Sample records for fluorine iodine phos

  1. Test of an LED Monitoring System for the PHOS Spectrometer

    E-Print Network [OSTI]

    Blick, A M; Erin, S V; Kharlov, Yu V; Lobanov, M O; Mikhailov, Yu V; Minaev, N G; Petrov, V A; Sadovsky, S A; Samoylenko, V D; Suzdalev, V I; Senko, V A; Tikhonov, V V

    1999-01-01T23:59:59.000Z

    Preprint submitted to Elsevier Print on 26th January 2000A prototype monitoring system for the Photon Spectrometer (PHOS) of the ALICE experiment at LHC is described in detail. The prototype consists of Control and Master modules. The first one is 8x8 matrix of Light Emitting Diodes coupled with stable generators of current pulses. The system provides an individual control for each of the 64 channels of PHOS prototype based on lead-tungstate crystals. A long term stability of order of 10-3 has been achieved in integral beam tests of the monitoring system and PHOS prototypes.

  2. Partially fluorinated ionic compounds

    DOE Patents [OSTI]

    Han, legal representative, Amy Qi (Hockessin, DE); Yang, Zhen-Yu (Hockessin, DE)

    2008-11-25T23:59:59.000Z

    Partially fluorinated ionic compounds are prepared. They are useful in the preparation of partially fluorinated dienes, in which the repeat units are cycloaliphatic.

  3. Fluorination process using catalyst

    DOE Patents [OSTI]

    Hochel, Robert C. (Aiken, SC); Saturday, Kathy A. (Aiken, SC)

    1985-01-01T23:59:59.000Z

    A process for converting an actinide compound selected from the group consisting of uranium oxides, plutonium oxides, uranium tetrafluorides, plutonium tetrafluorides and mixtures of said oxides and tetrafluorides, to the corresponding volatile actinide hexafluoride by fluorination with a stoichiometric excess of fluorine gas. The improvement involves conducting the fluorination of the plutonium compounds in the presence of a fluoride catalyst selected from the group consisting of CoF.sub.3, AgF.sub.2 and NiF.sub.2, whereby the fluorination is significantly enhanced. The improvement also involves conducting the fluorination of one of the uranium compounds in the presence of a fluoride catalyst selected from the group consisting of CoF.sub.3 and AgF.sub.2, whereby the fluorination is significantly enhanced.

  4. Fluorine separation and generation device

    DOE Patents [OSTI]

    The Regents of the University of California (Oakland, CA)

    2008-12-23T23:59:59.000Z

    A process and apparatus for the electrolytic separation of fluorine from a mixture of gases is disclosed. Also described is the process and apparatus for the generation of fluorine from fluorine/fluoride containing solids, liquids or gases.

  5. Fluorine separation and generation device

    DOE Patents [OSTI]

    Jacobson, Craig P. (Moraga, CA); Visco, Steven J. (Berkeley, CA); DeJonghe, Lutgard C. (Lafayette, CA); Stefan, Constantin I. (Hayward, CA)

    2010-03-02T23:59:59.000Z

    A process and apparatus for the electrolytic separation of fluorine from a mixture of gases is disclosed. Also described is the process and apparatus for the generation of fluorine from fluorine/fluoride containing solids, liquids or gases.

  6. Fluorinated elastomeric materials

    DOE Patents [OSTI]

    Lagow, Richard J. (6204 Shadow Mountain, Austin, TX 78731); Dumitru, Earl T. (10116 Aspen St., Austin, TX 78758)

    1986-11-04T23:59:59.000Z

    This invention relates to a method of making perfluorinated elastomeric materials, and to materials made by such methods. In the full synthetic scheme, a partially fluorinated polymeric compound, with moieties to prevent crystallization, is created. It is then crosslinked to a desired degree, then perfluorinated. Various intermediate materials, such as partially fluorinated crosslinked polymers, have useful properties, and are or may become commercially available. One embodiment of this invention therefore relates to perfluorination of a selected partially fluorinated, crosslinked material, which is one step of the full synthetic scheme.

  7. Fluorinated elastomeric materials

    DOE Patents [OSTI]

    Lagow, Richard J. (6204 Shadow Mountain, Austin, TX 78731); Dumitru, Earl T. (10116 Aspen St., Austin, TX 78758)

    1990-02-13T23:59:59.000Z

    This invention relates to a method of making perfluorinated elastomeric materials, and to materials made by such methods. In the full synthetic scheme, a partially fluorinated polymeric compound, with moieties to prevent crystallization, is created. It is then crosslinked to a desired degree, then perfluorinated. Various intermediate materials, such as partially fluorinated crosslinked polymers, have useful properties, and are or may become commercially available. One embodiment of this invention therefore relates to perfluorination of a selected partially fluorinated, crosslinked material, which is one step of the full synthetic scheme.

  8. Heavily fluorinated electronic polymers

    E-Print Network [OSTI]

    Lim, Jeewoo

    2011-01-01T23:59:59.000Z

    Building blocks, containing majority fluorine content by weight, for PPEs and PPVs have been synthesized. Some of the monomers were shown to give exclusively fluorous-phase soluble polymers, the syntheses of which were ...

  9. Tunable Electrochemical Properties of Fluorinated Graphene. ...

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

    Tunable Electrochemical Properties of Fluorinated Graphene. Tunable Electrochemical Properties of Fluorinated Graphene. Abstract: The structural and electrochemical properties of...

  10. Fluorinated silica microchannel surfaces

    DOE Patents [OSTI]

    Kirby, Brian J.; Shepodd, Timothy Jon

    2005-03-15T23:59:59.000Z

    A method for surface modification of microchannels and capillaries. The method produces a chemically inert surface having a lowered surface free energy and improved frictional properties by attaching a fluorinated alkane group to the surface. The coating is produced by hydrolysis of a silane agent that is functionalized with either alkoxy or chloro ligands and an uncharged C.sub.3 -C.sub.10 fluorinated alkane chain. It has been found that the extent of surface coverage can be controlled by controlling the contact time from a minimum of about 2 minutes to a maximum of 120 minutes for complete surface coverage.

  11. Detection of transient fluorine atoms

    SciTech Connect (OSTI)

    Loge, G.W.; Nereson, N.; Fry, H.A.

    1986-01-01T23:59:59.000Z

    A KrF eximer laser with a fluence of 50 mJ/cm/sup 2/ was used to photolyze either uranium hexafluoride or molecular fluorine, yielding a transient number density of fluorine atoms. The rise and decay of the atomic fluorine density was observed by transient absorption of a 25-..mu..m Pb-salt diode laser. To prevent the diode laser wavelength from drifting out of resonance with the atomic fluorine line, part of the beam was split off and sent through a microwave discharge fluorine atom cell. This allowed a wavelength modulation-feedback technique to be used to lock the diode laser wavelength onto the atomic line. The remaining diode laser beam was made collinear with the eximer laser beam using a LiF window with a 45/sup 0/ angle of incidence to reflect the infrared beam while transmitting most of the uv beam. Using this setup along with a transient digitizer to average between 100 and 200 transient absorption profiles, fluorine atom number densities on the order of 10/sup 14/ cm/sup -3/ in a 1.7 m pathlength were detected. The signals observed were about a factor of two less than expected from known photolysis and atomic fluorine absorption cross-sections. 2 refs., 4 figs.

  12. Inexpensive, Nonfluorinated (or Partially Fluorinated) Anions...

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

    & Publications Inexpensive, Nonfluorinated (or Partially Fluorinated) Anions for Lithium Salts and Ionic Liquids for Lithium Battery Electrolytes Inexpensive, Nonfluorinated...

  13. Iodine in Texas Soils.

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach); Fudge, J. F. (Joseph Franklin)

    1939-01-01T23:59:59.000Z

    , while the quantity of iodine in spinach bore a close relation to the quantity of iodine in the soil. The action. of the added iodine differed with the kind of soil. Hercus and Roberts (12) state that loam has a marked retentive power for soluble... in surface soils by soil types High 1 0 1 p. *. rn. Low p. p. m. .- 1.1 ........ 1.6 2.5 0.8 1.5 ........ ........ 1.1 ........ 2.0 East Texas Timber Country Upland soils with friable subsoils: Bowie fine sandy loam...

  14. Method of preparing pure fluorine gas

    DOE Patents [OSTI]

    Asprey, Larned B. (Los Alamos, NM)

    1976-01-01T23:59:59.000Z

    A simple, inexpensive system for purifying and storing pure fluorine is described. The method utilizes alkali metal-nickel fluorides to absorb tank fluorine by forming nickel complex salts and leaving the gaseous impurities which are pumped away. The complex nickel fluoride is then heated to evolve back pure gaseous fluorine.

  15. Fluorination of the cyanogen halides

    E-Print Network [OSTI]

    Ward, Raymond Anthony

    1960-01-01T23:59:59.000Z

    A Thesis Sy Raymond Anthony Ward Approved as to styl and content byt ~ rmen o o e c ~ ea o spar men A~act Some cyanogen halldee were fluorinated under varloua condltlona, and th? producte analyaed to deterelne th? couree of reaction. F...

  16. Production of fluorine-18 for medical applications

    E-Print Network [OSTI]

    Sullivan, Patricia Papa

    1973-01-01T23:59:59.000Z

    PRODUCTION OF FLUORINE-18 FOR MEDICAL APPLICATIONS A Thesis by PATRICIA PAPA SULLIVAN Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1973... Production of Fluorine-18 for Medical Applications. (December 1973) Patricia Papa Sullivan, B. S. , Marquette University; Directed by: Dr. Ronald D. Macfarlane A method is described for the production of fluorine-18 for medical purposes using...

  17. Partially fluorinated cyclic ionic polymers and membranes

    DOE Patents [OSTI]

    Yang, Zhen-Yu

    2013-04-09T23:59:59.000Z

    Ionic polymers are made from selected partially fluorinated dienes, in which the repeat units are cycloaliphatic. The polymers are formed into membranes.

  18. Copolymers of fluorinated polydienes and sulfonated polystyrene

    SciTech Connect (OSTI)

    Mays, Jimmy W. (Knoxville, TN); Gido, Samuel P. (Hadley, MA); Huang, Tianzi (Knoxville, TN); Hong, Kunlun (Knoxville, TN)

    2009-11-17T23:59:59.000Z

    Copolymers of fluorinated polydienes and sulfonated polystyrene and their use in fuel cell membranes, batteries, breathable chemical-biological protective materials, and templates for sol-gel polymerization.

  19. Energetics of Defects on Graphene through Fluorination. | EMSL

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

    Defects on Graphene through Fluorination. Energetics of Defects on Graphene through Fluorination. Abstract: In the present study, we used FGS5 as the substrate and implemented...

  20. Passivation of fluorinated activated charcoal

    SciTech Connect (OSTI)

    Del Cul, G.D.; Trowbridge, L.D.; Simmons, D.W.; Williams, D.F.; Toth, L.M.

    1997-10-01T23:59:59.000Z

    The Molten Salt Reactor Experiment (MSRE), at the Oak Ridge National Laboratory has been shut down since 1969 when the fuel salt was drained from the core into two Hastelloy N tanks at the reactor site. In 1995, a multiyear project was launched to remediate the potentially hazardous conditions generated by the movement of fissile material and reactive gases from the storage tanks into the piping system and an auxiliary charcoal bed (ACB). The top 12 in. of the ACB is known by gamma scan and thermal analysis to contain about 2.6 kg U-233. According to the laboratory tests, a few feet of fluorinated charcoal are believed to extend beyond the uranium front. The remainder of the ACB should consist of unreacted charcoal. Fluorinated charcoal, when subjected to rapid heating, can decompose generating gaseous products. Under confined conditions, the sudden exothermic decomposition can produce high temperatures and pressures of near-explosive characteristics. Since it will be necessary to drill and tap the ACB to allow installation of piping and instrumentation for remediation and recovery activities, it is necessary to chemically convert the reactive fluorinated charcoal into a more stable material. Ammonia can be administered to the ACB as a volatile denaturing agent that results in the conversion of the C{sub x}F to carbon and ammonium fluoride, NH{sub 4}F. The charcoal laden with NH{sub 4}F can then be heated without risking any sudden decomposition. The only consequence of heating the treated material will be the volatilization of NH{sub 4}F as a mixture of NH{sub 3} and HF, which would primarily recombine as NH{sub 4}F on surfaces below 200 C. The planned scheme for the ACB denaturing is to flow diluted ammonia gas in steps of increasing NH{sub 3} concentration, 2% to 50%, followed by the injection of pure ammonia. This report summarizes the planned passivation treatment scheme to stabilize the ACB and remove the potential hazards. It also includes basic information, results of laboratory tests, thermodynamic calculations, process description, and operational parameters, and addresses safety concerns.

  1. Tunable Electrochemical Properties of Fluorinated Graphene

    SciTech Connect (OSTI)

    Meduri, Praveen; Chen, Honghao; Xiao, Jie; Martinez, Jayson J.; Carlson, Thomas J.; Zhang, Jiguang; Deng, Zhiqun

    2013-06-18T23:59:59.000Z

    The structural and electrochemical properties of fluorinated graphene have been investigated by using a series of graphene fluorides (CFx, x=0.47, 0.66, 0.89). Fluorinated graphene exhibited high capacity retentions of 75-81% of theoretical capacity at moderate rates as cathode materials for primary lithium batteries. Specifically, CF0.47 maintained a capacity of 356 mAhg-1 at a 5C rate, superior to that of traditional fluorinated graphite. The discharged graphene fluorides also provide an electrochemical tool to probe the chemical bonding on the parent graphene substrate.

  2. Super-hydrophobic fluorine containing aerogels

    SciTech Connect (OSTI)

    Coronado, Paul R. (Livermore, CA); Poco, John F. (Livermore, CA); Hrubesh, Lawrence W. (Pleasanton, CA)

    2007-05-01T23:59:59.000Z

    An aerogel material with surfaces containing fluorine atoms which exhibits exceptional hydrophobicity, or the ability to repel liquid water. Hydrophobic aerogels are efficient absorbers of solvents from water. Solvents miscible with water are separated from it because the solvents are more volatile than water and they enter the porous aerogel as a vapor across the liquid water/solid interface. Solvents that are immisicble with water are separated from it by selectively wetting the aerogel. The hydrophobic property is achieved by formulating the aerogel using fluorine containing molecules either directly by addition in the sol-gel process, or by treating a standard dried aerogel using the vapor of fluorine containing molecules.

  3. Fluorination utilizing thermodynamically unstable fluorides and fluoride salts thereof

    DOE Patents [OSTI]

    Bartlett, Neil (Orinda, CA); Whalen, J. Marc (Corning, NY); Chacon, Lisa (Corning, NY)

    2000-12-12T23:59:59.000Z

    A method for fluorinating a carbon compound or cationic carbon compound utilizes a fluorination agent selected from thermodynamically unstable nickel fluorides and salts thereof in liquid anhydrous hydrogen fluoride. The desired carbon compound or cationic organic compound to undergo fluorination is selected and reacted with the fluorination agent by contacting the selected organic or cationic organic compound and the chosen fluorination agent in a reaction vessel for a desired reaction time period at room temperature or less.

  4. Magnetic Resonance Pulse Sequences for Fluorine-19 

    E-Print Network [OSTI]

    Terry, Robin

    2014-07-11T23:59:59.000Z

    : Fluorinated agents are more readily inert and will not be metabolized quickly so their movement progression can be monitored Additionally, ^(19)F has a limited background MR signal so resulting images will yield positively labeled cells, thus providing...

  5. Magnetic Resonance Pulse Sequences for Fluorine-19

    E-Print Network [OSTI]

    Terry, Robin

    2014-07-11T23:59:59.000Z

    . Magnetic resonance imaging (MRI) has the ability to noninvasively track the transplanted cells to ensure they are in the desired destination. Unlike other MRI contrast agents, fluorine-19 has the ability to provide unambiguous cell tracking for two reasons...

  6. Method for fluorination of uranium oxide

    DOE Patents [OSTI]

    Petit, George S. (Oak Ridge, TN)

    1987-01-01T23:59:59.000Z

    Highly pure uranium hexafluoride is made from uranium oxide and fluorine. The uranium oxide, which includes UO.sub.3, UO.sub.2, U.sub.3 O.sub.8 and mixtures thereof, is introduced together with a small amount of a fluorine-reactive substance, selected from alkali chlorides, silicon dioxide, silicic acid, ferric oxide, and bromine, into a constant volume reaction zone. Sufficient fluorine is charged into the zone at a temperature below approximately 0.degree. C. to provide an initial pressure of at least approximately 600 lbs/sq. in. at the ambient atmospheric temperature. The temperature is then allowed to rise in the reaction zone until reaction occurs.

  7. Fluorinated diamond bonded in fluorocarbon resin

    DOE Patents [OSTI]

    Taylor, Gene W. (Los Alamos, NM)

    1982-01-01T23:59:59.000Z

    By fluorinating diamond grit, the grit may be readily bonded into a fluorocarbon resin matrix. The matrix is formed by simple hot pressing techniques. Diamond grinding wheels may advantageously be manufactured using such a matrix. Teflon fluorocarbon resins are particularly well suited for using in forming the matrix.

  8. Fluorine compounds for doping conductive oxide thin films

    DOE Patents [OSTI]

    Gessert, Tim; Li, Xiaonan; Barnes, Teresa M; Torres, Jr., Robert; Wyse, Carrie L

    2013-04-23T23:59:59.000Z

    Methods of forming a conductive fluorine-doped metal oxide layer on a substrate by chemical vapor deposition are described. The methods may include heating the substrate in a processing chamber, and introducing a metal-containing precursor and a fluorine-containing precursor to the processing chamber. The methods may also include adding an oxygen-containing precursor to the processing chamber. The precursors are reacted to deposit the fluorine-doped metal oxide layer on the substrate. Methods may also include forming the conductive fluorine-doped metal oxide layer by plasma-assisted chemical vapor deposition. These methods may include providing the substrate in a processing chamber, and introducing a metal-containing precursor, and a fluorine-containing precursor to the processing chamber. A plasma may be formed that includes species from the metal-containing precursor and the fluorine-containing precursor. The species may react to deposit the fluorine-doped metal oxide layer on the substrate.

  9. PhosPhorus, Agriculture &

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    fertilizer, biosolids and manure, is over applied. However, the greatest concern today is with the land

  10. Fluorine in coal and coal by-products

    SciTech Connect (OSTI)

    Robertson, J.D.; Wong, A.S.; Hower, J.C. [Univ. of Kentucky, Lexington, KY (United States)

    1994-12-31T23:59:59.000Z

    Fluorine occurs in awe amounts in most coals. It is typically associated with minerals of the apatite group, principally fluorapatite and clays, and with fluorite, tourmaline, topaz, amphiboles and micas. The average fluorine content of US coal is, according to the tabulation of Swanson, 74 {mu}g/g. In the United States, the lowest average fluorine concentration of 30 {mu}g/g is found in coals from Eastern Kentucky and the highest average value of 160 {mu}g/g is found in coals from Wyoming and New Mexico. The concentration range of fluorine in European coals is similar to that found in the US while the average fluorine content of Australian coals ranges from 15 to 500 {mu}g/g. We have determined the fluorine content in coal and fly ash standards by proton-induced gamma ray emission analysis (PIGE).

  11. On the origin of fluorine in the Milky Way

    E-Print Network [OSTI]

    A. Renda; Y. Fenner; B. K. Gibson; A. I. Karakas; J. C. Lattanzio; S. Campbell; A. Chieffi; K. Cunha; V. V. Smith

    2004-10-25T23:59:59.000Z

    The main astrophysical factories of fluorine (19F) are thought to be Type II supernovae, Wolf-Rayet stars, and the asymptotic giant branch (AGB) of intermediate mass stars. We present a model for the chemical evolution of fluorine in the Milky Way using a semi-analytic multi-zone chemical evolution model. For the first time, we demonstrate quantitatively the impact of fluorine nucleosynthesis in Wolf-Rayet and AGB stars. The inclusion of these latter two fluorine production sites provides a possible solution to the long-standing discrepancy between model predictions and the fluorine abundances observed in Milky Way giants. Finally, fluorine is discussed as a possible probe of the role of supernovae and intermediate mass stars in the chemical evolution history of the globular cluster omega Centauri.

  12. Fluorine Gas Management Guidelines Fluorine is a highly toxic, pale yellow gas about 1.3 times as heavy as air at atmospheric

    E-Print Network [OSTI]

    de Lijser, Peter

    Fluorine Gas Management Guidelines Overview Fluorine is a highly toxic, pale yellow gas about 1.3 times as heavy as air at atmospheric temperature and pressure. Fluorine gas is the most powerful oxidizing agent known, reacting with practically all organic and inorganic substances. Fluorine gas

  13. Geochemical Cycling of Iodine Species in Soils

    SciTech Connect (OSTI)

    Hu, Q; Moran, J E; Blackwood, V

    2007-08-23T23:59:59.000Z

    Iodine is an important element in studies of environmental protection and human health, global-scale hydrologic processes and nuclear nonproliferation. Biogeochemical cycling of iodine in soils is complex, because iodine occurs in multiple oxidation states and as inorganic and organic species that may be hydrophilic, atmophilic, and biophilic. In this study, we applied new analytical techniques to study the content and speciation of stable iodine in representative surface soils, and sorption and transport behavior of iodine species (iodide, iodate, and 4-iodoaniline) in sediments collected at numerous nuclear facilities in the United States, where anthropogenic {sup 129}I from prior nuclear fuel processing activities poses an environmental risk. The surface soil samples were chosen for their geographic locations (e.g., near the ocean or nuclear facilities) and for their differing physico-chemical characteristics (organic matter, texture, etc). Extracted solutions were analyzed by IC and ICP-MS methods to determine iodine concentrations and to examine iodine speciation (iodide, iodate, and organic iodine). In natural soils, iodine is mostly (nearly 90% of total iodine) present as organic species, while inorganic iodine becomes important (up to 50%) only in sediments with low organic matter. Results from laboratory column studies, aimed at examining transport of different iodine species, showed much greater retardation of 4-iodoaniline than iodide or iodate. Careful attention must be given to potential interconversion among species when interpreting the biogeochemical behavior of iodine in the environment. In addition to speciation, input concentration and residence time effects will influence the biogeochemical cycling of anthropogenic 129I deposited on surface soils.

  14. MSIV leakage airborne iodine transport

    SciTech Connect (OSTI)

    Cline, J.E. (Cline Associates Inc., Rockville, MD (United States))

    1993-01-01T23:59:59.000Z

    Gaseous iodine deposits on surfaces exposed to vapors. Basic chemical and physical principles predict this behavior, and several laboratory and in-plant measurements demonstrate the characteristic. An empirical model was developed that describes the deposition, resuspension, and transformation of airborne radioiodine molecular species as a stream containing these forms moves along its pathway. The model uses a data base of measured values of deposition and resuspension rates in its application and describes the conversion of the more reactive inorganic iodine species I[sub 2] to the less reactive organic species CH[sub 3]I as the iodine deposits and resuspends along the path. It also considers radioactive decay and chemical surface bonding during residence on surfaces. For the 8-day [sup 131]I, decay during the airborne portion of the transport is negligible. Verification of the model included measurement tests of long gaseous-activity sampling lines of different diameters, operated at different flow rates and stream temperatures. The model was applied to the streams at a boiling water reactor nuclear power plant to describe the transport through leaking main steam isolation valves (MSIVs), following a loss-of-coolant accident.

  15. Method for producing fluorinated diamond-like carbon films

    DOE Patents [OSTI]

    Hakovirta, Marko J.; Nastasi, Michael A.; Lee, Deok-Hyung; He, Xiao-Ming

    2003-06-03T23:59:59.000Z

    Fluorinated, diamond-like carbon (F-DLC) films are produced by a pulsed, glow-discharge plasma immersion ion processing procedure. The pulsed, glow-discharge plasma was generated at a pressure of 1 Pa from an acetylene (C.sub.2 H.sub.2) and hexafluoroethane (C.sub.2 F.sub.6) gas mixture, and the fluorinated, diamond-like carbon films were deposited on silicon <100>substrates. The film hardness and wear resistance were found to be strongly dependent on the fluorine content incorporated into the coatings. The hardness of the F-DLC films was found to decrease considerably when the fluorine content in the coatings reached about 20%. The contact angle of water on the F-DLC coatings was found to increase with increasing film fluorine content and to saturate at a level characteristic of polytetrafluoroethylene.

  16. Iodine transport analysis in the ESBWR.

    SciTech Connect (OSTI)

    Kalinich, Donald A.; Gauntt, Randall O.; Young, Michael Francis; Longmire, Pamela

    2009-03-01T23:59:59.000Z

    A simplified ESBWR MELCOR model was developed to track the transport of iodine released from damaged reactor fuel in a hypothesized core damage accident. To account for the effects of iodine pool chemistry, radiolysis of air and cable insulation, and surface coatings (i.e., paint) the iodine pool model in MELCOR was activated. Modifications were made to MELCOR to add sodium pentaborate as a buffer in the iodine pool chemistry model. An issue of specific interest was whether iodine vapor removed from the drywell vapor space by the PCCS heat exchangers would be sequestered in water pools or if it would be rereleased as vapor back into the drywell. As iodine vapor is not included in the deposition models for diffusiophoresis or thermophoresis in current version of MELCOR, a parametric study was conducted to evaluate the impact of a range of iodine removal coefficients in the PCCS heat exchangers. The study found that higher removal coefficients resulted in a lower mass of iodine vapor in the drywell vapor space.

  17. Equilibria in aqueous iodine solutions

    E-Print Network [OSTI]

    Burger, Joanne Denise

    1970-01-01T23:59:59.000Z

    determined at several temperatures and the values of bH, AG, and aS have been calculated. 0 0 0 Ki x 10 was 0, 586 at 0, 5. 04 at 25, 18. 9 at $8 41. 2 at 50 , and 67. 6 at 56 , This equilibrium constant had never before been determined above 25... dependence of K . The enthalpy found in this work was 3. 65 kcal/mole, which agrees with the literature value of 3, 6 kcal/mole, The dissociation constant for iodine I2(aq) + was estimated as 3 HO=HOI +I x 10 . It was not possible to estab- "9 lish...

  18. Method for selectively removing fluorine and fluorine-containing contaminants from gaseous UF.sub.6

    DOE Patents [OSTI]

    Jones, Robert L. (Paducah, KY); Otey, Milton G. (Melber, KY); Perkins, Roy W. (Mayfield, KY)

    1982-01-01T23:59:59.000Z

    This invention is a method for effecting preferential removal and immobilization of certain gaseous contaminants from gaseous UF.sub.6. The contaminants include fluorine and fluorides which are more reactive with CaCO.sub.3 than is UF.sub.6. The method comprises contacting the contaminant-carrying UF.sub.6 with particulate CaCO.sub.3 at a temperature effecting reaction of the contaminant and the CaCO.sub.3.

  19. Dry process fluorination of uranium dioxide using ammonium bifluoride

    E-Print Network [OSTI]

    Yeamans, Charles Burnett, 1978-

    2003-01-01T23:59:59.000Z

    An experimental study was conducted to determine the practicality of various unit operations for fluorination of uranium dioxide. The objective was to prepare ammonium uranium fluoride double salts from uranium dioxide and ...

  20. Synthesis and material properties of supramolecules containing fluorinated organomercurials

    E-Print Network [OSTI]

    Taylor, Thomas Jackson

    2009-05-15T23:59:59.000Z

    This dissertation details the synthesis and analysis of novel supramolecular species that feature simple fluorinated organomercurials, such as trimeric perfluoroortho- phenylene mercury ([o-C6F4Hg]3). These organomercurials can complex a variety...

  1. Natural iodine in a clay formation: Implications for iodine fate in geological disposals

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    in the far-field of the storage. Surprisingly, most of the iodine was found not to be associated with organic significant implications for the fate of radio-iodine. In undisturbed far-field conditions, most natural.1016/j.gca.2009.09.030 #12;2 1. INTRODUCTION Underground nuclear waste disposal in clayey formations

  2. Mixed-layered bismuth-oxygen-iodine materials for capture and waste disposal of radioactive iodine

    DOE Patents [OSTI]

    Krumhansl, James L; Nenoff, Tina M

    2013-02-26T23:59:59.000Z

    Materials and methods of synthesizing mixed-layered bismuth oxy-iodine materials, which can be synthesized in the presence of aqueous radioactive iodine species found in caustic solutions (e.g. NaOH or KOH). This technology provides a one-step process for both iodine sequestration and storage from nuclear fuel cycles. It results in materials that will be durable for repository conditions much like those found in Waste Isolation Pilot Plant (WIPP) and estimated for Yucca Mountain (YMP). By controlled reactant concentrations, optimized compositions of these mixed-layered bismuth oxy-iodine inorganic materials are produced that have both a high iodine weight percentage and a low solubility in groundwater environments.

  3. Fluorine doping in dilute magnetic semiconductor Sn1–xFexO2...

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

    Fluorine doping in dilute magnetic semiconductor Sn1–xFexO2. Fluorine doping in dilute magnetic semiconductor Sn1–xFexO2. Abstract: Recent studies have reported...

  4. Iodine chemical forms in LWR severe accidents

    SciTech Connect (OSTI)

    Beahm, E.C.; Weber, C.F.; Kress, T.S.; Parker, G.W.

    1991-01-01T23:59:59.000Z

    Calculated data from seven severe accident sequences in light-water reactor plants were used to assess the chemical forms of iodine in containment. In most of the calculations for the seven sequences, iodine entering containment from the reactor coolant system was almost entirely in the form of CsI with very small contributions of I or HI. The largest fraction of iodine in forms other than CsI was a total of 3.2% as I plus HI. Within the containment, the CsI will deposit onto walls and other surfaces, as well as in water pools, largely in the form of iodide (I{sup {minus}}). The radiation induced conversion of I{sup {minus}} in water pools into I{sub 2} is strongly dependent on pH. In systems where the pH was controlled above 7, little additional elemental iodine would be produced in the containment atmosphere. When the pH falls below 7, it may be assumed that it is not being controlled, and large fractions of iodine as I{sub 2} within the containment atmosphere may be produced. 16 refs.

  5. Compilation of Requirements for Safe Handling of Fluorine and Fluorine-Containing Products of Uranium Hexafluoride Conversion

    SciTech Connect (OSTI)

    Ferrada, J.J.

    2000-04-03T23:59:59.000Z

    Public Law (PL) 105-204 requires the U.S. Department of Energy to develop a plan for inclusion in the fiscal year 2000 budget for conversion of the Department's stockpile of depleted uranium hexafluoride (DUF{sub 6}) to a more stable form over an extended period. The conversion process into a more stable form will produce fluorine compounds (e.g., elemental fluorine or hydrofluoric acid) that need to be handled safely. This document compiles the requirements necessary to handle these materials within health and safety standards, which may apply in order to ensure protection of the environment and the safety and health of workers and the public. Fluorine is a pale-yellow gas with a pungent, irritating odor. It is the most reactive nonmetal and will react vigorously with most oxidizable substances at room temperature, frequently with ignition. Fluorine is a severe irritant of the eyes, mucous membranes, skin, and lungs. In humans, the inhalation of high concentrations causes laryngeal spasm and broncospasms, followed by the delayed onset of pulmonary edema. At sublethal levels, severe local irritation and laryngeal spasm will preclude voluntary exposure to high concentrations, unless the individual is trapped or incapacitated. A blast of fluorine gas on the shaved skin of a rabbit causes a second degree burn. Lower concentrations cause severe burns of insidious onset, resulting in ulceration, similar to the effects produced by hydrogen fluoride. Hydrofluoric acid is a colorless, fuming liquid or gas with a pungent odor. It is soluble in water with release of heat. Ingestion of an estimated 1.5 grams produced sudden death without gross pathological damage. Repeated ingestion of small amounts resulted in moderately advanced hardening of the bones. Contact of skin with anhydrous liquid produces severe burns. Inhalation of AHA or aqueous hydrofluoric acid mist or vapors can cause severe respiratory tract irritation that may be fatal. Based on the extreme chemical properties of these chemicals as noted above, fluorine or fluorine compounds must be handled appropriately within the boundaries of many safety requirements for the protection of the environment and the public. This report analyzes the safety requirements that regulatory agencies have issued to handle fluorine or fluorine compounds and lists them in Table 1. Table 1 lists the source of the requirements, the specific section of the source document, and a brief description of the requirements.

  6. Thermal Stability of Fluorinated Polydienes Synthesized by Addition of Difluorocarbene

    SciTech Connect (OSTI)

    Huang, Tianzi [University of Tennessee, Knoxville (UTK); Wang, Xiaojun [ORNL; Malmgren, Thomas W [ORNL; Hong, Kunlun [ORNL; Mays, Jimmy [ORNL

    2012-01-01T23:59:59.000Z

    Linear PCHD and polyisoprenes with different microstructures and molecular weights are synthesized and chemically modified to improve their thermal and chemical stability by forming a three-membered ring structure containing two C-F bonds. Pyrolysis of these fluorinated polydienes proceeds through a two-stage decomposition involving chain scission, crosslinking, dehydrogenation, and dehalogenation. The pyrolysis leads to graphite-like residues, whereas their polydiene precursors decompose completely under the same conditions. The fluorination of PCHD enhances its thermal stability. The stronger C-F bond along with high strain of the three-membered ring structure and formation of relatively stable free radicals play an important role in the thermal stability of fluorinated polydienes.

  7. Redox Transformations and Transport of Cesium and Iodine

    E-Print Network [OSTI]

    isotopes of cesium (137 Cs) and iodine (131 I and 129 I) are environmental contaminants derived fromRedox Transformations and Transport of Cesium and Iodine (-1, 0, +5) in Oxidizing and Reducing, to study the redox chemistry (I) and transport (Cs, I) of cesium and iodine in a field setting. Injection

  8. The Behaviour ofIodine in the Terrestrial Environment.

    E-Print Network [OSTI]

    The Behaviour ofIodine in the Terrestrial Environment. An Investigation of the Possible Roskilde, Denmark Febtuary 1990 #12;1 Risø-M-2851 THE BEHAVIOUR OF IODINE IN THE TERRESTRIAL ENVIRONMENT influence the migration behaviour of iodine in the terrestrial environment. It is stated that the organic

  9. Fluorinated epoxides 6. Chemoselectivity in the preparation of

    E-Print Network [OSTI]

    Cirkva, Vladimir

    to allyl acetate) and fluorinated iodohydrin (CF3)2CFCH2CHICH2OH (2) (prepared from 1) were converted with allyl acetate [13­16] followed by epoxide formation. In contrast to the former report [9], we have found and iodohydrin 2 The dibenzoyl peroxide (DBP) induced addition of perfluoroisopropyl iodide to allyl acetate

  10. Fluorinated diamond particles bonded in a filled fluorocarbon resin matrix

    DOE Patents [OSTI]

    Taylor, G.W.; Roybal, H.E.

    1983-11-14T23:59:59.000Z

    A method of producing fluorinated diamond particles bonded in a filled fluorocarbon resin matrix. Simple hot pressing techniques permit the formation of such matrices from which diamond impregnated grinding tools and other articles of manufacture can be produced. Teflon fluorocarbon resins filled with Al/sub 2/O/sub 3/ yield grinding tools with substantially improved work-to-wear ratios over grinding wheels known in the art.

  11. Fluorinated diamond particles bonded in a filled fluorocarbon resin matrix

    DOE Patents [OSTI]

    Taylor, Gene W. (Los Alamos, NM); Roybal, Herman E. (Santa Fe, NM)

    1985-01-01T23:59:59.000Z

    A method of producing fluorinated diamond particles bonded in a filled fluorocarbon resin matrix. Simple hot pressing techniques permit the formation of such matrices from which diamond impregnated grinding tools and other articles of manufacture can be produced. Teflon fluorocarbon resins filled with Al.sub.2 O.sub.3 yield grinding tools with substantially improved work-to-wear ratios over grinding wheels known in the art.

  12. Characteristics of fluorinated nitroazoles as hypoxic cell radiosensitizers

    SciTech Connect (OSTI)

    Shibamoto, Y.; Nishimoto, S.; Shimokawa, K.; Hisanaga, Y.; Zhou, L.; Wang, J.; Sasai, K.; Takahashi, M.; Abe, M.; Kagiya, T.

    1989-04-01T23:59:59.000Z

    Types of 2-nitroimidazoles and 3-nitro-1,2,4-triazoles bearing one or two fluorine atoms on their side chains were synthesized to evaluate their physicochemical properties, radiosensitizing effects, and toxicity. The reduction potential of the compounds containing one fluorine was similar to that of misonidazole (MISO), whereas that of the difluorinated compounds was slightly higher. Both mono- and difluorinated compounds had an in vitro sensitizing activity comparable to or slightly higher than that of MISO. The fluorinated 3-nitrotriazoles were almost as efficient as the 2-nitroimidazoles with the same substituent. In vivo, some of the compounds were up to twice more efficient than MISO, whereas others were as efficient as MISO. Toxicity in terms of LD50/7 in mice was quite variable depending on the side-chain structure; the amide derivatives were less toxic than MISO, whereas the alcohol and ether derivatives were more toxic. In view of the radiosensitizing effect and toxicity in vivo, at least one compound, KU-2285 (a 2-nitroimidazole with an N1-substituent of: CH2CF2CONHCH2CH2OH) has been found to be as useful a hypoxic cell sensitizer as SR-2508.

  13. Fluorinated precursors of superconducting ceramics, and methods of making the same

    DOE Patents [OSTI]

    Wiesmann, Harold (Stony Brook, NY); Solovyov, Vyacheslav (Rocky Point, NY)

    2008-04-22T23:59:59.000Z

    This invention provides a method of making a fluorinated precursor of a superconducting ceramic. The method comprises providing a solution comprising a rare earth salt, an alkaline earth metal salt and a copper salt; spraying the solution onto a substrate to provide a film-covered substrate; and heating the film-covered substrate in an atmosphere containing fluorinated gas to provide the fluorinated precursor.

  14. Fluorinated precursors of superconducting ceramics, and methods of making the same

    DOE Patents [OSTI]

    Wiesmann, Harold (Stony Brook, NY); Solovyov, Vyacheslav (Rocky Point, NY)

    2012-07-10T23:59:59.000Z

    This invention provides a method of making a fluorinated precursor of a superconducting ceramic. The method comprises providing a solution comprising a rare earth salt, an alkaline earth metal salt and a copper salt; spraying the solution onto a substrate to provide a film-covered substrate; and heating the film-covered substrate in an atmosphere containing fluorinated gas to provide the fluorinated precursor.

  15. Fluorinated precursors of superconducting ceramics, and methods of making the same

    DOE Patents [OSTI]

    Wiesmann, Harold; Solovyov, Vyacheslav

    2014-02-18T23:59:59.000Z

    This invention provides a method of making a fluorinated precursor of a superconducting ceramic. The method comprises providing a solution comprising a rare earth salt, an alkaline earth metal salt and a copper salt; spraying the solution onto a substrate to provide a film-covered substrate; and heating the film-covered substrate in an atmosphere containing fluorinated gas to provide the fluorinated precursor.

  16. Method for gettering organic, inorganic and elemental iodine in aqueous solutions

    DOE Patents [OSTI]

    Beahm, Edward C. (Oak Ridge, TN); Shockley, William E. (Oak Ridge, TN)

    1990-01-01T23:59:59.000Z

    A process for the removal of iodine from aqueous solutions, particularly the trapping of radioactive iodine to mitigate damage resulting from accidents or spills associated with nuclear reactors, by exposing the solution to well dispersed silver carbonate which reacts with the iodine and iodides, thereby gettering iodine and iodine compounds from solution. The iodine is not only removed from solution but also from the contiguous vapor.

  17. Vehicle Technologies Office Merit Review 2015: Fluorinated Electrolyte for 5-V Li-Ion Chemistry

    Broader source: Energy.gov [DOE]

    Presentation given by Argonne National Laboratory at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about fluorinated...

  18. Vehicle Technologies Office Merit Review 2014: Fluorinated Electrolyte for 5-V Li-Ion Chemistry

    Broader source: Energy.gov [DOE]

    Presentation given by Argonne National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about fluorinated...

  19. Iodine Sorbent Performance in FY 2012 Deep Bed Tests

    SciTech Connect (OSTI)

    Nick Soelberg; Tony Watson

    2012-08-01T23:59:59.000Z

    Nuclear fission results in the production of fission products and activation products, some of which tend to be volatile during used fuel reprocessing and evolve in gaseous species into the reprocessing facility off-gas systems. Analyses have shown that I-129, due to its radioactivity, high potential mobility in the environment, and high longevity (half life of 15.7 million years), can require control efficiencies of up to 1,000x or higher to meet regulatory emission limits. Iodine capture is an important aspect of the Separations and Waste Forms Campaign Off-gas Sigma Team (Jubin 2011, Pantano 2011). Deep-bed iodine sorption tests for both silver-functionalized Aerogel and silver zeolite sorbents were performed during Fiscal Year 2012. These tests showed that: • Decontamination factors were achieved that exceed reasonably conservative estimates for DFs needed for used fuel reprocessing facilities in the U.S. to meet regulatory requirements for I-129 capture. • Silver utilizations approached or exceeded 100% for high inlet gas iodine concentrations, but test durations were not long enough to approach 100% silver utilization for lower iodine concentrations. • The depth of the mass transfer zone was determined for both low iodine concentrations (under 10 ppmv) and for higher iodine concentrations (between 10-50 ppmv); the depth increases over time as iodine is sorbed. • These sorbents capture iodine by chemisorption, where the sorbed iodine reacts with the silver to form very non-volatile AgI. Any sorbed iodine that is physisorbed but not chemically reacted with silver to form AgI might not be tightly held by the sorbent. The portion of sorbed iodine that tends to desorb because it is not chemisorbed (reacted to form AgI) is small, under 1%, for the AgZ tests, and even smaller, under 0.01%, for the silver-functionalized Aerogel.

  20. Determination of iodine to compliment mass spectrometric measurements

    SciTech Connect (OSTI)

    Hohorst, F.A.

    1994-11-01T23:59:59.000Z

    The dose of iodine-129 to facility personnel and the general public as a result of past, present, and future activities at DOE sites is of continuing interest, WINCO received about 160 samples annually in a variety of natural matrices, including snow, milk, thyroid tissue, and sagebrush, in which iodine-129 is determined in order to evaluate this dose, Currently, total iodine and the isotopic ratio of iodine-127 to iodine-129 are determined by mass spectrometry. These two measurements determine the concentration of iodine-129 in each sample, These measurements require at least 16 h of mass spectrometer operator time for each sample. A variety of methods are available which concentrate and determine small quantities of iodine. Although useful, these approaches would increase both time and cost. The objective of this effort was to determine total iodine by an alternative method in order to decrease the load on mass spectrometry by 25 to 50%. The preparation of each sample for mass spectrometric analysis involves a common step--collection of iodide on an ion exchange bed. This was the focal point of the effort since the results would be applicable to all samples.

  1. Detection of iodine monoxide in the tropical free troposphere

    E-Print Network [OSTI]

    19, 2012) Atmospheric iodine monoxide (IO) is a radical that catalytically destroys heat trapping in the remote tropical marine boundary layer (MBL) (2­4). IO further affects the oxidative capacity iodine species over the remote ocean remain poorly understood (11, 14) but are currently thought

  2. 337th Catalysis Research Center (CRC) Colloquium Fluorine Industry in China

    E-Print Network [OSTI]

    Ishii, Hitoshi

    337th Catalysis Research Center (CRC) Colloquium Fluorine Industry in China Lu Long (Shanghai industries in China, the second largest economy in the world. In this presentation, fluorine industry in China and the potential business opportunity will be discussed briefly, including inorganic fluorides

  3. Molecular Properties of the "Ideal" Inhaled Anesthetic: Studies of Fluorinated Methanes, Ethanes, Propanes,

    E-Print Network [OSTI]

    Hudlicky, Tomas

    , Propanes, and Butanes E. 1Eger, 11, MD*, J. Liu, MD*, D. D. Koblin, PhD, MDt, M. J. Laster, DVM*, S. Taheri unfluorinated, partially fluorinated, and perfluorinated methanes, ethanes, propanes, and butanes to define fluorinated methanes, ethanes, propanes, and butanes, also obtaining limited data on longer- chained alkanes

  4. Gain and continuous-wave laser power enhancement with a secondary discharge to predissociate molecular iodine

    E-Print Network [OSTI]

    Carroll, David L.

    with this chemical singlet oxygen generator motivated many investi- gations into an electrically driven oxygen molecular iodine in an electric oxygen-iodine laser G. F. Benavides,1 J. W. Zimmerman,2 B. S. Woodard,2 D. L the addition of a secondary discharge to predissociate the molecular iodine in an electric oxygen-iodine laser

  5. Iodine in groundwater of the North China Plain: Spatial patterns and hydrogeochemical processes of enrichment

    E-Print Network [OSTI]

    Zhan, Hongbin

    Iodine in groundwater of the North China Plain: Spatial patterns and hydrogeochemical processes online xxxx Keywords: Iodine Groundwater Spatial patterns Hydrogeochemistry North China Plain The North/L) and low-iodine (b10 g/L) groundwater regions that frequently result in iodine excess or deficien- cy

  6. Aging and iodine loading of silver-functionalized aerogels

    SciTech Connect (OSTI)

    Bruffey, S.H.; Jubin, R.T.; Anderson, K.K.; Walker, J.F. [Oak Ridge National Laboratory, P.O. Box 2008, MS-6223, Oak Ridge, TN 37831 (United States)

    2013-07-01T23:59:59.000Z

    Engineered silver-functionalized silica aerogels are being investigated for their potential application in off-gas treatment at a used nuclear fuel reprocessing facility. Reprocessing will release several key volatile radionuclides, including iodine-129. To achieve regulatory compliance, iodine-129 must be removed from any off-gas stream prior to environmental discharge. Ag{sup 0}-functionalized aerogels have been demonstrated to have high iodine-capture capacity, high porosity, and potential for conversion into a waste form. Capture materials used in off-gas treatment may be exposed to a heated, high-humidity, acidic gas stream for months. Extended exposure to this stream could affect sorbent performance. It was the aim of this study to evaluate what impacts might be observed when Ag{sup 0}-functionalized aerogels prepared at Pacific Northwest National Laboratory were contacted with a dry air stream for up to 6 months and then used to adsorb iodine from a synthetic off-gas stream. Results demonstrate that there is some loss of iodine-capture capacity caused by aging, but that this loss is not as marked as for aging of more traditional iodine sorbents, such as silver-impregnated mordenite. Specifically, aging silver-functionalized aerogel under a dry air stream for up to 6 months can decrease its iodine capacity from 41 wt% to 32 wt%. (authors)

  7. AGING AND IODINE LOADING OF SILVER-FUNCTIONALIZED AEROGELS

    SciTech Connect (OSTI)

    Bruffey, Stephanie H [ORNL; Jubin, Robert Thomas [ORNL; Anderson, Kaara K [ORNL; Walker Jr, Joseph Franklin [ORNL

    2013-01-01T23:59:59.000Z

    Engineered silver-functionalized silica aerogels are being investigated for their application in off-gas treatment at a used nuclear fuel reprocessing facility. Reprocessing will release several key volatile radionuclides, including iodine-129. To achieve regulatory compliance, iodine-129 must be removed from any off-gas stream prior to environmental discharge. Silver-functionalized aerogels have been demonstrated to have high iodine capture capacity, high porosity and potential for conversion into a waste form. Capture materials used in off-gas treatment may be exposed to a heated, high humidity, acidic gas stream for months. Extended exposure to this stream could affect sorbent performance. It was the aim of this study to evaluate what impacts might be observed when Ag0-functionalized aerogels prepared at Pacific Northwest National Laboratory were contacted with a dry air stream for up to 6 months and then used to adsorb iodine from a synthetic off-gas stream. Results demonstrate that there is some loss of iodine capture capacity caused by aging, but that this loss is not as marked as for aging of more traditional iodine sorbents, such as silver-impregnated mordenite. Specifically, aging silver-functionalized aerogel under a dry air stream for up to 6 months can decrease its iodine capacity from 41wt% to 32wt%.

  8. Elemental Fluorine-18 Gas: Enhanced Production and Availability

    SciTech Connect (OSTI)

    VanBrocklin, Henry F. [Department of Radiology and Biomedical Imaging

    2011-12-01T23:59:59.000Z

    The overall objective of this project was to develop an efficient, reproducible and reliable process for the preparation of fluorine-18 labeled fluorine gas ([¹?F]F?) from readily available cyclotron-produced [¹?F]fluoride ion. The two step process entailed the production of [¹?F]fluoromethane with subsequent conversion to [¹?F]F? by electric discharge of [¹?F]fluoromethane in the presence of carrier nonradioactive F? gas. The specific goals of this project were i) to optimize the preparation of [¹?F]fluoromethane from [¹?F]fluoride ion; ii) to develop a prototype automated system for the production of [¹?F]F? from [¹?F]fluoride ion and iii) develop a compact user friendly automated system for the preparation of [¹?F]F? with initial synthesis of fluorine-18 labeled radiotracers. Over the last decade there has been an increased interest in the production of "non-standard" positron-emitting isotopes for the preparation of new radiotracers for a variety of applications including medical imaging and therapy. The increased availability of these isotopes from small biomedical cyclotrons has prompted their use in labeling radiotracers. In much the same way the production of [¹?F]F? gas has been known for several decades. However, access to [¹?F]F? gas has been limited to those laboratories with the means (e.g. F? targetry for the cyclotron) and the project-based need to work with [¹?F]F? gas. Relatively few laboratories, compared to those that produce [¹?F]fluoride ion on a daily basis, possess the capability to produce and use [¹?F]F? gas. A simplified, reliable system employing [¹?F]fluoride ion from cyclotron targetry systems that are already in place coupled with on-demand production of the [¹?F]F? gas would greatly enhance its availability. This would improve the availability of [¹?F]F? gas and promote further work with a valuable precursor. The major goals of the project were accomplished over the funding period. The preparation of ¹?F]fluoromethane has been automated with reproducible yields greater than 90% conversion from [¹?F]fluoride ion. A trap and release system was established for the [¹?F]fluoride ion concentration and direct elution of the [¹?F]fluoride ion into the reaction vial with the appropriate base and precursor in DMSO. Other solvents were also investigated. The production time for [¹?F]fluoromethane is less than 10 minutes. An automated system for the [¹?F]F? gas production from the [18F]fluoromethane has been developed. The unit coupled to the [¹?F]fluoromethane system permits the on demand production of [¹?F]F? gas. In less than 30 minutes, mCi quantities of [¹?F]F? gas were produced. Several variables for the [¹?F]F? gas production were investigated and a set of parameters for reproducible operation were determined. These parameters included discharge chamber size, carrier gas (He, Ne, Ar), discharge time, discharge current, mass of F? gas added to the chamber. FDOPA and EF5 were used to test the reactivity of the [¹?F]F? gas. Both products were produced in low to modest yield. The ready availability of [¹?F]F? gas has potential impact to advance both DOE mission-driven initiatives and nuclear medicine initiatives through other federally funded agencies such as NIH and DoD. New reactions involving the use of [¹?F]F? gas will lead to direct labeling of new radiotracers and intermediates as well as new fluorine-18 labeled synthons that may be further reacted with other reagents to provide useful fluorine-18 labeled compounds. New tracers to understand and follow plant and microbial metabolism as well as new tracers for nuclear medicine applications, that have been either difficult to obtain or never produced due to the limited availability of [¹?F]F? gas, may be prepared using the techniques developed .

  9. Iodine-coordinated sulfide leads to an exceptionally stable ceramic...

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

    LPS and LiI. This new formulation takes advantage of the chemical stability of LiI to render an electrolyte with excellent compatability with Li anode. Additionally, the iodine...

  10. Chemistry and mass transport of iodine in containment

    SciTech Connect (OSTI)

    Beahm, E.C.; Weber, C.F.; Kress, T.S.; Shockley, W.E.; Daish, S.R.

    1988-01-01T23:59:59.000Z

    TRENDS is a computer code for modeling behavior of iodine in containment. It tracks both chemical and physical changes and features such as calculation of radiation dose rates in water pools , radiolysis effects, hydrolysis, and deposition/revaporization on aerosols and structural surfaces. Every attempt has been made to account for all significant processes. Reaction rate constants for iodine hydrolysis and radiolysis were obtained by a variable algorithm that gives values closely modeling experimental data. TRENDS output provides the distribution of iodine in containment and release from containment as a function of time during a severe accident sequence. Initial calculations with TRENDS have shown that the amount of volatile iodine released from containment is sensitive to the value of the liquid-gas (evaporation) mass transport coefficient for I/sub 2/. 7 refs., 4 figs., 3 tabs.

  11. Method of forming fluorine-bearing diamond layer on substrates, including tool substrates

    DOE Patents [OSTI]

    Chang, R. P. H. (Glenview, IL); Grannen, Kevin J. (Evanston, IL)

    2002-01-01T23:59:59.000Z

    A method of forming a fluorine-bearing diamond layer on non-diamond substrates, especially on tool substrates comprising a metal matrix and hard particles, such as tungsten carbide particles, in the metal matrix. The substrate and a fluorine-bearing plasma or other gas are then contacted under temperature and pressure conditions effective to nucleate fluorine-bearing diamond on the substrate. A tool insert substrate is treated prior to the diamond nucleation and growth operation by etching both the metal matrix and the hard particles using suitable etchants.

  12. Origin of electronic transport of lithium phthalocyanine iodine crystal

    SciTech Connect (OSTI)

    Koike, Noritake; Oda, Masato; Shinozuka, Yuzo [Department of Materials Science and Chemistry, Wakayama University, 930 Sakaedani, Wakayama (Japan)

    2013-12-04T23:59:59.000Z

    The electronic structures of Lithium Phthalocyanine Iodine are investigated using density functional theory. Comparing the band structures of several model crystals, the metallic conductivity of highly doped LiPcI{sub x} can be explained by the band of doped iodine. These results reveal that there is a new mechanism for electronic transport of doped organic semiconductors that the dopant band plays the main role.

  13. Iodine behavior in containment under LWR accident conditions

    SciTech Connect (OSTI)

    Wisbey, S.J.; Beahm, E.C.; Shockley, W.E.; Wang, Y.M.

    1986-01-01T23:59:59.000Z

    The description of containment iodine behavior in reactor accident sequences requires an understanding of iodine volatility effects, deposition and revaporization/resuspension (from surfaces and aerosols), chemical changes between species, and mass transport. The experimental work in this program has largely centered on the interactions of iodine in or with water pools. The formation of volatile iodine, as I/sub 2/ or organic iodides, is primarily dependent on radiation and solution pH. Lower pH results in increased formation of volatile iodine species; thus, for example, a pH of 3.05 resulted in a conversion of I/sup -/ to I/sub 2/ that was more than two orders of magnitude greater than tests run at pH 6.1 or 6.8. The formation or organic iodides involving water pools has been linked to the presence of iodine as I/sub 2/, the solution/gas contact, and to the type of organic material.

  14. Significantly improved piezoelectric thermal stability of cellular polypropylene films by high pressure fluorination and post-treatments

    SciTech Connect (OSTI)

    An Zhenlian [Ministry of Education Key Laboratory of Advanced Microstructure Materials, Department of Physics, Tongji University, 1239 Siping Road, Shanghai 200092 (China); State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an 710049 (China); Mao Mingjun; Cang Jun; Zhang Yewen; Zheng Feihu [Ministry of Education Key Laboratory of Advanced Microstructure Materials, Department of Physics, Tongji University, 1239 Siping Road, Shanghai 200092 (China)

    2012-01-15T23:59:59.000Z

    Cellular polypropylene (PP) films were fluorinated under a high pressure of 13 bar of the F{sub 2}/N{sub 2} mixture and were post-treated by nitrous oxide and isothermal crystallization. The fluorinated and post-treated PP films after being expanded and corona charged exhibit a significantly improved piezoelectric thermal stability. After annealing at 70 deg. C for 151 h or at 90 deg. C for 224 h, the piezoelectric d{sub 33} value of the fluorinated and post-treated piezoelectric sample still retains 58% or 45% of its initial d{sub 33} value, while the corresponding value of the virgin piezoelectric sample has decreased to 29% or 15% of the initial value. Chemical composition analysis of the cross section of the fluorinated and post-treated film by energy-dispersive x-ray spectroscopy indicates that the internal layers have been fluorinated, in spite of a lower degree of fluorination compared with the fluorinated surface layer. Short-circuit and open-circuit TSD current measurements reveal that the fluorinated internal layers, like the fluorinated surface layer, also have very deep charge traps, although there probably is a difference in density of the deep traps between them. The deeply trapped charge on the internal layers of the fluorinated and post-treated piezoelectric sample is responsible for its significantly improved piezoelectric thermal stability.

  15. The Abundance of Fluorine in Normal G and K Stars of the Galactic Thin Disk

    E-Print Network [OSTI]

    Pilachowski, Catherine A

    2015-01-01T23:59:59.000Z

    The abundance of fluorine is determined from the (2-0) R9 2.3358 micron feature of the molecule HF for several dozen normal G and K stars in the Galactic thin disk from spectra obtained with the Phoenix IR spectrometer on the 2.1-m telescope at Kitt Peak. The abundances are analyzed in the context of Galactic chemical evolution to explore the contributions of supernovae and asymptotic giant branch (AGB) stars to the abundance of fluorine in the thin disk. The average abundance of fluorine in the thin disk is found to be [F/Fe] = +0.23 +/- 0.03, and the [F/Fe] ratio is flat or declines slowly with metallicity in the range from -0.6 supernovae contributes significantly to the Galactic fluorine abundance, although contributions from AGB stars may also be important.

  16. Fluorine Plasma Treatments of Poly(propylene) Films, 2 Modeling Reaction Mechanisms and

    E-Print Network [OSTI]

    Kushner, Mark

    Fluorine Plasma Treatments of Poly(propylene) Films, 2 ­ Modeling Reaction Mechanisms and Scalinga of commodity hydrocarbon polymers such as poly(propylene) (PP) can be modified by functionalization with plasma

  17. Spin-rotation contribution to the relaxation time of the fluorine nuclei in benzotrifluoride 

    E-Print Network [OSTI]

    Faulk, Robert Hardy

    1965-01-01T23:59:59.000Z

    of temperature for only the pure benzotrifluoride because the concentration dependence of the relaxation time for the fluorine nuclei is so slight that it can only be detected& but not accurately measured. The results of these meas- urements and th" procedure...SPIN-ROTATION CONTRIBUTION TO THE RELAXATION TIME OF THE FLUORINE NUCLEI IN BENZOTRIFLUORIDE A Thesis By ROBERT HARDY FAULK Submitted to the Graduate College of the Texas ASM University in partial fulfillment of the requirements...

  18. Spin-rotation contribution to the relaxation time of the fluorine nuclei in benzotrifluoride

    E-Print Network [OSTI]

    Faulk, Robert Hardy

    1965-01-01T23:59:59.000Z

    SPIN-ROTATION CONTRIBUTION TO THE RELAXATION TIME OF THE FLUORINE NUCLEI IN BENZOTRIFLUORIDE A Thesis By ROBERT HARDY FAULK Submitted to the Graduate College of the Texas ASM University in partial fulfillment of the requirements... Contributions to the Relaxation Time for the Fluorine 6 Hydrogen Relaxation Time and the Correlation Time 33 35 36 I. INTRODUCTION The spin-rotation interaction may be visualized in the following manner. Because of the inhomogeneous distribution of charge...

  19. Plasma and ion fluorination for chemical hardening of synthetic rubbers. Final report, 30 September 1988-30 September 1989

    SciTech Connect (OSTI)

    Legg, K.O.

    1989-10-01T23:59:59.000Z

    The purpose of this Phase I SBIR program was to investigate ways of fluorinating the surfaces of rubber materials to reduce their susceptibility to wetting and permeation by chemical warfare agents. Nitrile, butyl, and neoprene rubbers were studied. Fluorination was accomplished by direct implantation of ions into the surface and by rf plasma fluorination with freon gases. The rubber materials were examined for contact angle of diethyl malonate (DEM) drops, critical surface tension, and DEM uptake, and were characterized microscopy and ESCA. Ion implantation led to embrittlement and cracking of the surfaces, causing more rapid wetting by DEM. Plasma fluorination tended to deposit a fluorocarbon film on the surface rather than to introduce fluorine into the material. Some of the fluorinated films exhibited greater DEM initial contact angles and slower absorption, although after three hours the absorption rate increased to that of the untreated rubbers. Hence, this treatment provided some temporary improvement, but it was insufficient for proper protection.

  20. Deep Bed Iodine Sorbent Testing FY 2011 Report

    SciTech Connect (OSTI)

    Nick Soelberg; Tony Watson

    2011-08-01T23:59:59.000Z

    Nuclear fission results in the production of fission products (FPs) and activation products that increasingly interfere with the fission process as their concentrations increase. Some of these fission and activation products tend to evolve in gaseous species during used nuclear fuel reprocessing. Analyses have shown that I129, due to its radioactivity, high potential mobility in the environment, and high longevity (half life of 15.7 million years), can require control efficiencies of up to 1,000x or higher to meet regulatory emission limits. Deep-bed iodine sorption testing has been done to evaluate the performance of solid sorbents for capturing iodine in off-gas streams from nuclear fuel reprocessing plants. The objectives of the FY 2011 deep bed iodine sorbent testing are: (1) Evaluate sorbents for iodine capture under various conditions of gas compositions and operating temperature (determine sorption efficiencies, capacities, and mass transfer zone depths); and (2) Generate data for dynamic iodine sorption modeling. Three tests performed this fiscal year on silver zeolite light phase (AgZ-LP) sorbent are reported here. Additional tests are still in progress and can be reported in a revision of this report or a future report. Testing was somewhat delayed and limited this year due to initial activities to address some questions of prior testing, and due to a period of maintenance for the on-line GC. Each test consisted of (a) flowing a synthetic blend of gases designed to be similar to an aqueous dissolver off-gas stream over the sorbent contained in three separate bed segments in series, (b) measuring each bed inlet and outlet gas concentrations of iodine and methyl iodide (the two surrogates of iodine gas species considered most representative of iodine species expected in dissolver off-gas), (c) operating for a long enough time to achieve breakthrough of the iodine species from at least one (preferably the first two) bed segments, and (d) post-test purging with pure N2 to drive loosely or physisorbed iodine species off of the sorbent. Post-test calculations determine the control efficiencies for each bed, iodine loadings on the sorbent, and mass transfer zone depths. Portions of the iodine-laden sorbent from the first bed of two of the tests have been shipped to SNL for waste form studies. Over the past three years, we have explored a full range of inlet iodine and methyl iodide concentrations ranging from {approx}100 ppb to {approx}100 ppm levels, and shown adequate control efficiencies within a bed depth as shallow as 2 inches for lower concentrations and 4 inches for higher concentrations, for the AgZ-type sorbents. We are now performing a limited number of tests in the NC-77 sorbent from SNL. Then we plan to continue to (a) fill in data gaps needed for isotherms and dynamic sorbent modeling, and (b) test the performance of additional sorbents under development.

  1. Low sintering temperature glass waste forms for sequestering radioactive iodine

    DOE Patents [OSTI]

    Nenoff, Tina M.; Krumhansl, James L.; Garino, Terry J.; Ockwig, Nathan W.

    2012-09-11T23:59:59.000Z

    Materials and methods of making low-sintering-temperature glass waste forms that sequester radioactive iodine in a strong and durable structure. First, the iodine is captured by an adsorbant, which forms an iodine-loaded material, e.g., AgI, AgI-zeolite, AgI-mordenite, Ag-silica aerogel, ZnI.sub.2, CuI, or Bi.sub.5O.sub.7I. Next, particles of the iodine-loaded material are mixed with powdered frits of low-sintering-temperature glasses (comprising various oxides of Si, B, Bi, Pb, and Zn), and then sintered at a relatively low temperature, ranging from 425.degree. C. to 550.degree. C. The sintering converts the mixed powders into a solid block of a glassy waste form, having low iodine leaching rates. The vitrified glassy waste form can contain as much as 60 wt % AgI. A preferred glass, having a sintering temperature of 500.degree. C. (below the silver iodide sublimation temperature of 500.degree. C.) was identified that contains oxides of boron, bismuth, and zinc, while containing essentially no lead or silicon.

  2. Summary of FY 2010 Iodine Capture Studies at the INL

    SciTech Connect (OSTI)

    Daryl R. Haefner; Tony L. Watson; Michael G. Jones

    2010-08-01T23:59:59.000Z

    Three breakthrough runs using silver mordenite sorbents were conducted and a dynamic sorption capacity estimated based on MeI analysis from a 2" bed. However, it is now believed the data for the first 2 runs is incomplete because the contributions from elemental iodine were not included. Although the only source of iodine was MeI, elemental iodine was generated within the sorbent bed, presumably from a recombination reaction likely catalyzed by silver mordenite. On-line effluent analysis with a GC was only capable of analyzing MeI, not I2. Scrub samples drawn during Run #3, which are specific for I2, show significant levels of I2 being emitted from a partially spent Ag-mordenite bed. By combining MeI and I2 analyses, a well defined total iodine breakthrough curve can be generated for Run #3. At the conclusion of Run #3 (IONEX Ag-900 was the sorbent) the effluent level from Bed 2 was approaching 70% of the feed concentration. The leading bed (Bed 1) had an estimated average loading of 66 mg I/g sorbent, Bed 2's was 52 mg I/g. The corresponding silver utilizations (assuming formation of AgI) were about 59% and 46%, respectively. The spent sorbents are being sent to Sandia National Laboratories for confirmatory analysis of iodine and silver utilization as well as source material for waste form development.

  3. Reduction of phosphorus diffusion in germanium by fluorine implantation

    SciTech Connect (OSTI)

    El Mubarek, H. A. W. [School of Electrical and Electronic Engineering, University of Manchester, Manchester M13 9PL (United Kingdom)

    2013-12-14T23:59:59.000Z

    The control of phosphorus (P) diffusion in germanium (Ge) is essential for the realisation of ultrashallow n-type junctions in Ge. This work reports a detailed study of the effect of fluorine (F) co-implantation on P diffusion in Ge. P and F profiles were characterized by secondary ion mass spectroscopy. The ion implantation damage was investigated using cross sectional transmission electron microscopy. It is shown that F co-implantation reduces the implanted P profile width and reduces both intrinsic and extrinsic P diffusion in Ge. A defect mediated mechanism for the strong influence of F co-implantation on P diffusion in Ge is proposed and invokes the formation of F{sub n}V{sub m} clusters in the F-amorphized Ge layer. A fraction of these F{sub n}V{sub m} clusters decorate the interstitial type end-of-range defects in the re-grown Ge layer and the rest react during re-growth with interstitial germanium atoms diffusing back from the amorphous crystalline interface. The Ge vacancies are then annihilated and mobile interstitial F is released and out diffuses from the surface. This results in a re-grown Ge layer which has a low vacancy concentration and in which the P diffusion rate is reduced. These results open the way to the realization of enhanced Ge n-type devices.

  4. VAPOUR PHASE CHEMICAL TRANSPORT PROPERTIES OF THE CADMIUM TELLURIDE-IODINE SYSTEM

    E-Print Network [OSTI]

    Boyer, Edmond

    , it was shown that no iodine chemical transport is possible in closed tubes in the hot-cold direction, but only was explained in terms of a reverse (cold-hot) iodine transport associated with a reduced sublimation tendency155 VAPOUR PHASE CHEMICAL TRANSPORT PROPERTIES OF THE CADMIUM TELLURIDE-IODINE SYSTEM C. PAORICI

  5. Evaporation of iodine-containing off-gas scrubber solution

    DOE Patents [OSTI]

    Partridge, J.A.; Bosuego, G.P.

    1980-07-14T23:59:59.000Z

    Mercuric nitrate-nitric acid scrub solutions containing radioiodine may be reduced in volume without excessive loss of volatile iodine. The use of concentrated nitric acid during an evaporation process oxidizes the mercury-iodide complex to a less volatile mercuric iodate precipitate.

  6. Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

    SciTech Connect (OSTI)

    Kathawa, J.; Fry, C.; Thoennessen, M., E-mail: thoennessen@nscl.msu.edu

    2013-01-15T23:59:59.000Z

    Currently, thirty-eight palladium, thirty-eight antimony, thirty-nine tellurium, thirty-eight iodine, and forty xenon isotopes have been observed and the discovery of these isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

  7. Energetics of C-H Bond Activation of Fluorinated Aromatic Hydrocarbons Using a [TpRh(CNneopentyl)] Complex

    E-Print Network [OSTI]

    Jones, William D.

    Energetics of C-H Bond Activation of Fluorinated Aromatic Hydrocarbons Using a [Tp activation of fluorinated aromatic hydrocarbons by [TpRh(CNneopentyl)] resulted in the formation of products of homogeneous transition-metal catalysts to activate and functionalize C-H bonds of hydrocarbons for industrial

  8. Charge-trapping characteristics of fluorinated thin ZrO{sub 2} film for nonvolatile memory applications

    SciTech Connect (OSTI)

    Huang, X. D., E-mail: eexdhuang@gmail.com, E-mail: laip@eee.hku.hk [Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 210096 (China); Shi, R. P.; Lai, P. T., E-mail: eexdhuang@gmail.com, E-mail: laip@eee.hku.hk [Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong (China)

    2014-04-21T23:59:59.000Z

    The effects of fluorine treatment on the charge-trapping characteristics of thin ZrO{sub 2} film are investigated by physical and electrical characterization techniques. The formation of silicate interlayer at the ZrO{sub 2}/SiO{sub 2} interface is effectively suppressed by fluorine passivation. However, excessive fluorine diffusion into the Si substrate deteriorates the quality of the SiO{sub 2}/Si interface. Compared with the ZrO{sub 2}-based memory devices with no or excessive fluorine treatment, the one with suitable fluorine-treatment time shows higher operating speed and better retention due to less resistance of built-in electric field (formed by trapped electrons) against electron injection from the substrate and smaller trap-assisted tunneling leakage, resulting from improved ZrO{sub 2}/SiO{sub 2} and SiO{sub 2}/Si interfaces.

  9. Does administering iodine in radiological procedures increase patient doses?

    SciTech Connect (OSTI)

    He, Wenjun; Yao, Hai, E-mail: haiyao@clemson.edu [Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina 29425 (United States); Huda, Walter; Mah, Eugene [Department of Radiology and Radiological Science, Medical University of South Carolina (MUSC), Charleston, South Carolina 29425 (United States)

    2014-11-01T23:59:59.000Z

    Purpose: The authors investigated the changes in the pattern of energy deposition in tissue equivalent phantoms following the introduction of iodinated contrast media. Methods: The phantom consisted of a small “contrast sphere,” filled with water or iodinated contrast, located at the center of a 28 cm diameter water sphere. Monte Carlo simulations were performed using MCNP5 codes, validated by simulating irradiations with analytical solutions. Monoenergetic x-rays ranging from 35 to 150 keV were used to simulate exposures to spheres containing contrast agent with iodine concentrations ranging from 1 to 100 mg/ml. Relative values of energy imparted to the contrast sphere, as well as to the whole phantom, were calculated. Changes in patterns of energy deposition around the contrast sphere were also investigated. Results: Small contrast spheres can increase local absorbed dose by a factor of 13, but the corresponding increase in total energy absorbed was negligible (<1%). The highest localized dose increases were found to occur at incident photon energies of about 60 keV. For a concentration of about 10 mg/ml, typical of clinical practice, localized absorbed doses were generally increased by about a factor of two. At this concentration of 10 mg/ml, the maximum increase in total energy deposition in the phantom was only 6%. These simulations demonstrated that increases in contrast sphere doses were offset by corresponding dose reductions at distal and posterior locations. Conclusions: Adding iodine can result in values of localized absorbed dose increasing by more than an order of magnitude, but the total energy deposition is generally very modest (i.e., <10%). Their data show that adding iodine primarily changes the pattern of energy deposition in the irradiated region, rather than increasing patient doses per se.

  10. Lanthanum-hexaboride carbon composition for use in corrosive hydrogen-fluorine environments

    DOE Patents [OSTI]

    Holcombe, C.E. Jr.; Kovach, L.; Taylor, A.J.

    1980-01-22T23:59:59.000Z

    The present invention relates to a structural composition useful in corrosive hydrogen-fluorine environments at temperatures in excess of 1400/sup 0/K. The composition is formed of a isostatically pressed and sintered or a hot-pressed mixture of lanthanum hexaboride particles and about 10 to 30 vol% carbon. The lanthanum-hexaboride reacts with the high-temperature fluorine-containing gases to form an adherent layer of corrosion-inhibiting lanthanum trifluoride on exposed surfaces of the composition. The carbon in the composite significantly strengthens the composite, enhances thermal shock resistance, and significantly facilitates the machining of the composition.

  11. Method for selectively removing fluorine and fluorine-containing contaminants from gaseous UF/sub 6/. [ClF/sub 3/

    DOE Patents [OSTI]

    Jones, R.L.; Otey, M.G.; Perkins, R.W.

    1980-11-24T23:59:59.000Z

    This invention is a method for effecting preferential removal and immobilization of certain gaseous contaminants from gaseous UF/sub 6/. The contaminants include fluorine and fluorides which are more reactive with CaCO/sub 3/ than is UF/sub 6/. The method comprises contacting the contaminant-carrying UF/sub 6/ with particulate CaCO/sub 3/ at a temperature effecting reaction of the contaminant and the CaCO/sub 3/.

  12. Preparation of Solid Alkaline Fuel Cell Binders Based on Fluorinated Poly(diallyldimethylammonium chloride)s

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Preparation of Solid Alkaline Fuel Cell Binders Based on Fluorinated Poly to be used in a Solid Alkaline Fuel Cell (SAFC) needs to (i) be insoluble in both aqueous solutions,10% > 320 °C). When used in a fuel cell as a binder in the membrane-electrodes assembly (MEA

  13. EPR studies on fluorocarbon microspheres. Dynamic polarization of fluorine nuclei and adsorbed He3

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1033 EPR studies on fluorocarbon microspheres. Dynamic polarization of fluorine nuclei and adsorbed centres paramagné- tiques électroniques dans les microbilles de fluorocarbone. Ces centres sont des.8 1018/cc) of electronic paramagnetic centres in microspheres of fluorocarbon. These centres are peroxy

  14. Fluorine-19 MRI for Visualization and Quantification of Cell Migration in a Diabetes Model

    E-Print Network [OSTI]

    Laidlaw, David

    Fluorine-19 MRI for Visualization and Quantification of Cell Migration in a Diabetes Model Mangala the nonobese dia- betic mouse, an established model of type 1 diabetes, 19F MRI data were acquired showing Med 58: 725­734, 2007. © 2007 Wiley-Liss, Inc. Key words: T cells; diabetes; MRI; cell tracking

  15. Steady-State Modeling of a Parallel-Plate Electrochemical Fluorination Reactor

    E-Print Network [OSTI]

    Weidner, John W.

    Steady-State Modeling of a Parallel-Plate Electrochemical Fluorination Reactor Kamal Jha *,a Gerald, Minnesota 55144-1000, USA ABSTRACT A steady-state mathematical model of a parallel-plate reactor balances. Profiles of temperature, pressure, vapor volume fraction, and current density in the reactor

  16. Iodine-131 releases from the Hanford Site, 1944--1947

    SciTech Connect (OSTI)

    Heeb, C.M.

    1993-03-01T23:59:59.000Z

    Detailed results of the Hanford Environmental Dose Reconstruction project (HEDR) iodine-131 release reconstruction are presented in this volume. Included are daily data on B, D, and F Plant, reactor operations from the P-Department Daily Reports (General Electric Company 1947). Tables of B and T Plant material processed from the three principal sources on separations plant operations: The Jaech report (Jaech undated), the 200 Area Report (Acken and Bird 1945; Bird and Donihee 1945), and the Metal History Reports (General Electric Company 1946). A transcription of the Jaech report is also provided because it is computer-generated and is not readily readable in its original format. The iodine-131 release data are from the STRM model. Cut-by-cut release estimates are provided, along with daily, monthly, and yearly summations. These summations are based on the hourly release estimates. The hourly data are contained in a 28 megabyte electronic file. Interested individuals may request a copy.

  17. Investigation of silver electrodeposition on polycrystalline platinum by iodine chemisorption

    E-Print Network [OSTI]

    Harris, John Eugene

    1988-01-01T23:59:59.000Z

    University Chair of Advisory Committee: Dr. Manuel P. Soriaga The surface electrochemical properties of Ag layers electmdeposited on smooth polycrystalline Pt electrodes have been investigated through changes in the redox behavior of I chemisorbed... an intercept which can be identified with the redox potential E I( d for the I( d ) & ? & I (, reaction. Values of -0. 36V and -0. 32V were I(ads) (ads) (aq) obtained for Pt and Ir, respectively. In contrast, the iodine reductive desorption process on Au...

  18. Iodine Loading of NO Aged Silver Exchanged Mordenite

    SciTech Connect (OSTI)

    Patton, K. K. [ORNL; Bruffey, S. H. [ORNL; Jubin, J. T. [ORNL; Walker, Jr., J. F. [ORNL

    2014-09-30T23:59:59.000Z

    In an off-gas treatment system for used nuclear fuel processing, a solid sorbent will typically be exposed to a gas stream for months at a time. This gas stream may be at elevated temperature and could contain water vapor, gaseous nitrogen oxides (NO{sub x}), nitric acid vapors, and a variety of other constituents. For this reason, it is important to evaluate the effects of long-term exposure, or aging, on proposed sorbents. Silver exchanged mordenite (AgZ) is being studied at Oak Ridge National Laboratory (ORNL) to determine its iodine sorption capacity after long term exposure to increasingly more complex chemical environments. Studies previously conducted at ORNL investigated the effects of aging reduced silver exchanged mordenite (Ag{sup 0}Z) in dry air, moist air, and NO2. This study investigated the effects of extended exposure to nitric oxide (NO) gas on the iodine capture performance of Ag{sup 0}Z. A deep bed of Ag{sup 0}Z was aged in a 1% nitric oxide (NO) air stream, and portions of the bed were removed at pre-determined intervals. After being removed from the NO stream, each sample was loaded with iodine in a thin bed configuration. These samples were analyzed by neutron activation analysis (NAA) to quantify the iodine content in the sample. Samples were removed at one week and one month. A 78% decrease in sample capacity was seen after one week of exposure, with no further decrease observed after 1 month of aging. The observed loss in capacity is larger in magnitude than previous studies exposing Ag{sup 0}Z to dry air, moist air, or NO2 gas. The aging study was terminated after one month and repeated; this successfully demonstrated the reproducibility of the results.

  19. Desorption and sublimation kinetics for fluorinated aluminum nitride surfaces

    SciTech Connect (OSTI)

    King, Sean W., E-mail: sean.king@intel.com; Davis, Robert F. [Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695 (United States); Nemanich, Robert J. [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States)

    2014-09-01T23:59:59.000Z

    The adsorption and desorption of halogen and other gaseous species from surfaces is a key fundamental process for both wet chemical and dry plasma etch and clean processes utilized in nanoelectronic fabrication processes. Therefore, to increase the fundamental understanding of these processes with regard to aluminum nitride (AlN) surfaces, temperature programmed desorption (TPD) and x-ray photoelectron spectroscopy (XPS) have been utilized to investigate the desorption kinetics of water (H{sub 2}O), fluorine (F{sub 2}), hydrogen (H{sub 2}), hydrogen fluoride (HF), and other related species from aluminum nitride thin film surfaces treated with an aqueous solution of buffered hydrogen fluoride (BHF) diluted in methanol (CH{sub 3}OH). Pre-TPD XPS measurements of the CH{sub 3}OH:BHF treated AlN surfaces showed the presence of a variety of Al-F, N-F, Al-O, Al-OH, C-H, and C-O surfaces species in addition to Al-N bonding from the AlN thin film. The primary species observed desorbing from these same surfaces during TPD measurements included H{sub 2}, H{sub 2}O, HF, F{sub 2}, and CH{sub 3}OH with some evidence for nitrogen (N{sub 2}) and ammonia (NH{sub 3}) desorption as well. For H{sub 2}O, two desorption peaks with second order kinetics were observed at 195 and 460?°C with activation energies (E{sub d}) of 51?±?3 and 87?±?5?kJ/mol, respectively. Desorption of HF similarly exhibited second order kinetics with a peak temperature of 475?°C and E{sub d} of 110?±?5?kJ/mol. The TPD spectra for F{sub 2} exhibited two peaks at 485 and 585?°C with second order kinetics and E{sub d} of 62?±?3 and 270?±?10?kJ/mol, respectively. These values are in excellent agreement with previous E{sub d} measurements for desorption of H{sub 2}O from SiO{sub 2} and AlF{sub x} from AlN surfaces, respectively. The F{sub 2} desorption is therefore attributed to fragmentation of AlF{sub x} species in the mass spectrometer ionizer. H{sub 2} desorption exhibited an additional high temperature peak at 910?°C with E{sub d}?=?370?±?10?kJ/mol that is consistent with both the dehydrogenation of surface AlOH species and H{sub 2} assisted sublimation of AlN. Similarly, N{sub 2} exhibited a similar higher temperature desorption peak with E{sub d}?=?535?±?40?kJ/mol that is consistent with the activation energy for direct sublimation of AlN.

  20. A Sensitive Determination of Iodine Species, Including Organoiodine, for Freshwater and Seawater Samples Using High Performance Liquid Chromatography and Spectrophotometric Detection

    E-Print Network [OSTI]

    Schwehr, K. A.; Santschi, P. H.

    In order to more effectively use iodine isotope ratios, 129I/127I, as hydrological and geochemical tracers in aquatic systems, a new HPLC method was developed for the determination of iodine speciation. The dissolved iodine species that dominate...

  1. Transition of Iodine Analysis to Accelerator Mass Spectrometry

    SciTech Connect (OSTI)

    M. L. Adamic; J. E. Olson; D. D. Jenson; J. G. Eisenmenger; M. G. Watrous

    2012-09-01T23:59:59.000Z

    This NA 22 funded research project investigated the transition of iodine isotopic analyses from thermal ionization mass spectrometry (TIMS) to an accelerator mass spectrometry (AMS) system. Previous work (Fiscal Year 2010) had demonstrated comparable data from TIMS and AMS. With AMS providing comparable data with improved background levels and vastly superior sample throughput, improvement in the sample extraction from environmental sample matrices was needed to bring sample preparation throughput closer to the operation level of the instrument. Previous research used an extraction chemistry that was not optimized for yield or refined for reduced labor to prove the principle. This research was done to find an extraction with better yield using less labor per sample to produce a sample ready for the AMS instrument. An extraction method using tetramethyl ammonium hydroxide (TMAH) was developed for removal of iodine species from high volume air filters. The TMAH with gentle heating was superior to the following three extraction methods: ammonium hydroxide aided by sonication, acidic and basic extraction aided by microwave, and ethanol mixed with sodium hydroxide. Taking the iodine from the extraction solvent to being ready for AMS analysis was accomplished by a direct precipitation, as well as, using silver wool to harvest the iodine from the TMAH. Portions of the same filters processed in FY 2010 were processed again with the improved extraction scheme followed by successful analysis by AMS at the Swiss Federal Institute of Technology. The data favorably matched the data obtained in 2010. The time required for analysis has been reduced over the aqueous extraction/AMS approach developed in FY 2010. For a hypothetical batch of 30 samples, the AMS methodology is about 10 times faster than the traditional gas phase chemistry and TIMS analysis. As an additional benefit, background levels for the AMS method are about 1000 times lower than TIMS. This results from the fundamental mechanisms of ionization in the AMS system and which produces a beneficial cleanup of molecular interferences. Continued clean operation of the extraction process was demonstrated through blank analysis included with all sample sets analyzed. INL work showed improvement on the first year’s demonstration of AMS vs. TIMS. An improved extraction of high volume air filters followed by isotopic analysis by AMS, can be used successfully to make iodine measurements with results comparable to those obtained by filter combustion and TIMS analysis. More progress on the conversion from an extract solution to an AMS sample ready for analysis is still needed. Although the preparation scheme through AMS is already at a higher performing thoughput than TIMS, the chemical preparation cannot match the instrument capability for number of samples per day without further development.

  2. Effects of porous carbon additives and induced fluorine on low dielectric constant polyimide synthesized with an e-beam

    SciTech Connect (OSTI)

    Im, Ji Sun [Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Yuseong-Gu, Daejeon 305-764 (Korea, Republic of)] [Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Yuseong-Gu, Daejeon 305-764 (Korea, Republic of); Bae, Tae-Sung [Korea Basic Science Institute (KBSI), Jeonju 561-756 (Korea, Republic of)] [Korea Basic Science Institute (KBSI), Jeonju 561-756 (Korea, Republic of); Lee, Sung Kyu [Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Yuseong-Gu, Daejeon 305-764 (Korea, Republic of)] [Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Yuseong-Gu, Daejeon 305-764 (Korea, Republic of); Lee, Sei-Hyun [Department of Electrical and Electronic Engineering, Korea Polytechnic IV College, Daejeon 300-702 (Korea, Republic of)] [Department of Electrical and Electronic Engineering, Korea Polytechnic IV College, Daejeon 300-702 (Korea, Republic of); Jeong, Euigyung [Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Yuseong-Gu, Daejeon 305-764 (Korea, Republic of)] [Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Yuseong-Gu, Daejeon 305-764 (Korea, Republic of); Kang, Phil Hyun [Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeollabuk-do 580-185 (Korea, Republic of)] [Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeollabuk-do 580-185 (Korea, Republic of); Lee, Young-Seak, E-mail: youngslee@cnu.ac.kr [Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Yuseong-Gu, Daejeon 305-764 (Korea, Republic of)] [Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Yuseong-Gu, Daejeon 305-764 (Korea, Republic of)

    2010-11-15T23:59:59.000Z

    We report the synthesis of a polyimide matrix with a low dielectric constant for application as an intercalation material between metal interconnections in electronic devices. Porous activated carbon was embedded in the polyimide to reduce the dielectric constant, and a thin film of the complex was obtained using the spin-coating and e-beam irradiation methods. The surface of the thin film was modified with fluorine functional groups to impart water resistance and reduce the dielectric constant further. The water resistance was significantly improved by the modification with hydrophobic fluorine groups. The dielectric constant was effectively decreased by porous activated carbon. The fluorine modification also resulted in a low dielectric constant on the polyimide surface by reducing the polar surface free energy. The dielectric constant of polyimide film decreased from 2.98 to 1.9 by effects of porous activated carbon additive and fluorine surface modification.

  3. The effect of silica gel sampling tube design on the analytical recovery of fluorine ions / by Daniel Howard Anna 

    E-Print Network [OSTI]

    Anna, Daniel Howard

    1991-01-01T23:59:59.000Z

    THE EFFECT OF SILICA GEL SAMPLING TUBE DESIGN ON THE ANALYTICAL RECOVERY OF FLUORINE IONS A Thesis by DANIEL HOWARD ANNA Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1991 Major Subject: Industrial Hygiene THE EFFECI' OF SILICA GEL SAMPLING TUBE DESIGN ON THE ANALYTICAL RECOVERY OF FLUORINE IONS A Thesis by DANIEL HOWARD ANNA Approved as to style and content by: Ri rd B. n...

  4. The effect of silica gel sampling tube design on the analytical recovery of fluorine ions / by Daniel Howard Anna

    E-Print Network [OSTI]

    Anna, Daniel Howard

    1991-01-01T23:59:59.000Z

    THE EFFECT OF SILICA GEL SAMPLING TUBE DESIGN ON THE ANALYTICAL RECOVERY OF FLUORINE IONS A Thesis by DANIEL HOWARD ANNA Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1991 Major Subject: Industrial Hygiene THE EFFECI' OF SILICA GEL SAMPLING TUBE DESIGN ON THE ANALYTICAL RECOVERY OF FLUORINE IONS A Thesis by DANIEL HOWARD ANNA Approved as to style and content by: Ri rd B. n...

  5. Polymer electrolyte membranes from fluorinated polyisoprene-block-sulfonated polystyrene: Structural evolution with hydration and heating

    SciTech Connect (OSTI)

    Sodeye, Akinbode [Department of Polymer Science and Engineering, University of Massachusetts; Huang, Tianzi [University of Tennessee, Knoxville (UTK); Gido, Samuel [University of Massachusetts, Amherst; Mays, Jimmy [ORNL

    2011-01-01T23:59:59.000Z

    Small-angle neutron scattering (SANS) and ultra-small-angle X-ray scattering (USAXS) have been used to study the structural changes in fluorinated polyisoprene/sulfonated polystyrene (FISS) diblock copolymers as they evolved from the dry state to the water swollen state. A dilation of the nanometer-scale hydrophilic domains has been observed as hydration increased, with greater dilation occurring in the more highly sulfonated samples or upon hydration at higher temperatures. Furthermore, a decrease in the order in these phase separated structures is observed upon swelling. The glass transition temperatures of the fluorinated blocks have been observed to decrease upon hydration of these materials, and at the highest hydration levels, differential scanning calorimetry (DSC) has shown the presence of tightly bound water. A precipitous drop in the mechanical integrity of the 50% sulfonated materials is also observed upon exceeding the glass transition temperature (Tg), as measured by dynamic mechanical analysis (DMA).

  6. Asymmetrical Self-assembly From Fluorinated and Sulfonated Block Copolymers in Aqueous Media

    SciTech Connect (OSTI)

    Wang, Xiaojun [ORNL; Hong, Kunlun [ORNL; Baskaran, Durairaj [University of Tennessee, Knoxville (UTK); Goswami, Monojoy [ORNL; Sumpter, Bobby G [ORNL; Mays, Jimmy [ORNL

    2011-01-01T23:59:59.000Z

    Block copolymers of fluorinated isoprene and partially sulfonated styrene form novel tapered rods and ribbon-like micelles in aqueous media due to a distribution of sulfonation sites and a large Flory-Huggins interaction parameter. A combination of microscopy, light scattering, and simulation demonstrates the presence of these unique nanostructures. This study sheds light on the micellization behavior of amphiphilic block polymers by revealing a new mechanism of self-assembly.

  7. Recent Electric Oxygen-Iodine Laser Experiments and Modeling David L. Carrolla

    E-Print Network [OSTI]

    Carroll, David L.

    and modeling have led to a continuing evolution of the Electric Oxygen-Iodine Laser (ElectricOIL) system. A new experiments and modeling of our ElectricOIL system. 2. EXPERIMENTS The ElectricOIL system consists primarilyRecent Electric Oxygen-Iodine Laser Experiments and Modeling David L. Carrolla , Gabriel F

  8. Zeolite Salt Occlusion: A Potential Route for the Immobilisation of Iodine-129? Neil C. Hyatt,1*

    E-Print Network [OSTI]

    Sheffield, University of

    Zeolite ­ Salt Occlusion: A Potential Route for the Immobilisation of Iodine-129? Neil C. Hyatt,1 examined as possible starting routes to the long term immobilisation of iodine-129. Heating the salts, where the iodide salt migrates into the zeolite pores. Detailed studies of the Na-A / 5AgI complex

  9. Experimental Effects of Atomic Oxygen on the Development of an Electric Discharge Oxygen Iodine Laser

    E-Print Network [OSTI]

    Carroll, David L.

    state I. Conventionally, a two-phase (gas-liquid) chemistry singlet oxygen generator (SOG) producesExperimental Effects of Atomic Oxygen on the Development of an Electric Discharge Oxygen Iodine of the electric discharge iodine laser continues, the role of oxygen atoms downstream of the discharge region

  10. Some Investigations of the Reaction of Activated Charcoal with Fluorine and Uranium Hexafluoride

    SciTech Connect (OSTI)

    Del Cul, G.D.; Fiedor, J.N.; Simmons, D.W.; Toth, L.M.; Trowbridge, L.D.; Williams

    1998-09-01T23:59:59.000Z

    The Molten Salt Reactor Experiment (MSRE) at Oak Ridge National Laboratory has been shut down since 1969, when the fuel salt was drained from the core into two Hastelloy N drain tanks at the reactor site. Over time, fluorine (F{sub 2}) and uranium hexafluoride (UF{sub 6}) moved from the salt through the gas piping to a charcoal bed, where they reacted with the activated charcoal. Some of the immediate concerns related to the migration of F{sub 2} and UF{sub 6} to the charcoal bed were the possibility of explosive reactions between the charcoal and F{sub 2}, the existence of conditions that could induce a criticality accident, and the removal and recovery of the fissile uranium from the charcoal. This report addresses the reactions and reactivity of species produced by the reaction of fluorine and activated charcoal and between charcoal and F{sub 2}-UF{sub 6} gas mixtures in order to support remediation of the MSRE auxiliary charcoal bed (ACB) and the recovery of the fissile uranium. The chemical identity, stoichiometry, thermochemistry, and potential for explosive decomposition of the primary reaction product, fluorinated charcoal, was determined.

  11. Soil Iodine Determination in Deccan Syneclise, India: Implications for Near Surface Geochemical Hydrocarbon Prospecting

    SciTech Connect (OSTI)

    Mani, Devleena, E-mail: devleenatiwari@ngri.res.in [National Geophysical Research Institute (Council of Scientific and Industrial Research) (India); Kumar, T. Satish [Oil India Limited (India); Rasheed, M. A.; Patil, D. J.; Dayal, A. M.; Rao, T. Gnaneshwar; Balaram, V. [National Geophysical Research Institute (Council of Scientific and Industrial Research) (India)

    2011-03-15T23:59:59.000Z

    The association of iodine with organic matter in sedimentary basins is well documented. High iodine concentration in soils overlying oil and gas fields and areas with hydrocarbon microseepage has been observed and used as a geochemical exploratory tool for hydrocarbons in a few studies. In this study, we measure iodine concentration in soil samples collected from parts of Deccan Syneclise in the west central India to investigate its potential application as a geochemical indicator for hydrocarbons. The Deccan Syneclise consists of rifted depositional sites with Gondwana-Mesozoic sediments up to 3.5 km concealed under the Deccan Traps and is considered prospective for hydrocarbons. The concentration of iodine in soil samples is determined using ICP-MS and the values range between 1.1 and 19.3 ppm. High iodine values are characteristic of the northern part of the sampled region. The total organic carbon (TOC) content of the soil samples range between 0.1 and 1.3%. The TOC correlates poorly with the soil iodine (r{sup 2} < 1), indicating a lack of association of iodine with the surficial organic matter and the possibility of interaction between the seeping hydrocarbons and soil iodine. Further, the distribution pattern of iodine compares well with two surface geochemical indicators: the adsorbed light gaseous hydrocarbons (methane through butane) and the propane-oxidizing bacterial populations in the soil. The integration of geochemical observations show the occurrence of elevated values in the northern part of the study area, which is also coincident with the presence of exposed dyke swarms that probably serve as conduits for hydrocarbon microseepage. The corroboration of iodine with existing geological, geophysical, and geochemical data suggests its efficacy as one of the potential tool in surface geochemical exploration of hydrocarbons. Our study supports Deccan Syneclise to be promising in terms of its hydrocarbon prospects.

  12. Determination of Iodine-129 in Low Level Radioactive Wastes - 13334

    SciTech Connect (OSTI)

    Choi, K.C.; Ahn, J.H.; Park, Y.J.; Song, K.S. [Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, Daejeon, 305-600 (Korea, Republic of)] [Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, Daejeon, 305-600 (Korea, Republic of)

    2013-07-01T23:59:59.000Z

    For the radioactivity determination of {sup 129}I in the radioactive wastes, alkali fusion and anion-exchange resin separation methods, which are sample pretreatment methods, have been investigated in this study. To separate and quantify the {sup 129}I radionuclide in an evaporator bottom and spent resin, the radionuclide was chemically leached from the wastes and adsorbed on an anion exchange resin at pH 4, 7, 9. In the case of dry active waste and another solid type, the alkali fusion method was applied. KNO{sub 3} was added as a KOH and oxidizer to the wastes. It was then fused at 450 deg. C for 1 hour. The radioactivity of the separated iodine was measured with a low energy gamma spectrometer after the sample pretreatment. Finally, it was confirmed that the recovery rate of the iodine for the alkali fusion method was 83.6±3.8%, and 86.4±1.6% for the anionic exchange separation method. (authors)

  13. Iodine Solubility in Low-Activity Waste Borosilicate Glass at 1000 °C

    SciTech Connect (OSTI)

    Riley, Brian J.; Schweiger, Michael J.; Kim, Dong-Sang; Lukens, Wayne W.; Williams, Benjamin D.; Iovin, Cristian; Rodriguez, Carmen P.; Overman, Nicole R.; Bowden, Mark E.; Dixon, Derek R.; Crum, Jarrod V.; Mccloy, John S.; Kruger, Albert A.

    2014-04-30T23:59:59.000Z

    The purpose of this study was to determine the solubility of iodine in a low-activity waste borosilicate glass when heated inside an evacuated and sealed fused quartz ampoule. The iodine was added to glass frit as KI in quantities of 100–24000 ppm iodine (by mass), each mixture was added to an ampoule, the ampoule was heated at 1000 °C for 2 h and then air quenched. In samples with ?12000 ppm iodine, low viscosity salt phases were observed on the surface of the melts during cooling that solidified into a white coating upon cooling. These salts were identified as mixtures of KI, NaI, and Na2SO4 with X-ray diffraction (XRD). The iodine concentrations in glass specimens were analyzed with inductively-coupled plasma mass spectrometry and the overall iodine solubility was determined to be 10000 ppm by mass. Several crystalline inclusions of iodine sodalite, Na8(AlSiO4)6I2, were observed in the 24000 ppm specimen and were verified with micro-XRD and wavelength dispersive spectroscopy.

  14. On the Use of Thermal NF3 as the Fluorination and Oxidation Agent in Treatment of Used Nuclear Fuels

    SciTech Connect (OSTI)

    Scheele, Randall D.; McNamara, Bruce K.; Casella, Andrew M.; Kozelisky, Anne E.

    2012-05-01T23:59:59.000Z

    This paper presents results of our investigation on the use of nitrogen trifluoride as the fluorination or fluorination/oxidation agent for use in a process for separating valuable constituents from used nuclear fuels by employing the volatility of many transition metal and actinide fluorides. Nitrogen trifluoride is less chemically and reactively hazardous than the hazardous and aggressive fluorinating agents used to prepare uranium hexafluoride and considered for fluoride volatility based nuclear fuels reprocessing. In addition, nitrogen trifluoride’s less aggressive character may be used to separate the volatile fluorides from used fuel and from themselves based on the fluorination reaction’s temperature sensitivity (thermal tunability) rather than relying on differences in sublimation/boiling temperature and sorbents. Our thermodynamic calculations found that nitrogen trifluoride has the potential to produce volatile fission product and actinide fluorides from candidate oxides and metals. Our simultaneous thermogravimetric and differential thermal analyses found that the oxides of lanthanum, cerium, rhodium, and plutonium fluorinated but did not form volatile fluorides and that depending on temperature volatile fluorides formed from the oxides of niobium, molybdenum, ruthenium, tellurium, uranium, and neptunium. We also demonstrated near-quantitative removal of uranium from plutonium in a mixed oxide.

  15. Storage of LWR spent fuel in air. Volume 3, Results from exposure of spent fuel to fluorine-contaminated air

    SciTech Connect (OSTI)

    Cunningham, M.E.; Thomas, L.E.

    1995-06-01T23:59:59.000Z

    The Behavior of Spent Fuel in Storage (BSFS) Project has conducted research to develop data on spent nuclear fuel (irradiated U0{sub 2}) that could be used to support design, licensing, and operation of dry storage installations. Test Series B conducted by the BSFS Project was designed as a long-term study of the oxidation of spent fuel exposed to air. It was discovered after the exposures were completed in September 1990 that the test specimens had been exposed to an atmosphere of bottled air contaminated with an unknown quantity of fluorine. This exposure resulted in the test specimens reacting with both the oxygen and the fluorine in the oven atmospheres. The apparent source of the fluorine was gamma radiation-induced chemical decomposition of the fluoro-elastomer gaskets used to seal the oven doors. This chemical decomposition apparently released hydrofluoric acid (HF) vapor into the oven atmospheres. Because the Test Series B specimens were exposed to a fluorine-contaminated oven atmosphere and reacted with the fluorine, it is recommended that the Test Series B data not be used to develop time-temperature limits for exposure of spent nuclear fuel to air. This report has been prepared to document Test Series B and present the collected data and observations.

  16. Iodine Adsorption on Ion-Exchange Resins and Activated Carbons– Batch Testing

    SciTech Connect (OSTI)

    Parker, Kent E.; Golovich, Elizabeth C.; Wellman, Dawn M.

    2014-09-30T23:59:59.000Z

    Iodine sorption onto seven resins and six carbon materials was evaluated using water from well 299-W19-36 on the Hanford Site. These materials were tested using a range of solution-to-solid ratios. The test results are as follows: • The efficacy of the resin and granular activated carbon materials was less than predicted based on manufacturers’ performance data. It is hypothesized that this is due to the differences in speciation previously determined for Hanford groundwater. • The sorption of iodine is affected by the iodine species in the source water. Iodine loading on resins using source water ranged from 1.47 to 1.70 µg/g with the corresponding Kd values from 189.9 to 227.0 mL/g. The sorption values when the iodine is converted to iodide ranged from 2.75 to 5.90 µg/g with the corresponding Kd values from 536.3 to 2979.6 mL/g. It is recommended that methods to convert iodine to iodide be investigated in fiscal year (FY) 2015. • The chemicals used to convert iodine to iodate adversely affected the sorption of iodine onto the carbon materials. Using as-received source water, loading and Kd values ranged from 1.47 to 1.70 µg/g and 189.8 to 226.3 mL/g respectively. After treatment, loading and Kd values could not be calculated because there was little change between the initial and final iodine concentration. It is recommended the cause of the decrease in iodine sorption be investigated in FY15. • In direct support of CH2M HILL Plateau Remediation Company, Pacific Northwest National Laboratory has evaluated samples from within the 200W pump and treat bioreactors. As part of this analysis, pictures taken within the bioreactor reveal a precipitate that, based on physical properties and known aqueous chemistry, is hypothesized to be iron pyrite or chalcopyrite, which could affect iodine adsorption. It is recommended these materials be tested at different solution-to-solid ratios in FY15 to determine their effect on iodine sorption.

  17. Resistivity measurements of iodine single crystals by an A.C. technique

    E-Print Network [OSTI]

    Intararithi, Thanom

    1965-01-01T23:59:59.000Z

    . measure- ment and could be responsible for the disagreement. Another object is to de- termine any frequency dependence of the resistivity of iodine single crystals which might give information concerning the reasons for the increase in acti- vation... the assembly used in the resublimation. TO DIFFUSION FUMP S, ;U I. IQUID NITRO&EN C 33 A O'LASS WOOJ- F EACrE NT-&'RADE IODINE The reagent-grade iodine is initially in tube A. A trap T filled with liquid nitrogen prevents the contamination of the pump...

  18. Systematic study of iodine nuclei in A?125 mass region

    SciTech Connect (OSTI)

    Sharma, H. P.; Chakraborty, S.; Kumar, A. [Department of Physics, Banaras Hindu University, Varanasi-221005 (India); Banerjee, P. [Division of Nuclear Physics, Saha Institute of Nuclear Physics, Kolkata-700064 (India); Ganguly, S. [Department of Physics, Chandernagore College, Chandannagar-721136 (India); Muralithar, S.; Singh, R. P. [Inter University Accelerator Center, New Delhi-110067 (India); Kumar, A.; Kaur, N. [Department of Physics, Punjab University, Chandigarh-160014 (India); Kumar, S. [Department of Physics and Astrophysics, University of Delhi, New Delhi-110067 (India); Chaturvedi, L. [Department of Pure and Applied Physics, Guru Ghasidas Vishwavidyalaya, Bilaspur-495009 (India); Jain, A. K. [Department of Physics, Indian Institute of Technology, Roorkee-247667 (India); Laxminarayan, S. [Department of Physics, Andhra University, Visakhapatnam-530003 (India)

    2014-08-14T23:59:59.000Z

    Excited states of {sup 127}I were populated via {sup 124}Sn({sup 7}Li,{sup 4}n?){sup 127}I fusion-evaporation reaction at beam energy of 33 MeV. Multipolarities of several transitions were determined and spins of corresponding states have been confirmed. The band-head spin and parity of an already reported band at 2901.2 keV has been confirmed. Based on the observed characteristic features and by comparing with the systematics of odd mass iodine nuclei, a ?g{sub 7/2}??h{sub 11/2}{sup 2} configuration has been proposed for this band. The experimental B(M1)/B(E2) values for ?g{sub 7/2} band were compared with the theoretical results of semi classical model of Frauendorf and Donau and found in well agreement.

  19. ALTERNATIVE FLOWSHEETS FOR THE SULFUR-IODINE THERMOCHEMICAL HYDROGEN CYCLE

    SciTech Connect (OSTI)

    BROWN,LC; LENTSCH,RD; BESENBRUCH,GE; SCHULTZ,KR; FUNK,JE

    2003-02-01T23:59:59.000Z

    OAK-B135 A hydrogen economy will need significant new sources of hydrogen. Unless large-scale carbon sequestration can be economically implemented, use of hydrogen reduces greenhouse gases only if the hydrogen is produced with non-fossil energy sources. Nuclear energy is one of the limited options available. One of the promising approaches to produce large quantities of hydrogen from nuclear energy efficiently is the Sulfur-Iodine (S-I) thermochemical water-splitting cycle, driven by high temperature heat from a helium Gas-Cooled Reactor. They have completed a study of nuclear-driven thermochemical water-splitting processes. The final task of this study was the development of a flowsheet for a prototype S-I production plant. An important element of this effort was the evaluation of alternative flowsheets and selection of the reference design.

  20. Sulfur-Iodine Integrated Lab Scale Experiment Development

    SciTech Connect (OSTI)

    Russ, Ben

    2011-05-27T23:59:59.000Z

    The sulfur-iodine (SI) cycle was deermined to be the best cycle for coupling to a high temperature reactor (HTR) because of its high efficiency and potential for further improvement. The Japanese Atomic Energy Agency (JAEA) has also selected the SI process for further development and has successfully completed bench-scale demonstrations of the SI process at atmospheric pressure. JEA also plans to proceed with pilot-scale demonstrations of the SI process and eventually plans to couple an SI demonstration plant to its High Temperature Test Reactor (HHTR). As part of an international NERI project, GA, SNL, and the Frech Commissariat L'Energie Atomique performed laboratory-scale demonstrations of the SI process at prototypical temperatures and pressures. This demonstration was performed at GA in San Diego, CA and concluded in April 2009.

  1. Cerebral perfusion imaging with iodine 123-labeled amines

    SciTech Connect (OSTI)

    Holman, B.L.; Hill, T.C.; Polak, J.F.; Lee, R.G.; Royal, H.D.; O'Leary, D.H.

    1984-10-01T23:59:59.000Z

    Two amines, N-isopropyl p-iodoamphetamine and N,N,N'-trimethyl-N'-(2-hydroxyl-3-methyl-5-iodobenzyl)-1,3-prop anediamine, have been labeled with iodine 123. The brain uptake of these radioactive tracers is proportional to cerebral blood flow. These tracers are retained in the brain for a sufficiently long time so that imaging can be performed with standard, readily available instrumentation. Transaxial tomography with amines is useful in acute cerebral infarction, in which the x-ray computed tomographic scan may be normal for several days after onset of symptoms while the uptake of radioisotope-labeled amines will be altered immediately after the onset of the stroke. It is also useful in examining patients with cerebral vascular disease and in the preoperative examination of patients with partial epilepsy.

  2. A Stable Fluorinated and Alkylated Lithium Malonatoborate Salt for Lithium Ion Battery Application

    SciTech Connect (OSTI)

    Wan, Shun [ORNL; Jiang, Xueguang [ORNL; Guo, Bingkun [ORNL; Dai, Sheng [ORNL; Sun, Xiao-Guang [ORNL

    2015-01-01T23:59:59.000Z

    A new fluorinated and alkylated lithium malonatoborate salt, lithium bis(2-methyl-2-fluoromalonato)borate (LiBMFMB), has been synthesized for lithium ion battery application. A 0.8 M LiBMFMB solution is obtained in a mixture of ethylene carbonate (EC) and ethyl methyl carbonate (EMC) (1:2 by wt.). The new LiBMFMB based electrolyte exhibits good cycling stability and rate capability in LiNi0.5Mn1.5O4 and graphite based half-cells.

  3. Materials for high-temperature hydrogen fluorine environments. Final report, June 1976-December 1978

    SciTech Connect (OSTI)

    Holcombe, C.E. Jr.; Kovach, L.

    1981-03-01T23:59:59.000Z

    A determination has been made of the stability of 35 materials under high-temperature, fluorine rich, hydrogen fluoride torch testing. Refractory materials tested included 4 borides, 3 carbides, 3 nitrides, 12 oxides, 1 oxynitride, 1 sulfide, 10 metals, and carbon (10 types). Three materials distinctly performed better than nickel: lanthanum hexaboride, calcium hexaboride, and lanthanum silicon oxynitride. Of these, lanthanum hexaboride is the best candidate tested since it has an estimated upper use temperature > 1726 K, which is above the melting point and more than 300 K above the upper use temperature of nickel.

  4. Polymer electrolyte membranes from fluorinated polyisoprene-block-sulfonated polystyrene: Microdomain orientation by external field

    SciTech Connect (OSTI)

    Sodeye, Akinbode [Department of Polymer Science and Engineering, University of Massachusetts; Huang, Tianzi [University of Tennessee, Knoxville (UTK); Gido, Samuel [University of Massachusetts, Amherst; Mays, Jimmy [ORNL

    2011-01-01T23:59:59.000Z

    In this study, block copolymer ionomers of the cesium salt (20 mol %) of fluorinated polyisoprene-blocksulfonated polystyrene were spin cast into membranes and annealed under an electric field ofw40 V/mm at 130 C for 24 h. The effect of this treatment was a 2.5 times increase in the ionic conductivity as measured by electrochemical impedance spectroscopy, under all humidity conditions measured. This can be attributed to the increased connectivity of the ionic domains of the block copolymers. This E-field alignment technique may thus find application in the fabrication of nanostructured polyelectrolytes with enhanced charge transport capacity.

  5. Novel Investigations on Kinetics and Polymerization Mechanism of Oxazolines Initiated by Iodine

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -opening polymerization of 2-methyl-2-oxazoline (MOx) using iodine initiating system was reported. Uncolored the polymerization of 2-oxazoline (Ox), 2-methyl-2-oxazoline (MOx) and 2-ethyl-2-oxazoline (EtOx

  6. Contrast-Medium-Enhanced Digital Mammography: Contrast vs. Iodine Concentration Phantom Calibration

    SciTech Connect (OSTI)

    Rosado-Mendez, I.; Brandan, M. E. [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, 04510 DF (Mexico); Villasenor, Y. [Instituto Nacional de Cancerologia (INCan), Av. San Fernando 22, Tlalpan 14080 DF (Mexico); Benitez-Bribiesca, L. [Centro Medico Nacional Siglo XXI, Av. Cuauhtemoc 330, Col. Doctores 06725 DF (Mexico)

    2008-08-11T23:59:59.000Z

    This work deals with the application of the contrast-medium-enhanced digital subtraction mammography technique in order to calibrate the contrast level in subtracted phantom images as function of iodine concentration to perform dynamic studies of the contrast-medium uptake in the breast. Previously optimized dual-energy temporal subtraction modalities were used (a) to determine radiological parameters for a dynamic clinical study composed of 1 mask+3 post-contrast images limiting the total mean glandular dose to 2.5 mGy, and (b) to perform a contrast vs iodine concentration calibration using a custom-made phantom. Calculated exposure values were applied using a commercial full-field digital mammography unit. Contrast in subtracted phantom images (one mask and one post-CM) is linear as function of iodine concentration, although the sensitivity (contrast per iodine concentration) decreases beyond 8 mg/mL. This calibration seems to apply only to thin and normal thickness breasts.

  7. Method for fluorination of actinide fluorides and oxyfluorides using O/sub 2/F/sub 2/

    DOE Patents [OSTI]

    Eller, P.G.; Malm, J.G.; Penneman, R.A.

    1984-08-01T23:59:59.000Z

    The present invention relates generally to methods of fluorination and more particularly to the use of O/sub 2/F/sub 2/ for the preparation of actinide hexafluorides, and for the extraction of deposited actinides and fluorides and oxyfluorides thereof from reaction vessels. The experiments set forth hereinabove demonstrate that the room temperature or below use of O/sub 2/F/sub 2/ will be highly beneficial for the preparation of pure actinide hexafluorides from their respective tetrafluorides without traces of HF being present as occurs using other fluorinating agents: and decontamination of equipment previously exposed to actinides: e.g., walls, feed lines, etc.

  8. Method for fluorination of actinide fluorides and oxyfluorides thereof using O[sub 2]F[sub 2

    DOE Patents [OSTI]

    Eller, P.G.; Malm, J.G.; Penneman, R.A.

    1988-11-08T23:59:59.000Z

    Method is described for fluorination of actinides and fluorides and oxyfluorides thereof using O[sub 2]F[sub 2] which generates actinide hexafluorides, and for removal of actinides and compounds thereof from surfaces upon which they appear as unwanted deposits. The fluorinating agent, O[sub 2]F[sub 2], has been observed to readily perform the above-described tasks at sufficiently low temperatures that there is virtually no damage to the containment vessels. Moreover, the resulting actinide hexafluorides are thereby not destroyed by high temperature reactions with the walls of the reaction vessel. Dioxygen difluoride is easily prepared, stored and transferred to the desired place of reaction.

  9. Iodine and NO sub x behavior in the dissolver off-gas and IODOX (Iodine Oxidation) systems in the Oak Ridge National Laboratory Integrated Equipment Test facility

    SciTech Connect (OSTI)

    Birdwell, J.F.

    1990-01-01T23:59:59.000Z

    This paper describes the most recent in a series of experiments evaluating the behavior of iodine and NO{sub x} in the Integrated Equipment Test (IET) Dissolver Off-Gas (DOG) System. This work was performed as part of a joint collaborative program between the US Department of Energy and the Power and Nuclear Fuel Development Corporation of Japan. The DOG system consists of two shell-and-tube heat exchangers in which water and nitric acid are removed from the dissolver off-gas by condensation, followed by a packed tower in which NO{sub x} is removed by absorption into a dilute nitric acid solution. The paper also describes the results of the operation of the Iodine Oxidation (IODOX) System. This system serves to remove iodine from the DOG system effluent by absorption into hyperazeotropic nitric acid. 7 refs., 11 figs., 10 tabs.

  10. Development of Efficient Flowsheet and Transient Modeling for Nuclear Heat Coupled Sulfur Iodine Cyclefor Hydrogen Production

    SciTech Connect (OSTI)

    Shripad T. Revankar; Nicholas R. Brown; Cheikhou Kane; Seungmin Oh

    2010-05-01T23:59:59.000Z

    The realization of the hydrogen as an energy carrier for future power sources relies on a practical method of producing hydrogen in large scale with no emission of green house gases. Hydrogen is an energy carrier which can be produced by a thermochemical water splitting process. The Sulfur-Iodine (SI) process is an example of a water splitting method using iodine and sulfur as recycling agents.

  11. NO2 Aging and Iodine Loading of Silver-Functionalized Aerogels

    SciTech Connect (OSTI)

    Patton, K K [ORNL; Bruffey, S H [ORNL; Walker, J F [ORNL; Jubin, R T [ORNL

    2014-07-31T23:59:59.000Z

    Off-gas treatment systems in used fuel reprocessing which use fixed-bed adsorbers are typically designed to operate for an extended period of time before replacement or regeneration of the adsorbent. During this time, the sorbent material will be exposed to the off-gas stream. Exposure could last for months, depending on the replacement cycle time. The gas stream will be at elevated temperature and will possibly contain a mixture of water vapor, NOx, nitric acid vapors, and a variety of other constituents in addition to the radionuclides of capture interest. A series of studies were undertaken to evaluate the effects of long-term exposure, or aging, on proposed iodine sorbent materials under increasingly harsh off-gas conditions. Previous studies have evaluated the effects of up to 6 months of aging under dry air and under humid air conditions on the iodine loading behavior of Ag0-functionalized aerogels. This study examines the effects of extended exposure (up to 6 months) to NO2 on the iodine loading capacity of Ag0- functionalized aerogels. Material aged for 1 and 2 months appeared to have a similar total loading capacity to fresh material. Over an aging period of 4 months, a loss of approximately 15% of the total iodine capacity was seen. The iodine capacity loss on silver-functionalized aerogels due to NO2 was smaller than the iodine capacity loss due to humid or dry air aging.

  12. THE FIRST FLUORINE ABUNDANCE DETERMINATIONS IN EXTRAGALACTIC ASYMPTOTIC GIANT BRANCH CARBON STARS

    SciTech Connect (OSTI)

    Abia, C.; Cristallo, S.; Dominguez, I. [Dpto. Fisica Teorica y del Cosmos, Universidad de Granada, 18071 Granada (Spain); Cunha, K.; Smith, V. V. [National Optical Astronomy Observatory, P.O. Box 26732, Tucson, AZ 85726 (United States); De Laverny, P.; Recio-Blanco, A. [University of Nice-Sophia Antipolis, CNRS (UMR 6202), Cassiopee, Observatoire de la Cote d'Azur, B.P. 4229, 06304 Nice Cedex 4 (France); Straniero, O., E-mail: cabia@ugr.es [INAF-Osservatorio di Collurania, 64100 Teramo (Italy)

    2011-08-10T23:59:59.000Z

    Fluorine ({sup 19}F) abundances (or upper limits) are derived in six extragalactic asymptotic giant branch (AGB) carbon stars from the HF(1-0) R9 line at 2.3358 {mu}m in high-resolution spectra. The stars belong to the Local Group galaxies, Large Magellanic Cloud, Small Magellanic Cloud, and Carina dwarf spheroidal, spanning more than a factor of 50 in metallicity. This is the first study to probe the behavior of F with metallicity in intrinsic extragalactic C-rich AGB stars. Fluorine could be measured only in four of the target stars, showing a wide range in F enhancements. Our F abundance measurements together with those recently derived in Galactic AGB carbon stars show a correlation with the observed carbon and s-element enhancements. The observed correlations, however, display a different dependence on the stellar metallicity with respect to theoretical predictions in low-mass, low-metallicity AGB models. We briefly discuss the possible reasons for this discrepancy. If our findings are confirmed in a larger number of metal-poor AGBs, the issue of F production in AGB stars will need to be revisited.

  13. Adsorbate-induced corrosion: anodic dissolution of palladium induced by chemisorbed iodine in halide-free acid solutions 

    E-Print Network [OSTI]

    Schimpf, Janemarie A

    1991-01-01T23:59:59.000Z

    ) Diagram of the electrochemical H-Cell apparatus. . . . . . . . . . 11 XPS spectrum for an electrochemically clean palladium foil. . 17 XPS spectrum of an iodine coated palladium electrode. . . . . . . . 18 Current potential curves for the clean (dotted...) and iodine coated 1mm palladium wire electrode. . . . . . . . . . . . 21 2 Current potential curves for the clean (dotted) electrode and four successive scans of iodine coated 1mm 2 palladium wire electrode. 23 Micromoles of Pd measured by ICP-OES vs...

  14. High precision analysis of all four stable isotopes of sulfur S) at nanomole levels using a laser fluorination

    E-Print Network [OSTI]

    Long, Bernard

    compositions. This methodology increases the spatial resolution of the laser ablation in situ analysis) at nanomole levels using a laser fluorination isotope-ratio-monitoring gas chromatography­mass spectrometry.V. All rights reserved. Keywords: S-33; S-36; Sulfur isotope; Laser; Isotope analysis; Continuous flow

  15. Fluorine Abundance Variations in Red Giants of the Globular Cluster M4 and Early-Cluster Chemical Pollution

    E-Print Network [OSTI]

    V. V. Smith; K. Cunha; I. I. Ivans; J. C. Lattanzio; K. H. Hinkle

    2005-06-30T23:59:59.000Z

    We present fluorine abundances in seven red-giant members of the globular cluster M4 (NGC 6121). These abundances were derived from the HF (1--0) R9 line at 2.3357 microns in high-resolution infrared spectra obtained with the Phoenix spectrograph on Gemini-South. Many abundances in the target stars have been studied previously, so that their overall abundance distributions are well-mapped. The abundance of fluorine is found to vary by more than a factor of 6, with the F-19 variations being correlated with the already established oxygen variations, and anti-correlated with the sodium and aluminium variations. In this paper we thus add fluorine to the list of elements known to vary in globular cluster stars, and this provides further evidence that H-burning is the root cause of the chemical inhomegeneities. The fact that F-19 is found to decrease in the M4 stars, as the signature of H-burning appears, indicates that the polluting stars must have masses greater than about 3.5 solar masses, as less massive stars than this should produce, not destroy, fluorine.

  16. Nuclear Hydrogen Initiative, Results of the Phase II Testing of Sulfur-Iodine Integrated Lab Scale Experiments

    SciTech Connect (OSTI)

    Benjamin Russ; G. Naranjo; R. Moore; W. Sweet; M. Hele; N. Pons

    2009-10-30T23:59:59.000Z

    International collaborative effort to construct a laboratory-scale Sulfur-Iodine process capable of producing 100-200 L/hr of hydrogen.

  17. Iodine-129 separation and determination by neutron activation analysis

    SciTech Connect (OSTI)

    Bate, L.C.; Stokely, J.R.

    1981-01-01T23:59:59.000Z

    A method is described for analysis of /sup 129/I in fission product mixtures originating from fuel reprocessing studies and low-level wastes. The method utilizes conventional iodine valence adjustment and solvent extraction techniques to chemically separate /sup 129/I from most fission products. The /sup 129/I is determined by neutron irradiation and measurement of the 12.4 h /sup 130/I produced by the neutron capture reaction. Special techniques were devised for neutron irradiation of /sup 129/I samples in the pneumatic tube irradiation facilities at the High Flux Isotope (HFIR) and Oak Ridge Research (ORR) Reactors. Chemically separated /sup 129/I is adsorbed on an anion exchange resin column made from an irradiation container. The loaded resin is then irradiated in either of the pneumatic facilities to produce /sup 130/I. Sensitivity of the analysis with the HFIR facility (flux: 5 x 10/sup 14/ n/cm/sup 2//sec) and a 100-second irradiation time is approximately 0.03 nanograms. Samples up to 250 ml in volume can be easily processed.

  18. Synthesis, structural and magnetic characterisation of the fully fluorinated compound 6H-BaFeO{sub 2}F

    SciTech Connect (OSTI)

    Clemens, Oliver, E-mail: oliverclemens@online.de [School of Chemistry, University of Birmingham, Birmingham B15 2TT (United Kingdom)] [School of Chemistry, University of Birmingham, Birmingham B15 2TT (United Kingdom); Wright, Adrian J.; Berry, Frank J. [School of Chemistry, University of Birmingham, Birmingham B15 2TT (United Kingdom)] [School of Chemistry, University of Birmingham, Birmingham B15 2TT (United Kingdom); Smith, Ronald I. [ISIS Facility, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX (United Kingdom)] [ISIS Facility, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX (United Kingdom); Slater, Peter R. [School of Chemistry, University of Birmingham, Birmingham B15 2TT (United Kingdom)] [School of Chemistry, University of Birmingham, Birmingham B15 2TT (United Kingdom)

    2013-02-15T23:59:59.000Z

    The compound 6H-BaFeO{sub 2}F (P6{sub 3}/mmc) was synthesised by the low temperature fluorination of 6H-BaFeO{sub 3-d} using polyvinylidenedifluoride (PVDF) as a fluorination agent. Structural characterisation by XRD and NPD suggests that the local positions of the oxygen and fluorine atoms vary with no evidence for ordering on the anion sites. This compound shows antiferromagnetic ordering at room temperature with antiparallel alignment of the magnetic moments along the c-axis. The use of PVDF also allows the possibility of tuning the fluorine content in materials of composition 6H-BaFeO{sub 3-d}F{sub y} to any value of 0fluorination using PVDF. Black-Right-Pointing-Pointer A structural investigation of the compounds BaFeO{sub 2}F is presented in detail. Black-Right-Pointing-Pointer This analysis suggests differences for the local coordination of O{sup 2-} and F{sup -} anions. Black-Right-Pointing-Pointer H-BaFeO{sub 2}F shows antiferromagnetic ordering at 300 K. Black-Right-Pointing-Pointer The magnetic moments align parallel to the a-axis.

  19. Accumulation and extraction of ultracold neutrons from a superfluid helium converter coated with fluorinated grease

    E-Print Network [OSTI]

    O. Zimmer; P. Schmidt-Wellenburg; M. Assmann; M. Fertl; J. Klenke; S. Mironov; H. -F. Wirth; B. van den Brandt

    2008-01-31T23:59:59.000Z

    We report experiments on the production of ultracold neutrons (UCN) in a converter of superfluid helium coated with fluorinated grease. We employed our technique of window-free extraction of accumulated UCN from the helium, in which they were produced by downscattering neutrons of a cold beam from the Munich research reactor. The time constant for UCN passage through the same extraction aperture as in a previous experiment was a factor two shorter, despite a lower mean velocity of the accumulated UCN in the present experiments. A time-of-flight measurement of the cold neutron spectrum incident on the converter allowed us to estimate the multi-phonon contribution to the UCN production. The UCN production rate inferred from two methods agrees with the theoretical expectation.

  20. Laboratory weathering and solubility relationships of fluorine and molybdenum in combusted oil shale

    SciTech Connect (OSTI)

    Essington, M.E.; Wills, R.A.; Brown, M.A.

    1991-01-01T23:59:59.000Z

    Proper management of large volumes of spent oil shale requires an understanding of the mineralogy and the disposal environment chemistry. Simulated laboratory weathering is one method to rapidly and inexpensively assess the long-term potential for spent oil shales to degrade the environment. The objectives of this study were to assess the solubility relationships of fluorine (F) and molybdenum (Mo) in Green River Formation spent oil shale, to examine the mineralogy and leachate chemistry of three combusted oil shales in a laboratory weathering environment using the humidity cell technique, and to examine the data from spent oil shale literature. Combusted oil shales from the Green River Formation and New Albany Shale were used in the examination of the leachate chemistry and mineralogy.

  1. FUNCTIONALIZED SILICA AEROGELS: ADVANCED MATERIALS TO CAPTURE AND IMMOBILIZE RADIOACTIVE IODINE

    SciTech Connect (OSTI)

    Matyas, Josef; Fryxell, Glen E.; Busche, Brad J.; Wallace, Krys; Fifield, Leonard S.

    2011-11-16T23:59:59.000Z

    To support the future expansion of nuclear energy, an effective method is needed to capture and safely store radiological iodine-129 released during reprocessing of spent nuclear fuel. Various materials have been investigated to capture and immobilize iodine. In most cases, however, the materials that are effective for capturing iodine cannot subsequently be sintered/densified to create a stable composite that could be a viable waste form. We have developed chemically modified, highly porous, silica aerogels that show sorption capacities higher than 440 mg of I2 per gram at 150 C. An iodine uptake test in dry air containing 4.2 ppm of iodine demonstrated no breakthrough after 3.5 h and indicated a decontamination factor in excess of 310. Preliminary densification tests showed that the I2-loaded aerogels retained more than 92 wt% of I2 after thermal sintering with pressure assistance at 1200 C for 30 min. These high capture and retention efficiencies for I2 can be further improved by optimizing the functionalization process and the chemistry as well as the sintering conditions.

  2. Cutting Performance of a Chemical Oxygen-Iodine Laser William P. Latham, James A. Rothenflue, and Charles A. Helms

    E-Print Network [OSTI]

    Carroll, David L.

    cutting and drilling. Chemical Oxygen- Iodine Laser (COIL) technology has received considerable interestCutting Performance of a Chemical Oxygen-Iodine Laser William P. Latham, James A. Rothenflue. Center for Research & Education in Optics & Laser (CREOL) University of Central Florith 4000 Central

  3. Project EARTH-11-RR2: Co-evolution of iodine antioxidant mechanism in marine algae and Earth-surface

    E-Print Network [OSTI]

    Henderson, Gideon

    Project EARTH-11-RR2: Co-evolution of iodine antioxidant mechanism in marine algae and Earth algae (yet they are lacking in green algae) ­ but the phylogenetic distribution of iodine accumulation haloperoxidases. The first appearance and important divergence of brown algae occurred within the last 200 myr

  4. TRENDS (Transport and Retention of Nuclides in Dominant Sequences): A code for modeling iodine behavior in containment during severe accidents

    SciTech Connect (OSTI)

    Weber, C.F.; Beahm, E.C.; Kress, T.S.; Daish, S.R.; Shockley, W.E.

    1989-01-01T23:59:59.000Z

    The ultimate aim of a description of iodine behavior in severe LWR accidents is a time-dependent accounting of iodine species released into containment and to the environment. Factors involved in the behavior of iodine can be conveniently divided into four general categories: (1) initial release into containment, (2) interaction of iodine species in containment not directly involving water pools, (3) interaction of iodine species in, or with, water pools, and (4) interaction with special systems such as ice condensers or gas treatment systems. To fill the large gaps in knowledge and to provide a means for assaying the iodine source term, this program has proceeded along two paths: (1) Experimental studies of the chemical behavior of iodine under containment conditions. (2) Development of TRENDS (Transport and Retention of Nuclides in Dominant Sequences), a computer code for modeling the behavior of iodine in containment and its release from containment. The main body of this report consists of a description of TRENDS. These two parts to the program are complementary in that models within TRENDS use data that were produced in the experimental program; therefore, these models are supported by experimental evidence that was obtained under conditions expected in severe accidents. 7 refs., 1 fig., 2 tabs.

  5. Comparative EPMA and -XRF methods for mapping micro-scale distribution of iodine in biocarbonates of the CallovianOxfordian

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Comparative EPMA and -XRF methods for mapping micro-scale distribution of iodine in biocarbonates spectrometry (IR), electron microprobe (EPMA), spatially resolved synchrotron-based X-ray fluorescence (-XRF recrystallized into diagenetic calcite and celestite. EPMA and -XRF data show bioaccumulation of iodine

  6. Improving Modeling of Iodine-129 Groundwater Contamination Plumes Using the System Assessment Capability

    SciTech Connect (OSTI)

    Dirkes, J.; Nichols, W.E.; Wurstner, S.K.

    2004-01-01T23:59:59.000Z

    Years of production of radioactive materials at the Hanford Site in southeastern Washington State has resulted in contamination of surface, subsurface, and surface water environments. Cleanup of the site has been aided by various tools, including computer software used to predict contaminant migration in the future and estimate subsequent impacts. The System Assessment Capability (SAC) is a total systems tool designed to simulate the movement of contaminants from all waste sites at Hanford through the vadose zone, the unconfined aquifer, and the Columbia River. Except for iodine-129, most of the contaminants modeled by SAC have acceptably matched field measurements. The two most likely reasons for the inconsistency between the measured field data and SAC modeled predictions are an underestimated inventory and an overestimated sorption value (Kd). Field data tend to be point measurements taken from near the surface of the unconfined aquifer. Thus, the depth of the iodine-129 contamination plume on the site is not well characterized. Geostatistical analyses of the measured data were conducted to determine the mass of iodine-129 for four assumed plume depths within the unconfined aquifer. Several simulations for two different Kd’s using the initial SAC inventory were run to determine the effect of an overestimated sorption value on SAC modeled predictions. The initial SAC inventory was then increased for the two different Kd’s to determine the influence of an underestimated inventory on SAC modeled predictions. It was found that evidence for both an underestimated inventory and for an overestimated sorption value for iodine-129 exist. These results suggest that the Kd for iodine-129 should be reevaluated and that a more complete inventory must be generated in order to more accurately model iodine-129 groundwater contamination plumes that match available field data.

  7. Technetium and Iodine Getters to Improve Cast Stone Performance

    SciTech Connect (OSTI)

    Qafoku, Nikolla; Neeway, James J.; Lawter, Amanda R.; Levitskaia, Tatiana G.; Serne, R. Jeffrey; Westsik, Joseph H.; Snyder, Michelle MV

    2014-07-01T23:59:59.000Z

    To determine the effectiveness of the various getter materials prior to their solidification in Cast Stone, a series of batch sorption experiments was performed at Pacific Northwest National Laboratory. To quantify the effectiveness of the removal of Tc(VII) and I(I) from solution by getters, the distribution coefficient, Kd (mL/g), was calculated. Testing involved placing getter material in contact with spiked waste solutions at a 1:100 solid-to-solution ratio for periods up to 45 days with periodic solution sampling. One Tc getter was also tested at a 1:10 solid-to-solution ratio. Two different solution media, 18.2 M? deionized water (DI H2O) and a 7.8 M Na LAW simulant, were used in the batch sorption tests. Each test was conducted at room temperature in an anoxic chamber containing N2 with a small amount of H2 (0.7%) to maintain anoxic conditions. Each getter-solution combination was run in duplicate. Three Tc- and I-doping concentrations were used separately in aliquots of both the 18.2 M? DI H2O and a 7.8 M Na LAW waste simulant. The 1× concentration was developed based on Hanford Tank Waste Operations Simulator (HTWOS) model runs to support the River Protection Project System Plan Revision 6. The other two concentrations were 5× and 10× of the HTWOS values. The Tc and I tests were run separately (i.e., the solutions did not contain both solutes). Sampling of the solid-solution mixtures occurred nominally after 0.2, 1, 3, 6, 9, 12, 15 days and ~35 to 45 days. Seven getter materials were tested for Tc and five materials were tested for I. The seven Tc getters were blast furnace slag 1 (BFS1) (northwest source), BFS2 (southeast source), Sn(II)-treated apatite, Sn(II) chloride, nano tin phosphate, KMS (a potassium-metal-sulfide), and tin hydroxapatite. The five iodine getters were layered bismuth hydroxide (LBH), argentite mineral, synthetic argentite, silver-treated carbon, and silver-treated zeolite. The Tc Kd values measured from experiments conducted using the 7.8 M Na LAW simulant (the simulant selected to represent LAW) for the first 15 days for four Tc getters (BFS1, BFS2, Sn(II)-treated apatite, and Sn(II) chloride) show no, to a very small, capacity to remove Tc from the LAW simulant. For the Tc-getter experiments in the 7.8 M LAW simulant, the majority of the effluent samples show very small drops in Tc concentrations for the 35-day compared to the 15-day samplings. However, the Tc concentration in the simulant blanks also dropped slightly during this period, so the effect of the getter contacting LAW simulant at 35 days compared to 15 days is minimal; except that the BFS1 1:10 test shows a slow but steady decrease in Tc concentration in the LAW simulant supernatant from the beginning to the 35 day contact at which point about 20% of the original Tc has been removed from solution. Lastly, the KMS getter gives the highest Kd value for Tc at 35 days where Kd values have increased to 104 mL/g. When considering the different I getters reacting with the 7.8 M LAW simulant, two getters are much more effective than the others: Ag zeolite and Syn Arg. The other getters have calculated iodide distribution coefficients that show very limited effectiveness in the caustic conditions created by the LAW simulant. These are preliminary results that will need more detailed analyses including both pre- and post-batch sorption getter solid-phase characterization using state-of-the-art instrumentation such as synchrotron X ray absorption spectroscopy, which can delineate the oxidation state of the Tc and likely iodine species as well as some of the getters key major components, sulfur and iron in the BFS, and tin and sulfur in the tin-bearing and sulfur-bearing getters. This report also describes future experimental studies to be performed to better elucidate the mechanisms controlling the Tc and I sequestration processes in the various getters and leach tests of getter-bearing Cast Stone monoliths.

  8. Sorption and transport of iodine species in sediments from the Savannah River and Hanford Sites

    E-Print Network [OSTI]

    Hu, Qinhong "Max"

    States b Advanced Analytical Center for Environmental Sciences, Savannah River Ecology LaboratorySorption and transport of iodine species in sediments from the Savannah River and Hanford Sites Division, Lawrence Livermore National Laboratory, 7000 East Avenue, MS L-231, Livermore, CA 94550, United

  9. Deciphering the measured ratios of Iodine-131 to Cesium-137 at the Fukushima reactors

    E-Print Network [OSTI]

    Matsui, T

    2011-01-01T23:59:59.000Z

    We calculate the relative abundance of the radioactive isotopes Iodine-131 and Cesium-137 produced by nuclear fission in reactors and compare it with data taken at the troubled Fukushima Dai-ichi nuclear power plant. The ratio of radioactivities of these two isotopes can be used to obtain information about when the nuclear reactions terminated.

  10. Singlet oxygen generation using iodinated squaraine and squaraine-rotaxane dyesw

    E-Print Network [OSTI]

    Smith, Bradley D.

    Singlet oxygen generation using iodinated squaraine and squaraine-rotaxane dyesw Easwaran Arunkumar-rotaxanes to generate singlet oxygen for potential application in photodynamic therapy (PDT). Specifically, we compare-to-face orientations in the solid state. Singlet oxygen generation efficiency was measured by trapping with 1

  11. Demonstration of an iodine laser pumped by an air-helium electric discharge

    E-Print Network [OSTI]

    Carroll, David L.

    issues with this chemical singlet oxygen generator (SOG) motivated many investigations-He-NO gas mixture. Active oxygen and nitrogen species were observed downstream of the discharge regionW in a supersonic flow cavity. Keywords: electric oxygen iodine laser, electric discharge, singlet oxygen, active

  12. Deciphering the measured ratios of Iodine-131 to Cesium-137 at the Fukushima reactors

    E-Print Network [OSTI]

    T. Matsui

    2011-12-13T23:59:59.000Z

    We calculate the relative abundance of the radioactive isotopes Iodine-131 and Cesium-137 produced by nuclear fission in reactors and compare it with data taken at the troubled Fukushima Dai-ichi nuclear power plant. The ratio of radioactivities of these two isotopes can be used to obtain information about when the nuclear reactions terminated.

  13. Iodine as a tracer of organic material: 129 I results from gas hydrate

    E-Print Network [OSTI]

    Fehn, Udo

    Iodine as a tracer of organic material: 129 I results from gas hydrate systems and fore arc fluids of this system, investigations of gas hydrates from the Peru Margin (ODP 201, Site 1230) and of fluids collected for these fluids. The results are in good agreement with earlier investigations of gas hydrate systems at Blake

  14. Features of adsorbed radioactive chemical elements and their isotopes distribution in iodine air filters AU-1500 at nuclear power plants

    E-Print Network [OSTI]

    I. M. Neklyudov; A. N. Dovbnya; N. P. Dikiy; O. P. Ledenyov; Yu. V. Lyashko

    2013-06-21T23:59:59.000Z

    The main aim of research is to investigate the physical features of spatial distribution of the adsorbed radioactive chemical elements and their isotopes in the granular filtering medium in the iodine air filters of the type of AU1500 in the forced exhaust ventilation systems at the nuclear power plant. The gamma activation analysis method is applied to accurately characterize the distribution of the adsorbed radioactive chemical elements and their isotopes in the granular filtering medium in the AU1500 iodine air filter after its long term operation at the nuclear power plant. The typical spectrum of the detected chemical elements and their isotopes in the AU1500 iodine air filter, which was exposed to the bremsstrahlung gamma quantum irradiation, produced by the accelerating electrons in the tantalum target, are obtained. The spatial distributions of the detected chemical element 127I and some other chemical elements and their isotopes in the layer of absorber, which was made of the cylindrical coal granules of the type of SKT3, in the AU1500 iodine air filter are also researched. The possible influences by the standing acoustic wave of air pressure in the iodine air filter on the spatial distribution of the chemical elements and their isotopes in the iodine air filter are discussed. The comprehensive analysis of obtained research results on the distribution of the adsorbed chemical elements and their isotopes in the absorber of iodine air filter is performed.

  15. Conditioning matrices from high level waste resulting from pyrochemical processing in fluorine salt

    SciTech Connect (OSTI)

    Grandjean, Agnes; Advocat, Thierry; Bousquet, Nicolas [SCDV - Service de Confinement des Dechets et Vitrification - Laboratoire d'Etudes de Base sur les Verres, CEA Valrho, Centre de Marcoule, 30207 Bagnols sur Ceze (France); Jegou, Christophe [SECM - Service d'Etude du Confinement et Materiaux - Laboratoire des Materiaux et Procedes Actifs - CEA Valrho, Centre de Marcoule, 30207 Bagnols sur Ceze (France)

    2007-07-01T23:59:59.000Z

    Separating the actinides from the fission products through reductive extraction by aluminium in a LiF/AlF{sub 3} medium is a process investigated for pyrometallurgical reprocessing of spent fuel. The process involves separation by reductive salt-metal extraction. After dissolving the fuel or the transmutation target in a salt bath, the noble metal fission products are first extracted by contacting them with a slightly reducing metal. After extracting the metal fission products, then the actinides are selectively separated from the remaining fission products. In this hypothesis, all the unrecoverable fission products would be conditioned as fluorides. Therefore, this process will generate first a metallic waste containing the 'reducible' fission products (Pd, Mo, Ru, Rh, Tc, etc.) and a fluorine waste containing alkali-metal, alkaline-earth and rare earth fission products. Immobilization of these wastes in classical borosilicate glasses is not feasible due to the very low solubility of noble metals, and of fluoride in these hosts. Alternative candidates have therefore been developed including silicate glass/ceramic system for fluoride fission products and metallic ones for noble metal fission products. These waste-forms were evaluated for their confinement properties like homogeneity, waste loading, volatility during the elaboration process, chemical durability, etc. using appropriate techniques. (authors)

  16. Study of the presence of fluorine in the recycled fractions during carbothermal treatment of EAF dust

    SciTech Connect (OSTI)

    Menad, N.; Ayala, J.N.; Garcia-Carcedo, Fernando; Ruiz-Ayucar, E.; Hernandez, A

    2003-07-01T23:59:59.000Z

    Carbothermal treatment tests of electric arc furnace dusts (EAFD) using the Waelz kiln process were carried out in pilot-scale for the production of zinc oxide. The association of halides in the EAFD, and the recycled products, such as zinc oxide fumes and high-grade iron contents fractions were examined by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis. XRD reveals the presence of chlorine and fluorine in the dusts in the form of KCl, NaCl and CaF{sub 2}. An ultra-pure fraction of zinc was obtained after the Double Leaching Waelz Oxide (DLWO) process was performed on the zinc oxide fumes. The halide contents were reduced to approximately 100 ppm Cl and 700 ppm F. The rest of these elements are in the form of CaF{sub 2}. About 65% F is volatilised as lead and zinc fluorides, 15% is expected in the magnetic fractions and 20% in non-magnetic fractions as CaF{sub 2} and MnF{sub 2}, respectively.

  17. Polymer electrolyte membranes from fluorinated polyisoprene-block-sulfonated polystyrene: Membrane structure and transport properties

    SciTech Connect (OSTI)

    Sodeye, Akinbode [Department of Polymer Science and Engineering, University of Massachusetts; Huang, Tianzi [University of Tennessee, Knoxville (UTK); Gido, Samuel [University of Massachusetts, Amherst; Mays, Jimmy [ORNL

    2011-01-01T23:59:59.000Z

    With a view to optimizing morphology and ultimately properties, membranes have been cast from relatively inexpensive block copolymer ionomers of fluorinated polyisoprene-block-sulfonated polystyrene (FISS) with various sulfonation levels, in both the acid form and the cesium neutralized form. The morphology of these membranes was characterized by transmission electron microscopy and ultra-small angle X-ray scattering, as well as water uptake, proton conductivity and methanol permeability within the temperature range from 20 to 60 C. Random phase separated morphologies were obtained for all samples except the cesium sample with 50 mol% sulfonation. The transport properties increased with increasing degree of sulfonation and temperature for all samples. The acid form samples absorbed more water than the cesium samples with a maximum swelling of 595% recorded at 60 C for the acid sample having 50 mol% sulfonation. Methanol permeability for the latter sample was more than an order of magnitude less than for Nafion 112 but so was the proton conductivity within the plane of the membrane at 20 C. Across the plane of the membrane this sample had half the conductivity of Nafion 112 at 60 C.

  18. Fluorine-Containing ABC Linear Triblock Terpolymers: Synthesis and Self-assembly in Solution

    SciTech Connect (OSTI)

    He, Lihong [ORNL; Hinestrosa Salazar, Juan P [ORNL; Pickel, Joseph M [ORNL; Kilbey, II, S Michael [ORNL; Mays, Jimmy [ORNL; Zhang, Shanju [Georgia Institute of Technology; Bucknall, David G. [Georgia Institute of Technology; Hong, Kunlun [ORNL

    2011-01-01T23:59:59.000Z

    In this paper a fluorine-containing monomer, 2-fluroroethyl methacrylate (2FEMA) was used to synthesize the linear triblock terpolymer poly(n-butyl methacrylate)-poly(methyl methacrylate)-poly(2-fluoroethyl methacrylate) (PnBMA-PMMA-P2FEMA). A kinetic study of the homopolymerization of 2FEMA by reversible addition-fragmentation chain transfer (RAFT) polymerization showed that it demonstrates living character and produces well defined polymers with reasonably narrow polydispersities (~1.30). Triblock terpolymers were prepared sequentially using a purified Macro-CTA at 70 oC, resulting in final terpolymers with high Dp for each block (>150) and with polydispersities between 1.6 and 2.1. The structure and molecular weights of the resultant PnBMA-PMMA-P2FEMA triblock terpolymers were characterized via 1H NMR, 19F NMR, and gel permeation chromatography (GPC). Self-assembly of these polymers was carried out in a selective solvent and the micellar aggregates (MAs) thereby formed were analyzed using scanning electron microscopy (SEM) and dynamic light scattering (DLS). It was confirmed from SEM that these copolymers could directly self-organize into large compound micelles in tetrahydrofuran/methanol with different diameters, depending on polymer composition.

  19. Determination of iodine in organic compounds using low-temperature ammoniacal plasma of high-frequency discharge

    SciTech Connect (OSTI)

    Volodina, M.A.; Kutseva, N.K.

    1986-09-01T23:59:59.000Z

    This paper presents a method for the determination of iodine in organic compounds, based on the use of a low-temperature ammonial plasma of an electrodeless high frequency discharge. The method was tested on a large number of compounds, and is distinguished by simplicity of operation, rapidity, accuracy and applicability for simultaneous determination of iodine and palladium. The results of the simultaneous determination of iodine and palladium in organic compounds are shown. The relative standard deviation does not exceed 0.011. The duration of each determination is 15-20 min.

  20. Impact of Pretreatment and Aging on the Iodine Capture Performance of Silver-Exchanged Mordenite - 12314

    SciTech Connect (OSTI)

    Jubin, R.T.; Ramey, D.W.; Spencer, B.B.; Anderson, K.K.; Robinson, S.M. [Oak Ridge National Laboratory (United States)

    2012-07-01T23:59:59.000Z

    Volatile gas emissions from a nuclear fuel recycle facility in the United States are governed by several key regulations, including 10 CFR 20, 40 CFR 61, and 40 CFR 190. Under 40 CFR 190, the total quantity of iodine that may be released to the environment from the entire fuel cycle is limited to 5 millicuries of I-129 per gigawatt-year of electrical energy produced by the fuel cycle. With a reasonable engineering margin, an iodine decontamination factor (DF) of approximately 1000 will be required for the complete fuel cycle. Off-gas treatment in a fuel reprocessing plant must address several gas streams containing iodine, among a number of volatile radionuclides. Past research and developmental activities identified silver-exchanged mordenite (AgZ) as a very promising sorbent based on its acid resistance, relatively high iodine and methyl iodide capacity, and high achievable DF. Recent studies at ORNL have focused on the impacts of long-term exposure to simulated off-gas streams (aging) and pretreatment on the iodine adsorption performance of hydrogen-reduced silver-exchanged mordenite (Ag{sup 0}Z). Experiments were conducted to determine the effects of long-term exposure to both dry and moist air on the iodine sorption capacity of Ag{sup 0}Z. The data indicates that aging reduces the capacity of Ag{sup 0}Z, which must be accounted for to prevent degradation of DF. Because of its high acid resistance, a AgZ sorbent has been selected specifically for application in treating off-gas streams containing iodine. While extensive tests have been conducted in the United States on a form of this sorbent, the specific material previously tested is no longer commercially available and similar materials are currently being evaluated. As part of this evaluation, tests were conducted to determine the iodine sorption properties of this replacement media and the effects of long-term (up to 6 months) exposure to simulated off-gas streams. The ultimate goal is to develop an understanding of the fundamental phenomena that controls aging for this material and other zeolites that could be considered for use in off-gas treatment in the future. The trends in the study results indicate that the amount of elemental silver observed by XRD increases from 0.3 wt% in vendor-supplied AgZ to approximately 5 wt% by reducing the material with hydrogen. The study also concluded that aging decreases the quantity of elemental silver in the material. After 2 months of aging, the Ag{sup 0} content of an experimental sample was reduced from 5 wt% to about 1.3 wt%. The form into which the elemental silver is converted during aging was not determined. Experimental tests have been initiated to study how aging of Ag{sup 0}Z impacts iodine loading on the zeolite. Loading tests with un-aged Ag{sup 0}Z resulted in an 81% silver utilization. The loading capacity of iodine on Ag{sup 0}Z was reduced with aging in dry air. Material aged for 6 months in dry air had a 40% reduction in iodine loading capacity. Under moist-air aging conditions, a significant decrease in the rate and total loading (?45% of theoretical) of iodine uptake can be observed beginning with the shortest aging period (i.e., after 1 month) when compared with the loading curve using Ag{sup 0}Z with no aging. Increasing exposure time to the humid air used to age the Ag{sup 0}Z beyond 1 month resulted in a slight additional reduction in capacity to about 35% of theoretical at 2 months. Virtually identical capacity was observed with 4 months of aging. Compared to the non-aged material, the 1 month dry-air aged Ag{sup 0}Z shows about a 35% reduction (approximate) in iodine loading capacity and the 6 month dry-air aged Ag{sup 0}Z shows about a 50% reduction. These studies generated several questions that will be addressed in future tests. They include the following: Is there indeed degradation over time (in storage) in the iodine adsorption performance of Ag{sup 0}Z? Once reduced, how should the Ag{sup 0}Z be stored- under a hydrogen atmosphere, an inert atmosphere, a desiccant, or some other method or c

  1. A comprehensive program for countermeasures against potentially hazardous objects (PHOs)

    SciTech Connect (OSTI)

    Huebner, Walter [Los Alamos National Laboratory; Giguere, P T [Los Alamos National Laboratory; Bradley, P [Los Alamos National Laboratory; Guzik, J A [Los Alamos National Laboratory; Plesko, C [Los Alamos National Laboratory; Wohletz, K [Los Alamos National Laboratory; Johnson, L N [SMD; Boice, D C [SWR; Chocron, S [SWRI; Ghosh, A [SWRI; Goldstein, R [SWRI; Mukerherjee, J [SWRI; Patrick, W [SWRI; Walker, J D [SWRI

    2008-01-01T23:59:59.000Z

    At the hundredth anniversary of the Tunguska event in Siberia it is appropriate to discuss measures to avoid such occurrences in the future. Recent discussions about detecting, tracking, cataloguing, and characterizing near-Earth objects (NEOs) center on objects larger than about 140 m in size. However, objects smaller than 100 m are more frequent and can cause significant regional destruction of civil infrastructures and population centers. The cosmic object responsible for the Tunguska event provides a graphic example: although it is thought to have been only about 50 to 60 m in size, it devastated an area of about 2000 km{sup 2}. Ongoing surveys aimed at early detection of a potentially hazardous object (PHO: asteroid or comet nucleus that approaches the Earth's orbit within 0.05 AU) are only a first step toward applying countermeasures to prevent an impact on Earth. Because 'early' may mean only a few weeks or days in the case of a Tunguska-sized object or a long-period comet, deflecting the object by changing its orbit is beyond the means of current technology, and destruction and dispersal of its fragments may be the only reasonable solution. Highly capable countermeasures - always at the ready - are essential to defending against an object with such short warning time, and therefore short reaction time between discovery and impending impact. We present an outline for a comprehensive plan for countermeasures that includes smaller (Tunguska-sized) objects and long-period comets, focuses on short warning times, uses non-nuclear methods (e.g., hyper-velocity impactor devices and conventional explosives) whenever possible, uses nuclear munitions only when needed, and launches from the ground. The plan calls for international collaboration for action against a truly global threat.

  2. The development of autocatalytic structural materials for use in the sulfur-iodine process for the production of hydrogen

    E-Print Network [OSTI]

    Miu, Kevin (Kevin K.)

    2006-01-01T23:59:59.000Z

    The Sulfur-Iodine Cycle for the thermochemical production of hydrogen offers many benefits to traditional methods of hydrogen production. As opposed to steam methane reforming - the most prevalent method of hydrogen ...

  3. Real-time crystallization in fluorinated parylene probed by conductivity spectra

    SciTech Connect (OSTI)

    Khazaka, R., E-mail: rabih.khazaka@laplace.univ-tlse.fr; Diaham, S. [Université de Toulouse, UPS, INPT, Laboratoire LAPLACE, 118 route de Narbonne, F-31062 Toulouse (France); Locatelli, M. L. [Université de Toulouse, UPS, INPT, Laboratoire LAPLACE, 118 route de Narbonne, F-31062 Toulouse (France); CNRS, LAPLACE, F-31062 Toulouse (France); Tenailleau, C. [Université de Toulouse, UPS, Laboratoire CIRIMAT/LCMIE, 118 route de Narbonne - Bât. 2R1, F-31062 Toulouse cedex 9 (France); Kumar, R. [Speciality Coating Systems, Inc. (SCS), Cookson Electronics, 7645 Woodland Drive, Indianapolis, Indiana 46278 (United States)

    2014-03-17T23:59:59.000Z

    Dielectric relaxation spectroscopy experiments were performed at high temperature on fluorinated parylene films during the occurrence of the isothermal crystalline phase transition. For this polymer, since the difference between the glass transition temperature (T{sub g}) and the phase transition temperature (T{sub c}) is very strong (T{sub c}???4T{sub g}), segmental and dipolar relaxation usually used to probe the crystallization are not shown in the experiment frequency window (10{sup ?1} to 10{sup 6}?Hz) during the crystallization. The charge diffusion becomes the only electrical marker that allows probing the phase transition. During the transition phase, a continuous decrease of about two orders of magnitude is observed in the conductivity values below an offset frequency (f{sub c}) with a tendency to stabilization after 600?min. Below the offset frequency, the decrease of the normalized conductivity to the initial value as function of time is frequency independent. The same behavior is also observed for the f{sub c} values that decrease from 160?Hz to about 20?Hz. Above the offset frequency, the electronic hopping mechanism is also affected by the phase transition and the power law exponent (n) of the AC conductivity shows a variation from 0.7 to 0.95 during the first 600?min that tend to stabilize thereafter. Accordingly, three parameters (n, f{sub c}, and AC conductivity values for frequencies below f{sub c}) extracted from the AC conductivity spectra in different frequency windows seem suitable to probe the crystalline phase transition.

  4. Positron annihilation studies of fluorine-vacancy complexes in Si and SiGe

    SciTech Connect (OSTI)

    Edwardson, C. J.; Coleman, P. G. [Department of Physics, University of Bath, Bath BA2 7AY (United Kingdom); El Mubarek, H. A. W.; Gandy, A. S. [School of Electrical and Electronic Engineering, University of Manchester, Manchester, M13 9PL (United Kingdom)

    2012-04-01T23:59:59.000Z

    The formation of fluorine-vacancy (FV) complexes in strained Si-SiGe-Si multilayer structures and relaxed SiGe layers of varying Ge content has been investigated using variable-energy positron annihilation spectroscopy, including Doppler-broadened spectra ratio curves. It has been found that in all sample types there are two distinct regions defined only by the damage created by the implanted F ions. The first, shallower region (from the surface to a depth of {approx}200 nm) was found to contain a mixture of undecorated vacancies and FV complexes; there is no correlation between the vacancy or F concentration in this region and the Ge content. The multi-layer samples may also have O contamination that is not present in the relaxed samples. The second region (at depths {approx}200-440 nm) contains primarily FV complexes in all samples. In the multi-layer samples secondary ion mass spectrometry (SIMS) results show peaks of F accumulating in, or at the interfaces of, each SiGe multi-layer; the FV complexes, however, are distributed over depths similar to those in the relaxed samples, with some localization at the SiGe layer located within the second region. The positron response is primarily to FV complexes formed by the F implant in all samples. The F: FV ratios are approximately 3-7: 1 in the relaxed samples. Positrons appear to be relatively insensitive to the largest of the F SIMS peaks which lies beyond the second region. This is probably because the F has filled all the open volume at the SiGe layer, leaving no positron trapping sites.

  5. Effect of fluorine, nitrogen, and carbon impurities on the electronic and magnetic properties of WO{sub 3}

    SciTech Connect (OSTI)

    Shein, I. R.; Ivanovskii, A. L. [Russian Academy of Sciences, Institute of Solid State Chemistry (Russian Federation)

    2013-06-15T23:59:59.000Z

    Within electron density functional theory with the use of the Vienna ab-initio simulation package (VASP), the effect of the sp substitutional impurities of fluorine (n-type dopant), nitrogen, and carbon (p-type dopants) on the electronic and magnetic properties of tungsten trioxide WO{sub 3} is studied. It is established that these impurities induce the transformation of tungsten trioxide (nonmagnetic semiconductor) into nonmagnetic metal (WO{sub 3}:F), magnetic semimetal (WO{sub 3}:N), or magnetic metal (WO{sub 3}:C) states.

  6. Aqueous Dissolution of Silver Iodide and Associated Iodine Release Under Reducing Conditions with Sulfide

    SciTech Connect (OSTI)

    Yaohiro Inagaki; Toshitaka Imamura; Kazuya Idemitsu; Tatsumi Arima [Kyushu University, Fukuoka, 819-0395 (Japan); Osamu Kato [Kobe Steel Inc., Kobe, 657-0845 (Japan); Hidekazu Asano; Tsutomu Nishimura [RWMC, Tokyo, 105-0001 (Japan)

    2007-07-01T23:59:59.000Z

    Aqueous dissolution tests of silver iodide (AgI) were performed in Na{sub 2}S solutions in order to evaluate, empirically, dissolution of AgI to release iodine under reducing conditions with sulfide. The results indicated that AgI dissolves to release iodine being controlled by mainly precipitation of Ag{sub 2}S. However, the dissolution of AgI can be depressed to proceed, and the thermodynamic equilibrium cannot be attained easily. Solid phase analysis for the reacted AgI suggested that a thin layer of solid silver forming at AgI surface may evolve to be protective against transportation of reactant species, which can lead to the depression in the dissolution of AgI. (authors)

  7. Expanded Analysis of Hot Isostatic Pressed Iodine-Loaded Silver-Exchanged Mordenite

    SciTech Connect (OSTI)

    Jubin, R. T. [ORNL; Bruffey, S. H. [ORNL; Patton, K. K. [ORNL

    2014-09-30T23:59:59.000Z

    Reduced silver-exchanged mordenite (Ag0Z) is being evaluated as a potential material to control the release of radioactive iodine that is released during the reprocessing of used nuclear fuel into the plant off-gas streams. The purpose of this study was to determine if hot pressing could directly convert this iodine loaded sorbent into a waste form suitable for long-term disposition. The minimal pretreatment required for production of pressed pellets makes hot pressing a technically and economically desirable process. Initial scoping studies utilized hot uniaxial pressing (HUPing) to prepare samples of non-iodine-loaded reduced silver exchanged mordenite (Ag0Z). The resulting samples were very fragile due to the low pressure (~ 28 MPa) used. It was recommended that hot isostatic pressing (HIPing), performed at higher temperatures and pressures, be investigated. HIPing was carried out in two phases, with a third and final phase currently underway. Phase I evaluated the effects of pressure and temperature conditions on the manufacture of a pressed sample. The base material was an engineered form of silver zeolite. Six samples of Ag0Z and two samples of I-Ag0Z were pressed. It was found that HIPing produced a pressed pellet of high density. Analysis of each pressed pellet by scanning electron microscopy-energy dispersive spectrophotometry (SEM-EDS) and X-ray diffraction (XRD) demonstrated that under the conditions used for pressing, the majority of the material transforms into an amorphous structure. The only crystalline phase observed in the pressed Ag0Z material was SiO2. For the samples loaded with iodine (I-Ag0Z) iodine was present as AgI clusters at low temperatures, and transformed into AgIO4 at high temperatures. Surface mapping and EDS demonstrate segregation between silver iodide phases and silicon dioxide phases. Based on the results of the Phase I study, an expanded test matrix was developed to examine the effects of multiple source materials, compositional variations, and an expanded temperature range. Each sample was analyzed with the approach used in Phase I. In all cases, there is nothing in the SEM or XRD analyses that indicates creation of any AgI-containing silicon phase, with the samples being found to be largely amorphous. Phase III of this study has been initiated and is the final phase of scoping tests. It will expand upon the test matrix completed in Phase II and will examine the durability of the pressed pellets through product consistency testing (PCT) studies. Transformation of the component material into a well-characterized iodine-containing mineral phase would be desirable. This would limit the additional experimental testing and modeling required to determine the long-term stability of the pressed pellet, as much of that information has already been learned for several common iodine-containing minerals. However, this is not an absolute requirement, especially if pellets produced by hot isostatic pressing can be demonstrated through initial PCT studies to retain iodine well despite their amorphous composition.

  8. Sulfur Iodine Process Summary for the Hydrogen Technology Down-Selection

    SciTech Connect (OSTI)

    Benjamin Russ

    2009-05-01T23:59:59.000Z

    This report summarizes the sulfur-iodine (SI) thermochemical water splitting process for the purpose of supporting the process for evaluating and recommending a hydrogen production technology to deploy with the Next Generation Nuclear Plant (NGNP). This package provides the baseline process description as well as a comparison with the process as it was implemented in the Integrated Lab Scale (ILS) experiment conducted at General Atomics from 2006-2009.

  9. Physical features of accumulation and distribution processes of small disperse coal dust precipitations and absorbed radioactive chemical elements in iodine air filter at nuclear power plant

    E-Print Network [OSTI]

    Ledenyov, Oleg P; Poltinin, P Ya; Fedorova, L I

    2012-01-01T23:59:59.000Z

    The physical features of absorption process of radioactive chemical elements and their isotopes in the iodine air filters of the type of AU-1500 at the nuclear power plants are researched. It is shown that the non-homogenous spatial distribution of absorbed radioactive chemical elements and their isotopes in the iodine air filter, probed by the gamma-activation analysis method, is well correlated with the spatial distribution of small disperse coal dust precipitations in the iodine air filter. This circumstance points out to an important role by the small disperse coal dust fractions of absorber in the absorption process of radioactive chemical elements and their isotopes in the iodine air filter. The physical origins of characteristic interaction between the radioactive chemical elements and the accumulated small disperse coal dust precipitations in an iodine air filter are considered. The analysis of influence by the researched physical processes on the technical characteristics and functionality of iodine ...

  10. Determine Minimum Silver Flake Addition to GCM for Iodine Loaded AgZ

    SciTech Connect (OSTI)

    Garino, Terry J.; Nenoff, Tina M.; Rodriguez, Mark A.

    2014-04-01T23:59:59.000Z

    The minimum amount of silver flake required to prevent loss of I{sub 2} during sintering in air for a SNL Glass Composite Material (GCM) Waste Form containing AgI-MOR (ORNL, 8.7 wt%) was determined to be 1.1 wt% Ag. The final GCM composition prior to sintering was 20 wt% AgI-MOR, 1.1 wt% Ag, and 80 wt% Bi-Si oxide glass. The amount of silver flake needed to suppress iodine loss was determined using thermo gravimetric analysis with mass spectroscopic off-gas analysis. These studies found that the ratio of silver to AgI-MOR required is lower in the presence of the glass than without it. Therefore an additional benefit of the GCM is that it serves to inhibit some iodine loss during processing. Alternatively, heating the AgI-MOR in inert atmosphere instead of air allowed for densified GCM formation without I{sub 2} loss, and no necessity for the addition of Ag. The cause of this behavior is found to be related to the oxidation of the metallic Ag to Ag{sup +} when heated to above ~300{degrees}C in air. Heating rate, iodine loading levels and atmosphere are the important variables that determine AgI migration and results suggest that AgI may be completely incorporated into the mordenite structure by the 550{degrees}C sintering temperature.

  11. Fluorinated Phosphazene Co-solvents for Improved Thermal and Safety Performance in Lithium-Ion Battery Electrolytes

    SciTech Connect (OSTI)

    Harry W. Rollins; Mason K. Harrup; Eric J. Dufek; David K. Jamison; Sergiy V. Sazhin; Kevin L. Gering; Dayna L. Daubaras

    2014-10-01T23:59:59.000Z

    The safety of lithium-ion batteries is coming under increased scrutiny as they are being adopted for large format applications especially in the vehicle transportation industry and for grid-scale energy storage. The primary short-comings of lithium-ion batteries are the flammability of the liquid electrolyte and sensitivity to high voltage and elevated temperatures. We have synthesized a series of non-flammable fluorinated phosphazene liquids and blended them with conventional carbonate solvents. While the use of these phosphazenes as standalone electrolytes is highly desirable, they simply do not satisfy all of the many requirements that must be met such as high LiPF6 solubility and low viscosity, thus we have used them as additives and co-solvents in blends with typical carbonates. The physical and electrochemical properties of the electrolyte blends were characterized, and then the blends were used to build 2032-type coin cells which were evaluated at constant current cycling rates from C/10 to C/1. We have evaluated the performance of the electrolytes by determining the conductivity, viscosity, flash point, vapor pressure, thermal stability, electrochemical window, cell cycling data, and the ability to form solid electrolyte interphase (SEI) films. This paper presents our results on a series of chemically similar fluorinated cyclic phosphazene trimers, the FM series, which has exhibited numerous beneficial effects on battery performance, lifetimes, and safety aspects.

  12. Effect of iodination on human growth hormone and prolactin: characterized by bioassay, radioimmunoassay, radioreceptor assay, and electrophoresis

    SciTech Connect (OSTI)

    Hughes, J.P.; Tanaka, T.; Gout, P.W.; Beer, C.T.; Noble, R.L.; Friesen, H.G.

    1982-09-01T23:59:59.000Z

    Human GH (hGH) and PRL (hPRL) were iodinated using lactoperoxidase. The iodinated hormones were characterized by RIA, radioreceptor assay (RRA), and bioassay (BA) using the Nb2 Node lymphoma cell line. The proportion of tracer that could bind to rat liver membranes or rabbit antibodies was determined, and the distribution of iodinated hormones was examined using polyacrylamide gel electrophoresis. Excess antibody was capable of precipitating 87.9% of the radioactivity associated with the hGH tracer and 86.0% of the hPRL tracer. The maximal specific binding to a liver membrane preparation averaged 67.3% of the (/sup 125/I)iodo-hGH radioactivity and 48.8% of the (/sup 125/I)iodo-hPRL radioactivity. The respective BA and RRA activity estimates for (/sup 125/I)iodo-hGH averaged 90% and 114% of the activity measured by the RIA. For (/sup 125/I)iodo-hPRL, the values were 75% by BA and 68% by RRA. The bioactivity profiles of iodinated hGH and hPRL shifted anodally on polyacrylamide gel electrophoresis in comparison to the bioactivity distribution of the respective uniodinated hormones. Iodine incorporation rather than oxidation appeared to be responsible for the shift. After electrophoresis, all eluates which contained significant radioactivity were active in the BA and RIA. Furthermore, specific activities calculated from the bioactive hormone and radioactivity in each electrophoretic segment agreed well with the average specific activity estimated from the amount of iodine incorporated into the protein peak upon gel filtration. These data suggest that hGH and hPRL to a major degree retain biological integrity after iodination.

  13. Effect of iodination on human growth hormone and prolactin: characterized by bioassay, radioimmunoassay, radioreceptor assay, and electrophoresis

    SciTech Connect (OSTI)

    Hughes, J.P. (Univ. of Manitoba, Winnipeg, Canada); Tanaka, T.; Gout, P.W.; Beer, C.T.; Noble, R.L.; Friesen, H.G.

    1982-09-01T23:59:59.000Z

    Human GH (hGH) and PRL (hPRL) were iodinated using lactoperoxidase. The iodinated hormones were characterized by RIA, radioreceptor assay (RRA), and bioassay (BA) using the Nb2 Node lymphoma cell line. The proportion of tracer that could bind to rat liver membranes or rabbit antibodies was determined, and the distribution of iodinated hormones was examined using polyacrylamide gel electrophoresis. Excess antibody was capable of precipitating 87.9% of the radioactivity associated with the hGH tracer and 86.0% of the hPRL tracer. The maximal specific binding to a liver membrane preparation averaged 67.3% of the (/sup 125/I)iodo-hGH radioactivity and 48.8% of the (/sup 125/I)iodo-hPRL radioactivity. The respective BA and RRA activity estimates for (/sup 125/)iodo-hGH averaged 90% and 114% of the activity measured by the RIA. For (/sup 125/I)iodo-hPRL, the values were 75% by BA and 68% by RRA. The bioactivity profiles of iodinated hGH and hPRL shifted anodally on polyacrylamide gel electrophoresis in comparison to the bioactivity distribution of the respective uniodinated hormones. Iodine incorporation rather than oxidation appeared to be responsible for the shift. After electrophoresis, all eluates which contained significant radioactivity were active in the BA and RIA. Furthermore, specific activities calculated from the bioactive hormone and radioactivity in each electrophoretic segment agreed well with the average specific activity estimated from the amount of iodine incorporated into the protein peak upon gel filtration. These data suggest that hGH and hPRL to a major degree retain biological integrity after iodination.

  14. Synthesis, structural and magnetic characterisation of the fluorinated compound 15R-BaFeO{sub 2}F

    SciTech Connect (OSTI)

    Clemens, Oliver, E-mail: oliverclemens@online.de [School of Chemistry, The University of Birmingham, Birmingham B15 2TT (United Kingdom); Berry, Frank J. [School of Chemistry, The University of Birmingham, Birmingham B15 2TT (United Kingdom); Bauer, Jessica [Anorganische Festkörperchemie, Universität des Saarlandes, Am Markt, Zeile 3, 66125 Saarbrücken (Germany); Wright, Adrian J. [School of Chemistry, The University of Birmingham, Birmingham B15 2TT (United Kingdom); Knight, Kevin S. [ISIS Facility, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX (United Kingdom); Slater, Peter R. [School of Chemistry, The University of Birmingham, Birmingham B15 2TT (United Kingdom)

    2013-07-15T23:59:59.000Z

    The compounds 15R-BaFeO{sub 2}F and 15R-BaFeO{sub 2.27}F{sub 0.5} have been synthesised by the low temperature fluorination of 15R-BaFeO{sub 3?d}F{sub 0.2} using polyvinylidenedifluoride (PVDF) as a fluorination agent. The materials have been structurally characterised by Rietveld analysis of the X-ray- and HRPD-powder neutron diffraction data. A detailed analysis of bond valence sums suggests that the oxide and fluoride ions order on the different anion sites. A reinvestigation of our recently published structure (Clemens et al., 2013) [34] of 6H-BaFeO{sub 2}F is also reported and incorporation of fluoride in h-type layers is also confirmed in this compound. The magnetic moments for 15R-BaFeO{sub 2}F and 15R-BaFeO{sub 2.25}F{sub 0.5} align in the a/b-plane with antiferromagnetic alignment of the moments between adjacent layers, and are flipped by 90° as compared to the precursor compound. 15R-BaFeO{sub 2}F exhibits very robust antiferromagnetism with a Néel temperature between 300 and 400 °C. - Graphical abstract: The crystal and magnetic structure of the perovskite phase 15R-BaFeO{sub 2}F. - Highlights: • 15R-BaFeO{sub 2}F and 15R-BaFeO{sub 2.27}F{sub 0.5}were prepared via low temperature fluorination using PVDF. • A structural investigation of the compounds BaFeO{sub 2}F is presented in detail. • This analysis suggests ordering of O{sup 2?} and F{sup ?} anions between different layers. • 15R-BaFeO{sub 2}F shows antiferromagnetic ordering at 300 K with T{sub N} ?300–400 °C. • The magnetic moments align in the a/b-plane.

  15. LITERATURE SURVEY FOR GROUNDWATER TREATMENT OPTIONS FOR NITRATE IODINE-129 AND URANIUM 200-ZP-1 OPERABLE UNIT HANFORD SITE

    SciTech Connect (OSTI)

    BYRNES ME

    2008-06-05T23:59:59.000Z

    This literature review presents treatment options for nitrate, iodine-129, and uranium, which are present in groundwater at the 200-ZP-I Groundwater Operable Unit (OU) within the 200 West Area of the Hanford Site. The objective of this review is to determine available methods to treat or sequester these contaminants in place (i.e., in situ) or to pump-and-treat the groundwater aboveground (i.e., ex situ). This review has been conducted with emphasis on commercially available or field-tested technologies, but theoretical studies have, in some cases, been considered when no published field data exist. The initial scope of this literature review included only nitrate and iodine-I 29, but it was later expanded to include uranium. The focus of the literature review was weighted toward researching methods for treatment of nitrate and iodine-129 over uranium because of the relatively greater impact of those compounds identified at the 200-ZP-I OU.

  16. Dynamics of production of iodine atoms by dissociation of iodides in a pulsed self-sustained discharge

    SciTech Connect (OSTI)

    Vagin, Nikolai P; Kochetov, Igor' V; Napartovich, A P; Yuryshev, Nikolai N

    2013-07-31T23:59:59.000Z

    Absorption at the laser transition has been used for the first time to assess the evolution of concentration of iodine atoms in a pulsed self-sustained discharge in mixtures of iodides with a buffer gas such as molecular nitrogen and helium. Dynamics of the iodine atom production is studied by the method of absorption spectroscopy. The dissociation of C{sub n}F{sub 2n+1}I and CnH{sub 2n+1}I (n = 1, 2) iodides is investigated. The energy required to produce atomic iodine is evaluated. The experimental data obtained for CF{sub 3}I are compared with the results of numerical simulations, their reasonable agreement being demonstrated. (active media)

  17. Features of adsorbed radioactive chemical elements and their isotopes distribution in iodine air filters AU-1500 at nuclear power plants

    E-Print Network [OSTI]

    Neklyudov, I M; Dikiy, N P; Ledenyov, O P; Lyashko, Yu V

    2013-01-01T23:59:59.000Z

    The main aim of research is to investigate the physical features of spatial distribution of the adsorbed radioactive chemical elements and their isotopes in the granular filtering medium in the iodine air filters of the type of AU1500 in the forced exhaust ventilation systems at the nuclear power plant. The gamma activation analysis method is applied to accurately characterize the distribution of the adsorbed radioactive chemical elements and their isotopes in the granular filtering medium in the AU1500 iodine air filter after its long term operation at the nuclear power plant. The typical spectrum of the detected chemical elements and their isotopes in the AU1500 iodine air filter, which was exposed to the bremsstrahlung gamma quantum irradiation, produced by the accelerating electrons in the tantalum target, are obtained. The spatial distributions of the detected chemical element 127I and some other chemical elements and their isotopes in the layer of absorber, which was made of the cylindrical coal granule...

  18. Methods of Gas Phase Capture of Iodine from Fuel Reprocessing Off-Gas: A Literature Survey

    SciTech Connect (OSTI)

    Daryl Haefner

    2007-02-01T23:59:59.000Z

    A literature survey was conducted to collect information and summarize the methods available to capture iodine from fuel reprocessing off-gases. Techniques were categorized as either wet scrubbing or solid adsorbent methods, and each method was generally described as it might be used under reprocessing conditions. Decontamination factors are quoted only to give a rough indication of the effectiveness of the method. No attempt is made to identify a preferred capture method at this time, although activities are proposed that would provide a consistent baseline that would aid in evaluating technologies.

  19. Sulfur Iodine Process Summary for the Hydrogen Technology Down-Selection: Process Performance Package

    SciTech Connect (OSTI)

    Benjamin Russ

    2009-06-01T23:59:59.000Z

    This document describes the details of implementing a Sulfur-Iodine (S-I) hydrogen production plant to deploy with the Next General Nuclear Power Plant (NGNP). Technical requirements and specifications are included, and a conceptual plant design is presented. The following areas of interest are outlined in particular as a baseline for the various technology comparisons: (1) Performance Criteria - (a) Quantity of hydrogen produced, (b) Purity of hydrogen produced, (c) Flexibility to serve various applications, (d) Waste management; (2) Economic Considerations - (a) Cost of hydrogen, (b) Development costs; and (3) Risk - (a) Technical maturity of the S-I process, (b) Development risk, (c) Scale up options.

  20. The Role of Primary 16O as a Neutron Poison in AGB stars and Fluorine primary production at Halo Metallicities

    E-Print Network [OSTI]

    Gallino, R; Cristallo, S; Straniero, O

    2010-01-01T23:59:59.000Z

    The discovery of a historical bug in the s-post-process AGB code obtained so far by the Torino group forced us to reconsider the role of primary 16O in the 13C-pocket, produced by the 13C(a, n)16O reaction, as important neutron poison for the build up of the s-elements at Halo metallicities. The effect is noticeable only for the highest 13C-pocket efficiencies (cases ST*2 and ST). For Galactic disc metallicities, the bug effect is negligible. A comparative analysis of the neutron poison effect of other primary isotopes (12C, 22Ne and its progenies) is presented. The effect of proton captures, by 14N(n, p)14C, boosts a primary production of Fluorine in Halo AGB stars, with [F/Fe] comparable to [C/Fe], without affecting the s-elements production.

  1. Fluorine-containing composition for forming anti-reflection film on resist surface and pattern formation method

    DOE Patents [OSTI]

    Nishi, Mineo (Kitakyushu, JP); Makishima, Hideo (Kitakyushu, JP)

    1996-01-01T23:59:59.000Z

    A composition for forming anti-reflection film on resist surface which comprises an aqueous solution of a water soluble fluorine compound, and a pattern formation method which comprises the steps of coating a photoresist composition on a substrate; coating the above-mentioned composition for forming anti-reflection film; exposing the coated film to form a specific pattern; and developing the photoresist, are provided. Since the composition for forming anti-reflection film can be coated on the photoresist in the form of an aqueous solution, not only the anti-reflection film can be formed easily, but also, the film can be removed easily by rinsing with water or alkali development. Therefore, by the pattern formation method according to the present invention, it is possible to form a pattern easily with a high dimensional accuracy.

  2. Characteristics of ultra low-k nanoporous and fluorinated silica based films prepared by plasma enhanced chemical vapor deposition

    SciTech Connect (OSTI)

    Abbasi-Firouzjah, M. [Laser and Plasma Research Institute, Shahid Beheshti University G.C., Evin, Tehran 1983963113 (Iran, Islamic Republic of)] [Laser and Plasma Research Institute, Shahid Beheshti University G.C., Evin, Tehran 1983963113 (Iran, Islamic Republic of); Shokri, B. [Laser and Plasma Research Institute, Shahid Beheshti University G.C., Evin, Tehran 1983963113 (Iran, Islamic Republic of) [Laser and Plasma Research Institute, Shahid Beheshti University G.C., Evin, Tehran 1983963113 (Iran, Islamic Republic of); Physics Department, Shahid Beheshti University G.C., Evin, Tehran (Iran, Islamic Republic of)

    2013-12-07T23:59:59.000Z

    Low dielectric constant (low-k) silica based films were deposited on p-type silicon and polycarbonate substrates by radio frequency (RF) plasma enhanced chemical vapor deposition method at low temperature. A mixture of tetraethoxysilane vapor, oxygen, and tetrafluoromethane (CF{sub 4}) was used for the deposition of the films in forms of two structures called as SiO{sub x}C{sub y} and SiO{sub x}C{sub y}F{sub z}. Properties of the films were controlled by amount of porosity and fluorine content in the film matrix. The influence of RF power and CF{sub 4} flow on the elemental composition, deposition rate, surface roughness, leakage current, refractive index, and dielectric constant of the films were characterized. Moreover, optical emission spectroscopy was applied to monitor the plasma process at the different parameters. Electrical characteristics of SiO{sub x}C{sub y} and SiO{sub x}C{sub y}F{sub z} films with metal-oxide-semiconductor structure were investigated using current-voltage analysis to measure the leakage current and breakdown field, as well as capacitance-voltage analysis to obtain the film's dielectric constant. The results revealed that SiO{sub x}C{sub y} films, which are deposited at lower RF power produce more leakage current, meanwhile the dielectric constant and refractive index of these films decreased mainly due to the more porosity in the film structure. By adding CF{sub 4} in the deposition process, fluorine, the most electronegative and the least polarized atom, doped into the silica film and led to decrease in the refractive index and the dielectric constant. In addition, no breakdown field was observed in the electrical characteristics of SiO{sub x}C{sub y}F{sub z} films and the leakage current of these films reduced by increment of the CF{sub 4} flow.

  3. Generation of concentration density maxima of small dispersive coal dust particles in horizontal iodine air filter at air-dust aerosol blow

    E-Print Network [OSTI]

    I. M. Neklyudov; O. P. Ledenyov; L. I. Fedorova; P. Ya. Poltinin

    2013-06-11T23:59:59.000Z

    The spatial distributions of the small dispersive coal dust particles with the nano and micro sizes in the granular filtering medium with the cylindrical coal granules in the absorber in the horizontal iodine air filter during its long term operation at the nuclear power plant are researched. It is shown that the concentration density maxima of the small dispersive coal dust particles appear in the granular filtering medium with the cylindrical coal absorbent granules in the horizontal iodine air filter at an action by the air dust aerosol blow. The comparison of the measured aerodynamic resistances of the horizontal and vertical iodine air filters is conducted. The main conclusion is that the magnitude of the aerodynamic resistance of the horizontal iodine air filters is much smaller in comparison with the magnitude of the aerodynamic resistance of the vertical iodine air filters at the same loads of the air dust aerosol volumes. It is explained that the direction of the air dust aerosol blow and the direction of the gravitation force in the horizontal iodine air filter are orthogonal, hence the effective accumulation of the small dispersive coal dust particles takes place at the bottom of absorber in the horizontal iodine air filter. It is found that the air dust aerosol stream flow in the horizontal iodine air filter is not limited by the appearing structures, made of the precipitated small dispersive coal dust particles, in distinction from the vertical iodine air filter, in the process of long term operation of the iodine air filters at the nuclear power plant.

  4. Anthropogenic iodine-129 in seawater along a transect from the Norwegian coastal current to the North Pole

    E-Print Network [OSTI]

    Winsor, Peter

    . The surface waters near the Norwegian coast are found to have 20 times higher 129 I concentration thanAnthropogenic iodine-129 in seawater along a transect from the Norwegian coastal current profiles collected during 2001 along a transect from the Norwegian Coastal Current to the North Pole

  5. Oxygen Discharge and Post-Discharge Kinetics Experiments and Modeling for the Electric Oxygen-Iodine Laser System

    E-Print Network [OSTI]

    Carroll, David L.

    Oxygen Discharge and Post-Discharge Kinetics Experiments and Modeling for the Electric Oxygen a low-pressure oxygen/helium/nitric oxide discharge. In the electric discharge oxygen-iodine laser (ElectricOIL) the discharge production of atomic oxygen, ozone, and other excited species adds levels

  6. Measurement of positive gain on the 1315 nm transition of atomic iodine pumped by O2,,a1

    E-Print Network [OSTI]

    Carroll, David L.

    state I 2 P3/2 . Conventionally, the O2 1 is produced by a liquid chemistry singlet oxygen generator of gain. © 2004 American Institute of Physics. [DOI: 10.1063/1.1784519] The classic chemical oxygen the metastable excited singlet oxygen molecule, O2 a1 [de- noted O2 1 hereafter], and the iodine atom ground

  7. Ab initio studies of ultrafast x-ray scattering of the photodissociation of iodine

    SciTech Connect (OSTI)

    Debnarova, Andrea; Techert, Simone [Max Planck Institute for Biophysical Chemistry, 37077 Goettingen, Am Fassberg 11 (Germany); Schmatz, Stefan [Institut fuer Physikalische Chemie, Universitaet Goettingen, 37077 Goettingen, Tammannstr. 6 (Germany)

    2010-09-28T23:59:59.000Z

    We computationally examine various aspects of the reaction dynamics of the photodissociation and recombination of molecular iodine. We use our recently proposed formalism to calculate time-dependent x-ray scattering signal changes from first principles. Different aspects of the dynamics of this prototypical reaction are studied, such as coherent and noncoherent processes, features of structural relaxation that are periodic in time versus nonperiodic dissociative processes, as well as small electron density changes caused by electronic excitation, all with respect to x-ray scattering. We can demonstrate that wide-angle x-ray scattering offers a possibility to study the changes in electron densities in nonperiodic systems, which render it a suitable technique for the investigation of chemical reactions from a structural dynamics point of view.

  8. The Sulfur-Iodine Cycle: Process Analysis and Design Using Comprehensive Phase Equilibrium Measurements and Modeling

    SciTech Connect (OSTI)

    Thies, Mark C.; O'Connell, J. P.; Gorensek, Maximilian B.

    2010-01-10T23:59:59.000Z

    Of the 100+ thermochemical hydrogen cycles that have been proposed, the Sulfur-Iodine (S-I) Cycle is a primary target of international interest for the centralized production of hydrogen from nuclear power. However, the cycle involves complex and highly nonideal phase behavior at extreme conditions that is only beginning to be understood and modeled for process simulation. The consequence is that current designs and efficiency projections have large uncertainties, as they are based on incomplete data that must be extrapolated from property models. This situation prevents reliable assessment of the potential viability of the system and, even more, a basis for efficient process design. The goal of this NERI award (05-006) was to generate phase-equilibrium data, property models, and comprehensive process simulations so that an accurate evaluation of the S-I Cycle could be made. Our focus was on Section III of the Cycle, where the hydrogen is produced by decomposition of hydroiodic acid (HI) in the presence of water and iodine (I2) in a reactive distillation (RD) column. The results of this project were to be transferred to the nuclear hydrogen community in the form of reliable flowsheet models for the S-I process. Many of the project objectives were achieved. At Clemson University, a unique, tantalum-based, phase-equilibrium apparatus incorporating a view cell was designed and constructed for measuring fluid-phase equilibria for mixtures of iodine, HI, and water (known as HIx) at temperatures to 350 °C and pressures to 100 bar. Such measurements were of particular interest for developing a working understanding of the expected operation of the RD column in Section III. The view cell allowed for the IR observation and discernment of vapor-liquid (VL), liquid-liquid, and liquid-liquid-vapor (LLVE) equilibria for HIx systems. For the I2-H2O system, liquid-liquid equilibrium (LLE) was discovered to exist at temperatures up to 310-315 °C, in contrast to the models and predictions of earlier workers. For the I2-HI-H2O ternary, LLE and LLVE were all observed for the first time at temperatures of 160 and 200 °C. Three LLE tie-lines were measured at 160 °C, and preliminary indications are that the underlying phase behavior could result in further improvements in the performance of the S-I Cycle. Unfortunately, these new results were obtained too late in the project to be incorporated into the modeling and simulation work described below. At the University of Virginia, a uniquely complete and reliable model was developed for the thermodynamic properties of HIx, covering the range of conditions expected for the separation of product hydrogen and recycled iodine in the RD column located in Section III. The model was validated with all available property spectroscopy data. The results provide major advances over prior understanding of the chemical speciation involved. The model was implemented in process simulation studies of the S-I Cycle, which showed improvement in energy efficiency to 42%, as well as significantly smaller capital requirements due to lower pressure operation and much smaller equipment sizes. The result is that the S-I Cycle may be much more economically feasible than was previously thought. If both the experimental and modeling work described above were to be continued to ultimate process optimization, both the American public and the global community would benefit from this alternative energy source that does not produce carbon emissions.

  9. Diffusion of Iodine and Rhenium in Category 3 Waste Encasement Concrete and Soil Fill Material

    SciTech Connect (OSTI)

    Wellman, Dawn M.; Mattigod, Shas V.; Whyatt, Greg A.; Powers, Laura; Parker, Kent E.; Wood, Marcus I.

    2006-12-15T23:59:59.000Z

    Assessing long-term performance of Category 3 waste cement grouts for radionuclide encasement requires knowledge of the radionuclide-cement interactions and mechanisms of retention (i.e. sorption or precipitation). This understanding will enable accurate prediction of radionuclide fate when the waste forms come in contact with groundwater. A set of diffusion experiments using carbonated and non-carbonated concrete-soil half cells was conducted under unsaturated conditions (4% and 7% by wt moisture content). Spiked concrete half-cell specimens were prepared with and without colloidal metallic iron addition and were carbonated using supercritical carbon dioxide. Spikes of I and Re were added to achieve measurable diffusion profile in the soil part of the half-cell. In addition, properties of concrete materials likely to influence radionuclide migration such as carbonation were evaluated in an effort to correlate these properties with the release of iodine and rhenium.

  10. Stable n-CuInSe/sub 2/iodide-iodine photoelectrochemical cell

    DOE Patents [OSTI]

    Cahen, D.; Chen, Y.W.

    1984-09-20T23:59:59.000Z

    In a photoelectrochemical solar cell, stable output and solar efficiency in excess of 10% are achieved with a photoanode of n-CuInSe/sub 2/ electrode material and an iodine/iodide redox couple used in a liquid electrolyte. The photoanode is prepared by treating the electrode material by chemical etching, for example in Br/sub 2//MeOH; heating the etched electrode material in air or oxygen; depositing a surface film coating of indium on the electrode material after the initial heating; and thereafter again heating the electrode material in air or oxygen to oxidize the indium. The electrolyte is treated by the addition of Cu/sup +/ or Cu/sup 2 +/ salts and in In/sup 3 +/ salts.

  11. Optimization of the deposition and annealing conditions of fluorine-doped indium oxide films for silicon solar cells

    SciTech Connect (OSTI)

    Untila, G. G., E-mail: GUntila@mics.msu.su; Kost, T. N.; Chebotareva, A. B.; Timofeyev, M. A. [Moscow State University, Skobel'tsyn Institute of Nuclear Physics (Russian Federation)

    2013-03-15T23:59:59.000Z

    Fluorine-doped indium oxide (IFO) films are deposited onto (pp{sup +})Si and (n{sup +}nn{sup +})Si structures made of single-crystal silicon by ultrasonic spray pyrolysis. The effect of the IFO deposition time and annealing time in an argon atmosphere with methanol vapor on the IFO chemical composition, the photovoltage and fill factor of the Illumination-U{sub oc} curves of IFO/(pp{sup +})Si structures, and the sheet resistance of IFO/(n{sup +}nn{sup +})Si structures, correlating with the IFO/(n{sup +})Si contact resistance, is studied. The obtained features are explained by modification of the properties of the SiO{sub x} transition layer at the IFO/Si interface during deposition and annealing. Analysis of the results made it possible to optimize the fabrication conditions of solar cells based on IFO/(pp{sup +})Si heterostructures and to increase their efficiency from 17% to a record 17.8%.

  12. Fluorine Substituted Conjugated Polymer of Medium Band Gap Yields 7% Efficiency in Polymer--Fullerene Solar Cells

    SciTech Connect (OSTI)

    Price, S C; Stuart, Andrew C.; Yang, L; Zhou, H; You, Wei

    2011-01-01T23:59:59.000Z

    Recent research advances on conjugated polymers for photovoltaic devices have focused on creating low band gap materials, but a suitable band gap is only one of many performance criteria required for a successful conjugated polymer. This work focuses on the design of two medium band gap (?2.0 eV) copolymers for use in photovoltaic cells which are designed to possess a high hole mobility and low highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels. The resulting fluorinated polymer PBnDT?FTAZ exhibits efficiencies above 7% when blended with [6,6]-phenyl C{sub 61}-butyric acid methyl ester in a typical bulk heterojunction, and efficiencies above 6% are still maintained at an active layer thicknesses of 1 ?m. PBnDT?FTAZ outperforms poly(3-hexylthiophene), the current medium band gap polymer of choice, and thus is a viable candidate for use in highly efficient tandem cells. PBnDT?FTAZ also highlights other performance criteria which contribute to high photovoltaic efficiency, besides a low band gap.

  13. Influence by small dispersive coal dust particles of different fractional consistence on characteristics of iodine air filter at nuclear power plant

    E-Print Network [OSTI]

    Neklyudov, I M; Fedorova, L I; Poltinin, P Ya

    2013-01-01T23:59:59.000Z

    The main purpose of research is to determine the influence by the small dispersive coal dust particles of the different fractional consistence on the technical characteristics of the vertical iodine air filter at nuclear power plant. The research on the transport properties of the small dispersive coal dust particles in the granular filtering medium of absorber in the vertical iodine air filter is completed in the case, when the modeled aerodynamic conditions are similar to the real aerodynamic conditions. It is shown that the appearance of the different fractional consistence of small dispersive coal dust particles with the decreasing dimensions down to the micro and nano sizes at the action of the air dust aerosol stream normally results in a significant change of distribution of the small dispersive coal dust particles masses in the granular filtering medium of an absorber in the vertical iodine air filter, changing the vertical iodine air filter aerodynamic characteristics. The precise characterization of...

  14. Influence by small dispersive coal dust particles of different fractional consistence on characteristics of iodine air filter at nuclear power plant

    E-Print Network [OSTI]

    I. M. Neklyudov; O. P. Ledenyov; L. I. Fedorova; P. Ya. Poltinin

    2013-02-18T23:59:59.000Z

    The main purpose of research is to determine the influence by the small dispersive coal dust particles of the different fractional consistence on the technical characteristics of the vertical iodine air filter at nuclear power plant. The research on the transport properties of the small dispersive coal dust particles in the granular filtering medium of absorber in the vertical iodine air filter is completed in the case, when the modeled aerodynamic conditions are similar to the real aerodynamic conditions. It is shown that the appearance of the different fractional consistence of small dispersive coal dust particles with the decreasing dimensions down to the micro and nano sizes at the action of the air dust aerosol stream normally results in a significant change of distribution of the small dispersive coal dust particles masses in the granular filtering medium of an absorber in the vertical iodine air filter, changing the vertical iodine air filter aerodynamic characteristics. The precise characterization of the aerodynamic resistance of a model of the vertical iodine air filter is completed. The comparative analysis of the technical characteristics of the vertical and horizontal iodine air filters is also made.

  15. Iodine-131 releases from the Hanford Site, 1944--1947. Volume 1, Text: Hanford Environmental Dose Reconstruction Project

    SciTech Connect (OSTI)

    Heeb, C.M.

    1992-10-01T23:59:59.000Z

    Releases of fission product iodine-131 from separation plants at the Hanford reservation are calculated for the 1944 through 1947 period. Releases to the atmosphere were from the ventilation stacks of T and B separation plants. A reconstruction of daily separation plant operations forms the basis of the releases. The reconstruction traces the iodine-131 content of each fuel discharge from the B, D, and F Reactors to the dissolving step in the separation plants. Statistical computer modeling techniques are used to estimate hourly release histories based on sampling mathematical distribution functions that express the uncertainties in the source data and timing. The reported daily, monthly, and yearly estimates are averages and uncertainty ranges are based on 100 independent Monte Carlo ``realizations`` of the hourly release histories.

  16. Conversion and correction factors for historical measurements of Iodine-131 in Hanford-area vegetation, 1945--1947: Draft

    SciTech Connect (OSTI)

    Mart, E.I.; Denham, D.H.; Thiede, M.E.

    1993-05-01T23:59:59.000Z

    This report is a result of the Hanford Environmental Dose Reconstruction (HEDR) Project whose goal is to estimate the radiation dose that individuals could have received from emissions since 1944 at the US Department of Energy's (DOE) Hanford Site near Richland, Washington. The report describes in detail the reconstructed conversion and correction factors for historical measurements of iodine-131 in Hanford-area vegetation which was collected from the beginning of October 1945 through the end of December 1947.

  17. Continuous-wave laser oscillation on the 1315 nm transition of atomic iodine pumped by O2,,a1

    E-Print Network [OSTI]

    Carroll, David L.

    oxygen generator. There are many system issues having to do with weight, safety, and the ability.1063/1.1883317 The classic chemical oxygen-iodine laser COIL system1 operates on the I 2 P1/2 I 2 P3/2 electronic transi transfer between the metastable excited singlet oxygen molecule, O2 a1 de- noted as O2 1 hereafter

  18. Adsorbate-induced corrosion: anodic dissolution of palladium induced by chemisorbed iodine in halide-free acid solutions

    E-Print Network [OSTI]

    Schimpf, Janemarie A

    1991-01-01T23:59:59.000Z

    investigated. Iodine was oxidatively chemisorbed on polycrystalline palladium electrodes from a 1mM Nal solution. The experimental measurements were based on electrochemical methods, inductively coupled plasma-optical emission spectroscopy (ICP- OES), and X... of corrosion. ACKNOWLEDGMENT Funding for this work was provided by the National Science Foundation: Presidential Young Investigator Program, and the Robert A. Welch Foundation. I greatly appreciate the predoctoral research fellowships from the Robert A...

  19. Determination of the Relative Amount of Fluorine in Uranium Oxyfluoride Particles using Secondary Ion Mass Spectrometry and Optical Spectroscopy

    SciTech Connect (OSTI)

    Kips, R; Kristo, M J; Hutcheon, I D; Amonette, J; Wang, Z; Johnson, T; Gerlach, D; Olsen, K B

    2009-05-29T23:59:59.000Z

    Both nuclear forensics and environmental sampling depend upon laboratory analysis of nuclear material that has often been exposed to the environment after it has been produced. It is therefore important to understand how those environmental conditions might have changed the chemical composition of the material over time, particularly for chemically sensitive compounds. In the specific case of uranium enrichment facilities, uranium-bearing particles stem from small releases of uranium hexafluoride, a highly reactive gas that hydrolyzes upon contact with moisture from the air to form uranium oxyfluoride (UO{sub 2}F{sub 2}) particles. The uranium isotopic composition of those particles is used by the International Atomic Energy Agency (IAEA) to verify whether a facility is compliant with its declarations. The present study, however, aims to demonstrate how knowledge of time-dependent changes in chemical composition, particle morphology and molecular structure can contribute to an even more reliable interpretation of the analytical results. We prepared a set of uranium oxyfluoride particles at the Institute for Reference Materials and Measurements (IRMM, European Commission, Belgium) and followed changes in their composition, morphology and structure with time to see if we could use these properties to place boundaries on the particle exposure time in the environment. Because the rate of change is affected by exposure to UV-light, humidity levels and elevated temperatures, the samples were subjected to varying conditions of those three parameters. The NanoSIMS at LLNL was found to be the optimal tool to measure the relative amount of fluorine in individual uranium oxyfluoride particles. At PNNL, cryogenic laser-induced time-resolved U(VI) fluorescence microspectroscopy (CLIFS) was used to monitor changes in the molecular structure.

  20. Subwavenumber charge-coupled device spectrometer calibration using molecular iodine laser-induced fluorescence

    SciTech Connect (OSTI)

    Lambert, Joseph G. [Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104 (United States); Hernandez-Diaz, Carlos; Williamson, J. Charles [Department of Chemistry, Willamette University, Salem, Oregon 97301 (United States)

    2010-01-15T23:59:59.000Z

    Spectrometers configured with charge-coupled devices (CCD) or other array-based detectors require calibration to convert from the pixel coordinate to a spectral coordinate. A CCD calibration method well suited for Raman spectroscopy has been developed based on the 514.5 nm Ar{sup +} laser-induced fluorescence (LIF) spectrum of room-temperature molecular iodine vapor. Over 360 primary and secondary I{sub 2} LIF calibration lines spanning 510-645 nm were identified as calibrant peaks using an instrumental resolution of 1 cm{sup -1}. Two instrument calibration functions were evaluated with these peaks: a second-order polynomial and a function derived from simple optomechanical considerations. The latter function provided better fitting characteristics. Calibration using I{sub 2} LIF was tested with measurements of both laser light scattering and Raman spectra. The I{sub 2} LIF reference spectra and the signal spectra were recorded simultaneously, with no cross talk, by separating the two signals spatially along the vertical axis of the CCD imager. In this way, every CCD image could be independently calibrated. An accuracy and a precision of {+-}0.05 cm{sup -1} were achieved with this calibration technique.

  1. Preoperative irradiation, lymphadenectomy, and 125iodine implantation for patients with localized carcinoma of the prostate

    SciTech Connect (OSTI)

    DeLaney, T.F.; Shipley, W.U.; O'Leary, M.P.; Biggs, P.J.; Prout, G.R. Jr.

    1986-10-01T23:59:59.000Z

    Fifty-four patients with clinically and surgically localized prostatic carcinoma were treated with low-dose preoperative irradiation (1050 cGy), pelvic lymphadenectomy, and interstitial /sup 125/Iodine implantation. The follow-up range is 2 to 9 years with a median follow-up of 5 years. Overall local tumor control is 92%. Actuarial 5-year survival is 86% and the actuarial disease-free survival at 5 years is 73%. Patients with poorly differentiated tumors have a significantly worse actuarial survival (62%) at 5 years than patients with well (95%) or moderately well differentiated tumors (93%), p = 0.04. Disease-free survival at 5 years was influenced by grade: well (100%), moderate (60%), and poor (48%), p = 0.03. Multivariate regression analysis indicates that only the degree of differentiation (p = 0.05) significantly impacts on survival. Both degree of differentiation (p = 0.04) and nodal status (p = 0.03) significantly influence disease-free survival. Potency has been maintained in 71% of patients potent at the time of implantation. Late reactions have been acceptable to date: bladder outlet obstruction (13%), mild proctitis (13%), cystourethritis (6%), incontinence (2%), and prostatic calculi (2%).

  2. Detection of Gravitational Redshift on the Solar Disk by Using Iodine-Cell Technique

    E-Print Network [OSTI]

    Takeda, Yoichi

    2012-01-01T23:59:59.000Z

    With an aim to examine whether the predicted solar gravitational redshift can be observationally confirmed under the influence of the convective Doppler shift due to granular motions, we attempted measuring the absolute spectral line-shifts on a large number of points over the solar disk based on an extensive set of 5188-5212A region spectra taken through an iodine-cell with the Solar Domeless Telescope at Hida Observatory. The resulting heliocentric line shifts at the meridian line (where no rotational shift exists), which were derived by finding the best-fit parameterized model spectrum with the observed spectrum and corrected for the earth's motion, turned out to be weakly position-dependent as ~ +400 m/s near the disk center and increasing toward the limb up to ~ +600 m/s (both with a standard deviation of sigma ~ 100 m/s). Interestingly, this trend tends to disappear when the convectiveshift due to granular motions (~-300 m/s at the disk center and increasing toward the limb; simulated based on the two-c...

  3. Chalcogen-based aerogels as a multifunctional platform for remediation of radioactive iodine

    SciTech Connect (OSTI)

    Riley, Brian J.; Chun, Jaehun; Ryan, Joseph V.; Matyas, Josef; Li, Xiaohong S.; Matson, Dean W.; Sundaram, S. K.; Strachan, Denis M.; Vienna, John D.

    2011-12-22T23:59:59.000Z

    Aerogels employing chalcogen-based (i.e., S, Se, and/or Te) structural units and interlinking metals are termed chalcogels and have many emerging applications. Here, chalcogels are discussed in the context of nuclear fuel reprocessing and radioactive waste remediation. Motivated by previous work on removal of heavy metals in aqueous solution, we explored the application of germanium sulfide chalcogels as a sorbent for gas-phase I2 based on Pearson's Hard/Soft Acid-Base (HSAB) principle. This work was driven by a significant need for high-efficiency sorbents for I-129, a long-lived isotope evolved during irradiated UO2 nuclear fuel reprocessing. These chalcogel compositions are shown to possess an affinity for iodine gas, I2(g), at various concentrations in air and the affinity is attributed to a strong chemical attraction between the chalcogen and I2(g), according to the HSAB principle. The high sorption efficiency is facilitated by the high porosity as well as the exceptionally large surface area of the chalcogels.

  4. LABORATORY REPORT ON IODINE ({sup 129}I AND {sup 127}I) SPECIATION, TRANSFORMATION AND MOBILITY IN HANFORD GROUNDWATER, SUSPENDED PARTICLES AND SEDIMENTS

    SciTech Connect (OSTI)

    Kaplan, D.; Santschi, P.; Xu, C.; Zhang, S.; Ho, Y.; Li, H.; Schwehr, K.

    2012-09-30T23:59:59.000Z

    The Hanford Site in eastern Washington produced plutonium for several decades and in the process generated billions of gallons of radioactive waste. Included in this complex mixture of waste was 50 Ci of iodine-129 ({sup 129}I). Iodine-129’s high abundance, due to its high fission yield, and extreme toxicity result in iodine-129 becoming a key risk driver at many Department of Energy (DOE) sites. The mobility of radioiodine in arid environments, such as the Hanford Site, depends largely on its chemical speciation and is also greatly affected by many other environmental factors, especially natural sediment organic matter (SOM). Groundwater radioiodine speciation has not been measured in arid regions with major plumes or large disposed {sup 129}I inventories, including the Hanford Site, Idaho National Laboratory, and Nevada Test Site. In this study, stable iodine-127 and radioiodine-129 speciation, pH, and dissolved organic carbon (DOC) of groundwater samples collected from seven wells located in the 200-West Area of the Hanford site were investigated. The most striking finding was that iodate (IO{sub 3}{sup -}) was the most abundant species. Unexpectedly, iodide (I{sup -}), which was likely the form of iodine in the source materials and the expected dominant groundwater species based on thermodynamic considerations, only accounted for 1-2% of the total iodine concentration. It is likely that the relatively high pH and the low abundance of sedimentary organic matter (SOM) that is present at the site slowed down or even inhibited the reduction of iodate, as SOM abiotically reduce iodate into iodide. Moreover, a study on the kinetics of iodide and iodate uptake and aqueous speciation transformation by three representative subsurface Hanford sediments was performed over a period of about one month. This study was carried out by using iodide-125 or iodate-125 at the ambient iodine-127concentration found at the site. Iodate K{sub d} values were on average 89% greater than iodide K{sub d} values, and the K{sub d} values for both species tended to increase with the amount of organic carbon (OC) present in the sediment. It is especially noteworthy that this trend existed at the very low OC concentrations that naturally exist in the Hanford sediments. Iodine and OC can form essentially irreversible covalent bonds, thereby providing a yet unstudied {sup 129}I retardation reaction at the Hanford Site. In addition to the transformation of iodine species, the sediment collected from the vadose zone also released stable iodide into the aqueous phase. It was found that the three sediments all took up the ambient iodate from the groundwater and slowly transformed it into iodide under the laboratory conditions, likely dependent on the abundance of reducing agents such as organic matter and Fe{sup 2+}. Therefore two competitive iodine processes were identified, the tendency for the sediment to reduce iodate to iodide, and the groundwater chemistry to maintain the iodine as iodate, presumably it is largely the result of natural pH and dissolved O{sub 2}/Eh levels. Suspended carbonate (and silica) particles collected from Hanford groundwater contained elevated amounts of iodine (142 ± 8 ?g/g iodine), consisting mainly of iodate (>99%). Iodate was likely incorporated into the carbonate structure during calcite precipitation upon degasing of CO{sub 2} as the groundwater samples were removed from the subsurface. This concentration of groundwater iodate in precipitated carbonate has implication to long-term fate and transport of 129I and on active in-situ {sup 129}I groundwater remediation. This study provides some of the first groundwater radioiodine speciation studies conducted in arid environments and provides much needed mechanistic descriptions to permit making informed decisions about low-cost/high intellectual input remediation options, such as monitored natural attenuation, or long-term stewardship of nuclear waste disposal sites.

  5. Effects of thermal annealing on the structural, mechanical, and tribological properties of hard fluorinated carbon films deposited by plasma enhanced chemical vapor deposition

    SciTech Connect (OSTI)

    Maia da Costa, M.E.H.; Baumvol, I.J.R.; Radke, C.; Jacobsohn, L.G.; Zamora, R.R.M.; Freire, F.L. Jr. [Departamento de Fisica, Pontificia Universidade Catolica do Rio de Janeiro, Cx. Postal 3807, Rio de Janeiro, RJ, 22453-970 (Brazil); Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 91540-000 (Brazil); Los Alamos National Laboratory, Materials Science and Technology Division, P. O. Box 1663, Los Alamos, New Mexico 87545 (United States); Departamento de Fisica, Pontificia Universidade Catolica do Rio de Janeiro, Cx. Postal 3807, Rio de Janeiro, RJ, 22453-970 (Brazil)

    2004-11-01T23:59:59.000Z

    Hard amorphous fluorinated carbon films (a-C:F) deposited by plasma enhanced chemical vapor deposition were annealed in vacuum for 30 min in the temperature range of 200-600 deg. C. The structural and compositional modifications were followed by several analytical techniques: Rutherford backscattering spectrometry (RBS), elastic recoil detection analysis (ERDA), x-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. Nanoidentation measurements and lateral force microscopy experiments were carried out in order to provide the film hardness and the friction coefficient, respectively. The internal stress and contact angle were also measured. RBS, ERDA, and XPS results indicate that both fluorine and hydrogen losses occur for annealing temperatures higher than 300 deg. C. Raman spectroscopy shows a progressive graphitization upon annealing, while the surface became slightly more hydrophobic as revealed by the increase of the contact angle. Following the surface wettability reduction, a decrease of the friction coefficient was observed. These results highlight the influence of the capillary condensation on the nanoscale friction. The film hardness and the internal stress are constant up to 300 deg. C and decrease for higher annealing temperatures, showing a direct correlation with the atomic density of the films. Since the thickness variation is negligible, the mass loss upon thermal treatment results in amorphous structures with a lower degree of cross-linking, explaining the deterioration of the mechanical properties of the a-C:F films.

  6. Generation of concentration density maxima of small dispersive coal dust particles in horizontal iodine air filter at air-dust aerosol blow

    E-Print Network [OSTI]

    Neklyudov, I M; Fedorova, L I; Poltinin, P Ya

    2013-01-01T23:59:59.000Z

    The spatial distributions of the small dispersive coal dust particles with the nano and micro sizes in the granular filtering medium with the cylindrical coal granules in the absorber in the horizontal iodine air filter during its long term operation at the nuclear power plant are researched. It is shown that the concentration density maxima of the small dispersive coal dust particles appear in the granular filtering medium with the cylindrical coal absorbent granules in the horizontal iodine air filter at an action by the air dust aerosol blow. The comparison of the measured aerodynamic resistances of the horizontal and vertical iodine air filters is conducted. The main conclusion is that the magnitude of the aerodynamic resistance of the horizontal iodine air filters is much smaller in comparison with the magnitude of the aerodynamic resistance of the vertical iodine air filters at the same loads of the air dust aerosol volumes. It is explained that the direction of the air dust aerosol blow and the directi...

  7. High pressure sulfuric acid decomposition experiments for the sulfur-iodine thermochemical cycle.

    SciTech Connect (OSTI)

    Velasquez, Carlos E; Reay, Andrew R.; Andazola, James C.; Naranjo, Gerald E.; Gelbard, Fred

    2005-09-01T23:59:59.000Z

    A series of three pressurized sulfuric acid decomposition tests were performed to (1) obtain data on the fraction of sulfuric acid catalytically converted to sulfur dioxide, oxygen, and water as a function of temperature and pressure, (2) demonstrate real-time measurements of acid conversion for use as process control, (3) obtain multiple measurements of conversion as a function of temperature within a single experiment, and (4) assess rapid quenching to minimize corrosion of metallic components by undecomposed acid. All four of these objectives were successfully accomplished. This report documents the completion of the NHI milestone on high pressure H{sub 2}SO{sub 4} decomposition tests for the Sulfur-Iodine (SI) thermochemical cycle project. All heated sections of the apparatus, (i.e. the boiler, decomposer, and condenser) were fabricated from Hastelloy C276. A ceramic acid injection tube and a ceramic-sheathed thermocouple were used to minimize corrosion of hot liquid acid on the boiler surfaces. Negligible fracturing of the platinum on zirconia catalyst was observed in the high temperature decomposer. Temperature measurements at the exit of the decomposer and at the entry of the condenser indicated that the hot acid vapors were rapidly quenched from about 400 C to less than 20 C within a 14 cm length of the flow path. Real-time gas flow rate measurements of the decomposition products provided a direct measurement of acid conversion. Pressure in the apparatus was preset by a pressure-relief valve that worked well at controlling the system pressure. However, these valves sometimes underwent abrupt transitions that resulted in rapidly varying gas flow rates with concomitant variations in the acid conversion fraction.

  8. Separation, Concentration, and Immobilization of Technetium and Iodine from Alkaline Supernate Waste

    SciTech Connect (OSTI)

    James Harvey; Michael Gula

    1998-12-07T23:59:59.000Z

    Development of remediation technologies for the characterization, retrieval, treatment, concentration, and final disposal of radioactive and chemical tank waste stored within the Department of Energy (DOE) complex represents an enormous scientific and technological challenge. A combined total of over 90 million gallons of high-level waste (HLW) and low-level waste (LLW) are stored in 335 underground storage tanks at four different DOE sites. Roughly 98% of this waste is highly alkaline in nature and contains high concentrations of nitrate and nitrite salts along with lesser concentrations of other salts. The primary waste forms are sludge, saltcake, and liquid supernatant with the bulk of the radioactivity contained in the sludge, making it the largest source of HLW. The saltcake (liquid waste with most of the water removed) and liquid supernatant consist mainly of sodium nitrate and sodium hydroxide salts. The main radioactive constituent in the alkaline supernatant is cesium-137, but strontium-90, technetium-99, and transuranic nuclides are also present in varying concentrations. Reduction of the radioactivity below Nuclear Regulatory Commission (NRC) limits would allow the bulk of the waste to be disposed of as LLW. Because of the long half-life of technetium-99 (2.1 x 10 5 y) and the mobility of the pertechnetate ion (TcO 4 - ) in the environment, it is expected that technetium will have to be removed from the Hanford wastes prior to disposal as LLW. Also, for some of the wastes, some level of technetium removal will be required to meet LLW criteria for radioactive content. Therefore, DOE has identified a need to develop technologies for the separation and concentration of technetium-99 from LLW streams. Eichrom has responded to this DOE-identified need by demonstrating a complete flowsheet for the separation, concentration, and immobilization of technetium (and iodine) from alkaline supernatant waste.

  9. Management of Postoperative Lymphoceles After Lymphadenectomy: Percutaneous Catheter Drainage With and Without Povidone-Iodine Sclerotherapy

    SciTech Connect (OSTI)

    Alago, William, E-mail: alagow@mskcc.org; Deodhar, Ajita; Michell, Hans; Sofocleous, Constantinos T.; Covey, Anne M.; Solomon, Stephen B.; Getrajdman, George I. [Memorial Sloan-Kettering Cancer Center, Interventional Radiology Service, Department of Radiology (United States)] [Memorial Sloan-Kettering Cancer Center, Interventional Radiology Service, Department of Radiology (United States); Dalbagni, Guido [Memorial Sloan-Kettering Cancer Center, Urology Service, Department of Surgery (United States)] [Memorial Sloan-Kettering Cancer Center, Urology Service, Department of Surgery (United States); Brown, Karen T. [Memorial Sloan-Kettering Cancer Center, Interventional Radiology Service, Department of Radiology (United States)] [Memorial Sloan-Kettering Cancer Center, Interventional Radiology Service, Department of Radiology (United States)

    2013-04-15T23:59:59.000Z

    To report our single-center experience in managing symptomatic lymphoceles after lymphadenectomy for genitourinary and gynecologic malignancy and to compare clinical outcomes of percutaneous catheter drainage (PCD) alone versus PCD with transcatheter povidone-iodine sclerotherapy (TPIS). The medical records of patients who presented for percutaneous drainage of pelvic lymphoceles from February 1999 to September 2007 were retrospectively reviewed. Catheters with prolonged outputs >50 cc/day were treated with TPIS. Technical success was defined as the ability to achieve complete resolution of the lymphocele. Clinical success was defined as resolution of the patient's symptoms that prompted the intervention. Sixty-four patients with 70 pelvic lymphoceles were treated. Forty-six patients (71.9 %) had PCD, and 18 patients (28.1 %) had multisession TPIS. The mean initial cavity size was 294.9 cc for those treated with TPIS and 228.2 cc for those treated with PCD alone (range 15-1,600) (p = 0.59). Mean duration of catheter drainage was 19 days (29 days with TPIS, 16 days with PCD, p = 0.001). Mean clinical follow-up was 22.6 months. Technical success was 74.3 % with PCD and 100 % with TPIS. Clinical success was 97 % with PCD and 100 % with TPIS. Postprocedural complications included pericatheter fluid leakage (n = 4), catheter dislodgement (n = 3), catheter occlusion (n = 9), and secondary infection of the collection (n = 4). PCD of symptomatic lymphoceles is an effective postoperative management technique. Initial cavity size is not an accurate predictor of the need for TPIS. When indicated, TPIS is safe and effective with catheter outputs >50 cc/day.

  10. Proceedings of the International Conference on Lasers `95, eds. V.J. Corcoran and T.A. Goldman, STS Press, McLean VA, 1996, pp. 225-231. OPTIMIZING HIGH PRESSURE CHEMICAL OXYGEN-IODINE LASERS

    E-Print Network [OSTI]

    Carroll, David L.

    Press, McLean VA, 1996, pp. 225-231. OPTIMIZING HIGH PRESSURE CHEMICAL OXYGEN-IODINE LASERS David L laser model was baselined to existing oxygen-iodine research assessment and device improvement chemical(1) generator. It may be possible to improve high pressure RADICL performance by increasing the number of large

  11. The influence of iodinated casein and high fat diets on the performance and incidence of fatty livers in laying hens

    E-Print Network [OSTI]

    Young, Louis Lee

    1967-01-01T23:59:59.000Z

    THE INl'LUENCE OF IODINATED CASEIN AND HIGH FAT DIETS ON THE PEBFORMANC' AND INCIDENCE OF FATTY LIVERS IN LAYING H"NS A Thesis Loui" Lee Young Submitted to the Graduate College of the Texas A&II Univer -ity in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE January 1967 Major Subject oultry Science THE INPLUENCE OP IODINA'I "D CAS IN AND HIGH FAT DIETS ON THE P, HFOHMAI'JCE AND INCIDENCE OP PATTY LIVENS IN LAYING HENS A Thesis Louis Lee Young Approved...

  12. Novel fluorinated laser dyes

    DOE Patents [OSTI]

    Hammond, Peter R. (Livermore, CA); Feeman, James F. (Wyomissing, PA)

    1991-01-01T23:59:59.000Z

    A novel class of dye is disclosed which is particularly efficient and stable for dye laser applications, lasing between 540 and 570 nm.

  13. Arylene fluorinated sulfonimide compositions

    DOE Patents [OSTI]

    Teasley, Mark F. (Landenberg, PA)

    2010-11-23T23:59:59.000Z

    Described herein are aromatic sulfonimide compositions that can be used to prepare polymers useful as membranes in electrochemical cells.

  14. Fluorine sites in glasses and transparent glass-ceramics of the system Na{sub 2}O/K{sub 2}O/Al{sub 2}O{sub 3}/SiO{sub 2}/BaF{sub 2}

    SciTech Connect (OSTI)

    Bocker, Christian, E-mail: christian.bocker@uni-jena.d [Otto-Schott-Institut, Jena University, Fraunhoferstr. 6, 07743 Jena (Germany); Munoz, Francisco; Duran, Alicia [Instituto de Ceramica y Vidrio (CSIC), Kelsen 5, 28049 Madrid (Spain); Ruessel, Christian [Otto-Schott-Institut, Jena University, Fraunhoferstr. 6, 07743 Jena (Germany)

    2011-02-15T23:59:59.000Z

    The transparent glass-ceramics obtained in the silicate system Na{sub 2}O/K{sub 2}O/SiO{sub 2}/BaF{sub 2} show homogeneously dispersed BaF{sub 2} nano crystals with a narrow size distribution. The X-ray diffraction and the nuclear magnetic resonance spectroscopy were applied to glasses and the respective glass-ceramics in order to clarify the crystallization mechanism and the role of fluorine during crystallization. With an increasing annealing time, the concentration and also the number of crystals remain approximately constant. With an increasing annealing temperature, the crystalline fraction increases until a saturation limit is reached, while the number of crystals decreases and the size of the crystals increases. Fluoride in the glassy network occurs as Al-F-Ba, Al-F-Na and also as Ba-F structures. The latter are transformed into crystalline BaF{sub 2} and fluoride is removed from the Al-F-Ba/Na bonds. However, some fluorine is still present in the glassy phase after the crystallization. -- Graphical abstract: The X-ray diffraction and the nuclear magnetic resonance spectroscopy were applied to glasses in the silicate system Na{sub 2}O/K{sub 2}O/SiO{sub 2}/BaF{sub 2} and the respective glass-ceramics with BaF{sub 2} nano crystals in order to clarify the crystallization mechanism and the role of fluorine during crystallization. Display Omitted Research highlights: {yields} BaF{sub 2} nano crystals are precipitated from a silicate glass system. {yields} Ostwald ripening during the late stage of crystallization does not occur. {yields} Fluorine in the glass is coordinated with Ba as well as Al together with Ba or Na.{yields} In the glass-ceramics, the residual fluorine is coordinated as Al-F-Ba/Na.

  15. Biodistribution and in vivo kinetics of iodine-131 lipiodol infused via the hepatic artery of patients with hepatic cancer

    SciTech Connect (OSTI)

    Nakajo, M.; Kobayashi, H.; Shimabukuro, K.; Shirono, K.; Sakata, H.; Taguchi, M.; Uchiyama, N.; Sonoda, T.; Shinohara, S.

    1988-06-01T23:59:59.000Z

    The biodistribution and in vivo kinetics of (/sup 131/I)lipiodol infused into the hepatic artery were studied to estimate the potential of internal radiotherapy of hepatic cancer in five patients. It accumulated only in the vascular tumors and adjacent hepatic tissue (AHT) supplied by the infused artery, and to a lesser extent in the lung throughout 8 days imaging sequence. Iodine-131 lipiodol appeared to lead to oil embolization of the tumor and AHT followed by secondary embolization to the lungs and finally the activity was mainly excreted into urine. Four tumors had rapidly and slowly decreasing components, while the AHT activity decreased exponentially from the beginning. The effective half life in tumors was longer with the slow component (mean +/- s.d.: 5.7 +/- 1.2 days) than the AHT (3.7 +/- 0.6 days). The tumor/AHT concentration ratio in three patients at 2 hr was estimated to be 7.5-21. The activity was lower in the lungs than in the AHT in four patients. Iodine-131 lipiodol thus may be used as an intra-arterial infusion agent to treat certain vascular hepatic cancers.

  16. Development of a portable mass spectrometric system for determination of isotopic composition of solid uranium samples using fluorine volatilization. Final report

    SciTech Connect (OSTI)

    Loge, G.

    1994-09-30T23:59:59.000Z

    Using hardware and materials supplied by LANL, a prototype quadrupole mass spectrometer system designed for portable field analysis of isotopic composition of solid uranium samples was assembled and tested. The system contained the capability for fluorine volatilization of solid uranium samples with gas introduction, which was successfully tested and demonstrated using 100 mg samples of U{sub 3}O{sub 8}. Determination of precision and accuracy for measuring isotopic composition was performed using isotopic standards. Use with soil samples containing uranium were also attempted. Silicates in the soil forming SiF{sub 4} were found to be a kinetic bottleneck to the formation of UF{sub 6}. This could be avoided by performing some sort of chemical separation as a pre-treatment step, which was demonstrated using nitric acid.

  17. Gain and continuous-wave laser oscillation on the 1315 nm atomic iodine transition pumped by an air-helium electric discharge

    E-Print Network [OSTI]

    Carroll, David L.

    peroxide and Cl2 gas. Logistic issues with this chemical sin- glet oxygen generator motivated many by a radio-frequency-excited electric discharge sustained in a dry air-He­NO gas mixture. Active oxygen American Institute of Physics. DOI: 10.1063/1.2957678 The classical chemical oxygen iodine laser COIL re

  18. Conversion and correction factors for historical measurements of Iodine-131 in Hanford-area vegetation, 1945--1947: Draft. Hanford Environmental Dose Reconstruction Project

    SciTech Connect (OSTI)

    Mart, E.I.; Denham, D.H.; Thiede, M.E.

    1993-05-01T23:59:59.000Z

    This report is a result of the Hanford Environmental Dose Reconstruction (HEDR) Project whose goal is to estimate the radiation dose that individuals could have received from emissions since 1944 at the US Department of Energy`s (DOE) Hanford Site near Richland, Washington. The report describes in detail the reconstructed conversion and correction factors for historical measurements of iodine-131 in Hanford-area vegetation which was collected from the beginning of October 1945 through the end of December 1947.

  19. Many-body potentials of an open shell atom: Spectroscopy of spin-orbit transitions of iodine in crystalline Xe and Kr

    E-Print Network [OSTI]

    Apkarian, V. Ara

    Many-body potentials of an open shell atom: Spectroscopy of spin-orbit transitions of iodine: 2E,,2-`1E1,2 and 2EI12+ESj2 transitions. Two pairs of bands are observed each in Xe and Kr. The long-body potentials of open shell species-atoms, radicals or molecules-as encountered in condensed media, cannot

  20. Fluorination mechanisms of Al{sub 2}O{sub 3} and Y{sub 2}O{sub 3} surfaces irradiated by high-density CF{sub 4}/O{sub 2} and SF{sub 6}/O{sub 2} plasmas

    SciTech Connect (OSTI)

    Miwa, Kazuhiro; Takada, Noriharu; Sasaki, Koichi [Department of Electrical Engineering and Computer Science, Nagoya University, Nagoya, 464-8603 (Japan); Plasma Nanotechnology Research Center, Nagoya University, Nagoya 464-8603 (Japan)

    2009-07-15T23:59:59.000Z

    Fluorination of Al{sub 2}O{sub 3} and Y{sub 2}O{sub 3} surfaces was investigated by irradiating high-density, helicon-wave CF{sub 4}/O{sub 2} and SF{sub 6}/O{sub 2} plasmas. The Al{sub 2}O{sub 3} surface bombarded by high-flux positive ions of the CF{sub 4}/O{sub 2} plasma was fluorinated significantly. On contrast, Y{sub 2}O{sub 3} was less fluorinated than Al{sub 2}O{sub 3} when they were irradiated by the same CF{sub 4}/O{sub 2} plasma. The analysis of the Al{sub 2}O{sub 3} surface irradiated by the CF{sub 4}/O{sub 2} plasma suggests that the fluorination is triggered by reactions between fluorocarbon deposit and Al-O bonding with the assistance of ion bombardment. On the other hand, irradiation of the SF{sub 6}/O{sub 2} plasma induced less significant fluorination on the Al{sub 2}O{sub 3} surface. This suggests a lower reaction probability between sulfur fluoride deposit and Al-O bonding. The difference in the fluorination of the Al{sub 2}O{sub 3} and Y{sub 2}O{sub 3} surfaces induced by the irradiations of the CF{sub 4}/O{sub 2} and SF{sub 6}/O{sub 2} plasmas is understood by comparing the bonding energies of C-O, S-O, Al-O, and Y-O.

  1. Combinatorial design and synthesis of peptidomimics and small molecules for protein-protein interactions

    E-Print Network [OSTI]

    Park, Chihyo

    2007-04-25T23:59:59.000Z

    pharmacophores and to adjust the solubilities of the products. The fluorinated template also gave libraries of cyclic peptidomimetics on solid phase in good yields and purities. These libraries have improved water solubility over the iodinated libraries. The 3...

  2. JOURNAL DE PHYSIQUE ColZoque C9, suppZe'ment au nO1l, Tome 41, novembre 1980, page C9-449 A POTENTIAL ATOMIC IODINE LASER PUMPED BY ELECTRICALLY GENERATED 'A OXYGEN

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -449 A POTENTIAL ATOMIC IODINE LASER PUMPED BY ELECTRICALLY GENERATED 'A OXYGEN G. Fournier, J. Bonnet and D ation. This paper shows that an electron generator of 1~ oxygen [21 . A condition beam controlled discharge could be an for lasing is a concentration ratio ['A] / efficient oxygen generator to lase with C3z

  3. 3{alpha}-6{alpha}-Dihydroxy-7{alpha}-fluoro-5{beta}-cholanoate (UPF-680), physicochemical and physiological properties of a new fluorinated bile acid that prevents 17{alpha}-ethynyl-estradiol-induced cholestasis in rats

    SciTech Connect (OSTI)

    Clerici, Carlo [Clinica di Gastroenterologia ed Epatologia, Dipartimento di Medicina Clinica e Sperimentale Universita degli Studi di Perugia, 06122 Perugia (Italy)]. E-mail: clerici@unipg.it; Castellani, Danilo [Clinica di Gastroenterologia ed Epatologia, Dipartimento di Medicina Clinica e Sperimentale Universita degli Studi di Perugia, 06122 Perugia (Italy); Asciutti, Stefania [Clinica di Gastroenterologia ed Epatologia, Dipartimento di Medicina Clinica e Sperimentale Universita degli Studi di Perugia, 06122 Perugia (Italy); Pellicciari, Roberto [Istituto di Chimica e Tecnologia del Farmaco, Universita degli Studi di Perugia, via del Liceo, 06123 Perugia (Italy); Setchell, Kenneth D.R. [Division of Pathology, Clinical Mass Spectrometry, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229 (United States)]|[Department of Pediatrics, University of Cincinnati, College of Medicine, Cincinnati, OH 45229 (United States); O'Connell, Nancy C. [Division of Pathology, Clinical Mass Spectrometry, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229 (United States)]|[Department of Pediatrics, University of Cincinnati, College of Medicine, Cincinnati, OH 45229 (United States); Sadeghpour, Bahman; Camaioni, Emidio [Istituto di Chimica e Tecnologia del Farmaco, Universita degli Studi di Perugia, via del Liceo, 06123 Perugia (Italy); Fiorucci, Stefano; Renga, Barbara; Nardi, Elisabetta; Sabatino, Giuseppe; Clementi, Mattia; Giuliano, Vittorio; Baldoni, Monia; Orlandi, Stefano; Mazzocchi, Alessandro; Morelli, Antonio; Morelli, Olivia [Clinica di Gastroenterologia ed Epatologia, Dipartimento di Medicina Clinica e Sperimentale Universita degli Studi di Perugia, 06122 Perugia (Italy)

    2006-07-15T23:59:59.000Z

    3{alpha}-6{alpha}-Dihydroxy-7{alpha}-fluoro-5{beta}-cholanoate (UPF-680), the 7{alpha}-fluorine analog of hyodeoxycholic acid (HDCA), was synthesized to improve bioavailability and stability of ursodeoxycholic acid (UDCA). Acute rat biliary fistula and chronic cholestasis induced by 17{alpha}-ethynyl-estradiol (17EE) models were used to study and compare the effects of UPF-680 (dose range 0.6-6.0 {mu}mol/kg min) with UDCA on bile flow, biliary bicarbonate (HCO{sub 3} {sup -}), lipid output, biliary bile acid composition, hepatic enzymes and organic anion pumps. In acute infusion, UPF-680 increased bile flow in a dose-related manner, by up to 40.9%. Biliary HCO{sub 3} {sup -} output was similarly increased. Changes were observed in phospholipid secretion only at the highest doses. Treatment with UDCA and UPF-680 reversed chronic cholestasis induced by 17EE; in this model, UDCA had no effect on bile flow in contrast to UPF-680, which significantly increased bile flow. With acute administration of UPF-680, the biliary bile acid pool became enriched with unconjugated and conjugated UPF-680 (71.7%) at the expense of endogenous cholic acid and muricholic isomers. With chronic administration of UPF-680 or UDCA, the main biliary bile acids were tauro conjugates, but modification of biliary bile acid pool was greater with UPF-680. UPF-680 increased the mRNA for cytochrome P450 7A1 (CYP7A1) and cytochrome P450 8B (CYP8B). Both UDCA and UPF-680 increased the mRNA for Na{sup +} taurocholate co-transporting polypeptide (NCTP). In conclusion, UPF-680 prevented 17EE-induced cholestasis and enriched the biliary bile acid pool with less detergent and cytotoxic bile acids. This novel fluorinated bile acid may have potential in the treatment of cholestatic liver disease.

  4. Distribution of small dispersive coal dust particles and absorbed radioactive chemical elements in conditions of forced acoustic resonance in iodine air filter at nuclear power plant

    E-Print Network [OSTI]

    Ledenyov, Oleg P

    2013-01-01T23:59:59.000Z

    The physical features of distribution of the small dispersive coal dust particles and the adsorbed radioactive chemical elements and their isotopes in the absorber with the granular filtering medium with the cylindrical coal granules were researched in the case of the intensive air dust aerosol stream flow through the iodine air filter (IAF). It was shown that, at the certain aerodynamic conditions in the IAF, the generation of the acoustic oscillations is possible. It was found that the acoustic oscillations generation results in an appearance of the standing acoustic waves of the air pressure (density) in the IAF. In the case of the intensive blow of the air dust aerosol, it was demonstrated that the standing acoustic waves have some strong influences on both: 1) the dynamics of small dispersive coal dust particles movement and their accumulation in the IAF; 2) the oversaturation of the cylindrical coal granules by the adsorbed radioactive chemical elements and their isotopes in the regions, where the antin...

  5. Models of the formation of oxide phases in nanostructured materials based on lead chalcogenides subjected to treatment in oxygen and iodine vapors

    SciTech Connect (OSTI)

    Maraeva, E. V., E-mail: jenvmar@mail.ru; Moshnikov, V. A.; Tairov, Yu. M. [St. Petersburg State Electrotechnical University 'LETI' (Russian Federation)] [St. Petersburg State Electrotechnical University 'LETI' (Russian Federation)

    2013-10-15T23:59:59.000Z

    Model concepts concerning control over the formation of oxide layers during the course of oxidation are developed on the basis of experimental results of studies of systematic features of the formation of nanostructured layers after diffusion annealing. Data on a variation in the composition of oxide phases as the extent of deviation from stoichiometry is changed in the initial lead chalcogenide are presented. Model concepts related to the possibility of varying the thickness of the coating oxide phases using annealing in an oxygen-containing medium are developed. It is shown that annealing in an iodine atmosphere ensures the effective penetration of oxygen into the grains, which is necessary for an increase in the photoluminescence efficiency.

  6. Standard test method for the analysis of refrigerant 114, plus other carbon-containing and fluorine-containing compounds in uranium hexafluoride via fourier-transform infrared (FTIR) spectroscopy

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2004-01-01T23:59:59.000Z

    1.1 This test method covers determining the concentrations of refrigerant-114, other carbon-containing and fluorine-containing compounds, hydrocarbons, and partially or completely substituted halohydrocarbons that may be impurities in uranium hexafluoride. The two options are outlined for this test method. They are designated as Part A and Part B. 1.1.1 To provide instructions for performing Fourier-Transform Infrared (FTIR) spectroscopic analysis for the possible presence of Refrigerant-114 impurity in a gaseous sample of uranium hexafluoride, collected in a "2S" container or equivalent at room temperature. The all gas procedure applies to the analysis of possible Refrigerant-114 impurity in uranium hexafluoride, and to the gas manifold system used for FTIR applications. The pressure and temperatures must be controlled to maintain a gaseous sample. The concentration units are in mole percent. This is Part A. 1.2 Part B involves a high pressure liquid sample of uranium hexafluoride. This method can be appli...

  7. Correlation of radioactive-waste-treatment costs and the environmental impact of waste effluents in the nuclear fuel cycle: conversion of yellow cake to uranium hexafluoride. Part II. The solvent extraction-fluorination process

    SciTech Connect (OSTI)

    Sears, M.B.; Etnier, E.L.; Hill, G.S.; Patton, B.D.; Witherspoon, J.P.; Yen, S.N.

    1983-03-01T23:59:59.000Z

    A cost/benefit study was made to determine the cost and effectiveness of radioactive waste (radwaste) treatment systems for decreasing the release of radioactive materials and chemicals from a model uranium hexafluoride (UF/sub 6/) production plant using the solvent extraction-fluorination process, and to evaluate the radiological impact (dose commitment) of the release materials on the environment. The model plant processes 10,000 metric tons of uranium per year. Base-case waste treatment is the minimum necessary to operate the process. Effluents meet the radiological requirements listed in the Code of Federal Regulations, Title 10, Part 20 (10 CFR 20), Appendix B, Table II, but may not be acceptable chemically at all sites. Additional radwaste treatment techniques are applied to the base-case plant in a series of case studies to decrease the amounts of radioactive materials released and to reduce the amounts of radioactive materials released and to reduce the radiological dose commitment to the population in the surrounding area. The costs for the added waste treatment operations and the corresponding dose committment are correlated with the annual cost for treatment of the radwastes. The status of the radwaste treatment methods used in the case studies is discussed. Much of the technology used in the advanced cases will require development and demonstration, or else is proprietary and unavailable for immediate use. The methodology and assumptions for the radiological doses are found in ORNL-4992.

  8. Distribution of small dispersive coal dust particles and absorbed radioactive chemical elements in conditions of forced acoustic resonance in iodine air filter at nuclear power plant

    E-Print Network [OSTI]

    Oleg P. Ledenyov; Ivan M. Neklyudov

    2013-06-14T23:59:59.000Z

    The physical features of distribution of the small dispersive coal dust particles and the adsorbed radioactive chemical elements and their isotopes in the absorber with the granular filtering medium with the cylindrical coal granules were researched in the case of the intensive air dust aerosol stream flow through the iodine air filter (IAF). It was shown that, at the certain aerodynamic conditions in the IAF, the generation of the acoustic oscillations is possible. It was found that the acoustic oscillations generation results in an appearance of the standing acoustic waves of the air pressure (density) in the IAF. In the case of the intensive blow of the air dust aerosol, it was demonstrated that the standing acoustic waves have some strong influences on both: 1) the dynamics of small dispersive coal dust particles movement and their accumulation in the IAF; 2) the oversaturation of the cylindrical coal granules by the adsorbed radioactive chemical elements and their isotopes in the regions, where the antinodes of the acoustic waves are positioned. Finally, we completed the comparative analysis of the theoretical calculations with the experimental results, obtained for the cases of: 1) the experimental aerodynamic modeling of physical processes of the absorbed radioactive chemical elements and their isotopes distribution in the IAF; and 2) the gamma-activation spectroscopy analysis of the absorbed radioactive chemical elements and their isotopes distribution in the IAF. We made the innovative propositions on the necessary technical modifications with the purpose to improve the IAF technical characteristics and increase its operational time at the nuclear power plant (NPP), going from the completed precise characterization of the IAF parameters at the long term operation.

  9. The Seebeck coefficient of iodine

    E-Print Network [OSTI]

    Perez-Fernandez, Domingo Miguel

    1968-01-01T23:59:59.000Z

    will be P while 0 across the hot junction will be g + ( 3g/3dT) (dT/dx) (up to 0 first order). This means that 3)/3T will be measured as a thermo- electric potential. The contact potential is determined by the 36 difference between the energy outside... is defined by V Lim AT~ 0 (1. 1) where V is the voltage drop and dT is the difference in temperature of the end points of the sample. Por one type of carriers, the Seebeck coefficient is given by k O. ? ? [z ? p] / kT (1. 2) where e is the electronic...

  10. Original Fluorinated Surfactants Potentially Non-Bioaccumulable

    E-Print Network [OSTI]

    Boyer, Edmond

    to perfluorooctanoic acid (PFOA), ammonium perfluorooctanoate (APFO), or perfluorooctylsulfonic acid (PFOS) regarded are perfluorooctanoic acid (C7F15CO2H, PFOA), ammonium perfluorooctanoate (APFO), and perfluorooctane sulphonate (C8F17 waters, rivers, drinking and rain waters, fresh water ecosystems air[11], urban centers, soils, sediments

  11. Inexpensive, Nonfluorinated (or Partially Fluorinated) Anions...

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

    1 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation es057henderson2011o.pdf More Documents & Publications...

  12. Scalable multiphase microchemical systems for direct fluorination

    E-Print Network [OSTI]

    De Mas Valls, Nuria, 1975-

    2004-01-01T23:59:59.000Z

    Microchemical systems or microreactors refer to a new class of continuous reactors that have feature sizes in the submillimeter range. In particular, microfabricated chemical reactors are built using silicon-based ...

  13. Fluorinated Precursors of Superconducting Ceramics - Energy Innovation

    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 Power AdministrationField8,Dist.New MexicoFinancingProofWorking OutsideFluorescentbeamPortal

  14. Fluorinated Precursors of Superconducting Ceramics - Energy Innovation

    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 Power AdministrationField8,Dist.New MexicoFinancingProofWorking

  15. Photo-effects in iodine single crystals

    E-Print Network [OSTI]

    Rieves, John Michael

    1967-01-01T23:59:59.000Z

    energy distribution for the nsrcury Ianp is sbo?n in pig. 9(c) . No curve ws available for the tuagsten leaps ho?aver, Cbs gsesral profile of tbe spectral energy output is hnoun to folio?a snooth curve ?hicb increases gradually fron ~ vary lo...

  16. Equilibria in trialkylarsine oxide-iodine solutions

    E-Print Network [OSTI]

    Kolar, Frank Lee

    1966-01-01T23:59:59.000Z

    prepared as described by' Zingaro and Meri)anian. A~M 'tn . A Beohnenn DR-1 do ble been reoordtnd spectrophotometer with a thermostatically controlled (+ 0. 1'C. ) cell compartment. B 1 tio ~P'tto . 1 p *te t the **t n ly hygroscopic arsine oxides.... Xamai and B. D. Chernokal'skii, Tr. Xazansk. Khim. Tekhnol. Inst. , 26, 117 (195+9 (k) A. Meri)anlan and R. A. Zingaro, ~Incr . Chem. , 5, 187 (1966) 2. F. Schindler, H. Schmidbaur, and G. Jones, A~n ew. Chem. , 77, 170 (1965). J. Lewis, R. S. Nyholm...

  17. Fluorinated diamondlike carbon templates for high resolution nanoimprint lithography

    E-Print Network [OSTI]

    Hone, James

    plasma etching. An antiadhesion coating was provided through fluorocarbon-based plasma treatment, which of the fluorocarbon plasma treatment was also demonstrated in the antiadhesion treatment of the nanoimprint resist of alkyl silanes with fluorocarbon outer tails are widely used,12­16 increasing the hydrophobic properties

  18. Fluorinated epoxides 5. Highly selective synthesis of diepoxides from

    E-Print Network [OSTI]

    Cirkva, Vladimir

    ±I (n 2, 3) to allyl acetate that afford the corresponding bis-adducts AcOCH2CHICH2(CF2CF2)nCH2CHI±CH2 of the reaction mixture in additions of per¯uoroalkyl iodides to allyl acetate, that were originally carried out

  19. Search For Iron, Nickel, and Fluorine in PG1159 Stars

    E-Print Network [OSTI]

    E. Reiff; T. Rauch; K. Werner; J. W. Kruk; L. Koesterke

    2008-03-01T23:59:59.000Z

    A possible origin of the iron-deficiency in PG1159 stars could be neutron captures on Fe nuclei. A nickel overabundance would corroborate this idea. Consequently we are looking for nickel lines in PG1159 stars. Prime targets are relatively cool objects, because Ni VI is the dominant ionisation stage and the spectral lines of this ion are accessible with UV observations. We do not find such lines in the coolest PG1159 star observed by FUSE (PG1707+427, Teff = 85,000 K) and conclude that the nickel abundance is not enhanced. Hence, the Fe-deficiency in PG1159 stars remains unexplained. In addition, we present results of a wind analysis of the hybrid-PG1159 star NGC 7094 and the [WC]-PG1159 transition-type object Abell 78 in order to derive F abundances from the F VI 1139.5 Angstrom line. In both cases, we find F overabundances, in agreement with results of photospheric analyses of many PG1159 stars. Surprisingly, we find indications for a very low O abundance in NGC 7094.

  20. Arylene-fluorinated-sulfonimide ionomers and membranes for fuel cells

    DOE Patents [OSTI]

    Teasley, Mark F. (Landenberg, PA)

    2011-11-15T23:59:59.000Z

    The preparation of aromatic sulfonimide polymers useful as membranes in electrochemical cells is described.

  1. ORIGINAL PAPER Reactivity versus steric effects in fluorinated ketones

    E-Print Network [OSTI]

    Hammock, Bruce D.

    quantum mechanical computations, which combine gas phase B3LYP calculations with hydration free energies, the development of new CE inhibitors may lead to drugs with therapeutic and/or agrochemical interest [7, 8

  2. Synthesis and material properties of supramolecules containing fluorinated organomercurials 

    E-Print Network [OSTI]

    Taylor, Thomas Jackson

    2009-05-15T23:59:59.000Z

    Cl?phenanthrene]?????????????????? 133 xiv LIST OF TABLES TABLE Page I.1. IR data for selected adducts of 5 and 7????????????? 16 I.2. Radiative Rate Constants and Triplet Lifetimes for Naphthalene, Biphenyl, and Fluorene adducts of 3 and 7... mercury chloride moiety does not appear to be a prerequisite for the formation of arene complexes. In fact, a recent study has shown that 3 forms crystalline adducts with a variety of arenes including naphthalene, biphenyl and fluorene (Chart 8...

  3. Fluorinated Electrolyte for 5-V Li-Ion Chemistry

    Broader source: Energy.gov (indexed) [DOE]

    battery for PHEV and EV applications. Approach 5 LiNi 0.5 Mn 1.5 O 4 1.2M LiPF 6 ECEMC (37 wt%) Graphite, cycled at RT and 55 o C Technical Accomplishments and Progress...

  4. Vanadium-Catalyzed C(sp3 )H Fluorination Reactions

    E-Print Network [OSTI]

    Chen, Chuo

    acquired on an Agilent 6120 Single Quadrupole LC/MS or Agilent 7820A GC/5975 MSD. Materials. Acetonitrile Fluka. Acetonitrile-d3 (D, 99.8%) was purchased from Cambridge Isotope Laboratories, Inc. General acetonitrile (2.0 mL), and the reaction substrate (0.2 mmol, 1.0 equiv). The reaction mixture was degassed

  5. Fluorine Plasma Treatments of Polypropylene Films, 1 Surface Characterizationa

    E-Print Network [OSTI]

    Kushner, Mark

    fluorides, such as SF6.[3] The plasma polymer- ization of fluorocarbons, such as C2F4 or n-C4F10, is another

  6. Methodology for Improved Adhesion for Deposited Fluorinated Transparent

    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 82981-1cnHighand Retrievals fromprocess used in mining - Energy

  7. Fluorinated Arylboron Oxalate for Non-Aqueous Battery Electrolytes - Energy

    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 Power AdministrationField8,Dist.New MexicoFinancingProofWorking OutsideFluorescentbeam

  8. Fluorine-Modified Polyaromatic Hydrocarbons for Organic Electronics -

    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 Power AdministrationField8,Dist.New MexicoFinancingProofWorkingEnergy Innovation Portal

  9. Inexpensive, Nonfluorinated (or Partially Fluorinated) Anions for Lithium

    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(Fact Sheet),EnergyImprovementINDIAN COUNTRYBarriersPipeline Research

  10. Inexpensive, Nonfluorinated (or Partially Fluorinated) Anions for Lithium

    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(Fact Sheet),EnergyImprovementINDIAN COUNTRYBarriersPipeline ResearchSalts and

  11. COMBUSTION DRIVEN ATOMIC FLUORINE GENERATORS FOR DF CHEMICAL LASERS Abstract -Conventional high pressure corabustors delivering atomic fluorine for DF chemical

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    compositions assuming frozen isentropic expansion and with or without heat losses in the combustor. The values production at good overall laser power. 1. INTRODUCTION Available references describing combustors for also reactants. Solid propellant com- high production of F atom by thermal equilibrium positions such as NF

  12. Speciation and transport of anthropogenic 129Iodine and natural 127Iodine in surface and subsurface environments

    E-Print Network [OSTI]

    Schwehr, Kathleen Ann

    2005-02-17T23:59:59.000Z

    could provide a geochronometer, similar to the way 14C is used, particularly for terrestrial organic matter that is less than 50 years old. A series of laboratory experiments and field investigations were carried out to characterize the dominant chemical...

  13. 1462 VOLUME 33J O U R N A L O F P H Y S I C A L O C E A N O G R A P H Y 2003 American Meteorological Society

    E-Print Network [OSTI]

    MacKinnon, Jennifer

    of ornithine and betaine bearing intact polar lipids could be an indicator of a phos- phate-limited ecosystem

  14. CORRELATION OF FAILURE TIRES FOR IODINE SCC OF ZIRCALOY

    E-Print Network [OSTI]

    Shann, S.

    2013-01-01T23:59:59.000Z

    D. Cllbiocciotti, & Jones, "EPRI - NASA Cooperative P:rojon Corrosion Cracking", EPRI NP-717 (1978). Cubiocciotti,R.L. Jones and Zircaloy", EPRI NP-1329 (19SO). C. Syrett, "

  15. acex project iodine: Topics by E-print Network

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

    the magmatic component were mainly derived from marine sediments subducted in the Nankai Trough. These observations suggest that recycling of subducted sediments is an active...

  16. ace iodine project: Topics by E-print Network

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

    Miu, Kevin (Kevin K.) 2006-01-01 210 Ainsi, grace au th eor eme 47, est satisfaisable ssi l'ensemble des abrres a branchement au plus d reconnus par Computer Technologies and...

  17. Measurement of the resistivity versus temperature in iodine single crystals

    E-Print Network [OSTI]

    Somoano, Robert Bonner

    1964-01-01T23:59:59.000Z

    ''vr'xcaT :. . -; '. conduction mec'hanism similar' to. that yropose'd bj'thi band thccxjr, ". '=. : ', . '::'-''-' in solid'state- phjsics -'ibis aiticje stimulated''considbrable / 9nterest 9. n''thc solid state p'rope'rites ox m'olecuinr crystals' ;' '. -'. , ; ? Nost of...'armies' ?' "-:-', ?&. ':: ~ of iodixio w. der . preseux'o ~&ne results of the war'- dona. in the punt few ?"eIxrs indicate t'hat, there is considerable cU, cn~reezent . ' ' . , -'acbO4ti-tIXe: C&n, -, e MMhe=:rSSXS4anba-af itijHne -With, -Prb~ure--XCnd , ?' '-' ji1sy...

  18. Multiple ionization and fragmentation dynamics of molecular iodine studied in

    E-Print Network [OSTI]

    Kling, Matthias

    ­probe experiments K. Schnorr,a A. Senftleben,ab G. Schmid,a A. Rudenko,c M. Kurka,a K. Meyer,a L. Foucar,d M. K

  19. Technetium and Iodine Separations in the UREX Process.

    SciTech Connect (OSTI)

    Schroeder, N. C. (Norman C.); Attrep, Moses; Marrero, T. (Thomas)

    2001-01-01T23:59:59.000Z

    The Accelerator Transmutation of Waste (ATW) program is being developed to determine the feasibility of separatin and transmutating the transactinides (Pu-Cm) and long-lived fission product (99Tc and 'I) from spent light water reactor (LWR) fuel. This approach would help with the disposal of spent commercial fuel. In addition, since the residual waste after ATW treatment will have much lower levels of long-lived species, this process may improve the performance and acceptability of long-term geologic disposal of nuclear waste. A roadmap for the Accelerator Transmutation of Waste (ATW) was submitted to Congress in 1999.' This document gave an overall view of the ATW concept and program. A subsequent document prepared by the Technical Working Group for ATW Separations Technologies and Waste Forms issued a second roadmap that dealt more specifically with the radionuclide separations and waste disposal needs for the ATW program.' This latter document discusses the UREX (Uranium Extraction) process. The latest iteration of the UREX flowsheet is shown in Figure le3T his flowsheet anticipates the co-extraction of technetium with uranium from dissolved LWR fuel by tributylphosphate (TBP) and their subsequent sequential bwk-extraction from the TBP stream.

  20. Dry deposition of gaseous elemental iodine on water

    E-Print Network [OSTI]

    Allen, Michael Dana

    1974-01-01T23:59:59.000Z

    after they strike the surface. Aerodynamic mechanisms of mass transport have previously been listed; processes by which particles or gases "stick" to a collection medium are vagueIy reported as impaction, adsorption, electrostatic forces, snd... and vapors. The height at which the (4) volumetric concentration is measured should 'be reported in conJunction with an experimental value of V, but, in geners1, except for very close to the surface, the concentration does not change appreciably...

  1. The crystal structure of the triphenylphosphine sulfide - iodine addition complex

    E-Print Network [OSTI]

    Schweikert, William Walter

    1966-01-01T23:59:59.000Z

    . . 7274 92 ~ 8810 35*3628 33. 6805 16. 7589 25 3752 16 5130 22. 7232 55 ' 4284' 48. 4644 53. 8980 113. 6853 39 0346 ? ? ? -25. 3724 0 0 0 0 0 5 5 5 -5 6 8 8 0 34 2100 17 8600 7 4900 '11 4300 19 5600 36 1436 16 3137 14 ' 1642...

  2. Radioactive Iodine and Krypton Control for Nuclear Fuel Reprocessing Facilities

    SciTech Connect (OSTI)

    Soelberg, Nicolas R. [Idaho National Laboratory, Idaho Falls, ID (United States); Garn, Troy [Idaho National Laboratory, Idaho Falls, ID (United States); Greenhalgh, Mitchell [Idaho National Laboratory, Idaho Falls, ID (United States); Law, Jack [Idaho National Laboratory, Idaho Falls, ID (United States); Jubin, Robert T. [Oak Ridge National Laboratory, Oak Ridge, TN (United States); Strachan, Denis M. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Thallapally, Praveen K. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

    2013-01-01T23:59:59.000Z

    Nuclear fission results in the production of fission products and activation products, some of which tend to be volatile during used fuel reprocessing. These can evolve in volatile species in the reprocessing facility off-gas streams, depending on the separations and reprocessing technologies that are used. Radionuclides that have been identified as “volatile radionuclides” are noble gases (most notably isotopes of Kr and Xe); 3H; 14C; and 129I. Radionuclides that tend to form volatile species that evolve into reprocessing facility off-gas systems are more challenging to efficiently control compared to radionuclides that tend to stay in solid or liquid phases. Future used fuel reprocessing facilities in the United States can require efficient capture of some volatile radionuclides in their off-gas streams to meet regulatory emission requirements. In aqueous reprocessing, these radionuclides are most commonly expected to evolve into off-gas streams in tritiated water [3H2O (T2O) and 3HHO (THO)], radioactive CO2, noble gases, and gaseous HI, I2, or volatile organic iodides. The fate and speciation of these radionuclides from a non-aqueous fuel reprocessing facility is less well known at this time, but active investigations are in progress. An Off-Gas Sigma Team was formed in late FY 2009 to integrate and coordinate the Fuel Cycle Research and Development (FCR&D) activities directed towards the capture and sequestration of the these volatile radionuclides (Jubin 2012a). The Sigma Team concept was envisioned to bring together multidisciplinary teams from across the DOE complex that would work collaboratively to solve the technical challenges and to develop the scientific basis for the capture and immobilization technologies such that the sum of the efforts was greater than the individual parts. The Laboratories currently participating in this effort are Argonne National Laboratory (ANL), Idaho National Laboratory (INL), Oak Ridge National Laboratory (ORNL), Pacific Northwest National Laboratory (PNNL), and Sandia National Laboratories (SNL). This article focuses on control of volatile radionuclides that evolve during aqueous reprocessing of UNF. In particular, most of the work by the Off-gas Sigma Team has focused on the capture and sequestration of 129I and 85Kr, mainly because, as discussed below, control of 129I can require high efficiencies to meet regulatory requirements, and control of 85Kr using cryogenic processing, which has been the technology demonstrated and used commercially to date, can add considerable cost to a reprocessing facility.

  3. The contribution of oceanic methyl iodide to stratospheric iodine

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    CH 3 I transport from the surface to the cold point (giventhe vertical transport from the surface to the cold point atCH 3 I transport from the ocean surface to the cold point in

  4. Method for the simultaneous preparation of radon-211, xenon-125, xenon-123, astatine-211, iodine-125 and iodine-123

    DOE Patents [OSTI]

    Mirzadeh, S.; Lambrecht, R.M.

    1985-07-01T23:59:59.000Z

    The invention relates to a practical method for commercially producing radiopharmaceutical activities and, more particularly, relates to a method for the preparation of about equal amount of Radon-211 (/sup 211/Rn) and Xenon-125 (/sup 125/Xe) including a one-step chemical procedure following an irradiation procedure in which a selected target of Thorium (/sup 232/Th) or Uranium (/sup 238/U) is irradiated. The disclosed method is also effective for the preparation in a one-step chemical procedure of substantially equal amounts of high purity /sup 123/I and /sup 211/At. In one preferred arrangement of the invention almost equal quantities of /sup 211/Rn and /sup 125/Xe are prepared using a onestep chemical procedure in which a suitably irradiated fertile target material, such as thorium-232 or uranium-238, is treated to extract those radionuclides from it. In the same one-step chemical procedure about equal quantities of /sup 211/At and /sup 123/I are prepared and stored for subsequent use. In a modified arrangement of the method of the invention, it is practiced to separate and store about equal amounts of only /sup 211/Rn and /sup 125/Xe, while preventing the extraction or storage of the radionuclides /sup 211/At and /sup 123/I.

  5. A study of the electrical resistivity of the perylene-iodine complex for various ratios of perylene to iodine

    E-Print Network [OSTI]

    Miller, Bruce Melville

    1964-01-01T23:59:59.000Z

    spar c' "c' ' 0 suc 1088 i ' ~ tnc "1 cv OQGJy : ontiol cd one- for . lure 'od'nc i=c 0 i:. Sano is seas. "rc. ". e. . ts Sbo::ed drop i. res- stivity:or polycr js'"-llinc iocine oz jac or of onc t. . Gusand over Q pressure ranee of for ij tnousand...

  6. Chemically modified graphite for electrochemical cells

    DOE Patents [OSTI]

    Greinke, R.A.; Lewis, I.C.

    1998-05-26T23:59:59.000Z

    This invention relates to chemically modified graphite particles: (a) that are useful in alkali metal-containing electrode of a electrochemical cell comprising: (1) the electrode, (2) a non-aqueous electrolytic solution comprising an organic aprotic solvent which solvent tends to decompose when the electrochemical cell is in use, and an electrically conductive salt of an alkali metal, and (3) a counter electrode; and (b) that are chemically modified with fluorine, chlorine, iodine or phosphorus to reduce such decomposition. This invention also relates to electrodes comprising such chemically modified graphite and a binder and to electrochemical cells containing such electrodes. 3 figs.

  7. FLUOROGERMANIUM(IV) SALTS OF GRAPHITE -- A SYSTEM IN EQUILIBRIUM WITH ELEMENTAL FLUORINE

    E-Print Network [OSTI]

    McCarron, E.M.

    2012-01-01T23:59:59.000Z

    of Energy, under Contract W-7405-Eng-48, a grant from EXXONEnergy under Contract W-7405-ENG-48 DISCLAIMER This document

  8. Fluorinated and hemifluorinated surfactants derived from maltose: Synthesis and application to handling membrane

    E-Print Network [OSTI]

    surfactants have been obtained by grafting by radical reaction either a fluorocarbon or an ethyl end-capped fluorocarbon chain onto the double bond of b-DD-allyl maltose. The two compounds thus obtained form

  9. Plasma fluorination of carbon-based materials for imprint and molding lithographic applications

    E-Print Network [OSTI]

    Hone, James

    to a fluorocarbon-based plasma, yielding an ultrathin layer of a fluorocarbon material on the surface which has alkyl silane self-assembled monolayer7­10 SAM with fluorocarbon tails at the outer surface either by im fluorocarbon functional groups provide a low energy to the modified sur- face, with surface energies

  10. Preparations and characterizations of novel graphite-like materials and some high oxidation state fluorine chemistry

    SciTech Connect (OSTI)

    Shen, Ciping

    1992-11-01T23:59:59.000Z

    Novel graphite-like materials, BC{sub x} (6>x{ge}3), have been prepared using BCl{sub 3} and C{sub 6}H{sub 6} at 800--1000C, and C{sub x}N (14>x{ge}5) have been synthesized using C{sub 5}H{sub 5}N and Cl{sub 2} at 680C--986C. Bulk and thin film characterization were used to study the structure and bonding in these solids. C{sub 8}K(NH{sub 3}){sub 1.1} was prepared by reacting C{sub 8}K with gaseous NH{sub 3}. The carbon sub-lattice is hexagonal: a = 2.47 {Angstrom}, c = 6.47 {Angstrom}. The smaller a parameter and lower conductivity are attributed to smaller electron transfer from K to the conduction band solvation of K by NH{sub 3}. A simplified liquid phase method for synthesizing Li-graphite intercalation compounds has been developed; synthesis of a lamellar mixed conductor, C{sub x}{sup +}Li{sub 2}N{sup {minus}}, has been attempted. Stability and conductivity of (BN){sub 3}SO{sub 3}F have been studied; it was shown to be metallic with a specific conductivity of 1.5 S{center_dot}cm{sup {minus}1}. Its low conductivity is attributed to the low mobility of holes in BN sheets.

  11. Chemistry of fluorine in the oxidation of silicon S. 8. Kasi,`) M. Liehr, and S. Cohen

    E-Print Network [OSTI]

    Rubloff, Gary W.

    .s Wafer pretreatment in- volved one of the following types, (i) a modified RCA clean,' i.e., with no HF to previ- ously published data.2,4 High-resolution electron energy loss and thermal de- sorption

  12. Simple fluorinated moiety insertion on A? 16–23 peptide for stain-free TEM imaging

    E-Print Network [OSTI]

    Sonzini, Silvia; Jones, Samuel T.; Walsh, Zarah; Scherman, Oren A.

    2015-01-29T23:59:59.000Z

    at 25 °C. A? (16–23) and F-A? (16–23) pretreated samples were dissolved (50 ?M) in phosphate buffer 10 mM pH 7.4, the concentration checked via UV-vis spectroscopy (see ESI†), and the first data point (time 0 h) collected. The samples were... previously.28 Dry peptide films can be stored at –20 °C until used, but they were usually freshly prepared. 2.3. Circular dichroism (CD) measurements CD data were recorded on an Applied Photophysics Chirascan spectrometer, measuring from 250 nm to 195 nm...

  13. Comparative study of four fluorinated quinolones in susceptibility factors on microorganisms

    E-Print Network [OSTI]

    Patel, Ketul R

    2013-02-22T23:59:59.000Z

    DNA gyrase on DNA. They bind to the DNA gyrase enzyme and therefore, the enzyme is ineffective in resealing and winding the DNA afler replication. Specifically, DNA gyrase has two gyrA subunits. It has been found through previous experimentation... line indicates the DNA strand. Bacterial Chromosome Sup ercoiling Coiled NA RNA core Replication DNA strands are cut, separated and resealed for replication, "Negative" supercoiling temporarily straightens DNA so that replication can...

  14. FLUORINATED HYDROXYTELECHELIC POLYBUTADIENE AS ADDITIVE IN CATIONIC PHOTOPOLYMERIZATION OF AN EPOXY RESIN

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    OF AN EPOXY RESIN B. Ameduri 1 , R. Bongiovanni2 , M. Sangermano2 , A. Priola2 1 Ingénierie et Architectures in original formulations to enable the UV cationic polymerization of a telechelic diepoxy cycloaliphatic resin) values showing a surface modification of the epoxy based system. Indeed, great modifications were noted

  15. Solvation of the Fluorine Containing Anions and Their Lithium Salts in Propylene Carbonate and Dimethoxyethane

    E-Print Network [OSTI]

    Chaban, Vitaly

    2015-01-01T23:59:59.000Z

    Electrolyte solutions based on the propylene carbonate (PC)-dimethoxyethane (DME) mixtures are of significant importance and urgency due to emergence of lithium-ion batteries. Solvation and coordination of the lithium cation in these systems have been recently attended in detail. However, analogous information concerning anions (tetrafluoroborate, hexafluorophosphate) is still missed. This work reports PM7-MD simulations (electronic-structure level of description) to include finite-temperature effects on the anion solvation regularities in the PC-DME mixture. The reported result evidences that the anions appear weakly solvated. This observation is linked to the absence of suitable coordination sites in the solvent molecules. In the concentrated electrolyte solutions, both BF4 and PF6 prefer to exist as neutral ion pairs (LiBF4, LiPF6).

  16. Fluorinated Nanoparticles: A Novel Technology Platform for Multimodal Biomedical Imaging Applications

    E-Print Network [OSTI]

    Bailey, Mark Michael

    2010-07-26T23:59:59.000Z

    sizes were measured using small angle neutron scattering and dynamic light scattering, nuclear magnetic resonance signal was measured using 19F NMR, and chemical functional groups were determined using FTIR. Particle size and structure were also examined...

  17. Subcellular boron and fluorine distributions with SIMS ion microscopy in BNCT and cancer research

    SciTech Connect (OSTI)

    Subhash Chandra

    2008-05-30T23:59:59.000Z

    The development of a secondary ion mass spectrometry (SIMS) based technique of Ion Microscopy in boron neutron capture therapy (BNCT) was the main goal of this project, so that one can study the subcellular location of boron-10 atoms and their partitioning between the normal and cancerous tissue. This information is fundamental for the screening of boronated drugs appropriate for neutron capture therapy of cancer. Our studies at Cornell concentrated mainly on studies of glioblastoma multiforme (GBM). The early years of the grant were dedicated to the development of cryogenic methods and correlative microscopic approaches so that a reliable subcellular analysis of boron-10 atoms can be made with SIMS. In later years SIMS was applied to animal models and human tissues of GBM for studying the efficacy of potential boronated agents in BNCT. Under this grant the SIMS program at Cornell attained a new level of excellence and collaborative SIMS studies were published with leading BNCT researchers in the U.S.

  18. Inexpensive, Nonfluorinated (or Partially Fluorinated) Anions for Lithium Salts and Ionic Liquids for Lithium Battery Electrolytes

    Broader source: Energy.gov [DOE]

    2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

  19. a-fluorinated ethers thioethers: Topics by E-print Network

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

    Low Band Gap Polymers" Weibin Cui and Fred Wudl Macromolecules, 46 (18): 7232-7238 (2013). DOI Link "A Montarnal, Nancy D. Eisenmenger, Sung-Yu Ku, Michael L....

  20. For Immediate Release --Wednesday, January 29, 2014 University of Lethbridge launches new fluorine research

    E-Print Network [OSTI]

    Seldin, Jonathan P.

    , plastics, refrigeration, oil production, medical imaging and aluminum production MHz nuclear magnetic resonance spectrometer, a Raman spectrometer and an x

  1. Rapid Hydrolysis of Organophosphorous Esters Induced by Nanostructured, Fluorine-Doped Titania Replicas of Diatom Frustules

    E-Print Network [OSTI]

    Huang, Ching-Hua

    of the organophosphorous esters, methyl paraoxon (MOX), and methyl parathion (MTH) (Fig. 1), in the absence of light and at near neutral pH condi- tions. MOX and MTH are widely used insecticides in crop and fruit production

  2. Comparative study of four fluorinated quinolones in susceptibility factors on microorganisms 

    E-Print Network [OSTI]

    Patel, Ketul R

    2013-02-22T23:59:59.000Z

    . This study hopes to prove an equal effectiveness of enrofloxacin and ciprofloxacin. Microbial susceptibility to drugs is measured by determining the MIC (Minimum Inhibitory Concentration). The MIC is measured based on the growth of the targeted bacteria...

  3. Experimental determination of fluorine and hydrogen partitioning between apatite and basaltic melt

    E-Print Network [OSTI]

    Huh, Michael Chahn

    2013-01-01T23:59:59.000Z

    3. Sample of apatite decontamination Figure 4. Image ofintroduced during the decontamination (Figure 3) step due tomade to improve on the decontamination step (e.g. F/P vs K/P

  4. Fluorination of "brick and mortar" soft-templated graphitic ordered mesoporous carbons for high

    E-Print Network [OSTI]

    Geohegan, David B.

    compared to standard OMCs, making these ideal candidates for supercapacitor and rechargeable Li-ion battery

  5. Modification of Silica Nanoparticles by Grafting of Copolymers Containing Organosilane and Fluorine Moities.

    E-Print Network [OSTI]

    Boyer, Edmond

    .23513 #12;2 Introduction Organic polymer / inorganic hybrid nanocomposites are of current research/silica weight ratio until a maximum value of 2.26 mol.m-2 . Keywords: cotelomerization; grafting onto; hybrid nanoparticle; perfluoroacrylate; silica nanocomposite. hal-00412444,version1-1Sep2009 Author manuscript

  6. Unpassivated high power deeply recessed GaNHEMTs with fluorine-plasma surface treatment

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    µm deeply recessed GaN HEMTs on SiC substrate at 4 GHz. Anµm deeply recessed GaN HEMTs on SiC substrate at 4 GHz. An

  7. Visible Light-Promoted Metal-Free sp3 -CH Fluorination

    E-Print Network [OSTI]

    Chen, Chuo

    of acetophenone in acetonitrile at different concentrations. #12;S2 Figure S2. The UV-vis spectra of 5 mol % acetophenone catalyst alone in acetonitrile (4 mM) (red), and of the reaction mixture (5 mol % acetophenone, 1.0 equiv ethylbenzene, 2.0 equiv Selectfluor) in acetonitrile (blue). #12;S3 Figure S2. The UV-vis spectra

  8. Start detector T0 for trigger and time-of-flight systems of the

    E-Print Network [OSTI]

    -ISTC SAC Seminar 6 HMPID PHOS (3/5) ITS TOF TPC Central Barrel || Magnet Research, Russia ­ Moscow Engineering-Physics Institute, Russia ­ Kurchatov Institute, Russia ­ University

  9. Amino acid analogs for tumor imaging

    DOE Patents [OSTI]

    Goodman, M.M.; Shoup, T.

    1998-10-06T23:59:59.000Z

    The invention provides novel amino acid compounds of use in detecting and evaluating brain and body tumors. These compounds combine the advantageous properties of 1-amino-cycloalkyl-1-carboxylic acids, namely, their rapid uptake and prolonged retention in tumors with the properties of halogen substituents, including certain useful halogen isotopes including fluorine-18, iodine-123, iodine-125, iodine-131, bromine-75, bromine-76, bromine-77 and bromine-82. In one aspect, the invention features amino acid compounds that have a high specificity for target sites when administered to a subject in vivo. Preferred amino acid compounds show a target to non-target ratio of at least 5:1, are stable in vivo and substantially localized to target within 1 hour after administration. An especially preferred amino acid compound is [{sup 18}F]-1-amino-3-fluorocyclobutane-1-carboxylic acid (FACBC). In another aspect, the invention features pharmaceutical compositions comprised of an {alpha}-amino acid moiety attached to either a four, five, or a six member carbon-chain ring. In addition, the invention features analogs of {alpha}-aminoisobutyric acid.

  10. Amino acid analogs for tumor imaging

    DOE Patents [OSTI]

    Goodman, M.M.; Shoup, T.

    1998-09-15T23:59:59.000Z

    The invention provides novel amino acid compounds of use in detecting and evaluating brain and body tumors. These compounds combine the advantageous properties of 1-amino-cycloalkyl-1-carboxylic acids, namely, their rapid uptake and prolonged retention in tumors with the properties of halogen substituents, including certain useful halogen isotopes including fluorine-18, iodine-123, iodine-125, iodine-131, bromine-75, bromine-76, bromine-77 and bromine-82. In one aspect, the invention features amino acid compounds that have a high specificity for target sites when administered to a subject in vivo. Preferred amino acid compounds show a target to non-target ratio of at least 5:1, are stable in vivo and substantially localized to target within 1 hour after administration. An especially preferred amino acid compound is [{sup 18}F]-1-amino-3-fluorocyclobutane-1-carboxylic acid (FACBC). In another aspect, the invention features pharmaceutical compositions comprised of an {alpha}-amino acid moiety attached to either a four, five, or a six member carbon-chain ring. In addition, the invention features analogs of {alpha}-aminoisobutyric acid.

  11. Amino acid analogs for tumor imaging

    DOE Patents [OSTI]

    Goodman, Mark M. (Atlanta, GA); Shoup, Timothy (Decatur, GA)

    1998-09-15T23:59:59.000Z

    The invention provides novel amino acid compounds of use in detecting and evaluating brain and body tumors. These compounds combine the advantageous properties of 1-amino-cycloalkyl-1-carboxylic acids, namely, their rapid uptake and prolonged retention in tumors with the properties of halogen substituents, including certain useful halogen isotopes including fluorine-18, iodine-123, iodine-125, iodine-131, bromine-75, bromine-76, bromine-77 and bromine-82. In one aspect, the invention features amino acid compounds that have a high specificity for target sites when administered to a subject in vivo. Preferred amino acid compounds show a target to non-target ratio of at least 5:1, are stable in vivo and substantially localized to target within 1 hour after administration. An especially preferred amino acid compound is ›.sup.18 F!-1-amino-3-fluorocyclobutane-1-carboxylic acid (FACBC). In another aspect, the invention features pharmaceutical compositions comprised of an .alpha.-amino acid moiety attached to either a four, five, or a six member carbon-chain ring. In addition, the invention features analogs of .alpha.-aminoisobutyric acid.

  12. Amino acid analogs for tumor imaging

    DOE Patents [OSTI]

    Goodman, Mark M. (Atlanta, GA); Shoup, Timothy (Decatur, GA)

    1998-10-06T23:59:59.000Z

    The invention provides novel amino acid compounds of use in detecting and evaluating brain and body tumors. These compounds combine the advantageous properties of 1-amino-cycloalkyl-1-carboxylic acids, namely, their rapid uptake and prolonged retention in tumors with the properties of halogen substituents, including certain useful halogen isotopes including fluorine-18, iodine-123, iodine-125, iodine-131, bromine-75, bromine-76, bromine-77 and bromine-82. In one aspect, the invention features amino acid compounds that have a high specificity for target sites when administered to a subject in vivo. Preferred amino acid compounds show a target to non-target ratio of at least 5:1, are stable in vivo and substantially localized to target within 1 hour after administration. An especially preferred amino acid compound is ›.sup.18 F!-1-amino-3-fluorocyclobutane-1-carboxylic acid (FACBC). In another aspect, the invention features pharmaceutical compositions comprised of an .alpha.-amino acid moiety attached to either a four, five, or a six member carbon-chain ring. In addition, the invention features analogs of .alpha.-aminoisobutyric acid.

  13. Synthesis and study of ligands for Pd-catalyzed C-O and C-N coupling

    E-Print Network [OSTI]

    Davis, Nicole R. (Nicole Rose)

    2009-01-01T23:59:59.000Z

    A new ligand, AdBrettPhos, was synthesized and its use, along with tBuBrettPhos, in C-O coupling reactions at low temperatures was investigated. Using Pd catalysts containing these ligands, electron-neutral aryl bromides ...

  14. Molecular modelling and simulation of the surface tension of real quadrupolar fluids

    E-Print Network [OSTI]

    Stephan Werth; Katrin Stöbener; Peter Klein; Karl-Heinz Küfer; Martin Horsch; Hans Hasse

    2014-08-21T23:59:59.000Z

    Molecular modelling and simulation of the surface tension of fluids with force fields is discussed. 29 real fluids are studied, including nitrogen, oxygen, carbon dioxide, carbon monoxide, fluorine, chlorine, bromine, iodine, ethane, ethylene, acetylene, propyne, propylene, propadiene, carbon disulfide, sulfur hexafluoride, and many refrigerants. The fluids are represented by two-centre Lennard-Jones plus point quadrupole models from the literature. These models were adjusted only to experimental data of the vapour pressure and saturated liquid density so that the results for the surface tension are predictions. The deviations between the predictions and experimental data for the surface tension are of the order of 20 percent. The surface tension is usually overestimated by the models. For further improvements, data on the surface tension can be included in the model development. A suitable strategy for this is multi-criteria optimization based on Pareto sets. This is demonstrated using the model for carbon dioxide as an example.

  15. Direct Measurement of the Bubble Nucleation Energy Threshold in a CF3I Bubble Chamber

    E-Print Network [OSTI]

    Behnke, E; Brice, S J; Broemmelsiek, D; Collar, J I; Cooper, P S; Crisler, M; Dahl, C E; Fustin, D; Hall, J; Harnish, C; Levine, I; Lippincott, W H; Moan, T; Nania, T; Neilson, R; Ramberg, E; Robinson, A E; Sonnenschein, A; Vázquez-Jáuregui, E; Rivera, R A; Uplegger, L

    2013-01-01T23:59:59.000Z

    We have directly measured the energy threshold and efficiency for bubble nucleation from iodine recoils in a CF3I bubble chamber in the energy range of interest for a dark matter search. These interactions cannot be probed by standard neutron calibration methods, so we develop a new technique by observing the elastic scattering of 12 GeV/c negative pions. The pions are tracked with a silicon pixel telescope and the reconstructed scattering angle provides a measure of the nuclear recoil kinetic energy. The bubble chamber was operated with a nominal threshold of (13.6+-0.6) keV. Interpretation of the results depends on the response to fluorine and carbon recoils, but in general we find agreement with the predictions of the classical bubble nucleation theory. This measurement confirms the applicability of CF3I as a target for spin-independent dark matter interactions and represents a novel technique for calibration of superheated fluid detectors.

  16. Method oil shale pollutant sorption/NO.sub.x reburning multi-pollutant control

    DOE Patents [OSTI]

    Boardman, Richard D. (Idaho Falls, ID); Carrington, Robert A. (Idaho Falls, ID)

    2008-06-10T23:59:59.000Z

    A method of decreasing pollutants produced in a combustion process. The method comprises combusting coal in a combustion chamber to produce at least one pollutant selected from the group consisting of a nitrogen-containing pollutant, sulfuric acid, sulfur trioxide, carbonyl sulfide, carbon disulfide, chlorine, hydroiodic acid, iodine, hydrofluoric acid, fluorine, hydrobromic acid, bromine, phosphoric acid, phosphorous pentaoxide, elemental mercury, and mercuric chloride. Oil shale particles are introduced into the combustion chamber and are combusted to produce sorbent particulates and a reductant. The at least one pollutant is contacted with at least one of the sorbent particulates and the reductant to decrease an amount of the at least one pollutant in the combustion chamber. The reductant may chemically reduce the at least one pollutant to a benign species. The sorbent particulates may adsorb or absorb the at least one pollutant. A combustion chamber that produces decreased pollutants in a combustion process is also disclosed.

  17. Helix Propensity of Highly Fluorinated Amino Acids Hsien-Po Chiu, Yuta Suzuki, Donald Gullickson, Raheel Ahmad, Bashkim Kokona,

    E-Print Network [OSTI]

    Fairman, Robert

    with fluorocarbon residues is referred to as the fluoro-stabilization effect.1-7 In particular, replacing leucine been attributed to the higher hydrophobicity of the fluorocarbon side chain compared

  18. RAPID COMMUNICATIONS IN MASS SPECTROMETRY, VOL. 7, 693-699 (1993) Collisions of C&*and Cii at Fluorinated and

    E-Print Network [OSTI]

    Wysocki, Vicki H.

    energy is relatively high, typically 12-15% for small molecules.' Thus, if the efficiency of energy & Sons, Ltd. (e.g. masses areater than 200u) strike surfaces." The high relative energy transferRAPID COMMUNICATIONS IN MASS SPECTROMETRY, VOL. 7, 693-699 (1993) Collisions of C&*and Cii

  19. Method of determining the extent to which a nickel structure has been attached by a fluorine-containing gas

    DOE Patents [OSTI]

    Brusie, James P. (Oak Ridge, TN)

    2004-07-13T23:59:59.000Z

    The method of determining the extent to which a nickel structure has been attacked by a halogen containing gas to which it has been exposed which comprises preparing a quantity of water substantially free from dissolved oxygen, passing ammonia gas through a cuprammonium solution to produce ammonia substantially free from oxygen, dissolving said oxygen-free ammonia in said water to produce a saturated aqueous ammonia solution free from uncombined oxygen, treating at least a portion of said nickel structure of predetermined weight with said solution to dissolve nickel compounds from the surface of said structure without dissolving an appreciable amount of said nickel and analyzing the resulting solution to determine the quantity of said nickel compounds that was associated with said said portion of said structure to determine the proportion of combined nickel in said nickel structure.

  20. Method of Determining the Extent to which a Nickel Structure has been Attached by a Fluorine-Containing Gas

    DOE Patents [OSTI]

    Brusie, James P.

    2004-07-13T23:59:59.000Z

    The method of determining the extent to which a nickel structure has been attacked by a halogen containing gas to which it has been exposed which comprises preparing a quantity of water substantially free from dissolved oxygen, passing ammonia gas through a cuprammonium solution to produce ammonia substantially free from oxygen, dissolving said oxygen-free ammonia in said water to produce a saturated aqueous ammonia solution free from uncombined oxygen, treating at least a portion of said nickel structure of predetermined weight with said solution to dissolve nickel compounds from the surface of said structure without dissolving an appreciable amount of said nickel and analyzing the resulting solution to determine the quantity of said nickel compounds that was associated with said said portion of said structure to determine the proportion of combined nickel in said nickel structure.

  1. Oxidative Coupling of ortho-Aminophenols and Anilines for the Application of Labeling Proteins with Fluorine-18

    E-Print Network [OSTI]

    Behrens, Christopher Richard

    2012-01-01T23:59:59.000Z

    was dissolved in acetonitrile at a high concentration thenseparate portions of acetonitrile (2 mL each) and then addedwere dissolved in acetonitrile (0.2 mL) and then diluted

  2. Carrier envelope phase stabilization of a femtosecond laser and iodine spectroscopy 

    E-Print Network [OSTI]

    Zhu, Feng

    2006-10-30T23:59:59.000Z

    The carrier envelope (CE) phase of a femtosecond laser was stabilized. The laser produces an ultra stable comb of frequency spanning the visible region and basically is an optical frequency synthesizer and ready for the frequency domain applications...

  3. Roles of Naturally Occurring Bacteria in Controlling Iodine-129 Mobility in Subsurface Soils 

    E-Print Network [OSTI]

    Li, Hsiu-Ping

    2012-10-19T23:59:59.000Z

    129I is of major concern because of its biophilic nature, excessive inventory, long half-life (~16 million yrs), and high mobility in the natural environment that depends on its chemical speciation. Iodide (I-) has the ...

  4. An evaluation of radio-iodinated human serum albumin in the dog

    E-Print Network [OSTI]

    Hood, David Martin

    1973-01-01T23:59:59.000Z

    of Prinzmetal's indicator-dilution curves much more practicable. This was accomplished by developing methods for the continuous quantitative recording of the arterial time-concentration isotope curves. The technique used by Huff (11) consists... with different isotopes of iodide were used in simultan- eously conducted dilution studies in the dog. The par- ameters of plasma volume and plasma clearance half-times were used for the comparative evaluation of the two radio- pharmaceuticals. Over a six...

  5. Characterizing soil preferential flow using iodine--starch staining experiments and the active region model

    E-Print Network [OSTI]

    Sheng, Feng

    2009-01-01T23:59:59.000Z

    from soil texture; the residual water contents are 0.07 andcorresponding to the residual water content) in the activecorresponding to the residual water content) of the whole

  6. Hyperfine predissociation in the B state of iodine investigated through lifetime measurements of individual hyperfine sublevels

    E-Print Network [OSTI]

    Boyer, Edmond

    . - The dynamics of molecular excited states is an important chapter of present-day molecular physics from the level under investigation following a pulsed excitation of this level. Our laser-excited

  7. Relationship of the serum protein-bound iodine to rates of gain in beef cattle

    E-Print Network [OSTI]

    Stokes, David Kershaw

    1956-01-01T23:59:59.000Z

    to03 Go ?H -P CO HOI PQ Hto01 oto H O to rH O CD... tOO to02to o o Oi01to ?00101 ?01 to H rH 05 O 01 01 to rH tO rH O ? 00toe'? en 00 01*0001to 001 01 ao 05 01 !>?> tOa> 01lO #oto!> IDtoo 01* 00to rH 01 COo ? ID H oo> 0> 05 c?to GO Hto...

  8. Noise spectrum measurements as a means of studying the resistivity of iodine

    E-Print Network [OSTI]

    Barry, Billy Frank

    1964-01-01T23:59:59.000Z

    to maintain props~ electrostatic shic. ldinq and grounding r!ith rogorr! to thc: various comp!. oncnts of the circuit. A. block- dfaprem of the noise measurer ent equipment is sbo~vr in 1'iguro 1. All cot!ponente werc connected by sbiolded coaxial cable...

  9. Earth Planets Space, 54, 265273, 2002 Iodine isotope ratios and halide concentrations in fluids

    E-Print Network [OSTI]

    Fehn, Udo

    is best preserved in the high-temperature fumaroles collected in 1998 and has a 129 I/I ratio of 756 ± 47 recent meteoric water from the fumarolic system after 1993. The acid hot springs on the flanks by mixing with old meteoric water and seawater. Fumarolic gases and hot spring waters were also analyzed

  10. Roles of Naturally Occurring Bacteria in Controlling Iodine-129 Mobility in Subsurface Soils

    E-Print Network [OSTI]

    Li, Hsiu-Ping

    2012-10-19T23:59:59.000Z

    - to reactive intermediates. The aim of this study was to determine the influence of naturally occurring aerobic bacteria isolated from an 129I contaminated aquifer (F-area of the Savannah River Site, SC) on I- oxidation and OI formation. It was demonstrated...

  11. Characterization of an iodine-based ionic liquid ion source and studies on ion fragmentation

    E-Print Network [OSTI]

    Fedkiw, Timothy Peter

    2010-01-01T23:59:59.000Z

    Electrosprays are a well studied source of charged droplets and ions. A specific subclass is the ionic liquid ion source (ILIS), which produce ion beams from the electrostatically stressed meniscus of ionic liquids. ILIS ...

  12. Resistivity of low percentage perylene to iodine complexes and their excess noise spectra

    E-Print Network [OSTI]

    Caruthers, Jerald Wayne

    1966-01-01T23:59:59.000Z

    that pressed prlycrystalline samples and single crystals should yield the same activation energy. & However others have ~btained activation energies nf 1 to 1 . 5 ev i'nr single crystal s. 9 & 3 L511er reports a rapid droop in activation energy from 0. 7... 0. 60 0. 34 0. 13 0. 35 0. 24 Extrinsic 0, 034 0. 034 0. 056 0, 059 (oZ) 240 250 288 Int. 10 3 10 4 0. 2 50 0. 2 106 10 104 10 Table 1. Information Cbtained from Figures e through P, 16 decreasing the gap between them...

  13. IODINE IN THE ENVIRONMENT REVISITED. AN EVALUATION OF THE CHEMICAL-AND PHYSICO CHEMICAL

    E-Print Network [OSTI]

    107 years) has received considerable attention as a byproduct of nuclear energy production. 129 I released to the environment, e.g. by nuclear accidents may be accumulated in the thyroid gland

  14. AKIE YOSHINO AND YOICHI IITAKA 67 thermal vibrations of the iodine atoms were also ob-

    E-Print Network [OSTI]

    Rossmann, Michael G.

    Industries for use of an IBM 7090 computer. References AMIYA, T. (1960). Bull. Chem. Soc. Japan, 33, 1175 PETER MAIN AND MICHAEL G. ROSSMANN Department of Biological Sciences, Purdue University, Lafayette

  15. Capture of Solar and Higher-Energy Neutrinos by Iodine 127

    E-Print Network [OSTI]

    J. Engel; S. Pittel; P. Vogel

    1994-02-17T23:59:59.000Z

    We discuss and improve a recent treatment of the absorption of solar neutrinos by ${}^{127}$I, in connection with a proposed solar neutrino detector. With standard-solar-model fluxes and an in-medium value of -1.0 for the axial-vector coupling constant $g_A$, we obtain a ${}^8$B-neutrino cross section of 3.3$\\times 10^{-42}$, about 50\\% larger than in our previous work, and a ${}^7$Be cross section that is less certain but nevertheless also larger than before. We then apply the improved techniques to higher incoming energies that obtain at the LAMPF beam dump, where an experiment is underway to finalize a calibration of the ${}^{127}$I with electron neutrinos from muon decay. We find that forbidden operators, which play no role in solar-neutrino absorption, contribute nonnegligibly to the LAMPF cross section, and that the preliminary LAMPF mean value is significantly larger than our prediction.

  16. Performance of a Multistream Injection Chemical OxygenIodine Laser with Starlet Ejectors

    E-Print Network [OSTI]

    Carroll, David L.

    and has the potential for higher pressure recovery. Pressures in the singlet-oxygen generator were technology development to date has focused on the singlet-oxygen generator (SOG). The liquid SOG technology- oxygen generation and transport efficiency. The idea of the starlet nozzle concept stems originally from

  17. Interfacing the tandem mirror reactor to the sulfur-iodine process for hydrogen production

    SciTech Connect (OSTI)

    Galloway, T.R.

    1980-06-02T23:59:59.000Z

    The blanket is linked to the H/sub 2/SO/sub 4/ vaporization units and SO/sub 3/ decomposition reactor with either sodium or helium. The engineering and safety problems associated with these choices are discussed. This H/sub 2/SO/sub 4/ step uses about 90% of the TMR heat and is best close-coupled to the nuclear island. The rest of the process we propose to be driven by steam and does not require close-coupling. The sodium loop coupling seems to be preferable at this time. We can operate with a blanket around 1200 K and the SO/sub 3/ decomposer around 1050 K. This configuration offers double-barrier protection between Li-Na and the SO/sub 3/ process gases. Heat pipes offer an attractive alternate to provide an additional barrier, added modularity for increased reliability, and tritium concentration and isolation operations with very little thermal penalty.

  18. The release of actinides, cesium, strontium, technetium, and iodine from spent fuel under unsaturated conditions

    SciTech Connect (OSTI)

    Finn, P.A.; Hoh, J.C.; Wolf, S.F. [and others

    1995-12-31T23:59:59.000Z

    Drip tests to measure radionuclide release from spent nuclear fuel are being performed at 90{degrees}C at a drip rate of 0.75 mL/3.5 days; the test conditions are designed to simulate the behavior of spent fuel under the unsaturated and oxidizing conditions expected in the potential repository at Yucca Mountain. This paper presents measurements of the actinide, {sup 137}Cs, {sup 90}Sr, {sup 99}Tc, and {sup 129}I contents in the leachates after 581 days of testing at 90{degrees}C. These values provide an estimate of the source term for the long-lived radionuclide release under these test conditions. Comparisons are made between our results and those of other researchers.

  19. Tritium And Iodine Plumes on the U.S. Department of Energy Hanford Site

    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:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron Spin Transition in2,EHSS A-Z SiteManhattan ProjectMay 29, 2014 Online

  20. Tritium And Iodine Plumes on the U.S. Department of Energy Hanford Site

    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:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron Spin Transition in2,EHSS A-Z SiteManhattan ProjectMay 29, 2014

  1. Direct vapor/solid synthesis of mercuric iodide using compounds of mercury and iodine

    SciTech Connect (OSTI)

    Skinner, Nathan L. (Carpinteria, CA)

    1990-01-01T23:59:59.000Z

    A process is disclosed for producing high purity mercuric iodide by passing a gaseous source of a mercuric compound through a particulate bed of a low vapor pressure iodide compound which is maintained at an elevated temperature which is the lower of either: (a) just below the melting or volatilization temperature of the iodide compound (which ever is lower); or (b) just below the volatilization point of the other reaction product formed during the reaction; to cause the mercuric compound to react with the iodide compound to form mercuric iodide which then passes as a vapor out of the bed into a cooler condensation region.

  2. Carrier envelope phase stabilization of a femtosecond laser and iodine spectroscopy

    E-Print Network [OSTI]

    Zhu, Feng

    2006-10-30T23:59:59.000Z

    . In this context, the CW stability of the Ti:sapphire laser is discussed to provide a procedure for the femtosecond laser adjustments. In addition, the pulse trains emitted by the femtosecond laser are described analytically to provide a theoretical basis...

  3. Efforts to Consolidate Chalcogels with Adsorbed Iodine | SciTech Connect

    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 Power AdministrationField Campaign:INEAWater Use Goal 4: Efficient Water Use &Efforts to

  4. Iodine solubility in a low-activity waste borosilicate glass at 1000°C

    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. DOE Office of Science (SC)Integrated Codes | NationalCurriculum IntroductionInvestor andPublicTank

  5. Iodine valence and local environments in borosilicate waste glasses using X-ray absorption spectroscopy

    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. DOE Office of Science (SC)Integrated Codes | NationalCurriculum IntroductionInvestor andPublicTankvalence

  6. Assessment of Methods to Consolidate Iodine-Loaded Silver-Functionalized

    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. DOE Office511041cloth DocumentationProductsAlternativeOperational Management »EnergyHubs |B -

  7. Novel 125 I production and recovery system

    E-Print Network [OSTI]

    Kar, Adwitiya

    2009-05-15T23:59:59.000Z

    This research suggests ways of reducing contamination of iodine-126 in iodine-125 and lays out a simpler iodine-125 production technique to increase the yield. By using aluminum irradiation vessels the yield of iodine-125 produced by neutron...

  8. annealing temperature effects: Topics by E-print Network

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

    University of 10 Paper The Effect of High Temperature Annealing on Fluorine Distribution Profile and Electro-Physical Properties of Thin Gate Oxide Fluorinated by Silicon...

  9. annealing temperature effect: Topics by E-print Network

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

    University of 10 Paper The Effect of High Temperature Annealing on Fluorine Distribution Profile and Electro-Physical Properties of Thin Gate Oxide Fluorinated by Silicon...

  10. J. Sep. Sci. 2005, 28, 155162 www.jss-journal.de i 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim OriginalPaper

    E-Print Network [OSTI]

    Lebendiker, Mario

    [bis(pyridin-2-ylmethyl)amino]propan-2-olato dizinc(II) complex (Phos-tag), which is linked to a highly cross of pro- teins, such as phosphorylation, glycosylation, methyla- tion, and acetylation, dramatically

  11. Quantitative Analysis of Phosphotyrosine Signaling Networks Triggered by CD3 and CD28 Costimulation in Jurkat Cells1

    E-Print Network [OSTI]

    two phosphotyrosine sites in the ITAM motif (ITAM; YxxI/L) with the exception of the -chain, which with phos- phorylated ITAM in the -chain and LAT, which interacts with other adaptor molecules such as Vav-1

  12. A novel laboratory scale method for studying heat treatment of cake flour

    E-Print Network [OSTI]

    Chesterton, A. K. S.; Wilson, D. I.; Sadd, P. I.; Moggridge, G. D.

    2014-07-25T23:59:59.000Z

    *, ThermPhos International 172 BV, UK) and emulsifier (propylene glycol monostearate and monoglyceride, Advitagel Food 173 8 Ltd., UK) were supplied by Premier Foods (High Wycombe, UK). Caster sugar, whole liquid 174 eggs and salt were purchased...

  13. The effect of 2 mMol glutamine supplementation on HSP70 and TNF-a release by LPS stimulated blood from healthy children

    E-Print Network [OSTI]

    Marino, L.V.; Pathan, N.; Meyer, R.; Wright, V.J.; Habibi, P.

    2014-12-23T23:59:59.000Z

    the efficiency of the mitochondrial respiratory chain contributing to the bioenergetics failure of the mitochondria (a feature of critical illness), where engorged mitochondria are not able to meet adenosine tri phos- phate demands of tissues, resulting in cell...

  14. active binuclear palladium: Topics by E-print Network

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

    TangPhos ligand was found Zhang, Xumu 58 Exchange Interaction in Binuclear Complexes with Rare Earth and Copper Ions: A Many-Body Model Study CiteSeer Summary: We have used a...

  15. The Transuranium Elements

    E-Print Network [OSTI]

    Hyde, Earl K.; Seaborg, Glenn T.

    1956-01-01T23:59:59.000Z

    uranium hexa- fluoride, can be made by the reaction of pure gaseous fluorine on plutonium tetrafluoride

  16. Life Cycle Inventory of a CMOS Chip

    E-Print Network [OSTI]

    Boyd, Sarah; Dornfeld, David; Krishnan, Nikhil

    2006-01-01T23:59:59.000Z

    in the facility house scrubber and acid waste neutralizationchemical purification, house scrubber, AWN and fluorine and

  17. A New Approach to Designing the Optimum Acid Treatment for Sandstone Reservoirs

    E-Print Network [OSTI]

    Abdelmoneim Mahmoud, Sherif

    2014-08-08T23:59:59.000Z

    , and Fe3O4. The presence of iron oxides in the formation will result in fluorinated complexes ( ( ) , where 1 fluorine complexes applies... only to relatively clean sandstones. In the presence of clays, the dissolved aluminum ions have a greater affinity for fluorine than iron does. Therefore, the iron fluorine complexes do not form and iron hydroxide still precipitates at pH levels...

  18. Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@inp-toulouse.fr

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    in lithium batteries [2, 3] and as solid lubricants [4­6]. The fluorination of graphite is also possible Fluorinated Graphite Heat- Treated Under Fluorine Atmosphere. (2010) Tribology Letters, vol. 37 (n° 1). pp. 31-41" DOI : 10.1007/s11249-009-9487-6 #12;Tribological Properties of Room Temperature Fluorinated Graphite

  19. Synthesis and use of (polyfluoroaryl)fluoroanions of aluminum, gallium and indium

    DOE Patents [OSTI]

    Marks, Tobin J. (Evanston, IL); Chen, You-Xian (Midland, MI)

    2000-01-01T23:59:59.000Z

    Salts of (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium are described. The (polyfluoroaryl)fluoroanions have the formula [ER'R"R'"F].sup..crclbar. wherein E is aluminum, gallium, or indium, wherein F is fluorine, and wherein R', R", and R'" is each a fluorinated phenyl, fluorinated biphenyl, or fluorinated polycyclic group.

  20. Iodine-125-labeled lipoprotein lipase as a tool to detect and study spontaneous lipolysis in bovine milk

    SciTech Connect (OSTI)

    Sundheim, G.; Bengtsson-Olivecrona, G.

    1986-07-01T23:59:59.000Z

    The distribution of lipoprotein lipase among cream, casein, and milk serum can be evaluated by addition of a trace amount of /sup 125/I-labeled lipoprotein lipase to milk. Radioactive lipase was distributed in parallel to endogenous lipase under several conditions. In some milk samples, binding of lipase to cream increased when the milk was cooled. Correlation was good between bound labeled lipase and degree of cold-induced lipolysis in corresponding milk samples. Binding of lipase to cream or to casein was not saturable by addition of two-to threefold more lipase than is normally present in milk. In milk with a relatively high fraction of lipase bound to cream, a correspondingly lower fraction was associated with casein, whereas the fraction of lipase in milk serum was similar in all milk samples. Cold-induced binding of lipoprotein lipase to cream was not fully reversed when the milk was warmed again. Heparin released lipase from casein and increased the amount of lipase bound to cream after cooling.

  1. 129 Iodine: A New Hydrologic Tracer for Aquifer Recharge Conditions Influenced by River Flow Rate and Evapotranspiration

    E-Print Network [OSTI]

    Schwehr, K. A.; Santschi, P. H.; Moran, J. E.

    2003-01-01T23:59:59.000Z

    County using boron isotopes and general geochemistry, In Lawrence Livermore National Laboratory UCRL-ID-133529 (pp. 44). ? Davisson, M.L., Hudson, G.B., Herndon, R., & Woodside, G. (1999b). Report on isotope tracer investigations in the Forebay... of the Orange County Groundwater Basin: Fiscal years 1996 and 1997, In Lawrence Livermore National Laboratory UCRL-ID- 133531 (pp. 44). ? Dissanayake, C.B. & Chandrajith, R. (1999). Medical geochemistry of tropical environments. Earth-Science Reviews 47, 219...

  2. The effect of vitamin B 12 and various levels of iodine in the diet of growing chicks and mature hens

    E-Print Network [OSTI]

    Banta, Edward Mack

    1957-01-01T23:59:59.000Z

    giaeral miatwre+) Vitaaia NiatareO ) SS, O S0, 0 1 0 (1)maideatified Srewth fetor so~oes ~ed were as followsi (1) Cried hrewers yeast, (S) Cried Ciatillera soluhlee, (S) alfalfa aa4 (4) Cried delaetoeed whey. (S)The siaerals aa4 levels scc...

  3. Absolute frequency measurement of the iodine-stabilized Ar+ at 514.6 nm using a femtosecond optical frequency comb.

    E-Print Network [OSTI]

    Boyer, Edmond

    Hz higher than the value of 582490603.38(15) MHz, adopted by the CIPM in 2003 [T.J. Quinn, Metrologia 40

  4. Ab initio potential energy curves of the valence, Rydberg, and ion-pair states of iodine monochloride, ICl

    SciTech Connect (OSTI)

    Kalemos, Apostolos, E-mail: kalemos@chem.uoa.gr [Laboratory of Physical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens 15771 (Greece); Prosmiti, Rita [Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas, (IFF-CSIC), Serrano 123, 28006 Madrid (Spain)

    2014-09-14T23:59:59.000Z

    We present for the first time a coherent ab initio study of 39 states of valence, Rydberg, and ion-pair character of the diatomic interhalogen ICl species through large scale multireference variational methods including spin-orbit effects coupled with quantitative basis sets. Various avoided crossings are responsible for a non-adiabatic behaviour creating a wonderful vista for its theoretical description. Our molecular constants are compared with all available experimental data with the aim to assist experimentalists especially in the high energy regime of up to ?95?000 cm{sup ?1}.

  5. A study of the reactions related to the catalytic decomposition of hydrogen peroxide by the iodate-iodine couple

    E-Print Network [OSTI]

    Simic, Radmilo

    1970-01-01T23:59:59.000Z

    has 0 been studied from 1G to 50 C, and the temperature coef- ficient was found to be 2. 3 per 10 C, the activation 0 energy being 15. 6 keel/mole. The rate was measured by following oxygen evolution from the mixtures saturated witn respect... - -2. 2x1D was in accord with his 3 previous conclusion. A rate law for Reaction 2 was first proposed by 5 6, 7 Dushman. Abel and co-workers, ' in a revision of Dushman's work, have shown that the rate law is (4) -d [1051f'dt Ftdd 1 Ft ]F" 1 [kdf...

  6. Urinary Metabolomic Analysis to Detect Changes After Intravenous, Non-ionic, Low Osmolar Iodinated Radiocontrast for Computerized Tomographic Imaging

    E-Print Network [OSTI]

    Diercks, Deborah B; Owen, Kelly P; Tolstikov, Vladimir; Sutter, Mark E; Kline, Jeffrey A

    2014-01-01T23:59:59.000Z

    Acad Radiol. after percutaneous coronary intervention and adialysis after percutaneous coronary intervention and theafter percutaneous coronary intervention: development and

  7. Iodine Pathways and Off-Gas Stream Characteristics for Aqueous Reprocessing Plants – A Literature Survey and Assessment

    SciTech Connect (OSTI)

    R. T. Jubin; D. M. Strachan; N. R. Soelberg

    2013-09-01T23:59:59.000Z

    Used nuclear fuel is currently being reprocessed in only a few countries, notably France, England, Japan, and Russia. The need to control emissions of the gaseous radionuclides to the air during nuclear fuel reprocessing has already been reported for the entire plant. But since the gaseous radionuclides can partition to various different reprocessing off-gas streams, for example, from the head end, dissolver, vessel, cell, and melter, an understanding of each of these streams is critical. These off-gas streams have different flow rates and compositions and could have different gaseous radionuclide control requirements, depending on how the gaseous radionuclides partition. This report reviews the available literature to summarize specific engineering data on the flow rates, forms of the volatile radionuclides in off-gas streams, distributions of these radionuclides in these streams, and temperatures of these streams. This document contains an extensive bibliography of the information contained in the open literature.

  8. The level of serum protein-bound iodine, its repeatability and relationship to rate of gain in immature beef cattle

    E-Print Network [OSTI]

    Green, George G.

    1958-01-01T23:59:59.000Z

    $dok*'h*df' fw0 Kxkufwokf' tl''x$x lm Wxyfs ow ;fdhof' m*'mo'',xwh lm hux dx\\*odx,xwh mld hux 0x$dxx lm SOtWOA Oa NrLcOMONre n*$*shi >?R? Kf3ld M*H3xkhs nDLKnc DCWALWLOD WrE cE.Ec Oa MEACK NAOWELDGTOCDS LOSLDEi LWM AENEnWnTLcLWe nDS AEcnWLODMrLN WO AnWE Oa... pnLD LD LKKnWCAE TEEa tnWWcE n Sossxdhfholw Tg pEOApE p: pAEED n;;dlJx0 fs hl shg'x fw0 klwhxwh HgP ?tufod,fw lm tl,,ohhxxV ?rxf0 lm Sx;fdh,xwhV n*$*shi >?R? ACKNOWLEDGMENTS Sincere appreciation is expressed to the following: Dr* H, 0 o Kunke...

  9. A study of the reactions related to the catalytic decomposition of hydrogen peroxide by the iodate-iodine couple 

    E-Print Network [OSTI]

    Simic, Radmilo

    1970-01-01T23:59:59.000Z

    has 0 been studied from 1G to 50 C, and the temperature coef- ficient was found to be 2. 3 per 10 C, the activation 0 energy being 15. 6 keel/mole. The rate was measured by following oxygen evolution from the mixtures saturated witn respect... - -2. 2x1D was in accord with his 3 previous conclusion. A rate law for Reaction 2 was first proposed by 5 6, 7 Dushman. Abel and co-workers, ' in a revision of Dushman's work, have shown that the rate law is (4) -d [1051f'dt Ftdd 1 Ft ]F" 1 [kdf...

  10. The influence of iodinated casein and high fat diets on the performance and incidence of fatty livers in laying hens 

    E-Print Network [OSTI]

    Young, Louis Lee

    1967-01-01T23:59:59.000Z

    /56) concluded that energy level at a given protein level was more important to feed efficiency than the calorie/protein ratio. Hac- Intyre and Aitken (1)57) upported this conclusion and calculated th &t a reduction in. the caloric value of a feed. by 100... d. epressed but only to 1681 grams. Thi" pattern may be related to the birds' daily caloric intake relative to their daily caloric requirement. The birds fed diet 2 consumed only about fi re more Calories per dav than the birds i'ed the basal...

  11. Optimization of a fluorine-free metal-organic deposition to fabricate BaZrO film on RABiTS substrates

    E-Print Network [OSTI]

    ] for CCs [3]. 1 Present address: Department of Physics and Astronomy, Texas A&M University, College Station and substrates used for other MOD YBCO film deposition techniques, so it is a potential alternative for scaling

  12. New calorimetric studies of inorganic fluorine compounds. [Silver uranium fluoride, AgUF/sub 6/; cesium fluoroxysulfate, CsSO/sub 4/F

    SciTech Connect (OSTI)

    O'Hare, P.A.G.; Flotow, H.E.; Appleman, E.H.; Malm, J.G.

    1982-04-01T23:59:59.000Z

    In this paper, recently determined enthalpies of formation are presented for two fluorides, silver(I) uranium(V) fluoride, AgUF/sub 6/, and cesium fluoroxysulfate, CsSO/sub 4/F. In addition the derivation of entropy is presented for CsSO/sub 4/F.

  13. Photofragmentation spectra of halogenated methanes in the VUV photon energy range

    SciTech Connect (OSTI)

    Cartoni, Antonella, E-mail: antonella.cartoni@uniroma1.it [Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le Aldo Moro 5, Roma 00185 (Italy)] [Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le Aldo Moro 5, Roma 00185 (Italy); Bolognesi, Paola; Fainelli, Ettore; Avaldi, Lorenzo [CNR-IMIP, Area della Ricerca di Roma 1, Monterotondo Scalo (Rm) 00015 (Italy)] [CNR-IMIP, Area della Ricerca di Roma 1, Monterotondo Scalo (Rm) 00015 (Italy)

    2014-05-14T23:59:59.000Z

    In this paper an investigation of the photofragmentation of dihalomethanes CH{sub 2}X{sub 2} (X = F, Cl, Br, I) and chlorinated methanes (CH{sub n}Cl{sub 4?n} with n = 0–3) with VUV helium, neon, and argon discharge lamps is reported and the role played by the different halogen atoms is discussed. Halogenated methanes are a class of molecules used in several fields of chemistry and the study of their physical and chemical proprieties is of fundamental interest. In particular their photodissociation and photoionization are of great importance since the decomposition of these compounds in the atmosphere strongly affects the environment. The results of the present work show that the halogen-loss is the predominant fragmentation channel for these molecules in the VUV photon energy range and confirm their role as reservoir of chlorine, bromine, and iodine atoms in the atmosphere. Moreover, the results highlight the peculiar feature of CH{sub 2}F{sub 2} as a source of both fluorine and hydrogen atoms and the characteristic formation of I{sub 2}{sup +} and CH{sub 2}{sup +} ions from the photofragmentation of the CH{sub 2}I{sub 2} molecule.

  14. Final Report for "Boron and Tin in Nuclear Medicien: The Development of Reactive Solid-State Reagents for PET and SPECT

    SciTech Connect (OSTI)

    George W. Kabalka

    2006-01-13T23:59:59.000Z

    The research program was directed at the use of functionalized organometallic reagents that would rapidly react with radiolabeled agents generated by a medical cyclotron or reactor. The radioisotopes included fluorine-18, oxgygen-15, nitrogen-13, carbon-11 and iodine-123; all short lived nuclides of importantce in nuclear medicine imaging studies utilizing emission tomography techniques. The early studies led to the development of extensive new isotope incorporation chemistry. These studies validated the feasibility of using reactive intermediates, such as the organoboranes, and acted as a catalyst for others to investigate organometallic agents based on mercury, tin, and silicon. A large number of radiolabeling techniques and radiopharmaceuticals were developed. These included agents for use in oncology, neurology, and metabolism. The research resulted in the generation of one hundred and one journal articles, eighty seven refereed published abstracts and forty one invited lectures. Thirteen postdoctoral students, fourteen graduate students, and twenty eight undergraduate students were trained in the scientific aspects of nuclear medicine imaging under the asupices of this grant.

  15. INCOMPATIBILITY OF COMMON LABORATORY CHEMICALS When certain hazardous chemicals are stored or mixed together, violent reactions may occur because the chemicals are

    E-Print Network [OSTI]

    Cho, Junghyun

    metals acids, chromium, ethylene, halogens, hydrogen, mercury, earth nitrogen, oxidizers, plastics, ethylene, fluorine, hydrogen, ketones (acetone, carbonyls, etc.), metals, sulfur #12;Calcium oxide acids, ethanol, fluorine, organic materials Carbon (activated) alkali metals, calcium hypochlorite, halogens

  16. Development of novel transition metal-catalyzed cross-coupling reactions and applications thereof

    E-Print Network [OSTI]

    Teverovskiy, Georgiy

    2013-01-01T23:59:59.000Z

    Chapter 1 The first example of Pd(0)/(II) catalyzed fluorination of aryl bromides is reported herein. Based on these data, an analogous method was developed for the fluorination of aryl triflates. The reaction proceeds ...

  17. CX-012554: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Electrochemical Fluorination in Molten Fluoride Salts and Detection of Fluorinated Species CX(s) Applied: B3.6Date: 41879 Location(s): South CarolinaOffices(s): Savannah River Operations Office

  18. First-principles studies of carbon nanostructures and spin-phonon and electron-phonon coupling in solids

    E-Print Network [OSTI]

    Chan, Kevin Timothy

    2012-01-01T23:59:59.000Z

    diffusion on graphene [182] and fluorine chemical bonding [diffusion barrier are well correlated with atomic radius. For ionic bonding,

  19. Synthesis and structure of perfluorocongressane

    SciTech Connect (OSTI)

    Wei, Han-Chao; Corbelin, S.; Lagow, R.J. [Univ. of Texas, Austin, TX (United States)] [Univ. of Texas, Austin, TX (United States)

    1996-03-08T23:59:59.000Z

    The direct fluorination of inorganic, organometallic and organic compounds, employing the LaMar method, has impacted the synthesis of structurally unusual fluorinated compounds over the past 25 years. Perfluorocongressane was synthesized using elemental fluorine and characterized by mass spectra, {sup 19}F NMR, and X-ray crystallography. 1 fig., 1 tab.

  20. Assembly and Physico-Chemical Properties of Polyelectrolyte Multilayer Films Co-Assembled with Guest Species

    E-Print Network [OSTI]

    Huang, Xiayun

    2014-08-19T23:59:59.000Z

    ................................................................................................. 39 3.3.1. Counterion exchange with fluorinated surfactant .................................................... 39 3.3.2. Fluorinated surfactant co-assembled with polyelectrolytes ..................................... 46 3.4. Summary...Cl concentration in the assembly exceeds 200 mmol/L, the fraction of fluorinated groups on the PEM surface reaches approximately 90%........................................................................................................... 43 Figure 3...

  1. 1150 IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 39, NO. 9, SEPTEMBER 2003 Modeling of the ElectriCOIL System

    E-Print Network [OSTI]

    Carroll, David L.

    ) Traditionally, this pumping reaction is fed by a liquid chem- istry singlet oxygen generator (SOG). However discharge oxygen-iodine laser (ElectriCOIL) system. Results of those studies along with more recent Terms--Chemical oxygen-iodine laser, chemical oxygen- iodine laser (COIL), discharge oxygen-iodine laser

  2. Physical features of small disperse coal dust fraction transportation and structurization processes in iodine air filters of absorption type in ventilation systems at nuclear power plants

    E-Print Network [OSTI]

    Ledenyov, Oleg P; Poltinin, P Ya; Fedorova, L I

    2012-01-01T23:59:59.000Z

    The research on the physical features of transportation and structurization processes by the air-dust aerosol in the granular filtering medium with the cylindrical coal adsorbent granules in an air filter of the adsorption type in the heating ventilation and cooling (HVAC) system at the nuclear power plant is completed. The physical origins of the coal dust masses distribution along the absorber with the granular filtering medium with the cylindrical coal granules during the air-dust aerosol intake process in the near the surface layer of absorber are researched. The quantitative technical characteristics of air filtering elements, which have to be considered during the optimization of air filters designs for the application in the ventilation systems at the nuclear power plants, are obtained.

  3. Bromine and iodine chemistry in a global chemistry-climate model: description and evaluation of very short-lived oceanic sources

    E-Print Network [OSTI]

    2012-01-01T23:59:59.000Z

    B. , Hebestreit, K. , and Platt, U. : Short-lived alkylA. , Winterlik, J. , and Platt, U. : Reactive and organic

  4. Effects of Iodine Content in the Electrolyte on the Charge Transfer and Power Conversion Efficiency of Dye-Sensitized Solar Cells under

    E-Print Network [OSTI]

    Cao, Guozhong

    of Dye-Sensitized Solar Cells under Low Light Intensities Jo-Lin Lan, Tzu-Chien Wei,*, Shien-Ping Feng of dye-sensitized solar cells under lower light intensities. By analyzing the current-voltage behavior results in an exclusive application for indoor use. 1. INTRODUCTION Dye-sensitized solar cell (DSSC) has

  5. www.sciencemag.org SCIENCE VOL 324 19 JUNE 2009 1519 POLICYFORUM

    E-Print Network [OSTI]

    David, Mark B.

    nutrients extracted in crop harvest (7). For example, on the 90 small- holder farms sampled in the Siaya within, as well as across, agricultural systems. Harvested crops remove nitrogen, phos- phorus, and other, including the degradation of downstream water quality and eutrophication of coastal marine ecosys- tems

  6. Assaying Phospholipase A2 Activity Christina C. Leslie and Michael H. Gelb

    E-Print Network [OSTI]

    Gelb, Michael

    the hydrolysis of sn-2 fatty acid from membrane phospholipid. Assays are described for measuring the activity measuring the calcium-dependent re- lease of radiolabeled sn-2 arachidonic acid from small unilamellar cal- cium-dependent formation of albumin-bound pyrene fatty acid from the sn-2 position of phos

  7. Effects of Phosphate Rock on Sequential Chemical Extraction of Lead in Contaminated Soils

    E-Print Network [OSTI]

    Ma, Lena

    the organic or the residual fraction and water-solubleand the exchangeable-Mn oxide, and organic fractions (collectively the non- residual fraction) to the residual fraction, thus fractions to the residual fraction suggests that phos- phate rock has potential for in-situ immobilization

  8. TL1A induces the expression of TGF-b-inducible gene h3 (big-h3) through PKC, PI3K, and ERK in THP-1 cells

    E-Print Network [OSTI]

    Lee, Won-Ha

    TL1A induces the expression of TGF-b-inducible gene h3 (big-h3) through PKC, PI3K, and ERK in THP-1 of protein kinase C (PKC), extracellular signal-regulated kinase (ERK), phosphoinositide kinase-3 (PI3K blocked the phos- phorylation of AKT without affecting ERK phosphorylation. On the other hand, suppression

  9. 791THE DEPARTMENT OF CHEMISTRY, ETH ZRICH, IN THE NEW HNGGERBERG BUILDINGS CHIMIA 2001, 55, No. 10

    E-Print Network [OSTI]

    Sandoghdar, Vahid

    3 and H2S, respectively. In industry, Co- or Ni-promoted MoS2-type phases, supported on -Al2O3 phos- phides are model systems for hydrodeni- trogenation; the removal of nitrogen at- oms from as Hydrodenitrogenation Catalysts The catalytic removal of nitrogen (hydrodenitrogenation) and sulfur (hydro

  10. Mesostructures DOI: 10.1002/anie.201310748

    E-Print Network [OSTI]

    Ihee, Hyotcherl

    functionalized with organic groups that can form tight bonding to inorganic species. Such polymers were able analogues (AlPO4 and other related metal phos- phates with open frameworks), titanium dioxide (TiO2. The incorporation of mesoporosity into these materials has been an important issue for resolving the diffusion

  11. The influence of phosphorus nutrition and water stress on the osmotic adjustment and growth of loblolly pine

    E-Print Network [OSTI]

    Wilson, Alan Byron

    1985-01-01T23:59:59.000Z

    LITERATURE REVIEW Water Stress Osmotic Adjustment Phosphorus MATERIALS AND METHODS Experimental Design Sowing Preparation Sowing and Seedling Cultivation Treatments . . . . . . . ~ Measurements . . . . . . - ~ ~ ~ Statistical Analysis RESULTS... three days. Fertilizer was applied every other time the seedlings received water. Treatments were initiated to provide three levels of phos- phorus nutrition (10, 100, 200 ppm) and three levels of water stress. Water stress was imposed...

  12. Bid Ceil (1996) 87, 143-147 0 Elsevier. Paris

    E-Print Network [OSTI]

    Olins, Ada L.

    1996-01-01T23:59:59.000Z

    stained in a non-Feulgen procedure with osmium annnine-B and imaged at several electron energy the distribution of nucleic acid phos- phorus. osmium ammine-B / energy filtered TEM / RNA / phosphorus mapping- proteins;hnRNP, heterogeneous nuclear RNP. (BR) granules [12, 14, 151. The advantage of employing ES1

  13. A Lipid-modified Phosphoinositide-specific Phospholipase C (TcPI-PLC) Is Involved in Differentiation of Trypomastigotes to

    E-Print Network [OSTI]

    Singer, Randall

    A Lipid-modified Phosphoinositide-specific Phospholipase C (TcPI-PLC) Is Involved C (PI- PLC) is an important component of the inositol phos- phate/diacylglycerol signaling pathway. A newly discov- ered Trypanosoma cruzi PI-PLC (TcPI-PLC) is lipid modified in its N terminus, targeted

  14. Eos, Vol. 93, No. 41, 9 October 2012 2012. American Geophysical Union. All Rights Reserved.

    E-Print Network [OSTI]

    Paytan, Adina

    Phos 2012, a conference dedicated to cutting-edge research on phosphorus, was held in the Centro Stefano was sponsored by Cen- tro Stefano Franscini, Swiss National Foun- dation, the U.S. National Science Founda- tion Tracers for a Better Understanding of the Phosphorus Cycle; Monte Verità, Switzerland, 24­29 June 2012 #12;

  15. REGULAR PAPER Modulation of the fluorescence yield in heliobacterial cells

    E-Print Network [OSTI]

    . They are thought to use a light-driven cyclic electron transport pathway to pump protons, and thereby phos brief flashes is inversely correlated to the variable fluorescence. Using pump-probe spectros- copy), or conversion to heat. When photosynthetic systems are operating efficiently, photochemistry dominates

  16. Nuclear medicine program progress report for quarter ending June 30, 1994

    SciTech Connect (OSTI)

    Knapp, F.F. Jr.; Ambrose, K.R.; Beets, A.L.; Lambert, C.R.; McPherson, D.W.; Mirzadeh, S.; Luo, H.

    1994-08-01T23:59:59.000Z

    In this report we describe tile first successful synthesis and in vivo evaluation of a fluorinated analogue of the IQNP muscarinic-cholinergic receptor ligand. Unanticipated synthetic hurdles lead to several unsuccessful approaches before the synthesis of a model compound was achieved. The successful route involved introduction of the fluoroethyl moiety at an early stage of the synthesis by alkylation of ethyl 1,3-dithiane-2-carboxylate with 1-fluoro-2-bromoethane. Subsequent unmasking of the carbonyl, followed by introduction of the phenyl group with phenylmagnesium bromide and subsequent transesterification with racemic quinuclidinol afforded the target compound, 1-azabicyclo[2.2.2]oct-3-yl {alpha}-(1-fluoroethan-2-yl)-{alpha}-hydroxy-{alpha}-phenylacetate (QNF). Pretreatment of Fisher rats with QNF one hour prior to the intravenous administration of the [I-131]-Z-(R,R) IQNP isomer demonstrated that the new fluoro analogue blocked uptake of iodine-131 in those regions of the brain rich in muscarinic-cholinergic receptors measured three hours after injection. As an example, the control values for group of nontreated animals were (5 animals; mean {+-} SD): cortex, 1.20{+-}0.27; striatum, 0.73{+-}0.19; pons, 0.70{+-}0.20; cerebellum, 0.43{+-}0.114. Brains from animals pretreated with the fluoro analogue had the following values (mean{+-}SD; % decrease): cortex, 0.67{+-}0.15 (65%); striatum, 0.35{+-}0.114 (52%); pons, 0.40{+-}0.08 (43%); cerebellum, 0.16{+-}0.09(63%). Also during this period several tungsten-188/rhenium-188 generators and tin-117m samples were provided for collaborative studies.

  17. Process and composition for drying of gaseous hydrogen halides

    DOE Patents [OSTI]

    Tom, Glenn M. (New Milford, CT); Brown, Duncan W. (Wilton, CT)

    1989-08-01T23:59:59.000Z

    A process for drying a gaseous hydrogen halide of the formula HX, wherein X is selected from the group consisting of bromine, chlorine, fluorine, and iodine, to remove water impurity therefrom, comprising: contacting the water impurity-containing gaseous hydrogen halide with a scavenger including a support having associated therewith one or more members of the group consisting of: (a) an active scavenging moiety selected from one or more members of the group consisting of: (i) metal halide compounds dispersed in the support, of the formula MX.sub.y ; and (ii) metal halide pendant functional groups of the formula -MX.sub.y-1 covalently bonded to the support, wherein M is a y-valent metal, and y is an integer whose value is from 1 to 3; (b) corresponding partially or fully alkylated compounds and/or pendant functional groups, of the metal halide compounds and/or pendant functional groups of (a); wherein the alkylated compounds and/or pendant functional groups, when present, are reactive with the gaseous hydrogen halide to form the corresponding halide compounds and/or pendant functional groups of (a); and M being selected such that the heat of formation, .DELTA.H.sub.f of its hydrated halide, MX.sub.y.(H.sub.2 O).sub.n, is governed by the relationship: .DELTA.H.sub.f .gtoreq.n.times.10.1 kilocalories/mole of such hydrated halide compound wherein n is the number of water molecules bound to the metal halide in the metal halide hydrate. Also disclosed is an appertaining scavenger composition and a contacting apparatus wherein the scavenger is deployed in a bed for contacting with the water impurity-containing gaseous hydrogen halide.

  18. 74Exploring Nuclear Decay and Radiation Dose The devastating earthquake

    E-Print Network [OSTI]

    and fall to the ground, contaminating the soil. Cesium-137 has a half-life of 30 years, while Iodine-131 in the vented gases are Cesium-137 and Iodine-131. These will become incorporated into atmospheric dust grains

  19. Effect of Water on the Electrochemical Oxidation of Gas-Phase SO2 in a PEM Electrolyzer for H2 Production

    E-Print Network [OSTI]

    Weidner, John W.

    for Electrochemical Engineering, Department of Chemical Engineering, University of South Carolina, Columbia, South solution and concurrent decom- position to iodine is the most difficult processing issue for the iodine

  20. Microchemical systems for singlet oxygen generation

    E-Print Network [OSTI]

    Hill, Tyrone F. (Tyrone Frank), 1980-

    2008-01-01T23:59:59.000Z

    Chemical Oxygen-Iodine Lasers (COIL) are a technology of interest for industrial and military audiences. COILs are flowing gas lasers where the gain medium of iodine atoms is collisionally pumped by singlet delta oxygen ...

  1. Apple Maturity Protocol Tests for apple flesh firmness and starch conversion are important tools for monitoring crop

    E-Print Network [OSTI]

    liter of iodine solution. Store iodine solution in an amber bottle (photographic supply type) or a glass bottle with aluminum foil wrapper. The cap should be non metallic, as the solution will disintegrate

  2. Department of Earth Sciences Syracuse University

    E-Print Network [OSTI]

    Segraves, Kari A.

    in Gas Hydrate Fields: Implications for the Transport of Iodine and Methane in Active Margins" Advisor, Comparison of iodine dates from mud volcanoes and gas hydrate occurrences: relevance for the movement Waters from the Gas Hydrate Occurrence Offshore

  3. Studies on phosphorus availability in poultry rations

    E-Print Network [OSTI]

    Baruah, Jogendra Nath

    1959-01-01T23:59:59.000Z

    with colloidal phosphate32 Table VII.Comparative availability of phosphorus from different sources by microbiological and chick assay procedures............. 33 Table VIH.Effect of fluorine from NaF and Cal^ on growth, bone ash and feed efficiency of chicks... cent resulted in a depression in growth, which was attributed to the 3? 52 per cent fluorine present in the supple? ment. Buckner (1929) found that rock phosphate contained sufficient fluorine to be detrimental to the early growth of chicks, although...

  4. MATERIALS AND MOLECULAR RESEARCH DIVISION Annual Report 1977.

    E-Print Network [OSTI]

    Authors, Various

    2011-01-01T23:59:59.000Z

    coal structures. Iodine-catalyzed photooxygenation of stilbene derivative 1k gives rise to two novel activated

  5. MAP Estimation with Gaussian Mixture Markov

    E-Print Network [OSTI]

    ;§Dual energy CT example · 12 clusters. · Display 2 dimensions out of 8 · Water/iodine decomposition GMM

  6. analyza fluordeoxyglukozy fdg: Topics by E-print Network

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

    Last Page Topic Index 1 Breast Imaging with Fluorine-18-FDG Quantitative Image Analysis PET: CiteSeer Summary: This study evaluated various quantitative criteria for analysis of...

  7. ElectroChemical Arsenic Removal (ECAR) for Rural Bangladesh--Merging Technology with Sustainable Implementation

    E-Print Network [OSTI]

    Addy, Susan E.A.

    2010-01-01T23:59:59.000Z

    Chemosphere, 55(9): 1245-1252. Mameri, N. et al. , 1998. "et al. , 2000), and fluorine (Mameri et al. , 1998) among

  8. ald na stali: Topics by E-print Network

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

    Summary: (Royal Society of Chemistry, 2009) 12;ALD PRECURSORS FOR NON-METALS 8 oxygen nitrogen fluorine, carbon deposited as pure, single elements ALD films have been made...

  9. Induction slag reduction process for making titanium

    DOE Patents [OSTI]

    Traut, Davis E. (Corvallis, OR)

    1991-01-01T23:59:59.000Z

    Continuous process for preparing titanium comprising fluorinating titanium ore, and reducing the formed alkaline earth fluotitanate with an alkaline earth metal in an induction slag reactor.

  10. Shattering of Peptide Ions on Self-Assembled Monolayer Surfaces...

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

    on a fluorinated self-assembled monolayer (SAM) surface was studied using a novel Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) specially equipped to...

  11. The crystal structure of pyridinium hexafluoroantimonate(V

    E-Print Network [OSTI]

    Copeland, Richard Franklin

    1963-01-01T23:59:59.000Z

    The arrangement of the fluorine atoms also appears to be disordered. The contribution to the X-ray scattering may be satisfactorily calculated by assuming that the disorder is best represented by a spherically rotating group of six fluorine atoms in a regular... octahedral arrangement with an antimony- fluorine bond distance of 1. 94 A. The minimum distances between the fluorine atoms and the atoms of the pyridine ring skeleton fall into two sets, one at 2 ' 63 A and 6 the other at 2. 755 A. For each group of six...

  12. Magnetic Material for PM Motors

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

    *In situ surface passivation approach reduced oxygen content by 60% *High level of control for up-scaled batch fluorination process reduced air oxidation rate by 70% over...

  13. Natural Organic Matter (NOM) in Aquatic Systems: Interactions with Radionuclides (234Th (IV), 129 I) and Biofilms

    E-Print Network [OSTI]

    Zhang, Saijin

    2011-10-21T23:59:59.000Z

    in natural waters. At the F-area of the Savannah River Site (SRS), iodine species in the groundwater consisted of 48.8 percent iodide, 27.3 percent iodate and 23.9 percent organo-iodine. Each of these iodine species exhibited vastly different transport...

  14. I/I ratios and halogen concentrations in pore waters of the Hydrate Ridge: Relevance for the origin of gas hydrates in ODP Leg 204

    E-Print Network [OSTI]

    Fehn, Udo

    in fluids associated with hydrocarbons, such as oil field brines (Moran et al., 1995) or coal-bed methane association of iodine with methane allows the identification of the organic source material responsible for iodine and methane in gas hydrates. In all cores, iodine concentrations were found to increase strongly

  15. Proceedings of the XIII International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, Florence, Italy 18-22 September 2000, The Int. Soc. for Opt. Eng. Vol. 4184, P.O. Box 10, Bellingham, WA 98227-0010, pp. 40-44.

    E-Print Network [OSTI]

    Carroll, David L.

    , electrical singlet oxygen generation, iodine dissociation. 1. INTRODUCTION Several dramatic changes to gain generator technologies are needed to allow chemical oxygen-iodine laser (COIL) systems to achieve their full improvements in generation of excited states of both oxygen and iodine. The development of gas phase O2(1 D

  16. *cuaerospace@cuaerospace.com; phone 217-333-8274; fax 217-244-7757; http://cuaerospace.com; CU Aerospace, 2004 S. Wright St. Ext., Urbana, IL, 61801; **wsolomon@uiuc.edu; phone 217-244-7646; fax 217-244-0720; http://www.aae.uiuc.edu;

    E-Print Network [OSTI]

    Carroll, David L.

    chemistry singlet oxygen generator (SOG). However, the logistic issues of dealing with the liquid SOG Work on the Development of an Electric Discharge Oxygen Iodine Laser D. L. Carroll*a , J. T. Verdeyen discharge oxygen-iodine laser (ElectriCOIL) system in conjunction with injection of pre-dissociated iodine

  17. Proceedings of the Gas and Chemical Lasers and Intense Beam Applications III Conference, San Jose, California 22-24 January 2002, The Int. Soc. for Opt. Eng. Vol. 4631, P.O. Box 10, Bellingham, WA 98227-0010, pp. 154-160.

    E-Print Network [OSTI]

    Carroll, David L.

    by a liquid chemistry singlet oxygen generator (SOG). Workers at CUA and UIUC are now addressing. Keywords: chemical oxygen-iodine laser, COIL, ElectriCOIL, RF excitation of oxygen, singlet-delta oxygen 1 oxygen-iodine laser (COIL) [McDermott, 1978] operates on the electronic transition of the iodine atom

  18. Looking before we leap: an ongoing, quantative investigation of asteroid and comet impact hazard mitigation

    SciTech Connect (OSTI)

    Plesko, Catherine S [Los Alamos National Laboratory; Weaver, Robert P [Los Alamos National Laboratory; Bradley, Paul A [Los Alamos National Laboratory; Huebner, Walter F [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    There are many outstanding questions about the correct response to an asteroid or comet impact threat on Earth. Nuclear munitions are currently thought to be the most efficient method of delivering an impact-preventing impulse to a potentially hazardous object (PHO). However, there are major uncertainties about the response of PHOs to a nuclear burst, and the most appropriate ways to use nuclear munitions for hazard mitigation.

  19. Lait (1994) 74, 325-332 Elsevier/INRA

    E-Print Network [OSTI]

    Boyer, Edmond

    was to study p-casein solubilization from native phos- phocaseinate in the conditions of cold storage.0 and 1.6 g/kg) before pH adjustment (4.0, 4.6 and 5.2) followed by cold storage (O°C). The amount did not have a marked effect. native phosphocaseinate II3-casein 1solubilization 1cold storage Résumé

  20. Some Factors Affecting the Utilization of Phosphoric Acid in Soils by Plants in Pot Experiments.

    E-Print Network [OSTI]

    Fudge, J. F. (Joseph Franklin); Fraps, G. S. (George Stronach)

    1944-01-01T23:59:59.000Z

    briefly as follows: Total phosphoric acid, Pz05: The soil was ignited with magnesium nitrate, the mixture was dissolved in hydrochloric acid, filtered, and phos- phoric acid was then determined by the volumetric method of the Associa- tion of Official...TEXAS AGRICULTURAL EXPERIMENT STATION A. B. CONNER, Director College Station, Texas BULLETIN NO. 647 APRIL, 1944 SOME FACTORS AFFECTING THE UTILIZATION OF PHOSPHORIC ACID IN SOILS BY PLANTS IN POT EXPERIMENTS G. S. FRAPS and J. F. FUDGE...

  1. A Chemical and Microbiological Study of Lufkin Fine Sandy Loam in Relation to Productiveness.

    E-Print Network [OSTI]

    Reynolds, E. B. (Elbert Brunner)

    1931-01-01T23:59:59.000Z

    and significantly correlated with the yields of cotton and corn. The nitrifying capacity of the soil was a better index of the crop-producing power of the soil than the total nitrogen, the total phosphoric acid, or the active phos- phoric acid of the soil.... The addition of nitrogenous materials, cottonseed meal and manure, and of phosphoric acid, as superphosphate and ground rock phosphate, stimulated the nitrifying power of the soil and increased the production of nitrates in field soil. Under conditions...

  2. A study of factors affecting the separation of phosphatides from cottonseed oil

    E-Print Network [OSTI]

    Popat, Pranjivan Velji

    1952-01-01T23:59:59.000Z

    -phos- phorus to phosphoric acid . Various workers have recommended the destruc- tion of organic smtter by sulfuric and nitric acids, sulfuric acid and hydrogen peroxide, nitric acid and nitrates, by alkali fusion mixtures and by dry incineration. For most... is that of Krasnow and co-workers (21) in which nitric acid and sulfuric acid are used in combination with potassium chlorate snd sodium and potassium nitrates in order to insure complete oxidation. King's method, with modifications, has been used by Reiger (31...

  3. GSK-3? phosphorylation of functionally distinct tau isoforms has differential, but mild effects

    E-Print Network [OSTI]

    Voss, Kellen; Gamblin, Truman Chris

    2009-05-02T23:59:59.000Z

    with AD-tau, as determined by mass spectrometry, and phos- phorylation site-specific antibodies [11-14]. In vivo, treat- ment of transgenic mouse models of tau-induced neurodegeneration with lithium chloride, an inhibitor of GSK-3?, reduces both tau... (Perkin-Elmer, Boston, MA). Sam- ples were filtered and washed to remove unincorporated ?-32P, then counted in a liquid scintillation counter (Pack- ard 1600TR) [19]. Assay Kit (Cytoskeleton, Inc., Denver, CO) using the man- ufacturer's protocol. Varying...

  4. Water quality and urban runoff in selected canal communities along the Texas coast

    E-Print Network [OSTI]

    Messenger, Allen Lester

    1979-01-01T23:59:59.000Z

    at points along the canal. There are data included in this report on monthly canal water quality for the seven study areas. Samples were analyzed for coli- forms, nitrite, nitrate, Kjeldahl nitrogen (organic nitrogen), phos- phates, TOC, BOD , dissolved..., temperature and salinity profiles, and Rhodamine dye dis- placement. The purpose of this report is to evaluate the sources of pollu- tional loading within the study communities . These data along with information from the literature on coastal canals...

  5. Current Biology, Vol. 13, 797806, May 13, 2003, 2003 Elsevier Science Ltd. All rights reserved. DOI 10.1016/S0960-9822(03)00329-4 TOS Motif-Mediated Raptor Binding Regulates 4E-BP1

    E-Print Network [OSTI]

    Sabatini, David M.

    . DOI 10.1016/S0960-9822(03)00329-4 TOS Motif-Mediated Raptor Binding Regulates 4E-BP1 Multisite identified a TOR signaling (TOS) motif in the N Thr46 is thought to prime 4E-BP1 for sequential phos in thedemonstrated that in S6K1, the TOS motif is necessary dissociation of 4E-BP1 from eIF4E [19, 20]. Free eIF4Eto

  6. The Forms of Phosophorus in Cotton Seed Meal.

    E-Print Network [OSTI]

    Rather, J. B. (James Burness)

    1912-01-01T23:59:59.000Z

    pprophos- phate but soluble in the free ammonia and nitric acid. Rarium ~ chloride gave a precipitate, ammonium molybdate gave a precipitate on heating, and magnesia mixture gave at once a white precipitate. The acetates of lead, mercury, iron... Washing. 6 TEXAS AGRICULTURAL EXPERIMENT STATIONS. Solubility in water, acids, and ammonia. The amount of phos rus soluble in 0.2 per cent hydrochloric acid is much lower than lished results for water soluble phosphorus in cottonseed meal. following...

  7. Organic Phosphoric Acid of the Soil.

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1911-01-01T23:59:59.000Z

    . ................................................ introduction 5 .............................. hmmonia-Soluble Phosphoric Acid 5 ................ Solubility of Phosphates in Ammonia 6 I Fixation of Phosphoric Acid from Ammonia .......... 7 Effect of Ratio of Soil to Solvent in Extraction of Phos- I I... .............. phoric Acid by Acid and Ammonia 7 I ........ Other Soil Constituents Dissolved by Ammonia 8 ................... Solution of Fixed Phosphoric Acid 10 ................ ormation of Ammonia-Solubla Phosphoric Acid 11 ....... hosphoric Acid Dissolved...

  8. A particulate non-specific alkaline phosphatase in Saccharomyces cerevisiae

    E-Print Network [OSTI]

    Mitchell, James Kent

    1980-01-01T23:59:59.000Z

    utant Strain DO4-AP2 24 24 24 30 31 36 39 41 43 43 43 46 46 51 51 TABLE OF CONTENTS (Continued) Isoelectric Focussing Page 53 IV. Discussion and Conclusions 56 V. References 65 VI, Vita 68 LIST OF TABLES Tables Page 1.... Fluorescent Readings of 4-methylumbelliferone 25 2. Fluorescent Readings of a-naphthol 25 3. Substrate Specificity of Particulate Alkaline Phosohatase 40 Intracellular Localization of Particulate Alkaline Phos- phatase 45 5. Specific Activity of a...

  9. Assessing Phosphorous Loss to Protect Surface Water

    E-Print Network [OSTI]

    Garcia, Raul

    2005-01-01T23:59:59.000Z

    . Minimizing phosphorus pollution of surface water from agricultural fields involves manage- ment practices that control both the source and transportation factors of soil. Influences that affect the source and the amount of phosphorus transported include... the type of phosphorus applied and the content in the soil itself. Transportation factors include rainfall, irrigation, erosion, and runoff. The overall aim of environmentally sound practices is to keep soil fertility levels of phos- phorus to a range...

  10. Proceedings of the International Conference on Lasers '98, ed. V.J. Corcoran, STS Press, McLean VA, 1999, in press. PERFORMANCE OF A HIGH POWER CHEMICAL OXYGEN-IODINE LASER

    E-Print Network [OSTI]

    Carroll, David L.

    -Champaign (UIUC)/STI Optronics team identified the decommissioning and decontamination (D&D) of nuclear facilities and deactivate the large numbers of nuclear reactor power stations now in place world-wide. Figure 1 shows

  11. Process for electrolytically preparing uranium metal

    DOE Patents [OSTI]

    Haas, Paul A. (Knoxville, TN)

    1989-01-01T23:59:59.000Z

    A process for making uranium metal from uranium oxide by first fluorinating uranium oxide to form uranium tetrafluoride and next electrolytically reducing the uranium tetrafluoride with a carbon anode to form uranium metal and CF.sub.4. The CF.sub.4 is reused in the fluorination reaction rather than being disposed of as a hazardous waste.

  12. This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research

    E-Print Network [OSTI]

    Wang, Weizhen

    of analytes [1]. As an alternative for hydrocar- bon columns, fluorocarbon columns have been developed for the separation of both fluorinated- and non-fluorinated compounds [2­9]. For example, fluorocarbon columns have been used successfully in fluorous mixture synthesis [10­14]. In comparison, the use of fluorocarbon

  13. Process for producing 8-fluoropurines

    DOE Patents [OSTI]

    Barrio, Jorge R. (Agoura Hills, CA); Satyamurthy, Nagichettiar (Los Angeles, CA); Namavari, Mohammad (Los Angeles, CA); Phelps, Michael E. (Encino, CA)

    1999-01-01T23:59:59.000Z

    An efficient, regiocontrolled approach to the synthesis of 8-fluoropurines by direct fluorination of purines with dilute elemental fluorine, or acetyl hypofluorite, is provided. In a preferred embodiment, a purine compound is dissolved in a polar solvent and reacted with a dilute mixture of F.sub.2 in He or other inert gas.

  14. BioMed Central Page 1 of 9

    E-Print Network [OSTI]

    Boyer, Edmond

    Research The influence of tumor oxygenation on 18F-FDG (Fluorine-18 Deoxyglucose) uptake: A mouse study using positron whether changing a tumor's oxygenation would alter tumor metabolism, and thus uptake of 18F-FDG (fluorine). Subsequently, 5 animals were studied using two sequential 18F-FDG injections administered to the same tumor

  15. Process for producing 8-fluoropurines

    DOE Patents [OSTI]

    Barrio, J.R.; Satyamurthy, N.; Namavari, M.; Phelps, M.E.

    1999-01-19T23:59:59.000Z

    An efficient, regio-controlled approach to the synthesis of 8-fluoropurines by direct fluorination of purines with dilute elemental fluorine, or acetyl hypofluorite, is provided. In a preferred embodiment, a purine compound is dissolved in a polar solvent and reacted with a dilute mixture of F{sub 2} in He or other inert gas.

  16. Investigation of Anion-pi Interactions in Inorganic, Organic and Biological Systems

    E-Print Network [OSTI]

    Funck, Edward Sterling

    2012-07-16T23:59:59.000Z

    omitted for the sake of clarity. Copper atoms (teal), carbon atoms (gray), nitrogen atoms (blue), phosphorus atoms (pink), fluorine atoms (yellow). ................................................................. 46 2.10 Mass spectrum showing [Cu... the olefin and the anion. ............................................................... 73 3.4 Sum of the energies predicted by NBO for the charge transfer interactions between the fluorine lone pairs and the antibonding orbitals of the olefins...

  17. Cationic Main Group Compounds as Water Compatible Small Anion Receptors

    E-Print Network [OSTI]

    Leamer, Lauren Anne

    2013-05-06T23:59:59.000Z

    .................................................. 31 27. Top: Fluoride capture and release protocol using [34]+. Bottom: Examples of fluorination reactions ................................................................ 33 28. Synthesis of 37, 38, and [39...-withdrawing substituents in triarylboranes constitutes a well-established method for enhancing their Lewis acidity.11 Noteworthy applications for these fluorinated boranes include the activation of transition metal and main group species via anionic ligand abstraction...

  18. Glasses having a low non-linear refractive index for laser applications

    DOE Patents [OSTI]

    Faulstich, Marga (Mainz, DE); Jahn, Walter (Ingelheim, DE); Krolla, Georg (Mainz, DE); Neuroth, Norbert (Mainz-Mombach, DE)

    1980-01-01T23:59:59.000Z

    Glass composition ranges are described which permit the introduction of laser activators into fluorphosphate glass with exceptionally high fluorine content while forming glasses of high crystallization stability and permitting the realization of large melt volumes. The high fluorine content imparts to the glasses an exceptionally low nonlinear refractive index n.sub.2 down to O,4 .times.10.sup.-13 esu.

  19. Systems and methods for treating material

    DOE Patents [OSTI]

    Scheele, Randall D; McNamara, Bruce K

    2014-10-21T23:59:59.000Z

    Systems for treating material are provided that can include a vessel defining a volume, at least one conduit coupled to the vessel and in fluid communication with the vessel, material within the vessel, and NF.sub.3 material within the conduit. Methods for fluorinating material are provided that can include exposing the material to NF.sub.3 to fluorinate at least a portion of the material. Methods for separating components of material are also provided that can include exposing the material to NF.sub.3 to at least partially fluorinate a portion of the material, and separating at least one fluorinated component of the fluorinated portion from the material. The materials exposed to the NF.sub.3 material can include but are not limited to one or more of U, Ru, Rh, Mo, Tc, Np, Pu, Sb, Ag, Am, Sn, Zr, Cs, Th, and/or Rb.

  20. FIGURE 1. (a) Side view schematic of the integrated short-cavity DBR laser-modulator, illustrating the Gain, DBR, and EAM sections. (b) Epitaxial base structure. To the right illustrates the intermixing process used: (i) surface fluorination followed by S

    E-Print Network [OSTI]

    Coldren, Larry A.

    , as shown in Fig. 1b. The upper waveguide also includes a GaAs regrowth layer followed by a sacrificial InGaP the active band-edge. Following QWI, the sacrificial InGaP layer is removed, and first order gratings

  1. Further evaluation of dose estimation using the FBX dosimeter

    E-Print Network [OSTI]

    Helfinstine, Suzanne Yvette

    1988-01-01T23:59:59.000Z

    offset and general discrep- ancy between the expected dose and the one measured by the FBX dosimeter. To determine the origin of these anomalies, the dosimeter was used in intimate mixtures with tritiated water, HTO, iodine crystals, and various dilute... iodine solutions. When mixed with HTO, the doses measured by the FBX solution were in better agree- ment with the doses predicted by MIRD techniques than the measurements with I. In 131 subsequent mixtures with stable iodine crystals, the dosimeter...

  2. Impact of transmutations in fusion environment on Flibe chemistry.

    SciTech Connect (OSTI)

    Sze, D. K.; Sawan, M. E.; Cheng, E. T.

    2000-11-15T23:59:59.000Z

    Transmutation rates of Li, Be and F are calculated for a typical flibe blanket. The results concluded that the transmutation rate of F is more than double that of Be. Because of the high destruction rate of fluorine, there will be no free fluorine in the molten salt. Therefore, experimental program to address the chemistry control of flibe does not have to worry about the issues associated with free fluorine. Also, this calculation defines the chemical of flibe after irradiation. This chemical state needs to be simulated closely for the flibe chemistry control experiment.

  3. Reactions of tungsten-titanium alloys with decomposition products from a glow UHF discharge in a tetrafluoromethane-oxygen mixture

    SciTech Connect (OSTI)

    Amirov, I.I.; Vinogradov, G.K.; Slovetskii, D.I.

    1988-07-01T23:59:59.000Z

    Decomposition products from tetrafluoromethane mixed with oxygen react with WTi alloy in an HF glow discharge, the extent of reaction being dependent on the atomic fluorine concentration, temperature, and surface potential. The rates of reaction with the CF/sub 4/ products are proportional to the atomic fluorine concentrations. The effective activation energies have been determined for the atomic fluorine reacting with the alloy components in various gases. The metal removal rate increases when the specimen is negative with respect to the plasma potential, which is ascribed to the surface being bombarded by positive ions or to the electric field affecting the surface reaction rates.

  4. June 2015 Most Viewed Documents for Biology And Medicine | OSTI...

    Office of Scientific and Technical Information (OSTI)

    Christopher; Keasling, Jay (2011) 59 PRODUCTION OF RADIOACTIVE IODINE. SCHLYER,D.J. (2001) 58 Defining the Effectiveness of UV Lamps Installed in Circulating Air Ductwork...

  5. TIMCHAMPION 11055 Painted Tree Road

    E-Print Network [OSTI]

    Bodner, George M.

    coefficientfor the extrac- tion of iodine between CCla and water. Glasstone (3)reports values of 85.1-87.5for

  6. Analytical Data Report of Water Samples Collected For I-129 Analysis

    SciTech Connect (OSTI)

    Lindberg, Michael J.

    2009-10-26T23:59:59.000Z

    This is an analytical data report for samples received from the central plateau contractor. The samples were analyzed for iodine-129.

  7. Sandia Energy - EC Publications

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

    high sorption capabilities for iodine gas. After the sorption of radionuclides, these materials can be directly converted into nanostructured waste forms. This new generation...

  8. actuales del implante: Topics by E-print Network

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

    Purpose: Permanent prostate brachytherapy (PPB) as a treatment option for prostate cancer requires implantation of 80-150 radioactive iodine-125 (I-125) "seeds" into the...

  9. alejados del implante: Topics by E-print Network

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

    Purpose: Permanent prostate brachytherapy (PPB) as a treatment option for prostate cancer requires implantation of 80-150 radioactive iodine-125 (I-125) "seeds" into the...

  10. Calling on a million minds for community annotation in WikiProteins

    E-Print Network [OSTI]

    Mons, Barend; Ashburner, Michael; Chichester, Christine; van Mulligen, Erik; Weeber, Marc; den Dunnen, Johan T; Musen, Marc; Cockerill, Matthew; Hermjakob, Henning; Packer, Abel; Pacheco, Roberto; Lewis, Suzanna; Berkeley, Alfred; Melton, William; Barris, Nickolas; Borner, Katy; Meijssen, Gerard; Moeller, Erik; Roes, Peter Jan; Mons, Albert; van Ommen, Gert; Wales, Jimmy; Bairoch, Amos

    2008-05-28T23:59:59.000Z

    search engine be case insensitive and find CLB2 based on the query term Clb2, but in a wider context, case insensitivity leads to aggravation of the ambiguity prob- lem. For example, in PubMed, the query 'Clb2' delivers papers on dental self... '. Furthermore, the authors of this abstract have used several constructs that make text mining difficult as they enter conjugate terms such as 'mitotic cyclin (Clb2)-bound Cdc28 (Cdk1 homolog)', 'Clb2-Cdc28', 'Clb2-Cdc28-phos- phorylated Swe1', 'Cdc28/Cdk1...

  11. The Soils of Eastland, El Paso, Lubbock and San Saba Counties.

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1926-01-01T23:59:59.000Z

    foods in the soil. example, with the Caddo fine sandy loam of Camp county, the corn possibility for active phosphoric acid is 18, for the active potash 80, and for total nitrogen 23. The soil is probably deficient first in phos- phoric acid..., and vegetables are also produced as well as live stock. Table 4 contains the acreage and percentage of some of the types of soils which occur in Eastland county. Sixteen types were mapped and grouped into seven series. The Windthorst fine sandy loam occupies...

  12. Soils of Grayson, Lee, McLennan, Titus, and Tyler Counties.

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1916-01-01T23:59:59.000Z

    ,,.iocphate to supply the phogphoric acid. Tf truck crops were to be grown on this soil, some potash would probahlp be needed. In the case of the Wilson clay loam, the analysis indicates the need ? phosphoric acid first. With Wilson clap, also of Grapson... of this area are, as a rule, well supplied with total phos- phoric acid, though the samples of Durant fine sand, Houston clay loam, and MTilson clay, are low in this respect. The anklyses indicate that a nnuinber of these soils should, however, respond...

  13. The Chemical Composition of Soils of Cameron, Coleman, Dallas, Erath, Harris, Reeves, Rockwall and Tarrant Counties.

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1931-01-01T23:59:59.000Z

    the relative deficiencies of plant food in the soil. The corn possibility is also a convenient way of comparing amounts of various plant foods in the same soil. For example, with the Lake Charles clay loam of Harris county, the corn possibility for total... nitrogen is 28, for active phos- phoric acid is 12, and for the active potash 50. The soil is probably deficient both in phosphoric acid and in nitrogen. This may he com- pared with the Victoria clay loam of Cameron countv, which has a corn possibility...

  14. Wheat Pasture Poisoning. 

    E-Print Network [OSTI]

    Crookshank, H. R.; Sims, Frank H.

    1956-01-01T23:59:59.000Z

    serum of normal cows was compared with the serum of cows affected with wheat pasture poisoning, a decrease in inarganic phos- phate, total and diffusible calcium, magnesium and the albumin-globulin ratio was found in the cases. The total serum protein... treatment appears to be the injection of a calcium gluconate solution with or without fortification with magnesium and phosphorus. Recovery seems to be speeded by removing the cow from wheat pasture fox a short time. No recurrence was o~bselrved ii animal...

  15. Effects of soil treatments supplemented with two rates of magnesium sulfate on the availability of soil nutrients and on the yield and chemical composition of coastal Bermuda grass 

    E-Print Network [OSTI]

    Evatt, Nathan S

    1951-01-01T23:59:59.000Z

    'ZATZ ON THE AVAILABILITY OF SOIL NUTRIENTS AND ON TH YIELD AND CHENICAL COMPOSITICN GF CO. iSTAL BERNUDA GHASS INTRODUCTION It is known that magnesium is one of' the elements essential for plant growth; however much is to be learned concerning its specific functions... within the plant, Host Texas soils are not deficient, in magnesium (23). Magnesium is reported to be a carrier of the phos- phorus used by the plant. It is entirely possible that the failure to obtain crops of higher phosphorus content upon...

  16. The effect of fertilizer treatments on several amino acids of Dallis grass grown in the Gulf Coast region of Texas 

    E-Print Network [OSTI]

    Polzer, Wilfred Leo

    1956-01-01T23:59:59.000Z

    blook experiment with twelve treatments each replioated four times. It was set up as a pasture fertilizer test with sulfur, sources of phosphorus and lime used as fertilizer for the treatments. Table 1 gives the field randomiza- tion of the twelve... Super and 46 Sulfur Lime and Super 47 Hock Phos. and Sulfur Super Lime and Super and Sulfur Rock Pbos. 1954. The spr1ng and summer had been especially dry at the location of this test; therefore the forage d1d not have good growth...

  17. Next-Generation Wireless Instrumentation Integrated with Mathematical...

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

    cells used to convert aluminum oxide to aluminum. Smelter pots emit fluorinated hydrocarbons, CF4 and C2F6, which have global warming potentials of 6,500 (i.e., 1 ton of CF4...

  18. Disposal unit

    DOE Patents [OSTI]

    Landau, Ralph (Brooklyn, NY)

    2004-03-16T23:59:59.000Z

    The invention relates to a method and apparatus for separating toxic compounds from gaseous mixtures, and more particularly to a method and a portable apparatus for the continuous removal of fluorine and compounds thereof from gaseous mixtures.

  19. A Novel Route to Enantioenriched ?-Allyl ?-Fluoroketones via Palladium Catalyzed Decarboxylation

    E-Print Network [OSTI]

    Barron, Briana R.

    2008-08-21T23:59:59.000Z

    This thesis details the development of a novel catalytic asymmetric route to ?-fluorinated ketones. Enantioenriched ?-fluoroketones were produced in good yields and high enantiomeric ratios via palladium-catalyzed ...

  20. Title of Document: MECHANISTIC STUDIES OF PLASMA-SURFACE INTERACTIONS DURING

    E-Print Network [OSTI]

    Anlage, Steven

    devices and ICs produced. Fluorocarbon discharges are commonly used for dielectric etching, e.g. SiO2. Free fluorine atoms that are liberated from fluorocarbon species during ion bombardment are driven

  1. U.S. Department of the Interior U.S. Geological Survey

    E-Print Network [OSTI]

    Torgersen, Christian

    - es are carbon dioxide, sulfur dioxide, hydrogen sulfide, hydrogen, and fluorine. Sulfur dioxide gas have nearly crashed be- cause of engine failure. Large eruption clouds can extend hundreds of miles

  2. Zevenhoven & Kilpinen Halogens, dioxins/furans 17.6.2001 7-1 Chapter 7 Halogens,

    E-Print Network [OSTI]

    Zevenhoven, Ron

    applications as HF, used in the glass industry, as UF6 used in separating 235 U and 238 U isotopes compound CCl4. Fluorine is mainly found as HF in some fossil fuel-derived gases or when processing glass

  3. Liquid-phase and vapor-phase dehydration of organic/water solutions

    DOE Patents [OSTI]

    Huang, Yu (Palo Alto, CA); Ly, Jennifer (San Jose, CA); Aldajani, Tiem (San Jose, CA); Baker, Richard W. (Palo Alto, CA)

    2011-08-23T23:59:59.000Z

    Processes for dehydrating an organic/water solution by pervaporation or vapor separation using fluorinated membranes. The processes are particularly useful for treating mixtures containing light organic components, such as ethanol, isopropanol or acetic acid.

  4. SUR LE SPECTRE D'ABSORPTION DE LA VAPEUR D'EAU DANS L'ULTRAVIOLET DE SCHUMANN Par Mme ANDRE JOHANNIN-GILLES et M. BORIS VODAR,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    bandes larges et diffuses lorsque la pression augmente. Price [4] qui, cepen- dant, annonce l'existence d corindon aug- mente de la même façon que celle du quartz. Celles de la fluorine du fluorure de lithium et

  5. Fluorous Biphase Synthesis of a Poly(p-phenyleneethynylene) and its Fluorescent Aqueous Fluorous-Phase Emulsion

    E-Print Network [OSTI]

    Lim, Jeewoo

    It's just a phase: A highly fluorinated compound with a rigid three-dimensional architecture was synthesized as a monomer for poly(p-phenyleneethynylene)s (PPEs). Fluorous biphase reactions were applied for the synthesis ...

  6. Modeling the micellization behavior of fluorosurfactants using molecular-thermodynamic theory

    E-Print Network [OSTI]

    Iyer, Jaisree (Jaisree Kannan)

    2013-01-01T23:59:59.000Z

    Fluorinated surfactants are an important class of surfactants because they possess properties that are far superior than those of their hydrocarbon analogs. As a result, they are used in a wide variety of applications ...

  7. Fuel cell electrolyte membrane with acidic polymer

    DOE Patents [OSTI]

    Hamrock, Steven J. (Stillwater, MN); Larson, James M. (Saint Paul, MN); Pham, Phat T. (Little Canada, MN); Frey, Matthew H. (Cottage Grove, MN); Haugen, Gregory M. (Edina, MN); Lamanna, William M. (Stillwater, MN)

    2009-04-14T23:59:59.000Z

    An electrolyte membrane is formed by an acidic polymer and a low-volatility acid that is fluorinated, substantially free of basic groups, and is either oligomeric or non-polymeric.

  8. Integrated Manhattan Project for Excellence in Radiochemistry (IMPER)

    SciTech Connect (OSTI)

    Lewis, Jason

    2014-03-27T23:59:59.000Z

    Accomplishments are reported in these areas: single step radiolabeling of peptides with fluorine-18; photoreduction of 99Tc pertechnetate by nanometer-sized metal oxides for environmental remediation; synthesis and characterization of multi-modal CNT imaging constructs.

  9. Detection and Differentiation of Neutral Organic Compounds by [superscript 19]F NMR with a Tungsten Calix[4]arene Imido Complex

    E-Print Network [OSTI]

    Zhao, Yanchuan

    Fluorinated tungsten calix[4]arene imido complexes were synthesized and used as receptors to detect and differentiate neutral organic compounds. It was found that the binding of specific neutral organic molecules to the ...

  10. Incompatible Chemicals The following list is to be used only as a general guideline. Please refer to your Material Safety

    E-Print Network [OSTI]

    Slatton, Clint

    , butane, methane, propane(or other petroleum gases), hydrogen, sodium carbide, benzene, finely divided other chemicals Hydrocarbons (such as butane, propane, benzene) Fluorine, chlorine, bromine, chromic) Tellurides Reducing Agents #12;CHEMICAL STORAGE GUIDELINES STORE MATERIALS OUTLINED BY BOXES SEPARATELY

  11. Fatigue Enhancement of a Carbon Fiber Reinforced Nanocomposite

    E-Print Network [OSTI]

    Wilkerson, Justin W.

    2008-08-19T23:59:59.000Z

    The primary objective of the present investigation is to study the fatigue characteristics of a woven carbon fiber reinforced polymer which has been modified with either amine or fluorine functionalized carbon nanotubes on the fiber-matrix interface...

  12. Multiply Complex, Non-Toxic, Anti-Fouling Surfaces Designed for Marine and Biomedical Applications

    E-Print Network [OSTI]

    Pollack, Kevin A

    2014-12-09T23:59:59.000Z

    was investigated. These studies included the use of different components for each of the three components of the system. Specifically, the use of silsesquioxanes as a hydrophobic component, zwitterions as a hydrophilic component and a bis-functional fluorinated...

  13. Biodegradation Potential of Perfluorooctanoate and Perfluorooctane Sulfonate

    E-Print Network [OSTI]

    Thelakkat Kochunarayanan, Parvathy

    2012-10-19T23:59:59.000Z

    and fluorine present in PFOA and PFOS makes them stable and resistant to conventional treatment processes. Several advanced chemical processes can degrade PFOA and PFOS under high temperatures and pressures or other extreme conditions. However, the potential...

  14. Synthesis, Characterization and Anion Binding Properties of Boron-based Lewis Acids

    E-Print Network [OSTI]

    Zhao, Hai Yan

    2012-07-16T23:59:59.000Z

    fluorination chemistry. Interestingly, the telluronium systems show a greater fluoride anion affinity than their sulfonium analogs. This increase is assigned to the greater spatial and energetic accessibility of the sigma* orbital on the tellurium atom which...

  15. Quantitative Determination of Chemical Processes by Dynamic Nuclear Polarization Enhanced Nuclear Magnetic Resonance Spectroscopy

    E-Print Network [OSTI]

    Zeng, Haifeng

    2012-07-16T23:59:59.000Z

    . The binding of fluorinated ligands to the protease trypsin was studied through the observation of various NMR parameter changes, such as line width, signal intensity and chemical shift of the ligands. Intermolecular polarization transfer from hyperpolarized...

  16. Amphiphilic Hyperbranched Fluoropolymer Networks as Passive and Active Antibiofouling Coatings: From Fundamental Chemical Development to Performance Evaluation

    E-Print Network [OSTI]

    Imbesi, Philip

    2012-10-19T23:59:59.000Z

    of fluorinated species in the water-swollen state. A series of coatings was replicated, and found to have variable performance against three marine fouling organisms. The HBFP-PEG surfaces almost entirely resisted the settlement of barnacle cyprids (Balanus...

  17. Application of Dissolution Dynamic Nuclear Polarization to the Characterization of Reactions Involving Large Molecules

    E-Print Network [OSTI]

    Lee, Youngbok

    2013-03-13T23:59:59.000Z

    aims to extend the applicability of D-DNP into new areas of chemistry, which involve the characterization of interactions and reactions involving large molecules. In a first project, fluorine hyperpolarization is exploited to investigate protein...

  18. Nested potassium hydroxide etching and protective coatings for silicon-based microreactors

    E-Print Network [OSTI]

    de Mas, Nuria

    We have developed a multilayer, multichannel silicon-based microreactor that uses elemental fluorine as a reagent and generates hydrogen fluoride as a byproduct. Nested potassium hydroxide etching (using silicon nitride ...

  19. Process for the production of 5'-deoxy-5-(/sup 18/F)fluorouridine

    DOE Patents [OSTI]

    Shiue, C.Y.; Wolf, A.P.; Friedkin, M.

    1983-08-10T23:59:59.000Z

    Process for the production of 5'-deoxy-5-fluorouridine and the corresponding /sup 18/F compound by the reaction of fluorine or acetyl hypofluorite with 2', 3'-di-O-acetyl-5'-deoxyuridine followed by hydrolysis.

  20. Polymeric Gels DOI: 10.1002/anie.201310385

    E-Print Network [OSTI]

    Aizenberg, Joanna

    of optical and mechanical properties of the fluorogel can be achieved. After infusing with fluorinated infused into the perfluorinated elastomers to yield a new type of organogels, namely "fluorogels", which

  1. CX-007967: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Electrochemical Fluorination in Molten Fluoride Salts CX(s) Applied: B3.6 Date: 02/07/2012 Location(s): South Carolina Offices(s): Savannah River Operations Office

  2. Adv. Mat. in press Fabrication and properties of composites of

    E-Print Network [OSTI]

    . The gas was then switched to a mixture of fluorine gas (20%) and nitrogen (80%) for 10 hours at constant, with 1-50nm in diameter and 1-10µm in length. Experimental results on individual carbon nanotubes

  3. Phase II Independent Investigation of the Paducah Gaseous Diffusion...

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

    from the fluorination ash and cylinder heels for classified uses. In response to a demand for technetium for use at Oak Ridge, a program to recover technetium from the cylinder...

  4. Modified lithium vanadium oxide electrode materials products and methods

    DOE Patents [OSTI]

    Thackeray, Michael M. (Naperville, IL); Kahaian, Arthur J. (Chicago, IL); Visser, Donald R. (Naperville, IL); Dees, Dennis W. (Downers Grove, IL); Benedek, Roy (Western Springs, IL)

    1999-12-21T23:59:59.000Z

    A method of improving certain vanadium oxide formulations is presented. The method concerns fluorine doping formulations having a nominal formula of LiV.sub.3 O.sub.8. Preferred average formulations are provided wherein the average oxidation state of the vanadium is at least 4.6. Herein preferred fluorine doped vanadium oxide materials, electrodes using such materials, and batteries including at least one electrode therein comprising such materials are provided.

  5. Rare earth oxide fluoride nanoparticles and hydrothermal method for forming nanoparticles

    DOE Patents [OSTI]

    Fulton, John L. (Richland, WA) [Richland, WA; Hoffmann, Markus M. (Richland, WA) [Richland, WA

    2001-11-13T23:59:59.000Z

    A hydrothermal method for forming nanoparticles of a rare earth element, oxygen and fluorine has been discovered. Nanoparticles comprising a rare earth element, oxygen and fluorine are also described. These nanoparticles can exhibit excellent refractory properties as well as remarkable stability in hydrothermal conditions. The nanoparticles can exhibit excellent properties for numerous applications including fiber reinforcement of ceramic composites, catalyst supports, and corrosion resistant coatings for high-temperature aqueous solutions.

  6. Rare Earth Oxide Fluoride Nanoparticles And Hydrothermal Method For Forming Nanoparticles

    DOE Patents [OSTI]

    Fulton, John L. (Richland, WA); Hoffmann, Markus M. (Richland, WA)

    2003-12-23T23:59:59.000Z

    A hydrothermal method for forming nanoparticles of a rare earth element, oxygen and fluorine has been discovered. Nanoparticles comprising a rare earth element, oxygen and fluorine are also described. These nanoparticles can exhibit excellent refractory properties as well as remarkable stability in hydrothermal conditions. The nanoparticles can exhibit excellent properties for numerous applications including fiber reinforcement of ceramic composites, catalyst supports, and corrosion resistant coatings for high-temperature aqueous solutions.

  7. The determination of some anions using ion chromatography and ion chromatography-graphite furnace atomic absorption spectrometry

    E-Print Network [OSTI]

    Hillman, Daniel C

    1981-01-01T23:59:59.000Z

    Spectrometry. (August 1981) Daniel C. J. Hillman, B. S. , San Diego State University Chairman of Advisory Committee: Dr. Ralph A. Zingaro Fluorine in NBS coal standards 1632 and 1632a and in a Texas lignite core sample was determined using ion... with a fluoride ion selective electrode. The fluorine concentration in the Texas lignite core sample ranged from 50 to 95 ppm F. Ion chromatography alone was shown not to be useful in the deter- mination of selenite and selenate in natural water...

  8. Fluoride removal in the presence of organophosphates: application to chemical warfare agent destruction

    E-Print Network [OSTI]

    Wenaas, Christopher Eric

    1996-01-01T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX G MEASURED pK& OF MPA. . . . . APPENDIX H SCOPING CALCULATIONS. 44 VITA 46 LIST OF FIGURES Page Figure I: Fluorinated organophosphate nerve agents which are capable of undergoing hydrolysis neutralization reactions. Figure 2 A typical... Weapons Convention, or CWC, will ban the use, development, production, and stockpiling of all chemical weapons. The largest class of nerve agents stockpiled in the world is comprised of organophosphate compounds, primarily fluorinated organophosphates...

  9. An Improved Model for Sandstone Acidizing and Study of the Effect of Mineralogy and Temperature on Sandstone Acidizing Treatments and Simulation

    E-Print Network [OSTI]

    Agarwal, Amit Kumar

    2013-01-14T23:59:59.000Z

    of the product distribution towards silicon and aluminum complexes coordinated by fewer fluorine atoms; hence, reduces the consumption of HF (Gdanski and Shuchart 1996). To minimize the matrix unconsolidation and precipitation of reaction products, proper... and composition of acid solution. 19 The prominent form of aluminum fluoride species varies as a function of the free fluoride ion concentration (Labrid 1975). The average ratio of fluorine to aluminum decreases as the dissolution reaction progresses...

  10. Further Investigation of Fluoboric Acid in Sandstone Acidizing Using ^(11)B and ^(19)F NMR

    E-Print Network [OSTI]

    Pituckchon, Arpajit

    2014-05-01T23:59:59.000Z

    by the result of and aqueous solution titration with thorium nitrate in the presence of alizarin red S, which suggested that none of the fluoride in is available but the fluorine in is rapidly and quantitatively available (Wamser 1951...). 7 The observed decrease in acid strength in the order ( ) ( ) may be explained by the changes in the electrostatic inductive effect of the anion on the proton as fluorine atoms are successively replaced by hydroxyl...

  11. A Novel Fluorous Biphasic System: Werner-type Complexes in Fluorous Media

    E-Print Network [OSTI]

    Sullivan, Ann R.

    2012-02-14T23:59:59.000Z

    ........................................................................................... 5 Figure 1.3. B?hlmann?s fluorous phosphonium salt ................................................. 6 Figure 1.4. Perfluorinated crown ethers: directly fluorinated (top), fluorous tagged (middle), Pozzi?s phase transfer catalyst... expanded the definition to mean "of or relating to, or having the characteristics of highly fluorinated saturated organic materials, molecules, or molecular fragments."2 These materials possess properties different from aqueous and organic materials...

  12. High Temperature Materials for Aerospace Applications

    E-Print Network [OSTI]

    Adamczak, Andrea Diane

    2011-08-08T23:59:59.000Z

    Chair of Advisory Committee: Dr. Jaime C. Grunlan Further crosslinking of the fluorinated polyimide was examined to separate the cure reactions from degradation and to determine the optimum post curing conditions. Glass transition... ranging from 225 ? 362 ?C, with 1.7 - 3.0 wt% absorbed moisture, and the polyimide composite had blister temperatures from 246 ? 294 ?C with 0.5 - 1.5 wt% moisture. iv Weight loss of the fluorinated polyimide and its corresponding polyimide carbon...

  13. The structure of oxygen difluoride and an attempted preparation of cyanogen fluoride

    E-Print Network [OSTI]

    Hilton, Albert Ray

    1959-01-01T23:59:59.000Z

    ...................................................... 45 Figure 5. A Graphical Determination of the Fluorine Carbon Force Constant for FCN ...................... . . . ............ 46 Page vi ABSTRACT The molecular structure of oxygen difluoride (OF2 ) gas was studied by a standard microwave... components, where J is the total angular momentum quantum number of the initial state. 11 EXPERIMENTAL PROCEDURE 1. Preparation of Oxygen Difluoride Oxygen difluoride was prepared by passing fluorine gas through a cold, dilute, aqueous solution of sodium...

  14. UID-GaN doping1016 cm-3 2 m 5 m2 m

    E-Print Network [OSTI]

    Boyer, Edmond

    2 µm Drain Silicon UID-GaN ­ doping1016 cm-3 1.1 µm 30 nm 2 µm GateSource 2 µm 5 µm2 µm AirAir Al0.25GaN ­ doping1015 cm-3 30 nm Scalable normally-off MIS-HEMT using Fluorine implantation below-Electron-Mobility-Transistor (MIS-HEMT) is proposed. The design is based on the implantation of fluorine ions in the GaN layer below

  15. For permission to copy or to republish, contact the copyright owner named on the first page. For AIAA-held copyright, write to AIAA Permissions Department,

    E-Print Network [OSTI]

    Carroll, David L.

    by a liquid chemistry singlet oxygen generator (SOG). * Engineering Director, CU Aerospace, Senior Member AIAA) may be produced in an electrical discharge that may permit lasing of an electric discharge oxygen oxygen-iodine laser (COIL) [McDermott, 1978] operates on the electronic transition of the iodine atom

  16. JOURNAL DE PHYSIQUE IV Colloque C7, suppldment au Journal de Physique 111,Vol. 1, dkembre 1991

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    SOMEFEATURES OF THE KINETICS OF OXYGEN-IODINELASER WITH PHOTOLYTICAL SINGLETOXYGEN GENERATION M.P. FROLOV, Yu of the kinetics of the pulsed oxygen-iodine laser with photolytic source of singlet oxygen are presented influence of oxygen atoms on molecular iodine dissociation and energy store relaxation is observed

  17. wsolomon@uiuc.edu; phone 1-217-244-7646; fax 1-217-244-0720; http://www.aae.uiuc.edu; Univ. of Illinois, 306 Talbot Lab, 104 S. Wright St., Urbana, IL 61801.

    E-Print Network [OSTI]

    Carroll, David L.

    (1 ) is produced by a liquid chemistry singlet oxygen generator (SOG). However, the difficulties of employing oscillation of a chemical oxygen-iodine laser system in conjunction with injection of pre-dissociated iodine. Results of those studies along with recent experimental results indicate that generation of O2(1 ) can

  18. For permission to copy or to republish, contact the copyright owner named on the first page. For AIAA-held copyright, write to AIAA Permissions Department,

    E-Print Network [OSTI]

    Carroll, David L.

    oxygen generator (SOG). However, the logistic issues of dealing with the liquid SOG * Engineering oxygen-iodine laser (COIL) [McDermott, 1978] operates on the electronic transition of the iodine atom electric generation scheme to provide the precursor energy donor species O2(1 D) and that an electrically

  19. IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 41, NO. 10, OCTOBER 2005 1309 Studies of CW Laser Oscillation on the 1315-nm

    E-Print Network [OSTI]

    Carroll, David L.

    is produced by a liquid chemistry singlet oxygen generator (SOG). There are many system issues having to do composed of two 99.995% reflective mirrors. Index Terms--Chemical oxygen­iodine laser (COIL), electric discharge oxygen­iodine laser, electriCOIL, radio frequency (RF) excitation of oxygen, singlet-delta oxygen

  20. wsolomon@uiuc.edu; phone 1-217-244-7646; fax 1-217-244-0720; http://www.aae.uiuc.edu; Univ. of Illinois, 306 Talbot Lab, 104 S. Wright St., Urbana, IL 61801.

    E-Print Network [OSTI]

    Carroll, David L.

    oxygen generator (SOG). However, the difficult issues involving liquid SOG systems motivated permit lasing of an electric discharge oxygen-iodine laser (ElectriCOIL) system, possibly in conjunctionCOIL, COIL, chemical oxygen iodine laser, electric discharge modeling 1. INTRODUCTION The classic chemical

  1. JOURNALDE PHYSIQUEIV ColloqueC7, suppl6ment au Journal de Physique 111,Vol. 1, dhmbre 1991

    E-Print Network [OSTI]

    Boyer, Edmond

    system (figure I)consists o f a bubble column singlet oxygen generator, a water vapor cold trap are being conducted on a high power chemical oxygen iodine laser. Optical diagnostics were developed t o power o f at least one kilowatt i s expected. 1 - Introduction The chemical oxygen iodine laser (COIL

  2. Volume 170, number 5,6 CHEMICAL PHYSICS LETTERS 20 July 1990 Nature of the red emission

    E-Print Network [OSTI]

    Zare, Richard N.

    in the chemical oxygen iodine laser system Ruiping Huang `, Rong Zhang ' and Richard N. Zare Deparfmenfof at 703 nm is observed when a heated metal wire is placed downstream of an O,( `A& generator used in the chemical oxygen iodine laser (COIL) system. The O2(`4) isproduced by bubbling Cl, through an alkaline

  3. AIAA Plasmadynamics and Lasers Conference 5-8 June 2006, San Francisco, California

    E-Print Network [OSTI]

    Carroll, David L.

    chemical singlet oxygen generator (SOG) with an electrically excited all gas phase system.3,4 Other to improvements in the hybrid Electric Oxygen-Iodine Laser (ElectricOIL) system that significantly increased system parameters. I. Introduction The classical chemical oxygen iodine laser (COIL) system1 employs

  4. Modeling of a Multi-Stream Injection COIL with Enhanced Mixing Ejectors

    E-Print Network [OSTI]

    Carroll, David L.

    - oxygen generator (SOG). The liquid SOG technology has developed to a fairly mature state. However, much-pressure chemical oxygen- iodine laser (COIL) have been experimentally tested. To obtain a better understanding The chemical oxygen-iodine laser (COIL) was first demonstrated in 1978 [McDermott, 1978]. Since that initial

  5. Investigation of the Production of O2(a1 ) in Rectangular

    E-Print Network [OSTI]

    Carroll, David L.

    is not simply a flow consisting primarily of O2(a) and O2(X) (as in classic COIL singlet-oxygen generation Oxygen- Iodine Laser (ElectricOIL) system. This continuous wave (cw) laser operating on the 1315 nm-section and multi-circular tube discharges. I. Introduction The electrically driven oxygen-iodine laser (Electric

  6. Transmutation of {sup 129}I Using an Accelerator-Driven System

    SciTech Connect (OSTI)

    Nishihara, Kenji; Takano, Hideki [Japan Atomic Energy Research Institute (Japan)

    2002-01-15T23:59:59.000Z

    A conceptual blanket design for {sup 129}I transmutation is proposed for an accelerator-driven system (ADS) that is designed to transmute minor actinides (MAs). In this ADS, 250 kg/yr of MA and 56 kg/yr of iodine are simultaneously transmuted, and they correspond to the quantities generated from {approx}10 units of existing light water reactors. Furthermore, an introduction scenario and the benefit of iodine transmutation are studied for future introduction of fast breeder reactors. It is shown that the transmutation of iodine benefits the concept of underground disposal.

  7. Photochemical removal of NpF sub 6 and PuF sub 6 from UF sub 6 gas streams

    SciTech Connect (OSTI)

    Beitz, J.V.; Williams, C.W.

    1990-01-01T23:59:59.000Z

    A novel photochemical method of removing reactive fluorides from UF{sub 6} gas has been discovered. This method reduces generated waste to little more than the volume of the removed impurities, minimizes loss of UF{sub 6}, and can produce a recyclable by-product, fluorine gas. In our new method, impure UF{sub 6}, is exposed to ultraviolet light which dissociates the UF{sub 6} to UF{sub 5} and fluorine atom. Impurities which chemically react with UF{sub 5} are reduced and form solid compounds easily removed from the gas while UF{sub 5} is converted back to UF{sub 6}. Proof-of-concept testing involved UF{sub 6} containing NpF{sub 6} and PuF{sub 6} with CO added as a fluorine atom scavenger. In a single photolysis step, greater than 5000-fold reduction of PuF{sub 6} was demonstrated while reducing NpF{sub 6} by more than 40-fold. This process is likely to remove corrosion and fission product fluorides that are more reactive than UF{sub 6} and has been demonstrated without an added fluorine atom scavenger by periodically removing photogenerated fluorine gas. 44 refs., 3 figs., 2 tabs.

  8. Thermal Reactions of Uranium Metal, UO2, U3O8, UF4, and UO2F2 with NF3 to Produce UF6

    SciTech Connect (OSTI)

    McNamara, Bruce K.; Scheele, Randall D.; Kozelisky, Anne E.; Edwards, Matthew K.

    2009-11-01T23:59:59.000Z

    he objective of this paper is to demonstrate that NF3 fluorinates uranium metal, UO2, UF4, UO3, U3O8, and UO2F2•2H2O to produce the volatile UF6 at temperatures between 100 and 500?C. Thermogravimetric reaction profiles are described that reflect changes in the uranium oxidation state and discrete chemical speciation. Differences in the onset temperatures for each system indicate that NF3-substrate interactions are important for the temperature at which NF3 reacts: U metal > UO3 > UO2 > UO2F2 > UF4 and in fact may indicate different fluorination mechanisms for these various substrates. These studies demonstrate that NF3 is a potential replacement fluorinating agent in the existing nuclear fuel cycle and in oft-proposed actinide volatility reprocessing.

  9. Organo-Lewis acids of enhanced utility, uses thereof, and products based thereon

    DOE Patents [OSTI]

    Marks, Tobin J. (Evanston, IL); Chen, You-Xian (Midland, MI)

    2001-01-01T23:59:59.000Z

    The organo-Lewis acids are novel triarylboranes which are highly fluorinated. Triarylboranes of one such type contain at least one ring substituent other than fluorine. These organoboranes have a Lewis acid strength essentially equal to or greater than that of the corresponding organoborane in which the substituent is replaced by fluorine, or have greater solubility in organic solvents. Another type of new organoboranes have 1-3 perfluorinated fused ring groups and 2-0 perfluorophenyl groups. When used as a cocatalyst in the formation of novel catalytic complexes with d- or f-block metal compounds having at least one leaving group such as a methyl group, these triorganoboranes, because of their ligand abstracting properties, produce corresponding anions which are capable of only weakly, if at all, coordinating to the metal center, and thus do not interfere in various polymerization processes such as are described.

  10. Organo-Lewis acids of enhanced utility, uses thereof, and products based thereon

    DOE Patents [OSTI]

    Marks, Tobin J. (Evanston, IL); Chen, You-Xian (Midland, MI)

    2002-01-01T23:59:59.000Z

    The organo-Lewis acids are novel triarylboranes which are are highly fluorinated. Triarylboranes of one such type contain at least one ring substituent other than fluorine. These organoboranes have a Lewis acid strength essentially equal to or greater than that of the corresponding organoborane in which the substituent is replaced by fluorine, or have greater solubility in organic solvents. Another type of new organoboranes have 1-3 perfluorinated fused ring groups and 2-0 perfluorophenyl groups. When used as a cocatalyst in the formation of novel catalytic complexes with d- or f-block metal compounds having at least one leaving group such as a methyl group, these triorganoboranes, because of their ligand abstracting properties, produce corresponding anions which are capable of only weakly, if at all, coordinating to the metal center, and thus do not interfere in various polymerization processes such as are described.

  11. Laser development for laser fusion applications. Research progress report, October 1978-September 1979

    SciTech Connect (OSTI)

    Not Available

    1980-05-01T23:59:59.000Z

    During this report period, emphasis has been directed toward the advanced development of the HF, KrF, Se(/sup 1/S)-Se(/sup 3/P), and the chemically pumped iodine laser systems.

  12. Assessing beef hide interventions as a means to reduce carcass contamination

    E-Print Network [OSTI]

    Baird, Bridget Elaine

    2007-04-25T23:59:59.000Z

    following a water wash. Treatments (distilled water, isopropyl alcohol, 3% hydrogen peroxide, 2% L-lactic acid, 1% cetylpyridinium chloride (CPC), and 10% Povidone-iodine) then were applied to each section and sampled for aerobic plate counts (APCs...

  13. March 2005 Page 1 of 2 CDCResearchInvolvingRadiationReleasesfromtheIdahoNational

    E-Print Network [OSTI]

    iodine-129 and -131, cesium-137, strontium-90, and noble gases including krypton-88. The body organs by the INL Environmental Dose Reconstruction document search to determine which contaminants and exposure

  14. The chemistry of OH and HO2 radicals in the boundary layer over the tropical Atlantic Ocean

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    B. , Hebestreit, K. , and Platt, U. : Short-lived alkylR. , Lawrence, M. G. , Platt, U. , and Crutzen, P. J. :Hebestreit, K. , Stutz, J. , and Platt, U. : Iodine oxide in

  15. Alcohol homologation

    DOE Patents [OSTI]

    Wegman, Richard W. (South Charleston, WV); Moloy, Kenneth G. (Charleston, WV)

    1988-01-01T23:59:59.000Z

    A process for the homologation of an alkanol by reaction with synthesis gas in contact with a system containing rhodium atom, ruthenium atom, iodine atom and a bis(diorganophosphino) alkane to selectivity produce the next higher homologue.

  16. Alcohol homologation

    DOE Patents [OSTI]

    Wegman, R.W.; Moloy, K.G.

    1988-02-23T23:59:59.000Z

    A process is described for the homologation of an alkanol by reaction with synthesis gas in contact with a system containing rhodium atom, ruthenium atom, iodine atom and a bis(diorganophosphino) alkane to selectivity produce the next higher homologue.

  17. Hypothetical Reactor Accident Study

    E-Print Network [OSTI]

    POPULATIONS; IODINE 131; MELTDOWN; METEOROLOGY; NUCLEAR POWER PLANTS; P CODES; PWR TYPE REACTORS; RADIATION in a Typical BWR and in a typical PWR. Comparison with WASH-1400 by C F . Højerup 202 APPENDIX 3. Calculation

  18. HYDROLOGY AND EROSION IMPACTS OF MINING DERIVED COASTAL SAND DUNES, C H ~ A R A LBAY, CHILE

    E-Print Network [OSTI]

    HYDROLOGY AND EROSION IMPACTS OF MINING DERIVED COASTAL SAND DUNES, C H ~ A R A LBAY, CHILE Daniel, nitrates, iodine, and lithium. Some of the gold and silverandallofthemolybdenumareproducedasby- products

  19. International Journal of Hydrogen Energy 32 (2007) 463468 www.elsevier.com/locate/ijhydene

    E-Print Network [OSTI]

    Weidner, John W.

    2007-01-01T23:59:59.000Z

    Center for Electrochemical Engineering, Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208 is produced via a two-step process involving iodine. The distillation of HI from solution and concurrent

  20. OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY

    E-Print Network [OSTI]

    Iodine Thermochemical Process X Forecourt| SMR X X X X X Electrolysis Ethanol Reforming X X X X X X X X with CO2 Capture X X Advanced Nuclear Energy ­ HTGR and High Temperature (Steam) Electrolysis X Advanced