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Clean, premium-quality chars: Demineralized and carbon enriched

Description: The goal of this project is to develop a bench-scale procedure to produce clean, desulfurized, premium-quality chars from the Illinois basin coals. This goal is achieved by utilizing the effective capabilty of smectites in combination with methane to manipulate the char yields. The major objectives are: to determine the optimum water- ground particle size for the maximum reduction of pyrite and minerals by the selective-bitumen agglomeration process; to evaluate the type of smectite and its int… more
Date: January 3, 1992
Creator: Smith, G.V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiochemical separation of neptunium and plutonium from leaching of reactor waste glass in brine solutions

Description: The work described in this paper is part of a leaching study being conducted for the Battelle Pacific Northwest Laboratory's Waste Isolation Safety Assessment Program. Simulated high-level reactor waste glass was leached with three solutions, one of which was a saturated-salt brine. Because chemical separation of Np and Pu using organic extraction or anionic exchange is not effective for the brine samples, a procedure has been developed to first separate neptunium and plutonium from high concen… more
Date: October 3, 1979
Creator: Rego, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Model catalytic oxidation studies using supported monometallic and heterobimetallic oxides

Description: This research program is directed toward a more fundamental understanding of the effects of catalyst composition and structure on the catalytic properties of metal oxides. Metal oxide catalysts play an important role in many reactions bearing on the chemical aspects of energy processes. Metal oxides are the catalysts for water-gas shift reactions, methanol and higher alcohol synthesis, isosynthesis, selective catalytic reduction of nitric oxides, and oxidation of hydrocarbons. A key limitation … more
Date: February 3, 1992
Creator: Ekerdt, J. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quantitative risk in radiation protection standards

Description: Although the overall aim of radiobiology is to understand the biological effects of radiation, it also has the implied practical purpose of developing rational measures for the control of radiation exposure in man. The emphasis in this presentation is to show that the enormous effort expended over the years to develop quantitative dose-effect relationships in biochemical and cellular systems, animals, and human beings now seems to be paying off. The pieces appear to be falling into place, and a… more
Date: January 3, 1979
Creator: Bond, V.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of novel Sol-Gel Indicators (SGI's) for in-situ environmental measurements: Part 1, Program and a new pH Sol-Gel Indicator

Description: The feasibility of incorporating analytical indicators into a sol-gel glassy matrix and then coating substrates with this composite material has bee demonstrated. Substrates coated include paper, wood, glass, and the lens of an analytical probe. The first SRTC sol-gel indicator, comprising bromophenol blue dispersed in a silica matrix, was fabricated and successfully used to measure solution pH in the range of pH 3.0 to 7.5. material exhibited a quick response time, as measured by color changes… more
Date: November 3, 1992
Creator: Livingston, R. R.; Baylor, L. & Wicks, G. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New prodrugs based on phospholipid-nucleoside conjugates

Description: A method is described for the preparation of defined, isomerically pure phospholipid-nucleoside conjugates as a prodrug in which the drug (araC) is attached to the phospholipid by a monophosphate linkage. Key intermediates in the process involve selective blocking and deblocking of the nucleoside derivative. These particular monophosphate-linked derivatives represent a new class of prodrug, which are useful by themselves or in combination with diphosphate linked derivatives. Several new composi… more
Date: February 3, 1982
Creator: MacCoss, M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Development of Alcohol-Based Synthetic Transportation Fuels From Coal-Derived Synthesis Gases. Third Quarterly Progress Report, April 1-June 30, 1980

Description: Fourteen catalysts were prepared by either evaporation of metal nitrate-citric acid solutions or by impregnation of inert supports with metal nitrate-citric acid solutions. Fourteen catalysts were tested in either the Berty gradientless reactor or the plug-flow reactor. These catalysts have been characterized intto the following five groups: Group I - catalysts containing Cu, Zn, Co, Cr and alkali; Group II - catalysts of Group I without Zn or Co or Cr; Group III - modified methanol synthesis c… more
Date: December 3, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Response of DWPF thermal flowmeters to composition change: Effect on 02 determination in Salt Process Cell

Description: Thermal flowmeters (more accurately described as hot wire anamometers) have been installed in the Salt Process Cell (SPC) at the Savannah River Site to measure in-cell process flows. However, upon investigating the effect of composition on thermal flow meters, it was concluded that determining a priori correction factors is a very complicated process requiring fairly precise knowledge of the vapor composition and the meter characteristics. It is recommended that DWPF estimate air enleakage usin… more
Date: February 3, 1992
Creator: Jacobs, R.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Savannah River Site's Groundwater Monitoring Program

Description: This report summarizes the Savannah River Site (SRS) groundwater monitoring program conducted during the first quarter of 1992. It includes the analytical data, field data, data review, quality control, and other documentation for this program; provides a record of the program's activities; and serves as an official document of the analytical results.
Date: August 3, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Direct Methane Conversion to Methanol

Description: Objective is to demonstrate the effectiveness of a catalytic membrane reactor (ceramic membrane combined with catalyst) to selectively produce methanol by partial oxidation of methane. None of the membranes tested in a high pressure system could selectively remove methanol, until a cooling tube was inserted inside the membrane reactor to quench the product stream; this effectively increased methanol selectivity 2[times] during methane oxidation. For both conditions, combined selectivity for met… more
Date: December 3, 1992
Creator: Falconer, J. L. & Noble, R. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Combustibility of tetraphenylborate solids

Description: Liquid slurries expected under normal in-tank processing (ITP) operations are not ignitible because of their high water content. However, deposits of dry solids from the slurries are combustible and produce dense, black smoke when burned. The dry solids burn similarly to Styrofoam and more easily than sawdust. It is the opinion of fire hazard experts that a benzene vapor deflagration could ignite the dry solids. A tetraphenylborate solids fire will rapidly plug the waste tank HEPA ventilation f… more
Date: May 3, 1989
Creator: Walker, D. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Explosive double salts and preparation. [Patent application]

Description: A new composition of matter has been discovered which is an explosive addition compound of ammonium nitrate (AN) and diethylenetriamine trinitrate (DETN) in a 50:50 molar ratio. the compound is stable over extended periods of time only at temperatures higher than 46/sup 0/C, decomposing to a fine-grained eutectic mixture (which is also believed to be new) of AN and DETN at temperatures lower than 46/sup 0/C. The compound of the invention has an x-ray density of 1.61 g/cm/sup 3/, explodes to for… more
Date: February 3, 1982
Creator: Cady, H. H. & Lee, K. Y.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Savannah River Plant 200 Area technical manual. Part SP. Processing of Np/sup 237/ and Pu/sup 238/

Description: This manual covers the technology involved in the 200 Area process for the recovery of Np/sup 237/ from certain aqueous waste streams in the separations plants, for the recovery of NP/sup 237/ and Pu/sup 238/ from irradiated NpO/sub 2/-Al slugs and for the fabrication of NpO/sub 2/-Al slugs. The manual contains sections on the fundamental chemistry, the primary recovery of Np by ion exchange, the decontamination of Np by ion exchange, the processing of NpO/sub 2/-Al targets, the separation and … more
Date: January 3, 1963
Creator: Hill, A.J. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recommendations for new monitoring wells at Everest, Kansas.

Description: On February 15, 2007, the Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA) submitted Recommendations for Remedial Action at Everest, Kansas. Those Recommendations were accepted by the Kansas Department of Health and Environment (KDHE) in a letter to the CCC/USDA dated March 5, 2007. The approved Recommendations document outlines a plan for systematic groundwater sampling and monitoring at Everest to provide data necessary for the critical evaluation of remedial opti… more
Date: May 3, 2007
Creator: LaFreniere, L. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Molecular studies of functional aspects of plant mitochondria

Description: The goal of this research is to characterize the mechanism by which a protein encoded by mitochondrial genome of cms-T maize (URF13) interacts with a family of the compounds produced by certain fungi (T-toxins) to permeabilize biological membranes. The research carried out during the current funding period has focused on the structure of URF13, and the results support the validity of the three-helix model of URF13 and provide direct evidence for the oligomeric nature of at least some of the URF… more
Date: March 3, 1992
Creator: Siedow, J. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Relative attenuation characteristics of some shielding materials for PuB neutrons. [2. 2 MeV]

Description: Relative attenuation measurements of 2.2 MeV neutrons in up to 12 inches of shield are reported for the following shielding materials: polyethylene, water, spodumene-gypsum, Gypsum (wet and dry), and concrete. (SDF)
Date: January 3, 1977
Creator: Bringham, P. S. & McCaslin, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of novel Sol-Gel Indicators (SGI`s) for in-situ environmental measurements: Part 1, Program and a new pH Sol-Gel Indicator

Description: The feasibility of incorporating analytical indicators into a sol-gel glassy matrix and then coating substrates with this composite material has bee demonstrated. Substrates coated include paper, wood, glass, and the lens of an analytical probe. The first SRTC sol-gel indicator, comprising bromophenol blue dispersed in a silica matrix, was fabricated and successfully used to measure solution pH in the range of pH 3.0 to 7.5. material exhibited a quick response time, as measured by color changes… more
Date: November 3, 1992
Creator: Livingston, R. R.; Baylor, L. & Wicks, G. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Specifications for several epoxy resins and hardeners used in filament winding

Description: Specifications are reported which were developed for several epoxy resins and hardeners used in filament winding. The specifications are concise, aimed at testing convenience, and contain the minimum number of tests necessary to define the material.
Date: May 3, 1976
Creator: Penn, L. S. & Newey, H. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Oligo and Poly-thiophene/Zno Hybrid Nanowire Solar Cells

Description: We demonstrate the basic operation of an organic/inorganic hybrid single nanowire solar cell. End-functionalized oligo- and polythiophenes were grafted onto ZnO nanowires to produce p-n heterojunction nanowires. The hybrid nanostructures were characterized via absorption and electron microscopy to determine the optoelectronic properties and to probe the morphology at the organic/inorganic interface. Individual nanowire solar cell devices exhibited well-resolved characteristics with efficiencies… more
Date: November 3, 2009
Creator: Briseno, Alejandro L.; Holcombe, Thomas W.; Boukai, Akram I.; Garnett, Erik C.; Shelton, Steve W.; Frechet, Jean J. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Vadose Zone Remediation of CO2 Leakage from Geologic CO2 Storage Sites

Description: In the unlikely event that CO2 leakage from deep geologic CO2 sequestration sites reaches the vadose zone, remediation measures for removing the CO2 gas plume may have to be undertaken. Carbon dioxide leakage plumes are similar in many ways to volatile organic compound (VOC) vapor plumes, and the same remediation approaches are applicable. We present here numerical simulation results of passive and active remediation strategies for CO2 leakage plumes in the vadose zone. The starting time for th… more
Date: March 3, 2004
Creator: Zhang, Yingqi; Oldenburg, Curtis M. & Benson, Sally M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effect of simultaneous and sequential detonation on explosive-induced fracture

Description: Tests were conducted in samples of polystyrene to study the effects of detonation delay on explosively induced fracturing. Two explosive charges in separate emplacement holes were fired at several choices of delay. The effect of free surfaces was minimized to make the experiments a study of blast-induced fracturing in a confined mode, i.e., deeply buried. All fractures formed on radial planes with respect to the emplacement holes. Simultaneous firing connected emplacement holes and produced fra… more
Date: March 3, 1978
Creator: Swift, R. P.; Schatz, J. F.; Durham, W. B.; Hearst, J. R. & Kusubov, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Potential for Exothermic Chemical Reactions in Waste Tanks

Description: The potential for exothermic chemical reactions in waste tanks at Hanford is discussed. Organic chemicals have been added to Hanford waste tanks, particularly as ferrocyanides and when processing sludges at B Plant. Recent planned or ongoing activities involving stored wastes have possibly increased the potential for reaction of these wastes with nitrate salts in the waste tanks. Risk evaluations appear to be deficient in assessing the consequences of a deflagration, and in determining the prob… more
Date: February 3, 1983
Creator: Van Tuyl, H. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Technology transfer: Ion exchange resins for Technetium-99 removal from X-705 raffinates

Description: An ion exchange process will be used at Portsmouth to remove Technetium-99 from uranium recovery waste solutions (raffinates). Subsequent treatment will then remove nitrates from the raffinates by a biodenitrification process prior to discharge to receiving streams to meet environmental standards for liquid wastes. Ion exchange process parameters affecting safe and efficient raffinate treatment have been examined in the laboratory, and results are described in this report. 4 refs., 3 figs., 6 t… more
Date: December 3, 1982
Creator: Deacon, L.E. & Greiner, M.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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