Sample records for n2 h2s hg

  1. First principles study of H2S adsorption and dissociation D.E. Jiang a

    E-Print Network [OSTI]

    Carter, Emily A.

    First principles study of H2S adsorption and dissociation on Fe(110) D.E. Jiang a , Emily A. Carter functional theory (DFT) results of H2S and HS adsorption and dissociation on the Fe(110) surface. We investigate the site preference of H2S, HS, and S on Fe(110). H2S is found to weakly adsorb on either

  2. Photochemistry in Terrestrial Exoplanet Atmospheres II: H2S and SO2 Photochemistry in Anoxic Atmospheres

    E-Print Network [OSTI]

    Hu, Renyu; Bains, William

    2013-01-01T23:59:59.000Z

    Sulfur gases are common components in the volcanic and biological emission on Earth, and are expected to be important input gases for atmospheres on terrestrial exoplanets. We study the atmospheric composition and the spectra of terrestrial exoplanets with sulfur compounds (i.e., H2S and SO2) emitted from their surfaces. We use a comprehensive one-dimensional photochemistry model and radiative transfer model to investigate the sulfur chemistry in atmospheres ranging from reducing to oxidizing. The most important finding is that both H2S and SO2 are chemically short-lived in virtually all types of atmospheres on terrestrial exoplanets, based on models of H2, N2, and CO2 atmospheres. This implies that direct detection of surface sulfur emission is unlikely, as their surface emission rates need to be extremely high (>1000 times Earth's volcanic sulfur emission) for these gases to build up to a detectable level. We also find that sulfur compounds emitted from the surface lead to photochemical formation of element...

  3. H2S Induces a Suspended AnimationLike State in Mice

    E-Print Network [OSTI]

    Storey, Kenneth B.

    H2S Induces a Suspended Animation­Like State in Mice Eric Blackstone,1,2 Mike Morrison,2 Mark B sulfide (H2S) is a specific, potent, and reversible inhibitor of complex IV (cytochrome c oxidase and CBT in mammals. When mice were exposed to 80 ppm of H2S, their oxygen (O2) consumption dropped by È50

  4. Selective and Rapid Room Temperature Detection of H2S Using Gold Nanoparticle Chain Arrays

    E-Print Network [OSTI]

    Chen, Wilfred

    Selective and Rapid Room Temperature Detection of H2S Using Gold Nanoparticle Chain Arrays Joun Lee conductometric hydrogen sulfide (H2S) sensor was fabricated by AC dielectrophoretic assembly of amino acid-ppm level, the upper detection limit of 2 ppm, and a response time ofH2S was achieved

  5. Chemical Engineering Journal 113 (2005) 119126 Understanding the limits of H2S degrading biotrickling filters

    E-Print Network [OSTI]

    2005-01-01T23:59:59.000Z

    Chemical Engineering Journal 113 (2005) 119­126 Understanding the limits of H2S degrading January 2005; received in revised form 29 April 2005; accepted 1 May 2005 Abstract The removal of H2S-controlled performance above 4000 m h-1 . The effect of the liquid trickling rate on H2S elimination was found to be nil

  6. H2S adsorption on chromium, chromia, and gold/chromia surfaces: Photoemission studies

    E-Print Network [OSTI]

    Diebold, Ulrike

    H2S adsorption on chromium, chromia, and gold/chromia surfaces: Photoemission studies J. A, New Orleans, Louisiana 70148 Received 10 June 1997; accepted 26 August 1997 The reaction of H2S-based high-resolution photoemission spectroscopy. At 300 K, H2S completely decomposes on polycrystalline

  7. Review of H2S Abatement in Geothermal Plants and Laboratory Scale Design of

    E-Print Network [OSTI]

    Karlsson, Brynjar

    Review of H2S Abatement in Geothermal Plants and Laboratory Scale Design of Tray Plate Distillation Engineering ­ ISE December 2013 #12;ii Review of H2S Abatement Methods in Geothermal Plants and Laboratory) such as CO2 and H2S within geothermal fluids have led to increased interest in developing methods

  8. Accurate Thermodynamic Model for the Calculation of H2S Solubility in Pure Water and Brines

    E-Print Network [OSTI]

    Zhu, Chen

    Accurate Thermodynamic Model for the Calculation of H2S Solubility in Pure Water and Brines Zhenhao mineral solubility in H2S saturated brines. An example calculation for galena solubility is given. 1 gasification process.5,6 Sequestration of the gases into geological brine formation is one of the promising

  9. Adsorption and thermal decomposition of H2S on Si(100) Ying-Huang Lai a

    E-Print Network [OSTI]

    Wu, Shin-Tson

    Adsorption and thermal decomposition of H2S on Si(100) Ying-Huang Lai a , Chuin-Tih Yeh a , Yi Adsorption and thermal decomposition of H2S on Si(1 0 0)-2 Â 1 are studied by means of temperature- sociates to form H and HS on the Si surface at adsorption temperature of 115 K. The Si(1 0 0)-2 Â 1 surface

  10. Qualitative determination of H2S crossover rates in nation membranes using ion-probe techniques

    SciTech Connect (OSTI)

    Brosha, Eric L [Los Alamos National Laboratory; Rockward, Tommy [Los Alamos National Laboratory; Uribe, Francisco A [Los Alamos National Laboratory; Garzon, Fernando H [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Polymer electrolyte membrane fuel cells are sensitive to impurities that may be present in either the oxidizer or fuel. H2S, even at the ppb level, will have a dramatic and adverse affect on fuel cell performance. The H2S permeability through dry and humidified Nafion PEMFC membranes was studied using ion probe techniques. A sulfide anti-oxidant buffer solution was used to trap and concentrate trace quantities of H2S that permeated through 50 cm2samples of Nafion 117 and 212 membranes using a partial pressure difference up to I030ppm at room temperature. Experiments were conducted for up to 24 hours in order to achieve sulfide ion concentrations high enough to be precisely determined by subsequent titration with Pb(N03)2. The rate of H2S crossover for dry 117 and 212 were identical at 1.2e-7 g/min. Humidification increased the crossover rate to 5.ge-7 glmin and 1.8e-6 glmin for 117 and 212 respectively. Although the data collected in this work show that the rate of H2S crossover increases with water content and reduced membrane thickness, an accurate determination of permeation constants from this work was not possible because the H2S partial pressure was not constant throughout the experiment.

  11. Rate-Based Modeling of Reactive Absorption of CO2 and H2S into Aqueous Methyldiethanolamine

    E-Print Network [OSTI]

    Rochelle, Gary T.

    Rate-Based Modeling of Reactive Absorption of CO2 and H2S into Aqueous Methyldiethanolamine Manuel in the liquid phase. This framework was applied to the selective absorption of H2S from fuel gas containing CO2 primarily by physical absorption. Gas-film resistance is never significant for CO2 absorption. For H2S

  12. Understanding dopant and defect effect on H2S sensing performances of graphene: A first-principles study

    E-Print Network [OSTI]

    Guo, John Zhanhu

    Understanding dopant and defect effect on H2S sensing performances of graphene: A first November 2012 Accepted 29 November 2012 Keywords: Graphene H2S Sensor Electron transport a b s t r a c t The interaction between hydrogen sulfite (H2S) and graphene was investigated by density functional the- ory

  13. Chemical Engineering Journal 87 (2002) 101110 Co-treatment of H2S and toluene in a biotrickling filter

    E-Print Network [OSTI]

    2002-01-01T23:59:59.000Z

    Chemical Engineering Journal 87 (2002) 101­110 Co-treatment of H2S and toluene in a biotrickling-gases contain H2S and a wide range of volatile organic compounds (VOCs). Since co-treatment of odors and VOCs in biotrickling filters is a relatively unexplored area, the simultaneous biotreatment of H2S and toluene (as

  14. Mineralization of Basalts in the CO2-H2O-H2S System. | EMSL

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

    HT, BP McGrail, AT Owen, and BW Arey.2013."Mineralization of Basalts in the CO2-H2O-H2S System."International Journal of Greenhouse Gas Control 16:187-196. doi:10.1016...

  15. Retrofitting existing chemical scrubbers to biotrickling filters for H2S emission control

    E-Print Network [OSTI]

    sulfide (H2S) in the converted scrubber was possible even at gas contact times as low as 1.6 s. That is 8 of objectionable odors from these facilities is a major problem. Odors emitted by publicly owned treatment works scrubbing in packed-bed towers is an estab- lished technique and is effective at gas contact times as short

  16. Upper limits for PH3 and H2S in Titan's Atmosphere from Cassini CIRS

    E-Print Network [OSTI]

    Nixon, Conor A; Irwin, Patrick G J; Horst, Sarah M; 10.1016/j.icarus.2013.02.024

    2013-01-01T23:59:59.000Z

    We have searched for the presence of simple P and S-bearing molecules in Titan's atmosphere, by looking for the characteristic signatures of phosphine and hydrogen sulfide in infrared spectra obtained by Cassini CIRS. As a result we have placed the first upper limits on the stratospheric abundances, which are 1 ppb (PH3) and 330 ppb (H2S), at the 2-sigma significance level.

  17. Adsorption, Diffusion, and Dissociation of H2S on Fe(100) from First Principles D. E. Jiang and Emily A. Carter*

    E-Print Network [OSTI]

    Carter, Emily A.

    Adsorption, Diffusion, and Dissociation of H2S on Fe(100) from First Principles D. E. Jiang-polarized periodic density functional theory (DFT) to characterize H2S and HS adsorption, diffusion, and dissociation on the Fe(100) surface. We investigate the site preference of H2S, HS, and S on Fe(100). H2S is predicted

  18. 15 Years of Successful H2S Abatement | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Projectsource HistorykV remotea Responsible00260H2S

  19. Effects of Alloying on the Chemistry of CO and H2S on Fe Surfaces D. E. Jiang

    E-Print Network [OSTI]

    Carter, Emily A.

    Effects of Alloying on the Chemistry of CO and H2S on Fe Surfaces D. E. Jiang Department. Carter* Department of Mechanical and Aerospace Engineering and Program in Applied and Computational with the metal surface. Here we consider whether alloying the steel surface might be able to inhibit

  20. Conversion of Full-Scale Wet Scrubbers to Biotrickling Filters for H2S Control at Publicly Owned Treatment Works

    E-Print Network [OSTI]

    Conversion of Full-Scale Wet Scrubbers to Biotrickling Filters for H2S Control at Publicly Owned. This paper discusses the conversion of chemical scrubbers to biological trickling filters. Initially in determining the general suitability of converting wet scrubbers to biotrickling filters were identified

  1. Influence of H2S and Thiols on the Binding of Alkenes and Alkynes to ReS4 Spectator Sulfido Effect

    E-Print Network [OSTI]

    Rauchfuss, Thomas B.

    Influence of H2S and Thiols on the Binding of Alkenes and Alkynes to ReS4 -: The Spectator Sulfido-component reaction of ReS4 - (1), H2S, and unsaturated substrates (un ) alkene, alkyne) affords the ReV derivatives Re(S)(S2un)(SH)2 -. These adducts arise via the addition of H2S to intermediate dithiolates ReS2(S2C2

  2. AOI [3] High-Temperature Nano-Derived Micro-H2 and - H2S Sensors

    SciTech Connect (OSTI)

    Perepezko, John; Lu-Steffes, Otto

    2014-08-31T23:59:59.000Z

    The emissions from coal-fired power plants remain a significant concern for air quality. This environmental challenge must be overcome by controlling the emission of sulfur dioxide (SO2) and hydrogen sulfide (H2S) throughout the entire coal combustion process. One of the processes which could specifically benefit from robust, low cost, and high temperature compatible gas sensors is the coal gasification process which converts coal and/or biomass into syngas. Hydrogen (H2), carbon monoxide (CO) and sulfur compounds make up 33%, 43% and 2% of syngas, respectively. Therefore, development of a high temperature (>500°C) chemical sensor for in-situ monitoring of H2, H2S and SO2 levels during coal gasification is strongly desired. The selective detection of SO2/H2S in the presence of H2, is a formidable task for a sensor designer. In order to ensure effective operation of these chemical sensors, the sensor system must inexpensively function within harsh temperature and chemical environment. Currently available sensing approaches, which are based on gas chromatography, electrochemistry, and IR-spectroscopy, do not satisfy the required cost and performance targets. This work focused on the development microsensors that can be applied to this application. In order to develop the high- temperature compatible microsensor, this work addressed various issues related to sensor stability, selectivity, and miniaturization. In the research project entitled “High-Temperature Nano-Derived Micro-H2 and -H2S Sensors”, the team worked to develop micro-scale, chemical sensors and sensor arrays composed of nano-derived, metal-oxide composite materials to detect gases like H2, SO2, and H2S within high-temperature environments (>500?C). The research was completed in collaboration with NexTech Materials, Ltd. (Lewis Center, Ohio). NexTech assisted in the testing of the sensors in syngas with contaminate levels of H2S. The idea of including nanomaterials as the sensing material within resistive-type chemical sensor platforms was to increase the sensitivity (as shown for room temperature applications). Unfortunately, nanomaterials are not stable at high temperatures due to sintering and coarsening processes that are driven by their high surface to volume ratio. Therefore, new hydrogen and sulfur selective nanomaterial systems with high selectivity and stability properties in the proposed harsh environment were investigated. Different nano-morphologies of zirconate, molybdate, and tungstate compounds were investigated. The fabrication of the microsensors consisted of the deposition of the selective nanomaterial systems over metal based interconnects on an inert substrate. This work utilized the chemi-resistive (resistive- type) microsensor architecture where the chemically and structurally stable, high temperature compatible electrodes were sputtered onto a ceramic substrate. The nanomaterial sensing systems were deposited over the electrodes using a lost mold method patterned by conventional optical lithography. The microsensor configuration with optimized nanomaterial system was tested and compared to a millimeter-size sensor e outcomes of this research will contribute to the economical application of sensor arrays for simultaneous sensing of H2, H2S, and SO2.

  3. Sulfur depletion in dense clouds and circumstellar regions I. H2S ice abundance and UV-photochemical reactions in the H2O-matrix

    E-Print Network [OSTI]

    Jiménez-Escobar, A

    2011-01-01T23:59:59.000Z

    This work aims to study the unexplained sulfur depletion observed toward dense clouds and protostars. We made simulation experiments of the UV-photoprocessing and sublimation of H2S and H2S:H2O ice in dense clouds and circumstellar regions, using the Interstellar Astrochemistry Chamber (ISAC), a state-of-the-art ultra-high-vacuum setup. The ice was monitored in situ by mid-infrared spectroscopy in transmittance. Temperature-programmed desorption (TPD) of the ice was performed using a quadrupole mass spectrometer (QMS) to detect the volatiles desorbing from the ice. Comparing our laboratory data to infrared observations of protostars we obtained a more accurate upper limit of the abundance of H2S ice toward these objects. We determined the desorption temperature of H2S ice, which depends on the initial H2S:H2O ratio. UV-photoprocessing of H2S:H2O ice led to the formation of several species. Among them, H2S2 was found to photodissociate forming S2 and, by elongation, other species up to S8, which are refractory...

  4. Sulfur-Bearing Molecules In Massive Star-Forming Regions: Observations Of OCS, CS, H2S and SO

    E-Print Network [OSTI]

    Li, Juan; Zhu, Qingfeng; Zhang, Jiangshui; Li, Di

    2015-01-01T23:59:59.000Z

    We studied sulfur chemistry of massive star-forming regions through single-dish submillimeter spectroscopy. OCS, O13CS, 13CS, H2S and SO transitions were observed toward a sample of massive star-forming regions with embedded UCH II or CH II regions. These sources could be divided into H II-hot core and H II-only sources based on their CH3CN emission. Our results show that the OCS line of thirteen sources is optically thick, with optical depth ranging from 5 to 16. Column densities of these molecules were computed under LTE conditions. CS column densities were also derived using its optically thin isotopologue 13CS. H2S is likely to be the most abundant gas-phase sulfuretted molecules in hot assive cores. Both the column density and abundance of sulfur-bearing molecules decrease significantly from H II-hot core to H II-only sources. Ages derived from hot core models appear to be consistent with star-formation theories, suggesting that abundance ratios of [CS]/[SO], [SO]/[OCS] and [OCS]/[CS] could be used as ch...

  5. Angular dependence of dissociative electron attachment topolyatomic molecules: application to the 2B1 metastable state of the H2Oand H2S anions

    SciTech Connect (OSTI)

    Haxton, Daniel J.; McCurdy, C. William; Rescigno, Thomas N.

    2006-01-12T23:59:59.000Z

    The angular dependence of dissociative electron attachment (DEA) to polyatomic targets is formulated in the local complex potential model, under the assumption that the axial recoil approximation describes the dissociation dynamics. An additional approximation, which is found to be valid in the case of H2O but not in the case of H2S, makes it possible to describe the angular dependence of DEA solely from an analysis of the fixed-nuclei entrance amplitude, without carrying out nuclear dynamics calculations. For H2S, the final-vibrational-state-specific angular dependence of DEA is obtained by incorporating the variation of the angular dependence of the entrance amplitude with nuclear geometry into the nuclear dynamics. Scattering calculations using the complex Kohn method and, for H2S, full quantum calculations of the nuclear dynamics using the Multi-Configuration Time-Dependent Hartree method, are performed.

  6. N=2 superconformal nets

    E-Print Network [OSTI]

    Sebastiano Carpi; Robin Hillier; Yasuyuki Kawahigashi; Roberto Longo; Feng Xu

    2014-11-21T23:59:59.000Z

    We provide an Operator Algebraic approach to N=2 chiral Conformal Field Theory and set up the Noncommutative Geometric framework. Compared to the N=1 case, the structure here is much richer. There are naturally associated nets of spectral triples and the JLO cocycles separate the Ramond sectors. We construct the N=2 superconformal nets of von Neumann algebras in general, classify them in the discrete series cnets with cnet representations.

  7. Alkaline Biofiltration of H2S Odors A R M A N D O G O N Z A L E Z -S A N C H E Z , ,

    E-Print Network [OSTI]

    Alkaline Biofiltration of H2S Odors A R M A N D O G O N Z ´A L E Z - S ´A N C H E Z , , S E R G I. Accepted July 8, 2008. Hydrogen sulfide (H2S) is a very common odor nuisance which is best controlled by chemical or biological scrubbing. Under alkaline pH, the amount of H2S that can be solubilized

  8. Herschel observations of Extra-Ordinary Sources: H2S as a Probe of Dense Gas and Possibly Hidden Luminosity Toward the Orion KL Hot Core

    E-Print Network [OSTI]

    Crockett, N R; Neill, J L; Black, J H; Blake, G A; Kleshcheva, M

    2014-01-01T23:59:59.000Z

    We present Herschel/HIFI observations of the light hydride H$_{2}$S obtained from the full spectral scan of the Orion Kleinmann-Low nebula (Orion KL) taken as part of the HEXOS GT key program. In total, we observe 52, 24, and 8 unblended or slightly blended features from H$_{2}$$^{32}$S, H$_{2}$$^{34}$S, and H$_{2}$$^{33}$S, respectively. We only analyze emission from the so called hot core, but emission from the plateau, extended ridge, and/or compact ridge are also detected. Rotation diagrams for ortho and para H$_{2}$S follow straight lines given the uncertainties and yield T$_{\\rm rot}$=141$\\pm$12 K. This indicates H$_{2}$S is in LTE and is well characterized by a single kinetic temperature or an intense far-IR radiation field is redistributing the population to produce the observed trend. We argue the latter scenario is more probable and find that the most highly excited states (E$_{\\rm up}$>1000 K) are likely populated primarily by radiation pumping. We derive an H$_{2}$$^{32}$S column density, N$_{\\rm ...

  9. MERIT Hg System Design Update

    E-Print Network [OSTI]

    McDonald, Kirk

    of the Latest System · Circular sump tank - Drain at back - Ports for Hg fill, Hg extraction, cylinder vent & Hg discharge are same pipe · Drain & Hg inlet are same pipe · Lugs on cylinders not representative · Current: fused silica backed by lexan · Alternative: Sapphire instead of silica #12;12 OAK RIDGE NATIONAL

  10. Interferometric imaging of the sulfur-bearing molecules H2S, SO and CS in comet C/1995 O1 (Hale-Bopp)

    E-Print Network [OSTI]

    Boissier, J; Biver, N; Crovisier, J; Despois, D; Marsden, B G; Moreno, R

    2007-01-01T23:59:59.000Z

    We present observations of rotational lines of H2S, SO and CS performed in comet C/1995 O1 (Hale-Bopp) in March 1997 with the Plateau de Bure interferometer (IRAM). The observations provide informations on the spatial and velocity distributions of these molecules. They can be used to constrain their photodissociation rate and their origin. We use a radiative transfer code which allows us to compute synthetic line profiles and interferometric maps, to be compared to the observations. Both single-dish spectra and interferometric spectral maps show a day/night asymmetry in the outgassing. From the analysis of the spectral maps, including the astrometry, we show that SO and CS present in addition a jet-like structure that may be the gaseous counterpart of the dust high-latitude jet observed in optical images. A CS rotating jet is also observed. Using the astrometry provided by continuum radio maps obtained in parallel, we conclude that there is no need to invoke of nongravitational forces acting on this comet, an...

  11. High Power Hg Target Conceptual Design Review

    E-Print Network [OSTI]

    McDonald, Kirk

    LABORATORY U. S. DEPARTMENT OF ENERGY Conceptual Design Review 7-8 Feb 05 System Overview Solenoid Proton Alternative Hg Delivery System Hydraulic Fluid Cylinder (3000 psi) Hg Cylinder (1000 psi) Hg Discharge Hg concept & issues · Proposed new baseline delivery system · Hg flow analysis in new baseline system

  12. N=2 Quantum String Scattering

    E-Print Network [OSTI]

    Gordon Chalmers; Olaf Lechtenfeld; Bernd Niemeyer

    2000-09-08T23:59:59.000Z

    We calculate the genus-one three- and four-point amplitudes in the 2+2 dimensional closed N=(2,2) worldsheet supersymmetric string within the RNS formulation. Vertex operators are redefined with the incorporation of spinor helicity techniques, and the quantum scattering is shown to be manifestly gauge and Lorentz invariant after normalizing the string states. The continuous spin structure summation over the monodromies of the worldsheet fermions is carried out explicitly, and the field-theory limit is extracted. The amplitude in this limit is shown to be the maximally helicity violating amplitude in pure gravity evaluated in a two-dimensional setting, which vanishes, unlike the four-dimensional result. The vanishing of the genus-one N=2 closed string amplitude is related to the absence of one-loop divergences in dimensionally regulated IIB supergravity. Comparisons and contrasts between self-dual field theory and the N=2 string theory are made at the quantum level; they have different S-matrices. Finally, we point to further relations with self-dual field theory and two-dimensional models.

  13. Supersymmetry and {sup 198}Hg

    SciTech Connect (OSTI)

    Bernards, Christian; Heinze, Stefan; Jolie, Jan; Fransen, Christoph; Linnemann, Andreas; Radeck, Desiree [Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicher Strasse 77, 50937 Koeln (Germany)

    2009-01-28T23:59:59.000Z

    The energy spectrum and electromagnetic transition properties of the supermultiplet members with two proton fermions can be constructed using the dynamical U{sub v}(6/12) x U{sub {pi}}(6/4) extended supersymmetry. In order to investigate predictions of the two proton fermion--four neutron boson supermultiplet member {sup 198}Hg, an experiment with the HORUS cube {gamma}-ray spectrometer at the Cologne TANDEM accelerator was performed using the {sup 196}Pt({alpha},2n){sup 198}Hg reaction. By analyzing {gamma}{gamma} coincidence spectra and {gamma}{gamma} angular correlations, the required experimental data--level and decay energies, level spins and multipole mixing ratios--could be obtained. For the low-energy states, the experimental data show good agreement with theory.

  14. N=2 supersymmetric Pais-Uhlenbeck oscillator

    E-Print Network [OSTI]

    Masterov, Ivan

    2015-01-01T23:59:59.000Z

    We construct an N=2 supersymmetric extension of the Pais-Uhlenbeck oscillator for distinct frequencies of oscillation. A link to a set of decoupled N=2 supersymmetric harmonic oscillators with alternating sign in the Hamiltonian is introduced. Symmetries of the model are discussed in detail. The investigation of a quantum counterpart of the constructed model shows that the corresponding Fock space contains negative norm states and the energy spectrum of the system is unbounded from below.

  15. N=2 supersymmetric Pais-Uhlenbeck oscillator

    E-Print Network [OSTI]

    Ivan Masterov

    2015-03-12T23:59:59.000Z

    We construct an N=2 supersymmetric extension of the Pais-Uhlenbeck oscillator for distinct frequencies of oscillation. A link to a set of decoupled N=2 supersymmetric harmonic oscillators with alternating sign in the Hamiltonian is introduced. Symmetries of the model are discussed in detail. The investigation of a quantum counterpart of the constructed model shows that the corresponding Fock space contains negative norm states and the energy spectrum of the system is unbounded from below.

  16. Hg System Decommissioning V.B. Graves

    E-Print Network [OSTI]

    McDonald, Kirk

    respiratory protection at all times · Local ventilation in use · Estimate total overflow ~200 ml - Most cleaner storage canister and in plastic intermediate container · Vacuum cleaner and local ventilation · Prepared Hg vacuum cleaner, started cleanup of larger Hg pools then entire local area · Wiped equipment

  17. CERN Hg Jet System V.B. Graves

    E-Print Network [OSTI]

    McDonald, Kirk

    Collaboration Mtg 16 Feb 05 Alternative Hg Delivery System Hydraulic Fluid Cylinder (3000 psi) Hg Cylinder (1000 energy performed on piston = press*area*dist/time 11 Hyd Pump pump inefficiency 8 11 340 340 6 8 Piston Sized for 20sec jet Drain Hg Supply Hg Return Position Sensor Hydraulic Lines Hg Cylinder Vent Line #12

  18. Critical phenomena in N=2* plasma

    E-Print Network [OSTI]

    A. Buchel; C. Pagnutti

    2010-10-16T23:59:59.000Z

    We use gauge theory/string theory correspondence to study finite temperature critical behaviour of mass deformed N=4 SU(N) supersymmetric Yang-Mills theory at strong coupling, also known as N=2* gauge theory. For certain range of the mass parameters, N=2* plasma undergoes a second-order phase transition. We compute all the static critical exponents of the model and demonstrate that the transition is of the mean-field theory type. We show that the dynamical critical exponent of the model is z=0, with multiple hydrodynamic relaxation rates at criticality. We point out that the dynamical critical phenomena in N=2* plasma is outside the dynamical universality classes established by Hohenberg and Halperin.

  19. The ${\\mathcal N}=2$ superconformal bootstrap

    E-Print Network [OSTI]

    Christopher Beem; Madalena Lemos; Pedro Liendo; Leonardo Rastelli; Balt C. van Rees

    2014-12-23T23:59:59.000Z

    In this work we initiate the conformal bootstrap program for ${\\mathcal N}=2$ superconformal field theories in four dimensions. We promote an abstract operator-algebraic viewpoint in order to unify the description of Lagrangian and non-Lagrangian theories, and formulate various conjectures concerning the landscape of theories. We analyze in detail the four-point functions of flavor symmetry current multiplets and of ${\\mathcal N}=2$ chiral operators. For both correlation functions we review the solution of the superconformal Ward identities and describe their superconformal block decompositions. This provides the foundation for an extensive numerical analysis discussed in the second half of the paper. We find a large number of constraints for operator dimensions, OPE coefficients, and central charges that must hold for any ${\\mathcal N}=2$ superconformal field theory.

  20. The ${\\mathcal N}=2$ superconformal bootstrap

    E-Print Network [OSTI]

    Beem, Christopher; Liendo, Pedro; Rastelli, Leonardo; van Rees, Balt C

    2014-01-01T23:59:59.000Z

    In this work we initiate the conformal bootstrap program for ${\\mathcal N}=2$ superconformal field theories in four dimensions. We promote an abstract operator-algebraic viewpoint in order to unify the description of Lagrangian and non-Lagrangian theories, and formulate various conjectures concerning the landscape of theories. We analyze in detail the four-point functions of flavor symmetry current multiplets and of ${\\mathcal N}=2$ chiral operators. For both correlation functions we review the solution of the superconformal Ward identities and describe their superconformal block decompositions. This provides the foundation for an extensive numerical analysis discussed in the second half of the paper. We find a large number of constraints for operator dimensions, OPE coefficients, and central charges that must hold for any ${\\mathcal N}=2$ superconformal field theory.

  1. Fusion rules for N=2 superconformal modules

    E-Print Network [OSTI]

    Minoru Wakimoto

    1998-07-22T23:59:59.000Z

    In this note we calculate the fusion coefficients for minimal series representations of the N=2 superconformal algebra by using a modified Verlinde's formula, and obtain associative and commutative fusion algebras with non-negative integral fusion coefficients at each level. Some references are added.

  2. Characterization of BCl3/N-2 plasmas

    E-Print Network [OSTI]

    Sia, S. F.

    2003-08-15T23:59:59.000Z

    measured with a DekTak surface a! Electronic mail: nordhed@ku.edu Characterization of BCl 3 N 2 plasmas Karen J. Nordheden a) and Joanne F. Sia Plasma Research Laboratory, Department of Chemical and Lawrence, Kansas 66045 ~Received 25 April 2003; accepted...

  3. TECHNICAL REPORTS Continuous measurement of soil N2

    E-Print Network [OSTI]

    Minnesota, University of

    TECHNICAL REPORTS 606 Continuous measurement of soil N2 O emissions is needed to constrain N2 O constraint on estimates of N loss to the atmosphere and N2 O emission factors. Approximately 95% of soil N2 O simple methodology, and require no electrical power. However, manual sampling usually provides a low

  4. HgTe-low-field Strained HgTe: a textbook 3D topological insulator

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    HgTe-low-field Strained HgTe: a textbook 3D topological insulator Cl´ement Bouvier, Tristan Meunier martyrs 38054 Grenoble Cedex 9, France (Dated: December 9, 2011) Topological insulators can be seen-conductors and topological- insulators, other contributions make transport data more difficult to unravel. This letter

  5. Bulk viscosity of N=2* plasma

    E-Print Network [OSTI]

    Alex Buchel; Chris Pagnutti

    2009-03-02T23:59:59.000Z

    We use gauge theory/string theory correspondence to study the bulk viscosity of strongly coupled, mass deformed SU(N_c) N=4 supersymmetric Yang-Mills plasma, also known as N=2^* gauge theory. For a wide range of masses we confirm the bulk viscosity bound proposed in arXiv:0708.3459. For a certain choice of masses, the theory undergoes a phase transition with divergent specific heat c_V ~ |1-T_c/T|^(-1/2). We show that, although bulk viscosity rapidly grows as T -> T_c, it remains finite in the vicinity of the critical point.

  6. N2Solar | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLu anMicrogreenMoon LakeMountainMunicipalRenewable EnergyN2Solar

  7. Lean NOx Trap Regeneration Selectivity Towards N2O -- Similarities...

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

    Regeneration Selectivity Towards N2O -- Similarities and Differences Between H2, CO and C3H6 Reductants Lean NOx Trap Regeneration Selectivity Towards N2O -- Similarities and...

  8. 2, 779827, 2005 Inventories of N2O

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    BGD 2, 779­827, 2005 Inventories of N2O and NO emissions from European forest soils M. Kesik et al Biogeosciences Discussions is the access reviewed discussion forum of Biogeosciences Inventories of N2O Inventories of N2O and NO emissions from European forest soils M. Kesik et al. Title Page Abstract

  9. Dipole Bands in {sup 196}Hg

    SciTech Connect (OSTI)

    Lawrie, J. J.; Lawrie, E. A.; Newman, R. T.; Sharpey-Schafer, J. F.; Smit, F. D. [iThemba LABS, PO Box 722, Somerset West 7129 (South Africa); Msezane, B. [iThemba LABS, PO Box 722, Somerset West 7129 (South Africa); Physics Department, University of Zululand, Private Bag X1001, Kwadlangezwa 3886 (South Africa); Benatar, M.; Mabala, G. K.; Mutshena, K. P. [iThemba LABS, PO Box 722, Somerset West 7129 (South Africa); Physics Department, University of Cape Town, Rondebosch 7700 (South Africa); Federke, M.; Mullins, S. M. [Physics Department, University of Cape Town, Rondebosch 7700 (South Africa); Ncapayi, N. J.; Vymers, P. [iThemba LABS, PO Box 722, Somerset West 7129 (South Africa); Physics Department, University of the Western Cape, Private Bag X17, Belleville 7535 (South Africa)

    2011-10-28T23:59:59.000Z

    High spin states in {sup 196}Hg have been populated in the {sup 198}Pt({alpha},6n) reaction at 65 MeV and the level scheme has been extended. A new dipole band has been observed and a previously observed dipole has been confirmed. Excitation energies, spins and parities of these bands were determined from DCO ratio and linear polarization measurements. Possible quasiparticle excitations responsible for these structures are discussed.

  10. 13286 J. Phys. Chem. 1994,98, 13286-13293 Kinetics of Ti(a3F,a5F)and V(a4F,a6D)Depletion by NH3 and H2S

    E-Print Network [OSTI]

    Clemmer, David E.

    ) and V(a6D) upon interactions with NH3 and HzS are studied in a fast-flow reactor at a He pressure of 0) x Introduction Information about the gas-phase kinetics for the reactions of simple molecules studied the activation of NH3 and H2S by neutral titanium and vanadium atoms. In addition to the gas

  11. Observation of superdeformation in sup 191 Hg

    SciTech Connect (OSTI)

    Moore, E.F.; Janssens, R.V.F.; Chasman, R.R.; Ahmad, I.; Khoo, T.L.; Wolfs, F.L.H. (Argonne National Laboratory, Argonne, Illinois 60439 (US)); Ye, D. (Argonne National Laboratory, Argonne, Illinois 60439 (US)); Beard, K.B. (Argonne National Laboratory, Argonne, Illinois 60439 (US)); Garg, U. (University of Notre Dame, Notre Dame, Indiana 46556); Drigert, M.W. (Idaho National Engineering Laboratory, EG G Idaho Inc., Idaho Falls, Idaho 83415); and others

    1989-07-24T23:59:59.000Z

    The first observation of superdeformation in the mass region {ital A}{congruent}190 is reported. A rotational band of twelve transitions with an average energy spacing of 37 keV, an average moment of inertia {ital scrF}{sup (2)} of 110 {h bar}{sup 2} MeV{sup {minus}1}, and an average quadrupole moment of 18{plus minus}3 {ital e} b has been observed in {sup 191}Hg; this band persists at low rotational frequency. These results are in excellent agreement with a calculation that predicts an ellipsoidal axis ratio of 1.65:1 for the superdeformed shape in this nucleus.

  12. Process of [sup 196]Hg enrichment

    DOE Patents [OSTI]

    Grossman, M.W.; Mellor, C.E.

    1993-04-27T23:59:59.000Z

    A simple rate equation model shows that by increasing the length of the photochemical reactor and/or by increasing the photon intensity in said reactor, the feedstock utilization of [sup 196]Hg will be increased. Two preferred embodiments of the present invention are described, namely (1) long reactors using long photochemical lamps and vapor filters; and (2) quartz reactors with external UV reflecting films. These embodiments have each been constructed and operated, demonstrating the enhanced utilization process dictated by the mathematical model (also provided).

  13. Process of .sup.196 Hg enrichment

    DOE Patents [OSTI]

    Grossman, Mark W. (Belmont, MA); Mellor, Charles E. (Salem, MA)

    1993-01-01T23:59:59.000Z

    A simple rate equation model shows that by increasing the length of the photochemical reactor and/or by increasing the photon intensity in said reactor, the feedstock utilization of .sup.196 Hg will be increased. Two preferred embodiments of the present invention are described, namely (1) long reactors using long photochemical lamps and vapor filters; and (2) quartz reactors with external UV reflecting films. These embodiments have each been constructed and operated, demonstrating the enhanced utilization process dictated by the mathematical model (also provided).

  14. N=2 Superfields and the M-Fivebrane

    E-Print Network [OSTI]

    N. D. Lambert; P. C. West

    1998-02-23T23:59:59.000Z

    In this paper we provide a manifestly N=2 supersymmetric formulation of the M-fivebrane in the presence of threebrane solitons. The superspace form of four-dimensional effective equations for the threebranes are readily obtained and yield the complete Seiberg-Witten equations of motion for N=2 super-Yang-Mills. A particularly simple derivation is given by introducing an N=2 superfield generalisation of the Seiberg-Witten differential.

  15. Unexpected Nondissociative Binding of N2O on Oxygen Vacancies...

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

    Nondissociative Binding of N2O on Oxygen Vacancies on a Rutile TiO2(110)-1×1 . Unexpected Nondissociative Binding of N2O on Oxygen Vacancies on a Rutile TiO2(110)-1×1 ....

  16. U01HG004279 (D.M.M.), U01HG004261 (E.L.), U01HG004274 (S.H.), and U41HG004269 (L.S.). Awards

    E-Print Network [OSTI]

    .T.N.), the Indiana Genomics Initiative (T.C.K.), H. Smith and the NIDDK genomics core laboratory (B.O.), NIH R01HG

  17. Higgs branch localization of 3d N=2 theories

    E-Print Network [OSTI]

    Masashi Fujitsuka; Masazumi Honda; Yutaka Yoshida

    2014-09-17T23:59:59.000Z

    We study N=2 supersymmetric gauge theories on squashed 3-sphere and S^1xS^2. Recent studies have shown that the partition functions in a class of N=2 theories have factorized forms in terms of vortex and anti-vortex partition functions by explicitly evaluating matrix integrals obtained from Coulomb branch localization. We directly derive this structure by performing Higgs branch localization. It turns out that more general N=2 theories have this factorization property. We also discuss the factorization of supersymmetric Wilson loop.

  18. Holography for N = 2[superscript *] on S[superscript 4

    E-Print Network [OSTI]

    Bobev, Nikolay

    We find the gravity dual of N = 2[superscript *] super-Yang-Mills theory on S [superscript 4] and use holography to calculate the universal contribution to the corresponding S [superscript 4] free energy at large N and ...

  19. Self-Dual Supergravity from N = 2 Strings

    SciTech Connect (OSTI)

    de Boer, J.; Skenderis, K.

    1997-09-24T23:59:59.000Z

    A new heterotic N = 2 string with manifest target space supersymmetry is constructed by combining a conventional N = 2 string in the right-moving sector and a Green-Schwarz-Berkovits type string in the left-moving sector. The corresponding sigma model is then obtained by turning on background fields for the massless excitations. We compute the beta functions and we partially check the OPE's of the superconformal algebra perturbatively in {alpha}{prime}, all in superspace. The resulting field equations describe N = 1 self-dual supergravity.

  20. N2-associated surface warming on early Mars

    E-Print Network [OSTI]

    von Paris, P; Rauer, H; Stock, J W

    2013-01-01T23:59:59.000Z

    Early Mars may have had a warmer and denser atmosphere allowing for the presence of liquid water on the surface. However, climate model studies have not been able to reproduce these conditions even with a CO2 atmosphere of several bars. Recent 3D simulations of the early Mars climate show that mean surface temperatures only slightly below 273K could be reached locally. We want to investigate the effect of increased partial pressures of N2 on early Mars' surface temperature by including pressure broadening of absorption lines and collision-induced N2-N2 absorption. A 1D radiative-convective cloud-free atmospheric model was used to calculate temperature profiles and surface conditions. We performed a parameter study varying the N2 partial pressures from 0 to 0.5bar at CO2 partial pressures between 0.02bar and 3bar. These values are consistent with existing estimates of the initial, pre-Noachian reservoir. Solar insolation was set to be consistent with the late Noachian. Our 1D global mean simulations clearly sh...

  1. Ris-PhD-14(EN) Production of N2O in grass-clover pastures

    E-Print Network [OSTI]

    source of the strong greenhouse gas nitrous oxide (N2O), and in soil N2O is mainly produced by nitrifying that only 3.2 ± 0.5 ppm of the recently fixed N2 was emitted as N2O on a daily basis. Thus, recently fixed N.3 N2O emission from grassland 13 1.4 N2O formation in urine patches 14 1.5 Greenhouse gas inventories

  2. Unique Thylakoid Membrane Architecture of aUnicellular N2-Fixing...

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

    Unique Thylakoid Membrane Architecture of aUnicellular N2-Fixing Cyanobacterium Revealedby Electron Tomography. Unique Thylakoid Membrane Architecture of aUnicellular N2-Fixing...

  3. Active transport, substrate specificity, and methylation of Hg(II) in anaerobic bacteria

    SciTech Connect (OSTI)

    Schasfer, Jeffra [Princeton University; Rocks, Sara [Princeton University; Zheng, Wang [ORNL; Liang, Liyuan [ORNL; Gu, Baohua [ORNL; Morel, Francois M [ORNL

    2011-01-01T23:59:59.000Z

    The formation of methylmercury (MeHg), which is biomagnified in aquatic food chains and poses a risk to human health, is effected by some iron- and sulfate-reducing bacteria (FeRB and SRB) in anaerobic environments. However, very little is known regarding the mechanism of uptake of inorganic Hg by these organisms, in part because of the inherent difficulty in measuring the intracellular Hg concentration. By using the FeRB Geobacter sulfurreducens and the SRB Desulfovibrio desulfuricans ND132 as model organisms, we demonstrate that Hg(II) uptake occurs by active transport. We also establish that Hg(II) uptake by G. sulfurreducens is highly dependent on the characteristics of the thiols that bind Hg(II) in the external medium, with some thiols promoting uptake and methylation and others inhibiting both. The Hg(II) uptake system of D. desulfuricans has a higher affinity than that of G. sulfurreducens and promotes Hg methylation in the presence of stronger complexing thiols. We observed a tight coupling between Hg methylation and MeHg export from the cell, suggesting that these two processes may serve to avoid the build up and toxicity of cellular Hg. Our results bring up the question of whether cellular Hg uptake is specific for Hg(II) or accidental, occurring via some essential metal importer. Our data also point at Hg(II) complexation by thiols as an important factor controlling Hg methylation in anaerobic environments.

  4. Photodesorption of ices I: CO, N2 and CO2

    E-Print Network [OSTI]

    Karin I. Oberg; Ewine F. van Dishoeck; Harold Linnartz

    2009-01-23T23:59:59.000Z

    A longstanding problem in astrochemistry is how molecules can be maintained in the gas phase in dense inter- and circumstellar regions. Photodesorption is a non-thermal desorption mechanism, which may explain the small amounts of observed cold gas in cloud cores and disk mid-planes. This paper aims to determine the UV photodesorption yields and to constrain the photodesorption mechanisms of three astrochemically relevant ices: CO, N2 and CO2. In addition, the possibility of co-desorption in mixed and layered CO:N2 ices is explored. The ice photodesorption is studied experimentally under ultra high vacuum conditions and at 15-60 K using a hydrogen discharge lamp (7-10.5 eV). The ice desorption during irradiation is monitored by reflection absorption infrared spectroscopy of the ice and simultaneous mass spectrometry of the desorbed molecules. Both the UV photodesorption yields per incident photon and the photodesorption mechanisms are molecule specific. CO photodesorbs without dissociation from the surface layer of the ice. N2, which lacks an electronic transition in this wavelength range, has a photodesorption yield that is more than an order of magnitude lower. This yield increases significantly due to co-desorption when N2 is mixed in with or layered on top of CO ice. CO2 photodesorbs through dissociation and subsequent recombination from the top 10 layers of the ice. At low temperatures (15-18 K) the derived photodesorption yields are 2.7x10^-3 and CO2 photodesorption yield is 1.2x10^-3x(1-e^(-X/2.9)) + 1.1x10^-3x(1-e^(-X/4.6)) molecules photon-1, where X is the ice thickness in monolayers and the two parts of the expression represent a CO2 and CO photodesorption pathway.

  5. Nonlocality from N>2 independent single-photon emitters

    SciTech Connect (OSTI)

    Thiel, C.; Wiegner, R.; Zanthier, J. von [Institut fuer Optik, Information und Photonik, Universitaet Erlangen-Nuernberg, D-91058 Erlangen (Germany); Agarwal, G. S. [Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078-3072 (United States)

    2010-09-15T23:59:59.000Z

    We demonstrate that intensity correlations of second order in the fluorescence light of N>2 single-photon emitters may violate locality while the visibility of the signal remains below 1/{radical}(2){approx_equal}71%. For this, we derive a homogeneous Bell-Wigner-type inequality, which can be applied to a broad class of experimental setups. We trace the violation of this inequality back to path entanglement created by the process of detection.

  6. HgMn Stars as apparent X-ray emitters

    E-Print Network [OSTI]

    Hubrig, S; Mathys, G

    1998-01-01T23:59:59.000Z

    In the ROSAT all-sky survey 11 HgMn stars were detected as soft X-ray emitters (Berghoefer, Schmitt & Cassinelli 1996). Prior to ROSAT, X-ray observations with the Einstein Observatory had suggested that stars in the spectral range B5-A7 are devoid of X-ray emission. Since there is no X-ray emitting mechanism available for these stars (also not for HgMn stars), the usual argument in the case of an X-ray detected star of this spectral type is the existence of an unseen low-mass companion which is responsible for the X-ray emission. The purpose of the present work is to use all available data for our sample of X-ray detected HgMn stars and conclude on the nature of possible companions.

  7. The new Hg-rich barium indium mercurides BaIn{sub x}Hg{sub 7?x} (x=3.1) and BaIn{sub x}Hg{sub 11?x} (x=0–2.8)

    SciTech Connect (OSTI)

    Wendorff, Marco; Schwarz, Michael; Röhr, Caroline, E-mail: caroline@ruby.chemie.uni-freiburg.de

    2013-07-15T23:59:59.000Z

    The title compounds BaIn{sub x}Hg{sub 7?x} (x=3.1(1)) and BaIn{sub x}Hg{sub 11?x} (x=0–2.8) were synthesized from stoichiometric ratios of the elements in Ta crucibles. Their crystal structures have been determined using single crystal X-ray data. BaIn{sub x}Hg{sub 7?x} (x=3.1(1)) crystallizes in a new structure type (orthorhombic, oC16, space group Cmmm: a=512.02(1), b=1227.68(3), c=668.61(2) pm, Z=2, R1=0.0311). In the structure, the atoms of the three crystallographically different mixed In/Hg positions form planar nets of four-, six- and eight-membered rings. These nets are shifted against each other such that the four-membered rings form empty distorted cubes. The cubes are connected via common edges, corners and folded ladders, which are also found in BaIn{sub 2}/BaHg{sub 2} (KHg{sub 2} structure type) and BaIn (?-NaHg type). The Ba atoms are centered in the eight-membered rings and exhibit an overall coordination number of 20. The [BaM{sub 20}] polyhedra and twice as many distorted [M{sub 8}] cubes tesselate the space. BaIn{sub 2.8}Hg{sub 8.2} (cubic, cP36, space group Pm3{sup ¯}m, a=961.83(1) pm, Z=3, R1=0.0243) is the border compound of the phase width BaIn{sub x}Hg{sub 11?x} of the rare BaHg{sub 11} structure type. In the structure, ideal [M{sub 8}] cubes (at the corners of the unit cell) and BaM{sub 20} polyhedra (at the edges of the unit cell) represent the building blocks comparable to the other new In mercuride. In accordance with the increased In/Hg content, additional M-pure regions appear: the center of the unit cell contains a huge [Hg(1)M(2){sub 12}M(3,4){sub 32}] polyhedron, a Hg-centered cuboctahedron of In/Hg atoms surrounded by a capped cantellated cube of 32 additional M atoms. For both structure types, the bonding situation and the ‘coloring’, i.e. the In/Hg distribution of the polyanionic network, are discussed considering the different sizes of the atoms and the charge distribution (Bader AIM charges), which have been calculated within the framework of FP-LAPW density functional theory. - Graphical abstract: BaIn{sub 2.6}Hg{sub 4.4}: distorted cubes [(In/Hg){sub 8}] (green, like in BaHg{sub 11}), folded ladders (violet, like in BaIn, BaHg{sub 2} and BaIn{sub 2}) and Ba coordination polyhedra [Ba(In/Hg){sub 20}] (blue, like in BaHg{sub 11}). - Highlights: • The Hg-rich In-mercuride BaIn{sub 3.1}Hg{sub 3.9} crystallizes with a singular structure type. • The phase width of the BaHg{sub 11} structure in BaIn{sub x}Hg{sub 11-x} ends at x=2.8. • The relations of both compounds with other alkaline-earth mercurides are outlined. • The Hg/In coloring of the polyanion is discussed considering the structure features. • Bonding aspects are explored using band structure calculations.

  8. Coadsorption of sulfate/bisulfate anions with Hg cations during Hg underpotential deposition on Au(111): An in situ x-ray diffraction study

    SciTech Connect (OSTI)

    Li, J.; Abruna, H.D. [Cornell Univ., Ithaca, NY (United States)] [Cornell Univ., Ithaca, NY (United States)

    1997-01-09T23:59:59.000Z

    The first stage of mercury underpotential deposition on Au(111) electrodes in 0.10 M H{sub 2}SO{sub 4} containing 1.0 mM Hg{sup 2+} has been studied by synchrotron X-ray scattering techniques including grazing incidence X-ray diffraction and specular crystal truncation rod measurements. An ordered coadsorbed structure of sulfate/bisulfate anions and Hg cations was found at potentials between the first and second Hg UPD peaks (+0.80 V > E > +0.88 V vs Ag/AgCl(3 M KCl)). The coadsorption structure was found to consist of a compressed Hg honeycomb lattice with the honeycomb centers occupied by sulfate or bisulfate anions. The compression of the lattice is likely due to the formation of mercurous (Hg{sub 2}{sup 2+}) ions which have a much shorter Hg-Hg distance than that in frozen bulk Hg crystals. The net charge transferred under the first Hg UPD peak suggests that the chemical state of the species in the coadsorbed structure is likely Hg{sub 2}SO{sub 4}. Our results indicate that both the chemical state of the mercury cations and the nature of the anions are important in the resulting electrodeposited structures. 38 refs., 8 figs., 1 tab.

  9. Photoinduced Oxidation of Hg0 in the Waters from the St.

    E-Print Network [OSTI]

    Morel, François M. M.

    -A induced reactions. Doubling UV irradiation did not increase the reaction rate of Hg0 photooxidation food chain. Understanding the parameters that govern Hg0 oxidation is therefore crucial to assess

  10. On-line method of determining utilization factor in Hg-196 photochemical separation process

    DOE Patents [OSTI]

    Grossman, Mark W. (Belmont, MA); Moskowitz, Philip E. (Peabody, MA)

    1992-01-01T23:59:59.000Z

    The present invention is directed to a method for determining the utilization factor [U] in a photochemical mercury enrichment process (.sup.196 Hg) by measuring relative .sup.196 Hg densities using absorption spectroscopy.

  11. Anthropogenic and Natural Emissions of Mercury (Hg) in the northeastern United Jeffrey MacAdam Sigler

    E-Print Network [OSTI]

    Lee, Xuhui

    Abstract Anthropogenic and Natural Emissions of Mercury (Hg) in the northeastern United States impact may depend on the emission rate. Anthropogenic Hg emissions in the United States are poorly characterized. Natural Hg emissions are poorly understood worldwide, due to lack of data or measurement systems

  12. A Hydrogen-Evolving Ni(P2N2)2 Electrocatalyst Covalently Attached...

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

    A Hydrogen-Evolving Ni(P2N2)2 Electrocatalyst Covalently Attached to a Glassy Carbon Electrode: Preparation, Characterization, A Hydrogen-Evolving Ni(P2N2)2 Electrocatalyst...

  13. Accurate dipole polarizabilities for water clusters n=2-12 at...

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

    dipole polarizabilities for water clusters n2-12 at the coupled-cluster level of theory and benchmarking of various Accurate dipole polarizabilities for water clusters n2-12 at...

  14. Offsetting the radiative benefit of ocean iron fertilization by enhancing N2O emissions

    E-Print Network [OSTI]

    Gruber, Nicolas

    from the atmospheric CO2 reduction significantly, because N2O is a much more powerful greenhouse gas

  15. Global distribution of N2O emissions from aquatic systems: natural emissions and anthropogenic eects

    E-Print Network [OSTI]

    Seitzinger, Sybil

    Global distribution of N2O emissions from aquatic systems: natural emissions and anthropogenic, are increasing due to human activities. Our analysis suggests that a third of global anthropogenic N2O emission the remainder. Over 80% of aquatic anthropogenic N2O emissions are from the Northern Hemisphere mid

  16. Synthesis and growth of HgI{sub 2} nanocrystals in a glass matrix: Heat treatment

    SciTech Connect (OSTI)

    Condeles, J. F., E-mail: condeles@fisica.uftm.edu.br, E-mail: ricssilva@yahoo.com.br; Silva, R. S., E-mail: condeles@fisica.uftm.edu.br, E-mail: ricssilva@yahoo.com.br [Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, 38025-180, Uberaba, MG (Brazil); Silva, A. C. A.; Dantas, N. O. [Laboratório de Novos Materiais Isolantes e Semicondutores (LNMIS), Instituto de Física, Universidade Federal de Uberlandia, 38400-902, Uberlândia, MG (Brazil)

    2014-08-14T23:59:59.000Z

    Mercury iodide (HgI{sub 2}) nanocrystals (NCs) were successfully grown in a barium phosphate glass matrix synthesized by fusion. Growth control of HgI{sub 2} NCs was investigated by Atomic Force Microscopy (AFM), Optical Absorption (OA), Fluorescence (FL), and X-ray diffraction (XRD). AFM images reveal the formation of HgI{sub 2} nanocrystals in host glass matrix. HgI{sub 2} NCs growth was evidenced by an OA and FL band red-shift with increasing annealing time. XRD measurements revealed the ? crystalline phase of the HgI{sub 2} nanocrystals.

  17. Crystal Growth And Characterization of the Model High-Temperature Superconductor HgBa{sub 2}CuO{sub 4+{delta}}

    SciTech Connect (OSTI)

    Zhao, Xudong; Yu, Guichuan; Cho, Yong-Chan; Chabot-Couture, Guillaume; Barisic, Neven; Bourges, Philippe; Kaneko, Nobuhisa; Li, Yuan; Lu, Li; Motoyama, Eugene M.; Vajk,; Greven, Martin; /Stanford U., Appl. Phys. Dept. /SLAC, SSRL /Jilin U. /Stanford U., Phys. Dept. /Saclay /NIST, Wash., D.C.

    2007-03-16T23:59:59.000Z

    Since the discovery of high-transition-temperature (T{sub c}) superconductivity in La{sub 2-x}Ba{sub x}CuO{sub 4} in 1986, the study of the lamellar copper oxides has remained at the forefront of condensed matter physics. Apart from their unusually high values of T{sub c}, these materials also exhibit a variety of complex phenomena and phases. This rich behavior is a consequence of the lamellar crystal structures, formed of copper-oxygen sheets separated by charge reservoir layers, and of the strong electron-electron correlations in the copper-oxygen sheets. After two decades of intensive research, which has stimulated many valuable new insights into correlated electron systems in general, there remains a lack of consensus regarding the correct theory for high-T{sub c} superconductivity. The ultimate technological goal of room-temperature superconductivity might only be attained after the development of a deeper understanding of the mercury-based compounds HgBa{sub 2}Ca{sub n-1}Cu{sub n}OI{sub 2n+2+{delta}}, which currently exhibit the highest T{sub c}values. One very important issue in this regard is the role of electronic versus chemical and structural inhomogeneities in these materials, and the associated need to separate material-specific properties from those that are essential to superconductivity. Unfortunately, there has been remarkably little scientific work on the mercury-based compounds because sizable crystals have not been available; quantitative measurements of any kind would be invaluable benchmarks for testing the theories of high-T{sub c} superconductivity. The compounds HgBa{sub 2}Ca{sub n-1}Cu{sub n}OI{sub 2n+2+{delta}} can be viewed as model systems not only because of their record high-T{sub c} values, but also because of their high-symmetry crystal structures. Of particular interest is the simplest member of this materials family, HgBa{sub 2}CuO{sub 4+{delta}} (Hg1201), which possesses only one copper-oxygen sheet per unit cell (n = 1), as shown schematically in Figure 1a. The largest crystals obtained by previous growth methods do not exceed 1 mm{sup 3}, and hence are insufficient in size for detailed studies by many experimental techniques. Here we report a novel recipe for the growth of Hg1201 crystals as well as detailed sample characterization results, including initial inelastic magnetic neutron scattering data. We note that samples grown by the method described here have already enabled recent optical conductivity, inelastic X-ray scattering, and angle-resolved photoemission studies.

  18. Structure and critical function of Fe and acid sites in Fe-ZSM-5 in propane oxidative dehydrogenation with N2O and N2O decomposition

    E-Print Network [OSTI]

    Sklenak, Stepan

    Structure and critical function of Fe and acid sites in Fe-ZSM-5 in propane oxidative species Steamed Fe-zeolites Mössbauer spectroscopy UV­Vis FTIR H2-TPR N2O decomposition Propane oxidative of propane to propene with N2O. The evacuated non-steamed FeH-ZSM-5 contained high concentration of Brønsted

  19. N=2 cascade revisited and the enhancon bearings

    SciTech Connect (OSTI)

    Benini, Francesco [Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States); SISSA and INFN-Sezione di Trieste Via Beirut 2, I 34014 Trieste (Italy); Bertolini, Matteo [SISSA and INFN-Sezione di Trieste Via Beirut 2, I 34014 Trieste (Italy); Closset, Cyril [Physique Theorique et Mathematique and International Solvay Institutes, Universite Libre de Bruxelles, C.P. 231, 1050 Bruxelles (Belgium); Cremonesi, Stefano [SISSA and INFN-Sezione di Trieste Via Beirut 2, I 34014 Trieste (Italy); Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics and Astronomy, Tel-Aviv University, Ramat-Aviv 69978 (Israel)

    2009-03-15T23:59:59.000Z

    Supergravity backgrounds with varying fluxes generated by fractional branes at nonisolated Calabi-Yau singularities had escaped a precise dual field theory interpretation so far. In the present work, considering the prototypical example of such models, the CxC{sup 2}/Z{sub 2} orbifold, we propose a solution for this problem, and show that the known cascading solution corresponds to a vacuum on the Coulomb branch of the corresponding quiver gauge theory involving a sequence of strong coupling transitions reminiscent of the baryonic root of N=2 supersymmetric quantum chromodynamics . We also find a slight modification of this cascading vacuum which upon mass deformation is expected to flow to the Klebanov-Strassler cascade. Finally, we discuss an infinite class of vacua on the Coulomb branch whose renormalization group flows include infinitely coupled conformal regimes, and explain their gravitational manifestation in terms of new geometric structures that we dub enhancon bearings. Repulson-free backgrounds dual to all the vacua we analyze are explicitly provided.

  20. Hairy black holes in N=2 gauged supergravity

    E-Print Network [OSTI]

    Faedo, Federico; Nozawa, Masato

    2015-01-01T23:59:59.000Z

    We construct black holes with scalar hair in a wide class of four-dimensional N=2 Fayet-Iliopoulos gauged supergravity theories that are characterized by a prepotential containing one free parameter. Considering the truncated model in which only a single real scalar survives, the theory is reduced to an Einstein-scalar system with a potential, which admits at most two AdS critical points and is expressed in terms of a real superpotential. Our solution is static, admits maximally symmetric horizons, asymptotically tends to AdS space corresponding to an extremum of the superpotential, but is disconnected from the Schwarzschild-AdS family. The condition under which the spacetime admits an event horizon is addressed for each horizon topology. It turns out that for hyperbolic horizons the black holes can be extremal. In this case, the near-horizon geometry is AdS_2 x H^2, where the scalar goes to the other, non-supersymmetric, critical point of the potential. Our solution displays fall-off behaviours different fro...

  1. Hairy black holes in N=2 gauged supergravity

    E-Print Network [OSTI]

    Federico Faedo; Dietmar Klemm; Masato Nozawa

    2015-05-22T23:59:59.000Z

    We construct black holes with scalar hair in a wide class of four-dimensional N=2 Fayet-Iliopoulos gauged supergravity theories that are characterized by a prepotential containing one free parameter. Considering the truncated model in which only a single real scalar survives, the theory is reduced to an Einstein-scalar system with a potential, which admits at most two AdS critical points and is expressed in terms of a real superpotential. Our solution is static, admits maximally symmetric horizons, asymptotically tends to AdS space corresponding to an extremum of the superpotential, but is disconnected from the Schwarzschild-AdS family. The condition under which the spacetime admits an event horizon is addressed for each horizon topology. It turns out that for hyperbolic horizons the black holes can be extremal. In this case, the near-horizon geometry is AdS_2 x H^2, where the scalar goes to the other, non-supersymmetric, critical point of the potential. Our solution displays fall-off behaviours different from the standard one, due to the fact that the mass parameter $m^2=-2/\\ell^2$ at the supersymmetric vacuum lies in a characteristic range $m^2_{BF}\\le m^2\\le m^2_{\\rm BF}+\\ell^{-2}$ for which the slowly decaying scalar field is also normalizable. Nevertheless, we identify a well-defined mass for our spacetime, following the prescription of Hertog and Maeda. Quite remarkably, the product of all horizon areas is not given in terms of the asymptotic cosmological constant alone, as one would expect in absence of electromagnetic charges and angular momentum. Our solution shows qualitatively the same thermodynamic behaviour as the Schwarzschild-AdS black hole, but the entropy is always smaller for a given mass and AdS curvature radius. We also find that our spherical black holes are unstable against radial perturbations.

  2. Kazama-Suzuki Models of N=2 Superconformal Field Theory and Manin triples

    E-Print Network [OSTI]

    S. E. Parkhomenko

    2014-11-08T23:59:59.000Z

    Kazama-Suzuki coset models is an interesting class of N=2 supersymmetric models of conformal field theory which are used to build realistic models of superstring in 4 dimensions. We formulate Kazama-Suzuki construction of N=2 superconformal coset models using more general language of Manin triples and represent the corresponding N=2 Virasoro superalgebra currents in explicit form. A correspondence between the Kazama-Suzuki models and Poisson homogeneous spaces is established also.

  3. The inverse conductivity problem with power densities in dimension n2

    E-Print Network [OSTI]

    François Monard, Guillaume Bal

    2012-06-19T23:59:59.000Z

    Jun 19, 2012 ... The inverse conductivity problem with power densities in dimension n ? 2. François Monard Guillaume Bal. Dept. of Applied Physics and ...

  4. Generalised CP and $\\Delta (6n^2)$ Family Symmetry in Semi-Direct Models of Leptons

    E-Print Network [OSTI]

    Ding, Gui-Jun; Neder, Thomas

    2014-01-01T23:59:59.000Z

    We perform a detailed analysis of $\\Delta (6n^2)$ family symmetry combined with a generalised CP symmetry in the lepton sector, breaking to different remnant symmetries $G_{\

  5. Processes prevent detrimental effects from As and Hg in feedstocks

    SciTech Connect (OSTI)

    Sarrazin, P.; Cameron, C.J.; Barthel, Y. (Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France)); Morrison, M.E. (IFP Enterprises Texas Inc., Houston, TX (United States))

    1993-01-25T23:59:59.000Z

    The wide range of mercury and arsenic species sometimes present in raw condensates or crude oils can cause major problems such as corrosion and reduced catalyst life. This paper reports on simple, low-investment, feedstock treatment procedures which have been developed that eliminate both As and Hg impurities with very high efficiencies. During the past 20 years, refiners and petrochemical producers have experienced a serious increase in catalyst poisoning caused by mercury and arsenic. This phenomenon may be partically explained by the diversification of the feedstock supply resulting from the need to optimize the profitability of refining and petrochemical operations. The utilization of a more diverse feedstock supply containing metal impurities has led to operating problems such as corrosion of aluminum alloys in steam cracker cold boxes.

  6. Optical characteristics of a HgBr excilamp

    SciTech Connect (OSTI)

    Malinina, A A; Malinin, A N; Shuaibov, A K [Uzhgorod National University, Uzhgorod (Ukraine)

    2013-08-31T23:59:59.000Z

    Optical characteristics of a coaxial HgBr excilamp on multicomponent mercury dibromide vapour mixtures with helium, nitrogen and sulfur hexafluoride are investigated under pumping by a pulse-periodic barrier discharge. Stable excilamp operation was demonstrated at a pump pulse repetition rate of 3 – 9 kHz. The component composition of the working system was determined, which provides a maximal average and pulsed specific radiation power of 48.8 mW cm{sup -3} and 40.6 W cm{sup -3}, respectively, at the efficiency of 7.3 % in the blue-green spectral range with the maximal radiation intensity at the wavelength of 502 nm. The reduction in the radiation power after 2.5 × 10{sup 6} shots is 5 %. Interpretation is given for the results of optimisation of excilamp characteristics. (optical radiation sources)

  7. RESEARCH ARTICLE Greenhouse gas emissions (CO2, CH4, and N2O) from several

    E-Print Network [OSTI]

    Wehrli, Bernhard

    RESEARCH ARTICLE Greenhouse gas emissions (CO2, CH4, and N2O) from several perialpine and alpine hydropower reservoirs by diffusion and loss in turbines T. Diem · S. Koch · S. Schwarzenbach · B. Wehrli · C investigated greenhouse gas emissions (CO2, CH4, and N2O) from reservoirs located across an altitude gradient

  8. 15N2 formation and fast oxygen isotope exchange during pulsed...

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

    N2 formation and fast oxygen isotope exchange during pulsed 15N18O exposure of MnOxCeO2. 15N2 formation and fast oxygen isotope exchange during pulsed 15N18O exposure of MnOx...

  9. Siemens AG, CT IC 4, H.-G. Zimmermann1 CORPORATETECHNOLOGY

    E-Print Network [OSTI]

    Schmidhuber, Juergen

    © Siemens AG, CT IC 4, H.-G. Zimmermann1 CORPORATETECHNOLOGY System Identification & Forecasting with Advanced Neural Networks Principles, Techniques, Applications Hans Georg Zimmermann Siemens AG Email : Hans_Georg.Zimmermann@siemens.com © Siemens AG, CT IC 4, H.-G. Zimmermann2 CORPORATETECHNOLOGY . . . . ! " i ii wxw 0 w1 wn xn x1 Distinct

  10. Frequency Ratio of ${}^{199}$Hg and ${}^{87}$Sr Optical Lattice Clocks beyond the SI Limit

    E-Print Network [OSTI]

    Yamanaka, Kazuhiro; Ushijima, Ichiro; Takamoto, Masao; Katori, Hidetoshi

    2015-01-01T23:59:59.000Z

    We report on a frequency ratio measurement of a ${}^{199}$Hg-based optical lattice clock referencing a ${}^{87}$Sr-based clock. Evaluations of lattice light shift, including atomic-motion-dependent shift, enable us to achieve a total systematic uncertainty of $7.2 \\times 10^{-17}$ for the Hg clock. The frequency ratio is measured to be $\

  11. INELASTIC NEUTRON SCATTERING SELECTION RULES OF 03B1 HgI2 M. SIESKIND

    E-Print Network [OSTI]

    Boyer, Edmond

    899 INELASTIC NEUTRON SCATTERING SELECTION RULES OF 03B1 HgI2 M. SIESKIND Laboratoire de The inelastic neutron scattering selection rules of 03B1 HgI2 in the directions 0394, 03A3 and 039B are derived Abstracts 63.20D Introduction. - Inelastic neutron scattering is a powerful technique for the determination

  12. SmartHG: Energy Demand Aware Open Services for Smart Grid Intelligent Automation

    E-Print Network [OSTI]

    Tronci, Enrico

    solar panels)], for each time slot (say each hour) the DNO price policy defines an interval of energySmartHG: Energy Demand Aware Open Services for Smart Grid Intelligent Automation Enrico Tronci.prodanovic,jorn.gruber, barry.hayes}@imdea.org I. INTRODUCTION The SmartHG project [1], [2] has the goal of developing

  13. Pressure dependence of the superconducting critical temperature of HgBa 2Ca 2Cu 3O 8 y and HgBa 2Ca 3Cu 4O 10 y up to 30 GPa

    E-Print Network [OSTI]

    Wijngaarden, Rinke J.

    Pressure dependence of the superconducting critical temperature of HgBa 2Ca 2Cu 3O 8 y and HgBa 2Ca of the reported pressure- induced Tc values well above 150 K in the mercury-based high-Tc superconductors has been superconducting transition temperature Tc have been observed in HgBa2Ca2Cu3O8 y Hg-1223 samples under very high

  14. Legacy Hg-Cu Contamination of Active Stream Sediments in the Gold Hill Mining District, North Carolina

    E-Print Network [OSTI]

    Lecce, Scott A.

    geoquímicos secundarios, y fuentes de meteorización de minerales. Más del 45 por ciento de la variación de Hg

  15. Selective Catalytic Oxidation (SCO) of NH3 to N2 for Hot Exhaust...

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

    Oxidation (SCO) of NH3 to N2 for Hot Exhaust Treatment Investigation of a series of transition metal oxides and precious metal based catalysts for ammonia selective oxidation at...

  16. Classical M-Fivebrane Dynamics and Quantum N=2 Yang-Mills

    E-Print Network [OSTI]

    P. S. Howe; N. D. Lambert; P. C. West

    1997-11-05T23:59:59.000Z

    We obtain the complete quantum Seiberg-Witten effective action for N=2 supersymmetric SU(N) Yang-Mills theory from the classical M-fivebrane equations of motion with N threebranes moving in its worldvolume.

  17. The development of N2S2 metal complexes as bidentate ligands for organometallic chemistry

    E-Print Network [OSTI]

    Rampersad, Marilyn Vena

    2007-04-25T23:59:59.000Z

    Where Noted, for the Carbonyl Carbons in [(NiN2S2)W(CO)4] Complexes with the CO Designations.............................................................................................54 III-5. Half-Wave and Anodic Potentials for Reductions.... Stick drawings illustrating a) mutual buckling of the NiN2S2 ligand and Pd(C(O)CH3(Cl) unit at the sulfur hinges and b) carbonyl acetyl bond rotation...

  18. Atmospheric O2//N2 changes, 19932002: Implications for the partitioning of fossil fuel CO2 sequestration

    E-Print Network [OSTI]

    Ho, David

    Atmospheric O2//N2 changes, 1993­­2002: Implications for the partitioning of fossil fuel CO2. Cassar (2005), Atmospheric O2/N2 changes, 1993­2002: Implications for the partitioning of fossil fuel CO2. The O2/N2 ratio of air is falling because combustion of fossil fuel and biomass both con- sume O2

  19. Gauge/Gravity Duality, Green Functions of N=2 SYM and Radial/Energy-Scale Relation

    E-Print Network [OSTI]

    Xiao-Jun Wang; Seng Hu

    2002-07-19T23:59:59.000Z

    We consider supergravity configuration of D5 branes wrapped on supersymmetric 2-cycles and use it to calculate one-point and two-point Green functions of some special operators in N=2 super Yang-Mills theory. We show that Green functions obtained from supergravity include two very different parts. One of them corresponds to perturbative results of quantum field theory, and another is a non-perturbative effect which corresponds to contribution from instantons with fractional charge. Comparing Green functions obtained from supergravity and gauge theory, we obtain radial/energy-scale relation for this gauge/gravity correspondence with N=2 supersymmetry. This relation leads right beta-function of N=2 SYM from supergravity configuration.

  20. The new barium zinc mercurides Ba{sub 3}ZnHg{sub 10} and BaZn{sub 0.6}Hg{sub 3.4} - Synthesis, crystal and electronic structure

    SciTech Connect (OSTI)

    Schwarz, Michael; Wendorff, Marco [Institut fuer Anorganische und Analytische Chemie, University of Freiburg, Albertstr. 21, D-79104 Freiburg (Germany)] [Institut fuer Anorganische und Analytische Chemie, University of Freiburg, Albertstr. 21, D-79104 Freiburg (Germany); Roehr, Caroline, E-mail: caroline@ruby.chemie.uni-freiburg.de [Institut fuer Anorganische und Analytische Chemie, University of Freiburg, Albertstr. 21, D-79104 Freiburg (Germany)] [Institut fuer Anorganische und Analytische Chemie, University of Freiburg, Albertstr. 21, D-79104 Freiburg (Germany)

    2012-12-15T23:59:59.000Z

    The title compounds Ba{sub 3}ZnHg{sub 10} and BaZn{sub 0.6}Hg{sub 3.4} were synthesized from stoichiometric ratios of the elements in Ta crucibles. Their crystal structures, which both represent new structure types, have been determined using single crystal X-ray data. The structure of Ba{sub 3}ZnHg{sub 10} (orthorhombic, oP28, space group Pmmn, a=701.2(3), b=1706.9(8), c=627.3(3)pm, Z=2, R1=0.0657) contains folded 4{sup 4} Hg nets, where the meshes form the bases of flat rectangular pyramids resembling the structure of BaAl{sub 4}. The flat pyramids are connected via Hg-Zn/Hg bonds, leaving large channels at the folds, in which Ba(1) and Hg(2) atoms alternate. Whereas the remaining Hg/Zn atoms form a covalent 3D network of three- to five-bonded atoms with short M-M distances (273-301 pm; CN 9-11), the Hg(2) atoms in the channels adopt a comparatively large coordination number of 12 and increased distances (317-348 pm) to their Zn/Hg neighbours. In the structure of BaZn{sub 0.6}Hg{sub 3.4} (cubic, cI320, space group I4{sup Macron }3d, a=2025.50(7) pm, Z=64, R1=0.0440), with a chemical composition not much different from that of Ba{sub 3}ZnHg{sub 10}, the Zn/Hg atoms of the mixed positions M(1/2) are arranged in an slightly distorted primitive cubic lattice with a 4 Multiplication-Sign 4 Multiplication-Sign 4 subcell relation to the unit cell. The 24 of the originating 64 cubes contain planar cis tetramers Hg(5,6){sub 4} with Hg in a nearly trigonal planar or tetrahedral coordination. In another 24 of the small cubes, two opposing faces are decorated by Hg(3,4){sub 2} dumbbells, two by Ba(2) atoms respectively. The third type of small cubes are centered by Ba(1) atoms only. The complex 3D polyanionic Hg/Zn network thus formed is compared with the Hg partial structure in Rb{sub 3}Hg{sub 20} applying a group-subgroup relation. Despite their different overall structures, the connectivity of the negatively charged Hg atoms, the rather metallic Zn bonding characteristic (as obtained from FP-LAPW band structure calculations) and the coordination number of 16 for all Ba cations relate the two title compounds. - Graphical abstract: Six of the 64 small sub-cubes of three types (A, B, C) forming the unit cell of the Hg-rich mercuride BaZn{sub 0.6}Hg{sub 3.4}. Highlights: Black-Right-Pointing-Pointer Two new Hg-rich Ba mercurides, both synthesized from the elements in pure phase. Black-Right-Pointing-Pointer BaZn{sub 0.6}HgG{sub 3.4} and Ba{sub 3}ZnHg{sub 10} with new complex structure types. Black-Right-Pointing-Pointer Structure relation to other complex cubic intermetallics. Black-Right-Pointing-Pointer Discussion of covalent and metallic bonding aspects, as found by the structure features and band structure calculations.

  1. Speciation, characterization, and mobility of As, Se, and Hg in flue gas desulphurization residues

    SciTech Connect (OSTI)

    Souhail R. Al-Abed; Gautham Jegadeesan; Kirk G. Scheckel; Thabet Tolaymat [United States Environmental Protection Agency, Cincinnati, OH (United States). National Risk Management Research Laboratory

    2008-03-01T23:59:59.000Z

    Flue gas from coal combustion contains significant amounts of volatile toxic trace elements such as arsenic (As), selenium (Se), and mercury (Hg). The capture of these elements in the flue gas desulphurization (FGD) scrubber unit has resulted in generation of a metal-laden residue. With increasing reuse of the FGD residues in beneficial applications, it is important to determine metal speciation and mobility to understand the environmental impact of its reuse. In this paper, we report the solid phase speciation of As, Se, and Hg in FGD residues using X-ray absorption spectroscopy (XAS), X-ray fluorescence spectroscopy (XRF), and sequential chemical extraction (SCE) techniques. The SCE results combined with XRF data indicated a strong possibility of As association with iron oxides, whereas Se was distributed among all geochemical phases. Hg appeared to be mainly distributed in the strong-complexed phase. XRF images also suggested a strong association of Hg with Fe oxide materials within FGD residues. XAS analysis indicated that As existed in its oxidized state (As(V)), whereas Se and Hg was observed in primarily reduced states as selenite (Se(IV)) and Hg(I), respectively. The results from the SCE and variable pH leaching tests indicated that the labile fractions of As, Se, and Hg were fairly low and thus suggestive of their stability in the FGD residues. However, the presence of a fine fraction enriched in metal content in the FGD residue suggested that size fractionation is important in assessing the environmental risks associated with their reuse. 34 refs., 3 figs., 4 tabs.

  2. What can topology changes in the oddball N2 reveal about underlying processes?

    E-Print Network [OSTI]

    Nieuwenhuis, Sander

    of Victoria, Victoria, British Columbia, Canada Correspondence to Christopher M. Warren, MSc, Department of Psychology, University of Victoria, Courier: Room A234, Cornett Building, PO BOX 3050, STN CSC, Victoria, BC 18 July 2011 accepted 7 August 2011 The N2 is a negative deflection in the human event- related brain

  3. Shock-Tube Study of Methane Ignition with NO2 and N2O

    E-Print Network [OSTI]

    Pemelton, John

    2012-10-19T23:59:59.000Z

    . The experimental pressure range was 1 - 44 atm and the temperature range tested was 1177 – 2095 K. The additives NO2 and N2O were added in concentrations from 831 ppm to 3539 ppm. The results of the mixtures with NO2 have a reduction in ignition delay time across...

  4. Temperature Dependence of Scott Thermomagnetic Torque in N2, Ch4, and Hd

    E-Print Network [OSTI]

    Adair, Thomas W.

    1972-01-01T23:59:59.000Z

    curve'which has a maxi- mum value at a field-to-pressure .ratio (P/P) ~. The temperature dependence of (JI/P) ~ for N2 and CH4 has been measured, and from these data the value for the optimum ratio of preces- sion frequency to collision frequency...

  5. Exact beta-functions in softly-broken N=2 Chern-Simons matter theories

    E-Print Network [OSTI]

    I. Jack; C. Luckhurst

    2011-01-21T23:59:59.000Z

    We present exact results for the beta-functions for the soft-breaking parameters in softly-broken N=2 Chern-Simons matter theories in terms of the anomalous dimension in the unbroken theory. We check our results explicitly up to the two loop level.

  6. THE RADIO NUMBERS OF ALL GRAPHS OF ORDER n AND DIAMETER n -2

    E-Print Network [OSTI]

    Tomova, Maggy

    THE RADIO NUMBERS OF ALL GRAPHS OF ORDER n AND DIAMETER n - 2 KATHERINE BENSON, MATTHEW PORTER, AND MAGGY TOMOVA Abstract. A radio labeling of a connected graph G is a function c : V (G) Z+ such that for every two distinct vertices u and v of G distance(u, v) + |c(u) - c(v)| 1 + diameter(G). The radio

  7. The bioinorganic chemistry of N2S2 metal complexes: reactivity and ligating ability

    E-Print Network [OSTI]

    Golden, Melissa Lynn

    2005-08-29T23:59:59.000Z

    in its diazacycle backbone ring producing subtle differences in N2S2Ni geometry. Metallation of Ni-1?? with PdCl2, Pd(NO3)2, and NiBr2 produced three structural forms: Ni2Pd basket, Ni4Pd2 C4-paddlewheel, and Ni3 slant chair. In attempts to provide a...

  8. N2 DISSOCIATION IN THE MESOSPHERE DUE TO SECONDARY ELECTRONS DURING A SOLAR

    E-Print Network [OSTI]

    Ulich, Thomas

    ) Sodankylä Geophysical Observatory, Sodankylä, Finland. (pekka.verronen@fmi.fi/+358-9-19294603) Solar protonN2 DISSOCIATION IN THE MESOSPHERE DUE TO SECONDARY ELECTRONS DURING A SOLAR PROTON EVENT, Helsinki, Finland. (2) Institute of Astronomy of the Russian Academy of Sciences, Moscow, Russia. (3

  9. Aqueous phase nitration of phenol by N2O5 and ClNO2 

    E-Print Network [OSTI]

    Heal, Mathew R; Harrison, Mark A J; Cape, J Neil

    2007-01-01T23:59:59.000Z

    Nitrophenols are present in the atmospheric gas phase and in cloud and rainwater. Their formation via aqueous-phase reactions of phenol with the nitronium ion, NO2+, arising from N2O5 and ClNO2 partitioning into the aqueous phase, has been proposed...

  10. Enhancement of CO2/N2 selectivity in a metal-organic framework by cavity modification

    E-Print Network [OSTI]

    are a strong motivation to reduce CO2 emissions from industrial processes. Burning of fossil fuel to generate electricity is a major source of CO2 in the atmosphere, but the capture and sequestration of CO2 from flue gasEnhancement of CO2/N2 selectivity in a metal-organic framework by cavity modification Youn-Sang Bae

  11. Sminaire du Groupe N2IS Manipulation of chemicals in droplet-based microfluidics

    E-Print Network [OSTI]

    Ingrand, François

    Séminaire du Groupe N2IS Manipulation of chemicals in droplet-based microfluidics Le 06 Septembre TOULOUSE Cedex 4 Résumé Droplet-based microfluidics has a tremendous potential for the miniaturization of chemicals in microfluidic systems is therefore a key to reliably downscale the assays from microtiter plates

  12. CAHIER DU CAMPUS LOGISTIQUE N2 Des carrefours intelligents pour une meilleure gestion du

    E-Print Network [OSTI]

    Boyer, Edmond

    CAHIER DU CAMPUS LOGISTIQUE N°2 Des carrefours « intelligents » pour une meilleure gestion du gestion du trafic en milieu urbain nécessite le déploiement de solutions techniques innovantes pour Journal Européen des Systèmes Automatisés. MOTS-CLÉS : gestion du trafic, réseau de Petri hybride, système

  13. Distribution of the surface potential of epitaxial HgCdTe

    SciTech Connect (OSTI)

    Novikov, V. A., E-mail: novikovvadim@mail.ru; Grigoryev, D. V.; Bezrodnyy, D. A. [Tomsk State University, 634050, 36, Lenina Avenue, Tomsk (Russian Federation); Dvoretsky, S. A. [Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090, 13, pr. Lavrentieva, Novosibirsk (Russian Federation)

    2014-09-08T23:59:59.000Z

    We studied the distribution of surface potential of the Hg{sub 1?x}Cd{sub x}Te epitaxial films grown by molecular beam epitaxy. The studies showed that the variation of the spatial distribution of surface potential in the region of the V-defect can be related to the variation of the material composition of epitaxial film. The V-defect is characterized by increased of Hg content with respect to the composition of the solid solution of Hg{sub 1?x}Cd{sub x}Te epitaxial film. In this paper, it was demonstrated that the unformed V-defects can be observed together with the macroscopic V-defects on the epitaxial film surface. These unformed V-defects can allow the creation of a complex surface potential distribution profile due to the redistribution of the solid solution composition.

  14. Manifold and method of batch measurement of Hg-196 concentration using a mass spectrometer

    DOE Patents [OSTI]

    Grossman, M.W.; Evans, R.

    1991-11-26T23:59:59.000Z

    A sample manifold and method of its use has been developed so that milligram quantities of mercury can be analyzed mass spectroscopically to determine the [sup 196]Hg concentration to less than 0.02 atomic percent. Using natural mercury as a standard, accuracy of [+-]0.002 atomic percent can be obtained. The mass spectrometer preferably used is a commercially available GC/MS manufactured by Hewlett Packard. A novel sample manifold is contained within an oven allowing flow rate control of Hg into the MS. Another part of the manifold connects to an auxiliary pumping system which facilitates rapid clean up of residual Hg in the manifold. Sample cycle time is about 1 hour. 8 figures.

  15. Manifold and method of batch measurement of Hg-196 concentration using a mass spectrometer

    DOE Patents [OSTI]

    Grossman, Mark W. (Belmont, MA); Evans, Roger (N. Hampton, NH)

    1991-01-01T23:59:59.000Z

    A sample manifold and method of its use has been developed so that milligram quantities of mercury can be analyzed mass spectroscopically to determine the .sup.196 Hg concentration to less than 0.02 atomic percent. Using natural mercury as a standard, accuracy of .+-.0.002 atomic percent can be obtained. The mass spectrometer preferably used is a commercially available GC/MS manufactured by Hewlett Packard. A novel sample manifold is contained within an oven allowing flow rate control of Hg into the MS. Another part of the manifold connects to an auxiliary pumping system which facilitates rapid clean up of residual Hg in the manifold. Sample cycle time is about 1 hour.

  16. Study of asymmetric fission yield behavior from neutron-deficient Hg isotope

    SciTech Connect (OSTI)

    Perkasa, Y. S. [Department of Physics, Sunan Gunung Djati State Islamic University Bandung, Jl. A.H Nasution No. 105 Cibiru, Bandung (Indonesia); Waris, A., E-mail: awaris@fi.itb.ac.id; Kurniadi, R., E-mail: awaris@fi.itb.ac.id; Su'ud, Z., E-mail: awaris@fi.itb.ac.id [Nuclear Physics and Biophysics Research Division, Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesa No. 10 Bandung 40132 (Indonesia)

    2014-09-30T23:59:59.000Z

    A study of asymmetric fission yield behavior from a neutron-deficient Hg isotope has been conducted. The fission yield calculation of the neutron-deficient Hg isotope using Brownian Metropolis shape had showed unusual result at decreasing energy. In this paper, this interesting feature will be validated by using nine degree of scission shapes parameterization from Brosa model that had been implemented in TALYS nuclear reaction code. This validation is intended to show agreement between both model and the experiment result. The expected result from these models considered to be different due to dynamical properties that implemented in both models.

  17. Dielectric response of N2-Ar solid solutions in the audio frequency range S. Pilla,* J. A. Hamida, K. A. Muttalib, and N. S. Sullivan

    E-Print Network [OSTI]

    Muttalib, Khandker

    -long-range quadrupolar ordered phase phase IB .5,6 At intermediate N2 concentrations, 57 x(N2) 78 mol%, the lattice

  18. N=2 quiver gauge theories on A-type ALE spaces

    E-Print Network [OSTI]

    Ugo Bruzzo; Francesco Sala; Richard J. Szabo

    2014-10-27T23:59:59.000Z

    We survey and compare recent approaches to the computation of the partition functions and correlators of chiral BPS observables in $\\mathcal{N}=2$ gauge theories on ALE spaces based on quiver varieties and the minimal resolution $X_k$ of the $A_{k-1}$ toric singularity $\\mathbb{C}^2/\\mathbb{Z}_k$, in light of their recently conjectured duality with two-dimensional coset conformal field theories. We review and elucidate the rigorous constructions of gauge theories for a particular family of ALE spaces, using their relation to the cohomology of moduli spaces of framed torsion free sheaves on a suitable orbifold compactification of $X_k$. We extend these computations to generic $\\mathcal{N}=2$ superconformal quiver gauge theories, obtaining in these instances new constraints on fractional instanton charges, a rigorous proof of the Nekrasov master formula, and new quantizations of Hitchin systems based on the underlying Seiberg-Witten geometry.

  19. Vafa-Witten Theory on N=2 and N=4 Twisted Superspace in Four Dimensions

    E-Print Network [OSTI]

    Kato, Junji

    2009-01-01T23:59:59.000Z

    We construct a new off-shell twisted hypermultiplet with a scalar and an anti-self-dual tensor superfields. Using the N=2 twisted superspace formalism, we construct a Donaldson-Witten theory coupled to the hypermultiplet. We show that this action possesses the Vafa-Witten type N=4 twisted supersymmetry at the on-shell level. We also reconstruct the action using a N=4 twisted superconnection formalism.

  20. Vafa-Witten Theory on N=2 and N=4 Twisted Superspace in Four Dimensions

    E-Print Network [OSTI]

    Junji Kato; Akiko Miyake

    2008-08-25T23:59:59.000Z

    We construct a new off-shell twisted hypermultiplet with a scalar and an anti-self-dual tensor superfields. Using the N=2 twisted superspace formalism, we construct a Donaldson-Witten theory coupled to the hypermultiplet. We show that this action possesses the Vafa-Witten type N=4 twisted supersymmetry at the on-shell level. We also reconstruct the action using a N=4 twisted superconnection formalism.

  1. Steric, Quantum, and Electrostatic Effects on S{sub N}2 Reaction Barriers in Gas Phase

    SciTech Connect (OSTI)

    Liu, Shubin; Hu, Hao; Pedersen, Lee G.

    2010-05-13T23:59:59.000Z

    Biomolecular nucleophilic substitution reactions, S{sub N}2, are fundamental and commonplace in chemistry. It is the well-documented experimental finding in the literature that vicinal substitution with bulkier groups near the reaction center significantly slows the reaction due to steric hindrance, but theoretical understanding in the quantitative manner about factors dictating the S{sub N}2 reaction barrier height is still controversial. In this work, employing the new quantification approach that we recently proposed for the steric effect from the density functional theory framework, we investigate the relative contribution of three independent effects—steric, electrostatic, and quantum—to the S{sub N}2 barrier heights in gas phase for substituted methyl halide systems, R{sub 1}R{sub 2}R{sub 3}CX, reacting with the fluorine anion, where R{sub 1}, R{sub 2}, and R{sub 3} denote substituting groups and X = F or Cl. We found that in accordance with the experimental finding, for these systems, the steric effect dominates the transition state barrier, contributing positively to barrier heights, but this contribution is largely compensated by the negative, stabilizing contribution from the quantum effect due to the exchange-correlation interactions. Moreover, we find that it is the component from the electrostatic effect that is linearly correlated with the S{sub N}2 barrier height for the systems investigated in the present study. In addition, we compared our approach with the conventional method of energy decomposition in density functional theory as well as examined the steric effect from the wave function theory for these systems via natural bond orbital analysis.

  2. Geometric Engineering, Mirror Symmetry and 6d (1,0) -> 4d, N=2

    E-Print Network [OSTI]

    Del Zotto, Michele; Xie, Dan

    2015-01-01T23:59:59.000Z

    We study compactification of 6 dimensional (1,0) theories on T^2. We use geometric engineering of these theories via F-theory and employ mirror symmetry technology to solve for the effective 4d N=2 geometry for a large number of the (1,0) theories including those associated with conformal matter. Using this we show that for a given 6d theory we can obtain many inequivalent 4d N=2 SCFTs. Some of these respect the global symmetries of the 6d theory while others exhibit SL(2,Z) duality symmetry inherited from global diffeomorphisms of the T^2. This construction also explains the 6d origin of moduli space of 4d affine ADE quiver theories as flat ADE connections on T^2. Among the resulting 4d N=2 CFTs we find theories whose vacuum geometry is captured by an LG theory (as opposed to a curve or a local CY geometry). We obtain arbitrary genus curves of class S with punctures from toroidal compactification of (1,0) SCFT's where the curve of the class S theory emerges through mirror symmetry. We also show that toroidal...

  3. Geometric Engineering, Mirror Symmetry and 6d (1,0) -> 4d, N=2

    E-Print Network [OSTI]

    Michele Del Zotto; Cumrun Vafa; Dan Xie

    2015-04-30T23:59:59.000Z

    We study compactification of 6 dimensional (1,0) theories on T^2. We use geometric engineering of these theories via F-theory and employ mirror symmetry technology to solve for the effective 4d N=2 geometry for a large number of the (1,0) theories including those associated with conformal matter. Using this we show that for a given 6d theory we can obtain many inequivalent 4d N=2 SCFTs. Some of these respect the global symmetries of the 6d theory while others exhibit SL(2,Z) duality symmetry inherited from global diffeomorphisms of the T^2. This construction also explains the 6d origin of moduli space of 4d affine ADE quiver theories as flat ADE connections on T^2. Among the resulting 4d N=2 CFTs we find theories whose vacuum geometry is captured by an LG theory (as opposed to a curve or a local CY geometry). We obtain arbitrary genus curves of class S with punctures from toroidal compactification of (1,0) SCFT's where the curve of the class S theory emerges through mirror symmetry. We also show that toroidal compactification of the little string version of these theories can lead to class S theories with no punctures on arbitrary genus Riemann surface.

  4. Geometric Engineering, Mirror Symmetry and 6d (1,0) -> 4d, N=2

    E-Print Network [OSTI]

    Michele Del Zotto; Cumrun Vafa; Dan Xie

    2015-05-31T23:59:59.000Z

    We study compactification of 6 dimensional (1,0) theories on T^2. We use geometric engineering of these theories via F-theory and employ mirror symmetry technology to solve for the effective 4d N=2 geometry for a large number of the (1,0) theories including those associated with conformal matter. Using this we show that for a given 6d theory we can obtain many inequivalent 4d N=2 SCFTs. Some of these respect the global symmetries of the 6d theory while others exhibit SL(2,Z) duality symmetry inherited from global diffeomorphisms of the T^2. This construction also explains the 6d origin of moduli space of 4d affine ADE quiver theories as flat ADE connections on T^2. Among the resulting 4d N=2 CFTs we find theories whose vacuum geometry is captured by an LG theory (as opposed to a curve or a local CY geometry). We obtain arbitrary genus curves of class S with punctures from toroidal compactification of (1,0) SCFTs where the curve of the class S theory emerges through mirror symmetry. We also show that toroidal compactification of the little string version of these theories can lead to class S theories with no punctures on arbitrary genus Riemann surface.

  5. Integrable N = 2 Landau-Ginzburg Theories from Quotients of Fusion Rings

    E-Print Network [OSTI]

    Eli J. Mlawer; Harold A. Riggs; Howard J. Schnitzer

    1993-10-14T23:59:59.000Z

    The discovery of integrable $N=2$ supersymmetric Landau-Ginzburg theories whose chiral rings are fusion rings suggests a close connection between fusion rings, the related Landau-Ginzburg superpotentials, and $N=2$ quantum integrability. We examine this connection by finding the natural $SO(N)_K$ analogue of the construction that produced the superpotentials with $Sp(N)_K$ and $SU(N)_K$ fusion rings as chiral rings. The chiral rings of the new superpotentials are not directly the fusion rings of any conformal field theory, although they are natural quotients of the tensor subring of the $SO(N)_K$ fusion ring. The new superpotentials yield solvable (twisted $N=2$) topological field theories. We obtain the integer-valued correlation functions as sums of $SO(N)_K$ Verlinde dimensions by expressing the correlators as fusion residues. The $SO(2n+1)_{2k+1}$ and $SO(2k+1)_{2n+1}$ related topological Landau-Ginzburg theories are isomorphic, despite being defined via quite different superpotentials.

  6. Indirect ultraviolet photodesorption from CO:N2 binary ices - an efficient grain-gas process

    E-Print Network [OSTI]

    Bertin, Mathieu; Romanzin, Claire; Poderoso, Hugo A M; Michaut, Xavier; Philippe, Laurent; Jeseck, Pascal; Öberg, Karin I; Linnartz, Harold; Fillion, Jean-Hugues

    2013-01-01T23:59:59.000Z

    UV ice photodesorption is an important non-thermal desorption pathway in many interstellar environments that has been invoked to explain observations of cold molecules in disks, clouds and cloud cores. Systematic laboratory studies of the photodesorption rates, between 7 and 14 eV, from CO:N2 binary ices, have been performed at the DESIRS vacuum UV beamline of the synchrotron facility SOLEIL. The photodesorption spectral analysis demonstrates that the photodesorption process is indirect, i.e. the desorption is induced by a photon absorption in sub-surface molecular layers, while only surface molecules are actually desorbing. The photodesorption spectra of CO and N2 in binary ices therefore depend on the absorption spectra of the dominant species in the subsurface ice layer, which implies that the photodesorption efficiency and energy dependence are dramatically different for mixed and layered ices compared to pure ices. In particular, a thin (1-2 ML) N2 ice layer on top of CO will effectively quench CO photod...

  7. Modelling Glass Parisons R.M.M. Mattheij, K. Wang & H.G. ter Morsche

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    Modelling Glass Parisons R.M.M. Mattheij, K. Wang & H.G. ter Morsche EMail: mattheij@win.tue.nl Abstract In order to design better glass products, numerical modelling is essential. In this paper we focus, more specifically, on pressing forms, so called parison, appearing in the produc­ tion of packing glass

  8. 6035 Hg(Ar) Lamp in 6058 Fiber Optic Accessory. Pencil Style Calibration Lamps

    E-Print Network [OSTI]

    Woodall, Jerry M.

    to that of the Hg(Ar) Lamp, which is the characteristic mercury line spectrum. Forced air-cooling (i.e. from of the handle for connection to the power supply. Table 1 Usable Wavelengths of Spectral Calibration Lamps (in.2 1079.8 1084.5 1114.3 Power Supplies; AC versus DC We offer different power supplies for different needs

  9. Temperature variations in an SF6-N2 mixture arc plasma A. Gleizes, M. Razafinimanana and S. Vacqui

    E-Print Network [OSTI]

    Boyer, Edmond

    1411 Temperature variations in an SF6-N2 mixture arc plasma A. Gleizes, M. Razafinimanana and S brûlant dans les mélanges SF6-N2, en fonction de l'intensité du courant. Suivant la proportion de SF6 dans courant supérieur à 50 A, les valeurs de To dans un mélange contenant 20 % de SF6 sont inférieures à

  10. V2O5 xerogel electrodes with much enhanced lithium-ion intercalation properties with N2 annealing

    E-Print Network [OSTI]

    Cao, Guozhong

    V2O5 xerogel electrodes with much enhanced lithium-ion intercalation properties with N2 annealing annealed V2O5 film. Lithium ion intercalation measurements showed that at a charge/discharge current density of 600 mAgÀ1 , the N2 annealed sample possessed noticeably better lithium ion storage capability

  11. Nitrous Oxide Nitrous oxide (chemical formula N2O), is a trace gas in Earth's atmosphere, with a

    E-Print Network [OSTI]

    fuel, biomass and biofuel, and industrial processes. Nitrous oxide emissions related to biofuel, the Global Warming Potential (GWP) is a more useful quantity. The GWP of N2O is the time- integrated radiative forcing following a 1 kg pulse emission of N2O, relative to the same quantity following a 1 kg

  12. Low-Temperature Desorption of N2O from NO on Rutile TiO2(110...

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

    Desorption of N2O from NO on Rutile TiO2(110)-1x1. Low-Temperature Desorption of N2O from NO on Rutile TiO2(110)-1x1. Abstract: We find that NO dosed on rutile TiO2(110)-1×1...

  13. ORIGINAL PAPER Short-term effect of tillage intensity on N2O and CO2 emissions

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ORIGINAL PAPER Short-term effect of tillage intensity on N2O and CO2 emissions Pascal Boeckx negative to positive. We studied the short-term effect of tillage intensity on N2O and CO2 emissions. We site, an intermediately aerated Luvisol in Belgium, were similar. Nitrous oxide and CO2 emissions were

  14. Sulfur Impregnation on Activated Carbon Fibers through H2S Oxidation for Vapor Phase

    E-Print Network [OSTI]

    Borguet, Eric

    surface in a fixed-bed reactor. By changing the temperature and duration of the sulfur impregnation mercury adsorption experiments were carried out in a fixed-bed reactor. Sulfur was impregnated mainly a fixed-bed adsorber at room temperature decreased with an increase in sulfur content. Such behavior

  15. Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

    E-Print Network [OSTI]

    Zheng, L.

    2011-01-01T23:59:59.000Z

    Germann, 1969. Physical properties of hydrogen sulfide waterequilibrium properties of system carbon dioxide-hydrogenA thermodynamic property model for fluid phase hydrogen

  16. Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

    E-Print Network [OSTI]

    Zheng, L.

    2011-01-01T23:59:59.000Z

    Journal of Chemical and Engineering Data, 22(4): 399-401.Journal of Chemical and Engineering data, 11(1): 13-16.dioxide. Journal of Chemical and Engineering Data, 25(3):

  17. Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

    E-Print Network [OSTI]

    Zheng, L.

    2011-01-01T23:59:59.000Z

    PAHs), and (4) its high partition coefficient between SCC and water.in production waters RøeUtvik (1999) BTEX PAHs Phenols TablePAHs and phenols concentration (mg/L) in production waters

  18. Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

    E-Print Network [OSTI]

    Zheng, L.

    2011-01-01T23:59:59.000Z

    potential effects of carbon capture and geologic storage (CCS)CCS and groundwater resources (Birkholzer et al. , 2008), we evaluated the potentialCCS operations. Therefore, TMVOC_REACT was used to assess the potential

  19. Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

    E-Print Network [OSTI]

    Zheng, L.

    2011-01-01T23:59:59.000Z

    reservoir to shallower formations, for example through fault or fracture zones, or poorly plugged abandoned

  20. Influence of pp ions on pion absorption in H2 S. Jonsell,1

    E-Print Network [OSTI]

    energies before the moment of pion absorption by the proton, with significant impact on the interpretation pp state, giving, respectively, a discrete or a continuous distribution of kinetic energies questions of interest for the new generation of experiments determining the strong-force shift and width

  1. Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

    E-Print Network [OSTI]

    Zheng, L.

    2011-01-01T23:59:59.000Z

    Gu and Evans, 2007) (Bradbury and Baeyens, 2005) Sme s _OPb + Sme w _OPb + Sme s _OPb + + H + = Sme s _OH + Pb +2 Sme w _OPb + +

  2. Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

    SciTech Connect (OSTI)

    Zheng, L.; Spycher, N.; Xu, T.; Apps, J.; Kharaka, Y.; Birkholzer, J.T.

    2010-11-05T23:59:59.000Z

    In this study, reactive transport simulations were used to assess the mobilization and transport of organics with supercritical CO{sub 2} (SCC), and the co-injection and transport of H{sub 2}S with SCC. These processes were evaluated at conditions of typical storage reservoirs, and for cases of hypothetical leakage from a reservoir to an overlying shallower fresh water aquifer. Modeling capabilities were developed to allow the simulation of multiphase flow and transport of H{sub 2}O, CO{sub 2}, H{sub 2}S, as well as specific organic compounds (benzene), coupled with multicomponent geochemical reaction and transport. This included the development of a new simulator, TMVOC-REACT, starting from existing modules of the TOUGH2 family of codes. This work also included an extensive literature review, calculation, and testing of phase-partitioning properties for mixtures of the phases considered. The reactive transport simulations presented in this report are primarily intended to illustrate the capabilities of the new simulator. They are also intended to help evaluate and understand various processes at play, in a more qualitative than quantitative manner, and only for hypothetical scenarios. Therefore, model results are not intended as realistic assessments of groundwater quality changes for specific locations, and they certainly do not provide an exhaustive evaluation of all possible site conditions, especially given the large variability and uncertainty in hydrogeologic and geochemical parameter input into simulations. The first step in evaluating the potential mobilization and transport of organics was the identification of compounds likely to be present in deep storage formations, and likely to negatively impact freshwater aquifers if mobilized by SCC. On the basis of a literature review related to the occurrence of these organic compounds, their solubility in water and SCC, and their toxicity (as reflected by their maximum contaminant levels MCL), benzene was selected as a key compound for inclusion into numerical simulations. Note that considering additional organic compounds and/or mixtures of such compounds in the simulations was beyond the scope of this study, because of the effort required to research, calculate, and validate the phase-partitioning data necessary for simulations. The injection of CO{sub 2} into a deep saline aquifer was simulated, followed by modeling the leaching of benzene by SCC and transport of benzene to an overlying aquifer along a hypothetical leakage pathway. One- and two-dimensional models were set up for this purpose. The target storage formation was assumed to initially contain about 10{sup -4} ppm benzene. Model results indicate that: (1) SCC efficiently extracts benzene from the storage formation. (2) Assuming equilibrium, the content of benzene in SCC is roportional to the concentration of benzene in the aqueous and solid phases. (3) Benzene may co-migrate with CO{sub 2} into overlying aquifers if a leakage pathway is present. Because the aqueous solubility of benzene in contact with CO{sub 2} is lower than the aqueous solubility of CO{sub 2}, benzene is actually enriched in the CO{sub 2} phase as the plume advances. (4) For the case studied here, the resulting aqueous benzene concentration in the overlying aquifer is on the same order of magnitude as the initial concentration in the storage formation. This generic modeling study illustrates, in a semi-quantitative manner, the possible mobilization of benzene by SCC. The extent to which the mobilization of this organic compound evolves temporally and spatially depends on a large number of controlling parameters and is largely site specific. Therefore, for more 'truly' predictive work, further sensitivity studies should be conducted, and further modeling should be integrated with site-specific laboratory and/or field experimental data. The co-injection of H{sub 2}S with CO{sub 2} into a deep saline aquifer was also simulated. In addition, the model considered leakage of the supercritical CO{sub 2}+H{sub 2}S mixture along a preferential p

  3. Kinetics of Direct Oxidation of H2S in Coal Gas to Elemental Sulfur

    SciTech Connect (OSTI)

    K.C. Kwon

    2005-11-01T23:59:59.000Z

    Removal of hydrogen sulfide (H{sub 2}S) from coal gasifier gas and sulfur recovery are key steps in the development of Department of Energy's (DOE's) advanced Vision 21 plants that produce electric power and clean transportation fuels with coal and natural gas. These Vision 21 plants will require highly clean coal gas with H{sub 2}S below 1 ppm and negligible amounts of trace contaminants such as hydrogen chloride, ammonia, alkali, heavy metals, and particulate. The conventional method of sulfur removal and recovery employing amine, Claus, and tail-gas treatment is very expensive. A second generation approach developed under DOE's sponsorship employs hot-gas desulfurization (HGD) using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process (DSRP). However, this process sequence does not remove trace contaminants and is targeted primarily towards the development of advanced integrated gasification combined cycle (IGCC) plants that produce electricity (not both electricity and transportation fuels). There is an immediate as well as long-term need for the development of cleanup processes that produce highly clean coal gas for next generation Vision 21 plants. To this end, a novel process is now under development at several research organizations in which the H{sub 2}S in coal gas is directly oxidized to elemental sulfur over a selective catalyst. Such a process is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. The direct oxidation of H{sub 2}S to elemental sulfur in the presence of SO{sub 2} is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H{sub 2}S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and HGD/DSRP. The objectives of this research are to measure kinetics of direct oxidation of H{sub 2}S to elemental sulfur in the presence of a simulated coal gas mixture containing SO{sub 2}, H{sub 2}, and moisture, using 160-{micro}m C-500-04 alumina catalyst particles and 400 square cells/inch{sup 2}, {gamma}-Al{sub 2}O{sub 3}-wash-coated monolithic catalyst, and various reactors such as a micro packed-bed reactor, a micro bubble reactor, and a monolithic catalyst reactor, and to develop kinetic rate equations and model the direct oxidation process to assist in the design of large-scale plants. This heterogeneous catalytic reaction has gaseous reactants such as H{sub 2}S and SO{sub 2}. However, this heterogeneous catalytic reaction has heterogeneous products such as liquid elemental sulfur and steam.

  4. Sensitive Detection of H2S Using Gold Nanoparticle Decorated Single-Walled Carbon

    E-Print Network [OSTI]

    , and increasing the bias voltage reduced the sensor recovery time, probably by local Joule heating. The sensing in large amounts in coal and natural gas processing, petroleum industries, biogas production, and sewage

  5. Development of analytical techniques to study H2s poisoning of PEMFCs and components

    SciTech Connect (OSTI)

    Brosha, Eric L [Los Alamos National Laboratory; Rockward, Tommy [Los Alamos National Laboratory; Uribe, Francisco A [Los Alamos National Laboratory; Garzon, Fernando H [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Polymer electrolyte membrane fuel cells are sensitive to impurities that may be present in either the oxidizer or fuel. H{sub 2}S, even at the ppb level, will have a dramatic and adverse affect on fuel cell performance. Not only is it important to know a particular material's affinity to adsorb H{sub 2}S, when considering materials for PEMFC applications, issues such as permeation and crossover rates also become extremely important Several experimental methods have been developed to quantify H{sub 2}S adsorption onto surfaces and to quantify H{sub 2}S permeation through Nafion(reg.) membranes using readily available and inexpensive Ag/AgS ion probes. In addition to calculating the H{sub 2}S uptake on commonly used XC-72 carbon supports and PtlXC-72 catalysts, the H{sub 2}S permeability through dry and humidified Nafion(reg.) PEMFC membranes was also studied using these specialized techniques. In each ion probe experiment performed, a sulfide anti-oxidant buffer solution was used to trap and concentrate trace quantities of H{sub 2}S during the course of the measurement. Crossover experiments were conducted for up to 24 hours in order to achieve sulfide ion concentrations high enough to be precisely determined by subsequent titration with Pb(NO{sub 3}){sub 2}. By using these techniques, we have confirmed H{sub 2}S crossover in Nafion(reg.) membranes and have calculated preliminary rates of H{sub 2}S crossover.

  6. Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

    E-Print Network [OSTI]

    Zheng, L.

    2011-01-01T23:59:59.000Z

    synthetic aluminous goethite before and after transformationAdsorption of lead(ll) on the goethite surface: voltammetric5.35.   Profile of the goethite volume fraction change (

  7. H-2(p,n)2p Spin Transfer from 305 to 788 Mev

    E-Print Network [OSTI]

    McNaughton, M. W.; Koch, K.; Supek, I.; Tanaka, N.; Ambrose, DA; Coffey, P.; Johnston, K.; McNaughton, K. H.; Riley, P. J.; Glass, G.; Hiebert, John C.; Northcliffe, L. C.; Simon, A. J.; Mercer, D. J.; Adams, D. L.; Spinka, H.; Jeppersen, R. H.; Tripard, G. E.; Woolverton, H.

    1992-01-01T23:59:59.000Z

    PHYSICAL REVIEW C VOLUME 45, NUMBER 6 JUNE 1992 ARTICLES 2H(y, n)2p spin transfer from $05 to 7'88 Mev M. W. McNaughton, K. Koch, ' I. Supek, and N. Tanakat Los Alamos National Laboratory, Ios Alarnos, ?wMexico 876/6 D. A. Ambrose, P. Coff..., Colorado 80808 D. L. Adams Rice University, Bou,ston, Texas 77252 H. Spinka Argonne National Laboratory, Argonne, Illinois 60/89 R. H. Jeppesen University of Montana, Missoula, Montana 69812 G. E. Tripard Washington State University, Pullman...

  8. The free energy of N=2 supersymmetric AdS_4 solutions of M-theory

    E-Print Network [OSTI]

    Maxime Gabella; Dario Martelli; Achilleas Passias; James Sparks

    2011-07-29T23:59:59.000Z

    We show that general N=2 supersymmetric AdS_4 solutions of M-theory with non-zero M2-brane charge admit a canonical contact structure. The free energy of the dual superconformal field theory on S^3 and the scaling dimensions of operators dual to supersymmetric wrapped M5-branes are expressed via AdS/CFT in terms of contact volumes. In particular, this leads to topological and localization formulae for the coefficient of N^{3/2} in the free energy of such solutions.

  9. Angular Momentum and Gravimagnetization of the ${\\cal N}=2$ SYM vacuum

    E-Print Network [OSTI]

    A. Gorsky

    2011-02-09T23:59:59.000Z

    In this note we discuss the gravimagnetization of the ${\\cal N}=2$ SYM vacuum in the $\\Omega$-background. It is argued that the Seiberg-Witten prepotential is related to the vacuum density of the angular momentum in the Euclidean $R^4$ space. The possible role of the dyonic instantons as the microscopic angular momentum carriers which could yield the spontaneous vacuum gravimagnetization is conjectured. We interpret the dyonic instanton as a kind of the Euclidean bounce in $R^4$ similar to one responsible for the Schwinger pair creation. The induced angular momentum in $R^4$ is also briefly considered in the dual Liouville formulation of $SU(2)$ theory via AGT relation.

  10. Three very young HgMn stars in the Orion OB1 Association

    E-Print Network [OSTI]

    Vincent M. Woolf; David L. Lambert

    1999-05-18T23:59:59.000Z

    We report the detection of three mercury-manganese stars in the Orion OB1 association. HD 37886 and BD-0 984 are in the approximately 1.7 million year old Orion OB1b. HD 37492 is in the approximately 4.6 million year old Orion OB1c. Orion OB1b is now the youngest cluster with known HgMn star members. This places an observational upper limit on the time scale needed to produce the chemical peculiarities seen in mercury-manganese stars, which should help in the search for the cause or causes of the peculiar abundances in HgMn and other chemically peculiar upper main sequence stars.

  11. Axi-symmetrical flow reactor for .sup.196 Hg photochemical enrichment

    DOE Patents [OSTI]

    Grossman, Mark W. (Belmont, MA)

    1991-01-01T23:59:59.000Z

    The present invention is directed to an improved photochemical reactor useful for the isotopic enrichment of a predetermined isotope of mercury, especially, .sup.196 Hg. Specifically, two axi-symmetrical flow reactors were constructed according to the teachings of the present invention. These reactors improve the mixing of the reactants during the photochemical enrichment process, affording higher yields of the desired .sup.196 Hg product. Measurements of the variation of yield (Y) and enrichment factor (E) along the flow axis of these reactors indicates very substantial improvement in process uniformity compared to previously used photochemical reactor systems. In one preferred embodiment of the present invention, the photoreactor system was built such that the reactor chamber was removable from the system without disturbing the location of either the photochemical lamp or the filter employed therewith.

  12. Axi-symmetrical flow reactor for [sup 196]Hg photochemical enrichment

    DOE Patents [OSTI]

    Grossman, M.W.

    1991-04-30T23:59:59.000Z

    The present invention is directed to an improved photochemical reactor useful for the isotopic enrichment of a predetermined isotope of mercury, especially, [sup 196]Hg. Specifically, two axi-symmetrical flow reactors were constructed according to the teachings of the present invention. These reactors improve the mixing of the reactants during the photochemical enrichment process, affording higher yields of the desired [sup 196]Hg product. Measurements of the variation of yield (Y) and enrichment factor (E) along the flow axis of these reactors indicates very substantial improvement in process uniformity compared to previously used photochemical reactor systems. In one preferred embodiment of the present invention, the photoreactor system was built such that the reactor chamber was removable from the system without disturbing the location of either the photochemical lamp or the filter employed therewith. 10 figures.

  13. Scattering amplitudes in N=2 Maxwell-Einstein and Yang-Mills/Einstein supergravity

    E-Print Network [OSTI]

    Marco Chiodaroli; Murat Gunaydin; Henrik Johansson; Radu Roiban

    2015-02-03T23:59:59.000Z

    We expose a double-copy structure in the scattering amplitudes of the generic Jordan family of N=2 Maxwell-Einstein and Yang-Mills/Einstein supergravity theories in four and five dimensions. The Maxwell-Einstein supergravity amplitudes are obtained through the color/kinematics duality as a product of two gauge-theory factors; one originating from pure N=2 super-Yang-Mills theory and the other from the dimensional reduction of a bosonic higher-dimensional pure Yang-Mills theory. We identify a specific symplectic frame in four dimensions for which the on-shell fields and amplitudes from the double-copy construction can be identified with the ones obtained from the supergravity Lagrangian and Feynman-rule computations. The Yang-Mills/Einstein supergravity theories are obtained by gauging a compact subgroup of the isometry group of their Maxwell-Einstein counterparts. For the generic Jordan family this process is identified with the introduction of cubic scalar couplings on the bosonic gauge-theory side, which through the double copy are responsible for the non-abelian vector interactions in the supergravity theory. As a demonstration of the power of this structure, we present explicit computations at tree-level and one loop. The double-copy construction allows us to obtain compact expressions for the supergravity superamplitudes which are naturally organized as polynomials in the gauge coupling constant.

  14. The N2K Consortium. IV. New temperatures and metallicities for 100,000+ FGK dwarfs

    E-Print Network [OSTI]

    S. Mark Ammons; Sarah E. Robinson; Jay Strader; Gregory Laughlin; Debra Fischer; Aaron Wolf

    2005-10-07T23:59:59.000Z

    We have created a framework to facilitate the construction of specialized target lists for radial velocity surveys that are biased toward stars that (1) possess planets and (2) are easiest to observe with current detection techniques. We use a procedure that uniformly estimates fundamental stellar properties of Tycho 2 stars, with errors, using spline functions of broadband photometry and proper motion found in Hipparcos/Tycho 2 and 2MASS. We provide estimates of temperature and distance for 2.4 million Tycho 2 stars that lack trigonometric distances. For stars that appear to be FGK dwarfs according to estimated temperature and absolute magnitude, we also derive [Fe/H] and identify unresolved binary systems with mass ratios between 1.25 and 3. Our spline function models are trained on the unique Valenti & Fischer (2005) set, composed of 1000 dwarfs with precise stellar parameters estimated from HIRES spectroscopy. For FGK dwarfs with V photometric error less than 0.05 magnitudes, or V 0.2). Our metallicity estimates have been used to identify targets for N2K (Fischer et al. 2005), a large-scale radial velocity search for Hot Jupiters, which has published the detection of 4 Hot Jupiters with one transit. The broadband filtering outlined here is the first screening tier for N2K; the second tier is a low-resolution spectroscopy program headed by S.E. Robinson (astro-ph/0510150).

  15. Comparison of Self-Consistent Skyrme and Gogny Calculations for Light Hg Isotopes

    E-Print Network [OSTI]

    M. Warda; A. Staszczak; L. Próchniak

    2011-07-05T23:59:59.000Z

    The ground-state properties of neutron-deficient Hg isotopes have been investigated by the constrained self-consistent Hartree-Fock-Bogoliubov approach with the Skyrme and Gogny effective forces. In the case of the Skyrme interaction we h ave also applied the Hartree-Fock+BCS model with the state-dependent $\\delta$-pairing interaction. Potential energy surfaces and pairing properties have been compared for the both types of forces.

  16. Automated product recovery in a Hg-196 photochemical isotope separation process

    DOE Patents [OSTI]

    Grossman, M.W.; Speer, R.

    1992-07-21T23:59:59.000Z

    A method of removing deposited product from a photochemical reactor used in the enrichment of [sup 196]Hg has been developed and shown to be effective for rapid re-cycling of the reactor system. Unlike previous methods relatively low temperatures are used in a gas and vapor phase process of removal. Importantly, the recovery process is understood in a quantitative manner so that scaling design to larger capacity systems can be easily carried out. 2 figs.

  17. Automated product recovery in a HG-196 photochemical isotope separation process

    DOE Patents [OSTI]

    Grossman, Mark W. (Belmont, MA); Speer, Richard (Reading, MA)

    1992-01-01T23:59:59.000Z

    A method of removing deposited product from a photochemical reactor used in the enrichment of .sup.196 Hg has been developed and shown to be effective for rapid re-cycling of the reactor system. Unlike previous methods relatively low temperatures are used in a gas and vapor phase process of removal. Importantly, the recovery process is understood in a quantitative manner so that scaling design to larger capacity systems can be easily carried out.

  18. Determination of Zn, Pb, Cu, and Hg in soils of Ekpan, Nigeria

    SciTech Connect (OSTI)

    Omgbu, J.A.; Kokogho, M.A. (College of Education, Warri (Nigeria))

    1993-01-01T23:59:59.000Z

    The concentrations of zinc, lead, copper, and mercury in solids in Ekpan were determined in order to assess the impact of petroleum-refining activities. Twenty soil samples were collected 100 m apart (10 topsoils 0 to 15 cm and 10 bottom soils 15 to 30 cm). Sample solutions prepared were analyzed using the atomic absorption spectrophotometry technique. Results show that top-soil samples contain as much as 7.13 to 13.10 [mu]g/g Zn, 55.13 to 65.50 [mu]g/g Pb, 3.47 to 5.27 [mu]g/g Cu, and 4.00 to 6.50 [mu]g.g Hg. Bottom soil samples contain as much as 7.17 to 13.77 [mu]g/g Zn, 54.97 to 63.23 [mu]g/g Pb, 3.57 to 6.50 [mu]/g Cu, and 4.57 to 6.63 [mu]g/g Hg. The levels reported had an abundance ratio in the order Pb > Zn > Hg > Cu in the soil samples. It is recommended that appropriate measures be put in place by the companies to treat waste effluent before discharging them to the immediate environment. 8 refs., 2 tabs.

  19. Homogeneous and Heterogeneous Reaction and Transformation of Hg and Trace Metals in Combustion Systems

    SciTech Connect (OSTI)

    J. Helble; Clara Smith; David Miller

    2009-08-31T23:59:59.000Z

    The overall goal of this project was to produce a working dynamic model to predict the transformation and partitioning of trace metals resulting from combustion of a broad range of fuels. The information provided from this model will be instrumental in efforts to identify fuels and conditions that can be varied to reduce metal emissions. Through the course of this project, it was determined that mercury (Hg) and arsenic (As) would be the focus of the experimental investigation. Experiments were therefore conducted to examine homogeneous and heterogeneous mercury oxidation pathways, and to assess potential interactions between arsenic and calcium. As described in this report, results indicated that the role of SO{sub 2} on Hg oxidation was complex and depended upon overall gas phase chemistry, that iron oxide (hematite) particles contributed directly to heterogeneous Hg oxidation, and that As-Ca interactions occurred through both gas-solid and within-char reaction pathways. Modeling based on this study indicated that, depending upon coal type and fly ash particle size, vaporization-condensation, vaporization-surface reaction, and As-CaO in-char reaction all play a role in arsenic transformations under combustion conditions.

  20. Receptor Specificity and Transmission of H2N2 Subtype Viruses Isolated from the Pandemic of 1957

    E-Print Network [OSTI]

    Pappas, Claudia

    Influenza viruses of the H2N2 subtype have not circulated among humans in over 40 years. The occasional isolation of avian H2 strains from swine and avian species coupled with waning population immunity to H2 hemagglutinin ...

  1. Thermal Stability of MOCVD and HVPE GaN Layers in H2, HCl, NH3 and N2

    E-Print Network [OSTI]

    Anderson, Timothy J.

    GaN, and the black is the sapphire substrate. At 900 C nearly 1/4 of the film has sublimated leavingThermal Stability of MOCVD and HVPE GaN Layers in H2, HCl, NH3 and N2 M. A. Mastro1 ) (a), O. M.60.Dv; 81.15.Gh; S7.14 This work represents a complete study of GaN annealed in H2, HCl, NH3 and N2

  2. High-pressure dissociation of silver mercury iodide, Ag{sub 2}HgI{sub 4}

    SciTech Connect (OSTI)

    Parfitt, D.C. [Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU (United Kingdom); Hull, S. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom)]. E-mail: s.hull@rl.ac.uk; Keen, D.A. [Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU (United Kingdom); ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); Crichton, W. [ESRF, 6 Rue Jules Horowitz, BP 220, 38043 Grenoble CEDEX 9 (France)

    2004-10-01T23:59:59.000Z

    High-pressure X-ray diffraction has been used to probe the behavior of the superionic conductor silver mercury iodide (Ag{sub 2}HgI{sub 4}) at pressures up to 5GPa and at temperatures from 295 to 370K. Significant changes in the diffraction spectra, indicative of structural transitions, are observed around 0.7 and 1.3GPa across the range of temperatures studied. The change at 0.7GPa is shown to correspond to the dissociation of silver mercury iodide into silver iodide and mercury iodide, i.e., Ag{sub 2}HgI{sub 4}->2AgI+HgI{sub 2}. The second transition, at 1.3GPa, is due to a structural phase transition within HgI{sub 2}. Rietveld analysis of the diffraction data is used to confirm and refine all the known crystal structures.

  3. Total and organic Hg concentrations in cephalopods from the North Eastern Atlantic waters: influence of geographical origin and feeding

    E-Print Network [OSTI]

    Boyer, Edmond

    %). With the exception of oceanic squids, the digestive gland globally displayed higher T-Hg concentrations than its toxicity as a result of its enhanced penetration through lipid membranes (Boudou et al. 1983

  4. Biokinetics of Hg and Pb accumulation in the encapsulated egg of the1 common cuttlefish Sepia officinalis: radiotracer experiments2

    E-Print Network [OSTI]

    Boyer, Edmond

    with the32 eggshell indicating that the latter acted as an efficient shield against metal penetration. From the Ocean (Cossa et al., 2002). Hg and Pb are also discharged in coastal waters due to the50 contaminated

  5. Phases of underpotentially deposited Hg on Au(111): An in situ surface X-ray diffraction study

    SciTech Connect (OSTI)

    Li, J.; Abruna, H.D. [Cornell Univ., Ithaca, NY (United States)] [Cornell Univ., Ithaca, NY (United States)

    1997-04-10T23:59:59.000Z

    We report on an in situ surface X-ray diffraction study of the underpotential deposition (UPD) of mercury on Au(111). We have observed three UPD phases present at potentials prior to bulk mercury deposition. These phases consist of two well-ordered intermediate states and what appears to be either a fully discharged two-dimensional liquid Hg layer or a monolayer of an amorphous Hg-Au alloy. Both ordered intermediate phases have hexagonal structures with lattice vectors that are rotated 30{degree} from those of the Au(111) substrate. The first phase (phase I), present at a potential of +0.68 V, was only observed on fresh flame-annealed Au(111) electrodes and appears to be an open incommensurate structure with a lattice constant of 3.86 {+-} 0.03 A. This phase appears to be metastable since it changes to a second ordered phase (phase II) after a certain time. The second phase has a more compact lattice with a = 3.34 {+-} 0.01 A and appears to be a commensurate 2x2 structure with 2/3 of the Hg atoms at threefold hollow sites and 1/3 on atop sites. Similar to the first one, this phase is also metastable and can be transformed to a final, fully discharged, state of a two-dimensional liquid Hg layer or an amorphous Hg-Au alloy. The entire Hg UPD process, from Hg{sup 2+} to the fully discharged metallic Hg layer, agrees well with a multistep mechanism based on previous electrochemical kinetic studies on polycrystalline Au electrodes. 31 refs., 10 figs., 2 tabs.

  6. Drag and jet quenching of heavy quarks in a strongly coupled N=2* plasma

    E-Print Network [OSTI]

    Carlos Hoyos-Badajoz

    2009-09-14T23:59:59.000Z

    The drag of a heavy quark and the jet quenching parameter are studied in the strongly coupled N=2* plasma using the AdS/CFT correspondence. Both increase in units of the spatial string tension as the theory departs from conformal invariance. The description of heavy quark dynamics using a Langevin equation is also considered. It is found that the difference between the velocity dependent factors of the transverse and longitudinal momentum broadening of the quark admit an interpretation in terms of relativistic effects, so the distribution is spherical in the quark rest frame. When conformal invariance is broken there is a broadening of the longitudinal momentum distribution. This effect may be useful in understanding the jet distribution observed in experiments.

  7. Real Clifford Algebra Cl{sub n,0}, n = 2, 3(mod 4) Wavelet Transform

    SciTech Connect (OSTI)

    Hitzer, Eckhard [Department of Applied Physics, University of Fukui, 910-8507 (Japan)

    2009-09-09T23:59:59.000Z

    We show how for n = 2, 3(mod 4) continuous Clifford (geometric) algebra (GA)Cl{sub n}-valued admissible wavelets can be constructed using the similitude group SIM(n). We strictly aim for real geometric interpretation, and replace the imaginary unit i is an element of C therefore with a GA blade squaring to -1. Consequences due to non-commutativity arise. We express the admissibility condition in terms of a Cl{sub n} Clifford Fourier Transform and then derive a set of important properties such as dilation, translation and rotation covariance, a reproducing kernel, and show how to invert the Clifford wavelet transform. As an example, we introduce Clifford Gabor wavelets. We further invent a generalized Clifford wavelet uncertainty principle.

  8. Ultrasensitive detection of Hg{sup 2+} using oligonucleotide-functionalized AlGaN/GaN high electron mobility transistor

    SciTech Connect (OSTI)

    Cheng, Junjie [Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031 (China); Division of Nanobiomedicine, Key Laboratory for Nano-Bio Interface Research, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123 (China); Li, Jiadong; Miao, Bin; Wu, Dongmin, E-mail: dmwu2008@sinano.ac.cn [i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125 (China); Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123 (China); Wang, Jine; Pei, Renjun, E-mail: rjpei2011@sinano.ac.cn [Division of Nanobiomedicine, Key Laboratory for Nano-Bio Interface Research, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123 (China); Wu, Zhengyan, E-mail: zywu@ipp.ac.cn [Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031 (China)

    2014-08-25T23:59:59.000Z

    An oligonucleotide-functionalized ion sensitive AlGaN/GaN high electron mobility transistor (HEMT) was fabricated to detect trace amounts of Hg{sup 2+}. The advantages of ion sensitive AlGaN/GaN HEMT and highly specific binding interaction between Hg{sup 2+} and thymines were combined. The current response of this Hg{sup 2+} ultrasensitive transistor was characterized. The current increased due to the accumulation of Hg{sup 2+} ions on the surface by the highly specific thymine-Hg{sup 2+}-thymine recognition. The dynamic linear range for Hg{sup 2+} detection has been determined in the concentrations from 10{sup ?14} to 10{sup ?8} M and a detection limit below 10{sup ?14} M level was estimated, which is the best result of AlGaN/GaN HEMT biosensors for Hg{sup 2+} detection till now.

  9. Data-based estimates of suboxia, denitrification, and N2O production in the ocean and their sensitivities to dissolved O2

    E-Print Network [OSTI]

    pathways, N2O is a powerful greenhouse gas that affects the Earth's energy balance and climate. The ocean

  10. Tillage and seasonal emissions of CO2, N2O and NO across a seed bed and at the field scale in a Mediterranean climate

    E-Print Network [OSTI]

    van Kessel, Chris

    Tillage and seasonal emissions of CO2, N2O and NO across a seed bed and at the field scale, N2O emissions from soil management activities accounted for 29.7% of the combined emissions of CO2 estimates across fields remain uncertain. Here, we quantified CO2, N2O, and NO emissions from an irrigated

  11. Intrinsic Spin Hall Effect Induced by Quantum Phase Transition in HgCdTe Quantum Wells

    SciTech Connect (OSTI)

    Yang, Wen; Chang, Kai; /Beijing, Inst. Semiconductors; Zhang, Shou-Cheng; /Stanford U., Phys. Dept.

    2010-03-19T23:59:59.000Z

    Spin Hall effect can be induced both by the extrinsic impurity scattering and by the intrinsic spin-orbit coupling in the electronic structure. The HgTe/CdTe quantum well has a quantum phase transition where the electronic structure changes from normal to inverted. We show that the intrinsic spin Hall effect of the conduction band vanishes on the normal side, while it is finite on the inverted side. This difference gives a direct mechanism to experimentally distinguish the intrinsic spin Hall effect from the extrinsic one.

  12. Quantum Anomalous Hall Effect in Hg_1-yMn_yTe Quantum Wells

    SciTech Connect (OSTI)

    Liu, Chao-Xing; /Tsinghua U., Beijing /Stanford U., Phys. Dept.; Qi, Xiao-Liang; /Stanford U., Phys. Dept.; Dai, Xi; Fang, Zhong; /Beijing, Inst. Phys.; Zhang, Shou-Cheng; /Stanford U., Phys. Dept.

    2010-03-19T23:59:59.000Z

    The quantum Hall effect is usually observed when the two-dimensional electron gas is subjected to an external magnetic field, so that their quantum states form Landau levels. In this work we predict that a new phenomenon, the quantum anomalous Hall effect, can be realized in Hg{sub 1-y}Mn{sub y}Te quantum wells, without the external magnetic field and the associated Landau levels. This effect arises purely from the spin polarization of the Mn atoms, and the quantized Hall conductance is predicted for a range of quantum well thickness and the concentration of the Mn atoms. This effect enables dissipationless charge current in spintronics devices.

  13. Structures and phase diagrams of N2 and CO to 13 GPa by x-ray diffraction

    SciTech Connect (OSTI)

    Mills, R.L.; Olinger, B.; Cromer, D.T.

    1986-03-01T23:59:59.000Z

    The structures and phase transitions of N2 and CO were studied by powder x-ray diffraction from 100 to 300 K and 4 to 13 GPa. Three solid phases, US , delta, and epsilon, were observed in each material. The known US and delta solids were confirmed to have hexagonal space group P63/mmc and cubic space group Pm3n, respectively. From refinements using photographic x-ray intensities, the new epsilon-N2 and epsilon-CO structures were determined to be rhombohedral R3c. There are eight ordered molecules in the epsilon-N2 unit cell with a = 5.928 A and = 85.14 at 110 K and 7.8 GPa, and eight ordered molecules in the epsilon-CO unit cell with a = 6.059 A and = 85.73 at 100 K and 5.5 GPa. The CO molecules are randomly oriented head to tail. The delta--epsilon transition takes place through an ordering and small displacement of the N2 and CO molecules, accompanied by a slight extension of the lattice along a cube diagonal. Molar volumes are presented over an expanded P-T region. Recent theoretical calculations using lattice energies, molecular dynamics, and symmetry correlations correctly predict features in the N2 and CO phase diagrams.

  14. High resolution n = 3 to n = 2 spectra of neon-like silver

    SciTech Connect (OSTI)

    Beiersdorfer, P.; Bitter, M.; von Goeler, S.; Cohen, S.; Hill, K.W.; Timberlake, J.; Walling, R.S.; Chen, M.H.; Hagelstein, P.L.; Scofield, J.H.

    1986-04-01T23:59:59.000Z

    Spectra of the n = 3 to n = 2 transitions in neon-like silver emitted from the Princeton Large Torus have been recorded with a high-resolution Bragg-crystal spectrometer. The measurements cover the wavelength region 3.3 to 4.1 A and include the forbidden 3p ..-->.. 2p electric quadrupole lines. Transitions in the adjacent sodium-like, and aluminum-like charge states of silver have also been observed and identified. The Ly-..cap alpha.. spectra of hydrogen-like argon and iron, the K..cap alpha.. spectra of helium-like argon, potassium, manganese, and iron, and the K..beta.. spectrum of helium-like argon fall in the same wavelength region in first or second order and have been measured concurrently. These spectra provide a coherent set of wavelength reference data obtained with the same spectrometer and from the same tokamak. This set is used as a basis to compare wavelength predictions for one- and two-electron systems to each other and to determine the transition energies of the silver lines with great accuracy.

  15. Unified N=2 Maxwell-Einstein and Yang-Mills-Einstein Supergravity Theories in Four Dimensions

    E-Print Network [OSTI]

    Günaydin, M; Zagermann, M

    2005-01-01T23:59:59.000Z

    We study unified N=2 Maxwell-Einstein supergravity theories (MESGTs) and unified Yang-Mills Einstein supergravity theories (YMESGTs) in four dimensions. As their defining property, these theories admit the action of a global or local symmetry group that is (i) simple, and (ii) acts irreducibly on all the vector fields of the theory, including the ``graviphoton''. Restricting ourselves to the theories that originate from five dimensions via dimensional reduction, we find that the generic Jordan family of MESGTs with the scalar manifolds [SU(1,1)/U(1)] X [SO(2,n)/SO(2)X SO(n)] are all unified in four dimensions with the unifying global symmetry group SO(2,n). Of these theories only one can be gauged so as to obtain a unified YMESGT with the gauge group SO(2,1). Three of the four magical supergravity theories defined by simple Euclidean Jordan algebras of degree 3 are unified MESGTs in four dimensions. Two of these can furthermore be gauged so as to obtain 4D unified YMESGTs with gauge groups SO(3,2) and SO(6,2)...

  16. The influence of SF6 and SF6/N2 gas pressure to the breakdown performance of polyester film

    SciTech Connect (OSTI)

    Zhang Peihong; Gong Guoli; Dong Guangyu [Harbin Univ. of Science and Technology (China). Dept. of Electrical Material; Dong Zhenhua [Shenyang Research Inst. of Transformer (China)

    1996-12-31T23:59:59.000Z

    SF6 has been widely used as the gas insulating medium in gas insulated transformer, and polyester film used as the turn insulation and other insulating materials. In this paper, the insulation strength of turn insulation of SF6/N2-film is tested when the SF6 is replaced by SF6/N2 mixed gas, and also compared with that of SF6-film. The results show that the power frequency breakdown voltage and breakdown stress of SF6/N2-film is lower than that of SF6-film in the same pressure and the same film thickness, the mean value of the former is about 91% of the latter. In order to reach the same level of turn insulation strength in the operation range, the gas pressure must be increased by 0.05 Mpa.

  17. Benzene-derived N2-(4-hydroxyphenyl)-deoxyguanosine adduct: UvrABC incision and its conformation in DNA

    SciTech Connect (OSTI)

    Hang, Bo; Rodriguez, Ben; Yang, Yanu; Guliaev, Anton B.; Chenna, Ahmed

    2010-06-14T23:59:59.000Z

    Benzene, a ubiquitous human carcinogen, forms DNA adducts through its metabolites such as p-benzoquinone (p-BQ) and hydroquinone (HQ). N(2)-(4-Hydroxyphenyl)-2'-deoxyguanosine (N(2)-4-HOPh-dG) is the principal adduct identified in vivo by (32)P-postlabeling in cells or animals treated with p-BQ or HQ. To study its effect on repair specificity and replication fidelity, we recently synthesized defined oligonucleotides containing a site-specific adduct using phosphoramidite chemistry. We here report the repair of this adduct by Escherichia coli UvrABC complex, which performs the initial damage recognition and incision steps in the nucleotide excision repair (NER) pathway. We first showed that the p-BQ-treated plasmid was efficiently cleaved by the complex, indicating the formation of DNA lesions that are substrates for NER. Using a 40-mer substrate, we found that UvrABC incises the DNA strand containing N(2)-4-HOPh-dG in a dose- and time-dependent manner. The specificity of such repair was also compared with that of DNA glycosylases and damage-specific endonucleases of E. coli, both of which were found to have no detectable activity toward N(2)-4-HOPh-dG. To understand why this adduct is specifically recognized and processed by UvrABC, molecular modeling studies were performed. Analysis of molecular dynamics trajectories showed that stable G:C-like hydrogen bonding patterns of all three Watson-Crick hydrogen bonds are present within the N(2)-4-HOPh-G:C base pair, with the hydroxyphenyl ring at an almost planar position. In addition, N(2)-4-HOPh-dG has a tendency to form more stable stacking interactions than a normal G in B-type DNA. These conformational properties may be critical in differential recognition of this adduct by specific repair enzymes.

  18. Report on International Collaboration Involving the FE Heater and HG-A Tests at Mont Terri

    SciTech Connect (OSTI)

    Houseworth, Jim; Rutqvist, Jonny; Asahina, Daisuke; Chen, Fei; Vilarrasa, Victor; Liu, Hui-Hai; Birkholzer, Jens

    2013-11-06T23:59:59.000Z

    Nuclear waste programs outside of the US have focused on different host rock types for geological disposal of high-level radioactive waste. Several countries, including France, Switzerland, Belgium, and Japan are exploring the possibility of waste disposal in shale and other clay-rich rock that fall within the general classification of argillaceous rock. This rock type is also of interest for the US program because the US has extensive sedimentary basins containing large deposits of argillaceous rock. LBNL, as part of the DOE-NE Used Fuel Disposition Campaign, is collaborating on some of the underground research laboratory (URL) activities at the Mont Terri URL near Saint-Ursanne, Switzerland. The Mont Terri project, which began in 1995, has developed a URL at a depth of about 300 m in a stiff clay formation called the Opalinus Clay. Our current collaboration efforts include two test modeling activities for the FE heater test and the HG-A leak-off test. This report documents results concerning our current modeling of these field tests. The overall objectives of these activities include an improved understanding of and advanced relevant modeling capabilities for EDZ evolution in clay repositories and the associated coupled processes, and to develop a technical basis for the maximum allowable temperature for a clay repository. The R&D activities documented in this report are part of the work package of natural system evaluation and tool development that directly supports the following Used Fuel Disposition Campaign (UFDC) objectives: ? Develop a fundamental understanding of disposal-system performance in a range of environments for potential wastes that could arise from future nuclear-fuel-cycle alternatives through theory, simulation, testing, and experimentation. ? Develop a computational modeling capability for the performance of storage and disposal options for a range of fuel-cycle alternatives, evolving from generic models to more robust models of performance assessment. For the purpose of validating modeling capabilities for thermal-hydro-mechanical (THM) processes, we developed a suite of simulation models for the planned full-scale FE Experiment to be conducted in the Mont Terri URL, including a full three-dimensional model that will be used for direct comparison to experimental data once available. We performed for the first time a THM analysis involving the Barcelona Basic Model (BBM) in a full three-dimensional field setting for modeling the geomechanical behavior of the buffer material and its interaction with the argillaceous host rock. We have simulated a well defined benchmark that will be used for codeto- code verification against modeling results from other international modeling teams. The analysis highlights the complex coupled geomechanical behavior in the buffer and its interaction with the surrounding rock and the importance of a well characterized buffer material in terms of THM properties. A new geomechanical fracture-damage model, TOUGH-RBSN, was applied to investigate damage behavior in the ongoing HG-A test at Mont Terri URL. Two model modifications have been implemented so that the Rigid-Body-Spring-Network (RBSN) model can be used for analysis of fracturing around the HG-A microtunnel. These modifications are (1) a methodology to compute fracture generation under compressive stress conditions and (2) a method to represent anisotropic elastic and strength properties. The method for computing fracture generation under compressive load produces results that roughly follow trends expected for homogeneous and layered systems. Anisotropic properties for the bulk rock were represented in the RBSN model using layered heterogeneity and gave bulk material responses in line with expectations. These model improvements were implemented for an initial model of fracture damage at the HG-A test. While the HG-A test model results show some similarities with the test observations, differences between the model results and observations remain.

  19. Vibrational Spectroscopy of Mass Selected [UO2(ligand)n]2+ Complexes in the Gas Phase

    SciTech Connect (OSTI)

    Gary S. Groenewold; Anita Gianotto; Michael Vanstipdonk; Kevin C. Cossel; David T. Moore,; Nick Polfer; Jos Oomens

    2006-03-01T23:59:59.000Z

    The gas-phase infrared spectra of discrete uranyl ([UO2]2+) complexes ligated with acetone and/or acetonitrile were used to evaluate systematic trends of ligation on the position of the O=U=O stretch, and to enable rigorous comparison with the results of computational studies. Ionic uranyl complexes isolated in a Fourier transform ion cyclotron resonance mass spectrometer were fragmented via infrared multiphoton dissociation using a free electron laser scanned over the mid-IR wavelengths. The asymmetric O=U=O stretching frequency was measured at 1017 cm-1 for [UO2(CH3COCH3)2]2+, and was systematically red shifted to 1000 and 988 cm-1 by the addition of a third and fourth acetone ligands, respectively, which was consistent with more donation of electron density to the uranium center in complexes with higher coordination number. The experimental measurements were in good agreement with values generated computationally using LDA, B3LYP, and ZORA-PW91 approaches. In contrast to the uranyl frequency shifts, the carbonyl frequencies of the acetone ligands were progressively blue shifted as the number of ligands increased from 2 to 4, and approached that of free acetone. This observation was consistent with the formation of weaker noncovalent bonds between uranium and the carbonyl oxygen as the extent of ligation increases. Similar trends were observed for [UO2(CH3CN)n]2+ complexes although the magnitude of the red shift in the uranyl frequency upon addition more acetonitrile ligands was smaller than for acetone, consistent with the more modest nucleophilic nature of acetonitrile. This conclusion was amplified by the uranyl stretching frequencies measured for mixed acetone/acetonitrile complexes, which showed that substitution of one acetone for one acetonitrile produced a modest red shift of 3 to 6 cm-1.

  20. Unified N=2 Maxwell-Einstein and Yang-Mills-Einstein Supergravity Theories in Four Dimensions

    E-Print Network [OSTI]

    M. Gunaydin; S. McReynolds; M. Zagermann

    2005-07-22T23:59:59.000Z

    We study unified N=2 Maxwell-Einstein supergravity theories (MESGTs) and unified Yang-Mills Einstein supergravity theories (YMESGTs) in four dimensions. As their defining property, these theories admit the action of a global or local symmetry group that is (i) simple, and (ii) acts irreducibly on all the vector fields of the theory, including the ``graviphoton''. Restricting ourselves to the theories that originate from five dimensions via dimensional reduction, we find that the generic Jordan family of MESGTs with the scalar manifolds [SU(1,1)/U(1)] X [SO(2,n)/SO(2)X SO(n)] are all unified in four dimensions with the unifying global symmetry group SO(2,n). Of these theories only one can be gauged so as to obtain a unified YMESGT with the gauge group SO(2,1). Three of the four magical supergravity theories defined by simple Euclidean Jordan algebras of degree 3 are unified MESGTs in four dimensions. Two of these can furthermore be gauged so as to obtain 4D unified YMESGTs with gauge groups SO(3,2) and SO(6,2), respectively. The generic non-Jordan family and the theories whose scalar manifolds are homogeneous but not symmetric do not lead to unified MESGTs in four dimensions. The three infinite families of unified five-dimensional MESGTs defined by simple Lorentzian Jordan algebras, whose scalar manifolds are non-homogeneous, do not lead directly to unified MESGTs in four dimensions under dimensional reduction. However, since their manifolds are non-homogeneous we are not able to completely rule out the existence of symplectic sections in which these theories become unified in four dimensions.

  1. Mesure de la densit lectronique et carts l'quilibre de composition dans les arcs de SF6-N2

    E-Print Network [OSTI]

    Boyer, Edmond

    1325 Mesure de la densité électronique et écarts à l'équilibre de composition dans les arcs de SF6 mesurée dans des arcs stabilisés brûlant dans des mélanges SF6-N2, par des techniques de spectroscopie d électronique en fonction du pourcentage de SF6 dans le mélange et en fonction de l'intensité du courant sont en

  2. Qualitative analysis of Zircaloy-4 cladding air degradation in O2-N2 mixtures at high temperature

    E-Print Network [OSTI]

    Boyer, Edmond

    . Thermogravimetry, optical microscopy, scanning electron microscopy and energy dispersive X-ray spectrometry1 Qualitative analysis of Zircaloy-4 cladding air degradation in O2-N2 mixtures at high temperature Email: M. Lasserre (marina.lasserre@irsn.fr) Keywords: Zircaloy-4; thermogravimetry; high temperature

  3. Probing the Vibrational Relaxation of N2 and O2 by Use of CARS Spectroscopy to Model NTE-Turbulence

    E-Print Network [OSTI]

    Dean, Jacob

    2009-06-09T23:59:59.000Z

    -thermochemical equilibrium (NTE) exists downstream of strong shock fronts and encountered in the shear layers from hypersonic flight, and coupled with turbulence, it has significant effects on flow dynamics. NTE, characterized by high vibrational temperatures of N2 and O2...

  4. Jeffrey R. Row Environment and Resource Studies, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1

    E-Print Network [OSTI]

    Row, Jeffrey R.

    , N2L 3G1 Website: http://jeffrow.ca · Email: jeff.row@me.com · Phone: 1-416-399-3066 1 Education 2006 and population structure of foxsnakes across spatial and temporal scales. 2003-2005 M.Sc. Biology, University (Lampropeltis triangulum). 1997-2001 B.Sc. Environmental Biology, Queen's University, Kingston, Ontario. 2

  5. HNO3, N2O5, and ClONO2 enhancements after the OctoberNovember 2003 solar proton

    E-Print Network [OSTI]

    Jackman, Charles H.

    HNO3, N2O5, and ClONO2 enhancements after the October­November 2003 solar proton events M. Lo-energy protons which reached the Earth and penetrated into the middle atmosphere in the polar regions solar proton events. Two distinct HNO3 enhancements were observed. An instantaneous increase of 1­2 ppbv

  6. Gas Hydrate Equilibria for CO2-N2 and CO2-CH4 gas mixtures Experimental studies and Thermodynamic Modelling

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Gas Hydrate Equilibria for CO2-N2 and CO2-CH4 gas mixtures ­ Experimental studies and Thermodynamic of experimental data on the phase equilibrium of gas hydrates in the presence of binary gas mixtures comprising CO of the gas phase as well as the hydrate phase without the need to sample the hydrate. The experimental

  7. Boltzmann Equation Analysis of Electron Transport in a N2O2 Streamer Discharge Sasa Dujko1;2;3

    E-Print Network [OSTI]

    Ebert, Ute

    , P. O. Box 68, Zemun, Belgrade 11080, Serbia 3 ARC Centre for Antimatter­Matter Studies, School-equilibrium electrons in the leading part of the ionization front are treated by a Monte Carlo simulation while the low-energy and attachment in mixtures of molecular N2 and O2. Values and general trends in the profiles of the mean energy

  8. Abundance analysis of SB2 binary stars with HgMn primaries

    E-Print Network [OSTI]

    T. Ryabchikova

    1998-05-06T23:59:59.000Z

    We present a short review of the abundances in the atmospheres of SB2 systems with Mercury-Manganese (HgMn) primaries. Up to now a careful study has been made for both components of 8 out of 17 known SB2 binaries with orbital periods shorter than 100 days and mass ratio ranging from 1.08 to 2.2. For all eight systems we observe a lower Mn abundance in the secondary's atmospheres than in the primary's. Significant difference in the abundances is also found for some peculiar elements such as Ga, Xe, Pt. All secondary stars with effective temperatures less than 10000 K show abundance characteristics typical of the metallic-line stars.

  9. Determination of the cross sections of (n,2n), (n,gamma) nuclear reactions on germanium isotopes at the energy of neutrons 13.96 MeV

    E-Print Network [OSTI]

    S. V. Begun; O. G. Druzheruchenko; O. O. Pupirina; V. K. Tarakanov

    2007-01-23T23:59:59.000Z

    The cross sections of 70Ge(n,2n)69Ge, 72Ge(n,2n)71Ge, 76Ge(n,gamma)77(g+0.21m)Ge, 76Ge(n,2n)75Ge nuclear reactions were measured at the energy of neutrons 13.96(6) MeV by activation method with gamma-ray and X-ray spectra studies.

  10. Demonstrating the Model Nature of the High-Temperature Superconductor HgBa2CuO4+d

    SciTech Connect (OSTI)

    Barisic, Neven; Li, Yuan; Zhao, Xudong; Cho, Yong-Chan; Chabot-Couture, Guillaume; Yu, Guichuan; Greven, Martin; /SLAC, SSRL /Boskovic Inst., Zagreb /Stanford U., Phys. Dept. /Jilin U. /Stanford U., Appl. Phys. Dept.

    2008-09-30T23:59:59.000Z

    The compound HgBa{sub 2}CuO{sub 4+{delta}} (Hg1201) exhibits a simple tetragonal crystal structure and the highest superconducting transition temperature (T{sub c}) among all single Cu-O layer cuprates, with T{sub c} = 97 K (onset) at optimal doping. Due to a lack of sizable single crystals, experimental work on this very attractive system has been significantly limited. Thanks to a recent breakthrough in crystal growth, such crystals have now become available. Here, we demonstrate that it is possible to identify suitable heat treatment conditions to systematically and uniformly tune the hole concentration of Hg1201 crystals over a wide range, from very underdoped (T{sub c} = 47 K, hole concentration p {approx} 0.08) to overdoped (T{sub c} = 64 K, p {approx} 0.22). We then present quantitative magnetic susceptibility and DC charge transport results that reveal the very high-quality nature of the studied crystals. Using XPS on cleaved samples, we furthermore demonstrate that it is possible to obtain large surfaces of good quality. These characterization measurements demonstrate that Hg1201 should be viewed as a model high-temperature superconductor, and they provide the foundation for extensive future experimental work.

  11. Le gisement Ag Hg de Zgounder (Jebel Siroua, Anti-Atlas, Maroc) : un pithermal noprotrozoque de type

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Le gisement Ag Hg de Zgounder (Jebel Siroua, Anti- Atlas, Maroc) : un épithermal néoprotérozoïque Compagnie minière de Touissit (CMT), 279, bd Zerktouni, Casablanca, Maroc Abstract The Zgounder ore deposit and more as a silver metallogenic province Résumé Le gisement argentifère de Zgounder (Anti-Atlas, Maroc

  12. Trace Metals (Cd, Cu, Hg, and Pb) Accumulation Recorded in the Intertidal Mudflat Sediments of Three Coastal

    E-Print Network [OSTI]

    Long, Bernard

    Trace Metals (Cd, Cu, Hg, and Pb) Accumulation Recorded in the Intertidal Mudflat Sediments the intertidal mudflat sedi- ments of the coastal lagoons Chiricahueto, Estero de Urías, and Ohuira surrounding these lagoons. Keywords 210 Pb geochronology. Coastal lagoons . Metal pollution . Mudflat

  13. Samuel Warren Scott REYST report 08-2011

    E-Print Network [OSTI]

    Karlsson, Brynjar

    on the chemical and physical processes that account for the concentrations of the major gases (CO2, H2S, H2 and N2, clinozoisite and prehnite. The concentrations of H2S and H2 generally seem to be controlled by a mineral and H2S concentrations are higher in the proximity of two proposed upflow zones: 1) near the eruptive

  14. N = 2 superconformal algebra in NSR string and Gepner approach to space-time supersymmetry in ten dimensions

    E-Print Network [OSTI]

    Belavin, Alexander

    2015-01-01T23:59:59.000Z

    The fermionic NSR string possesses a hidden N = 2 superconformal algebra on the world-sheet. In this work, we show how to use an isomorphism of this algebra, the so-called spectral flow, for construction of a subspace of physical states of the string, on which space-time supersymmetry acts. This construction is an alternative to the GSO-projection in string theory.

  15. Diagnosing ions and neutrals via n=2 excited hydrogen atoms in plasmas with high electron density and low electron temperature

    SciTech Connect (OSTI)

    Shumack, A. E.; Schram, D. C.; Biesheuvel, J.; Goedheer, W. J.; Rooij, G. J. van [FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, Nieuwegein (Netherlands)

    2011-03-15T23:59:59.000Z

    Ion and neutral parameters are determined in the high electron density, magnetized, hydrogen plasma beam of an ITER divertor relevant plasma via measurements of the n=2 excited neutrals. Ion rotation velocity (up to 7 km/s) and temperature (2-3 eV{approx}T{sub e}) are obtained from analysis of H{alpha} spectra measured close to the plasma source. The methodology for neutral density determination is explained whereby measurements in the linear plasma beam of Pilot-PSI are compared to modeling. Ground-state atomic densities are obtained via the production rate of n=2 and the optical thickness of the Lyman-{alpha} transition (escape factor {approx}0.6) and yield an ionization degree >85% and dissociation degree in the residual gas of {approx}4%. A 30% proportion of molecules with a rovibrational excitation of more than 2 eV is deduced from the production rate of n=2 atoms. This proportion increases by more than a factor of 4 for a doubling of the electron density in the transition to ITER divertor relevant electron densities, probably because of a large increase in the production and confinement of ground-state neutrals. Measurements are made using laser-induced fluorescence (LIF) and absorption, the suitability of which are evaluated as diagnostics for this plasma regime. Absorption is found to have a much better sensitivity than LIF, mainly owing to competition with background emission.

  16. Trap Activation Energy and Transport Parameters of HgI$_2$ Crystals for Bubble-Plasma Diagnostics

    E-Print Network [OSTI]

    M. B. Miller; V. F. Kushniruk; A. V. Sermyagin

    2003-01-13T23:59:59.000Z

    In recent data on neutron induced acoustic cavitation in deuterium--containing liquids obtained by neutron measurements it was shown that very high temperatures could arise in some special cases. To study temperature of so--called bubble plasma it is desirable to have micro--detectors of X-rays, which can be prepared on the basis of room--temperature semiconductor detectors, in particular on mercuric iodide ($\\alpha$--HgI$_2$) crystals. Having in view this aim, the properties of gel--grown ($\\alpha$--HgI$_2$) crystals was studied by means of isothermal currents, and trap parameters was estimated. Results are promising for special aim of preparing X-ray detectors with moderate energy resolution needed in bubble--plasma diagnostic, though improving of crystal growing technology is necessary. {\\it PACS:} 29.40.Wk; 52.70.La {\\it Keywords:} X-ray and gamma--ray measurements; semiconductor detectors; mercuric iodide; plasma diagnostics; cavitation

  17. A $\\mathcal{N}=2$ Supersymmetric $AdS_4$ Solution in M-theory with Purely Magnetic Flux

    E-Print Network [OSTI]

    Yolanda Lozano; Niall T. Macpherson; Jesús Montero

    2015-07-10T23:59:59.000Z

    We find a new $\\mathcal{N}=2$ $AdS_4$ solution in M-theory supported by purely magnetic flux via a sequence of abelian and non-abelian T-dualities. This provides the second known example in this class besides the uplift of the Pernici and Sezgin solution to 7d gauged supergravity constructed in the eighties. We compute the free energy of the solution, and show that it scales as $N^{3/2}$. It is intriguing that even though the natural holographic interpretation is in terms of M5-branes wrapped on a special Lagrangian 3-cycle, this solution does not exhibit the expected $N^3$ behavior.

  18. PET exam A 424304 20-032013 Short answers 111. Ex = Ex (O2) + Ex(N2) + Ex (unmix)

    E-Print Network [OSTI]

    Zevenhoven, Ron

    (303/293)+8,314*293*ln(5) = 2288,6 W Similar Ex (N2) = 3709,8 W, and Ex (unmix) = 3478,1 W Total = 9475,6 W, p effect = 63,2 %, T effect = 0,1 %, unmix effect = 36,7 %. 112. a. Electricity out = 2400 MW. Exlosses = T·gen = 293·gen = 163,8 ­ 75 = 88,8 MW gen = 303,1 kW/K d. Efficiency = 75 MW/163,8 MW = 45

  19. Structural and optical properties of core–shell Ag{sub 2}S/HgS nanostructures

    SciTech Connect (OSTI)

    Basyach, Priyanka; Choudhury, Amarjyoti, E-mail: ajc@tezu.ernet.in

    2013-07-15T23:59:59.000Z

    Graphical abstract: - Highlights: • Core–shell Ag{sub 2}S/HgS nanostructures are successfully synthesized. • The particle size and the structure were confirmed through TEM images. • The absorbance analysis reveals red shift with increasing shell concentration. • A transition from TYPE 1 to TYPE 2 core–shell nanostructure is observed. - Abstract: Here we report on a two-step synthesis route for fabrication of core–shell Ag{sub 2}S/HgS nanostructures. Nanoscale Ag{sub 2}S semiconductors are prepared by a standard redox reaction using AgNO{sub 3} and CS{sub 2} as the reactants in PVP. HgS layers are developed on Ag{sub 2}S cores through S-S bonding at the interface separating the two systems. The properties of these core–shell nanostructures are studied via various spectroscopic and microscopic tools like UV–Vis absorption spectra, photoluminescence spectra, X-ray diffraction pattern and transmission electron microscopic images. Change in optical properties is observed while varying the shell thickness in the sample. A detailed study on the luminescence properties reveal transition from TYPE 1 to TYPE 2 core–shell nanostructures is observed with increasing shell thickness.

  20. Perfect electrical switching of edge channel transport in HgTe quantum wells controlled by gate voltage

    SciTech Connect (OSTI)

    Fu, Hua-Hua, E-mail: hhfu@mail.hust.edu.cn; Wu, Dan-Dan; Gu, Lei [College of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074 (China)

    2014-08-14T23:59:59.000Z

    We present a proposal to realize a perfect electrical switching of topological edge-state transport in a HgTe quantum well (QW). In our device design, we place a strip-like top gate voltage in a conventional quantum-point-contact (QPC) region in the HgTe QW. The numerical calculations show that upon increasing the gate voltage, two new conductance channels are developed in the transport direction and just neighbouring the boundaries of the top gate. The quantum states in the new channels can couple with the edge states to open a gap in energy spectrum, and in turn the gap width can be adjusted by the gate voltage, indicating that switch-on/off of the edge channels can be manipulated in a controllable way. Our device can not only be considered as a development of the conventional QPC structure based on the HgTe QW but also provides a new route to realize topological electrical switchers.

  1. Combined Theoretical and Experimental Investigation and Design of H2S Tolerant Anode for Solid Oxide Fuel Cells

    SciTech Connect (OSTI)

    Gerardine G. Botte; Damilola Daramola; Madhivanan Muthuvel

    2009-01-07T23:59:59.000Z

    A solid oxide fuel cell (SOFC) is a high temperature fuel cell and it normally operates in the range of 850 to 1000 C. Coal syngas has been considered for use in SOFC systems to produce electric power, due to its high temperature and high hydrogen and carbon monoxide content. However, coal syngas also has contaminants like carbon dioxide (CO{sub 2}) and hydrogen sulfide (H{sub 2}S). Among these contaminants, H{sub 2}S is detrimental to electrode material in SOFC. Commonly used anode material in SOFC system is nickel-yttria stabilized zirconia (Ni-YSZ). The presence of H{sub 2}S in the hydrogen stream will damage the Ni anode and hinder the performance of SOFC. In the present study, an attempt was made to understand the mechanism of anode (Ni-YSZ) deterioration by H{sub 2}S. The study used computation methods such as quantum chemistry calculations and molecular dynamics to predict the model for anode destruction by H{sub 2}S. This was done using binding energies to predict the thermodynamics and Raman spectroscopy to predict molecular vibrations and surface interactions. On the experimental side, a test stand has been built with the ability to analyze button cells at high temperature under syngas conditions.

  2. Injection of CO2 with H2S and SO2 and Subsequent Mineral Trapping in Sandstone-Shale Formation

    SciTech Connect (OSTI)

    Xu, Tianfu; Apps, John A.; Pruess, Karsten; Yamamoto, Hajime

    2004-09-07T23:59:59.000Z

    Carbon dioxide (CO{sub 2}) injection into deep geologic formations can potentially reduce atmospheric emissions of greenhouse gases. Sequestering less-pure CO{sub 2} waste streams (containing H{sub 2}S and/or SO{sub 2}) would be less expensive or would require less energy than separating CO{sub 2} from flue gas or a coal gasification process. The long-term interaction of these injected acid gases with shale-confining layers of a sandstone injection zone has not been well investigated. We therefore have developed a conceptual model of injection of CO{sub 2} with H{sub 2}S and/or SO{sub 2} into a sandstone-shale sequence, using hydrogeologic properties and mineral compositions commonly encountered in Gulf Coast sediments of the United States. We have performed numerical simulations of a 1-D radial well region considering sandstone alone and a 2-D model using a sandstone-shale sequence under acid-gas injection conditions. Results indicate that shale plays a limited role in mineral alteration and sequestration of gases within a sandstone horizon for short time periods (10,000 years in present simulations). The co-injection of SO{sub 2} results in different pH distribution, mineral alteration patterns, and CO{sub 2} mineral sequestration than the co-injection of H{sub 2}S or injection of CO{sub 2} alone. Simulations generate a zonal distribution of mineral alteration and formation of carbon and sulfur trapping minerals that depends on the pH distribution. The co-injection of SO{sub 2} results in a larger and stronger acidified zone close to the well. Precipitation of carbon trapping minerals occurs within the higher pH regions beyond the acidified zones. In contrast, sulfur trapping minerals are stable at low pH ranges (below 5) within the front of the acidified zone. Corrosion and well abandonment due to the co-injection of SO{sub 2} could be important issues. Significant CO{sub 2} is sequestered in ankerite and dawsonite, and some in siderite. The CO{sub 2} mineral-trapping capability can reach 80 kg per cubic meter of medium. Most sulfur is trapped through alunite precipitation, although some is trapped by anhydrite precipitation and minor amount of pyrite. The addition of the acid gases and induced mineral alteration result in changes in porosity. The limited information currently available on the mineralogy of natural high-pressure acid-gas reservoirs is generally consistent with our simulations.

  3. Modeling of fate and transport of co-injection of H2S with CO2 in deep saline formations

    E-Print Network [OSTI]

    Zhang, W.

    2011-01-01T23:59:59.000Z

    1 ? S lr ) S lr : residual water saturation m : exponent1 ? S lr ) S lr : residual water saturation m : exponent S

  4. REMOVAL OF H2S AND SO2 BY CaCO3-BASED SORBENTS AT HIGH PRESSURES

    SciTech Connect (OSTI)

    Prof. Stratis V. Sotirchos

    2000-09-01T23:59:59.000Z

    The mechanism of the removal of SO{sub 2} and H{sub 2}S by CaCO{sub 3}-based sorbents in pressurized fluidized-bed coal combustors (PFBC) and high pressure gasifiers was investigated in this project. Reactivity evolution experiments were carried out in thermogravimetric apparatuses both under simulated high pressure conditions and at high pressures. Experiments at high pressure were conducted in a high pressure thermogravimetric arrangement that was set up and developed under this project. Two calcitic solids of high calcium carbonate content (over 97%) were employed in the experiments: a fine-grained distributed by Greer Limestone Co. (Greer Limestone) and a solid supplied in the form of large calcitic crystals (Iceland Spar). The decision to work with these solids was mainly based on the fact that they have been employed in several past studies of sulfation, sulfidation, and calcination in our laboratory, and therefore, a large volume of data on their performance under different conditions was available for comparison purposes. In addition to the experimental studies, work was also done on the development of rigorous mathematical models for the description of the occurrence of simultaneous processes (e.g., calcination and sulfation and carbonation and sulfation) in the interior of porous solids and for the simulation of the evolution of the pore structure of porous solids that undergo chemical transformation in their interior.

  5. A dsorption of H2 S or SO2 on an activated carbon cloth modified by ammonia treatment

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    by treatment with ammonia/air at 300 8 C or with ammonia/steam at 800 8 C. The pore structure of the samples so prepared was examined by adsorption measurements. Changes in the surface chemistry were assessed by X granular activated carbons with similar pore size distribution [3]. However, the cost of ACFs makes

  6. SYNTHESIS AND CHARACTERIZATION OF CO-AND H2S-TOLERANT ELECTROCATALYSTS FOR PEM FUEL CELL

    SciTech Connect (OSTI)

    Shamsuddin Ilias

    2005-03-29T23:59:59.000Z

    The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. During this reporting period several bi-metallic electrocatalysts were synthesized using ultra-sonication. These catalysts (Pt/Ru, Pt/Mo and Pt/Ir) were tested in MEAs. From Galvonstatic study the catalytic activity was found in the order of: Pt/Ru/C > Pt/Mo/C > Pt/Ir/C. It appears that electrocatalysts prepared by ultra-sonication process are more active compared to the conventional technique. Work is in progress to further study these catalysts for CO-tolerance in PEMFC and identify potential candidate metals for synthesis of tri-metallic electrocatalysts.

  7. Modeling of fate and transport of co-injection of H2S with CO2 in deep saline formations

    E-Print Network [OSTI]

    Zhang, W.

    2011-01-01T23:59:59.000Z

    operation in a depleted sandstone oil reservoir on theformations, and depleted oil or gas reservoirs, for allinclude depleted or depleting oil and gas reservoirs, un-

  8. Modeling of fate and transport of co-injection of H2S with CO2 in deep saline formations

    SciTech Connect (OSTI)

    Zhang, W.; Xu, T.; Li, Y.

    2010-12-15T23:59:59.000Z

    The geological storage of CO{sub 2} in deep saline formations is increasing seen as a viable strategy to reduce the release of greenhouse gases into the atmosphere. However, costs of capture and compression of CO{sub 2} from industrial waste streams containing small quantities of sulfur and nitrogen compounds such as SO{sub 2}, H{sub 2}S and N{sub 2} are very expensive. Therefore, studies on the co-injection of CO{sub 2} containing other acid gases from industrial emissions are very important. In this paper, numerical simulations were performed to study the co-injection of H{sub 2}S with CO{sub 2} in sandstone and carbonate formations. Results indicate that the preferential dissolution of H{sub 2}S gas (compared with CO{sub 2} gas) into formation water results in the delayed breakthrough of H{sub 2}S gas. Co-injection of H{sub 2}S results in the precipitation of pyrite through interactions between the dissolved H{sub 2}S and Fe{sup 2+} from the dissolution of Fe-bearing minerals. Additional injection of H{sub 2}S reduces the capabilities for solubility and mineral trappings of CO{sub 2} compared to the CO{sub 2} only case. In comparison to the sandstone (siliciclastic) formation, the carbonate formation is less favorable to the mineral sequestration of CO{sub 2}. Different from CO{sub 2} mineral trapping, the presence of Fe-bearing siliciclastic and/or carbonate is more favorable to the H{sub 2}S mineral trapping.

  9. Modeling of fate and transport of co-injection of H2S with CO2 in deep saline formations

    E-Print Network [OSTI]

    Zhang, W.

    2011-01-01T23:59:59.000Z

    from flue gas or a coal gasification process are very high,during combustion or gasification of coal is of considerable

  10. Highly Attrition Resistant Zinc Oxide-Based Sorbents for H2S Removal by Spray Drying Technique

    SciTech Connect (OSTI)

    Ryu, C.K.; Lee, J.B.; Ahn, D.H.; Kim, J.J.; Yi, C.K.

    2002-09-19T23:59:59.000Z

    Primary issues for the fluidized-bed/transport reactor process are high attrition resistant sorbent, its high sorption capacity and regenerability, durability, and cost. The overall objective of this project is the development of a superior attrition resistant zinc oxide-based sorbent for hot gas cleanup in integrated coal gasification combined cycle (IGCC). Sorbents applicable to a fluidized-bed hot gas desulfurization process must have a high attrition resistance to withstand the fast solid circulation between a desulfurizer and a regenerator, fast kinetic reactions, and high sulfur sorption capacity. The oxidative regeneration of zinc-based sorbent usually initiated at greater than 600 C with highly exothermic nature causing deactivation of sorbent as well as complication of sulfidation process by side reaction. Focusing on solving the sorbent attrition and regenerability of zinc oxide-based sorbent, we have adapted multi-binder matrices and direct incorporation of regeneration promoter. The sorbent forming was done with a spray drying technique that is easily scalable to commercial quantity.

  11. Accretions of Dark Matter and Dark Energy onto ($n+2$)-dimensional Schwarzschild Black Hole and Morris-Thorne Wormhole

    E-Print Network [OSTI]

    Ujjal Debnath

    2015-03-06T23:59:59.000Z

    We have studied accretion of the dark matter and dark energy onto of $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole. The mass and the rate of change of mass for $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole have been found. We have assumed some candidates of dark energy like holographic dark energy, new agegraphic dark energy, quintessence, tachyon, DBI-essence, etc. The black hole mass and the wormhole mass have been calculated in term of redshift when dark matter and above types of dark energies accrete onto them separately. We have shown that the black hole mass increases and wormhole mass decreases for holographic dark energy, new agegraphic dark energy, quintessence, tachyon accretion and the slope of increasing/decreasing of mass sensitively depends on the dimension. But for DBI-essence accretion, the black hole mass first increases and then decreases and the wormhole mass first decreases and then increases and the slope of increasing/decreasing of mass not sensitively depends on the dimension.

  12. Accretions of Dark Matter and Dark Energy onto ($n+2$)-dimensional Schwarzschild Black Hole and Morris-Thorne Wormhole

    E-Print Network [OSTI]

    Debnath, Ujjal

    2015-01-01T23:59:59.000Z

    We have studied accretion of the dark matter and dark energy onto of $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole. The mass and the rate of change of mass for $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole have been found. We have assumed some candidates of dark energy like holographic dark energy, new agegraphic dark energy, quintessence, tachyon, DBI-essence, etc. The black hole mass and the wormhole mass have been calculated in term of redshift when dark matter and above types of dark energies accrete onto them separately. We have shown that the black hole mass increases and wormhole mass decreases for holographic dark energy, new agegraphic dark energy, quintessence, tachyon accretion and the slope of increasing/decreasing of mass sensitively depends on the dimension. But for DBI-essence accretion, the black hole mass first increases and then decreases and the wormhole mass first decreases and then increases and the slope of increasing/decreasing of mass...

  13. Accretions of Dark Matter and Dark Energy onto ($n+2$)-dimensional Schwarzschild Black Hole and Morris-Thorne Wormhole

    E-Print Network [OSTI]

    Ujjal Debnath

    2015-02-08T23:59:59.000Z

    We have studied accretion of the dark matter and dark energy onto of $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole. The mass and the rate of change of mass for $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole have been found. We have assumed some candidates of dark energy like holographic dark energy, new agegraphic dark energy, quintessence, tachyon, DBI-essence, etc. The black hole mass and the wormhole mass have been calculated in term of redshift when dark matter and above types of dark energies accrete onto them separately. We have shown that the black hole mass increases and wormhole mass decreases for holographic dark energy, new agegraphic dark energy, quintessence, tachyon accretion and the slope of increasing/decreasing of mass sensitively depends on the dimension. But for DBI-essence accretion, the black hole mass first increases and then decreases and the wormhole mass first decreases and then increases and the slope of increasing/decreasing of mass not sensitively depends on the dimension.

  14. The R-map and the Coupling of N=2 Tensor Multiplets in 5 and 4 Dimensions

    E-Print Network [OSTI]

    M. Gunaydin; S. McReynolds; M. Zagermann

    2005-11-02T23:59:59.000Z

    We study the dimensional reduction of five dimensional N=2 Yang-Mills-Einstein supergravity theories (YMESGT) coupled to tensor multiplets. The resulting 4D theories involve first order interactions among tensor and vector fields with mass terms. If the 5D gauge group, K, does not mix the 5D tensor and vector fields, the 4D tensor fields can be integrated out in favor of 4D vector fields and the resulting theory is dual to a standard 4D YMESGT. The gauge group has a block diagonal symplectic embedding and is a semi-direct product of the 5D gauge group K with a Heisenberg group of dimension (2P+1), where 2P is the number of tensor fields in five dimensions. There exists an infinite family of theories, thus obtained, whose gauge groups are pp-wave contractions of the simple noncompact groups of type SO*(2M). If, on the other hand, the 5D gauge group does mix the 5D tensor and vector fields, the resulting 4D theory is dual to a 4D YMESGT whose gauge group does, in general,NOT have a block diagonal symplectic embedding and involves additional topological terms. The scalar potentials of the dimensionally reduced theories naturally have some of the ingredients that were found necessary for stable de Sitter ground states. We comment on the relation between the known 5D and 4D, N=2 supergravities with stable de Sitter ground states.

  15. In-situ spectroscopic ellipsometry for real time composition control of Hg{sub 1{minus}x}Cd{sub x}Te grown by molecular beam epitaxy

    SciTech Connect (OSTI)

    Dat, R.; Aqariden, F.; Chandra, D.; Shih, H.D. [Raytheon TI Systems, Sensors and Infrared Lab., Dallas, TX (United States); Duncan, W.M. [Texas Instruments Inc., Dallas, TX (United States). Components and Materials Research Center

    1998-12-31T23:59:59.000Z

    Spectral ellipsometry (SE) was applied to in situ composition control of Hg{sub 1{minus}x}Cd{sub x}Te grown by molecular beam epitaxy (MBE), and the impact of surface topography of the Hg{sub 1{minus}x}Cd{sub x}Te layers on the accuracy of SE was investigated. Of particular importance is the presence of surface defects, such as voids in MBE-Hg{sub 1{minus}x}Cd{sub x}Te layers. While dislocations do not have any significant impact on the dielectric functions, the experimental data in this work show that MBE-Hg{sub 1{minus}x}Cd{sub x}Te samples having the same composition, but different void densities, have different effective dielectric functions.

  16. 1 Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09

    E-Print Network [OSTI]

    McDonald, Kirk

    1 Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Cryostat 2 Front Drain Mercury Vessel Concept Matthew F. Glisson Van Graves #12;2 Managed by UT-Battelle;3 Managed by UT-Battelle for the U.S. Department of Energy NF/IDS Hg Vessel Layout 30 Jun 09 Cross Section

  17. Vapor-liquid equilibria of coal-derived liquids; 3: Binary systems with tetralin at 200 mmHg

    SciTech Connect (OSTI)

    Blanco, B.; Beltran, S.; Cabezas, J.L. (University Coll., Burgos (Spain). Dept. of Chemical Engineering); Coca, J. (Univ. of Oviedo (Spain). Dept. of Chemical Engineering)

    1994-01-01T23:59:59.000Z

    Isobaric vapor-liquid equilibrium data are reported for binary systems of tetralin with p-xylene, [gamma]-picoline, piperidine, and pyridine; all systems were measured at 26.66 kPa (200 mmHg) with a recirculation still. Liquid-phase activity coefficients were correlated using the Van Laar, Wilson, NRTL, and UNIQUAC equations. Vapor-phase nonidealities were found negligible under the experimental conditions of this work, and deviations of the liquid phase from the ideal behavior, as described by Raoult's law, were found to be slightly positive for all the systems.

  18. European Journal of Soil Science, December 2010, 61, 903913 doi: 10.1111/j.1365-2389.2009.01217.x Towards an agronomic assessment of N2O emissions

    E-Print Network [OSTI]

    van Kessel, Chris

    Towards an agronomic assessment of N2O emissions: a case study for arable crops J . W . V a n G r o e n i. Commonly, N2O emissions are expressed as a function of N application rate. This suggests that smaller fertilizer applications always lead to smaller N2O emissions. Here we argue that, because of global demand

  19. Crystallographic analysis of the structure of livingstonite HgSb{sub 4}S{sub 8} from refined data

    SciTech Connect (OSTI)

    Borisov, S. V., E-mail: borisov@che.nsk.su; Pervukhina, N. V.; Magarill, S. A.; Kuratieva, N. V. [Russian Academy of Sciences, Nikolaev Institute of Inorganic Chemistry, Siberian Branch (Russian Federation); Vasil'ev, V. I., E-mail: itret@uiggm.nsc.ru [Russian Academy of Sciences, Institute of Geology and Mineralogy, Siberian Branch (Russian Federation)

    2010-03-15T23:59:59.000Z

    An X-ray diffraction study of mineral livingstonite (HgSb{sub 4}S{sub 8}) from Khaydarkan (Kyrgyzstan) has been performed on a Bruker Nonius X8Apex diffractometer with a 4K CCD detector (R = 0.031). The unit-cell parameters were found to be a = 30.1543(10) A, b = 3.9953(2) A, c = 21.4262(13) A, {beta} = 104.265(1){sup o}, V = 2501.7(2) A{sup 3}, Z = 8, d{sub calcd} = 5.013 g/cm{sup 3}, and sp. gr. A2/a. It was confirmed that livingstonite belongs to rod-layers structures. In one type of layer, two double Sb{sub 2}S{sub 4} chains are bound by disulfide groups [S{sub 2}]{sup 2-} (S-S 2.078(2) A); in the other type, these chains are bound via Hg{sup 2+} cations. A crystallographic analysis confirmed the existence of independent pseudotranslational ordering in the cation and anion matrices, which is characteristic of the lozenge-like structures of sulfides and sulfosalts.

  20. Hall, Seebeck, and Nernst Coefficients of Underdoped HgBa2CuO4+?: Fermi-Surface Reconstruction in an Archetypal Cuprate Superconductor

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

    Doiron-Leyraud, Nicolas; Lepault, S.; Cyr-Choinière, O.; Vignolle, B.; Grissonnanche, G.; Laliberté, F.; Chang, J.; Bariši?, N.; Chan, M. K.; Ji, L.; Zhao, X.; Li, Y.; Greven, M.; Proust, C.; Taillefer, Louis

    2013-06-01T23:59:59.000Z

    Charge-density-wave order has been observed in cuprate superconductors whose crystal structure breaks the square symmetry of the CuO2 planes, such as orthorhombic YBa2Cu3Oy (YBCO), but not so far in cuprates that preserve that symmetry, such as tetragonal HgBa2CuO4+? (Hg1201). We have measured the Hall (RH), Seebeck (S), and Nernst (?) coefficients of underdoped Hg1201 in magnetic fields large enough to suppress superconductivity. The high-field RH(T) and S(T) are found to drop with decreasing temperature and become negative, as also observed in YBCO at comparable doping. In YBCO, the negative RH and S are signatures of a small electron pocket caused by Fermi-surface reconstruction, attributed to charge-density-wave modulations observed in the same range of doping and temperature. We deduce that a similar Fermi-surface reconstruction takes place in Hg1201, evidence that density-wave order exists in this material. A striking similarity is also found in the normal-state Nernst coefficient ?(T), further supporting this interpretation. Given the model nature of Hg1201, Fermi-surface reconstruction appears to be common to all hole-doped cuprates, suggesting that density-wave order is a fundamental property of these materials.

  1. Twisted compactification of N=2 5D SCFTs to three and two dimensions from F(4) gauged supergravity

    E-Print Network [OSTI]

    Karndumri, Parinya

    2015-01-01T23:59:59.000Z

    We study supersymmetric $AdS_4\\times \\Sigma_2$ and $AdS_3\\times \\Sigma_3$ solutions in half-maximal gauged supergravity in six dimensions with $SU(2)_R\\times SU(2)$ gauge group. The gauged supergravity is obtained by coupling three vector multiplets to the pure $F(4)$ gauged supergravity. The $SU(2)_R$ R-symmetry together with the $SO(3)\\sim SU(2)$ symmetry of the vector multiplets are gauged. The resulting gauged supergravity admits supersymmetric $AdS_6$ critical points with $SO(4)\\sim SU(2)\\times SU(2)$ and $SO(3)\\sim SU(2)_{\\textrm{diag}}$ symmetries. The former corresponds to five-dimensional $N=2$ superconformal field theories (SCFTs) with $E_1\\sim SU(2)$ symmetry. We find new classes of supersymmetric $AdS_4\\times \\Sigma_2$ and $AdS_3\\times \\Sigma_3$ solutions with $\\Sigma_{2,3}$ being $S^{2,3}$ and $H^{2,3}$. These solutions describe SCFTs in three and two dimensions obtained from twisted compactifications of the aforementioned five-dimensional SCFTs with different numbers of unbroken supersymmetry an...

  2. The R-map and the Coupling of N=2 Tensor Multiplets in 5 and 4 Dimensions

    E-Print Network [OSTI]

    Günaydin, M; Zagermann, M

    2006-01-01T23:59:59.000Z

    We study the dimensional reduction of five dimensional N=2 Yang-Mills-Einstein supergravity theories (YMESGT) coupled to tensor multiplets. The resulting 4D theories involve first order interactions among tensor and vector fields with mass terms. If the 5D gauge group, K, does not mix the 5D tensor and vector fields, the 4D tensor fields can be integrated out in favor of 4D vector fields and the resulting theory is dual to a standard 4D YMESGT. The gauge group has a block diagonal symplectic embedding and is a semi-direct product of the 5D gauge group K with a Heisenberg group of dimension (2P+1), where 2P is the number of tensor fields in five dimensions. There exists an infinite family of theories, thus obtained, whose gauge groups are pp-wave contractions of the simple noncompact groups of type SO*(2M). If, on the other hand, the 5D gauge group does mix the 5D tensor and vector fields, the resulting 4D theory is dual to a 4D YMESGT whose gauge group does, in general,NOT have a block diagonal symplectic emb...

  3. Improved performance of HgCdTe infrared detector focal plane arrays by modulating light field based on photonic crystal structure

    SciTech Connect (OSTI)

    Liang, Jian; Hu, Weida, E-mail: wdhu@mail.sitp.ac.cn; Ye, Zhenhua; Li, Zhifeng; Chen, Xiaoshuang, E-mail: xschen@mail.sitp.ac.cn; Lu, Wei [National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu Tian Road, Shanghai 200083 (China); Liao, Lei [Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072 (China)

    2014-05-14T23:59:59.000Z

    An HgCdTe long-wavelength infrared focal plane array photodetector is proposed by modulating light distributions based on the photonic crystal. It is shown that a promising prospect of improving performance is better light harvest and dark current limitation. To optimize the photon field distributions of the HgCdTe-based photonic crystal structure, a numerical method is built by combining the finite-element modeling and the finite-difference time-domain simulation. The optical and electrical characteristics of designed HgCdTe mid-wavelength and long-wavelength photon-trapping infrared detector focal plane arrays are obtained numerically. The results indicate that the photon crystal structure, which is entirely compatible with the large infrared focal plane arrays, can significantly reduce the dark current without degrading the quantum efficiency compared to the regular mesa or planar structure.

  4. Novel signal inversion of laser beam induced current for femtosecond-laser-drilling-induced junction on vacancy-doped p-type HgCdTe

    SciTech Connect (OSTI)

    Qiu, W. C.; Wang, R.; Xu, Z. J.; Jiang, T. [College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073 (China); Cheng, X. A., E-mail: xiang-ai-cheng@126.com [College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073 (China); State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha, Hunan 410073 (China); Science and Technology on Electro-Optical Information Security Control Laboratory, Hebei 065201 (China)

    2014-05-28T23:59:59.000Z

    In this paper, experimental results of temperature-dependent signal inversion of laser beam induced current (LBIC) for femtosecond-laser-drilling-induced junction on vacancy-doped p-type HgCdTe are reported. LBIC characterization shows that the traps induced by femtosecond laser drilling are sensitive to temperature. Theoretical models for trap-related p-n junction transformation are proposed and demonstrated using numerical simulations. The simulations are in good agreement with the experimental results. The effects of traps and mixed conduction are possibly the main reasons that result in the novel signal inversion of LBIC microscope at room temperature. The research results provide a theoretical guide for practical applications of large-scale array HgCdTe infrared photovoltaic detectors formed by femtosecond laser drilling, which may act as a potential new method for fabricating HgCdTe photodiodes.

  5. Vibrational Spectroscopy of Mass-Selected [UO2(ligand)n]2+ Complexes in the Gas Phase: Comparison with Theory

    SciTech Connect (OSTI)

    Gary S. Groenewold; Anita K. Gianotto

    2006-03-01T23:59:59.000Z

    The gas-phase infrared spectra of discrete uranyl ([UO2]2+) complexes ligated with acetone and/or acetonitrile were used to evaluate systematic trends of ligation on the position of the OdUdO stretch and to enable rigorous comparison with the results of computational studies. Ionic uranyl complexes isolated in a Fourier transform ion cyclotron resonance mass spectrometer were fragmented via infrared multiphoton dissociation using a free electron laser scanned over the mid-IR wavelengths. The asymmetric OdUdO stretching frequency was measured at 1017 cm-1 for [UO2(CH3COCH3)2]2+ and was systematically red shifted to 1000 and 988 cm-1 by the addition of a third and fourth acetone ligand, respectively, which was consistent with increased donation of electron density to the uranium center in complexes with higher coordination number. The values generated computationally using LDA, B3LYP, and ZORA-PW91 were in good agreement with experimental measurements. In contrast to the uranyl frequency shifts, the carbonyl frequencies of the acetone ligands were progressively blue shifted as the number of ligands increased from two to four and approached that of free acetone. This observation was consistent with the formation of weaker noncovalent bonds between uranium and the carbonyl oxygen as the extent of ligation increases. Similar trends were observed for [UO2(CH3CN)n]2+ complexes, although the uranyl asymmetric stretching frequencies were greater than those measured for acetone complexes having equivalent coordination, which is consistent with the fact that acetonitrile is a weaker nucleophile than is acetone. This conclusion was confirmed by the uranyl stretching frequencies measured for mixed acetone/acetonitrile complexes, which showed that substitution of one acetone for one acetonitrile produced a modest red shift of 3-6 cm-1.

  6. Scientific uncertainties in atmospheric mercury models III: Boundary and initial conditions, model grid resolution, and Hg(II) reduction mechanism

    SciTech Connect (OSTI)

    Lin, Che-Jen [ORNL; Pongprueksa, Pruek [Lamar University; Lindberg, Steven Eric [ORNL; Jang, Carey [U.S. Environmental Protection Agency, Raleigh, North Carolina; Braverman, Thomas [U.S. Environmental Protection Agency, Raleigh, North Carolina; Bullock, Russell O [NOAA; Ho, Thomas [ORNL; Chu, Hsing-Wei [Lamar University

    2008-03-01T23:59:59.000Z

    In this study, the model response in terms of simulated mercury concentration and deposition to boundary condition (BC), initial condition (IC), model grid resolution (12 km versus 36 km), and two alternative Hg(II) reduction mechanisms, was investigated. The model response to the change of gaseous elemental mercury (GEM) concentration from 0 to 2 ngm3 in IC/BC is found to be very linear (r240.99) based on the results of sensitivity simulations in July 2001. An increase of 1 ngm3 of GEM in BC resulted in an increase of 0.81 ngm3 in the monthly average of total mercury concentration, and 1270 ngm2 in the monthly total deposition. IC has similar but weaker effects compared to those of BC. An increase of 1 ngm3 of GEM in IC resulted in an increase of 0.14 ngm3 in the monthly average of total mercury concentration, and 250 ngm2 in the monthly total deposition. Varying reactive gaseous mercury (RGM) or particulate mercury (PHg) in BC/IC has much less significant impact. Simulation results at different grid resolutions show good agreement (slope 0.950 1.026, r 0.816 0.973) in mercury concentration, dry deposition, and total deposition. The agreement in wet deposition is somewhat weaker (slope 0.770 0.794, r 0.685 0.892) due to the difference in emission dilution and simulated precipitation that subsequently change reaction rates in the aqueous phase. Replacing the aqueous Hg(II)-HO2 reduction by either RGM reduction by CO (51018cm3 molecule1 s1) or photoreduction of RGM (1105 s1) gives significantly better model agreement with the wet deposition measured by Mercury Deposition Network (MDN). Possible ranges of the reduction rates are estimated based on model sensitivity results. The kinetic estimate requires further verification by laboratory studies.

  7. Sulfurization of a carbon surface for vapor phase mercury removal II: Sulfur forms and mercury uptake

    E-Print Network [OSTI]

    Borguet, Eric

    promote the formation of organic sulfur and the presence of H2S during the cooling process increased in the presence of H2S was very effective towards Hg uptake in nitrogen. Corre- lation of mercury uptake capacitySulfurization of a carbon surface for vapor phase mercury removal ­ II: Sulfur forms and mercury

  8. Off-shell Invariant D=N=2 Twisted Super Yang-Mills Theory with a Gauged Central Charge without Constraints

    E-Print Network [OSTI]

    Asaka, Keisuke; Kawamoto, Noboru; Miyake, Akiko

    2013-01-01T23:59:59.000Z

    We formulate N=2 twisted super Yang-Mills theory with a gauged central charge by superconnection formalism in two dimensions. We obtain off-shell invariant supermultiplets and actions with and without constraints, which is in contrast with the off-shell invariant D=N=4 super Yang-Mills formulation with unavoidable constraints.

  9. Off-shell Invariant D=N=2 Twisted Super Yang-Mills Theory with a Gauged Central Charge without Constraints

    E-Print Network [OSTI]

    Keisuke Asaka; Junji Kato; Noboru Kawamoto; Akiko Miyake

    2013-09-18T23:59:59.000Z

    We formulate N=2 twisted super Yang-Mills theory with a gauged central charge by superconnection formalism in two dimensions. We obtain off-shell invariant supermultiplets and actions with and without constraints, which is in contrast with the off-shell invariant D=N=4 super Yang-Mills formulation with unavoidable constraints.

  10. Optical Nonlinearity in Ar and N2 near the Ionization Threshold J. K. Wahlstrand, Y.-H. Cheng, Y.-H. Chen, and H. M. Milchberg

    E-Print Network [OSTI]

    Milchberg, Howard

    Optical Nonlinearity in Ar and N2 near the Ionization Threshold J. K. Wahlstrand, Y.-H. Cheng, Y measure the nonlinear optical response in argon and nitrogen in a thin gas target to laser intensities.103901 PACS numbers: 42.65.An, 42.65.Jx, 42.65.Re The optical Kerr effect, the intensity-dependent refrac

  11. A Tungsten(VI) Nitride Having a W2(-N)2 Core Zachary J. Tonzetich, Richard R. Schrock,* Keith M. Wampler, Brad C. Bailey,

    E-Print Network [OSTI]

    Müller, Peter

    A Tungsten(VI) Nitride Having a W2(µ-N)2 Core Zachary J. Tonzetich, Richard R. Schrock,* Keith M-331, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Received September 27, 2007 The tungsten that the tungsten alkylidyne species W(C-t-Bu)(CH2-t-Bu)(OAr)2 (Ar ) 2,6-diisopropylphenyl) can be prepared readily

  12. King Air flight RICO 2004/12/13 page 1 King Air N2UW flight report for December 13, 2004

    E-Print Network [OSTI]

    Vali, Gabor

    repair of the air conditioner on the aircraft, a test flight was needed and was to be transformedKing Air flight ­ RICO ­ 2004/12/13 page 1 King Air N2UW flight report for December 13, 2004 Crew: Drew, Vali, Oolman, Glover After

  13. SNS Target Test Facility: Prototype Hg Operations and Remote Handling Tests P. T. Spampinato, T. W. Burgess, J. B. Chesser, V. B. Graves, and S.L. Schrock

    E-Print Network [OSTI]

    McDonald, Kirk

    SNS Target Test Facility: Prototype Hg Operations and Remote Handling Tests P. T. Spampinato, T. W remote handling techniques and tools for replacing target system components. During the past year and analytical data. These included a welded-tube heat exchanger, an electromagnetic flow meter, a hydraulically

  14. 15N2 formation and fast oxygen isotope exchange during pulsed 15N18O exposure of MnOx/CeO2

    SciTech Connect (OSTI)

    Kwak, Ja Hun; Szanyi, Janos

    2014-12-23T23:59:59.000Z

    Pulsing 15N18O onto an annealed 1% Mn16Ox/Ce16O2 catalyst resulted in very fast oxygen isotope exchange and 15N2 formation at 295 K. In the 1st 15N18O pulse, due to the presence of large number of surface oxygen defects, extensive 15N218O and 15N2 formations were observed. In subsequent pulses oxygen isotope exchange dominated as a result of highly labile oxygen in the oxide. We gratefully acknowledge the US Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy/Vehicle Technologies Program for the support of this work. The research described in this paper was performed at the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the DOE’s Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory (PNNL). PNNL is operated for the US DOE by Battelle.

  15. Multielectron effects in high harmonic generation in N_2 and benzene: simulation using a non-adiabatic quantum molecular dynamics approach for laser-molecule interactions

    E-Print Network [OSTI]

    Dundas, Daniel

    2012-01-01T23:59:59.000Z

    A mixed quantum-classical approach is introduced which allows the dynamically response of molecules driven far from equilibrium to be modeled. This method is applied here to the interaction of molecules with intense, short-duration laser pulses. The electronic response of the molecule is described using time-dependent density functional theory (TDDFT) and the resulting Kohn-Sham equations are solved numerically using finite difference techniques in conjunction with local and global adaptations of an underlying grid in curvilinear coordinates. Using this approach, simulations can be carried out for a wide range of molecules and both all-electron and pseudopotential calculations can be performed. The approach is applied to the study of high harmonic generation in N_2 and benzene using linearly-polarized laser pulses and to the best of our knowledge, the results for benzene represent the first TDDFT calculations of high harmonic generation in benzene using linearly polarized laser pulses. For N_2 an enhancement ...

  16. 207Pb(n,2n{gamma})206Pb Cross-Section Measurements by In-Beam Gamma-Ray Spectroscopy

    SciTech Connect (OSTI)

    Baumann, P.; Kerveno, M.; Rudolf, G. [IReS, IN2P3, Strasbourg (France); Borcea, C. [EC, JRC, IRMM, Geel (Belgium); NIPNE, Bucarest (Romania); Jericha, E. [Technische Universitaet Wien, Wien (Austria); Jokic, S. [INN Vinca, Belgrade (Serbia and Montenegro); Lukic, S. [IReS, IN2P3, Strasbourg (France); INN Vinca, Belgrade (Serbia and Montenegro); Mihailescu, L. C.; Plompen, A. J. M. [EC, JRC, IRMM, Geel (Belgium); Pavlik, A. [Universitaet Wien, Vienna (Austria)

    2006-03-13T23:59:59.000Z

    207Pb(n,2n{gamma})206Pb cross section were measured for incident neutron energies between 6 and 20 MeV with the white neutron beam produced at GELINA. The {gamma}-ray production cross section for the main transition (803 keV, 2+{yields} 0+) in 206Pb is compared to results obtained at Los Alamos and to the TALYS and EMPIRE-II code predictions.

  17. Powerplant Technology Problem 3-2: Fuel oils generally are a mix of components such as CnH2n+2 (see Table 4-4

    E-Print Network [OSTI]

    Table 4-4 on page 147); to convert from a mass-analysis to moles-per-pound-of-fuel, we need to introduce.499N2 (a.) The total of 0.666 lbmole of gas produced by this combustion of one lbm of fuel, includes condensation if the temperature dropped to or below 135.6o F. (b.) The amount of sulfurous acid produced from

  18. MaterialsMaterials Doped ceria supports

    E-Print Network [OSTI]

    Azad, Abdul-Majeed

    Shimadzu GC Desulfurization protocolDesulfurization protocol Up to 1000 ppm H2S in N2 at 450-825°C is typically in the range 0.3-1%. If left uncaptured, it leads to the formation of H2S which is detrimental of a bi-metal catalyst (2G) after exposure to 1000 ppm H2S at 825°C/4h. SEM picture of the support (top

  19. Microbial Biogeochemistry Chemical reactions occurring in the environment mediated by microbial communities

    E-Print Network [OSTI]

    Vallino, Joseph J.

    biogeochemistry. · Lab work #12;Energy Source Light (Phototrophs) PS I: anaerobic, H2S PS I+II: aerobic, H2O Sulfur bacteria Green S bacteria Desulfovibrio Clostridium O2H2S Conc. Chemoorganoheterotrophy- H2O NO3 - + 6H+ + 5e- ½N2 + 3H2O Electron Tower (at pH 7) SO4 2- + 10H+ + 8e- H2S + 4H2O NO3 - + 2

  20. Yrast structure of the two-proton- and three-neutron-hole nucleus {sup 203}Hg from the decay of a 53/2{sup +} isomer

    SciTech Connect (OSTI)

    Szpak, B.; Maier, K. H.; Fornal, B.; Broda, R.; Cieplicka, N.; Krolas, W.; Pawlat, T.; Wrzesinski, J. [Niewodniczanski Institute of Nuclear Physics PAN, Krakow (Poland); Smolkowska, A. S. [Niewodniczanski Institute of Nuclear Physics PAN, Krakow (Poland); Gdansk University of Technology, Gdansk (Poland); Carpenter, M. P.; Janssens, R. V. F.; Zhu, S. [Argonne National Laboratory, Argonne, Illinois 60439 (United States)

    2011-06-15T23:59:59.000Z

    The decay of a new, 53/2{sup +}, isomer at 8281 keV in {sup 203}Hg has been studied by {gamma} coincidence spectroscopy. A half-life of 146(30) ns was measured. In addition, another isomeric, 39/2{sup +}, level with a half-life of 7.8(1.5) ns was observed. Some elements of the Rydstroem shell-model interaction have been adjusted to reproduce level energies in nuclei with two to four holes in the {sup 208}Pb core. With this interaction, the new states in the five-hole nucleus {sup 203}Hg are reproduced with an rms error of 105 keV.

  1. WRF-Chem model predictions of the regional impacts of N2O5 heterogeneous processes on night-time chemistry over north-western Europe

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

    Lowe, Douglas; Archer-Nicholls, Scott; Morgan, Will; Allan, James D.; Utembe, Steve; Ouyang, Bin; Aruffo, Eleonora; Le Breton, Michael; Zaveri, Rahul A.; di Carlo, Piero; et al

    2015-01-01T23:59:59.000Z

    Chemical modelling studies have been conducted over north-western Europe in summer conditions, showing that night-time dinitrogen pentoxide (N2O5) heterogeneous reactive uptake is important regionally in modulating particulate nitrate and has a~modest influence on oxidative chemistry. Results from Weather Research and Forecasting model with Chemistry (WRF-Chem) model simulations, run with a detailed volatile organic compound (VOC) gas-phase chemistry scheme and the Model for Simulating Aerosol Interactions and Chemistry (MOSAIC) sectional aerosol scheme, were compared with a series of airborne gas and particulate measurements made over the UK in July 2010. Modelled mixing ratios of key gas-phase species were reasonably accurate (correlationsmore »with measurements of 0.7–0.9 for NO2 and O3). However modelled loadings of particulate species were less accurate (correlation with measurements for particulate sulfate and ammonium were between 0.0 and 0.6). Sulfate mass loadings were particularly low (modelled means of 0.5–0.7 ?g kg?1air, compared with measurements of 1.0–1.5 ?g kg?1air). Two flights from the campaign were used as test cases – one with low relative humidity (RH) (60–70%), the other with high RH (80–90%). N2O5 heterogeneous chemistry was found to not be important in the low-RH test case; but in the high-RH test case it had a strong effect and significantly improved the agreement between modelled and measured NO3 and N2O5. When the model failed to capture atmospheric RH correctly, the modelled NO3 and N2O5 mixing ratios for these flights differed significantly from the measurements. This demonstrates that, for regional modelling which involves heterogeneous processes, it is essential to capture the ambient temperature and water vapour profiles. The night-time NO3 oxidation of VOCs across the whole region was found to be 100–300 times slower than the daytime OH oxidation of these compounds. The difference in contribution was less for alkenes (× 80) and comparable for dimethylsulfide (DMS). However the suppression of NO3 mixing ratios across the domain by N2O5 heterogeneous chemistry has only a very slight, negative, influence on this oxidative capacity. The influence on regional particulate nitrate mass loadings is stronger. Night-time N2O5 heterogeneous chemistry maintains the production of particulate nitrate within polluted regions: when this process is taken into consideration, the daytime peak (for the 95th percentile) of PM10 nitrate mass loadings remains around 5.6 ?g kg?1air, but the night-time minimum increases from 3.5 to 4.6 ?g kg?1air. The sustaining of higher particulate mass loadings through the night by this process improves model skill at matching measured aerosol nitrate diurnal cycles and will negatively impact on regional air quality, requiring this process to be included in regional models.« less

  2. UBC Centre for Blood Research: Fermentation Suite Brom A5 (F4) PDF.xls: FermentationProfile Air O2 rpm N2 Base Acid

    E-Print Network [OSTI]

    Strynadka, Natalie

    UBC Centre for Blood Research: Fermentation Suite Brom A5 (F4) PDF.xls: FermentationProfile Air O2 rpm N2 Base Acid NH4OH Acetic Acid 8.6 16.0 Configuration 1 SP 4 - - - SP - 2 SP 3 0.000 Temp (oC) dO2 Fermentation (Hrs) pH rpm Temp Do OD CK (mg/50-L) MeOH (ml) dO2 (%)Temp (C) 40 20 60 80 0 100 6 8 4 2 0 10 28

  3. A Planned Neck Dissection Is Not Necessary in All Patients With N2-3 Head-and-Neck Cancer After Sequential Chemoradiotherapy

    SciTech Connect (OSTI)

    Soltys, Scott G., E-mail: sgsoltys@stanford.edu [Department of Radiation Oncology, Stanford University Medical Center, Stanford, CA (United States); Choi, Clara Y.H. [Department of Neurosugery, Stanford University Medical Center, Stanford, CA (United States); Fee, Willard E. [Department of Otolaryngology, Stanford University Medical Center, Stanford, CA (United States); Pinto, Harlan A. [Department of Medical Oncology, Stanford University Medical Center, Stanford, CA (United States); Veterans Affairs, Palo Alto Health Care System, Palo Alto, CA (United States); Le, Quynh-Thu [Department of Radiation Oncology, Stanford University Medical Center, Stanford, CA (United States)

    2012-07-01T23:59:59.000Z

    Purpose: To assess the role of a planned neck dissection (PND) after sequential chemoradiotherapy for patients with head-and-neck cancer with N2-N3 nodal disease. Methods and Materials: We reviewed 90 patients with N2-N3 head-and-neck squamous cell carcinoma treated between 1991 and 2001 on two sequential chemoradiotherapy protocols. All patients received induction and concurrent chemotherapy with cisplatin and 5-fluorocuracil, with or without tirapazamine. Patients with less than a clinical complete response (cCR) in the neck proceeded to a PND after chemoradiation. The primary endpoint was nodal response. Clinical outcomes and patterns of failure were analyzed. Results: The median follow-up durations for living and all patients were 8.3 years (range, 1.5-16.3 year) and 5.4 years (range, 0.6-16.3 years), respectively. Of the 48 patients with nodal cCR whose necks were observed, 5 patients had neck failures as a component of their recurrence [neck and primary (n = 2); neck, primary, and distant (n = 1); neck only (n = 1); neck and distant (n = 1)]. Therefore, PND may have benefited only 2 patients (4%) [neck only failure (n = 1); neck and distant failure (n = 1)]. The pathologic complete response (pCR) rate for those with a clinical partial response (cPR) undergoing PND (n = 30) was 53%. The 5-year neck control rates after cCR, cPR{yields}pCR, and cPR{yields}pPR were 90%, 93%, and 78%, respectively (p = 0.36). The 5-year disease-free survival rates for the cCR, cPR{yields}pCR, and cPR{yields}pPR groups were 53%, 75%, and 42%, respectively (p = 0.04). Conclusion: In our series, patients with N2-N3 neck disease achieving a cCR in the neck, PND would have benefited only 4% and, therefore, is not recommended. Patients with a cPR should be treated with PND. Residual tumor in the PND specimens was associated with poor outcomes; therefore, aggressive therapy is recommended. Studies using novel imaging modalities are needed to better assess treatment response.

  4. Nanomaterials DOI: 10.1002/anie.201105324

    E-Print Network [OSTI]

    Frenkel, Anatoly

    of the vapor and its condensation into Re-doped MoO3�y nanoparticles. The resulting NP react with H2/H2S gas a long (25­35 h) annealing process at 8708C in the presence of H2S and forming gas (H2 10 wt%; N2

  5. Laser photolysis, infrared fluorescence determination of CH3(nu3) vibrational deactivation by He, Ar, N2, CO, SF6, and (CH3)2CO

    SciTech Connect (OSTI)

    Donaldson, D.J.; Leone, S.R.

    1987-06-04T23:59:59.000Z

    Room temperature vibrational deactivation rate constants are reported for methyl radicals with antisymmetric stretch excitation, CH3(nu3) + M CH3 + M, where M = He, Ar, N2, CO, SF6, (CH3)2CO. Excimer laser photolysis of acetone at 193 nm is used to populate CH3(nu3), and time-resolved infrared emission from the CH stretch is used to follow the deactivation kinetics. The rate constants obtained are (+/-2sigma) (2.6 +/- 0.5) x 10 T (He, (6.8 +/- 0.7) x 10 T (Ar), (6.1 +/- 0.6) x 10 T (N2), (3.6 +/- 0.7) x 10 T (CO), (6.9 +/- 0.7) x 10 T (SF6), and (8.1 +/- 0.9) x 10 S (CH3COCH3) in units of cmT molecule s . The deactivation probability is not controlled by long-range forces due to the lone electron on the radical, but rather by the probabilities for intramode vibrational energy flow in CH3.

  6. Hg and Se capture and fly ash carbons from combustion of complex pulverized feed blends mainly of anthracitic coal rank in Spanish power plants

    SciTech Connect (OSTI)

    I. Surez-Ruiz; J.C. Hower; G.A. Thomas [Instituto Nacional del Carbon (INCAR-CSIC), Oviedo (Spain)

    2007-01-15T23:59:59.000Z

    In this work, the petrology and chemistry of fly ashes produced in a Spanish power plant from the combustion of complex pulverized feed blends made up of anthracitic/meta-anthracitic coals, petroleum, and natural coke are investigated. It was found that the behavior of fly ash carbons derived from anthracitic coals follows relatively similar patterns to those established for the carbons from the combustion of bituminous coals. Fly ashes were sampled in eight hoppers from two electrostatic precipitator (ESP) rows. The characterization of the raw ashes and their five sieved fractions (from {gt}150 to {lt}25 {mu}m) showed that glassy material, quartz, oxides, and spinels in different proportions are the main inorganic components. As for the organic fraction, the dominant fly ash carbons are anisotropic carbons, mainly unburned carbons derived from anthracitic vitrinite. The concentration of Se and Hg increased in ashes of the second ESP row, this increase being related to the higher proportion of anisotropic unburned carbons, particularly those largely derived from anthracitic vitrinite in the cooler ashes of the ESP (second row) and also related to the decrease in the flue gas temperature. This suggests that the flue gas temperature plays a major role in the concentration of mercury for similar ratios of unburned carbons. It was also found that Hg is highly concentrated in the medium-coarser fractions of the fly ashes ({gt} 45 {mu}m), there being a positive relationship between the amount of these carbons, which are apparently little modified during the combustion process, in the medium-coarse fractions of the ashes and the Hg retention. According to the results obtained, further research on this type of fly ash could be highly productive. 28 refs., 10 figs., 8 tabs.

  7. components of the droplet stream in the first regime before,during, and after the impact. The energy audit shows thatthe change in trandiameter dropllo theleiee smpo ohat modes (i.e. n [ 2) decay quickly, leaving the dominant

    E-Print Network [OSTI]

    Jones, Thomas B.

    . The energy audit shows thatthe change in trandiameter dropllo theleiee smpo ohat #12;#12;modes (i.e. n [ 2) at the University of Rochester also contributed financially. A. Tucker-Schwartz of UCLA suggested use of the HDFT

  8. Method of controlling the mercury vapor pressure in a photo-chemical lamp or vapor filter used for Hg.sup.196 enrichment

    DOE Patents [OSTI]

    Grossman, Mark W. (Belmont, MA)

    1993-01-01T23:59:59.000Z

    The present invention is directed to a method of eliminating the cold spot zones presently used on Hg.sup.196 isotope separation lamps and filters by the use of a mercury amalgams, preferably mercury - indium amalgams. The use of an amalgam affords optimization of the mercury density in the lamp and filter of a mercury enrichment reactor, particularly multilamp enrichment reactors. Moreover, the use of an amalgam in such lamps and/or filters affords the ability to control the spectral line width of radiation emitted from lamps, a requirement for mercury enrichment.

  9. Method of controlling the mercury vapor pressure in a photo-chemical lamp or vapor filter used for Hg[sup 196] enrichment

    DOE Patents [OSTI]

    Grossman, M.W.

    1993-02-16T23:59:59.000Z

    The present invention is directed to a method of eliminating the cold spot zones presently used on Hg[sup 196] isotope separation lamps and filters by the use of a mercury amalgams, preferably mercury - indium amalgams. The use of an amalgam affords optimization of the mercury density in the lamp and filter of a mercury enrichment reactor, particularly multilamp enrichment reactors. Moreover, the use of an amalgam in such lamps and/or filters affords the ability to control the spectral line width of radiation emitted from lamps, a requirement for mercury enrichment.

  10. Heat capacity of Cu 2 (C 5 H 12 N 2 ) 2 Cl 4 in a magnetic eld Masayuki Hagiwara a;1 , Hiroko Aruga Katori a , Uli Schollwock b , Hans-Jurgen Mikeska c

    E-Print Network [OSTI]

    Kersting, Roland

    structure in a gapless spin liquid system. Keywords: heat capacity; spin-ladder; Cu 2 (C5H12N2 ) 2 Cl4Heat capacity of Cu 2 (C 5 H 12 N 2 ) 2 Cl 4 in a magnetic #12;eld Masayuki Hagiwara a;1 , Hiroko, D- 30167 Hannover, Germany Abstract Heat capacity measurements down to 0.5 K in a magnetic #12;eld

  11. Anode-cathode voltage drop of a rotating arc in an auto-expansion circuit-breaker filled with SF6-N2 mixtures

    SciTech Connect (OSTI)

    Beauvois, V.; Legros, W.; Scarpa, P. [Inst. Montefiore, Liege (Belgium)] [and others

    1995-12-31T23:59:59.000Z

    In auto-expansion circuit-breakers, the power dissipated by the arc itself heats the surrounding gas, inducing a pressure build up in the {open_quotes}upstream volume{close_quotes} and giving rise to a gas flow which blows the extinguishing arc. Moreover, in the studied apparatus, a magnetic field, due to the current flowing in a coil, provides arc radial stability and leads to arc rotation which efficiently reduces electrode erosion. In such a circuit-breaker, it is obvious that arc-gas and arc-electrode interactions are essential and govern. the energy balance in the plasma region. This paper deals more specifically with the phenomena occurring at the arc-electrode interfaces. It relates results of experiments carried out to determine the anode-cathode voltage drop when the apparatus is filled with different SF6-N2 mixtures.

  12. Neutron scattering evidence for isolated spin-1/2 ladders in (C5D12N)2CuBr4

    SciTech Connect (OSTI)

    Savici, Andrei T [ORNL; Granroth, Garrett E [ORNL; Broholm, Collin L [ORNL; Pajerowski, Daniel M. [University of Florida, Gainesville; Brown, Craig [National Institute of Standards and Technology (NIST); Talham, Daniel R. [University of Florida, Gainesville; Meisel, Mark W. [University of Florida, Gainesville; Schmidt, K. P. [Technische Universit Dortmund, Germany; Uhrig, G. S. [Technische Universit Dortmund, Germany; Nagler, Stephen E [ORNL

    2009-01-01T23:59:59.000Z

    Inelastic neutron scattering was used to determine the spin Hamiltonian for the singlet ground state system (C5D12N)2CuBr4 (BPCB). A 2-leg spin 1/2 ladder model, with J? = 1:084 0:005 meV and Jk = 0:321 0:008 meV, accurately describes the data. The experimental limit on the inter-ladder exchange constant is jJ0j 0.005 meV, and the limit on diagonal, intra-ladder exchange is jJF j 0.1 meV. The experimental ratios of intra-ladder bond energies are consistent with the predictions of continuous unitary transformations calculations.

  13. Faddeev-Senjanovic Quantization of SU(n) N=2 Supersymmetric Gauge Field System with Non-Abelian Chern-Simons Topological Term and Its Fractional Spin

    E-Print Network [OSTI]

    Yong-Chang Huang; Qiu-Hong Huo

    2009-01-13T23:59:59.000Z

    Using Faddeev-Senjanovic path integral quantization for constrained Hamilton system, we quantize SU(n) N=2 supersymmetric gauge field system with non-abelian Chern-Simons topological term in 2+1 dimensions, and use consistency of a gauge condition naturally to deduce another gauge condition. Further, we get the generating functional of Green function in phase space, deduce the angular momentum based on the global canonical Noether theorem at quantum level, obtain the fractional spin of this supersymmetric system, and show that the total angular momentum has the orbital angular momentum and spin angular momentum of the non-abelian gauge field. Finally, we find out the anomalous fractional spin and discover that the fractional spin has the contributions of both the group superscript components and the A_0^s (x) charge.

  14. Numerical modeling of injection and mineral trapping of CO2 with H2S and SO2 in a Sandstone Formation

    E-Print Network [OSTI]

    Xu, Tianfu; Apps, John A.; Pruess, Karsten; Yamamoto, Hajime

    2008-01-01T23:59:59.000Z

    using the same kinetic expression as for dissolution. Recentusing the same kinetic expression as that for dissolution.parameters used for the kinetic rate expression are given in

  15. Numerical modeling of injection and mineral trapping of CO2 withH2S and SO2 in a Sandstone Formation

    SciTech Connect (OSTI)

    Xu, Tianfu; Apps, John A.; Pruess, Karsten; Yamamoto, Hajime

    2004-09-07T23:59:59.000Z

    Carbon dioxide (CO{sub 2}) injection into deep geologic formations could decrease the atmospheric accumulation of this gas from anthropogenic sources. Furthermore, by co-injecting H{sub 2}S or SO{sub 2}, the products respectively of coal gasification or combustion, with captured CO{sub 2}, problems associated with surface disposal would be mitigated. We developed models that simulate the co-injection of H{sub 2}S or SO{sub 2} with CO{sub 2} into an arkose formation at a depth of about 2 km and 75 C. The hydrogeology and mineralogy of the injected formation are typical of those encountered in Gulf Coast aquifers of the United States. Six numerical simulations of a simplified 1-D radial region surrounding the injection well were performed. The injection of CO{sub 2} alone or co-injection with SO{sub 2} or H{sub 2}S results in a concentrically zoned distribution of secondary minerals surrounding a leached and acidified region adjacent to the injection well. Co-injection of SO{sub 2} with CO{sub 2} results in a larger and more strongly acidified zone, and alteration differs substantially from that caused by the co-injection of H{sub 2}S or injection of CO{sub 2} alone. Precipitation of carbonates occurs within a higher pH (pH > 5) peripheral zone. Significant quantities of CO{sub 2} are sequestered by ankerite, dawsonite, and lesser siderite. The CO{sub 2} mineral-trapping capacity of the formation can attain 40-50 kg/m{sup 3} medium for the selected arkose. In contrast, secondary sulfates precipitate at lower pH (pH < 5) within the acidified zone. Most of the injected SO{sub 2} is transformed and immobilized through alunite precipitation with lesser amounts of anhydrite and minor quantities of pyrite. The dissolved CO{sub 2} increases with time (enhanced solubility trapping). The mineral alteration induced by injection of CO{sub 2} with either SO{sub 2} or H{sub 2}S leads to corresponding changes in porosity. Significant increases in porosity occur in the acidified zones where mineral dissolution dominates. With co-injection of SO{sub 2}, the porosity increases from an initial 0.3 to 0.43 after 100 years. However, within the CO{sub 2} mineral-trapping zone, the porosity decreases to about 0.28 for both cases, because of the addition of CO{sub 2} mass as secondary carbonates to the rock matrix. Precipitation of sulfates at the acidification front causes porosity to decrease to 0.23. The limited information currently available on the mineralogy of naturally occurring high-pressure CO{sub 2} reservoirs is generally consistent with our simulations.

  16. Elevated-Temperature Corrosion of CoCrCuFeNiAl0.5Bx High-Entropy Alloys in Simulated Syngas Containing H2S

    SciTech Connect (OSTI)

    Dogan, Omer N.; Nielsen, Benjamin C.; Hawk, Jeffrey A.

    2013-08-01T23:59:59.000Z

    High-entropy alloys are formed by synthesizing five or more principal elements in equimolar or near equimolar concentrations. Microstructure of the CoCrCuFeNiAl{sub 0.5}B{sub x} (x = 0, 0.2, 0.6, 1) high-entropy alloys under investigation is composed of a mixture of disordered bcc and fcc phases and borides. These alloys were tested gravimetrically for their corrosion resistance in simulated syngas containing 0, 0.01, 0.1, and 1 % H{sub 2}S at 500 °C. The exposed coupons were characterized using XRD and SEM. No significant corrosion was detected at 500 °C in syngas containing 0 and 0.01 % H{sub 2}S while significant corrosion was observed in syngas containing 0.1 and 1 % H{sub 2}S. Cu{sub 1.96}S was the primary sulfide in the external corrosion scale on the low-boron high-entropy alloys, whereas FeCo{sub 4}Ni{sub 4}S{sub 8} on the high-boron high-entropy alloys. Multi-phase Cu-rich regions in the low-B high-entropy alloys were vulnerable to corrosive attack.

  17. Air Pollution Grant Ideas Possible air pollutants to study: SO2, H2S, NO2, NH3, CO, CO2, O3.

    E-Print Network [OSTI]

    Short, Daniel

    equipment for RMU for checking reliability of tube technique. Chemicals and glassware required for kit emissions from cars, trucks and buses, power plants, and off-road equipment. In addition to contributing in nature that combines Engineering, Math and Science ideas. Utilize manufacturing equipment to produce 100

  18. Numerical modeling of injection and mineral trapping of CO2 with H2S and SO2 in a Sandstone Formation

    E-Print Network [OSTI]

    Xu, Tianfu; Apps, John A.; Pruess, Karsten; Yamamoto, Hajime

    2008-01-01T23:59:59.000Z

    Australia. Am. Assoc. Petrol. Geol. Bull. 76(8), 1224-1249.modeling. Mineral. and Petrol. 59, 121-140. Gunter, W.D. ,

  19. Terrestrial Planet Atmospheres. The Moon's Sodium Atmosphere

    E-Print Network [OSTI]

    Walter, Frederick M.

    ;Origins of Atmospheres · Outgassing ­ Volcanoes expel water, CO2, N2, H2S, SO2 removed by the Fme convecFon reaches deserts #12;Water and Ice Clouds #12;H2SO4

  20. Interfacial tension of nonassociating pure substances and binary mixtures by density functional theory combined with PengRobinson equation

    E-Print Network [OSTI]

    Firoozabadi, Abbas

    representa- tion of various intermolecular interactions e.g., short-range repulsions, van der Waals- ing of hydrocarbons, N2, CO2, H2S, and sometimes water, DFT at the current stage only exhibits very

  1. Near-Zero Emissions Oxy-Combustion Flue Gas Purification Task 2: SOx/Nox/Hg Removal for High Sulfur Coal

    SciTech Connect (OSTI)

    Nick Degenstein; Minish Shah; Doughlas Louie

    2012-05-01T23:59:59.000Z

    The goal of this project is to develop a near-zero emissions flue gas purification technology for existing PC (pulverized coal) power plants that are retrofitted with oxy-combustion technology. The objective of Task 2 of this project was to evaluate an alternative method of SOx, NOx and Hg removal from flue gas produced by burning high sulfur coal in oxy-combustion power plants. The goal of the program was not only to investigate a new method of flue gas purification but also to produce useful acid byproduct streams as an alternative to using a traditional FGD and SCR for flue gas processing. During the project two main constraints were identified that limit the ability of the process to achieve project goals. 1) Due to boiler island corrosion issues >60% of the sulfur must be removed in the boiler island with the use of an FGD. 2) A suitable method could not be found to remove NOx from the concentrated sulfuric acid product, which limits sale-ability of the acid, as well as the NOx removal efficiency of the process. Given the complexity and safety issues inherent in the cycle it is concluded that the acid product would not be directly saleable and, in this case, other flue gas purification schemes are better suited for SOx/NOx/Hg control when burning high sulfur coal, e.g. this project's Task 3 process or a traditional FGD and SCR.

  2. Temporal Nodal Regression and Regional Control After Primary Radiation Therapy for N2-N3 Head-and-Neck Cancer Stratified by HPV Status

    SciTech Connect (OSTI)

    Huang, Shao Hui; O'Sullivan, Brian [Department of Radiation Oncology, Princess Margaret Cancer Centre/University of Toronto, Toronto, Ontario (Canada); Xu, Wei; Zhao, Helen [Department of Biostatistics, Princess Margaret Cancer Centre/University of Toronto, Toronto, Ontario (Canada); Chen, Duo-duo [Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, Ontario (Canada); Ringash, Jolie; Hope, Andrew [Department of Radiation Oncology, Princess Margaret Cancer Centre/University of Toronto, Toronto, Ontario (Canada); Razak, Albiruni [Division of Medical Oncology, Princess Margaret Cancer Centre, Toronto, Ontario (Canada); Gilbert, Ralph; Irish, Jonathan [Department of Otolaryngology-Head and Neck Surgery/Surgical Oncology, Princess Margaret Cancer Centre/University of Toronto, Toronto, Ontario (Canada); Kim, John; Dawson, Laura A.; Bayley, Andrew; Cho, B.C. John [Department of Radiation Oncology, Princess Margaret Cancer Centre/University of Toronto, Toronto, Ontario (Canada); Goldstein, David; Gullane, Patrick [Department of Otolaryngology-Head and Neck Surgery/Surgical Oncology, Princess Margaret Cancer Centre/University of Toronto, Toronto, Ontario (Canada); Yu, Eugene [Department of Radiology, Princess Margaret Cancer Centre, Toronto, Ontario (Canada); Perez-Ordonez, Bayardo; Weinreb, Ilan [Department of Pathology, Princess Margaret Cancer Centre, Toronto, Ontario (Canada); Waldron, John, E-mail: John.Waldron@rmp.uhn.on.ca [Department of Radiation Oncology, Princess Margaret Cancer Centre/University of Toronto, Toronto, Ontario (Canada)

    2013-12-01T23:59:59.000Z

    Purpose: To compare the temporal lymph node (LN) regression and regional control (RC) after primary chemoradiation therapy/radiation therapy in human papillomavirus-related [HPV(+)] versus human papillomavirus-unrelated [HPV(?)] head-and-neck cancer (HNC). Methods and Materials: All cases of N2-N3 HNC treated with radiation therapy/chemoradiation therapy between 2003 and 2009 were reviewed. Human papillomavirus status was ascertained by p16 staining on all available oropharyngeal cancers. Larynx/hypopharynx cancers were considered HPV(?). Initial radiologic complete nodal response (CR) (?1.0 cm 8-12 weeks after treatment), ultimate LN resolution, and RC were compared between HPV(+) and HPV(?) HNC. Multivariate analysis identified outcome predictors. Results: A total of 257 HPV(+) and 236 HPV(?) HNCs were identified. The initial LN size was larger (mean, 2.9 cm vs 2.5 cm; P<.01) with a higher proportion of cystic LNs (38% vs 6%, P<.01) in HPV(+) versus HPV(?) HNC. CR was achieved is 125 HPV(+) HNCs (49%) and 129 HPV(?) HNCs (55%) (P=.18). The mean post treatment largest LN was 36% of the original size in the HPV(+) group and 41% in the HPV(?) group (P<.01). The actuarial LN resolution was similar in the HPV(+) and HPV(?) groups at 12 weeks (42% and 43%, respectively), but it was higher in the HPV(+) group than in the HPV(?) group at 36 weeks (90% vs 77%, P<.01). The median follow-up period was 3.6 years. The 3-year RC rate was higher in the HPV(?) CR cases versus non-CR cases (92% vs 63%, P<.01) but was not different in the HPV(+) CR cases versus non-CR cases (98% vs 92%, P=.14). On multivariate analysis, HPV(+) status predicted ultimate LN resolution (odds ratio, 1.4 [95% confidence interval, 1.1-1.7]; P<.01) and RC (hazard ratio, 0.3 [95% confidence interval 0.2-0.6]; P<.01). Conclusions: HPV(+) LNs involute more quickly than HPV(?) LNs but undergo a more prolonged process to eventual CR beyond the time of initial assessment at 8 to 12 weeks after treatment. Post radiation neck dissection is advisable for all non-CR HPV(?)/non-CR N3 HPV(+) cases, but it may be avoided for selected non-CR N2 HPV(+) cases with a significant LN involution if they can undergo continued imaging surveillance. The role of positron emission tomography for response assessment should be investigated.

  3. Quantum mechanical study of solvent effects in a prototype S{sub N}2 reaction in solution: Cl{sup ?} attack on CH{sub 3}Cl

    SciTech Connect (OSTI)

    Kuechler, Erich R. [BioMaPS Institute and Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854-8087 (United States) [BioMaPS Institute and Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854-8087 (United States); Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431 (United States); York, Darrin M., E-mail: york@biomaps.rutgers.edu [BioMaPS Institute and Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854-8087 (United States)

    2014-02-07T23:59:59.000Z

    The nucleophilic attack of a chloride ion on methyl chloride is an important prototype S{sub N}2 reaction in organic chemistry that is known to be sensitive to the effects of the surrounding solvent. Herein, we develop a highly accurate Specific Reaction Parameter (SRP) model based on the Austin Model 1 Hamiltonian for chlorine to study the effects of solvation into an aqueous environment on the reaction mechanism. To accomplish this task, we apply high-level quantum mechanical calculations to study the reaction in the gas phase and combined quantum mechanical/molecular mechanical simulations with TIP3P and TIP4P-ew water models and the resulting free energy profiles are compared with those determined from simulations using other fast semi-empirical quantum models. Both gas phase and solution results with the SRP model agree very well with experiment and provide insight into the specific role of solvent on the reaction coordinate. Overall, the newly parameterized SRP Hamiltonian is able to reproduce both the gas phase and solution phase barriers, suggesting it is an accurate and robust model for simulations in the aqueous phase at greatly reduced computational cost relative to comparably accurate ab initio and density functional models.

  4. Relativistic distorted-wave collision strengths for the 49 ?n=0 optically allowed transitions with n=2 in the 67 B-like ions with 26?Z?92

    SciTech Connect (OSTI)

    Fontes, Christopher J., E-mail: cjf@lanl.gov; Zhang, Hong Lin

    2014-05-15T23:59:59.000Z

    Relativistic distorted-wave collision strengths have been calculated for the 49 ?n=0 optically allowed transitions with n=2 in the 67 B-like ions with nuclear charge number Z in the range 26?Z?92. The calculations were made for the four final, or scattered, electron energies E{sup ?}=0.20, 0.42, 0.80, and 1.40, where E{sup ?} is in units of Z{sub eff}{sup 2} Ry with Z{sub eff}=Z?3.33. In the present calculations, an improved “top-up” method, which employs relativistic plane waves, was used to obtain the high partial-wave contribution for each transition, in contrast to the partial-relativistic Coulomb–Bethe approximation used in previous work by Zhang and Sampson [H.L. Zhang and D.H. Sampson, At. Data Nucl. Data Tables 56 (1994) 41]. In that earlier work, collision strengths were also provided for B-like ions, but for a more comprehensive data set consisting of all 105 ?n=0 transitions, six scattered energies and the 85 ions with Z in the range 8?Z?92. The collision strengths covered in the present work should be more accurate than the corresponding data given by Zhang and Sampson [H.L. Zhang and D.H. Sampson, At. Data Nucl. Data Tables 56 (1994) 41] and are presented here to replace those earlier results.

  5. F O R E S T R E S E A R C H C O R P O R A T E P L A N 2 0 0 2 2 0 0 5

    E-Print Network [OSTI]

    F O R E S T R E S E A R C H #12;C O R P O R A T E P L A N 2 0 0 2 ­ 2 0 0 5 F O R E S T R E S E A R C H Forest Research C O R P O R A T E P L A N 2 0 0 2 ­ 2 0 0 5 1 #12;C O R P O R A T E P L A N 2 0 0 2 ­ 2 0 0 5 F O R E S T R E S E A R C H Acting Chief Executive Peter Freer-Smith Forest Research

  6. Prof. Dr. Uwe Holtz Universitt Bonn Am Hofgarten 15D -53113 Bonn UHoltz@aol.com www.uni-bonn.de/~uholtz1 OECD (Hg.): DAC Peer Review Germany, Paris 2006.4

    E-Print Network [OSTI]

    Franz, Sven Oliver

    .uni-bonn.de/~uholtz1 6.4.072 3 OECD (Hg.): DAC Peer Review Germany, Paris 2006.4 (www.oecd.org/dataoecd/54 of poorer countries but need for greater strategic selectivity8 9 Germany has never stated a preference in favor of specific groups of countries. Germany admits10 that poorest countries need donors' full support

  7. Stress corrosion cracking: New experiments, new insights M I T E N E R G Y I N I T I AT I V E A U T U M N 2 0 1 2

    E-Print Network [OSTI]

    Yildiz, Bilge

    % post-consumer recycled content, with the balance coming from responsibly managed sources. Energy. Economic pressures both in the United States and in other key economies around the world threaten T U M N 2 0 1 2 I N T H I S I S S U E Energy Futures Discovering solutions: Undergrads take the lead

  8. JOURNAL DE PHYSIQUE CoZZoque C7, suppl6ment au n07, Tome 40, JuiZZet 1979, page C7-483 LASERfFIBER OPTIC BREAKDOWNOF A PUS CHARGED 90% AT-1096 N2GAS SWITCH

    E-Print Network [OSTI]

    Boyer, Edmond

    . The influence of laser power, gas mixture, focal point location, pressure, time of laser insertion etcFIBER OPTIC BREAKDOWNOF A PUS CHARGED 90% AT-1096 N2GAS SWITCH L.L. Hatfield, H.C. ~arjes',M. ~ristiansen', A initiation of the breakdown in a sions of the technique. pulse charged gas switch i s described. A novel

  9. The concrete theory of numbers : New Mersenne conjectures. Simplicity and other wonderful properties of numbers $L(n) = 2^{2n}\\pm2^n\\pm1$

    E-Print Network [OSTI]

    Boris V. Tarasov

    2008-04-24T23:59:59.000Z

    New Mersenne conjectures. The problems of simplicity, common prime divisors and free from squares of numbers $L(n) = 2^{2n}\\pm2^n\\pm1$ are investigated. Wonderful formulas $gcd $ for numbers $L (n) $ and numbers repunit are proved.

  10. Effect of temperature on the protonation of N-(2-hydroxyethyl) ethylenediamine-N,N'N'-triacetic acid in aqueous solutions: Potentiometric and calorimetric studies

    SciTech Connect (OSTI)

    Xingliang Li; Zhicheng Zhang; Francesco Endrizzi; Leigh Martin; Shunzhong Luo; Linfeng Rao

    2015-01-01T23:59:59.000Z

    The TALSPEAK process (Trivalent Actinide Lanthanide Separations by Phosphorus-reagent Extraction from Aqueous Komplexes) has been demonstrated in several pilot-scale operations to be effective at separating trivalent actinides (An3+) from trivalent lanthanides (Ln3+). However, fundamental studies have revealed undesired aspects of TALSPEAK, such as the signi?cant partitioning of Na+, lactic acid, and water into the organic phase, thermodynamically unpredictable pH dependence, and the slow extraction kinetics. In the modi?ed TALSPEAK process, the combination of the aqueous holdback complexant HEDTA (N-(2-hydroxyethyl)ethylenediamine-N,N0,N0-triacetic acid) with the extractant HEH[EHP] (2-ethyl(hexyl) phosphonic acid mono-2-ethylhexyl ester) in the organic phase has been found to exhibit a nearly ?at pH dependence between 2.5 and 4.5 and more rapid phase transfer kinetics for the heavier lanthanides. To help understand the speciation of Ln3+ and An3+ in the modi?ed TALSPEAK, systematic studies are underway on the thermodynamics of major reactions in the HEDTA system under conditions relevant to the process (e.g., higher temperatures). Thermodynamics of the protonation and complexation of HEDTA with Ln3+ were studied at variable temperatures. Equilibrium constants and enthalpies were determined by a combination of techniques including potentiometry and calorimetry. This paper presents the protonation constants of HEDTA at T = (25 to 70) C. The potentiometric titrations have demonstrated that, stepwise, the ?rst two protonation constants decrease and the third one slightly increases with the increase of temperature. This trend is in good agreement with the enthalpy of proton-ation directly determined by calorimetry. The results of NMR analysis further con?rm that the ?rst two protonation reactions occur on the diamine nitrogen atoms, while the third protonation reaction occurs on the oxygen of a carboxylate group. These data, in conjunction with the thermodynamic parameters of Ln3+/An3+ complexes with HEDTA at different temperatures, will help to predict the speciation and temperature-dependent behavior of Ln3+/An3+ in the modi?ed TALSPEAK process.

  11. Electrochemical Oxidation of H2 Catalyzed by Ruthenium Hydride Complexes Bearing P2N2 Ligands With Pendant Amines as Proton Relays

    SciTech Connect (OSTI)

    Liu, Tianbiao L.; Rakowski DuBois, Mary; DuBois, Daniel L.; Bullock, R. Morris

    2014-11-03T23:59:59.000Z

    Two Ru hydride complexes (Cp*Ru(PPh2NBn2)H, 1-H and (Cp*Ru(PtBu2NBn2)H, 2-H) supported by cyclic PR2NR'2 ligands (Cp* = ?5-C5Me5; 1,5-diaza-3,7-diphosphacyclooctane, where R = Ph or tBu and R' = Bn) have been synthesized and fully characterized. Both complexes are demonstrated to be electrocatalysts for oxidation of H2 (1 atm, 22 °C) in the presence of external base, DBU (1,8-diazabicyclo[5.4.0]undec-7-ene). The turnover frequency of 2-H is 1.2 s-1, with an overpotential at Ecat/2 of 0.45 V, while catalysis by 1-H has a turnover frequency of 0.6 s-1 and an overpotential of 0.6 V at Ecat/2. Addition of H2O facilitates oxidation of H2 by 2-H and increases its turnover frequency to 1.9 s-1 while , H2O slows down the catalysis by 1-H. The different effects of H2O for 1-H and 2-H are ascribed to different binding affinities of H2O to the Ru center of the corresponding unsaturated species, [Cp*Ru(PPh2NBn2)]+ and [Cp*Ru(PPh2NBn2)]+. In addition, studies of Cp*Ru(dmpm)H (where dmpm = bis(dimethylphosphino)methane), a control complex lacking pendent amines in its diphosphine ligand, confirms the critical roles of the pendent amines of P2N2 ligands for oxidation of H2. We thank the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences, for supporting initial parts of the work. Current work is supported by the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. Pacific Northwest National Laboratory is operated by Battelle for the U.S. Department of Energy.

  12. Neutron diffraction study at 37 K of sodium triaqua(ethylenediaminetetraacetato)samarate(III) pentahydrate, Na[Sm(C10H12N2O8)(H2O)3].5H2O

    E-Print Network [OSTI]

    Engel, D. W.; Takusagawa, Fusao; Koetzle, T. F.

    1984-01-01T23:59:59.000Z

    at 37 K of Sodium Triaqua(ethylenediamine- tetraacetato)samarate(III) Pentahydrate, Na[Sm(C10H12N2O8)(H2O)3].5H2O* BY DENNIS W . ENGEL*|* Physics Department, University of Durban- Westville, Private Bag X54001, Durban 4000, South Africa AND FUSAO... by © 1984 International Union of Crystallography 1688 Na[Sm(C10H12N2O8)(H2O)3].5H2O Hoard, Lee & Lind (1965) and Lee (1967). The authors reported the structures of KLa/1.8H20 and NaTM.8H20 by X-ray diffraction. A further X-ray determination...

  13. Microsoft Word - Hg.doc

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHighandSWPA / SPRA / USACE SWPAURTeC:8CO6 Figureand

  14. SES: Methods in Microbial Ecology Fall 2013 Problem Set 5 (Due TUESDAY 22 Oct 2013)*

    E-Print Network [OSTI]

    Vallino, Joseph J.

    the concentration of H2S and CH4 (x-axis) versus depth (y-axis). On the graph, also indicate the height of the water and which is the reducing agent? a) CH4 + SO4 2- CO2 + S2- + 2H2O b) 5 H2S + 8 NO3 - 5 SO4 2- + 4 N2 + 4 H)? 4) A) Say you measure H2S concentration in a sediment and find that it decreases linearly from 3 m

  15. SES: Methods in Microbial Ecology Fall 2014 Problem Set 5 (Due 16 Oct 2014)*

    E-Print Network [OSTI]

    Vallino, Joseph J.

    the concentration of H2S and CH4 (x-axis) versus depth (y-axis). On the graph, also indicate the height of the water + SO4 2- CO2 + S2- + 2H2O b) 5 H2S + 8 NO3 - 5 SO4 2- + 4 N2 + 4 H2O + 2 H+ c) C6H12O6 2 CO2 + 2 C2H6O d) What is the oxidation state of C in the formic acid (CH2O2)? 4) A) Say you measure H2S

  16. Anaerobic ammonium oxidation (anammox) bacteria and sulfide-dependent denitrifiers coexist in the water column of a meromictic south-alpine lake

    E-Print Network [OSTI]

    Wehrli, Bernhard

    potential electron donors-- glucose, acetate, Mn(II), Fe(II), and H2S--revealed that N2 formation oxidation (anammox) or sulfide-dependent denitrification may be important modes for the removal of fixed gas (N2) has for a long time been viewed as the only pathway for fixed N removal. However, recent

  17. Measurement of the cross sections of the reaction /sup 237/Np (n, 2n) /sup 236/Np (22. 5 h) for neutron energies in the range 7-10 MeV

    SciTech Connect (OSTI)

    Kornilov, N.V.; Balitskii, A.V.; Baryba, V.Y.; Kuz'minov, B.D.; Rudenko, A.P.

    1985-08-01T23:59:59.000Z

    This paper presents experimental results of the study of the energy dependence of the cross section for the formation of /sup 236/PU in the reaction /sup 237/Np (n, 2n). Together with the results for neutron energies near 14 MeV, they present the possibility for describing this cross section in the entire energy interval of importance for fast reactors. The urgency of a theoretical study of the reaction examined here remains, taking into account the quantum characterisitics of the low-lying levels.

  18. On a Theorem on sums of the form 1+2^(2^n)+2^(2^n+1)+...+2^(2^n+m) and a result linking Fermat with Mersenne numbers

    E-Print Network [OSTI]

    Konstantine "Hermes" Zelator

    2008-06-09T23:59:59.000Z

    In his book "250 Problems in Elementary Number Theory", W.Sierpinski shows that the numbers 1+2^(2^n)+2^(2^n+1) are divisible by 21; for n=1,2,.... In this paper, we prove a similar but more general result.Consider the natural numbers of the form I(n.m)= 1+2^(2^n)+2^(2^n+1)+...+2^(2^n+m).In Theorem 1 we prove that for every odd integer N greater than 1, there exist infinitely many natural numbers n and m such that the integers I(n.m) are divisible by N. We give an explicit construction of the numbers n and m, for a given N. As an example, when N=31, and with n=4k and m=94+124i, the numbers I(n,m) are divisible by 31. A similar example is offered for N=(31)(7)=217. In Theorem 2, we prove a result pertaining to Mersenne numbers.There are also three Corollaries in this work, one of which deals with Fermat numbers.

  19. Analysis of HgI{sub 2} and PbI{sub 2} crystals and detectors by particle-induced x-ray emission (PIXE) and ion backscattering spectroscopy (IBS)

    SciTech Connect (OSTI)

    Bench, G.S.; Heikkinen, D.W. [Lawrence Livermore National Lab., CA (United States); Antolak, A.J.; Morse, D.H.; Pontau, A.E.; James, R.B.; David, D.C. [Sandia National Labs., Livermore, CA (United States); Burger, A. [Fisk Univ., Nashville, TN (United States); Van Den Berg, L. [EG and G Energy Measurements, Inc., Goleta, CA (United States)

    1993-03-01T23:59:59.000Z

    The Ion Micro-Analysis Group (IMAG) in Livermore conducts quantitative trace elemental analysis with PIXE and depth profiling with IBS using an MeV ion microbeam. The system has the capability to produce two-dimensional trace element and IBS images. PIXE analyses have been conducted on HgI{sub 2} and PbI{sub 2} crystals and detector materials in order to identify and quantify near surface trace contaminants. IBS measurements have been conducted to investigate elemental depth distributions in various materials. The results of measurements on several different samples are reported and a discussion of factors affecting quantitative in vacuo microanalysis of these materials is presented.

  20. Near-Zero Emissions Oxy-Combustion Flue Gas Purification Task 3: SOx/NOx/Hg Removal for Low Sulfur Coal

    SciTech Connect (OSTI)

    Monica Zanfir; Rahul Solunke; Minish Shah

    2012-06-01T23:59:59.000Z

    The goal of this project was to develop a near-zero emissions flue gas purification technology for existing PC (pulverized coal) power plants that are retrofitted with oxycombustion technology. The objective of Task 3 of this project was to evaluate an alternative method of SOx, NOx and Hg removal from flue gas produced by burning low sulfur coal in oxy-combustion power plants. The goal of the program was to conduct an experimental investigation and to develop a novel process for simultaneously removal of SOx and NOx from power plants that would operate on low sulfur coal without the need for wet-FGD & SCRs. A novel purification process operating at high pressures and ambient temperatures was developed. Activated carbonâ??s catalytic and adsorbent capabilities are used to oxidize the sulfur and nitrous oxides to SO{sub 3} and NO{sub 2} species, which are adsorbed on the activated carbon and removed from the gas phase. Activated carbon is regenerated by water wash followed by drying. The development effort commenced with the screening of commercially available activated carbon materials for their capability to remove SO{sub 2}. A bench-unit operating in batch mode was constructed to conduct an experimental investigation of simultaneous SOx and NOx removal from a simulated oxyfuel flue gas mixture. Optimal operating conditions and the capacity of the activated carbon to remove the contaminants were identified. The process was able to achieve simultaneous SOx and NOx removal in a single step. The removal efficiencies were >99.9% for SOx and >98% for NOx. In the longevity tests performed on a batch unit, the retention capacity could be maintained at high level over 20 cycles. This process was able to effectively remove up to 4000 ppm SOx from the simulated feeds corresponding to oxyfuel flue gas from high sulfur coal plants. A dual bed continuous unit with five times the capacity of the batch unit was constructed to test continuous operation and longevity. Full-automation was implemented to enable continuous operation (24/7) with minimum operator supervision. Continuous run was carried out for 40 days. Very high SOx (>99.9%) and NOx (98%) removal efficiencies were also achieved in a continuous unit. However, the retention capacity of carbon beds for SOx and NOx was decreased from ~20 hours to ~10 hours over a 40 day period of operation, which was in contrast to the results obtained in a batch unit. These contradictory results indicate the need for optimization of adsorption-regeneration cycle to maintain long term activity of activated carbon material at a higher level and thus minimize the capital cost of the system. In summary, the activated carbon process exceeded performance targets for SOx and NOx removal efficiencies and it was found to be suitable for power plants burning both low and high sulfur coals. More efforts are needed to optimize the system performance.

  1. A Hydrogen-Evolving Ni(P2N2)2 Electrocatalyst Covalently Attached to a Glassy Carbon Electrode: Preparation, Characterization, and Catalysis. Comparisons With the Homogeneous Analog

    SciTech Connect (OSTI)

    Das, Atanu K.; Engelhard, Mark H.; Bullock, R. Morris; Roberts, John A.

    2014-07-07T23:59:59.000Z

    A hydrogen-evolving homogeneous Ni(P2N2)2 electrocatalyst with peripheral ester groups has been covalently attached to a 1,2,3-triazolyllithium-terminated glassy carbon electrode. The surface-confined complex is an electroctalyst for hydrogen evolution, showing onset of catalytic current at the same potential as the soluble parent complex. X-ray photoemission spectra show excellent agreement between the coupled and homogeneous species. Coverage approaches a dense monolayer. This research was supported as part of the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy. The XPS measurements were performed at EMSL, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory.

  2. Sciences Po Grenoble working paper n.2

    E-Print Network [OSTI]

    Boyer, Edmond

    will first analyse the forms of resistance to hard law based on the widespread secondary literature available. This will then be compared to areas in which soft law reigns, with a view to demonstrate that soft law triggers as much resistance as hard law. Based on this empirical data and using a policy instruments approach, the paper

  3. Ao XI, N2 / 2002 Mayo -Agosto

    E-Print Network [OSTI]

    Gracia, Carlos

    manifiesto que, más allá del calentamiento global, existen dos cinturones en el planeta situados cambios de la temperatura global del planeta han sido inferiores a 1º C por siglo durante los últimos 10

  4. RSE Table N2.1 and N2.2. Relative Standard Errors for Tables N2.1 and N2.2

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghurajiConventionalMississippi"site.1 Relative Standard Errors for Table 1.1;"2 RelativeE8.1

  5. Effect of annealing on the kinetic properties and band parameters of Hg{sub 1?x?y}Cd{sub x}Eu{sub y}Se semiconductor crystals

    SciTech Connect (OSTI)

    Kovalyuk, T. T., E-mail: tarik-1006@mail.ru; Maistruk, E. V.; Maryanchuk, P. D. [Chernivtsy National University (Ukraine)

    2014-12-15T23:59:59.000Z

    The results of studies of the kinetic properties of Hg{sub 1?x?y}Cd{sub x}Eu{sub y}Se semiconductor crystals in the ranges of temperatures T = 77–300 K and magnetic fields H = 0.5–5 kOe before and after heat treatment of the samples in Se vapors are reported. It is established that annealing of the samples in Se vapors induces a decrease in the electron concentration. From the concentration dependence of the electron effective mass at the Fermi level, the band gap, the matrix element of interband interaction, and the electron effective mass at the bottom of the conduction band are determined.

  6. Optimal geometries and harmonic vibrational frequencies of the global minima of water clusters (H2O)n, n=2-6, and several hexamer local minima at the CCSD(T) level of theory

    SciTech Connect (OSTI)

    Miliordos, Evangelos; Apra, Edoardo; Xantheas, Sotiris S.

    2013-09-21T23:59:59.000Z

    We report the first optimum geometries and harmonic vibrational frequencies for the ring pentamer and several water hexamer (prism, cage, cyclic and two book) at the CCSD(T)/aug-cc-pVDZ level of theory. All five hexamer isomer minima previously reported by MP2 are also minima on the CCSD(T) potential energy surface (PES). In addition, all CCSD(T) minimum energy structures for the n=2-6 cluster isomers are quite close to the ones previously obtained by MP2 on the respective PESs, as confirmed by a modified Procrustes analysis that quantifies the difference between any two cluster geometries. The CCSD(T) results confirm the cooperative effect of the homodromic ring networks (systematic contraction of the nearest-neighbor (nn) intermolecular separations with cluster size) previously reported by MP2, albeit with O-O distances shorter by ~0.02 Å, indicating that MP2 overcorrects this effect. The harmonic frequencies at the minimum geometries were obtained by the double differentiation of the CCSD(T) energy using an efficient scheme based on internal coordinates that reduces the number of required single point energy evaluations by ~15% when compared to the corresponding double differentiation using Cartesian coordinates. Negligible differences between MP2 and CCSD(T) are found for the librational modes, while uniform increases of ~15 and ~25 cm-1 are observed for the bending and “free” OH harmonic frequencies. The largest differences between MP2 and CCSD(T) are observed for the harmonic hydrogen bonded frequencies. The CCSD(T) red shifts from the monomer frequencies (??) are smaller than the MP2 ones, due to the fact that the former produces shorter elongations (?R) of the respective hydrogen bonded OH lengths from the monomer value with respect to the latter. Both the MP2 and CCSD(T) results for the hydrogen bonded frequencies were found to closely follow the relation - ?? = s ? ?R, with a rate of s = 20.3 cm-1 / 0.001 Å. The CCSD(T) harmonic frequencies, when corrected using the MP2 anharmonicities obtained from second order vibrational perturbation theory (VPT2), produce anharmonicCCSD(T) estimates that are within < 60 cm-1 from the measured infrared (IR) active bands of the n=2-6 clusters and furthermore trace the observed red shifts with respect to the monomer (??) quite accurately. The energetic order between the various hexamer isomers on the PES (prism has the lowest energy) previously reported at MP2 was found to be preserved at the CCSD(T) level, whereas the inclusion of anharmonic corrections further stabilizes the cage among the hexamer isomers.

  7. A Crossed Beam and ab Initio Investigation of the Reaction of Hydrogen Sulfide, H2S(X1A1), with Dicarbon Molecules, C2(X1g

    E-Print Network [OSTI]

    Kaiser, Ralf I.

    alternative pathways, the elimination of atomic and molecular hydrogen from a thioketene (H2CCS) intermediate, to synthesize HCCS and CCS are also discussed. 1. Introduction Investigating the formation of sulfur bearing molecules.11 However. despite the potential key role of HCnS isomers to understand the organosulfur

  8. On modeling the potential impacts of CO2 sequestration on shallow groundwater: Transport of organics and co-injected H2S by supercritical CO2 to shallow aquifers

    E-Print Network [OSTI]

    Zheng, L.

    2014-01-01T23:59:59.000Z

    reservoir to shallower formations, for example through fault or fracture zones, or poorly plugged abandoned

  9. DENSE PHASE REBURN COMBUSTION SYSTEM (DPRCS) DEMONSTRATION ON A 154 MWE TANGENTIAL FURNACE: ADDITIONAL AREA OF INTEREST-TO DEVELOP AND DEMONSTRATE AN IN-FURNACE MULTI-POLLUTANT REDUCTION TECHNOLOGY TO REDUCE NOx, SO2 & Hg

    SciTech Connect (OSTI)

    Allen C. Wiley; Steven Castagnero; Geoff Green; Kevin Davis; David White

    2004-03-01T23:59:59.000Z

    Semi-dense phase pneumatic delivery and injection of calcium and sodium sorbents, and microfine powdered coal, at various sidewall elevations of an online operating coal-fired power plant, was investigated for the express purpose of developing an in-furnace, economic multi-pollutant reduction methodology for NO{sub x}, SO{sub 2} & Hg. The 154 MWe tangentially-fired furnace that was selected for a full-scale demonstration, was recently retrofitted for NO{sub x} reduction with a high velocity rotating-opposed over-fire air system. The ROFA system, a Mobotec USA technology, has a proven track record of breaking up laminar flow along furnace walls, thereby enhancing the mix of all constituents of combustion. The knowledge gained from injecting sorbents and micronized coal into well mixed combustion gases with significant improvement in particulate retention time, should serve well the goals of an in-furnace multi-pollutant reduction technology; that of reducing back-end cleanup costs on a wide variety of pollutants, on a cost per ton basis, by first accomplishing significant in-furnace reductions of all pollutants.

  10. PRODUCTION OF HYDROGEN BY SUPERADIABATIC DECOMPOSITION OF HYDROGEN SULFIDE

    E-Print Network [OSTI]

    NREL/CP-610-32405 #12;As a logical extension of our ongoing process development efforts, GTI plans concentrated mainly on the superadiabatic reactor, and has comprised computational modeling and experimental concept, using H2S-N2-O2 gas mixtures. Theoretical (numerical modeling) studies at UIC and collaborative

  11. Grid dispersion and stability criteria of some common finite-element ...

    E-Print Network [OSTI]

    2007-10-30T23:59:59.000Z

    Oct 31, 2007 ... Usually in the FEM literature M represents the mass matrix and K represents the stiffness ..... ing equations 24, 26, and 27 in the left-hand side of equation 23 we get. Mm1m2n1n2 .... 2 hs/h and multiply- ing by h/2 s we get h. 1.

  12. Life on Earth. I. 1 AU from the Sun

    E-Print Network [OSTI]

    Walter, Frederick M.

    and impacts Early atmosphere: CO2, H2O, N2, H2S, SO2, H2 Oceans exist by 4.4 Gyr Impacts: ·4.5 Gyr ·Late Heavy Tectonics and Habitability Subduction removes carbonates into mantle Otherwise greenhouse CO2 accumulates

  13. Life on Earth. II The Hadean Earth

    E-Print Network [OSTI]

    Walter, Frederick M.

    to space Source of atmosphere, oceans: outgassing and impacts Early atmosphere: CO2, H2O, N2, H2S, SO2, H2? #12;Rocks The fossil evidence is preserved in rocks. ·Igneous rock: solidified lava ·Sedimentary rock: sediment laid down and compressed into rock. ·Metamorphic rock: sedimentary rock that has been modified

  14. S P R I N G C O N V O C AT I O N 2 0 1 4 S F U ' S V I S I O N | T H E E N G A G E D U N I V E R S I T Y

    E-Print Network [OSTI]

    S P R I N G C O N V O C AT I O N 2 0 1 4 #12;S F U ' S V I S I O N | T H E E N G A G E D U N I V E ..............................................................................................................2 P R E S I D E N T ' S W E L C O M E .................................................................................................................................................3 P A R T I C I P A N

  15. Mathematical Model Analysis for Hg Flow

    E-Print Network [OSTI]

    McDonald, Kirk

    Properties (25 C ) Density 13.546 kg/L Sound Speed 1451 m/s Viscosity 1.526E-3 kg/sm Dynamic Viscosity 1Mechanism of Jet Breakup & Atomization R.D. Reitz and F.V. Bracco, Mechanism of atomization of a liquid jet,Phys. Fluids, Vol.25, No.10,Oct.1982 Environment Liquid Properties Viscosity Density Jet Breakup & Atomization

  16. High Power Hg Target Conceptual Design Review

    E-Print Network [OSTI]

    McDonald, Kirk

    the WNR Bubble Test Loop · Both containments are designed for 1 atmosphere overpressure #12;8 OAK RIDGE, but ... · Base support structure may be fabricated from painted carbon steel or aluminum · Gaskets shall be non

  17. High Power Hg Target Conceptual Design Review

    E-Print Network [OSTI]

    McDonald, Kirk

    Monitor $12000Total $5500 LabView control system (software & hardware) $500 Control box (power supplies in Solidworks $4800AL Base Support Secondary Containment Primary Containment Sump Subsystem $13000Total $5700SS U. S. DEPARTMENT OF ENERGY Conceptual Design Review 7-8 Feb 05 Outline · Procured systems - Syringe

  18. Mike Singleton 65.910 64.338 64.972 65.251Honda S2000 64.338 1616 53.272 Steve Singleton 75.347 73.033 74.939 70.716Honda S2000 70.716 5864 N2 58.553

    E-Print Network [OSTI]

    Prevedouros, Panos D.

    AS Mike Singleton 65.910 64.338 64.972 65.251Honda S2000 64.338 1616 53.272 Steve Singleton 75.347 73.033 74.939 70.716Honda S2000 70.716 5864 N2 58.553 Class Average : 67.527 PAX Multiplier : .828 BS.808Scion xA 71.808 40661 1 55.795 Cory Toyama 82.421 77.158 76.448 75.498Honda Civic 75.498 5977 58

  19. Surface characterization of Pd/Al2O3 sorbents for mercury capture from fuel gas

    SciTech Connect (OSTI)

    Baltrus, J.P.; Granite, E.J.; Stanko, D.C.; Pennline, H.W.

    2008-01-01T23:59:59.000Z

    The surface composition of a series of Pd/alumina sorbents has been characterized to better understand the factors influencing their ability to adsorb mercury from fuel gas. Both a temperature effect and a dispersion effect were found. Maximum adsorption of Hg occurred at the -lowest temperature tested, 204°C, and decreased with increasing temperatures. Maximum adsorption of Hg on a per-atom basis of Pd is observed at low loadings of Pd ( < 8.5% Pd) due to better dispersion of Pd at those loadings; a change in its partitioning occurs at higher loadings. The presence of H2S 'in the fuel gas acts to promote the adsorption of Hg through its association with Hg in the Pd lattice.

  20. Surface characterization of Pd/Al2O3 sorbents for mercury capture from fuel gas

    SciTech Connect (OSTI)

    Baltrus, J.P.; Granite, E.J.; Stanko, D.C.; Pennline, H.W.

    2008-09-01T23:59:59.000Z

    The surface composition of a series of Pd/alumina sorbents has been characterized to better understand the factors influencing their ability to adsorb mercury from fuel gas. Both a temperature effect and a dispersion effect were found. Maximum adsorption of Hg occurred at the lowest temperature tested, 2048C, and decreased with increasing temperatures. Maximum adsorption of Hg on a per-atom basis of Pd is observed at low loadings of Pd (58.5% Pd) due to better dispersion of Pd at those loadings; a change in its partitioning occurs at higher loadings. The presence of H2S in the fuel gas acts to promote the adsorption of Hg through its association with Hg in the Pd lattice.

  1. U N I V E R S I T Y O F R O C H E S T E R , O N E U N I V E R S I T Y --O N E P L A N 2 0 0 8 C A M P U S M A S T E R P L A N

    E-Print Network [OSTI]

    Portman, Douglas

    U N I V E R S I T Y O F R O C H E S T E R , O N E U N I V E R S I T Y -- O N E P L A N 2 0 0 8 C A M P U S M A S T E R P L A N E x e c u t i v e S u m m a r y #12;U N I V E R S I T Y O F R O C H E S T E R , O N E U N I V E R S I T Y -- O N E P L A N Copyright © 2008 AYERS | SAINT | GROSS All Rights

  2. Revue Europenne des Migrations Internationales Volume 8 n2,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    enfants migrants se traitent d'« arabe » dans une classe primaire Pierre ACHARD, Gabrielle VARRO, François

  3. VOL. 26, N 2, 2007 ISSN 0253-6730

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    mammifères des Balkans. Les niveaux les plus anciens de la séquence correspondent au début du Pléistocène of some taxa of this subfamily were considered in comparison with the main sites of western and eastern of the fundamental biostratigraphic stakes for the large mammals of the Balkans. The older levels are correlated

  4. 1 function fe2d_n 2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    E-Print Network [OSTI]

    Garvie, Marcus R

    _ki = triangle_area*s1/(h3*h1); 98 K_ik = K_ki; 99 K_kj = triangle_area*s2/(h3*h2); 100 K_jk = K_kj; 101 K

  5. 1 function fe2dx_n 2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    E-Print Network [OSTI]

    Garvie, Marcus R

    _ki = triangle_area*s1/(h3*h1); 98 K_ik = K_ki; 99 K_kj = triangle_area*s2/(h3*h2); 100 K_jk = K_kj; 101 K

  6. Aspects of Four Dimensional N = 2 Field Theory 

    E-Print Network [OSTI]

    Xie, Dan

    2011-07-11T23:59:59.000Z

    hypermulti- plets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 22 Left: (p, q)-web realizing the TN theory, with aligned 7-branes. Right: Quiver diagram of the mirror of TN , with gauge groups U(r). The group at the center... gauge groups are U(r). . . 137 xiii FIGURE Page 25 Top: We take two copies of TN and gauge together two SU(N) Higgs symmetries. Bottom: Its mirror. We gauge together two SU(N) Coulomb symmetries. This ends up eliminating the two T[SU(N)] tails. Here...

  7. SSQ V3 N2_Final_13aug13.indd

    National Nuclear Security Administration (NNSA)

    to become the world's first teraflop supercomputer (a teraflop represents one trillion mathematical operations per second.) (b) Raj Hazra of Intel is holding a 1 TF chip in...

  8. Aspects of Four Dimensional N = 2 Field Theory

    E-Print Network [OSTI]

    Xie, Dan

    2011-07-11T23:59:59.000Z

    The Coulomb branch of pure SU(2) gauge theory. There is an auxiliary torus attached at each point. Two singularities appear in the strongly coupled region. There is a circle goes through the singularities representing the marginal stability wall across...) 5-branes; here N = 3. In the figure the D5?s are semi-infinite, while NS5?s and (1, 1) 5-branes terminate each on a 7-brane ? of the same type. The Coulomb branch of the 5d low energy theory is not sensitive to this difference...

  9. N2 Spirit of Management | -Chaire KBL HEC-ULg|

    E-Print Network [OSTI]

    Liège, Université de

    social responsibility, were formalized at the 2007 Global Compact Leaders Summit held in Geneva last July

  10. SSQ V1 N2_6june11_FINAL

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA Approved:AdministrationAnalysis andBHoneywell9/%2ARequest forMod0/%2A enFY12

  11. SSQ V3 N2_Final_13aug13.indd

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA Approved:AdministrationAnalysis andBHoneywell9/%2ARequest forMod0/%2A2 *

  12. ELECTROSTATIC (LANGMUIR) PROBE MEASUREMENTS IN RF DRIVEN He, N2, BCl3, AND BCl3/N2 PLASMAS

    E-Print Network [OSTI]

    Pathak, Bogdan Amaru

    2008-08-01T23:59:59.000Z

    with similar kT e and N e values or using similar etching chemistries. 5 1.3. Plasma Chemistry?Reactive, Inert, and Inhibiting Species Previous work in the University of Kansas Plasma Research Laboratory (KU PRL or KU Plasma Research Lab) has focused...

  13. Observation of a stripping threshold for the reaction N2 ^++CH4?N2H^++CH3

    E-Print Network [OSTI]

    Wyatt, J. R.; Strattan, L. W.; Snyder, S. C.; Hierl, Peter M.

    1976-01-01T23:59:59.000Z

    to possess a threshold at 0.1 eV. At the higher energies there is a large isotope effect favoring abstraction of H over D. The product velocity vector distribution is strongly peaked forward of the center of mass, indicating that the reaction is predominantly...

  14. Molecular Simulation Studies of Separation of CO2/N2, CO2/CH4, and CH4/N2

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch > The EnergyCenterDioxide CaptureSee the Foundry's full equipmentby ZIFs

  15. Hg System Operation Review V.B. Graves

    E-Print Network [OSTI]

    McDonald, Kirk

    and capture - Vapor monitors work as expected - Local ventilation system (Scavenger) quickly removes any

  16. Klaus Belke Ewald Kislinger Andreas Kulzer Maria A. Stassinopoulou (Hg.)

    E-Print Network [OSTI]

    Manning, Sturt

    for paintings by Rembrandt, Rubens, and similar painters, also for the wainscoting of English country manors

  17. Packed bed reactor for photochemical sup 196 Hg isotope separation

    SciTech Connect (OSTI)

    Grossman, M.W.; Speer, R.

    1992-03-03T23:59:59.000Z

    This patent describes a photochemical reactor useful for the isotopic enrichment of a predetermined isotope of mercury comprising a reactor cell and a monoisotopic light source It comprises: a plurality of transparent, straight reactor cell tubes disposed axially within the internal volume of the reactor cell to increase the surface area thereof for production deposition.

  18. Target Design Meeting Nozzle & Hg Collection Tests, Design

    E-Print Network [OSTI]

    McDonald, Kirk

    an interpretation of the requirements in ISO 2919, Table 2, Class 2 - Temperature: -400C to 800C - External pressure to monitor sump tank; remote readout - Level sensor to monitor sump tank; remote readout #12;8 OAK RIDGE

  19. Packed bed reactor for photochemical .sup.196 Hg isotope separation

    DOE Patents [OSTI]

    Grossman, Mark W. (Belmont, MA); Speer, Richard (Reading, MA)

    1992-01-01T23:59:59.000Z

    Straight tubes and randomly oriented pieces of tubing having been employed in a photochemical mercury enrichment reactor and have been found to improve the enrichment factor (E) and utilization (U) compared to a non-packed reactor. One preferred embodiment of this system uses a moving bed (via gravity) for random packing.

  20. Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, search OpenEIHesperia, California: Energy Resources Jump to: navigation,Areas |

  1. Revisiting HgCl2: A Solution- and Solid-State 199Hg NMR and ZORA-DFT Computational Study

    E-Print Network [OSTI]

    Taylor, Robert E; Carver, Colin T; Larsen, Ross E; Dmitrenko, Olga; Bai, Shi; Dybowski, Cecil

    2009-01-01T23:59:59.000Z

    7 (1997), 333-336. [26] R. E. Taylor, Concepts Magn. Reson.DFT Computational Study R. E. Taylor 1 *, Colin T. Carver2522 USA *Corresponding author: R. E. Taylor Email address:

  2. 3UREOHP 6WDWHPHQW3UREOHP 6WDWHPHQW 0HWKRGRORJ\\ (PSOR\\HG0HWKRGRORJ\\ (PSOR\\HG

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    characterization.a reliable reservoir characterization. Most common type of data that may be foundMost common type DataProduction Data Model the reservoirModel the reservoir using a Simulatorusing a Simulator price of oil & gas is high requiresa time when price of oil & gas is high requires a reliable reservoir

  3. EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    (H2S) via a complex pathway of biochemical reactions. Once the gaseous H2S diffuses bacteria ­ metabolizes the H2S gas and oxidize it to sulphuric acid. It is worth noting that Thiobacillus

  4. www.sciencemag.org SCIENCE VOL 334 18 NOVEMBER 2011 915 PERSPECTIVES

    E-Print Network [OSTI]

    Collins, James J.

    the role of endog- enously produced hydrogen sulfide (H2S) gas in bacteria. They found that Gram enzymes that produce H2S, indicating that the gas confers antibiotic tol- erance. H2S elevated

  5. PHYSICAL REVIEW A 85, 043820 (2012) Absolute measurement of the transient optical nonlinearity in N2, O2, N2O, and Ar

    E-Print Network [OSTI]

    Milchberg, Howard

    2012-01-01T23:59:59.000Z

    harmonic generation and attosecond physics [1], femtosecond filamentation [2], and pulse compression [3 by a time-domain Raman response function R(t). The total nonlinear index of refraction, to second order

  6. AC breakdown strength of N2, SF6 and a mixture of N2+SF6 containing a small amount of SF6

    SciTech Connect (OSTI)

    Mardikyan, K.; Kalenderli, O. [Istanbul Technical Univ. (Turkey). Electric-Electronics Faculty; Ersen, O.; Canarslan, E. [Schneider Electric Co., Istanbul (Turkey)

    1996-12-31T23:59:59.000Z

    AC breakdown strengths of N{sub 2}, SF{sub 6} and a mixture of N{sub 2}+SF{sub 6} containing 1% of SF{sub 6} were experimentally studied. For this purpose, 50 Hz AC breakdown voltages in both uniform and non-uniform fields up to a pressure of 400 kPa from 50 kPa were measured. Test results show that the addition of 1% of SF{sub 6} to nitrogen increases the breakdown voltage up to 250 kPa in a non-uniform field. The relative breakdown strength of the mixture with respect to components was also calculated in 50 Hz AC voltage. The analysis of Paschen curves reveals an improvement of 40% in the breakdown strength of mixture in uniform field but in non-uniform fields, the maximum AC breakdown voltage of the mixture is 24% lower than that of pure SF{sub 6}.

  7. Symposium on Laboratory Astrophysics at the CfA

    E-Print Network [OSTI]

    - logues Molecule # of isotopo- logues H2O 6 HCl 2 COF2 1 CO2 8 HBr 2 SF6 1 O3 5 HI 1 H2S 3 N2O 5 ClO 2;11 Molecule Name Molecule Name SF6 Sulfur hexafluoride CHClFCF3 HCFC-124 ClON2O Chlorine nitrate CH3CCl2F HCFC and cross-section files #12;22 #12;#12;24 CClF3 (CFC-13) CCl2F2 (CFC-12) CF4 (CFC-14) SF6 #12;25 #12;

  8. Removal of SO2 from gas streams using a dielectric barrier discharge and combined plasma photolysis

    E-Print Network [OSTI]

    Kushner, Mark

    acid, H2S04, OH + S02+HS0s, k,,=7.4X lo-l2 cm3 s-t, (44 OH + HSOs + H,S04, k4h=9.8x10-12 cm3 s- ;kbRemoval of SO2 from gas streams using a dielectric barrier discharge and combined plasma photolysis 15 January 1991) The removal of SO, from simulated gas streams (N2/OZ/H20/S02) is experimentally

  9. Two-phase compressibility factors for retrograde gases 

    E-Print Network [OSTI]

    Rayes, Daniel George

    1989-01-01T23:59:59.000Z

    . K. , M Cain, W. D. , Jr. and Jennings, J. W. : "An Improved Method for the Determination of the Reservoir Specific Gravity for Retrograde Gases, " JPT (July 1989) 747-752. 7. Craft, B. C. and Hawkins, M. F. : A li P 1 m R rv ir En ine rin...). Variable Mean Standard Deviation Minimum Maximum H2S CO2 N2 CI C2 C3 IC4 NC4 IC5 NC5 C6 C7+ M. W. C7+ S. G. C7+ 1, 01840 0. 00997 0. 02545 0. 01840 0. 73233 0. 07584 0. 03948 0. 00859 0. 01482 0. 00611 0. 00637 0. 00857 0. 05404...

  10. Estimation of Concentrations of Various Species in the Catalyst Phase (Yongkeat, 1996)

    E-Print Network [OSTI]

    Pike, Ralph W.

    .003 litre/litre, H2S04 (0.0007 lb/lb, H2S04 ) as used by Langley and Pike (1972). But this coefficient

  11. THE DEFINITION OF ENGINEERING DEVELOPMENT AND RESEARCH PROBLEMS RELATING TO THE USE OF GEOTHERMAL FLUIDS FOR ELECTRIC POWER GENERATION AND NONELECTRIC HEATING

    E-Print Network [OSTI]

    Apps, J.A.

    2011-01-01T23:59:59.000Z

    emissions might be a Removal of H2S by catalytic oxidationremoval from br i nes Noncondensable gas remova from condensers H2S

  12. Published Ahead of Print 8 March 2013. 10.1128/AEM.00139-13.

    E-Print Network [OSTI]

    Ahmad, Sajjad

    that Hydrogeno- baculum isolates from the spring either oxidized only H2S or cooxidized H2S and H2 concomitantly

  13. Innovative Concepts Phase I: Inorganic Membranes for CO2/N2 Separation

    SciTech Connect (OSTI)

    William Desisto

    2003-09-23T23:59:59.000Z

    Silica membranes were prepared using a novel technique of catalyzed-atomic layer deposition of silica within a mesoporous matrix. Pyridine was used to catalyze the silicon chloride attachment to the hydroxylated silica surface at room temperature. This half-reaction was followed by the hydration of the surface with water regenerating surface hydroxyls and completing one reaction cycle. The technique resulted in the self-limited pore size reduction of the mesoporous matrix to pore sizes near 1 nm. The self-limited reaction was presumed to be the exclusion of the large catalyst molecule from the pore entrance. In addition to pore size reduction, viscous flow defects were repaired without significantly reducing overall porosity of the membrane. In addition, we investigated the ability of amine-functionalization to enhance the CO{sub 2} transport in silica membranes. Specifically, we examined three synthesis techniques for functionalizing silica membranes with amino groups that resulted in different surface chemistries of the silica membranes. These differences were correlated with changes in the CO{sub 2} facilitation characteristics. It was found that high loadings of amino groups where interaction with the silica surface was minimized promoted the highest CO{sub 2} transport.

  14. Noncompact gauging of N=2 7D supergravity and AdS/CFT holography

    E-Print Network [OSTI]

    Parinya Karndumri

    2015-02-02T23:59:59.000Z

    Half-maximal gauged supergravity in seven dimensions coupled to $n$ vector multiplets contains $n+3$ vectors and $3n+1$ scalars parametrized by $\\mathbb{R}^+\\times SO(3,n)/SO(3)\\times SO(n)$ coset manifold. The two-form field in the gravity multiplet can be dualized to a three-form field which admits a topological mass term. Possible non-compact gauge groups take the form of $G_0\\times H\\subset SO(3,n)$ with a compact group $H$. $G_0$ is one of the five possibilities; $SO(3,1)$, $SL(3,\\mathbb{R})$, $SO(2,2)$, $SO(2,1)$ and $SO(2,2)\\times SO(2,1)$. We investigate all of these possible non-compact gauge groups and classify their vacua. Unlike the gauged supergravity without a topological mass term, there are new supersymmetric $AdS_7$ vacua in the $SO(3,1)$ and $SL(3,\\mathbb{R})$ gaugings. These correspond to new $N=(1,0)$ superconformal field theories (SCFT) in six dimensions. Additionally, we find a class of $AdS_5\\times S^2$ and $AdS_5\\times H^2$ backgrounds with $SO(2)$ and $SO(2)\\times SO(2)$ symmetries. These should correspond to $N=1$ SCFTs in four dimensions obtained from twisted compactifications of six-dimensional field theories on $S^2$ or $H^2$. We also study RG flows from six-dimensional $N=(1,0)$ SCFT to $N=1$ SCFT in four dimensions and RG flows from a four-dimensional $N=1$ SCFT to a six-dimensional SYM in the IR. The former are driven by a vacuum expectation value of a dimension-four operator dual to the supergravity dilaton while the latter are driven by vacuum expectation values of marginal operators.

  15. THE ULTRAVIOLET SPECTROSCOPY OF NITROUS OXIDE (N2O): A TEMPERATURE-RESOLVED STUDY

    E-Print Network [OSTI]

    Selwyn, Gary Stewart

    2011-01-01T23:59:59.000Z

    compressors Gaique Laboratory. During this time the Cary also suffered from an intermittent noise problem

  16. COLLOQUE DE PHYSIQUE Colloque C2, supplment au n*2. Tome 51, Fvrier 1990 ,,_ ,, 7

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    TURBINES À GAZ P. WETTA METRAVIB R . D . S . , Département Acoustique, 64 Chemin d e s M o u i l l e s , BP coordonnées cylindriques, ont été appliquées à la surveillance acoustique de turbines à gaz et ont montré avec turbines à gaz. Dans ce domaine en effet la demande de systèmes de surveillance fiables et performants est

  17. JOURNAL DE PHYSIQUE Colloque Cl, supplment au n2. Tome 47, fvrier 1986 page ci-919

    E-Print Network [OSTI]

    Boyer, Edmond

    OF THE DIFFUSION OF OXYGEN ON THE AGING OF ZINC OXIDE-BASED VARISTORS D. BINESTI, J.-P. BONNET, M. ONILLON and R of zinc oxide-based varistors has been studied at 650°C in CO-CO, mixtures in order to correlate ageing. I - INTRODUCTION The zinc oxide-based varistors exhibit a marked non-linearity in their current vs

  18. JOURNAL DE PHYSIQUE Colloque CI, supplement au n2. Tome 47, fevrier 1986 page cl-861

    E-Print Network [OSTI]

    Boyer, Edmond

    are particularly important in the case of cobalt-doped zinc oxide, which is the major phase in varistor materials energy levels in the forbidden band. I - INTRODUCTION Zinc oxide is a n-type semiconductor with a large la structure wurtzite de l'oxyde de zinc à la formation de deux niveaux d'énergie dans la bande

  19. Structures, Energetics and Spectroscopic Fingerprints of Water Clusters n = 2-24

    SciTech Connect (OSTI)

    Yoo, Soohaeng; Xantheas, Sotiris S.

    2012-01-01T23:59:59.000Z

    Water's function as a universal solvent and its role in mediating several biological functions that are responsible for sustaining life has created tremendous interest in the understanding of its structure at the molecular level.1 Due to the size of the simulation cells and the sampling time needed to compute many macroscopic properties, most of the initial simulations are performed using a classical force field whereas several processes that involve chemistry are subsequently probed with electronic structure based methods. A significant effort has therefore been devoted towards the development of classical force fields for water.2 Clusters of water molecules are useful in probing the intermolecular interactions at the microscopic level as well as providing information about the subtle energy differences that are associated with different bonding arrangements within a hydrogen bonded network. They moreover render a quantitative picture of the nature and magnitude of the various components of the intermolecular interactions such as exchange, dispersion, induction etc. They can finally serve as a vehicle for the study of the convergence of properties with increasing size.

  20. Understanding denitrification with stable isotope measurements of N2: proof of concept study

    E-Print Network [OSTI]

    Downer, Roswell Curtis

    2004-01-01T23:59:59.000Z

    The biologically mediated removal of nitrogen from estuarine and shallow coastal waters was investigated using a new method for the determination of N? isotope ratios. This method employs the use of a chromatographic separation technique to purify...

  1. A comparison of three learning methods to predict N2O fluxes and N leaching

    E-Print Network [OSTI]

    Boyer, Edmond

    leaching; the first indicator is a powerful greenhouse gas and the second one is an important source

  2. Unlocking the Standard Model. IV. N=2 generations of quarks : spectrum and mixing

    E-Print Network [OSTI]

    Machet, Bruno

    2013-01-01T23:59:59.000Z

    The Glashow-Salam-Weinberg model for 2 generations of quarks is extended to 8 composite Higgs multiplets, with no adjunction of extra fermions. It is the minimal number of Higgs doublets required to suitably account, simultaneously, for the spectrum of pseudoscalar mesons that can be built with 4 quarks and for the mass of the W gauge bosons. These masses being used as input, together with elementary low energy considerations for the pions, we calculate all other parameters, masses and couplings. We focus in this work on the spectrum of the 8 Higgs bosons (which all potentially contribute to the W and quark masses), and on the mixing (Cabibbo) angle, leaving the study of couplings to a subsequent work. The Higgs bosons fall into one triplet, two doublets and one singlet. In the triplet stand three states with masses \\sqrt{2} x that of heaviest pseudoscalar meson D_s, which, for 2 generations, pushes them up to 2.80 GeV. The 2 components of the first doublet have masses close to 1.25 GeV. The singlet has a mas...

  3. Synthesis and Characterization of Th2N2(NH) Isomorphous to Th2N3

    SciTech Connect (OSTI)

    Silva, G W Chinthaka M [ORNL; Yeamans, Charles B. [University of California, Berkeley; Hunn, John D [ORNL; Sattelberger, Alfred P [Argonne National Laboratory (ANL); Czerwinski, Ken R. [University of Nevada, Las Vegas; Weck, Dr. Phil F [University of Nevada, Las Vegas

    2012-01-01T23:59:59.000Z

    Using a new, low-temperature, fluoride-based process, thorium nitride imide of the chemical formula Th{sub 2}N{sub 2}(NH) was synthesized from thorium dioxide via an ammonium thorium fluoride intermediate. The resulting product phase was characterized by powder X-ray diffraction (XRD) analysis and was found to be crystallographically similar to Th{sub 2}N{sub 3}. Its unit cell was hexagonal with a space group of P3m{bar 1} and lattice parameters of a = b = 3.886(1) and c = 6.185(2) {angstrom}. The presence of -NH in the nitride phase was verified by Fourier transform infrared spectroscopy (FTIR). Total energy calculations performed using all-electron scalar relativistic density functional theory (DFT) showed that the hydrogen atom in the Th{sub 2}N{sub 2}(NH) prefers to bond with nitrogen atoms occupying 1a Wyckoff positions of the unit cell. Lattice fringe disruptions observed in nanoparticle areas of the nitride species by high-resolution transmission electron microscopic (HRTEM) images also displayed some evidence for the presence of -NH group. As ThO{sub 2} was identified as an impurity, possible reaction mechanisms involving its formation are discussed.

  4. JOURNAL DE PHYSIQUE Colloque Cl, supplment au n2, Tome 47, fvrier 1986 page cl-907

    E-Print Network [OSTI]

    Boyer, Edmond

    ) and low dielectric losses ( 10-4) at high frequency. The number of presently available materials is quite. It undergoes a reversible Article published online by EDP Sciences and available at http://dx.doi.org/10-ray patterns of the two varieties, as do the orthorhombic LngSb07 ones, show strong lines charac- t e r i s t i

  5. Multistep N2 Breathing in the Metal-Organic Framework Co(1,4-benzenedipyrazolate)

    E-Print Network [OSTI]

    to external stimuli can render them excellent candidates as sensors for the evalu- ation of adsorbent. Variable-temperature magnetic susceptibility measurements and in situ infrared and UV-vis-NIR spectroscopic

  6. Anales de Desclasificacin / Vol. 1: La derrota del rea cultural n 2 / 2006 Rebeliones en Araucana

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    constitución de la propiedad rural en la novena región entre los años 1900-1915. - Temuko: Universidad de Chile desarrollo de una agricultura extensiva y moderna­ de territorios recién conquistados militarmente. Se

  7. A Calcium Coordination Framework Having Permanent Porosity and High CO2/N2 Selectivity

    SciTech Connect (OSTI)

    Banerjee D.; Parise J.; Zhang, Z.; Plonka, A.M.; Li, J.

    2012-03-15T23:59:59.000Z

    A thermally stable, microporous calcium coordination network shows a reversible 5.75 wt % CO{sub 2} uptake at 273 K and 1 atm pressure, with an enthalpy of interaction of {approx}31 kJ/mol and a CO{sub 2}/N{sub 2} selectivity over 45 under ideal flue gas conditions. The absence of open metal sites in the activated material suggests a different mechanism for selectivity and high interaction energy compared to those for frameworks with open metal sites.

  8. asanka chisso n2o: Topics by E-print Network

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

    with low advective stream input and strong-0636828. Logistic support was provided by Raytheon Polar Services and Petroleum Helicopters Inc Priscu, John C. 104 Short-term effects...

  9. Transported PDF Modeling of Nonpremixed Turbulent CO/H-2/N-2 Jet Flames

    SciTech Connect (OSTI)

    Zhao, xinyu; Haworth, D. C.; Huckaby, E. David

    2012-01-01T23:59:59.000Z

    Turbulent CO/H{sub 2}/N{sub 2} (“syngas”) flames are simulated using a transported composition probability density function (PDF) method. A consistent hybrid Lagrangian particle/Eulerian mesh algorithm is used to solve the modeled PDF transport equation. The model includes standard k–? turbulence, gradient transport for scalars, and Euclidean minimum spanning tree (EMST) mixing. Sensitivities of model results to variations in the turbulence model, the treatment of radiation heat transfer, the choice of chemical mechanism, and the PDF mixing model are explored. A baseline model reproduces the measured mean and rms temperature, major species, and minor species profiles reasonably well, and captures the scaling that is observed in the experiments. Both our results and the literature suggest that further improvements can be realized with adjustments in the turbulence model, the radiation heat transfer model, and the chemical mechanism. Although radiation effects are relatively small in these flames, consideration of radiation is important for accurate NO prediction. Chemical mechanisms that have been developed specifically for fuels with high concentrations of CO and H{sub 2} perform better than a methane mechanism that was not designed for this purpose. It is important to account explicitly for turbulence–chemistry interactions, although the details of the mixing model do not make a large difference in the results, within reasonable limits.

  10. ~~"jr..TT-."';\\"fli" ~n~/ 2/3/67

    E-Print Network [OSTI]

    Rathbun, Julie A.

    that the solar cell load resistor Rs was changed from 1· 37.fL to l· O.f'Lto minimi ze .the effect of temperature on the output of the solar cell (ke e ping it ope rating above the "knee ' in the constant cur- rent region up, but in the worst region, it is considered large enough to r e quire individual calibration curves for each

  11. The Tiffany Unit N2 - ECBM Pilot: A Reservoir Modeling Study

    SciTech Connect (OSTI)

    Scott Reeves; Anne Oudinot

    2004-03-31T23:59:59.000Z

    In October, 2000, the U.S. Department of Energy, through contractor Advanced Resources International, launched a multi-year government-industry R&D collaboration called the Coal-Seq project. The Coal-Seq project is investigating the feasibility of CO{sub 2} sequestration in deep, unmineable coalseams, by performing detailed reservoir studies of two enhanced coalbed methane recovery (ECBM) field projects in the San Juan basin. The two sites are the Allison Unit, operated by Burlington Resources, and into which CO{sub 2} is being injected, and the Tiffany Unit, operating by BP America, into which N{sub 2} is being injected (the interest in understanding the N{sub 2}-ECBM process has important implications for CO{sub 2} sequestration via flue-gas injection). The purposes of the field studies are to understand the reservoir mechanisms of CO{sub 2} and N{sub 2} injection into coalseams, demonstrate the practical effectiveness of the ECBM and sequestration processes, demonstrate an engineering capability to model them, and to evaluate sequestration economics. In support of these efforts, laboratory and theoretical studies are also being performed to understand and model multi-component isotherm behavior, and coal permeability changes due to swelling with CO{sub 2} injection. This report describes the results of an important component of the overall project, the Tiffany Unit reservoir modeling study. The Tiffany Unit is located in the northern portion of the prolific San Juan basin (in Southern Colorado). The study area consists of 34 methane production wells and 12 nitrogen injection wells. The field originally began production in 1983, and N{sub 2} injection operations for ECBM purposes commenced in 1998. Nitrogen injection was suspended in 2002, to evaluate the results of the pilot. In this study, a detailed reservoir characterization of the field was developed, the field history was matched using the COMET3 reservoir simulator, and future field performance was forecast under various operating conditions. Based on the results of the study, the following major conclusions have been drawn: (1) The injection of N{sub 2} at the Tiffany Unit has resulted in incremental methane recovery over estimated primary recovery, in approximate proportion of one volume of methane for every 0.4 volumes of injected nitrogen on a net basis. In the swept areas, an incremental methane recovery of approximately 20% of original-gas-in-place resulted from N{sub 2}-ECBM operations. (2) At the prevailing gas prices at the time the project was implemented ({approx}2.20/Mcf), and not considering any tax credit benefits, the pilot itself was uneconomic. However, with today's gas prices of {approx}$4.00/Mcf, N{sub 2}-ECBM appears economically attractive. (3) Performance predictions of future injection suggests CO{sub 2} sequestration can be accomplished at a slight profit. Economic performance is enhanced by adding some N{sub 2} to the injectant.

  12. COLLOQUE DE PHYSIQUE Colloque C2, supplment au n2, Tome 51, Fvrier 1990

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    is used to describe the Doppler effect due to a target moving with a constant velocity on a rectilinear la trajectoire. La vitesse radiale dépendant du temps, la fréquence Doppler, fréquence de l trajectory, the transmitter receiver beeing off this trajectory. The radial velocity beeing time

  13. Appearance Potentials and Kinetic Energies of Ions from N2, CO, and NO

    E-Print Network [OSTI]

    Hierl, Peter M.; Franklin, J. L.

    1967-01-01T23:59:59.000Z

    A recently developed method has permitted the measurement of excess translational energy of ions formed in a time?of?flight mass spectrometer. The method, in conjunction with the RPD technique for determining appearance potentials, has been applied...

  14. Holographic Dark Energy with Time Varying n^2 Parameter in Non-Flat Universe

    E-Print Network [OSTI]

    Bushra Majeed; Mubasher Jamil; Azad A. Siddiqui

    2014-11-01T23:59:59.000Z

    We consider a holographic dark energy model, with a varying parameter, n, which evolves slowly with time. We obtain the differential equation describing evolution of the dark energy density parameter, $\\Omega_d$, for the flat and non-flat FRW universes. The equation of state parameter in this generalized version of holographic dark energy depends on n.

  15. King Air N2UW flight report for December 10, 2004 Crew: Fagerstrom, Vali, Oolman, Glover

    E-Print Network [OSTI]

    Vali, Gabor

    and intercomparison with the C130, followed by cloud sampling on a bowtie pattern in close range to SPOL: The bowtie pattern was fixed by two points, one E and one W of SPOL. Heading N from each point about 5 NM and then turning to the opposite end of the line formed the bowtie. Deviations to maximize incloud time were made

  16. Materials Data on Ca3N2 (SG:194) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2014-11-02T23:59:59.000Z

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  17. Materials Data on Ca3N2 (SG:164) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2014-11-02T23:59:59.000Z

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  18. STATISTICA INFERENZIALE SHEDA N. 2 INTERVALLI DI CONFIDENZA PER IL VALORE ATTESO E LA FREQUENZA

    E-Print Network [OSTI]

    Rogantin, Maria Piera

    determinare il prezzo medio l'ISTAT (Istituto Nazionale di Statistica) effettua un campionamento su vari negozi della regione, tenendo conto della dislocazione geografica, del tipo di distribuzione . Sappiamo, inoltre, che X ha ancora distribuzione normale: ( ,2.25).X N Vogliamo determinare tale che ( )P

  19. Lean NOx Trap Regeneration Selectivity Towards N2O -- Similarities and

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetter Report:40PMDepartment ofs o u t h e a s t

  20. Reversible CO Binding Enables Tunable CO/H2 and CO/N2 Separations in

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch > TheNuclear Press ReleasesIn theTreatment in a Metal-Organic Framework

  1. Selective Catalytic Oxidation (SCO) of NH3 to N2 for Hot Exhaust Treatment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretary of Energy Advisory BoardSecuringSee theEnergy3at the|

  2. N2O Emissions From 2010 SCR Systems | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in Many Devils Wash, Shiprock, New Mexico |Myriant SuccinicN E W U T

  3. May 28, 2012 Organic Seminar

    E-Print Network [OSTI]

    Katsumoto, Shingo

    . Importance of as the alternative for H2S 3. Developments in this study Introductions 3 #12;Tetrahydrothiophenes (THTs) in natural products Biotin (Vitamin B7) Salaprinol Breynin B 4 #12;The alternative for H2S Usual method to synthesize thioethers H2S is a highly toxic gas. NaSH and Na2S generate H2S by exposure

  4. IOP PUBLISHING MEASUREMENT SCIENCE AND TECHNOLOGY Meas. Sci. Technol. 18 (2007) 13151320 doi:10.1088/0957-0233/18/5/017

    E-Print Network [OSTI]

    Zhang, WJ "Chris"

    2007-01-01T23:59:59.000Z

    Published 13 March 2007 Online at stacks.iop.org/MST/18/1315 Abstract To measure hydrogen sulfide (H2S for advancing our understanding of the biological role of H2S. Traditional H2S measurements usually need large tissue samples and complex procedures. However, H2S concentration is very low in human bodies

  5. Synthesis and properties of green phosphor SrGa2S4:Eu2 emission displays by an environmentally clean technique

    E-Print Network [OSTI]

    Wang, Zhong L.

    sulfide (H2S) or carbon disulfide (CS2) [6­10]. Since H2S is a very toxic gas and can cause serious technique to prepare calcium and europium thiogallates. In their method H2S was replaced by inert Ar gas of this technique is that the toxic H2S gas is replaced by Ar gas, eliminating environmental hazard

  6. Twoendemicandendangeredfishes,Poeciliasulphuraria (Alvarez, 1948) and Gambusia eurystoma Miller, 1975

    E-Print Network [OSTI]

    Schlupp, Ingo

    for P. sulphuraria quickly lost motion control, probably because of the toxic properties of H2S sulphide (H2S) can be considered islands. The H2S competes with oxygen in the respiratory chain to tolerate the toxic effects of H2S in the long term and to permanently inhabit sulphurous habitats

  7. Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report II.C Fossil-Based

    E-Print Network [OSTI]

    , noncatalytic decomposition of hydrogen sulfide (H2S) in H2S-rich waste streams into hydrogen and elemental at an industrial site. Approach · Develop a numerical model for the superadiabatic H2S decomposition reactor viability of the concept. · Designed and constructed a state-of-the-art superadiabatic H2S decomposition

  8. The author(s) is solely responsible for the content of this technical presentation. The technical presentation does not necessarily reflect the official position of ASAE, and its printing and distribution does not constitute an endorsement of views

    E-Print Network [OSTI]

    Ni, Jiqin "Jee-Chin"

    Springs Resort Orlando, Florida July 12-16, 1998 Summary: Hydrogen sulfide (H2S) concentration or recorded from June to September. Average daily mean (ADM) indoor H2S concentration was 173±21 ppb ranging from 38 to 536 ppb. The highest recorded 12-min H2S concentration was 1,624 ppb. The ADM H2S emission

  9. The author(s) is solely responsible for the content of this technical presentation. The technical presentation does not necessarily reflect the official position of ASAE, and its printing and distribution does not constitute an endorsement of views

    E-Print Network [OSTI]

    Ni, Jiqin "Jee-Chin"

    , Ontario Canada July 18-22, 1999 Summary: Hydrogen sulfide (H2S) concentrations in two large, mechanically the temporal and spatial variations of H2S concentrations in the buildings. Average daily mean building H2S of H2S concentrations occurred as daily mean building concentrations ranged from 18 to 1,107 ppb

  10. The effects of vibrational mode and collision energy on the reaction of formaldehyde cation with carbonyl sulfide

    E-Print Network [OSTI]

    Anderson, Scott L.

    , producing H2S . Both H2 transfer and H2S channels are strongly inhibited by Ecol and vibrational excitation important exoergic channel is pro- duction of H2S 2 CO referred to as ``H2S '' . Finally, endoergic charge was in a flow tube,5 and only the PT, HPT, and H2S channels were observed. The collision and vibrational energy

  11. Project 2012: Increasing Female Representation in Government

    E-Print Network [OSTI]

    McLean, Lindsey

    2011-01-01T23:59:59.000Z

    Slovenia Ukraine Hungary Croatia Bosnia and Herzegovina Rep.HG) Chile (HS/HG) Croatia (HG) Finland (HS) Germany (HG)

  12. Discovery of the secondary star of the HgMn binary kappa Cancri

    E-Print Network [OSTI]

    T. Ryabchikova; O. Kotchoukhov; G. Galazutdinov; F. Musaev; S. J. Adelman

    1998-05-12T23:59:59.000Z

    A careful investigation of a CCD spectrum of the SB1 system kappa Cnc in the spectral region 3800 A - 8000 A resulted in the discovery of the lines of the secondary star. We then analyzed several short-wavelength range Reticon spectra obtained at different orbital phases to find additional radial velocities. The mass ratio is m_A/m_B = 2.2 +- 0.1 and, from binary spectrum-synthesis, the ratio of radii is R_A/R_B >= 2.

  13. H.G. Kirk May 31, 2007 MERIT Pulsed Solenoid Status

    E-Print Network [OSTI]

    McDonald, Kirk

    with cryo experts at BNL led us to consider an alternative sealant material know as Gore-Tex Joint Sealant precisely the environment of the electrical leads penetrations at both room temperature and 800 K A testing-bar gaseous He at both cryogenic and room temperatures. This exceeds the expected operating conditions

  14. creasing Hg2 concentration. After correcting for the initial shift caused by the new environment,

    E-Print Network [OSTI]

    Garzione, Carmala N.

    , the response of cell-bound DNA-SWNTs fits the model curve created by the same complexes in pure buffer (Fig. 3C mamma- lian cells creates opportunities for new mo- lecular probes that operate in the near IR and avoid-SWNTs and inserted into whole blood and muscle tissue. The complex was added directly to a black dye solution (op

  15. Elsevier Science 1 A Free Jet Hg Target Operating In a High Magnetic Field

    E-Print Network [OSTI]

    McDonald, Kirk

    University, Massachusetts Institute Of Technology, European Organization for Nuclear Research system and the mercury to CERN, decommissioning the experiment, and returning the mildly activated

  16. Microbial pathways for the mobilization of mercury as Hg(O) in anoxic subsurface environments

    SciTech Connect (OSTI)

    Barkay, Tamar

    2005-06-01T23:59:59.000Z

    The goal of our project which was initiated in June 2005 is focused on the presence of merA in microbial communities of anoxic environments and the effect of anaerobic respiratory pathways on MR expression and activities. The following progress has been made to date: PCR primers were designed to span the known phylogenetic range of merA genes of Gram-negative bacteria. In control experiments, these primers successfully amplified a 288 bp region at the 3? end of previously characterized merA genes from Shewanella putrefaciens pMERPH, Acidithiobacillus ferrooxidans, Pseudomonas stutzeri pPB, Tn5041, Pseudomonas sp. K-62, and Serratia marcescens pDU1358.

  17. Materials Data on Li2HgGe (SG:225) by Materials Project

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

    Kristin Persson

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  18. Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells

    SciTech Connect (OSTI)

    Bernevig, A.

    2010-03-02T23:59:59.000Z

    We show that the quantum spin Hall (QSH) effect, a state of matter with topological properties distinct from those of conventional insulators, can be realized in mercury telluride-cadmium telluride semiconductor quantum wells. When the thickness of the quantum well is varied, the electronic state changes from a normal to an 'inverted' type at a critical thickness d{sub c}. We show that this transition is a topological quantum phase transition between a conventional insulating phase and a phase exhibiting the QSH effect with a single pair of helical edge states. We also discuss methods for experimental detection of the QSH effect.

  19. An Optical Offgas Sensor Network Incorporating a HG Cavity Ringdown Spectrometer and IR Diode Lasers

    SciTech Connect (OSTI)

    George P. Miller

    2007-12-30T23:59:59.000Z

    A multi-element cavity ringdown system was evaluated with the objective of developing an intelligent sensor network to be incorporated into the control systems for advanced coal combustion facilities. Using a combination of a YAG-pumped dye laser and a tunable NIR/IR laser a dual cavity was constructed and a labview program was developed to provide multi-channel, real-time data to permit the real-time monitoring of typical exhaust emission gases, (for example: CO{sub 2}, SO{sub 2}, and mercury) of concern to the next generation of coal-powered facilities.

  20. H-G Diagram Based Rotor Parameters Identification for Induction Motors Thermal Monitoring

    E-Print Network [OSTI]

    Brest, Université de

    technique. The process should be refined for a possible industrial application. Keywords: Induction motor, H at the stator slots. The actual trends for thermal monitoring of an induction motor is achieved without thermal-time processing of the induction motor state saturation and temperature for each operating point. The distinct

  1. Characterization of a Large Format HgCdTe on Si Focal Plane Array

    E-Print Network [OSTI]

    Figer, Donald F.

    . Keasler2 Rochester Institute of Technology 1 , Raytheon Vision Systems 2 ABSTRACT The Center for Detectors (CfD) at the Rochester Institute of Technology (RIT) and Raytheon Vision Systems (RVS) are advancing. The Center for Detectors (CfD) at the Rochester Institute of Technology (RIT) and Raytheon Vision Systems

  2. A Solid-State 199Hg NMR Study of Mercury Halides

    E-Print Network [OSTI]

    Taylor, Robert E; Bai, Shi; Dybowski, Cecil

    2011-01-01T23:59:59.000Z

    550 (1998), 89-99. [25] R. E. Taylor, C. T. Carver, R. E.7 (1997), 333-336. [33] R. E. Taylor, Concepts Magn. Reson.Study of Mercury Halides R. E. Taylor 1 *, Shi Bai 2 , and

  3. Materials Data on TmHg (SG:221) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2014-11-02T23:59:59.000Z

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  4. Materials Data on NdHg2 (SG:191) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2014-11-02T23:59:59.000Z

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  5. Do people always pay less than they say? Testbed laboratory experiments with IV and HG values

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    and real economic commitments undercuts the basic foundations of popular stated preference valuation methods used in cost-benefit analyses. The accumulated evidence, from the lab and field, leads Harrison

  6. 2 Toxicity and Sources of Pb, Cd, Hg, Cr, As, and Radionuclides

    E-Print Network [OSTI]

    Volesky, Bohumil

    ......................................................................................................... 22 2.1.2.1 Uranium ................................................................................................ 35 2.3.1.1 Chemistry of Acid Mine Water

  7. RATIO OF THE AL+ AND HG+ OPTICAL CLOCK FREQUENCIES TO 17 DECIMAL PLACES

    E-Print Network [OSTI]

    . ROSENBAND, D. B. HUME, P. O. SCHMIDT,t C. W. CHOU, A. BRUSCH,+ L. LORlNI,§ W. H. OSKAY,'lJ R. E. DRULLINGER of standards are based on single ions confined in Paul traps, but differ in the methods used to prepare

  8. The Secondary Star of the HgMn Binary Phi Her

    E-Print Network [OSTI]

    M. M. Dworetsky; Rosemary Willatt

    2006-12-15T23:59:59.000Z

    The binary nature of the bright (V = 4.2 mag) Mercury-Manganese star Phi Her has been known since 1976 and it was considered a low-amplitude single-lined SB. In a recent study we found evidence for lines of the secondary star. Other recent results from interferometry provide a good measure of the light ratio. It is very plausible that the secondary is a late main-sequence A star. We find the rotational velocity of the secondary to be ~42 +/- 5 km/s.

  9. Concentrations of PCBs and Hg in soils, sediments and water in the urbanized Bay

    E-Print Network [OSTI]

    management. A technical report of the Watershed Program. SFEI Contribution 608. San Francisco Estuary hypothesis that pollutant concentrations are elevated in specific parts of the urban landscape. 1. Pollutant) events and processes. 2. Concentrations at sites within 3 km of one another exhibit spatial

  10. H.G. Rickover, 1964 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron4(SC) MappingOctober 12,U.S. DOEGasH.G. Rickover, 1964 The Enrico

  11. CORRLATION ANGULAIRE DES NEUTRONS MIS DANS LES RACTIONS 9Be(n, 2n)8Be ET 209Bi(n, 2n)208Bi A 14 MeV

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    .), AECL, 1961, n° 32. RETHMEIER (J.), Thèse, Amsterdam, 1961. RETHMEIER (J.), JONKER (C. C.), RODENBURG (M

  12. Modulo di Matematica, Prova scritta parziale n. 2, 27 Novembre 2003 Corso di laurea in Tecnica Vivaistica

    E-Print Network [OSTI]

    Bianchi, Gabriele

    compresa tra l'asse delle x e il grafico della funzione y = x3 + x2 - 6x (vedi figura)(attenti al segno rotazione ottenuto ruotando intorno all'asse x l'insieme delimitato dall'asse x e dal grafico della funzione

  13. Brady et al. Geological Materials Research v.1, n.2, p.1 Copyright 1998 by the Mineralogical Society of America

    E-Print Network [OSTI]

    Brady, John B.

    ) and several major talc mines were in operation in the 1990's. Olson (1976) and Berg (1979) described , Chris Green2 , Mathieu Duvall3 , Ari Kogut4 Lewis Kaufman5 , Dana Kovaric1 Departments of Geology: 1 of America Introduction Talc has been mined in southwest Montana for over fifty years (Olson, 1976

  14. C NMR Reveals No Evidence of n2p* Interactions in Bradley Worley, Georgia Richard, Gerard S. Harbison, Robert Powers*

    E-Print Network [OSTI]

    Powers, Robert

    residues is generally considered a major driving force in protein folding [6] and has been predicted]. Despite these observations, a satisfying general mechanism for protein folding has not been described [9,10]. This implies that our understanding of the factors involved in protein folding and stability is incomplete

  15. JOURNAL DE PHYSIQUE Colloque C2, supplment au n2, Tome *6, fvrier 1985 page C2-713

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    OF POLARIZED PROTONS IN SppS AND OTHER HIGH ENERGY HADRON COLLIDERS* E.D. Courant Brookhaven National-350 0.8, 14-30 Tevatron (FNAL) pp 800-1000 10, 150 RHIC (BNL) p-ion 250-350 20-30 HERA (DESY) e-p 850 40. 3. Traversal of polarization resonances in booster synchrotrons (up to 15-70 GeV). 4. Elimination

  16. COLLOQUE DE PHYSIQUE Colloque C2, supplment au n"2. Tome 51, Fvrier 1990 C2-221

    E-Print Network [OSTI]

    Boyer, Edmond

    ://dx.doi.org/10.1051/jphyscol:1990253 #12;COLLOQUE DE PHYSIQUE avec + 1 v(bords)= $+cl1a[J(a, 1) + w2 (a,- da+ 1 I

  17. Ambient Measurements of the NOx Reservoir Species N2O5 using Cavity Ring-down Spectroscopy 

    E-Print Network [OSTI]

    Geidosch, Justine Nicole

    2012-10-19T23:59:59.000Z

    The regulated control of pollutants is essential to maintaining good air quality in urban areas. A major concern is the formation of tropospheric ozone, which can be especially harmful to those with lung conditions and has been linked...

  18. Physisorption of N2, O2, and CO on Fully Oxidized TiO2(110)....

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

    equal (0.75 ± 0.05) and approximately independent of coverage suggesting that adsorption occurs via a precursor mediated mechanism. Excluding multilayer coverages, the TPD...

  19. Revista Electrnica de Enseanza de las Ciencias Vol. 2 N 2 (2003) Metalibros: La construccin colectiva de un recurso

    E-Print Network [OSTI]

    Campanario, Juan Miguel

    Revista Electrónica de Enseñanza de las Ciencias Vol. 2 Nº 2 (2003) Metalibros: La construcción Internet Juan Miguel Campanario Grupo de Investigación sobre Aprendizaje de las Ciencias. Departamento de enseñanza de las ciencias. Palabras clave: Libros de texto, nuevas tecnologías, renovación educativa

  20. Catalytic oxidative coupling of methane over Li/MgO using N2O as an oxidant 

    E-Print Network [OSTI]

    Yamamoto, Hiroshi

    1992-01-01T23:59:59.000Z

    be attributed to the C-H bond cleavage. A low selectivity for COv (A e. high ethane and ethylene selectivity), was observed when the CH~/NvO ratio was large. The condition where a small amount of CO~ was observed corresponds to the region in which oxygen... formation over Li/MgO while CH was kepi. at about, 30 kpa. . . 36. The influence of N 0 on the rate of CO~ formation over Li/MgO whde CH was kept at about 10 kPa. . . 37. The influence of CH on the rate of CO~ formation over Li/MgO while NvO was kept...

  1. JOURNAL DE PHYSIQUE Colloque C2, supplment au n2, Tome 46, fvrier 1985 page C2-95

    E-Print Network [OSTI]

    Boyer, Edmond

    for Theoretical Physics, Trieste Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Trieste

  2. The structure and electrochemical behavior of nitrogen-containing nanocrystalline diamond films deposited from CH4/N2/Ar mixtures.

    SciTech Connect (OSTI)

    Chen, Q.; Gruen, D. M.; Krauss, A. R.; Corrigan, T. D.; Swain, G. M.; Utah State Univ.; Northwestern Univ.

    2001-01-01T23:59:59.000Z

    Electrically conductive nanocrystalline diamond films (approximately 750 to 1000 nm thick) were deposited on conducting Si and W substrates from CH{sub 4}/N{sub 2}/Ar gas mixtures using plasma-enhanced chemical vapor deposition. Such films are continuous over the surface and nanometer smooth. The grain size is 3 to 10 nm, and the grain boundaries are 0.2 to 0.5 nm wide (two carbon atoms). Nitrogen appears to substitutionally insert into the grain boundaries and the film concentration ({approx}10{sup 20} atom/cm{sup 3}) scales with the N{sub 2} added to the source gas mixture up to about the 5% level. The nitrogen-incorporated films are void of pinholes and cracks, and electrically conducting due in part to the high concentration of nitrogen impurities and or the nitrogen-related defects (sp{sup 2} bonding). The films possess semimetallic electronic properties over a potential range from at least -1.5 to 1.0 V vs. SCE. The electrodes, like boron-doped microcrystalline diamond, exhibit a wide working potential window, a low background current, and high degree of electrochemical activity for redox systems such as Fe(CN)6{sup -3/-4}, Ru(NH{sub 3}6{sup +3/+2}), IrCl6{sup -2/-3}, and methyl viologen (MV{sup +2/+}). More sluggish electrode kinetics are observed for 4-methylcatechol, presumably due to weak adsorption on the surface. Apparent heterogeneous electron transfer rate constants of 10{sup -2} to 10{sup -1} cm/s are observed for Fe(CN)6{sup -3/-4}, Ru(NH{sub 3})6{sup +3/+2}, IrCl6{sup -2/-3}, and MV {sup +2/+} at films without any pretreatment.

  3. Experimental and quantum mechanics investigations of early reactions of monomethylhydrazine with mixtures of NO2 and N2O4

    E-Print Network [OSTI]

    Goddard III, William A.

    States b Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Hypergolic bipropellants are fuel-oxidizer combinations that ignite spontaneously upon mixing at ambient it important to develop computa- tional fluid dynamics (CFD) models to gain insight into the influ- ence

  4. International Journal of Structural Changes in Solids (IJSCS), 2, N2, (2010), Materials with a desired refraction coefficient can

    E-Print Network [OSTI]

    and discussed. The desired refraction coefficient can be complex-valued. This means that the enrgy absorption

  5. BANDO n. 2/2012 PER IL RECLUTAMENTO DI UN RICERCATORE CON RAPPORTO DI LAVORO A TEMPO DETERMINATO TIPOLOGIA A

    E-Print Network [OSTI]

    Guidoni, Leonardo

    processi enzimatici, alla caratterizzazione termodinamica di complessi di inclusione di tipo host-guest. Un

  6. Beam foil spectroscopy of N = 3 to N = 2 transitions in highly stripped heavy ions. Revision 1

    SciTech Connect (OSTI)

    Dietrich, D.D.; Chandler, G.A.; Egan, P.O.; Ziock, K.P.; Mokler, P.H.; Reusch, S.; Hoffmann, D.H.H.

    1986-09-01T23:59:59.000Z

    The spectroscopy of very highly ionized atoms provides an important testing ground for multi-electron atomic theory. We report preliminary experimental results on the n = 3 ..-->.. 2 spectra of Bi/sup +73/ and A/sup +69/ obtained at the GSI UNILAC accelerator. 19 refs., 4 figs.

  7. Uni t mi xt e de r echer che 5821 CNRS-I N2P3 / UJF / I NPG

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to the classical fourth generation reactors such as the European Fast Reactor. Indeed molten salt reactors have). They could be reactors without graphite moderator which neutron spectrum reaches fast spectrum. Those kinds RETRAITEMENT DES DECHETS DU T.M.S.R (Thorium Molten Salt Reactor) Xavier Doligez, Michel Allibert, Véronique

  8. 266 CHIL. J. AGRIC. RES. -VOL. 70 -N 2 -2010 VARIABILITY OF SOIL TYPES IN WETLAND MEADOWS IN THE SOUTH

    E-Print Network [OSTI]

    Hédl, Radim

    IN THE SOUTH OF THE CHILEAN PATAGONIA Ladislava Filipová1* , Radim Hédl2 , and Nilo Covacevich C.3 ABSTRACT Patagonia are productive and intensively exploited ecosystems. However, there is scarce data about and canyons of Patagonia, produced by the fusion of Pleistocene glaciers, there are wetland meadows locally

  9. Embedding into the rectilinear plane in optimal O(n2 Nicolas Catusse, Victor Chepoi, and Yann Vax`es

    E-Print Network [OSTI]

    Chepoi, Victor

    , and Yann Vax`es Laboratoire d'Informatique Fondamentale, Universit´e d'Aix-Marseille, Facult´e des Sciences de Luminy, F-13288 Marseille Cedex 9, France {catusse,chepoi,vaxes}@lif.univ-mrs.fr Abstract

  10. 109Agrociencia. (2006) Vol. X N 2 pg. 109 -124 FORESTACIN EN PASTIZALES: HACIA UNA VISIN INTEGRAL DE

    E-Print Network [OSTI]

    Jackson, Robert B.

    2006-01-01T23:59:59.000Z

    posiblemente por el inminente comercio de bonos de carbono. Evaluamos como esta transformación afecta la preexisting and original information on their influence on biomass production, water dynamics, and nutrient

  11. Design of a Metal-Organic Framework with Enhanced Back Bonding for Separation of N2 and CH4

    E-Print Network [OSTI]

    with a considerably higher enthalpy of adsorption for dinitrogen than for methane, based on strong selective back methane-rich gases. This is an extraordinarily difficult separation based on physical properties alone,*,, and Laura Gagliardi*,, Department of Chemical and Biomolecular Engineering, University of California

  12. GAS HYDRATE EQUILIBRIA FOR CO2-N2 AND CO2-CH4 GAS MIXTURES, EXPERIMENTS AND MODELLING

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    steelmaking plants, gas or coal power plants, chemical plants or natural gas production plants. Facing are by definition localized at the plants, like e.g. steelmaking plants, gas or coal power plants, chemical plants be in the order of several cubic meters of CO2 per second. In power plants, the concentration of CO2 is generally

  13. COLLOQUE DE PHYSIQUE Colloque C2, supplment au n2, Tome 51, Fvrier 1990 C2-587

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    are related to the periodicity of the ceramic bars into the matrix. To avoid the influence of the lateral Français d'Acoustique 1990 BROAD-BAND CERAMIC-POLYMER PIEZOELECTRIC COMPOSITES M. SOL SANCHEZ, F.R. MONTERO to enlarge the frequency of (1-3) ceramic polymer piezoelectric composites. In this paper a new concept of (1

  14. Catalytic oxidative coupling of methane over Li/MgO using N2O as an oxidant

    E-Print Network [OSTI]

    Yamamoto, Hiroshi

    1992-01-01T23:59:59.000Z

    for methanol synthesis at 240 to 260 C and 5 to 10 MPa pressure. In the second step, HZSM ? 5 zeolite is used as a catalyst, to synthesize gasoline from methanol at. about 360 to 415 C and 2. 0 MPa pressure. The latter part, of this technology was developed... is converted to synthesis gas by steam reforming and the methanol synthesis uses conventional technology. The advent of this technology (MTG process), which synthesizes high octane gasoline from methanol, may be contrasted with the Fischer ? Tropsch process...

  15. Spectroscopic and Electronic Structure Studies of the 4-Sulfide Bridged Tetranuclear CuZ Cluster in N2O

    E-Print Network [OSTI]

    Chen, Peng

    Tecnologia, UniVersidade NoVa de Lisboa, 2825-114 Caparica, Portugal Received April 8, 2002 Abstract

  16. Electronic Structure Description of the 4-Sulfide Bridged Tetranuclear CuZ Center in N2O Reductase

    E-Print Network [OSTI]

    Chen, Peng

    Versity, Stanford, California 94305, Departamento de Qui´mica, CQFB, Faculdade de Cie^ncias e Tecnologia, Uni

  17. Test plan for N2 HEPA filters assembly shop stock used on PFP E4 exhaust system

    SciTech Connect (OSTI)

    DICK, J.D.

    1999-09-01T23:59:59.000Z

    At Plutonium Finishing Plant (PFP) and Plutonium Reclamation Facility (PRF) Self-contained HEPA filters, encased in wooden frames and boxes, are installed in the E4 Exhaust Ventilation System to provide confinement of radioactive releases to the environment and confinement of radioactive contamination within designated zones inside the facility. Recently during the routine testing in-leakage was discovered downstream of the Self-contained HEPA filters boxes. This Test Plan describes the approach to conduct investigation of the root causes for the in-leakage of HEPA filters.

  18. Formation and Genotoxicity of Novel Oxidatively Generated Tandem DNA Lesions and N2-(1-carboxyethyl)-2'-deoxyguanosine

    E-Print Network [OSTI]

    Jiang, Yong

    2009-01-01T23:59:59.000Z

    and E. coli strains; Prof. Myron F. Goodman for offering theprovided by Prof. Myron F. Goodman (29). Human polymerase ?

  19. Current biofuel feedstock crops such as corn lead to large environmental losses of N through nitrate leaching and N2

    E-Print Network [OSTI]

    DeLucia, Evan H.

    219 Current biofuel feedstock crops such as corn lead to large environmental losses of N through biofuel crops established on a rich Mollisol soil. Reduced Nitrogen Losses after Conversion of Row Crop Agriculture to Perennial Biofuel Crops Candice M. Smith, Mark B. david,* Corey A. Mitchell, Michael d. Masters

  20. Benzene-derived N2-(4-hydroxyphenyl)-deoxyguanosine adduct: UvrABC incision and its conformation in DNA

    E-Print Network [OSTI]

    Hang, Bo

    2010-01-01T23:59:59.000Z

    in a historical UK cohort of benzene exposed workers. OccupEnvironmental exposure to benzene: an update. Environ Health2004. Genotoxicity of benzene and its metabolites. Mutat Res

  1. USE OF NITROGEN BUDGETS AND N2 FLUX MEASUREMENTS TO ESTIMATE THE ROLE OF DENITRIFICATION IN BROWNFIELD STORMWATER WETLANDS

    E-Print Network [OSTI]

    Hall, Sharon J.

    IN BROWNFIELD STORMWATER WETLANDS Monica M. Palta 1, Peter Groffman2, Stuart Findlay2 1 School of Life Sciences in inorganic nitrogen cycling and removal in urban brownfield wetlands INTRODUCTION · Urban areas are net BROWNFIELD SITES SUPPORTING SEMI-PERMANENTLY FLOODED WETLANDS. White outlines delineate low-lying semi

  2. Benzene-derived N2-(4-hydroxyphenyl)-deoxyguanosine adduct: UvrABC incision and its conformation in DNA

    E-Print Network [OSTI]

    Hang, Bo

    2010-01-01T23:59:59.000Z

    P-postlabeling. Carcinogenesis Malta, E. , Moolenaar, G.F. ,J Biol Chem 281, 2184-2194. Malta, E. , Verhagen, C.P. ,interactions with damaged DNA (Malta et al. , 2006; Malta et

  3. Boltzmann Equation Analysis and Monte Carlo Simulation of Electron Transport in N2-O2 streamer discharge

    E-Print Network [OSTI]

    Ebert, Ute

    , Belgrade, Serbia. 3 ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences energy, drift velocity, diffusion coefficients and rate coefficients are reported. 1. Introduction, in a recently developed three-dimensional hybrid model of a streamer plasma discharge [7] the low-energy

  4. Selective Binding of O2 over N2 in a Redox-Active Metal-Organic Framework

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch > TheNuclearHomeland ScienceInnovationScienceMaterials Center atimpact

  5. updated_supplemental_lists_1n-2n-3m_07-06-2012.xlsx | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2, 2015Visiting8.pdfandn-2n-3m_07-06-2012.xlsx

  6. THERMOCATALYTIC CO2-FREE PRODUCTION OF HYDROGEN FROM HYDROCARBON FUELS

    E-Print Network [OSTI]

    for the process efficiency. However these impurities may result in contamination of hydrogen by CO, CO2 and H2S which should be removed from the product gas using methanation and H2S scrubbing steps, respectively. 11

  7. Regulation of October 6, 2009

    E-Print Network [OSTI]

    #12;Castro Cove · PAHs Stege Marsh · Copper, Zinc, Dacthal Mission Creek · Ammonia,H2S, PAHs · Lead Toxicity San Leandro Bay · Lead, Zinc, PAHs Central Basin · PAHs Islais Creek · Ammonia,H2S, PAHs

  8. Femtosecond-laser Microstructuring of Silicon: Dopants and Defects

    E-Print Network [OSTI]

    Mazur, Eric

    in the presence of H2S, SiH4, and H2. The absorptance for samples prepared in H2S is identical to that of samples

  9. ENERGY & ENVIRONMENT DIVISION. ANNUAL REPORT FY 1980

    E-Print Network [OSTI]

    Authors, Various

    2010-01-01T23:59:59.000Z

    used to follow removals of NH3, CO2, and H2S from samples ofremoval, interpretation of rates of stripping NH3, CO2, and H2S

  10. North American Journal of Fisheries Management 21:971975, 2001 Copyright by the American Fisheries Society 2001

    E-Print Network [OSTI]

    sulfide (H2S) and affect distributions of fish. We assessed the effects of H2S, relative to discharge river in northwestern Wyo- ming. Concentrations of H2S as low as 0.13 mg/L pre- vented upstream passage and habitation by trout over a 4.2-km reach of the river. The location of the down- stream terminus of the H2S

  11. The author(s) is solely responsible for the content of this technical presentation. The technical presentation does not necessarily reflect the official position of ASAE, and its printing and distribution does not constitute an endorsement of views

    E-Print Network [OSTI]

    Ni, Jiqin "Jee-Chin"

    /CSAE-SCGR Toronto, Ontario Canada July 18-22, 1999 Summary: The emission of hydrogen sulfide (H2S) was continuously data subsets were obtained. Average building H2S emission rate was 591 g/d (740 mg/d·m2 ). Average H2S each of the buildings had at least 700 pigs. The H2S emissions per AU reported in the 1970s were less

  12. LETTER Colonisation of toxic environments drives predictable life-history evolution in livebearing fishes (Poeciliidae)

    E-Print Network [OSTI]

    Schlupp, Ingo

    by the presence of toxic hydrogen sulphide (H2S). H2S is a widespread natural toxicant at deep-sea hydrothermal sources such as pulp mills or tanner- ies (Bagarinao 1992; Grieshaber & Volkel 1998). H2S is acutely toxic continuously high concentrations of H2S (e.g. Tobler et al. 2008b, 2011; Riesch et al. 2010a; Plath et al. 2013

  13. Influences of Water Vapor on Cr(VI) Reduction by Gaseous Hydrogen

    E-Print Network [OSTI]

    Deng, Baolin

    Columbia, Columbia, Missouri 65211 In Situ Gaseous Reduction (ISGR) using hydrogen sulfide (H2S) is a technology the contaminants, H2S, and various soil components. In this study, Cr(VI) reduction by gaseous H2S was examined under various relative humidities (0-96.7%), concentrations of Cr(VI) (127-475 µg/g of solid), and H2S

  14. Published: December 06, 2011 r 2011 American Chemical Society 2411 dx.doi.org/10.1021/jp205573v |J. Phys. Chem. C 2012, 116, 24112424

    E-Print Network [OSTI]

    Yildiz, Bilge

    . Phys. Chem. C 2012, 116, 2411­2424 ARTICLE pubs.acs.org/JPCC First-Principles Assessment of H2S and H2O-containing species, such as H2, H2O, and H2S, on the surface of a metal.9�11 The dissociated protons or hydrogen production and exploration fields since H2S and H2O are present in the drilling fluids, and H2S

  15. High-Resolution Soft X-Ray Photoionization Studies of Selected Molecules

    E-Print Network [OSTI]

    Hudson, E.A.

    2009-01-01T23:59:59.000Z

    and H2S [19]. This process would explain effect (3), with the dissociation presumably involving removal

  16. www.sciencemag.org SCIENCE VOL 325 28 AUGUST 2009 1079 PERSPECTIVES

    E-Print Network [OSTI]

    Connolly Jr, Harold C.

    ), euxinia (anoxic water infused with H2 S) (5), or something else. There is even less agree- ment on what

  17. Male mating behavior and costs of sexual harassment for females in cavernicolous and extremophile

    E-Print Network [OSTI]

    Schlupp, Ingo

    by physicochemical stressors, such as toxic hydrogen sulfide (H2S), or the fish occur in lightless subterranean (cave) habitats. Using five different populations from surface habitats with or without H2S, and from a sulfidic with at least one physicochemical stressor present (H2S or absence of light), a reduction in male sexual

  18. , Click the article number to go to ``Publication List". Click the record of the article to see the full text.

    E-Print Network [OSTI]

    Wang, Yayu

    [MWY-1103] B () (ymo@mail.tsinghua.edu.cn) (tel: 010-62788938-269) 1XUV H2S15.506, 15.366, 15.245 e to ``Publication List". Click the record of the article to see the full text. H2S H2S+ 22 A' 6A' 6A' SH

  19. Sulfurization of carbon surface for vapor phase mercury removal I: Effect of temperature and sulfurization protocol

    E-Print Network [OSTI]

    Borguet, Eric

    with the decomposition of surface functionalities, which creates active sites for sulfur bonding. The presence of H2S2S adsorption, and that surface chemistry played a significant role in the uptake of H2S. Mikhalovsky and Zaitsev [9] showed that H2S adsorption from an inert atmosphere on activated carbons resulted

  20. ORIGINAL PAPER Survival in an extreme habitat: the roles of behaviour

    E-Print Network [OSTI]

    Schlupp, Ingo

    ) inhabiting a limestone cave in Mexico. Several springs inside the cave are rich in toxic H2S. We demonstrate was low even at comparatively low H2S concentrations. Further- more, we show that food limitation affects the survival of P. mexicana pointing to energetically costly physiological adaptations to detoxify H2S

  1. Einige Probleme, die sich auf greren Raumskalen

    E-Print Network [OSTI]

    Zettler, Michael

    . H2S Zeitliche Entwicklung des Muschelbewuchses an einem Stahlkonstrukt Alter Muschelbewuchs fällt Bodenstömung transportierte H2S wird die Fauna vergiftet und bildet mi ihrer großen Biomasse wiederum ein vermehrtes Potential für neue Bildung von H2S : Dominoeffekt ! #12;Andre Iffländer, Wind-Projekt (Börgerende

  2. Low temperature S0 biomineralization at a supraglacial spring

    E-Print Network [OSTI]

    surface ice at Borup Fiord pass on Ellesmere Island, Canada, when high concentrations of aqueous H2S; Chela- Flores, 2006). H2S and elemental sulfur (S0 ) may have provided important energy sources the great oxidation event more than two billion years ago. H2S accumulation and persistence in euxinic deep

  3. ORIGINAL PAPER Michael Tobler Ingo Schlupp Katja U. Heubel

    E-Print Network [OSTI]

    Schlupp, Ingo

    ) that is rich in highly toxic H2S. We compared the water chemistry and fish communities of the cave and several nearby surface streams. Our study revealed high con- centrations of H2S in the cave and its outflow (El Azu- fre). The concentrations of H2S reach more than 300 lM inside the cave, which are acutely toxic

  4. Multi-State Poultry Meeting May 25 27, 2004

    E-Print Network [OSTI]

    Kentucky, University of

    -to-Know Act) regulations. CERCLA covers NH3 and hydrogen sulphide (H2S) emissions that will be of interest less than 10 microns in diameter), NOx (various nitrogen-oxygen compounds), and H2S. With the emerging emission. Malodor, when present, is typically a neighbor or township nuisance whereas the NH3, H2S

  5. Copyright (c) 2000 Water Environment Federation. All Rights Reserved. Odors and VOC Emissions 2000

    E-Print Network [OSTI]

    Ni, Jiqin "Jee-Chin"

    . This paper documents burst releases of H2S recorded with a state-of-the-art field measurement system in two fan operation times and differential static pressures. Concentrations of H2S in the sampled air streams were measured with an H2S converter and an SO2 analyzer for each building. Sample air

  6. Cubic-Plus-Association Equation of State for Water-Containing Mixtures: Is ``Cross

    E-Print Network [OSTI]

    Firoozabadi, Abbas

    hydrocarbons, CO2, and H2S. We attribute the deficiency to the neglect of the ``cross association'' between methane, ethane, unsatu- rated hydrocarbons, CO2 and H2S as ``pseudo-associating'' components and describ, reliable predictions are achieved for H2O/C1/CO2/H2S quater- nary mixture in two and three phases. VVC 2009

  7. Sulfur doping of diamond films: Spectroscopic, electronic, and gas-phase studies

    E-Print Network [OSTI]

    Bristol, University of

    with various levels of H2S addition 100­5000 ppm , using both microwave MW plasma enhanced CVD and hot filament is virtually unaffected by gas phase H2S concentration, and the films remain highly resistive. In contrast of S incorporation is directly proportional to the H2S concentration in the gas phase. Secondary electron microscopy

  8. Sulfur addition to microwave activated CH4/CO2 gas mixtures used for diamond CVD: growth studies and gas phase investigations

    E-Print Network [OSTI]

    Bristol, University of

    with H2S additions of 0­5000 ppm to a 51% CH4/49% CO2 plasma, with growth carried out for two different to deteriorate with increased H2S addition, as investigated by scanning electron microscopy (SEM) and laser Raman spectroscopy (LRS). H2S addition also appears to alter the resistivity of films, as measured by the four

  9. Hindawi Publishing Corporation International Journal of Evolutionary Biology

    E-Print Network [OSTI]

    Schlupp, Ingo

    adapted to extreme environmental conditions [i.e., darkness in caves and/or toxic hydrogen sulphide (H2S predictor for the evolutionary reduction of aggressiveness, especially when combined with presence of H2S indicating evolved mechanisms to better cope with H2S. 1. Introduction 1.1. Ecological Speciation. Divergent

  10. HYDROGEN SULFIDE KINETICS ON PEM FUEL CELL ELECTRODES V. A. Sethuramana

    E-Print Network [OSTI]

    Sethuraman, Vijay A.

    for the poisoning kinetics of hydrogen sulfide (H2S) on composite solid polymer electrolyte Pt (SPE-Pt) electrode and theoretically by a model, which predicts the oxidation current as a function of the applied potential. H2S) fuel cells, there is much less in the literature on H2S poisoning. Uribe et al showed

  11. Sperm production in an extremophile fish, the cave molly (Poecilia mexicana, Poeciliidae, Teleostei)

    E-Print Network [OSTI]

    Schlupp, Ingo

    sulfide (H2S) is acutely toxic and therefore unambiguously an extreme environmental factor for all animal effects of H2S for long periods and thus perma- nently inhabit sulfidic habitats. A unique freshwater system that is rich in H2S was described in southern Mexico. This sulfidic system is located about 30 km

  12. MSU Extension Publication Archive Archive copy of publication, do not use for current recommendations. Up-to-date

    E-Print Network [OSTI]

    ( NH3 ) and hydrogen sulfide ( H2S ) gas production vary with length of storage time and manure temperature. Neither NH3 nor H2S gas is produced until 4 days of storage. To minimize gas pro- duction.) in this study had three times the H2S gas production rates of the low temperature trial (60° F.). Several pro

  13. Kinetic, infrared, and X-ray absorption studies of adsorption, desorption, and reactions of thiophene on H-ZSM5 and Co/H-ZSM5

    E-Print Network [OSTI]

    Iglesia, Enrique

    represent less than 1% of the S-atoms removed from thiophene as H2S during catalytic propane temperatures, benzene and H2S formed from pre-adsorbed thiophene. These results indicate that hydrogen and desorbs unreacted. The remaining adsorbed thiophene desorbs as H2S, aromatic hydrocarbons

  14. Vertical flow wetlands (VFW) are a relatively new tool for treating waters acidified by mining or acid

    E-Print Network [OSTI]

    Boyer, Elizabeth W.

    of the compost by bacteria removes oxygen from the system and promotes the formation of hydrogen sulfide (H2S be detected downstream of two VFWs designed with the open channel to remove H2S prior to stream discharge and high H2S concentrations; consequently, it is not suitable for fish and other aquatic life until

  15. Development and Application of Advanced Models for Steam Hydrogasification: Process Design and Economic Evaluation

    E-Print Network [OSTI]

    Lu, Xiaoming

    2012-01-01T23:59:59.000Z

    SULFUR H2S SAND MDEA ASH Coal CERT-3 Table E.17 CO 2 removalH2S SAND MDEA ASH SULFUR Coal CERT-2B Table E.11 CO 2 removalH2S SO2 SAND MDEA ASH C12-C24 Coal CERT-2 Table E.8 CO 2 removal

  16. J. PNYS IV FRANCE 7 ( 1997) Colloque C1, Supplementau Journal de Physique I11 de mars 1997

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    on high specificsurface area Sic, is very efficient for the H2S removal from hot exhaust gas. The specificSis essentialprior to subsequent utilization. The solid sorbentsused for high temperature H2S removal high temperature H2S removal. In addition,silicon carbide is a chemicallyinert material which cannot

  17. Calorimetric study of the heat effects induced by the fixation of hydrogen sulphide on the surface of modified activated carbon fibres

    E-Print Network [OSTI]

    Boyer, Edmond

    -Etienne, France, meljac@emse.fr ABSTRACT In order to improve their efficiency for the removal of H2S contained vapour, H2S is not simply physically adsorbed on the surface of the treated cloths but several reactions with a gas mixture of H2O and H2S. KEY-WORDS Calorimetry; activated carbon fibres; hydrogen sulphide

  18. The authors are solely responsible for the content of this technical presentation. The technical presentation does not necessarily reflect the official position of the American Society of Agricultural Engineers (ASAE), and its printing and distribution do

    E-Print Network [OSTI]

    Ni, Jiqin "Jee-Chin"

    (NH3), hydrogen sulfide (H2S), carbon dioxide (CO2), and sulfur dioxide (SO2) from swine manure in 138 release and influenced H2S release. A new model of "bubble release" is proposed to explain release behavior characteristics. Bubble release controlled releases of H2S, CO2, and SO2 when manure was disturbed

  19. PM10, Pb (1999/30/C) As, Ni, Cd, Hg, [BaP] (2004/107/C)

    E-Print Network [OSTI]

    Concentration,ng/ng PMF marine aerosolBiomass burning Oil combustion Road dust Marine aerosol #12; ­ `' 0 0.2 0.4 0.6 0.8 1 Oil combustion Road dust Motor vehicles Biomass burning Road dust 2 Marine

  20. Helical Quantum States in HgTe Quantum Dots with Inverted Band Structures Kai Chang and Wen-Kai Lou

    E-Print Network [OSTI]

    - tensive attention in the past decades due to their application in electronic devices [1,2], e.g., single in TI nanostructures, e.g., QDs, remains rela- tively unexplored. In this Letter, we consider, these states are optical dark states that can be used in quan- tum information storage. A perpendicular

  1. Fate of As, Se, and Hg in a Passive Integrated System for Treatment of Fossil Plant Wastewater

    SciTech Connect (OSTI)

    Terry Yost; Paul Pier; Gregory Brodie

    2007-12-31T23:59:59.000Z

    TVA is collaborating with EPRI and DOE to demonstrate a passive treatment system for removing SCR-derived ammonia and trace elements from a coal-fired power plant wastewater stream. The components of the integrated system consist of trickling filters for ammonia oxidation, reaction cells containing zero-valent iron (ZVI) for trace contaminant removal, a settling basin for storage of iron hydroxide floc, and anaerobic vertical-flow wetlands for biological denitrification. The passive integrated treatment system will treat up to 0.25 million gallons per day (gpd) of flue gas desulfurization (FGD) pond effluent, with a configuration requiring only gravity flow to obviate the need for pumps. The design of the system will enable a comparative evaluation of two parallel treatment trains, with and without the ZVI extraction trench and settling/oxidation basin components. One of the main objectives is to gain a better understanding of the chemical transformations that species of trace elements such as arsenic, selenium, and mercury undergo as they are treated in passive treatment system components with differing environmental conditions. This progress report details the design criteria for the passive integrated system for treating fossil power plant wastewater as well as performance results from the first several months of operation. Engineering work on the project has been completed, and construction took place during the summer of 2005. Monitoring of the passive treatment system was initiated in October 2005 and continued until May 18 2006. The results to date indicate that the treatment system is effective in reducing levels of nitrogen compounds and trace metals. Concentrations of both ammonia and trace metals were lower than expected in the influent FGD water, and additions to increase these concentrations will be done in the future to further test the removal efficiency of the treatment system. In May 2006, the wetland cells were drained of FGD water, refilled with less toxic ash pond water, and replanted due to low survival rates from the first planting the previous summer. The goals of the TVA-EPRI-DOE collaboration include building a better understanding of the chemical transformations that trace elements such as arsenic, selenium, and mercury undergo as they are treated in a passive treatment system, and to evaluate the performance of a large-scale replicated passive treatment system to provide additional design criteria and economic factors.

  2. 1024 1024 HgCdTe CMOS Camera for Infrared Imaging Magnetograph of Big Bear Solar Observatory

    E-Print Network [OSTI]

    . In order to minimize background radiation and read-out noise, the liquid nitrogen (LN2) cooling system are written in the Interactive Data Language (IDL) of Research Systems Inc.. From Oct. 7 to Oct. 30, 2003. Caoab, Y. Xua, C. Denkerab, H. Wangab aNew Jersey Institute of Technology, Center for Solar

  3. A 15T PULSED SOLENOID FOR A HIGHPOWER TARGET H.G Kirk # , BNL, Upton, NY 11973, USA

    E-Print Network [OSTI]

    McDonald, Kirk

    [MJ] R [mW­40] DT [K] Seconds 15.1 T, 70 K Pulse Coil Employing 315 Exide XL6000 Batteries in Series. The conductor is 13­mm square, solid, cold­worked OFHC copper. Three different keystone geometries were used

  4. A Hybrid Gas Cleaning Process for Production of Ultraclean Syngas

    SciTech Connect (OSTI)

    Merkel, T.C.; Turk, B.S.; Gupta, R.P.; Cicero, D.C.; Jain, S.C.

    2002-09-20T23:59:59.000Z

    The overall objective of this project is to develop technologies for cleaning/conditioning IGCC generated syngas to meet contaminant tolerance limits for fuel cell and chemical production applications. The specific goals are to develop processes for (1) removal of reduced sulfur species to sub-ppm levels using a hybrid process consisting of a polymer membrane and a regenerable ZnO-coated monolith or a mixed metal oxide sorbent; (2) removal of hydrogen chloride vapors to sub-ppm levels using an inexpensive, high-surface-area material; and (3) removal of NH3 with acidic adsorbents followed by conversion of this NH3 into nitrogen and water. Existing gasification technologies can effectively and efficiently convert a wide variety of carbonaceous feedstocks (coal, petcoke, resids, biomass, etc.) into syngas, which predominantly contains carbon monoxide and hydrogen. Unfortunately, the impurities present in these carbonaceous feedstocks are converted to gaseous contaminants such as H2S, COS, HCl, NH3, alkali macromolecules and heavy metal compounds (such as Hg) during the gasification process. Removal of these contaminants using conventional processes is thermally inefficient and capital intensive. This research and development effort is focused on investigation of modular processes for removal of sulfur, chlorine, nitrogen and mercury compounds from syngas at elevated temperature and pressures at significantly lower costs than conventional technologies.

  5. JOURNAL DE PHYSIQUE Colloque C 1, supplment au n 2-3, Tome 32, Fvrier-Mars 1971, page C 1 -503 NEUTRON DIFFRACTION, MOSSBAUER

    E-Print Network [OSTI]

    Boyer, Edmond

    NEUTRON DIFFRACTION, MOSSBAUER AND MAGNETIC INVESTIGATION OF RUTILE-TYPE TANTALATES MTa04 (M = Ti, V, Cr-type tantalates MTa04 (M = Ti, V, Cr, Fe) has been carried out. Magnetic, Mossbauer and neutron diffraction properties. Neu- tron diffraction, Mossbauer and magnetic investigation of the tantalates MTa04 (M = Ti, V

  6. Power calculations D.A. Freedman December 2007 What is the power of a randomized controlled experiment? We assume there are n1 + n2

    E-Print Network [OSTI]

    Sekhon, Jasjeet S.

    Power calculations D.A. Freedman December 2007 What is the power of a randomized controlled of the null against the alternative µ1 = µ2, and we compute power at µ1 = µ2 + k where k > 0 is chosen so is asymptotically distributed as N(k, 1), where k = k/f Suppose k > 2. If Z is N(0, 1), asymptotic power is then P

  7. JOURNAL DE PHYSIQUE Colloque C2, supplment au n2j Tome 45? fvrier 1984 p3-^ C2-473

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    proliferation induction. Article published online by EDP Sciences and available at http://dx.doi.org/10 (AAS) K+ and Ca++ contents were determined after dehydration of the samples in a drying oven (24 h

  8. JOURNAL DE PHYSIQUE Colloque CI, supplement au n2-3, Tome 33, Fevrier-Mars 1972, page Cl-97 LIGHT SCATTERING FROM SF6 IN THE VICINITY

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    SCATTERING FROM SF6 IN THE VICINITY OF THE CRITICAL POINT R. MOHR (*) and K. H. LANGLEY Department of Physics'attenuation et la dispersion de la Vitesse des hypersons dans SF6 le long de 1'isochore critique, en utilisant prelimi- nary measurements of the Rayleigh linewidth in SF6 along the critical isochore

  9. JOURNAL DE PHYSIQUE Colloque Cl ,supplt?mentau n " 2, Tome 40, fgvrier 1979,page C1-157 SPECTROSCOPY IN THE GRAZING-INCIDENCE SPECTRAL REGION

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -atom collisions at the 600-keV heavy-ion accelerator at Aarhus University. An ellipsoidal, gold-coated mirror ARRANGEMENT The experimental arrangement is shown schematically in Fig. 1 . A gold-coated, el- lipsoidal. This was accomplished by installing a shaft encoder (LOGIK, Denmark) on the drive shaft, connect- ing the gear box

  10. JOURNAL DE PHYSIQUE Colloque C2, supplment au n2, Tome k5, fvrier 198^ pageC2-465

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    in propane cooled by liquid nitrogen. Sections were cut in a cryostat (temperature of the chamber: -30 C. Cell zones of t h e growth p l a t e : M = mineralized, R= r e s t i n g , P= pro1 i f e r a t i n g

  11. Berry's Phases for Arbitrary Spins Non-Linearly Coupled to External Fields. Application to the Entanglement of N > 2 Non-Correlated One-Half Spins

    E-Print Network [OSTI]

    Marie-Anne Bouchiat; Claude Bouchiat

    2010-11-05T23:59:59.000Z

    We derive the general formula giving the Berry phase for an arbitrary spin, having both magnetic-dipole and electric-quadrupole couplings with external time-dependent fields. We assume that the effective E and B fields remain orthogonal during the quantum cycles. This mild restriction has many advantages. It provides simple symmetries leading to selection rules and the Hamiltonian-parameter and density-matrix spaces coincide for S=1. This implies the identity of the Berry and Aharonov-Anandan phases, which is lost for S>1. We have found that new features of Berry phases emerge for integer spins>2. We provide explicit numerical results of Berry phases for S=2,3,4. We give a precise analysis of the non-adiabatic corrections. The accuracy for satisfying adiabaticity is greatly improved if one chooses for the time derivatives of the parameters a time-dependence having a Blackman pulse shape. This has the effect of taming the non-adiabatic oscillation corrections which could be generated by a linear ramping. For realistic experimental conditions, the non-adibatic corrections can be kept reversal of the angular velocity can be cancelled exactly if the quadrupole to dipole coupling ratio takes a "magic" value. The even ones are cancelled by subtraction of the phases relative to opposite velocities. As a possible application of the results of this paper we suggest a route to holonomic entanglement of N non-correlated 1/2-spins by performing adiabatic cycles governed by a Hamiltonian which is a non-linear function of the total spin operator S defined as the sum of the N spin operators. The case N=4 and Sz=1 is treated explicitly and maximum entanglement is achieved.

  12. 1 x N^2 wavelength-selective switch with two cross-scanning one-axis analog micromirror arrays in a 4-f optical system

    E-Print Network [OSTI]

    Tsai, J C; Huang, STY; Hah, D; Wu, Ming C

    2006-01-01T23:59:59.000Z

    optical microelectromechanical systems (MEMS), optical ?berinclude optical microelectromechanical systems (MEMS),

  13. WRF-Chem model predictions of the regional impacts of N2O5 heterogeneous processes on night-time chemistry over north-western Europe

    E-Print Network [OSTI]

    Lowe, D.; Archer-Nicholls, S.; Morgan, W.; Allan, J.; Utembe, S.; Ouyang, B.; Aruffo, E.; Le Breton, M.; Zaveri, R. A.; Di Carlo, P.; Percival, C.; Coe, H.; Jones, R.; McFiggans, G.

    2015-02-09T23:59:59.000Z

    -containing compounds such as dimethylsulfide (DMS) (Winer et al., 1984; Platt and Le Bras, 1997), and the aerosol burden, through indirect pro- duction of aerosol nitrate (NO?3 ) (Heikes and Thompson, 1983; Li et al., 1993) and creation of less volatile oxidised or...

  14. N2s2 chelating agents as cys-x-cys biomimics for fe(no) and fe(no)2 complexes 

    E-Print Network [OSTI]

    Chiang, Chao-Yi

    2006-08-16T23:59:59.000Z

    model complexes I have examined the fundamental properties of a dithiolato-Fe(NO)2 complex, bismercaptoethandiazacyclooctane iron dinitrosyl or (H+bme-daco)Fe(NO)2 as a biomimic of dicysteinate coordination of [Fe(NO)2]. This complex was prepared...

  15. Role of Ion Damage on Unintentional Ca Incorporation During the Plasma-Assisted Molecular-Beam Epitaxy Growth of Dilute Nitrides Using N2/Ar Source Gas Mixtures

    SciTech Connect (OSTI)

    Oye, M. M.; Bank, S. R.; Ptak, A. J.; Reedy, R. C.; Goorsky, M. S.; Holmes Jr., A. L.

    2008-05-01T23:59:59.000Z

    Unintentional Ca incorporation caused by Ca-contaminated substrate surfaces on as-purchased GaAs wafers are known to limit the efficiency of solar cells based on dilute nitride materials. This article focuses on further understanding the conditions and mechanisms by which these Ca impurities incorporate. Plasma-assisted molecular-beam epitaxy utilizing a 1% N{sub 2} in Ar precursor gas mixture was used to grow GaAs at 400 and 580 C, and GaN{sub 0.01}As{sub 0.99} at 400 C. Two plasma operating combinations of rf power and gas flow rate were used to generate different amounts and energies of both ions and other plasma species, while keeping nitrogen incorporation constant. The ions were characterized with a dual-grid, retarding-field ion energy analyzer, and the corresponding ion energy distributions are presented to correlate ions with Ca incorporation. When appropriate, dc-biased deflector plates were used to remove ions during growth. Secondary ion mass spectrometry was used to measure Ca in GaAs and GaN{sub 0.01}As{sub 0.99}. Ca incorporation was observed in the dilute nitride samples, but the effects of ions did not exceed other Ca incorporation mechanisms associated with defects due to both low temperature growth and nitrogen incorporation; however, different neutral active nitrogen species (atomic N and metastable N{sub 2}) may be a factor. Ca incorporation measured in GaAs grown at 400 C with a pure Ar plasma is predominantly due to defects associated with low temperature growth, as opposed to plasma damage caused by the ions. GaAs growths at 580 C without a plasma did not exhibit Ca incorporation, but growth at 580 C with ions from a pure Ar plasma caused Ca incorporation.

  16. PHYSICAL REVIEW A 87, 013434 (2013) Role of resonance-enhanced multiphoton excitation in high-harmonic generation of N2

    E-Print Network [OSTI]

    Chu, Xi

    molecular dynamics with subfemtosecond temporal resolution [3­8]. The sensitivity of HHG emissionPHYSICAL REVIEW A 87, 013434 (2013) Role of resonance-enhanced multiphoton excitation in high and Biochemistry and Center for Biomolecular Structure and Dynamics, The University of Montana, Missoula, Montana

  17. Industry perspective chimica Oggi / cHEMISTRY TOdaY -vol 27 n 2 / March/April 2009 -Focus on Tides

    E-Print Network [OSTI]

    Rhode Island, University of

    , as a consequence, the metabolism in cells in diseased tissue becomes partially anaerobic, leading to the production of such metabolism in any tissue is the formation of H+, which must be removed from the cell to maintain the normal potential from the proton gradient across the dielectric membrane, the H+ ions accumulate near the surfaces

  18. 47Agrociencia. (2006) Vol. X N 2 pg. 47 -61 CAMBIOS EN EL USO DE LA TIERRA EN ARGENTINA Y URUGUAY

    E-Print Network [OSTI]

    Nacional de San Luis, Universidad

    47Agrociencia. (2006) Vol. X N° 2 pág. 47 - 61 CAMBIOS EN EL USO DE LA TIERRA EN ARGENTINA Y. Buenos Aires, Argentina. 2 Ecología Terrestre, Facultad de Ciencias ­ Universidad de la República. Montevideo. Uruguay. 3 Grupo de Estudios Ambientales ­ Universidad Nacional de San Luis. San Luis. Argentina

  19. Effect of N2 /Ar gas flow ratio on the deposition of TiN/Ti coatings on NiTi shape memory alloy by PIIID

    E-Print Network [OSTI]

    Zheng, Yufeng

    and deposition technique. The effect of nitrogen to argon gas flow ratio on the surface characteristics, chemical in standard uncoated titanium implants [7]. To date, NiTi alloy has found numerous clinical applica- tions. The nitrogen to argon ratio was changed in order to obtain the stoichiometric TiN coating. The surface

  20. "Quaderni di Ricerca in Didattica (Science)", n 2, 2011 G.R.I.M. (Department of Mathematics, University of Palermo, Italy)

    E-Print Network [OSTI]

    Spagnolo, Filippo

    ad argomenti complessi di meccanica statistica e termodinamica, con accurati modelli fisici aventi ideale svolge un ruolo di grande rilievo nell'ambito della termodinamica e della meccanica statistica

  1. BA 290N-2, ME290P-1, INFOSYS 290P-4 and DSID125 Managing the New Product Development Process: Design Theory and Methods

    E-Print Network [OSTI]

    Agogino, Alice M.

    Process: Design Theory and Methods Professors Alice M. Agogino, Sara Beckman and Leslie Speer Fall 2007-1058, (415) 464-0517, beckman@haas.berkeley.edu Leslie Speer, Industrial Design Program, San Jose State University, Art 231, (408) 924-4376, (510) 658- 3177, Leslie.Speer@sjsu.edu Teaching Assistants: Jonathan

  2. Laser diagnostics of pulverized coal combustion in O_2/N_2 and O_2/CO_2 conditions: velocity and scalar field measurements

    E-Print Network [OSTI]

    Balusamy, Saravanan; Kamal, M. Mustafa; Lowe, Steven M.; Tian, Bo; Gao, Yi; Hochgreb, Simone

    2015-05-13T23:59:59.000Z

    (Metz et al. 2005; IEA 2012). Increasing demand for power, especially in developing countries, will lead to a further increase in CO2 emissions and other harmful pollutants. To address the problem, several carbon capture and storage (CCS... ) technologies have been under develop- ment. One of the keys to CCS is the ability to increase CO2 concentrations in the stream gas to make it economical for sequestration. Oxyfuel combustion, where oxygen diluted with exhaust CO2 is used as an oxidizer...

  3. BANDO PER IL RECLUTAMENTO DI n. 2 RICERCATORI CON RAPPORTO DI LAVORO A TEMPO DETERMINATO FINANZIATO DA FONDI DI DIPARTIMENTO (art.2, lett. d del Regolamento)

    E-Print Network [OSTI]

    Guidoni, Leonardo

    indirizzo di posta elettronica segreteria.radiologia@uniroma1.it Nella domanda di partecipazione i candidati

  4. Vector Analyzing Power at Theta-Lab=18-Degrees for the H-2(p-],N)2p Reaction at 21.3 Mev 

    E-Print Network [OSTI]

    Nath, S.; Northcliffe, L. C.; Hiebert, John C.; Woolverton, H. L.; York, R. L.; Graves, R. G.; Craft, B. C.

    1984-01-01T23:59:59.000Z

    The total cross sections for K+ mesons on carbon and deuterium nuclei have been measured at eleven momenta in the range 450-740 MeV/c. The experimental technique was of the standard transmission type. The K+ meson is the ...

  5. Finite-size lattice method and the roughening transition Service de Physique Thorique, CEN Saclay, BP n 2, 91190 Gif sur Yvette, France

    E-Print Network [OSTI]

    Boyer, Edmond

    configurations are forbidden. This SOS model is related to the well-known X - Y and Coulomb-gas models [2-4]. Its the correlations have a power- law decay. The transition was proved by Kosterlitz to be of an infinite-order [5, 6 : Where Ål, Å2 are the largest (real positive) two eigen- values of the transfer matrix. Article published

  6. JOURNAL DE PHYSIQUE Colloque C 1, supplment au n 2-3, Tome 32, Fvrier-Mars 1971, page C 1 -508 EXCHANGE ENHANCED SUSCEPTIBILITY

    E-Print Network [OSTI]

    Boyer, Edmond

    model in which a repulsive Coulomb interaction of strength U is limited to the impurity site. We have atom and its neighbors a Curie law behavior for x can be obtained over the four decades of temperature is (1) where dia creates an electron with spin c/2 = ± ·£ at site i, U is the strength of the coulomb

  7. From source to sea: spatial and temporal fluxes of the greenhouse gases N2O, CO2 and CH4 in the river Tay catchment 

    E-Print Network [OSTI]

    Harley, James Fraser

    2013-07-01T23:59:59.000Z

    River networks act as a link between components of the terrestrial landscape, such as soils and groundwater, with the atmosphere and oceans, and are now believed to contribute significantly to global budgets of carbon ...

  8. The infrared spectrum of the N2H He ion-neutral complex S. A. Nizkorodov, J. P. Maier, and E. J. Bieske

    E-Print Network [OSTI]

    Nizkorodov, Sergey

    and mass spectrometry.5,6 The method most often used involves mass selecting the species before exciting scintillation detector, with the resulting current measured by a boxcar integrator. Tunable light in the 3 m

  9. Activation of N2O Reduction by the Fully Reduced 4-Sulfide Bridged Tetranuclear CuZ Cluster in Nitrous Oxide Reductase

    E-Print Network [OSTI]

    Chen, Peng

    , California 94305, and REQUIMTE, Departmento de Qui´mica, CQFB, Faculdade de Cie^ncias e Tecnologia, Uni

  10. Atomic-Scale Spin-Polarized Scanning Tunneling Microscopy Applied To Mn3N2(010) Haiqiang Yang and Arthur R. Smith

    E-Print Network [OSTI]

    source effusion cell for Mn and a rf plasma source for N [5,6]. All STM imaging is performed at 300 K-centered tetragonal (fct) rock-salt type struc- ture. The bulk magnetic moments of the Mn atoms are FM within (001

  11. Equilibrium and transport properties of CO2+N2O and CO2+NO mixtures. A molecular simulation and equation of state modelling study.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    viscosities were determined for CO2+NOx mixtures. Due to the strong similarities between carbon dioxide simulation; Equation of state. 1. Introduction In Carbon dioxide Capture and Storage (CCS) operations to a pure carbon dioxide. This may have impacts on the different stages of the CCS chain: capture

  12. verso impressa ISSN 0101-7438 / verso online ISSN 1678-5142 Pesquisa Operacional, v.24, n.2, p.323-337, Maio a Agosto de 2004 323

    E-Print Network [OSTI]

    Oliveira, Aurélio R. L.

    eficientes de- vido a aspectos econômicos e avanços computacionais. Isto incentiva o crescimento de modelos

  13. Luminescent Ru(phen)n(bps)3-n 2n-4 Complexes (n ) 0-3) as Probes of Electrostatic and

    E-Print Network [OSTI]

    Turro, Claudia

    of electrons and translo- cation of protons in biological energy storage and conversion systems Interactions with Micellar Media James W. Hackett, II, and Claudia Turro* Department of Chemistry, The Ohio in the relative energies of the emissive 3MLCT state and the 3* state of the bps ligands, such that more effective

  14. Appendix: A Chemistry Primer A pure substance is one with a definite chemical formula,. e.g., N2 or H2O. Atomic

    E-Print Network [OSTI]

    Yu, Gexin

    is its heat capacity. In fact, there are two standard versions of heat capacity, depending on how liquid or gas, its state is determined by its temperature, T, its pressure, p, and its volume, V as holding for many gases around 273o K (0o F) and 1 atmosphere. But equations of state for liquids in wide

  15. JOURNAL DE PHYSIQUE Colloque C1, supplkment au n" 2, Tome 40, fkvrier 1979, page C1-225 I.A. S e l l i n

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , Tennessee 37830, U.S.A., and Research I n s t i t u t e of Physics, S-104 05 Stockholm, Sweden Rlsum'e. Nous to 1.2 M~V/A.Extensive work with both s o l i d and gas targets and H, He p r o j e c t i l e s has a l with Union Carbide Corpo- r a t i o n and Associated Universities, Inc.; and by the Swedish Natural Science

  16. SYNTHESIS OF THE FULLY PROTECTED PHOSPHORAMIDITE OF THE BENZENE-DNA ADDUCT, N2- (4-HYDROXYPHENYL)-2'-DEOXYGUANOSINE AND INCORPORATION OF THE LATER INTO DNA OLIGOMERS

    E-Print Network [OSTI]

    Huang, Bo

    2008-01-01T23:59:59.000Z

    associated with low-level benzene exposure. EpidemiologyC. C. An overview of benzene metabolism. Environ. Healthstudies of human exposure to benzene in China and Europe An

  17. 188 Rev. Tecnol. Fortaleza, v. 30, n. 2, p. 188-197, dez. 2009. Paulo Csar Lodi, Jorge Gabriel Zornberg e Benedito de Souza Bueno

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    materials like geomembranes, geotextiles, geosynthetics clay liners and/ or a combination from all those. Liner. Geosynthetics. 1 Introdução A produção de resíduos sólidos urbanos tem aumentado aplicados a aterros sanitários Resumo Os liners são barreiras impermeáveis utilizadas em aterros sanitários

  18. N2s2 chelating agents as cys-x-cys biomimics for fe(no) and fe(no)2 complexes

    E-Print Network [OSTI]

    Chiang, Chao-Yi

    2006-08-16T23:59:59.000Z

    model complexes I have examined the fundamental properties of a dithiolato-Fe(NO)2 complex, bismercaptoethandiazacyclooctane iron dinitrosyl or (H+bme-daco)Fe(NO)2 as a biomimic of dicysteinate coordination of [Fe(NO)2]. This complex was prepared...

  19. Vector Analyzing Power at Theta-Lab=18-Degrees for the H-2(p-],N)2p Reaction at 21.3 Mev

    E-Print Network [OSTI]

    Nath, S.; Northcliffe, L. C.; Hiebert, John C.; Woolverton, H. L.; York, R. L.; Graves, R. G.; Craft, B. C.

    1984-01-01T23:59:59.000Z

    International Conference on Nucleon-Nucleon Interactions, AIP Conf. Proc. No. 41, edited by H. Fearing, D. Measday, and A. Strathdee (AIP, New York, 1977), p. 392. 5W. M. Kloet, in Polarization Phenomena in Nuclear Physics- I980 (Fifth International... Symposium, Sarrta Fe), Proceedings of the Fifth International Symposium on Polarization Phe- nomena in Nuclear Physics, AIP Conf. Proc. No. 69, edited by G. G. Ohlsen, R. E. Brown, N. Jarmie, M. W. 30 VECTOR ANALYZING PO%'ER AT 9),b ?18' FOR THE. . . 1389...

  20. Effects of EGR, water/N2/CO2 injection and oxygen enrichment on the availability destroyed due to combustion for a range of conditions and fuels

    E-Print Network [OSTI]

    Sivadas, Hari Shanker

    2009-06-02T23:59:59.000Z

    combustion of iso octane.................................................................................................... 24 3 Percentage availability destroyed for different ?Cooled? EGR fractions as a function of reactant temperature for constant... volume combustion of iso octane, reactant pressure of 500 kPa......................................................... 24 4 Product temperature for different ?Cooled? EGR fractions as a function of reactant temperature for constant pressure combustion...