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Zircex Uranium Sublimate Loss
"One of the limitations of the Zircex Process is the large percentage loss of U which is carried off with the volatile ZrCl/sub 4/. Since the ratio of U to Zr in the fuel element is quite small (< 1%), a large percentage of U loss can be caused by small amounts of U in the ZrCl/sub 4/ sublimate. The U loss must be kept below 1% if the Zircex Process is to be adapted to industrial scale processing."
Date:
January 24, 1958
Creator:
Jaworowski, T. R. & King, III, C. J.
System:
The UNT Digital Library
Differential Voltammetry Using The Hanging Mercury Drop Electrode
"The general techniques of voltammetry with continuously varying potential have been applied to a differential method in which two electrolysis cells are used, each with a hanging mercury drop electrode. Using this method it is possible to determine lO/sup -6/ solutions with increased precision, and it is also possible to analyze solutions as dilute as 10/sup -6/ without removing oxygen from the electrolysis cells. Mixtures can be analyzed easily by adding individual components of the mixture to the reference cell."
Date:
January 1958
Creator:
Martin, Kenneth J. &
System:
The UNT Digital Library
Taxes of Texas: A Field Guide
Report describing different types of taxes collected in the state of Texas with a brief description and statistics for each one, along with general background information and other resources. "This report contains estimates and projections from the Comptrollers 2024-25 Certification Revenue Estimate, based on available information, assumptions and estimates as of the date of the forecast" (back cover).
Date:
January 2024
Creator:
Texas. Comptroller's Office.
System:
The Portal to Texas History
Summary of geothermal studies in Montana, 1980 through 1983. DOE final report
The geology, hydrology, and surface manifestations of geothermal systems in Montana are described by area. Water-quality information, tables of inventory and water analysis data for springs and wells, and a geothermal resource map are included. (MHR)
Date:
January 1, 1984
Creator:
Sonderegger, J.L.
System:
The UNT Digital Library
Quantification of Libby Reservoir Levels Needed to Maintain or Enhance Reservoir Fisheries, 1985 Annual Report.
The goal was to quantify seasonal water levels needed to maintain or enhance the reservoir fishery in Libby. This report summarizes data collected from July 1984 through July 1985, and, where appropriate, presents data collected since 1983. The Canada, Rexford, and Tenmile areas of the reservoir are differentially affected by drawdown. Relative changes in water volume and surface area are greatest in the Canada area and smallest in the Tenmile area. Reservoir morphology and hydraulics probably play a major role in fish distribution through their influence on water temperature. Greatest areas of habitat with optimum water temperature for Salmo spp. and kokanee occurred during the spring and fall months. Dissolved oxygen, pH and conductivity levels were not limiting during any sampling period. Habitat enhancement work was largely unsuccessful. Littoral zone vegetation plantings did not survive well, primarily the result of extreme water level fluctuations. Relative abundances of fish species varied seasonally within and between the three areas. Water temperature is thought to be the major influence in fish distribution patterns. Other factors, such as food availability and turbidity, may mitigate its influence. Sampling since 1975 illustrates a continued increase in kokanee numbers and a dramatic decline in redside shiners. Salmo …
Date:
January 1, 1985
Creator:
Chisholm, Ian
System:
The UNT Digital Library
Wildlife and Wildlife Habitat Mitigation Plan for Libby Hydroelectric Project, Final Report.
This report describes the proposed mitigation plan for wildlife losses attributable to the construction of the Libby hydroelectric project. Mitigation objectives and alternatives, the recommended mitigation projects, and the crediting system for each project are described by each target species. The report describes mitigation that has already taken place and 8 recommended mitigation projects designed to complete total wildlife mitigation. 8 refs., 2 figs., 12 tabs.
Date:
January 1, 1985
Creator:
Mundinger, John
System:
The UNT Digital Library
Wildlife and Wildlife Habitat Mitigation Plan for Hungry Horse Hydroelectric Project, Final Report.
This report describes the proposed mitigation plan for wildlife losses attributable to the construction of the Hungry Horse hydroelectric project. In this report, mitigation objectives and alternatives, the recommended mitigation projects, and the crediting system for each project are described by each target species. Mitigation objectives for each species (group) were established based on the loss estimates but tailored to the recommended projects. 13 refs., 3 figs., 19 tabs.
Date:
January 1, 1985
Creator:
Bissell, Gael
System:
The UNT Digital Library
Quantification of Libby Reservoir Levels Needed to Maintain or Enhance Reservoir Fisheries, 1990-1994 Investigations of Fish Entrainment Through Libby Dam.
We investigated fish entrainment through Libby Dam from December 1990 to June 1994. This study was one portion of the effort by the Montana Department of Fish, Wildlife and Parks to quantify Libby Dam operations necessary to maintain or enhance Libby Reservoir fisheries.
Date:
January 1, 1996
Creator:
Skaar, Don
System:
The UNT Digital Library
Solvent extraction of thorium(IV), uranium(VI), and europium(III) with lipophilic alkyl-substituted pyridinium salts. Final report for subcontract 9-XZ2-1123E-1, June 1, 1992--December 1, 1995
In the treatment of high level nuclear wastes, aromatic pyridinium salts which are radiation-resistant are desired for the extraction of actinides and lanthanides. The solvent extraction of Th{sup +4}, UO{sub 2}{sup +2}, and Eu{sup +3} by three aromatic extractants, 3,5-didodecylpyridinium nitrate (35PY), 2,6-didodecylpyridinium nitrate (26PY), and 1-methyl-3,5-didodecyl-pyridinium iodide (1M35PY) has been studied in nitric acid media. The general order of extractability of the three extractants in toluene was 1M35PY>> 26PY > 35PY. The overall extraction efficiency of the metal ions was Th{sup +4} >UO{sub 2}{sup +2} > Eu{sup +3}. The extraction of HNO{sub 3}, which was competitive with the extraction of metal ions, was quantitatively investigated by NaOH titration and UV spectrometry. The loading capacity suggested that the extracted species in the organic phase for thorium was (R{sub 4}N{sup +}){sub 2}Th(NO{sub 3}{sup -}){sub 6}, where R{sub 4}N{sup +} denotes 1M35PY. A comparison of 1M35PY to the well-characterized extractant, Aliquat-336, an aliphatic ammonium salt was made. At the same extractant concentration, 1M35PY extracted thorium more efficiently than Aliquat-336 at high acidity. Thorium could be readily stripped with dilute nitric acid from 1M35PY. After irradiation of 0.1M 1M35PY with {sup 60}Co at 40R/min for 48 hours, no change in the extraction efficiency …
Date:
January 1, 1997
Creator:
Ensor, D.D.
System:
The UNT Digital Library
Chemical activation of molecules by metals: Experimental studies of electron distributions and bonding
Purpose of this research program is to obtain experimental information on the different fundamental ways metals bond and activate organic molecules. Our approach has been to directly probe the electronic interactions between metals and molecules through a wide variety of ionization spectroscopies and other techniques, and to investigate the relationships with bonding modes, structures, and chemical behavior. During this period, we have (1) characterized the electronic features of diphosphines and monophosphines in their coordination to metals, (2) carried out theoretical and experimental investigations of the bonding capabilities of C[sub 60] to transition metals, (3) developed techniques for the imaging of single molecules on gold substrates that emphasizes the electronic backbonding from the metal to the molecule, (4) obtained the high resolution photoelectron spectrum of pure C[sub 70] in the gas phase, (5) compared the bonding of [eta][sup 3]- acetylide ligands to the bonding of other small organic molecules with metals, and (6) reported the photoelectron spectra and bonding of [eta][sup 3]-cyclopropenyl groups to metals.
Date:
January 1, 1992
Creator:
Lichtenberger, D.L.
System:
The UNT Digital Library
MOLECULAR COMPLEXES OF FLAVINS AND PHENOLS. IV. SEMIQUINONE HYDROIODIDE COMPLEXES
None
Date:
January 1, 1964
Creator:
Fleischman, Darrell E. & Tollin, Gordon
System:
The UNT Digital Library
RADIOLOGICAL HEALTH MANUAL FOR THE EXPERIMENTAL GAS-COOLED REACTOR. RADIATION PROTECTION STANDARDS AND REGULATIONS
None
Date:
January 1, 1965
Creator:
unknown
System:
The UNT Digital Library
BIOLOGICAL POLYMERS RELATED TO CATECHOL. EPR AND IR STUDIES OF MELANIN, TANNIN, LIGNIN, HUMIC ACID AND HYDROXYQUINONES
None
Date:
January 1, 1964
Creator:
Steelink, Cornelius & Tollin, Gordon
System:
The UNT Digital Library
LIGHT-INDUCED SINGLE ELECTRON TRANSFER REACTIONS BETWEEN CHLOROPHYLL $alpha$ AND QUINONES IN SOLUTION. III. ABSOLUTE QUANTUM YIELDS AS A FUNCTION OF TEMPERATURE AND SOLVENT
None
Date:
January 1, 1963
Creator:
Tollin, Gordon; Chatterjee, Kumar K. & Green, Gisele
System:
The UNT Digital Library
Technical Progress Report.
None
Date:
January 1, 1970
Creator:
Krishna, V. G.
System:
The UNT Digital Library
MOLECULAR COMPLEXES OF FLAVINS AND PHENOLS. II. FACTORS INFLUENCING SPECTRA AND STABILITY
None
Date:
January 1, 1964
Creator:
Fleischman, Darrell E. & Tollin, Gordon
System:
The UNT Digital Library
THE LUMINESCENCE OF OXINES AND METAL OXINATES
None
Date:
January 1, 1964
Creator:
Bhatnagar, D C & Forster, L S
System:
The UNT Digital Library
MOLECULAR COMPLEXES OF FLAVINS AND PHENOLS. I. ABSORPTION SPECTRA AND PROPERTIES IN SOLUTION
None
Date:
January 1, 1964
Creator:
Fleischman, Darrell E. & Tollin, Gordon
System:
The UNT Digital Library
KINETICS OF SECONDARY REACTIONS IN IRRADIATED POLYETHYLENE. Final Report, May 1, 1966--August 31, 1967.
None
Date:
January 1, 1968
Creator:
Bodily, David M.
System:
The UNT Digital Library
Progress Report for Period Covering December 17, 1969 - January 15, 1960
As reported in the previous Progress Report (December 16, 1959) a stock solution of Th 230 was prepared from pitchblende. Pulse height analysis of this solution indicated the presence of only Th 230 (93%), Th 227 (5%), Th 232 (1%), and Th 228 (1%). This solution was used to make up synthetic thorium solution of various concentration. These synthetic solutions were analyzed to establish a chemical yield for the procedure. Neither the precision nor the chemical yield of the procedure were considered to be satisfactory. In the next report period, we hope to complete the testing of the thorium procedure, both with regard to chemical yield and precision, as well as to determine decontamination factor from radium, uranium, and polonium. To do this, pure solutions of polonium, radium, and uranium will be prepared. The polonium and radium will be processed from pitchblende while the uranium will be made by purifying reagent grade uranyl nitrate.
Date:
January 15, 1960
Creator:
Petrow, Henry G.
System:
The UNT Digital Library
Valley-fill sandstones in the Kootenai Formation on the Crow Indian Reservation, south-central Montana. Quarterly report, October 1--December 31, 1996
Field investigation of the Kootenai valley-fill sandstones was begun in the first quarter. About one half of the outcrop belt was inventoried for occurrences of channel sandstone before heavy snows came to the area. Five exposures of valley-fill sandstone have been located, of these two are 15 meters (50 feet) or greater in thickness and have excellent porosity and permeability. These will be measured and studied in detail during the next field season (1997). No further field work was possible during the second quarter because of snow cover. Subsurface data is being collected, organized, and a digital database is being prepared for the project. A collection of most of the oil and gas well logs for the Crow Reservation area was donated to the project by a company that had initiated an exploration program on the reservoir several years ago. Geographix petroleum software will probably be used to manage and manipulate the data. Regional subsurface cross sections are being constructed for correlation purposes. All of the four 30 ft. x 60 ft. geologic quadrangles, the Billings, Bridger, Hardin, and Lodge Grass, have been scanned to produce a digital surface geologic data base for the Crow Reservation. These maps are currently …
Date:
January 3, 1997
Creator:
Lopez, D. A.
System:
The UNT Digital Library
CHLOROPHYLL ONE-ELECTRON PHOTOCHEMISTRY: FLASH PHOTOLYSIS STUDIES OF THE CHLOROPHYLL--QUINONE REACTION IN ALCOHOL SOLVENTS.
None
Date:
January 1, 1971
Creator:
White, Robert A. & Tollin, Gordon
System:
The UNT Digital Library
Radioactive Drug Research, Final Summary Report, July 1949 to October 1959
Applications of radioisotopes in the preparation of labeled drugs are reviewed. Among the applications described are the preparation of carbon-14- labeled cardiac glycosides, and the biosyinthesis of carbon-14-labeled digitoxin, morphine, colchicine, atropine, podophyllotoxin, and nicotine. The fate and metabolism of many of these drugs were traced. Radiochemical procedures were developed for the synthesis of pure compounds of pharmacological interest labeled with carbon-14, sulfur-35, and tritium. Investigations were made on the phenomena of drug penetration into the central nervous system. Publications during the period are listed. (C.H.)
Date:
January 15, 1960
Creator:
Geiling, E. M. K. (Eugene Maximilian Karl), 1891-1971 & Roth, Lloyd J. (Lloyd Joseph), 1911-
System:
The UNT Digital Library
Operation Pre-Gnome: Seismic Data from Natural Phenomena and High-Explosive Tests Near Carlsbad, New Mexico
Formulas derived from earlier work satisfactorily predicted low frequency ground effects resulting from the Pre-Gnome explosions, but they not predict high accelerations associated with high frequency ground waves. The Pre-Gnome experiments taken since indicated that accelerations and ground amplitudes are proportional to the explosive charge, but physical conditions limit extrapolation on this basis to relatively low yields. Predicted accelerations resulting from the 10 kt Gnome explosion in potash mines eight or more miles away will be somewhat less than from routine blasts in the mines. The compressional wave speed in the salt stratum of the area is about 14,000 feet per second.
Date:
January 12, 1960
Creator:
Carder, Dean S.; Murphy, L. M.; Cloud, W. K. & Pearce, T. H.
System:
The UNT Digital Library