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Preliminary Estimate of the Cost of Production of 10% Isotopic Purity Oxygen-17 by Chemical Exchange
An order of magnitude estimate was made to determine a minimum cost for 10% pure oxygen-17 when produced by a chemical exchange process. the calculations were based on separations factors of 1.03, 1.01, and 1.003. the cost of product was found to vary from $23 per gram for the large factor to $165 per gram for the smaller.
Date:
February 1, 1957
Creator:
Klima, B. B.
Object Type:
Report
System:
The UNT Digital Library
Operation Lone Star Dispatch, Volume 1, February 2022
Newsletter of the Texas Military Department discussing news and activities of the organization as well as other information related to Texas defenses and military updates.
Date:
February 1, 2022
Creator:
Texas Military Department
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Newsletter of Texas State Representative Sam Harless, February 2022
Newsletter of district 126's state representative, Sam Harless. This issue discusses the winter weather Texas experienced in early 2022 and other local concerns.
Date:
February 1, 2022
Creator:
Harless, Sam
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Beyond the Numbers, Volume 2, Number 2, February 1999
Periodic paper series discussing information about occupational training, labor markets, and related information in Texas.
Date:
February 1, 1999
Creator:
Anderberg, Marc; Campbell, Robin & Lewis, Norman, Jr.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Achieve!, February 1, 1991
Periodic newsletter discussing information related to student drop-out rates, relevant legislative issues, and prevention programs. This issue focuses on technology's role in schools.
Date:
February 1, 1991
Creator:
Texas Research League
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The ECHO, Vol. 90, No. 1, Ed. 1 Thursday, February 1, 2018
Monthly newspaper produced for inmates in the Texas criminal justice system containing news stories, policy updates, opinion pieces, creative works, and other information.
Date:
February 1, 2018
Creator:
Texas. Department of Criminal Justice.
Object Type:
Newspaper
System:
The Portal to Texas History
The ECHO, Vol. 89, No. 1, Ed. 1 Wednesday, February 1, 2017
Monthly newspaper produced for inmates in the Texas criminal justice system containing news stories, policy updates, opinion pieces, creative works, and other information.
Date:
February 1, 2017
Creator:
Texas. Department of Criminal Justice.
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Commission on Jail Standards Annual Report: 2020
Annual report of the Texas Commission on Jail Standards outlining organizational information, data regarding performance and operations, and other information for calendar year 2020.
Date:
February 1, 2021
Creator:
Texas Commission on Jail Standards
Object Type:
Report
System:
The Portal to Texas History
Texas Commission on Jail Standards Annual Report: 2019
Annual report of the Texas Commission on Jail Standards outlining organizational information, data regarding performance and operations, and other information for calendar year 2019.
Date:
February 1, 2020
Creator:
Texas Commission on Jail Standards
Object Type:
Report
System:
The Portal to Texas History
Texas Commission on Jail Standards Annual Report: 2017
Annual report of the Texas Commission on Jail Standards outlining organizational information, data regarding performance and operations, and other information for calendar year 2017.
Date:
February 1, 2018
Creator:
Texas Commission on Jail Standards
Object Type:
Report
System:
The Portal to Texas History
Texas Commission on Jail Standards Annual Report: 2018
Annual report of the Texas Commission on Jail Standards outlining organizational information, data regarding performance and operations, and other information for calendar year 2018.
Date:
February 1, 2019
Creator:
Texas Commission on Jail Standards
Object Type:
Report
System:
The Portal to Texas History
Preliminary Hazards Summary Report For The Vallecitos Superheat Reactor
This Preliminary Hazards Summary Report has been prepared for submission to the United States Atomic Energy Commission in compliance with Part 50 of the regulations governing the licensing of production or utilization facilities, pursuant to the Atomic Energy Act of 1954, as amended, and contains the general information required by 10 CFR 50.34.
Date:
February 1, 1961
Creator:
General Electric Company
Object Type:
Report
System:
The UNT Digital Library
Sabine River Authority of Texas Comprehensive Annual Financial Report: 2019 and 2020
This Report describes the management’s discussion and analysis which can be found in the financial section immediately following the auditors’ opinion letter. The management’s discussion and analysis provides an overview of the Authority’s financial activities and should be read in conjunction with the financial statements. The Statistical Section includes selected financial and demographic information.
Date:
February 1, 2021
Creator:
Sabine River Authority of Texas
Object Type:
Report
System:
The Portal to Texas History
Sabine River Authority of Texas Comprehensive Annual Financial Report: 2017 and 2018
This Report describes the management’s discussion and analysis which can be found in the financial section immediately following the auditors’ opinion letter. The management’s discussion and analysis provides an overview of the Authority’s financial activities and should be read in conjunction with the financial statements. The Statistical Section includes selected financial and demographic information.
Date:
February 1, 2019
Creator:
Sabine River Authority of Texas
Object Type:
Report
System:
The Portal to Texas History
Enthalpies and Heat Capacities of Solid and Molten Fluoride Mixtures
The enthalpies and heat capacities of seventeen fluoride mixtures in the liquid state have been determined using Bunsen Ice Calorimeters and copper block calorimeters. The fluoride mixtures were composed of the fluorides of two or more of the following metals: lithium, sodium, potassium, beryllium, zirconium, and uranium. The enthalpies and heat capacities of most of these mixtures were studied in the solid state also. Estimates of the heat of fusion have been made. General empirical equations have been developed which represent the enthalpies and heat capacities of the fluoride mixtures in the liquid and in the solid state.
Date:
February 1, 1956
Creator:
Powers, W. D. & Blalock, G. C.
Object Type:
Report
System:
The UNT Digital Library
Interim Report -- The Retention of Particles in Ducts Transporting Aerosol Streams
Accurate sampling of particulate in gaseous effluents is required for auditing and control of radioactive wastes released to the environment at installations generating or processing radioactive materials. Over the years a variety of sampling probe configurations, sampling velocities, lengths and sizes of sample delivery lines have been used locally to obtain these samples. Efforts to properly evaluate the validity of samples in most sampling installations have been hampered by a lack of basic knowledge of particle behavior under the various conditions imposed. Important variables about which minimal knowledge is available are those of particle impaction and retention on and re-entrainment from the walls of sampling lines. In some sampler configurations the effect of these parameters on sampling validity may be made negligible, but in lines already in place. or where long sampling lines are required, the degree to which deposition affects the sampling validity must be established. Deposition and rebuild up, then rapid release to the air stream. Research has been initiated in Hanford Laboratories Operation to provide the required data relative to deposition and retention on conduit walls and to eventually arrive at approved sampling system configurations.
Date:
February 1, 1960
Creator:
Postma, A. K. & Schwendiman, L. C.
Object Type:
Report
System:
The UNT Digital Library
The Use of Tetravalent Uranium and Hydrazine as Partitioning Agents in Solvent Extraction Process for Plutonium and Uranium
In solvent extraction purification processes such as are used at Hanford, the fuel elements or "slugs" from the reactor containing uranium, plutonium, and fission products are dissolved in nitric acid, adjusted to the required feed composition, and pumped to the solvent extraction columns. Figure 1 in a schematic diagram of such a solvent extraction process. In the A column, the uranium and the plutonium are extracted into an organic phase while the bulk of the fission products remain in the aqueous phase and leave as waste with the column raffinate.
Date:
February 1, 1959
Creator:
Buckingham, J.S.; Colvin, C.A. & Goodall, C.A.
Object Type:
Report
System:
The UNT Digital Library
Heat Transfer in Radiant- Heat Spray Calcination
The fixation of aqueous radioactive wastes in a stable solid media by means of calcination has been the subject of considerable research and development effort. Several methods of doing this on a continuous basis have been devised and a few have been demonstrated to be feasible for the handling of non-radioactive or low activity simulated wastes. Currently an investigation of calcination by means of radiant-heat spray drying is being carried on by the Chemical Research Operation of the Hanford Laboratories Operation. The process consists of atomizing the liquid to be treated into the top of a cylindrical column, the walls of which are maintained at a high temperature. The resultant suspension of droplets in the water vapor formed by evaporation passes through successive zones of drying, calcination, possible chemical reaction or melting, and partial cooling as it proceeds down the tower. Separation of the resultant solids, steams, and uncondensable gas is made by conventional methods.
Date:
February 1, 1959
Creator:
Johnson, B.M., Jr.
Object Type:
Report
System:
The UNT Digital Library
The Microbeam as a Tool in Radiobiology
In the analysis of the effect of ionizing radiation on living systems, the problem is complicated by the interaction of one part of the system with other parts. If an entire mouse is subjected to radiation, only a few of the most radiosensitive organs, the "weak links," react to the insult and essentially limit the size of the dose delivered since there is little to be learned from irradiating a dead mouse. Thus an insensitive organ like muscle will not respond at all to a total body dose. Likewise, every organ is composed of several different kinds of cells, and the most radiosensitive cells in the organ will determine the reaction observed.
Date:
February 1, 1963
Creator:
Curtis, Howard J.
Object Type:
Report
System:
The UNT Digital Library
Mitotic Indices of Human Bone Marrow Cells. Duration of Some Phases of Erythrocytic and Granulocytic Proliferation Computed From Mitotic Indices
Data on the mitotic indices of human bone marrow cells were reported in the first paper of this series, and theoretical considerations on the applicability and limitations of the index in determining kinetic parameters were discussed. In the present paper an attempt is made to compute time parameters of normal bone marrow cell proliferation from the data presented in the first paper.
Date:
February 1, 1963
Creator:
Killmann, S. A.; Cronkite, E. P.; Fliedner, T. M. & Bond, V. P.
Object Type:
Report
System:
The UNT Digital Library
The Effects of 250-kv X-Ray on the Dog's Pancreas: Morphological and Functional Changes
Previous investigations that the pancreas is a radioresistant organ. Ivy in 1924 noted the presence of a fibrotic atrophic pancreas in a dog which had received one erythema dose to the epigastrium. Fisher in 1923 reported that four to five erythema doses delivered in a single application caused complete disappearance of the irradiated pancreatic remnant in about two months. These dogs died because of uncontrolled diabetes. One dog that received four erythema doses (possibly 200 r) was sacrificed after five months. At autopsy the irradiated pancreas had disappeared, but 275 mgm of regenerated pancreas were found at the base of the main duct and 100 mgm at the base of the accessory duct. Leven in 1933 implanted radon seeds into the pancreas. Dosages varied from 528 to 1584 millicurie hours. At postmorten the pancreas surrounding the seeds demonstrated fibrous atropy and foci of necrosis. The islets appeared normal but were relatively larger in size. Rauch in 1952 reported that dogs given 200 r in air over the pancreas on alternate days until a total of 1600 r was received failed to show any histological changes after two months. Lushbaugh and Spalding and Lushbaugh reported that over 1500 r of whole-body …
Date:
February 1, 1963
Creator:
Archamefau, John; Griem, Melvin & Harper, Paul
Object Type:
Report
System:
The UNT Digital Library
Elimination of Phases the Life Cycle of Leukemic Cells From in Vivo Labeling in Human Beings With Tritiated Thymidine
Our earlier in vitro studies have suggested that malignant tumors may not produce new cells more rapidly than normal cells are produced in the "steady state" equilibrium. Obviously tumors of all typed represent a diversion from "steady state" production with a net gain in mass of tissue. However, the increase in mass is not necessarily constant and may fluctuate in the natural history of the disorder. DNA labeling with tritiated thymidine had made it possible to characterize normal "steady state" hemopoietic growth parameters. We therefore thought it mandatory to extend these techniques to the study of growth rates of human leukemic cells. Also, since current therapy is more or less closely tied to a concept of unrestrained rapid growth, which we in part have begun to question, it appeared wise to look back at the historical development of knowledge about tumor growth. The existence of tumors in man has been known for millenia.
Date:
February 1, 1963
Creator:
Killmann, S. A.; Cronkite, E. P.; Robertson, J. S.; Fliedner, T. M. & Bond, V. P.
Object Type:
Report
System:
The UNT Digital Library
Radiation Effect on the RNA Metabolism of the Central Nervous System
Numerous studies on the effects of radiation on the central nervous system used traditional pathomorphological changes as parameters of radiosensitivity, but pathogenesis and mechanisms of radiation injury to the nervous tissue are still little understood. Furthermore, the great discrepancy of dose requirement leading to physiological responses and on the other hand to pathomorphological changes in the central nervous system is not satisfactorily explained.
Date:
February 1, 1963
Creator:
Yamamoto, Y. L.; Feinendegen, L. E. & Bond, V. P.
Object Type:
Report
System:
The UNT Digital Library
Indirect Effect of X-Radiation on Bone Growth in Rats
It has been known for many years that bone growth may be retarded by relatively large doses of therapeutic radiation. Similar doses of radiation have also shown retarded growth in animals. More recently, reports of studies of Japanese children exposed to the Atomic Bomb Detentions at Hiroshima and Nagasaki and Marshallese children exposed to radiation in the fallout accident of 1954 have indicated some impairment in their growth and development, possibly related to radiation exposure. Since the doses of radiation received by these children were lower than would be expected to produce retardation of bone growth by direct irradiation, it was considered that indirect mechanisms might play a part. This preliminary report summarizes investigations of possible indirect effects of X-irradiation in bone growth in rats.
Date:
February 1, 1963
Creator:
Conard, R. A.
Object Type:
Report
System:
The UNT Digital Library