163 Matching Results

Search Results

Results: 1 - 24 next
open access

Preliminary Report on a Colorimetric Method for the Determination of Microgram Quantities of Thorium : Experiments in the Dissolution of O2 Metal [UO2]

Description: Abstract. thorium can be precipitated as a salt of p-dimethylaminoazophenylarsonic acid at a pH of about 1.5. the precipitate, collected on a sintered glass filter is washed with dilute ammonium hydroxide to dissolve the dye. the amount of thorium is determined by measuring the concentration of the dye spectrophotometrically at a wavelength of 450 millimicrons. Zirconium, which interferes, can be separated and determined using the same reagent in strong hydrochloric. the behavior of thorium… more
Date: January 1, 1945
Creator: Byerly, W.; Niedrach, L.; Davin, W.; Dyas, H. & Bane, R. W.
Partner: UNT Libraries Government Documents Department
open access

Metallurgical Laboratory, Chemical Research - Radiation Chemistry, Report for the Period Ending January 15, 1945

Description: Technical report with short reports covering (1) Effect of radiation on water and aqueous systems; (2) Effect of neutrons on graphite; (3) Effect of radiation on solid compounds; and (4) Scattering, stopping-power, ion-pair production, etc.
Date: February 1, 1945
Creator: Burton, Milton, 1902- & Allen, A. O. (Augustine O.)
Partner: UNT Libraries Government Documents Department
open access

A Study of Thorium Peroxide Sulfate

Description: Abstract. Thorium peroxide was precipitated from thorium nitrate solutions containing varying amounts of sulfate ion and of hydrogen ion. The washed solids were analyzed both wet and dry. Analyses were made for thorium, peroxide oxygen, sulfate, nitrate, and water contents. X-ray powder photographs of the dried samples by W.H. Zachariasen showed the presence of only two phases. When precipitated from high sulfuric acid, the solid phase was isomorphous with Th(OO)SO4.3H20. More weakly acid … more
Date: October 1, 1945
Creator: Hamaker, John W.
Partner: UNT Libraries Government Documents Department
open access

The Determination of Tuballoy in the Presence of Thorium in Peroxide Effluents and Cakes

Description: Abstract: "A polarographic method for the determination of tuballoy in thorium peroxide cakes in all sold medium was found to give satisfactory results. Fluorescent analyses on effluents containing thorium gave good results if the thorium content was kept below 1 mg/liter."
Date: February 1, 1946
Creator: Lasko, Wiliam. R. & Susano, C. D.
Partner: UNT Libraries Government Documents Department
open access

The Uranium-Cobalt System

Description: Abstract: "A phase diagram for the uranium-cobalt system has been constructed, based on thermal, microscopic, X-ray and chemical data. The results indicate the existence of three compounds and two eutectics, one of which shows a lowering of the melting point of uranium by approximately 400 C."
Date: March 1, 1946
Creator: Noyce, William Knight & Daane, A. H.
Partner: UNT Libraries Government Documents Department
open access

The Detection of Small Amounts of Fluorine in Large Amounts of Chlorine

Description: Abstract: "Tests have been developed for both the qualitative detection and quantitative determination of fluorine in chlorine. The qualitative test is made by passing the gas through manganous chloride. If the pink solid tubes brown there is greater than 0.5 percent of fluorine in the gas. The quantitative test is a modification of the Steiger and Marvin Test with oxidized titanium solution."
Date: April 1, 1946
Creator: Lafferty, Robert H., Jr. & Winget, Rasho
Partner: UNT Libraries Government Documents Department
open access

Quarterly Report May 1947 to August 1947 : Biology Division

Description: The following documents were compiled into a quarterly report that was to be published in the Radiobiology Volume of the PPR. The following reports provide data from the Biology department of the University of Chicago between May and August of 1947.
Date: August 1, 1947
Creator: Brues, Austin M.
Partner: UNT Libraries Government Documents Department
open access

Quarterly Report August 1947 to November 1947, Biology Division

Description: The following document is a compilation of quarterly reports from August 1946 to November of 1947 from the Biology Division of the University of Chicago.
Date: November 1, 1947
Creator: Brues, Austin M.
Partner: UNT Libraries Government Documents Department
open access

Topical Report on Literature Survey of Treatments for Monazite Sands

Description: The following report covers the literature available in the Battelle library as well as the Atomic Energy Commission (New York, N.Y.) on the processing of monazite sands for thorium and rare earth contents.
Date: November 1, 1947
Creator: Willigman, M. & Slowter, E. E.
Partner: UNT Libraries Government Documents Department
open access

Mound Laboratory Liquid Waste Disposal Research Quarterly Report for April - June, 1950

Description: The following report is a quarterly report conducted by the Monsanto Chemical Company for liquid waste disposal research, covering the period April through June, 1950. This report discusses experiments that were carried out with both neutralized second-cycle wastes and pure isotope which show that, in general, the presence of fluoride ion does not interfere with the removal of fission products from waste solutions.
Date: July 1, 1950
Creator: Monsanto Chemical Company
Partner: UNT Libraries Government Documents Department
open access

An Influence Function for the Beta Activity of Uranium(235) Fission Products

Description: Abstract: "Computations have been made of the total beta activity of the fission products arising from the slow neutron fission of U-235. A curve is given exhibiting the activity the activity per unit fission, for time intervals after fission ranging from 0.01 second to 10 years. This influence function is compared with some published experimental data and with the statistical curve of Way and Wigner. A curve facilitates estimation of the activity in the particular case where the fission rate h… more
Date: September 1, 1950
Creator: Thornton, J. Kendall & Houghton, William J.
Partner: UNT Libraries Government Documents Department
open access

Engineering Study of Evaporation for Concentrating Radioactive Liquid Wastes : Engineering Research Final Report

Description: Summary: "The problem of evaporation of secondary radioactive wastes resulting from waste disposal studies at Mound Laboratoy has been studied experimentally to determine the fundamental design characteristics of a plant size unit. Emphasis, of course, was on decontamination, but the factors affecting foaming and scaling also had to be investigated and evaluated. Generally speaking, the final design is a standard type of evaporator, the only unique feature being the relation of the two effects.… more
Date: November 1, 1950
Creator: Bates, R. L. & McEwen, M.
Partner: UNT Libraries Government Documents Department
open access

Special Report of Problem on AEC Contract AT(30-1)-1024: Measurement of the Dielectric Constant of Molten Slag

Description: Two methods of measuring the dielectric constant of molten slag are described and investigated. The conventional standing wave method is shown to be impractical for the range of conductivities expected. The second method utilizes the attenuation of the electromagnetic energy as it propagates into the slag.This method appears to offer a reasonable chance of success if extreme accuracy is not expected. It suffers from the limitation that the conductivity must be known from some other source.
Date: March 1, 1951
Creator: Anderson, G. M.
Partner: UNT Libraries Government Documents Department
open access

Oak Ridge Static Autoclave Water Decomposition Test

Description: Abstract: "Steady states decomposition product partial pressures of water exposed to an epithermal neutron flux of about 2 x 10-11, at 235F, were 0.4 to 0.65 psi. Recombination studies were made by adding hydrogen and oxygen gases to water under irradiation at different temperature and flux levels. The data show a significant effect of temperature on the rate of pressure drop of the added hydrogen and oxygen. In operating at two flux levels, 1.2 x 10-11 and 2.0 x 10-11, no difference in the rat… more
Date: May 1, 1951
Creator: Humphreys, J. R., Jr.; Abers, E. L. & Brown, P. E.
Partner: UNT Libraries Government Documents Department
open access

Determination of half life of polonium-210 by counting: final report

Description: Introduction: "A number of determination have been made of the half life of polonium-210 by calorimetry. Counting affords an entirely different method of determining half lives and requires only a small amount of activity. Therefore for comparison a half-life determination by counting was undertaken with a sample of approximately 0.5 millicurie of polonium."
Date: June 1, 1951
Creator: Curtis, Mary Lou
Partner: UNT Libraries Government Documents Department
open access

Semi-Annual Report To The Atomic Energy Commission On Contract AT(30-1)910 : February 1, 1952

Description: The Clinical Biophysics program is concerned with metabolic problems and radioactive acetate, glycine, methionine and bicarbanate have been administered to study some of the pathways utilized in humans. Another group is approaching the problem from the viewpoint of mineral metabolism. The Gas Phase counting program has provided many of the sensitive detection techniques required by the other programs.
Date: February 1, 1952
Creator: Sloan-Kettering Institute for Cancer Research
Partner: UNT Libraries Government Documents Department
open access

Ultrasonic Testing of Small-Diameter Tubing

Description: The following report describes the procedure and equipment allowing ultrasonics to be applied successfully to locate flaws in 0.060 in. ID x 0.080 in. OD tubing.
Date: February 1, 1952
Creator: Pardus, A. J.
Partner: UNT Libraries Government Documents Department
open access

Magnet Current Regulation and Metering Circuit

Description: This paper describes a modification that has been made to the magnet current regulator.
Date: May 1, 1952
Creator: Jenkins, Kenneth D.
Partner: UNT Libraries Government Documents Department
open access

The Creation of Sexual Isolation by Artificial Selection

Description: Two laboratory strains of D. melanogaster - Ore R marked with the recessive stw and Florida marked with the recessive se -- were carried in a mixed population through 33 generations. In each generation the percentage of stw, se, and wild-type flies was determined; the wild-type flies were discarded, and the next generation set up with equal numbers virgins of the two recessive strains. In spite of a contamination which brought in double recessive phenotypes from generation 16 on, the percentage… more
Date: August 1, 1952
Creator: King, James C.; Wallace, Bruce. & Wright, Theodore R. F.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen