modeling and as input for sorptivity models; Perform ab initio calculations of binding energies to determine stability of fission products on the different sorption sites present in nuclear graphite microstructures. The project will use density functional theory (DFT) methods to calculate binding energies in vacuum and in oxidizing environments. The team will also calculate stability of iodine complexes with fission products on graphite sorption sites; Model graphite sorption isotherms to quantify concentration of fission products in graphite. The binding energies will be combined with a Langmuir isotherm statistical model to predict the sorbed concentration of fission products on each type of graphite site. The model will include multiple simultaneous adsorbing species, which will allow for competitive adsorption effects between different fission product species and O and OH (for modeling accident conditions).

  11. A symmetry reduction scheme of the Dirac algebra without dimensional defects

    SciTech Connect (OSTI)

    Dahm, R.

    2010-02-15

    In relating the Dirac algebra to homogeneous coordinates of a projective geometry, we present a simple geometric scheme which allows to identify various Lie algebras and Lie groups well-known from classical physics as well as from quantum field theory. We introduce a 1 -point-compactification and quaternionic Moebius transformations, and we use SU* (4) and a symmetry reduction scheme without dimensional defects to identify transformations and particle representations thoroughly. As such, two subsequent nonlinear {sigma} models SU*(4)/U Sp(4) and U Sp(4)/SU(2) x U(1) emerge as well as a possible double coset decomposition of SU*(4) with respect to SU(2) x U(1). Whereas the first model leads to equivalence classes of hyperbolic manifolds and naturally introduces coordinates and velocities, the second coset model leads to a Hermitian symmetric (vector) space (Kaehlerian space) of real dimension 6, i.e., to a 3-dimensional complex space with a global symplectic and a local SU(2) x U(1) symmetry which allows to identify the (local) gauge group of electroweak interactions as well as under certain assumptions it admits compact SU(3) transformations as automorphisms of this 3-dimensional (hyper)complex vector space. In the limit of low energies, this geometric SU*(4) scheme naturally yields the (compact) group SU(4) to describe 'chiral symmetry' and conserved isospin of hadrons as well as the low-dimensional hadron representations. Last not least, with respect to some of the SU*(4) generators we find a multiplication table which (up to signs) is identical with the octonions represented in the Fano plane.

  12. EGFR tyrosine kinase inhibitory peptide attenuates Helicobacter pylori-mediated hyper-proliferation in AGS enteric epithelial cells

    SciTech Connect (OSTI)

    Himaya, S.W.A.; Dewapriya, Pradeep; Kim, Se-Kwon

    2013-06-15

    Helicobacter pylori infection is one of the most critical causes of stomach cancer. The current study was conducted to explore the protective effects of an isolated active peptide H-P-6 (Pro-Gln-Pro-Lys-Val-Leu-Asp-Ser) from microbial hydrolysates of Chlamydomonas sp. against H. pylori-induced carcinogenesis. The peptide H-P-6 has effectively suppressed H. pylori-induced hyper-proliferation and migration of gastric epithelial cells (AGS). However, the peptide did not inhibit the viability of the bacteria or invasion into AGS cells. Therefore, the effect of the peptide on regulating H. pylori-induced molecular signaling was investigated. The results indicated that H. pylori activates the EGFR tyrosine kinase signaling and nuclear translocation of the ?-catenin. The EGFR activation has led to the up-regulation of PI3K/Akt signaling pathway. Moreover, the nuclear translocation levels of ?-catenin were significantly increased as a result of Akt mediated down-regulation of GSK3/? protein levels in the cytoplasm. Both of these consequences have resulted in increased expression of cell survival and migration related genes such as c-Myc, cyclin-D, MMP-2 and matrilysin. Interestingly, the isolated peptide potently inhibited H. pylori-mediated EGFR activation and thereby down-regulated the subsequent P13K/Akt signaling leading to ?-catenin nuclear translocation. The effect of the peptide was confirmed with the use of EGFR tyrosine kinase inhibitor AG1487 and molecular docking studies. Collectively this study identifies a potent peptide which regulates the H. pylori-induced hyper-proliferation and migration of AGS cells at molecular level. - Highlights: Chlamydomonas sp. derived peptide H-P-6 inhibits H. pylori-induced pathogenesis. H-P-6 suppresses H. pylori-induced hyper-proliferation and migration of AGS cells. The peptide inhibits H. pylori-induced EGFR activation.

  13. Paleoenvironment of the Ogallala (Neogene) Formation in west-central Kansas

    SciTech Connect (OSTI)

    Twiss, P.C.; McCahon, T.J.; Oviatt, C.G. . Geology Dept.)

    1993-02-01

    At Lake Scott (Scott County) in west-central Kansas, the Ogallala Formation unconformably overlies the Niobrara Formation (Cretaceous) and forms the bluffs of the north-trending Ladder Creek valley. Two sections (Devil's Backbone, 23 m thick; Suicide Bluff, 45 m thick) contain fluvial sands that grade upward into probable eolian sands. The lower sections contain poorly cemented, moderately sorted, arkosic sand, some mud gravel, and poorly defined fluvial channels. In the lower part of Devil's Backbone, cross-bedded sand is capped by mud drapes. At Suicide Bluff, beds of cross-bedded and better sorted sand occur high in the section. Paleosols and secondary calcite and opal dominate the sections. Pedogenic calcretes with more than 52% CaCO[sub 3] are especially abundant and range up to morphologic Stage VI. The [delta][sup 13]C and [delta][sup 18]O in the calcretes range from [minus]4.8 to [minus]6.5 and [minus]8.2 to [minus]6.7 per mil (PDB), respectively. Opal-A has replaced most rhizoliths of the Ogallala. Silicified fossil seeds (Celtis sp., Biorbia sp.) and probable fossil mammal burrows also occur in the sections. Rhyolitic tephra, about 10 Ma, occurs 12 m below the calcrete caprock of Suicide Bluff. A massive layer of opal occurs about 8 m above the tephra and below a diatomaceous bed. Siliceous cement occurs throughout each section, possibly originating from opal phytoliths, tephra, and/or diatoms. These sections afford the potential for understanding the stratigraphic succession and paleoclimate during the late Miocene to possibly early Pliocene in the central High Plains region.

  14. Development of Bypassed Oil Reserves Using Behind Casing Resistivity Measurements

    SciTech Connect (OSTI)

    Michael G. Conner

    2004-02-14

    Tubing and rods of the S.P. Pedro-Nepple No.1 well were pulled and the well was prepared for running of Schlumberger's Cased Hole Formation Resistivity Tool (CHFR) in selected intervals. The CHFR tool was successfully run and data was captured. The CHFR formation resistivity readings were compared to original open hole resistivity measurements. Separation between the original and CHFR resistivity curves indicate both swept and un-swept sand intervals. Both watered out sand intervals and those with higher remaining oil saturation have been identified. Due to the nature of these turbidite sands being stratigraphically continuous, both the swept and unswept layers have been correlated across to one of the four nearby offset shallow wells. As a result of the cased hole logging, one well was selected for a workover to recomplete and test suspected oil saturated shallow sand intervals. Well S.P. Pedro-Nepple No.2 was plugged back with cement excluding the previously existing production interval, squeeze cemented behind casing, selectively perforated in the shallower ''Bell'' zone and placed on production to develop potential new oil reserves and increase overall well productivity. Prior workover production averaged 3.0 BOPD for the previous six-months from the original ''Meyer'' completion interval. Post workover well production was increased to 5.3 BOPD on average for the following fifteen months. In December 2005, a bridge plug was installed above the ''Bell'' zone to test the ''Foix'' zone. Another cement squeeze was performed behind casing, selectively perforated in the shallower ''Foix'' zone and placed on production. The ''Foix'' test has produced water and a trace of oil for two months.

  15. DEVELOPMENT OF BYPASSED OIL RESERVES USING BEHIND CASING RESISTIVITY MEASUREMENTS

    SciTech Connect (OSTI)

    Michael G. Conner; Jeffrey A. Blesener

    2006-04-02

    Tubing and rods of the S.P. Pedro-Nepple No.1 well were pulled and the well was prepared for running of Schlumberger's Cased Hole Formation Resistivity Tool (CHFR) in selected intervals. The CHFR tool was successfully run and data was captured. The CHFR formation resistivity readings were compared to original open hole resistivity measurements. Separation between the original and CHFR resistivity curves indicate both swept and un-swept sand intervals. Both watered out sand intervals and those with higher remaining oil saturation have been identified. Due to the nature of these turbidite sands being stratigraphically continuous, both the swept and unswept layers have been correlated across to one of the four nearby offset shallow wells. As a result of the cased hole logging, one well was selected for a workover to recomplete and test suspected oil saturated shallow sand intervals. Well S.P. Pedro-Nepple No.2 was plugged back with cement excluding the previously existing production interval, squeeze cemented behind casing, selectively perforated in the shallower ''Bell'' zone and placed on production to develop potential new oil reserves and increase overall well productivity. Prior workover production averaged 3.0 BOPD for the previous six-months from the original ''Meyer'' completion interval. Post workover well production was increased to 5.3 BOPD on average for the following fifteen months. In December 2005, a bridge plug was installed above the ''Bell'' zone to test the ''Foix'' zone. Another cement squeeze was performed behind casing, selectively perforated in the shallower ''Foix'' zone and placed on production. The ''Foix'' test has produced water and a trace of oil for two months.

  16. New Pathways and Metrics for Enhanced, Reversible Hydrogen Storage in Boron-Doped Carbon Nanospaces

    SciTech Connect (OSTI)

    Pfeifer, Peter; Wexler, Carlos; Hawthorne, M. Frederick; Lee, Mark W.; Jalistegi, Satish S.

    2014-08-14

    This project, since its start in 2007entitled Networks of boron-doped carbon nanopores for low-pressure reversible hydrogen storage (2007-10) and New pathways and metrics for enhanced, reversible hydrogen storage in boron-doped carbon nanospaces (2010-13)is in support of the DOE's National Hydrogen Storage Project, as part of the DOE Hydrogen and Fuel Cells Programs comprehensive efforts to enable the widespread commercialization of hydrogen and fuel cell technologies in diverse sectors of the economy. Hydrogen storage is widely recognized as a critical enabling technology for the successful commercialization and market acceptance of hydrogen powered vehicles. Storing sufficient hydrogen on board a wide range of vehicle platforms, at energy densities comparable to gasoline, without compromising passenger or cargo space, remains an outstanding technical challenge. Of the main three thrust areas in 2007metal hydrides, chemical hydrogen storage, and sorption-based hydrogen storagesorption-based storage, i.e., storage of molecular hydrogen by adsorption on high-surface-area materials (carbons, metal-organic frameworks, and other porous organic networks), has emerged as the most promising path toward achieving the 2017 DOE storage targets of 0.055 kg H2/kg system (5.5 wt%) and 0.040 kg H2/liter system. The objective of the project is to develop high-surface-area carbon materials that are boron-doped by incorporation of boron into the carbon lattice at the outset, i.e., during the synthesis of the material. The rationale for boron-doping is the prediction that boron atoms in carbon will raise the binding energy of hydro- gen from 4-5 kJ/mol on the undoped surface to 10-14 kJ/mol on a doped surface, and accordingly the hydro- gen storage capacity of the material. The mechanism for the increase in binding energy is electron donation from H2 to electron-deficient B atoms, in the form of sp2 boron-carbon bonds. Our team is proud to have demonstrated the predicted increase in binding energy experimentally, currently at ~10 kJ/mol. The synthetic route for incorporation of boron at the outset is to create appropriately designed copoly- mers, with a boron-free and a boron-carrying monomer, followed by pyrolysis of the polymer, yielding a bo- ron-substituted carbon scaffold in which boron atoms are bonded to carbon atoms by synthesis. This is in contrast to a second route (funded by DE-FG36-08GO18142) in which first high-surface area carbon is cre- ated and doped by surface vapor deposition of boron, with incorporation of the boron into the lattice the final step of the fabrication. The challenge in the first route is to create high surface areas without compromising sp2 boron-carbon bonds. The challenge in the second route is to create sp2 boron-carbon bonds without com- promising high surface areas.

  17. A stellar census of the Tucana-Horologium moving group

    SciTech Connect (OSTI)

    Kraus, Adam L.; Shkolnik, Evgenya L.; Allers, Katelyn N.; Liu, Michael C.

    2014-06-01

    We report the selection and spectroscopic confirmation of 129 new late-type (SpT = K3-M6) members of the Tucana-Horologium moving group, a nearby (d ∼ 40 pc), young (τ ∼ 40 Myr) population of comoving stars. We also report observations for 13 of the 17 known Tuc-Hor members in this spectral type range, and that 62 additional candidates are likely to be unassociated field stars; the confirmation frequency for new candidates is therefore 129/191 = 67%. We have used radial velocities, Hα emission, and Li{sub 6708} absorption to distinguish between contaminants and bona fide members. Our expanded census of Tuc-Hor increases the known population by a factor of ∼3 in total and by a factor of ∼8 for members with SpT ≥ K3, but even so, the K-M dwarf population of Tuc-Hor is still markedly incomplete. Our expanded census allows for a much more detailed study of Tuc-Hor than was previously feasible. The spatial distribution of members appears to trace a two-dimensional sheet, with a broad distribution in X and Y, but a very narrow distribution (±5 pc) in Z. The corresponding velocity distribution is very small, with a scatter of ±1.1 km s{sup –1} about the mean UVW velocity for stars spanning the entire 50 pc extent of Tuc-Hor. We also show that the isochronal age (τ ∼ 20-30 Myr) and the lithium depletion boundary age (τ ∼ 40 Myr) disagree, following the trend in other pre-main-sequence populations for isochrones to yield systematically younger ages. The Hα emission line strength follows a trend of increasing equivalent width with later spectral type, as is seen for young clusters. We find that moving group members have been depleted of measurable lithium for spectral types of K7.0-M4.5. None of our targets have significant infrared excesses in the WISE W3 band, yielding an upper limit on warm debris disks of F < 0.7%. Finally, our purely kinematic and color-magnitude selection procedure allows us to test the efficiency and completeness for activity-based selection of young stars. We find that 60% of K-M dwarfs in Tuc-Hor do not have ROSAT counterparts and would have been omitted in X-ray-selected samples. In contrast, GALEX UV-selected samples using a previously suggested criterion for youth achieve completeness of 77% and purity of 78%, and we suggest new SpT-dependent selection criteria that will yield >95% completeness for τ ∼ 40 Myr populations with GALEX data available.

  18. Cesium cobaltdicarbollide-solubility, precipitation, and reactivity in basic aqueous solution

    SciTech Connect (OSTI)

    McCabe, D.J.; Fanning, J.C.; Hugg, L.A.; Smith, W.A.; Terrell, A.S.; Yasinsac, L.; Todd, L.J.; Jasper, S.A. Jr.

    1994-12-31

    The title compound, Cs{sup +}[Co((3)-1,2-C{sub 2}B{sub 9}H{sub 11}){sub 2}]{sup {minus}}(CsCDC), was precipitated with a NaCDC solution from solutions containing CsCl. The reaction was followed by measuring loss of light intensity as the precipitate formed. The [Cs{sup +}] and [CDC{sup {minus}}] at the point of precipitation were estimated and approximate values of the K{sub sp} for CsCDC determined at room temperature: 8 {times} 10{sup {minus}6} (water), 7 {times} 10{sup {minus}6} (1 M NaOH), and 2 {times} 10{sup {minus}6} (5M NaCl/0.1 M KOH/1.0 M NaOH). In some cases, NaCDC precipitated from solution when added to the latter salt solution. For the medium, 5 M NaNO{sub 3}/0.1 M KOH/1.0 M NaOH a four-fold excess of NaCDC was added to a 10mM Cs{sup +} solution at 40{degrees}C and the [CDC{sup {minus}}] measured spectrophotometrically. Only CsCDC precipitated, and a K{sub sp} of 3.9 {times} 10{sup {minus}6} was determined. The solubilities of CsCDC were measured in NaNO{sub 3} and NaCl solutions at 30{sub C} as a function of the Na salt concentration. Reaction of the CDC{sup {minus}} with OH{sup {minus}} slowly produces B(OH{sub 4}{sup {minus}}, H{sub 2}, and CoO(OH). Reaction of 22 {mu}M CsCDC with 1M NaOH has a first order rate constant at 56{degrees}C of 8.8 {times} 10{sup {minus}7} s{sup {minus}1}, while that for 14 mM NaCDC is 7.2 {times} 10{sup {minus}7} s {sup {minus}1}. Activation energy for the reaction is 110 kJ.

  19. Surface chemistry and bonding configuration of ultrananocrystalline diamond surfaces and their effects on nanotribological properties

    SciTech Connect (OSTI)

    Sumant, A. V.; Grierson, D. S.; Carpick, R. W.; Gerbi, J. E.; Carlisle, J. A.; Auciello, O.

    2007-12-15

    We present a comprehensive study of surface composition and nanotribology for ultrananocrystalline diamond (UNCD) surfaces, including the influence of film nucleation on these properties. We describe a methodology to characterize the underside of the films as revealed by sacrificial etching of the underlying substrate. This enables the study of the morphology and composition resulting from the nucleation and initial growth of the films, as well as the characterization of nanotribological properties which are relevant for applications including micro-/nanoelectromechanical systems. We study the surface chemistry, bonding configuration, and nanotribological properties of both the topside and the underside of the film with synchrotron-based x-ray absorption near-edge structure spectroscopy to identify the bonding state of the carbon atoms, x-ray photoelectron spectroscopy to determine the surface chemical composition, Auger electron spectroscopy to further verify the composition and bonding configuration, and quantitative atomic force microscopy to study the nanoscale topography and nanotribological properties. The films were grown on SiO{sub 2} after mechanically polishing the surface with detonation synthesized nanodiamond powder, followed by ultrasonication in a methanol solution containing additional nanodiamond powder. The sp{sup 2} fraction, morphology, and chemistry of the as-etched underside are distinct from the topside, exhibiting a higher sp{sup 2} fraction, some oxidized carbon, and a smoother morphology. The nanoscale single-asperity work of adhesion between a diamond nanotip and the as-etched UNCD underside is far lower than for a silicon-silicon interface (59.2{+-}2 vs 826{+-}186 mJ/m{sup 2}, respectively). Exposure to atomic hydrogen dramatically reduces nanoscale adhesion to 10.2{+-}0.4 mJ/m{sup 2}, at the level of van der Waals' interactions and consistent with recent ab initio calculations. Friction is substantially reduced as well, demonstrating a direct link between the surface chemistry and nanoscale friction. The proposed mechanism, supported by the detailed surface spectroscopic analysis, is the elimination of reactive (e.g., C*-), polar (e.g., C=O), and {pi}-bonded (C=C) surface groups, which are replaced by fully saturated, hydrogen-terminated surface bonds to produce an inert surface that interacts minimally with the contacting counterface.

  20. Surface chemistry and bonding configuration of ultrananocrystalline diamond surfaces and their effects on nanotribological properties.

    SciTech Connect (OSTI)

    Sumant, A. V.; Grierson, D. S.; Gerbi, J. E.; Carlisle, J. A.; Auciello, O.; Carpick, R. W.; Univ. of Wisconsin at Madison

    2007-12-01

    We present a comprehensive study of surface composition and nanotribology for ultrananocrystalline diamond (UNCD) surfaces, including the influence of film nucleation on these properties. We describe a methodology to characterize the underside of the films as revealed by sacrificial etching of the underlying substrate. This enables the study of the morphology and composition resulting from the nucleation and initial growth of the films, as well as the characterization of nanotribological properties which are relevant for applications including micro-/nanoelectromechanical systems. We study the surface chemistry, bonding configuration, and nanotribological properties of both the topside and the underside of the film with synchrotron-based x-ray absorption near-edge structure spectroscopy to identify the bonding state of the carbon atoms, x-ray photoelectron spectroscopy to determine the surface chemical composition, Auger electron spectroscopy to further verify the composition and bonding configuration, and quantitative atomic force microscopy to study the nanoscale topography and nanotribological properties. The films were grown on SiO{sub 2} after mechanically polishing the surface with detonation synthesized nanodiamond powder, followed by ultrasonication in a methanol solution containing additional nanodiamond powder. The sp{sup 2} fraction, morphology, and chemistry of the as-etched underside are distinct from the topside, exhibiting a higher sp{sup 2} fraction, some oxidized carbon, and a smoother morphology. The nanoscale single-asperity work of adhesion between a diamond nanotip and the as-etched UNCD underside is far lower than for a silicon-silicon interface (59.2 {+-} 2 vs 826 {+-} 186 mJ/m{sup 2}, respectively). Exposure to atomic hydrogen dramatically reduces nanoscale adhesion to 10.2 {+-} 0.4 mJ/m{sup 2}, at the level of van der Waals interactions and consistent with recent ab initio calculations. Friction is substantially reduced as well, demonstrating a direct link between the surface chemistry and nanoscale friction. The proposed mechanism, supported by the detailed surface spectroscopic analysis, is the elimination of reactive (e.g., C*-), polar (e.g., C-O), and {pi}-bonded (C-C) surface groups, which are replaced by fully saturated, hydrogen-terminated surface bonds to produce an inert surface that interacts minimally with the contacting counterface.

  1. Nanodiamond Foils for H- Stripping to Support the Spallation Neutron Source (SNS) and Related Applications

    SciTech Connect (OSTI)

    Vispute, R D; Ermer, Henry K; Sinsky, Phillip; Seiser, Andrew; Shaw, Robert W; Wilson, Leslie L; Harris, Gary; Piazza, Fabrice

    2013-01-01

    Thin diamond foils are needed in many particle accelerator experiments regarding nuclear and atomic physics, as well as in some interdisciplinary research. Particularly, nanodiamond texture is attractive for this purpose as it possesses a unique combination of diamond properties such as high thermal conductivity, mechanical strength and high radiation hardness; therefore, it is a potential material for energetic ion beam stripper foils. At the ORNL Spallation Neutron Source (SNS), the installed set of foils must be able to survive a nominal five-month operation period, without the need for unscheduled costly shutdowns and repairs. Thus, a single nanodiamond foil about the size of a postage stamp is critical to the entire operation of SNS and similar sources in U.S. laboratories and around the world. We are investigating nanocrystalline, polycrystalline and their admixture films fabricated using a hot filament chemical vapor deposition (HFCVD) system for H- stripping to support the SNS at Oak Ridge National Laboratory. Here we discuss optimization of process variables such as substrate temperature, process gas ratio of H2/Ar/CH4, substrate to filament distance, filament temperature, carburization conditions, and filament geometry to achieve high purity diamond foils on patterned silicon substrates with manageable intrinsic and thermal stresses so that they can be released as free standing foils without curling. An in situ laser reflectance interferometry tool (LRI) is used for monitoring the growth characteristics of the diamond thin film materials. The optimization process has yielded free standing foils with no pinholes. The sp3/sp2 bonds are controlled to optimize electrical resistivity to reduce the possibility of surface charging of the foils. The integrated LRI and HFCVD process provides real time information on the growth of films and can quickly illustrate growth features and control over film thickness. The results are discussed in the light of development of nanodiamond foils that will be able to withstand a few MW proton beam and hopefully will be able to be used after possible future upgrades to the SNS to greater than a 3MW beam.

  2. Development of nanodiamond foils for H- stripping to Support the Spallation Neutron Source (SNS) using hot filament chemical vapor deposition

    SciTech Connect (OSTI)

    Vispute, R D; Ermer, Henry K; Sinsky, Phillip; Seiser, Andrew; Shaw, Robert W; Wilson, Leslie L

    2014-01-01

    Thin diamond foils are needed in many particle accelerator experiments regarding nuclear and atomic physics, as well as in some interdisciplinary research. Particularly, nanodiamond texture is attractive for this purpose as it possesses a unique combination of diamond properties such as high thermal conductivity, mechanical strength and high radiation hardness; therefore, it is a potential material for energetic ion beam stripper foils. At the ORNL Spallation Neutron Source (SNS), the installed set of foils must be able to survive a nominal five-month operation period, without the need for unscheduled costly shutdowns and repairs. Thus, a small foil about the size of a postage stamp is critical to the operation of SNS and similar sources in U.S. laboratories and around the world. We are investigating nanocrystalline, polycrystalline and their admixture films fabricated using a hot filament chemical vapor deposition (HFCVD) system for H- stripping to support the SNS at Oak Ridge National Laboratory. Here we discuss optimization of process variables such as substrate temperature, process gas ratio of H2/Ar/CH4, substrate to filament distance, filament temperature, carburization conditions, and filament geometry to achieve high purity diamond foils on patterned silicon substrates with manageable intrinsic and thermal stresses so that they can be released as free standing foils without curling. An in situ laser reflectance interferometry tool (LRI) is used for monitoring the growth characteristics of the diamond thin film materials. The optimization process has yielded free standing foils with no pinholes. The sp3/sp2 bonds are controlled to optimize electrical resistivity to reduce the possibility of surface charging of the foils. The integrated LRI and HFCVD process provides real time information on the growth of films and can quickly illustrate growth features and control film thickness. The results are discussed in the light of development of nanodiamond foils that will be able to withstand a few MW proton beam and hopefully will be able to be used after possible future upgrades to the SNS to greater than a 3MW beam.

  3. SISGR - Hydrogen Caged in Carbon-Exploration of Novel Carbon-Hydrogen Interactions

    SciTech Connect (OSTI)

    Lueking, Angela; Badding, John; Crespi, Vinent

    2015-12-01

    Hydrogen trapped in a carbon cage, captured through repulsive interactions, is a novel concept in hydrogen storage. Trapping hydrogen via repulsive interactions borrows an idea from macroscale hydrogen storage (i.e. compressed gas storage tanks) and reapplies these concepts on the nanoscale in specially designed molecular containers. Under extreme conditions of pressure, hydrogen solubility in carbon materials is expected to increase and carbon is expected to restructure to minimize volume via a mixed sp2/sp3 hydrogenated state. Thermodynamics dictate that pre-formed C-H structures will rearrange with increased pressure, yet the final carbon-hydrogen interactions may be dependent upon the mechanism by which hydrogen is introduced. Gas trapping is meant to denote gas present in a solid in a high density, adsorbed-like state, when the external pressure is much less than that necessary to provide a comparable fluid density. Trapping thus denotes a kinetically metastable state rather than thermodynamic equilibrium. This project probed mechanochemical means to polymerize select hydrocarbons in the presence of gases, in an attempt to form localized carbon cages that trap gases via repulsive interactions. Aromatic, polyaromatic, and hydroaromatic molecules expected to undergo cyclo-addition reactions were polymerized at high (~GPa) pressures to form extended hydrogenated amorphous carbon networks. Notably, aromatics with a pre-existing internal free volume (such as Triptycene) appeared to retain an internal porosity upon application of pressure. However, a high photoluminescence background after polymerization precluded in situ identification of trapped gases. No spectroscopic evidence was found after depressurization that would be indicative of pockets of trapped gases in a localized high-pressure environment. Control studies suggested this measurement may be insensitive to gases at low pressure. Similarly, no spectral fingerprint was found for gas-imbued spherical carbon nanoshells, even after chemical capping of the gas-imbued nanoshells to limit gas diffusivity. Subsequently, spectral probes of gas vibrational modes adsorbed in various carbon nanostructures (including activated carbons, single-wall carbon nanotubes, polymers of intrinsic microporosity (PIMs), and UV-irradiated PIMs with decreased pore size) were found only at high pressure. The vibrational mode of the adsorbed film became perturbed in high density films, and the perturbation was sensitive to surface functional groups, pore size, and pore dimension. Experimental results were corroborated with first-principle modeling using density functional theory. Development of semi-empirical correlations that relate the spectral features to pore dimension, geometry, and chemical potential of the adsorbed film are on-going.

  4. Strain selection, biomass to biofuel conversion, and resource colocation have strong impacts on the economic performance of algae cultivation sites

    SciTech Connect (OSTI)

    Venteris, Erik R.; Wigmosta, Mark S.; Coleman, Andre M.; Skaggs, Richard

    2014-09-16

    Decisions involving strain selection, biomass to biofuel technology, and the location of cultivation facilities can strongly influence the economic viability of an algae-based biofuel enterprise. In this contribution we summarize our past results in a new analysis to explore the relative economic impact of these design choices. We present strain-specific growth model results from two saline strains (Nannocloropsis salina, Arthrospira sp.), a fresh to brackish strain (Chlorella sp., DOE strain 1412), and a freshwater strain of the order Sphaeropleales. Biomass to biofuel conversion is compared between lipid extraction (LE) and hydrothermal liquefaction (HTL) technologies. National-scale models of water, CO2 (as flue gas), land acquisition, site leveling, construction of connecting roads, and transport of HTL oil to existing refineries are used in conjunction with estimates of fuel value (from HTL) to prioritize and select from 88,692 unit farms (UF, 405 ha in pond area), a number sufficient to produce 136E+9 L yr-1 of renewable diesel (36 billion gallons yr-1, BGY). Strain selection and choice of conversion technology have large economic impacts, with differences between combinations of strains and biomass to biofuel technologies being up to $10 million dollars yr-1 UF-1. Results based on the most productive species, HTL-based fuel conversion, and resource costs show that the economic potential between geographic locations within the selection can differ by up to $4 million yr-1 UF-1, with 2.0 BGY of production possible from the most cost-effective sites. The local spatial variability in site rank is extreme, with very high and low rank sites within 10s of km of each other. Colocation with flue gas sources has a strong influence on site rank, but the most costly resource component varies from site to site. The highest rank sites are located predominantly in Florida and Texas, but most states south of 37°N latitude contain promising locations. Keywords: algae, biofuels, resource assessment, geographic information systems, techno-economics

  5. Search for liquids electrospraying the smallest possible nanodrops in vacuo

    SciTech Connect (OSTI)

    Alonso-Matilla, R.; Fernndez-Garca, J.; Congdon, H.; Fernndez de la Mora, J.

    2014-12-14

    Prior work with electrosprays in vacuum of mixtures of ionic liquids (ILs) and the moderately high boiling point (T{sub b}) solvents formamide (FM) and propylene carbonate (PC) (T{sub b} of 210 and 241?C) has shown that the charged drops produced have reasonably narrow charge/mass distributions, controllable over a wide mass/charge range. This enables their use as propellants in electrical propulsion with specific impulse I{sub sp} varying from a few hundred to a few thousand seconds (10?kV beam energy) and with excellent propulsion efficiency. However, some limitations are imposed by the finite room temperature volatility of FM and PC. Here, we seek improved performance from propellants based on the polar but viscous solvent Sulfolane (SF; ??=?43.2, ??=?10.3 cP) and the low viscosity but less polar solvent tributyl phosphate (TBP; ??=?8.9, ??=?3.4 cP), both with T{sub b}?>?280?C. Neither TBP nor its low viscosity mixtures with SF achieve the electrical conductivities needed to yield high I{sub sp}. Most ILs used in SF/IL mixtures tested were based on the 1-ethyl-3-methylimidazolium (EMI) or 1,3-dimethylimidazolium (DMI) cations, including EMI-BF{sub 4}, EMI-N(CN){sub 2}, and DMI-N(CN){sub 2}. These combinations reach high conductivities, some approaching 3?S/m, but have limited propulsive performance because evaporation of ions directly from the electrified meniscus produces undesirable mixed beams of drops and ions. Exceptional characteristics are found in mixtures of SF with ethylammonium nitrate (EAN), where the small EA{sup +} cation is strongly bound to the solvent, greatly delaying ion evaporation from the meniscus. Evidence on the formation of nano-jets with diameters as small as 1?nm is seen. Although unprecedented, this finding agrees with what would be expected if ion evaporation were suppressed. SF/EAN mixtures thus provide the best available sources to produce the smallest possible nanodrops, minimally polluted by ions.

  6. Ecological Interactions Between Metals and Microbes

    SciTech Connect (OSTI)

    Konopka, Allan E.

    2005-06-01

    Analysis of Lead Resistant Arthrobacter sp. SI-1 Arthrobacter sp. SI-1 was isolated from contaminated soils at the Seymour site, and was found to be resistant to Pb at concentrations near its solubility limit (150 micromolar). The genetic region that confers lead resistance is located on a plasmid (PSI-1)has been cloned. We have continued to analyze the sub-clones from the pSI-1 region. Initially we had predicted that ORF1-ORF5 were involved in lead resistance because their organization suggest a potential operon. In addition these same five genes have been found in a similar organization on a plasmid from Arthrobacter FB24, while the pAA1 plasmid from A. aurescens TC1 contains three of the five genes. In order to determine the minimum genes required for lead resistance a series of deletion mutants were constructed from the 14.7 kb clone pKJ60. Deletion of ORFs 3-5 did not have any measurable effect on the ability of the cloned fragment to rescue the lead resistance phenotype in a lead sensitive strain of E. coli (RW3110). The construct pKJ65 was generated by removing approximately 200 bp from the center region of ORF2, which codes for the P-Type ATPase; as expected this deletion resulted in a lead sensitive phenotype. While the genes downstream of ORF 2 do not appear to play a significant role in lead resistance the same cannot be said for ORF1 which is upstream. Based on amino acid sequence homology a BLAST search indicates ORF1 is likely a regulatory protein from the ArsR family. When ORF1 is removed (pKJ64, pKJ67), a lead sensitive phenotype occurs. Approximately 100 bp from the sequence of ORF1 was deleted (pKJ70) in order to test if ORF1 is required for lead resistance, or if the cells require something in the upstream non-coding region (binding site, promoter). Cells with pKJ70 show some limited growth in the presence lead, but it is generally much slower than the lead resistant constructs where ORF1 is present. These results suggest that ORF1 has a positive effect on lead resistance, perhaps acting as an activator of transcription. We are currently working to repeat this same set of experiments using cadmium. Previous work on the physiology of lead resistance was done in a MES buffered minimal media at pH6.5, the concentration of PbNO3 in these experiments ranged from 0 to 200 micromolar.

  7. The effects of Fe-oxidizing microorganisms on post-biostimulation permeability reduction and oxidative processes at the Rifle IFRC site

    SciTech Connect (OSTI)

    Chan, Clara Sze-Yue

    2015-07-02

    Fe oxidation and biomineral formation is important in aquifers because the highly-reactive oxides can control the mobility of nutrients (e.g. phosphate, C) and metals (e.g. arsenic, uranium). Mineral formation also has the potential to affect hydrology, depending on the volume and distribution in pore spaces. In this exploratory study, we sought to understand how microbial Fe-oxidizers and their biominerals affect, and are affected by groundwater flow. As part of work at the Rifle aquifer in Colorado, we initially hypothesized that Fe-oxidizers were contributing to aquifer clogging problems associated with enhanced bioremediation. To demonstrate the presence of Fe-oxidizers in the Rifle aquifer, we enriched FeOM from groundwater samples, and isolated two novel chemolithotrophic, microaerophilic Fe-oxidizing Betaproteobacteria, Hydrogenophaga sp. P101 and Curvibacter sp. CD03. To image cells and biominerals in the context of pores, we developed a micro-aquifer, a sand-filled flow-through culture chamber that allows for imaging of sediment pore space with multiphoton confocal microscopy. Fe oxide biofilms formed on sand grains, demonstrating that FeOM produce Fe oxide sand coatings. Fe coatings are common on aquifer sands, and tend to sequester contaminants; however, it has never previously been shown that microbes are responsible for their formation. In contrast to our original hypothesis, the biominerals did not clog the mini-aquifer. Instead, Fe biofilm distribution was dynamic: they grew as coatings, then periodically sloughed off sand grains, with some flocs later caught in pore throats. This has implications for physical hydrology, including pore scale architecture, and element transport. The sloughing of coatings likely prevents the biominerals from clogging wells and aquifers, at least initially. Although attached biomineral coatings sequester Fe-associated elements (e.g. P, As, C, U), when biominerals detach, these elements are transported as particles through the aquifer. Our work shows that microbial mineralization impacts in aquifers are dynamic, and that the fate and transport of biomineral-associated elements depend not only on geochemical conditions, but also physical pore-scale processes.

  8. Century-long Record of Black Carbon in an Ice Core from the Eastern Pamirs: Estimated Contributions from Biomass Burning

    SciTech Connect (OSTI)

    Wang, Mo; Xu, B.; Kaspari, Susan D.; Gleixner, Gerd; Schwab, Valerie; Zhao, Huabiao; Wang, Hailong; Yao, Ping

    2015-08-01

    We analyzed refractory black carbon (rBC) in an ice core spanning 1875-2000 AD from Mt. Muztagh Ata, the Eastern Pamirs, using a Single Particle Soot Photometer (SP2). Additionally a pre-existing levoglucosan record from the same ice core was used to differentiate rBC that originated from open fires, energy-related combustion of biomass, and fossil fuel combustion. Mean rBC concentrations increased four-fold since the mid-1970s and reached maximum values at the end of 1980s. The observed decrease of the rBC concentrations during the 1990s was likely driven by the economic recession of former USSR countries in Central Asia. Levoglucosan concentrations showed a similar temporal trend to rBC concentrations, exhibiting a large increase around 1980 AD followed by a decrease in the 1990s that was likely due to a decrease in energy-related biomass combustion. The time evolution of levoglucosan/rBC ratios indicated stronger emissions from open fires during the 1940s-1950s, while the increase in rBC during the 1980s-1990s was caused from an increase in energy-related combustion of biomass and fossil fuels.

  9. Uranium Biomineralization by Natural Microbial Phosphatase Activities in the Subsurface

    SciTech Connect (OSTI)

    Sobecky, Patricia A.

    2015-04-06

    In this project, inter-disciplinary research activities were conducted in collaboration among investigators at The University of Alabama (UA), Georgia Institute of Technology (GT), Lawrence Berkeley National Laboratory (LBNL), Brookhaven National Laboratory (BNL), the DOE Joint Genome Institute (JGI), and the Stanford Synchrotron Radiation Light source (SSRL) to: (i) confirm that phosphatase activities of subsurface bacteria in Area 2 and 3 from the Oak Ridge Field Research Center result in solid U-phosphate precipitation in aerobic and anaerobic conditions; (ii) investigate the eventual competition between uranium biomineralization via U-phosphate precipitation and uranium bioreduction; (iii) determine subsurface microbial community structure changes of Area 2 soils following organophosphate amendments; (iv) obtain the complete genome sequences of the Rahnella sp. Y9-602 and the type-strain Rahnella aquatilis ATCC 33071 isolated from these soils; (v) determine if polyphosphate accumulation and phytate hydrolysis can be used to promote U(VI) biomineralization in subsurface sediments; (vi) characterize the effect of uranium on phytate hydrolysis by a new microorganism isolated from uranium-contaminated sediments; (vii) utilize positron-emission tomography to label and track metabolically-active bacteria in soil columns, and (viii) study the stability of the uranium phosphate mineral product. Microarray analyses and mineral precipitation characterizations were conducted in collaboration with DOE SBR-funded investigators at LBNL. Thus, microbial phosphorus metabolism has been shown to have a contributing role to uranium immobilization in the subsurface.

  10. Use of Brazilian sugarcane bagasse ash in concrete as sand replacement

    SciTech Connect (OSTI)

    Sales, Almir; Lima, Sofia Araujo

    2010-06-15

    Sugarcane today plays a major role in the worldwide economy, and Brazil is the leading producer of sugar and alcohol, which are important international commodities. The production process generates bagasse as a waste, which is used as fuel to stoke boilers that produce steam for electricity cogeneration. The final product of this burning is residual sugarcane bagasse ash (SBA), which is normally used as fertilizer in sugarcane plantations. Ash stands out among agroindustrial wastes because it results from energy generating processes. Many types of ash do not have hydraulic or pozzolanic reactivity, but can be used in civil construction as inert materials. The present study used ash collected from four sugar mills in the region of Sao Carlos, SP, Brazil, which is one of the world's largest producers of sugarcane. The ash samples were subjected to chemical characterization, sieve analysis, determination of specific gravity, X-ray diffraction, scanning electron microscopy, and solubilization and leaching tests. Mortars and concretes with SBA as sand replacement were produced and tests were carried out: compressive strength, tensile strength and elastic modulus. The results indicated that the SBA samples presented physical properties similar to those of natural sand. Several heavy metals were found in the SBA samples, indicating the need to restrict its use as a fertilizer. The mortars produced with SBA in place of sand showed better mechanical results than the reference samples. SBA can be used as a partial substitute of sand in concretes made with cement slag-modified Portland cement.

  11. Study of Electron Transport and Amplification in Diamond

    SciTech Connect (OSTI)

    Ben-Zvi, Ilan; Muller, Erik

    2015-01-05

    The development of the Diamond Amplified Photocathode (DAP) has produced significant results under our previous HEP funded efforts both on the fabrication of working devices and the understanding of the underlying physics governing its performance. The results presented here substantiate the use of diamond as both a secondary electron amplifier for high-brightness, high-average-current electron sources and as a photon and particle detector in harsh radiation environments. Very high average current densities (>10A/cm2) have been transported through diamond material. The transport has been measured as a function of incident photon energy and found to be in good agreement with theoretical models. Measurements of the charge transport for photon energies near the carbon K-edge (290 eV for sp3 bonded carbon) have provided insight into carrier loss due to diffusion; modeling of this aspect of charge transport is underway. The response of diamond to nanosecond x-ray pulses has been measured; in this regime the charge transport is as expected. Electron emission from hydrogenated diamond has been measured using both electron and x-ray generated carriers; a gain of 178 has been observed for electron-generated carriers. The energy spectrum of the emitted electrons has been measured, providing insight into the electron affinity and ultimately the thermal emittance. The origin of charge trapping in diamond has been investigated for both bulk and surface trapping

  12. Synthesis of reduced graphene oxide (rGO) via chemical reduction

    SciTech Connect (OSTI)

    Thakur, Alpana Rangra, V. S.; Kumar, Sunil

    2015-05-15

    Natural flake Graphite was used as the starting material for the graphene synthesis. In the first step flake graphite was treated with oxidizing agents under vigorous conditions to obtain graphite oxide. Layered graphite oxide decorated with oxygen has large inter-layer distance leading easy exfoliation into single sheets by ultrasonication giving graphene oxide. In the last step exfoliated graphene oxide sheets were reduced slowly with the help of reducing agent to obtain fine powder which is labeled as reduced graphene oxide (rGO). This rGO was further characterized by X-Ray Diffraction (XRD), Scanning Tunneling Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy techniques. XRD pattern shows peaks corresponding to (002) graphitic lattice planes indicating the formation of network of sp{sup 2} like carbon structure. SEM images show the ultrathin, wrinkled, paper-like morphology of graphene sheets. IR study shows that the graphite has been oxidized to graphite oxide with the presence of various absorption bands confirming the presence of oxidizing groups. The FTIR spectrum of rGO shows no sharp peaks confirming the efficient reduction of rGO. The Raman spectrum shows disorder in the graphene sheets.

  13. 2010 Defects in Semiconductors GRC

    SciTech Connect (OSTI)

    Shengbai Zhang

    2011-01-06

    Continuing its tradition of excellence, this Gordon Conference will focus on research at the forefront of the field of defects in semiconductors. The conference will have a strong emphasis on the control of defects during growth and processing, as well as an emphasis on the development of novel defect detection methods and first-principles defect theories. Electronic, magnetic, and optical properties of bulk, thin film, and nanoscale semiconductors will be discussed in detail. In contrast to many conferences, which tend to focus on specific semiconductors, this conference will deal with point and extended defects in a broad range of electronic materials. This approach has proved to be extremely fruitful for advancing fundamental understanding in emerging materials such as wide-band-gap semiconductors, oxides, sp{sup 2} carbon based-materials, and photovoltaic/solar cell materials, and in understanding important defect phenomena such as doping bottleneck in nanostructures and the diffusion of defects and impurities. The program consists of about twenty invited talks and a number of contributed poster sessions. The emphasis should be on work which has yet to be published. The large amount of discussion time provides an ideal forum for dealing with topics that are new and/or controversial.

  14. Theory of the electronic structure of dilute bismide and bismide-nitride alloys of GaAs: Tight-binding and k.p models

    SciTech Connect (OSTI)

    Usman, Muhammad; Broderick, Christopher A.; O'Reilly, Eoin P.

    2013-12-04

    The addition of dilute concentrations of bismuth (Bi) into GaAs to form GaBi{sub x}As{sub 1?x} alloys results in a large reduction of the band gap energy (E{sub g}) accompanied by a significant increase of the spin-orbit-splitting energy (?{sub SO}), leading to an E{sub g} < ?{sub SO} regime for x ? 10% which is technologically relevant for the design of highly efficient photonic devices. The quaternary alloy GaBi{sub x}N{sub y}As{sub 1?x?y} offers further flexibility for band gap tuning, because both nitrogen and bismuth can independently induce band gap reduction. This work reports sp{sup 3}s* tight binding and 14-band k?p models for the study of the electronic structure of GaBi{sub x}As{sub 1?x} and GaBi{sub x}N{sub y}As{sub 1?x?y} alloys. Our results are in good agreement with the available experimental data.

  15. Preparation of the Crystal Complex of Phosphopantetheine Adenylyltransferase from Mycobacterium tuberculosis with Coenzyme A and Investigation of Its Three-Dimensional Structure at 2.1-A Resolution

    SciTech Connect (OSTI)

    Timofeev, V. I.; Smirnova, E. A.; Chupova, L. A.; Esipov, R. S.; Kuranova, I. P.

    2010-11-15

    Recombinant phosphopantetheine adenylyltransferase from Mycobacterium tuberculosis (PPAT Mt), which was produced by a high-producing strain and purified to 99%, was used for the crystal growth of the complex of the enzyme with coenzyme A (CoA). Crystals suitable for X-ray diffraction study were obtained by cocrystallization. The crystals belong to sp. gr. R32 and have the unit-cell parameters a = b = 98.840 A, c = 112.880 A, {alpha} = {beta} = 90.00{sup o}, and {gamma} = 120.00{sup o}. The three-dimensional structure of the complex was determined based on X-ray diffraction data collected from the crystals to 2.1 A resolution and refined to Rf = 22.7% and Rfree = 25.93%. Active-site bound coenzyme A was found, and its nearest environment was described. The conformational changes of the enzyme due to ligand binding were revealed. The binding of CoA by tuberculosis phosphopantetheine adenylyltransferase was characterized by comparing the structures of the title complex to a similar complex of PPAT from E. coli (PPAT Ec).

  16. Spin-phonon coupling in scandium doped gallium ferrite

    SciTech Connect (OSTI)

    Chakraborty, Keka R. E-mail: smyusuf@barc.gov.in; Mukadam, M. D.; Basu, S.; Yusuf, S. M. E-mail: smyusuf@barc.gov.in; Paul, Barnita; Roy, Anushree; Grover, Vinita; Tyagi, A. K.

    2015-03-28

    We embarked on a study of Scandium (Sc) doped (onto Ga site) gallium ferrite (GaFeO{sub 3}) and found remarkable magnetic properties. In both doped as well as parent compounds, there were three types of Fe{sup 3+} ions (depending on the symmetry) with the structure conforming to space group Pna2{sub 1} (Sp. Grp. No. 33) below room temperature down to 5?K. We also found that all Fe{sup 3+} ions occupy octahedral sites, and carry high spin moment. For the higher Sc substituted sample (Ga{sub 1?x}Sc{sub x}FeO{sub 3}: x?=?0.3), a canted magnetic ordered state is found. Spin-phonon coupling below Nel temperature was observed in doped compounds. Our results indicated that Sc doping in octahedral site modifies spin-phonon interactions of the parent compound. The spin-phonon coupling strength was estimated for the first time in these Sc substituted compounds.

  17. Fermentation of dilute acid pretreated Populus by Clostridium thermocellum, Caldicellulosiruptor bescii, and Caldicellulosiruptor obsidiansis

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Yee, Kelsey L.; Rodriguez, Jr., Miguel; Hamilton, Choo Yieng; Hamilton-Brehm, Scott D.; Thompson, Olivia A.; Elkins, James G.; Davison, Brian H.; Mielenz, Jonathan R.

    2015-07-25

    Consolidated bioprocessing (CBP), which merges enzyme production, biomass hydrolysis, and fermentation into a single step, has the potential to become an efficient and economic strategy for the bioconversion of lignocellulosic feedstocks to transportation fuels or chemicals. In this study, we evaluated Clostridium thermocellum, Caldicellulosiruptor bescii, and Caldicellulosiruptor obsidiansis, three , thermophilic,cellulolytic, mixed-acid fermenting candidate CBP microorganisms, for their fermentation capabilities using dilute acid pretreated Populus as a model biomass feedstock. Under pH controlled, anaerobic fermentation conditions, each candidate successfully digested a minimum of 75% of the cellulose from dilute acid pretreated Populus, as indicated by an increase in planktonic cellsmore » and end-product metabolites and a concurrent decrease in glucan content. C. thermocellum, which employs a cellulosomal approach to biomass degradation, required 120 hours to achieve 75% cellulose utilization. In contrast, the non-cellulosomal, secreted hydrolytic enzyme system of the Caldicellulosiruptor sp. required 300 hours to achieve similar results. End-point fermentation conversions for C. thermocellum, C. bescii, and C. obsidiansis were determined to be 0.29, 0.34, and 0.38 grams of total metabolites per gram of loaded glucan, respectively. This data provide a starting point for future strain engineering efforts that can serve to improve the biomass fermentation capabilities of these three promising candidate CBP platforms.« less

  18. Critical magnetic fields of superconducting aluminum-substituted Ba{sub 8}Si{sub 42}Al{sub 4} clathrate

    SciTech Connect (OSTI)

    Li, Yang Garcia, Jose; Lu, Kejie; Shafiq, Basir; Franco, Giovanni; Lu, Junqiang; Rong, Bo; Chen, Ning; Liu, Yang; Liu, Lihua; Song, Bensheng; Wei, Yuping; Johnson, Shardai S.; Luo, Zhiping; Feng, Zhaosheng

    2015-06-07

    In recent years, efforts have been made to explore the superconductivity of clathrates containing crystalline frameworks of group-IV elements. The superconducting silicon clathrate is unusual in that the structure is dominated by strong sp{sup 3} covalent bonds between silicon atoms, rather than the metallic bonding that is more typical of traditional superconductors. This paper reports on critical magnetic fields of superconducting Al-substituted silicon clathrates, which were investigated by transport, ac susceptibility, and dc magnetization measurements in magnetic fields up to 90 kOe. For the sample Ba{sub 8}Si{sub 42}Al{sub 4}, the critical magnetic fields were measured to be H{sub C1}?=?40.2?Oe and H{sub C2}?=?66.4 kOe. The London penetration depth of 4360? and the coherence length 70? were obtained, whereas the estimated GinzburgLandau parameter of ??=?62 revealed that Ba{sub 8}Si{sub 42}Al{sub 4} is a strong type-II superconductor.

  19. Intact and Degraded Criticality Calculations for the Codisposal of Shippingport LWBR Spent Nuclear Fuel in a Waste Package

    SciTech Connect (OSTI)

    L.M. Montierth

    2000-09-15

    The objective of this calculation is to characterize the nuclear criticality safety concerns associated with the codisposal of the U.S. Department of Energy's (DOE) Shippingport Light Water Breeder Reactor (SP LWBR) Spent Nuclear Fuel (SNF) in a 5-Defense High-Level Waste (5-DHLW) Waste Package (WP), which is to be placed in a Monitored Geologic Repository (MGR). The scope of this calculation is limited to the determination of the effective neutron multiplication factor (K{sub eff}) for intact- and degraded-mode internal configurations of the codisposal WP containing Shippingport LWBR seed-type assemblies. The results of this calculation will be used to evaluate criticality issues and support the analysis that is planed to be performed to demonstrate the viability of the codisposal concept for the MGR. This calculation is associated with the waste package design and was performed in accordance with the DOE SNF Analysis Plan for FY 2000 (See Ref. 22). The document has been prepared in accordance with the Administrative Procedure AP-3.12Q, Calculations (Ref. 23).

  20. A theoretical study of {pi}-conjugated materials

    SciTech Connect (OSTI)

    Kim, J.

    1993-12-31

    Conducting polymers and fullerenes are {pi}-conjugated materials. In these materials, sp{sup 2} hybridized orbits provide the framework structure, and 2p{sub z} electrons are delocalized and fill the {pi}-electron band partially. Even though the {pi}-band is partially filled, undoped conducting polymers and fullerenes are insulators or semiconductors at best. Actually they have a considerable gap in the {pi}-band because of either electron-photon coupling or the structure. At the same time, their bonds are dimerized in the ground state due to the electron-phonon coupling, which is well explained by the Su-Schrieffer-Heeger (SSH) model Hamiltonian. Besides the electron-phonon coupling, the electron-electron interaction cannot be neglected. Because of the huge dimension of Hilbert space, a complete treatment of electron-electron interaction is impossible. We developed a useful calculational scheme to combine these two effects for the electronic ground state and the lowest excited states. Since the {pi}-band is split and the HOMO-LUMO gap is wide (about 2 eV), the ground state and lowest optically excited states are dominated by the SSH ground state and singlet single excitation (SSE) configurations. In this dissertation, we use either SSH`s independent electron model or SSE calculation to study the electronic properties of conducting polymers and fullerenes. In addition, we study the manifestation of quantum chaos due to the electron-electron interaction from a triplet exciton on a linear molecule.