Search Results

open access

Summary of Sons of the American Revolution Youth Contests

Description: Document containing a chart that summarizes several youth contests held by the Sons of the American Revolution Arlington Chapter.
Date: February 22, 2016
Creator: Texas Society Sons of the American Revolution, Arlington Chapter 7
Partner: UNT Libraries Special Collections
open access

Metallurgical Laboratory, Chemical Research - Radiation Chemistry, the Effect of Radiation on Water and Aqueous Solutions of Inorganic Substances

Description: Technical report summarizing our knowledge of the chemical effects of ionizing radiation upon water and upon aqueous solutions of inorganic compounds. The types of radiation considered are beta rays, gamma and X rays, and heavy particles, notably neutrons, deuterons, alpha rays and fission recoils.
Date: February 22, 1944
Creator: Allen, A. O.
Partner: UNT Libraries Government Documents Department
open access

Metallurgical Laboratory, Chemical Research - Analytical, Graphite Purity Research Program

Description: Abstract. Chemical analytical studies of graphite raw materials have revealed new sources of petroleum cokes and pitches of greater purity than those previously used in the manufacture of project graphite. The use of these raw materials of exceptional purity has resulted in an improvement in k of the order of one per cent as compared with the AGOT-AGNT graphite typical of the previous production. A study of the graphitizing process has shown that no dangerous impurities are introduced in the graphite in manufacture; rather, the process actually purifies. furthermore, impurities are distributed homogeneously within the furnace charge; thus the AGOT-AGNT distinction is no longer necessary. A comparison of the methods of graphite testing has demonstrated excellent correlations between chemical analytical data, the results of the function test at Argonne, and the sigma pile experiments. It may therefore be inferred that chemical testing should be an adequate control of the graphite purity. Methods are described for the analysis of ash, B, V, TI, FE, and Ca in petroleum coke, pitch, and graphite.
Date: December 22, 1943
Creator: Boyd, G. E.; Curtis, R. E. & Johnston, W. H.
Partner: UNT Libraries Government Documents Department
open access

[NTIEVA FY98 financial report, faxed to Don Killeen from D. Jack Davis]

Description: A document outlining the North Texas Institute for Educators on the Visual Arts FY 98 financial report, faxed to Don Killeen from D. Jack Davis. Sections are listed as follows: "North Texas Institute for Educators on the Visual Arts FY 98 Continuing Getty Expenditure Report"; "North Texas Institute for Educators on the Visual Arts FY 98 New Getty Expenditure Report"; "Continuing Getty Funds"; and "New Getty Funds."
Date: January 22, 1999
Creator: North Texas Institute for Educators on the Visual Arts
Partner: UNT Libraries Special Collections
open access

The X-Ray Spectra of the Last-Row Elements

Description: Abstract: X-ray energy level diagrams as given in the literature are tabulated for radium, thorium and uranium. A level scheme for protoactinium is derived from the published data. After a brief review of the use of X-ray data in studying outer electronic structure, it is pointed out that differences in the X-ray spectra should exist depending on whether the outer electrons are in f or d orbitals. The observed separation of the OI and OII levels in thorium and uranium indicated that the f levels lie lower than the d. This hypothesis also provides a reasonable explanation for the observed differences between the MIV and MV absorption edges and MIV and MV levels calculated from the emission spectra and the LIII edge.
Date: October 22, 1946
Creator: Russell, H., Jr.
Partner: UNT Libraries Government Documents Department
open access

A Fast Coincidence Circuit with Pulse Height Selection

Description: Abstract: The output signal of a linear accelerator may have a rise time of 1-2 x 10[minus]7 seconds. Therefore, the output of a pulse height selector operating on this signal has a variation of delay from the original signal of about this amount. In the instrument to be described in this technical report this difficulty is largely resolved.
Date: April 22, 1947
Creator: Bell, P. B.; DeBenedetti, Sergio & Francis, J. B., Jr.
Partner: UNT Libraries Government Documents Department
open access

Wet Fluoride Studies: Calcium Plutonium (IV) Fluoride

Description: Laboratory studies have shown that the double salt, CaF2-PuF4, can be precipitated by rapid addition of hydro-fluoric acid to solutions containing 25 to 75 g Pu/1, caleium equimolar to plutonium, and 1 to 10 M HNO3. The precipitate, which is subsequently washed with water and dried to 300 degrees C in dehumidified, deoxygenated argon, can be reduced thermally by calcium to give high yields of plutonium metal.
Date: December 22, 1953
Creator: Branin, P. B.
Partner: UNT Libraries Government Documents Department
open access

The Enhancement of Acidity of Very Weak Acids in Tertiary Butyl Alcohol

Description: Technical report. From Abstract : "The acidity of a solution of acid, HX, and salt, MX, is affected by both the concentration of X- and M+ owing to incomplete dissociation of the salt, MX. it was possible to increase the acidity of a solution of 2,6-di-tert-butylphenol - tetrabutylammonium 2,6-di-tert-butylphenolate relative to a dilute solution of tetrabutylammonium hydroxide by increasing the tetrabutylammonium bromide content. This indicates that the dissociation constant of the hydroxide base is sufficiently large that extensive dissociation occurs in dilute solutions. The addition of tetrabutylammonium bromide is therefore recommended as a general method for increasing the acidity and improving the titration characteristics of extremely weak acids."
Date: October 22, 1962
Creator: Marple, Leland & Fritz, J. S.
Partner: UNT Libraries Government Documents Department
open access

Summary of the Research Progress Meeting

Description: Technical report includes three reports of research progress: 1) Range Measurements on 190 Mev Deuterons, M. Stephan; 2) Meson measurements, C. Lattes; and 3) N-P Scattering, R. Christian.
Date: April 22, 1948
Creator: Wakerling, R. K. (Raymond Kornelious), 1914-
Partner: UNT Libraries Government Documents Department
open access

The Effects of Fast Neutrons on the Ability of Mice to Take Forced Exercise

Description: From abstract: "In an attempt to gain some insight into the physiological condition of mice surviving massive doses of radiation, a study of their vitality was undertaken. It was assured that the ability of these animals to do forced work would be a measure of their vitality, Stimulating exposed animals to run in exercise wheels to their fullest capacity, has resulted in a demonstration of a striking vitality less during a post-irradiative period, when no other effects are demonstrable by gross examination. Mice subjected to a medium-lethal dose of fast neutrons show a continuous vitality loss over a 300 day period following exposure. Control animals show no appreciable loss of vitality up to about 8 months of age, after which a gradual loss can be noted, probably due to a normal gereologic process."
Date: August 22, 1946
Creator: Stapleton, G. K. & Curtis, H. J.
Partner: UNT Libraries Government Documents Department
open access

Decontamination of Portable Instruments

Description: The decontamination of portable instruments by the Calibration Unit has presented a problem for some time. Most of the contamination is in the 100 to 500 c/m or 500 to 2000 d/m range. Higher levels of contamination can usually be reduced to these levels, but further cleaning proves quite difficult
Date: May 22, 1953
Creator: Unruh, C. M.
Partner: UNT Libraries Government Documents Department
open access

MTA Target Equations

Description: In solving the two-group, two medium equations for neutron diffusion in a finite one-dimensional multiplying system, the equations in each medium can be solved, and the boundary conditions used to determine the coefficients. This direct attack involves eight simultaneous linear equations. The opportunities for error are numerous, and, frequently, a great deal of accuracy is lost by subtractions; hence, it is felt that an alternative method of solution, in which numerical errors would be less likely to occur, would be desirable.
Date: May 22, 1952
Creator: Kramer, H. P. & Adelman, F.
Partner: UNT Libraries Government Documents Department
open access

Appendix B-3. Statistical Summary of Hydrochemical Data from Ground and Surface Water Samples, Ekalaka, Montana/North Dakota/South Dakota Quadrangle

Description: Appendix containing a statistical summary of hyrogeochemical data from ground and surface water samples to accompany a report on U.S. uranium resources in the Ekalaka Quadrangle in Montana, North Dakota, and South Dakota.
Date: February 22, 1980
Creator: Robinson, Keith & Adkisson, Cheryl W.
Location: None
Partner: UNT Libraries Government Documents Department
open access

Metallurgy Division Quarterly Progress Report for Period Ending April 30, 1952

Description: This quarterly progress report discusses ongoing work at the Metallurgy Division at the Oak Ridge National Laboratory. Topics discussed include thorium research, the preferred orientation of uranium, studies in the ceramics laboratory, the homogenous reactor program, studies in the x-ray laboratory, studies in the metallographic laboratory, the experimental plate-cladding program, and fuel and control element fabrication.
Date: September 22, 1952
Creator: Frye, John H., Jr., 1908-2001 & Bridge, W. H.
Partner: UNT Libraries Government Documents Department
open access

Mercury Amalgam Bonding of Uranium and Copper

Description: Technical report summarizing one phase of work done to develop methods of bonding uranium to a metal which is a good conductor of heat. Silver was chosen for contact with uranium because it is easy to plate on uranium and there is no danger of brittle Ag-U compounds being formed at elevated temperatures. [From Abstract]
Date: January 22, 1951
Creator: Glasgow, L. G.
Partner: UNT Libraries Government Documents Department
open access

[TDNA Legislative Report, December 2005]

Description: A legislative report for the Texas Daily Newspaper Association board of directors meeting to be held December 1, 2005 at the Headliners Club in Austin, Texas. The purpose of the legislative report is to give the board of directors and the association's members news updates on how the Texas newspaper industry fared during the year.
Date: November 22, 2005
Creator: Texas Daily Newspaper Association
Partner: UNT Libraries Special Collections
Back to Top of Screen