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124
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57
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54
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50
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45
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The Determination of Fission Product Gamma Doses
In this paper arbitrary limits of the general fission source gamma problem are set. Then, by assuming cooling of at least one day, it is shown that only twelve different fission product gamma sources need ever be considered.
Date:
February 25, 1957
Creator:
Ruehle, William G.
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 47, Number 8, Pages 821-1020, February 25, 2022
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
February 25, 2022
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Stored Energy in BNL Reactor Graphite
Radiation damage to graphite has several consequences of practical importance. The growth of graphite under radiation (Wigner's disease) in production reactors has always been a serious concern. The thermal conductivity of graphite decreases greatly with time of irradiation and is important in long range studies of reactor temperature problems.
Date:
February 25, 1953
Creator:
Chernick, J.
Object Type:
Report
System:
The UNT Digital Library
Detailed Procedure for K Reactors Rear ace Decontamination by Chemical Flush or the Rear Crossheaders, Pigtails and Nozzles as Authorized by the Production Test Authorization IP-239-N.
The purpose of this procedure is to present a detailed, chronological presentation of the preliminary decontamination and post decontamination steps necessary to fulfill the requirements of the Production Test Authorization IP-239-N. The procedure attempts to present the required operation in sufficient detail to successfully accomplish the intent of the test. Certain procedures involve operations of a standard nature and have not been elaborated upon to any great extent, as it is expected that the reactor operations and radiation monitoring personnel will implement these instructions according to standard operating procedures.
Date:
February 25, 1959
Creator:
Crossman, W.A.
Object Type:
Report
System:
The UNT Digital Library
Random Loading of E-Metal Dissolver
Nuclear safety in the dissolution of irradiated 0.95 U235 enriched fuel has been investigated. In particular, critical conditions of fuel of this enrichment in a 52-inch diameter dissolver crib were studied. Since a crib this size is not safe by geometry, dissolution procedures as well as maximum safe batch sizes were analyzed. Uranium-water lattices are normally studied in systems in which rods are uniformly dispersed in the moderator. The results of such a study for 1.34-inch diameter solid rods as well as I. and E. fuel having a 1.37-inch O.D. by a 0.48-inch I.D. have already reported.
Date:
February 25, 1959
Creator:
Ketzlach, M.
Object Type:
Report
System:
The UNT Digital Library
The History of the Brookhaven Biology Department Mouse Colony No. 1 (Swiss-Bridge-Bagg-O'Grady-Walter Reed Strain) With Endemic Occult Cerebral Encephalitozoönosis and Colony No. 2
Innes, Zemen, Frenkel, Borner and Wright (1962) described an outbreak of encephalitozoönosis of the central nervous system in mice, a summary of which is given below for an understanding of why this appendix may be of interest. When the paper was presented for publication, the editors of the journal decided to omit the history of our mouse colony. In our opinion, to understand (a) how this infection may have arisen and (b) may have spread, and still exist in some colonies, it is of prime importance to know the history of this strain of mice used by us (and others). It also has lessons on the establishment and maintenance of so-called "disease-free" or "specific pathogen-free"* colonies of laboratory animals in general. Information on the history of the mice has been culled from Col. H. Yager, VC, Director of the Division of Veterinary Medicine, Walter Reed Army Institute of Medical Research, Washington, D. C., and from Drs, Clara Lynch and John B. Nelson, Rockefeller Institute, New York.
Date:
February 25, 1963
Creator:
Innes, J. R. M. & Borner, G
Object Type:
Report
System:
The UNT Digital Library
Wave Functions for Quadrupole Antishielding Factors
The purpose of this paper is to present tables of the perturbed wave functions which have been recently obtained in a calculation of the quadruple antishielding factors γ∞ for the Mn+2, Fe+3, Ga+3, and Ag+ ions. The wave functions v'1(nℓ-ℓ) which are tabulated represent the effect of the perturbation due to a nuclear quadruple moment Q on the wave functions of the outermost electrons of the ion core.
Date:
February 25, 1963
Creator:
Sternheimer, R. M.
Object Type:
Report
System:
The UNT Digital Library
Fluorimetric Assay of α-Chymotrypsin
The enzymolysis by α-chymotrypsin of the substrates, N-acetyl-L-tryptophane ethyl ester and N-acetyl-L-tyrosine ethyl ester, was followed by means of fluorescence whose intensity increased fourfold and threefold per mole respectively as substrate was transformed into amino acid. The assay by fluorescence was several orders of magnitude more sensitive than the assay by differential absorption spectra of these substances and was in agreement with it in those concentration regions where both methods overlap. To maintain linearity between concentration and fluorescence intensity, the concentration of substrate should be no greater than 10-4 M/1. In such solutions the rate of esterolysis could be followed with the enzyme at 10-11 M/1.
Date:
February 25, 1963
Creator:
Bielski, Benon H. J. & Freed, Simon
Object Type:
Report
System:
The UNT Digital Library
An Isochronal Differential Microcalorimeter
An isochronal differential-type microcalorimeter has been designed and constructed. As a result of its simple design it is very easy to handle the samples and assemble the calorimeter. Important to the operation of the calorimeter is a program, also working on the differential principle, that provides linear temperature rise of the samples. This calorimeter is used to measure very small energy releases such as those found in precipitation, stored energy, etc. It is demonstrated that the calorimeter is easily capable of measuring 0.0005 cal with a probable error of the order of 1% to 2%.
Date:
February 25, 1963
Creator:
Arndt, R. A. & Fujita, F. E.
Object Type:
Report
System:
The UNT Digital Library
A Re-Analysis of Short-Range Order in Cu3Au
Cowley's measurements of the short-range order parameters, αi, in Cu3Au at T=405°C have been re-evaluated taking into account the effects of thermal vibrations and static displacements due to differing atomic sizes. The separate corrections for the thermal vibrations and the first-neighbor atomic size factor are found to be quite large, demonstrating their importance in the usual experiments. When combined, the corrections in this case largely cancel, and only the values of α1 and α3 are appreciably changed. The corrected values are: α1= -.113, α2= +.185, α3= -.009, α4= +.082, α5= -.058.
Date:
February 25, 1963
Creator:
Walker, C. B. & Keating, D. T.
Object Type:
Report
System:
The UNT Digital Library
Antibody Formation by Transplanted Bone Marrow, Spleen, Lymph Node and Thymus Cells in Irradiated Recipients
The role of the marrow as a site for antibody formation has been considered for many years. In 1912 Ludke reported the appearance of antibody in cultures of marrow cells obtained from previously immunized rabbits. Specific agglutinins for killed typhoid bacilli and lysins for ox red cells and sheep red cells were detected in the culture media 2 to 5 days later. However, the cultured cells failed to produce antibody when these antigens were added to the media. Similar findings by Reiter, Przygode, and Schilf appeared in the early literature with regard to the appearance of antibodies to various antigens in tissue cultures of bone marrow from immunized animals, along with failure to elicit antibody formation by addition of antigen to the culture resulted from the addition of excess amounts of antigen, so that if antibody synthesis occurred, the excess antigen combined with antibody and significant amounts of free antibody could not be detected in the culture media. Thorbecke and Keuning observed an increase in antibody in culture fluids when bone marrow fragments from rabbits immunized to paratyphoid B vaccine were cultured in roller tubes.
Date:
February 25, 1963
Creator:
Stoner, Richard D. & Bond, Victor P.
Object Type:
Report
System:
The UNT Digital Library
Bromine Exchange in Graphite-Bromine Lamellar Compounds
A kinetic study of the exchange of normal and radioactive bromine in graphite-bromine lamellar compounds has been made at temperatures of 30° to 50°C. Natural and synthetic graphite powders were investigated. Two alternative mechanisms for the exchange, volume diffusion and surface exchange, were considered. The data were in better agreement with the diffusion mechanism. Diffusion coefficients of 10 -9 to 10 -8 cm2/sec and an activation energy of 11 to 14 kcal/mole were calculated for the natural graphite powders. The diffusion coefficients increased with increasing bromine content. Reversibly absorbed bromine exchanged more rapidly than irreversibly absorbed bromine.
Date:
February 25, 1963
Creator:
Aronson, Seymour
Object Type:
Report
System:
The UNT Digital Library
Crystal Structure of a Sodium Cobalt Molybdate
The cobalt and molybdenum positions had been derived from a three-dimensional Patterson function based on complete data out to λ-1 sin θMo≈ 1. From the separation of the separation of the Mo atoms it was thought that the structure contained free, unlinked MoO4 -2 ions, and this, together with the observed density and analyses for Co and Mo, suggested that the composition was probably Co2(MoO4)3. The paucity of structural information on complex oxide systems and the interesting properties, both structural and physical, of such systems prompted the present, detailed refinement of the structure. The result is more complicated and more interesting than had been anticipated: from the analysis of the X-ray data the compound is found to be NaCo2.31(MoO4)3, and this composition is consistent with chemical analyses. The structure shows several interesting features, including the partial occupancy of cobalt atoms in two independent CoO6 octahedral sites. In one arrangement of CoO6 octahedra there is the not too common face sharing to form infinite columns; in the other arrangement a zig-zag sheet, as far as we know differing from anything thus far reported, is formed by the sharing of edges and corners.
Date:
February 25, 1963
Creator:
Ibers, James A. & Smith, G. W.
Object Type:
Report
System:
The UNT Digital Library
Electric Currents, Membranes, and Biological Sources of Electromotive Force
The analysis of closed circuit systems in which spontaneous steady-state electric currents appear can be carried out with the use of the function [function not transcribed]. The analysis indicates that any open circuit system of the form. Phase 1, barrier 1, phase 2, ......, phase b, barrier b, phase 1' is a chemical source of electromotive force when the phase 1 and 1' are identical, when the system contains two or more barriers whose sets of ionic transport members are different, and when the system is composed of two or more phases whose chemical properties are different. A general expression for the electromotive force of model systems composed of homogeneous phases and biological membranes in linear array can be written as [expression not transcribed] in which the indicated summations are to be performed for all barriers and for all ions to which each barrier is permeable.
Date:
February 25, 1963
Creator:
Nims, Leslie F.
Object Type:
Report
System:
The UNT Digital Library
Foam Suppression of Radioactive Iodine and Particulates
" A reliable, efficient and economical method is needed to remove radioactive halogens such as iodine and bromine and particulates from air in many atomic energy installations. One method we have developed which is particularly suited to reactor containment vessels or other large confined areas is foam containment. In this method an ether lauryl sulfate foam containing an iodine reactant is generated, rapidly filling the entire containment volume. This provides a tremendous surface area to which the encapsulated gases and particles can diffuse and be removed."
Date:
February 25, 1964
Creator:
Yoder, Robert E.; Fontana, Mario H. & Silverman, Leslie
Object Type:
Report
System:
The UNT Digital Library
Eta Temperature Effect
The temperature coefficient of eta has been measured with the thermal column of the Argonne pile using uranium foils of different isotopic ratios. The temperature change was effected by filtering neutrons through silver. The measured fractional change per degree centigrade is [formula].
Date:
February 25, 1944
Creator:
Bragdon, E. W.; Hughes, D. & Marshall, John
Object Type:
Report
System:
The UNT Digital Library
Calculations for Some Pile Shapes of Which the Boundaries are Partly Spherical
Some methods for calculating the k requirements of various shaped piles are indicated, with particular reference to the shape of the tank in the homogeneous plant.
Date:
February 25, 1944
Creator:
Young, G.; Murray, F. H. & Castle, H.
Object Type:
Report
System:
The UNT Digital Library
Calcium Oxalate Carrier Precipitation of Pu
This technical report describes a plant-scale procedure for concentrating plutonium and americium in slag and crucible (metal reduction residues) and other recovery solutions by a calcium oxalate carrier precipitation Conclusions from exploratory laboratory tests on the variables affecting the efficiency are included.
Date:
February 25, 1954
Creator:
Maraman, W. J.
Object Type:
Report
System:
The UNT Digital Library
A Modification of the Norelco Diffractometer for the Identification of Phases in Metallographic Specimens
A modification of the specimen support for the Norelco diffractometer permits X-ray diffraction studies to be made of specimens prepared for metallographic examination. The unit has been successfully used to identify phases present in specimens of plutonium-uranium alloys.
Date:
February 25, 1952
Creator:
Stambaugh, C. K. & Whyte, D. D.
Object Type:
Report
System:
The UNT Digital Library
Automobile Road-Light.
Patent for an automobile road-light improvement that causes the lights of a moving vehicle to move in conformity of the vehicle itself. The device is readily attachable to automobiles of standard type.
Date:
February 25, 1919
Creator:
Tausch, Joseph H.
Object Type:
Patent
System:
The Portal to Texas History
Copy Holder for Stenotyped Notes
Patent for a stenotyped note copy holder.
Date:
February 25, 1919
Creator:
Hoyl, A. G.
Object Type:
Patent
System:
The Portal to Texas History
Printing Appliance
Patent for a printing appliance meant to the improve the functionality of a printer.
Date:
February 25, 1919
Creator:
Johnson, S. T.
Object Type:
Patent
System:
The Portal to Texas History
Toy.
Patent for a toy consisting of two movable figures stationed on a circular base. One figure is hinged using a cord that passes through the base and can be pulled or retracted to allow the figure to collapse and spring upright. The second figure has a spring operated arm to strike and knock down the first figure.
Date:
February 25, 1919
Creator:
Fermier, Victor E.
Object Type:
Patent
System:
The Portal to Texas History
Grain-Harvester.
Patent for an improved grain harvester design.
Date:
February 25, 1919
Creator:
Wells, Homer C.
Object Type:
Patent
System:
The Portal to Texas History