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Tritium half-life

Description: Least squares analyses of calorimetric measurements made at Mound Laboratory on two tritide compounds over a period of 18 y were performed to determine the half-life of tritium. A half-life of 12.3232 +- 0.0043 mean solar years was obtained.
Date: December 22, 1977
Creator: Rudy, C. R. & Jordan, K. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radioactive waste disposal areas and associated environmental surveillance data at Oak Ridge National Laboratory

Description: Environmental surveillance data have been collected around radioactive waste disposal areas for the past thirty years at Oak Ridge National Laboratory (ORNL). The wealth of data collected around the ORNL radioactive waste burial grounds is presented in this review. The purpose of this paper is to describe the solid waste burial grounds in detail along with the environmental monitoring data. The various monitoring systems are reviewed, and the liquid discharge trends are discussed. Monitoring at… more
Date: December 1, 1979
Creator: Oakes, T. W. & Shank, K. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tritium Tracer Movement as an Analogy for Pump and Treat Remediation

Description: There has been debate over effectiveness of groundwater pump and treat remediation. The goal of the following discussion is to present evidence from a tracer test that illustrates the difficulty in removing contaminants from fractured shale that is typical of portions of the DOE-Oak Ridge Reservation (ORR). This report provides a brief prelude to more detailed analysis that is in progress. Attempts to remediate groundwater contamination with pump and treat technology have been hampered by diffi… more
Date: December 1994
Creator: Oak Ridge National Laboratory. Environmental Sciences Division.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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[Regulation of terpene metabolism]. Annual progress report, March 15, 1991--March 14, 1992

Description: This report describes accomplishments over the past year on understanding of terpene synthesis in mint plants and sage. Specifically reported are the fractionation of 4-S-limonene synthetase, the enzyme responsible for the first committed step to monoterpene synthesis, along with isolation of the corresponding RNA and DNA cloning of its gene; the localization of the enzyme within the oil glands, regulation of transcription and translation of the synthetase, the pathway to camphor biosynthesis,a… more
Date: December 31, 1992
Creator: Croteau, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A perspective of hazardous waste and mixed waste treatment technology at the Savannah River Site

Description: Treatment technologies for the preparation and treatment of heavy metal mixed wastes, contaminated soils, and mixed mercury wastes are being considered at the Savannah River Site (SRS), a DOE nuclear material processing facility operated by Westinghouse Savannah River Company (WSRC). The proposed treatment technologies to be included at the Hazardous Waste/Mixed Waste Treatment Building at SRS are based on the regulatory requirements, projected waste volumes, existing technology, cost effective… more
Date: December 31, 1991
Creator: England, J. L.; Venkatesh, S.; Bailey, L. L.; Langton, C. A.; Hay, M. S.; Stevens, C. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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D-erythroascorbic acid: Its preparations, chemistry, and metabolism (fungi and plants). Second year [annual] report, [May 23, 1988--May 22, 1990]

Description: Sclerotinia sclerotiorum contains D-erythroascorbic acid (EAA) and a closely related reducing acid, possibly the open-chain form of EAA. The organism cleaves one of these products or possibly both to yield OA and D-glyceric acid. The OA is rapidly secreted into the medium. An analogy can be made between AA-linked OA biosynthesis in higher plants and EAA-linked OA biosynthesis in fungi as exemplified by S. sclerotiorum.
Date: December 31, 1990
Creator: Loewus, F. A. & Seib, P. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermal cycle limits for tritium hydride beds

Description: During revision of the Tritium Facility Technical Standards, a thermal cycle limit was added to the {open_quotes}Hydride Vessels{close_quotes} Technical Standard. A limit of 1,000 cycles was added since the metallurgical effect of repeated thermal cycling of the stainless steel hydride beds was not known. Procedures would require modifications to record the number of thermal cycles a bed has experienced during its life-time. The calculations in this report show that the operations of the hydrid… more
Date: December 31, 1992
Creator: Klein, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tritium Waste Control Project progress report: April--June 1976. [LIS; electrolysis; monitor; shipping container; catalytic exchange]

Description: Tritiated Liquid Waste Decontamination (Molecular Excitation): A preliminary economic study of water detritiation by laser isotope separation indicates possible advantages over the catalytic exchange process. The electric power requirements are a factor of 5 lower, resulting in a 50-percent reduction in operating costs. Capital costs for the two methods appear comparable. Additional attempts were made to determine the ir spectrum of HTO around the ..nu../sub 1/ band. However, carbon dioxide imp… more
Date: December 10, 1976
Creator: Bixel, J. C. & Kershner, C. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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D-erythroascorbic acid: Its preparations, chemistry, and metabolism (fungi and plants). Final report

Description: The origin of oxalate in plants has received considerable attention and glycolate metabolism has been generally regarded as a prime precursor candidate although studies on the metabolism of L-ascorbic acid single out that plant constituent as well. Experiments with oxalate-accumulating plants that contain little or no tartaric acid revealed the presence of a comparable L-ascorbic acid metabolism with the exception that the cleavage products were oxalic acid and L-threonic acid or products of L-… more
Date: December 31, 1991
Creator: Loewus, F. A. & Seib, P. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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[Regulation of terpene metabolism]. Annual progress report, March 15, 1988--March 14, 1989

Description: Progress in understanding of the metabolism of monoterpenes by peppermint and spearmint is recorded including the actions of two key enzymes, geranyl pyrophosphate:limonene cyclase and a UDP-glucose dependent glucosyl transferase; concerning the ultrastructure of oil gland senescence; enzyme subcellular localization; regulation of metabolism; and tissue culture systems.
Date: December 31, 1989
Creator: Croteau, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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[Signal transduction in plant development: Chemical and biochemical approaches to receptor identification]. [Annual report, May 15, 1991--May 14, 1993]

Description: We have pursued inhibitor development and found that the inhibitors both the cyclopropyl- and oxiranequinones are intolerant of other substituents on the quinone nucleus and are only marginally tolerant to substitution on the three-membered rings. The tritiated cyclopropane and oxirane benzoquinones were prepared as labeled inhibitors. The material from each step of the fractionation procedure were evaluated for NAD(P)H 2,6-DMBQ oxidoreductase activity that was inhibited by the cyclopropyl and … more
Date: December 31, 1992
Creator: Lynn, D. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Proposal to process RTNS-II accelerator targets for LLL

Description: This proposal is submitted in response to a programmatic need at LLL for a supplier of 50-cm targets (tritided) for the new RTNS-II facility. Previous letters of inquiry to Mound also delineate a need for recovery of tritium from expended RTNS-II targets. As explained in this proposal, the tritided target manufacturing and tritium recovery can be accomplished in an efficient and timely manner at Mound Facility. Mound has been a major tritium handling facility for over 20 yr. Multigram quantitie… more
Date: December 20, 1977
Creator: Mershad, E. A.; Clift, W. A.; Wieneke, R. E.; Coffey, D. L.; Nesslage, G. V.; Metcalf, L. W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Membrane vesicles: A simplified system for studying auxin transport. Final technical report

Description: Indoleacetic acid (IAA), the auxin responsible for regulation of growth, is transported polarly in plants. Several different models have been suggested to account for IAA transport by cells and its accumulation by membrane vesicles. One model sees diffusion of IAA driven by a pH gradient. The anion of a lipophilic weak acid like IAA or butyrate accumulates in an alkaline compartment in accord with the size of the pH gradient The accumulation of IAA may be diminished by the permeability of its l… more
Date: December 31, 1989
Creator: Goldsmith, M. H. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The nature and alternate rates of the ribulose 1,5-bisphosphate (RuBP) carboxylase/oxygenase (Rubisco) oxygenation intermediate

Description: Mutant ribulose 1,5-bisphosphate (RuBP) were employed to investigate the partitioning of carbon flow between photosynthesis or photorespiration. Previous functional and structural studies implicate active site Lys329 and Glu48 or R. rubrum RuBp in promoting addition of CO2 to the RuBP-enediol. Two novel O2-dependent side products generated by the K329A and E49Q mutants provided insight into RuBP oxygenase intermediate and roles of Lys329 and Glu48 in oxygenation.
Date: December 31, 1995
Creator: Harpel, M. R.; Chen, Yuh-Ru & Hartman, F. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Catalytic roles of flexible regions at the active site of ribulose-bisphosphate carboxylase/oxygenase (Rubisco)

Description: Chemical and mutagenesis studies of Rubisco have identified Lys329 and Glu48 as active-site residues that are located in distinct, interacting domains from adjacent subunits. Crystallographic analyses have shown that Lys329 is the apical residue in a 12-residue flexible loop (loop 6) of the {Beta},{alpha}-barrel domain of the active site and that Glu48 resides at the end of helix B of the N-terminal domain of the active site. When phosphorylated ligands are bound by the enzyme, loop 6 adopts a … more
Date: December 31, 1995
Creator: Hartman, F. C.; Harpel, M. R.; Chen, Yuh-Ru; Larson, E. M. & Larimer, F. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cell signalling and phospholipid metabolism. Final report

Description: These studies explored whether phosphoinositide (PI) has a role in plants analogous to its role in animal cells. Although no parallel activity of PI in signal transduction was found in plant cells, activity of inositol phospholipid kinase was found to be modulated by light and by cell wall degrading enzymes. These studies indicate a major role for inositol phospholipids in plant growth and development as membrane effectors but not as a source of second messengers.
Date: December 31, 1990
Creator: Boss, W. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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