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Radium Determination by Alpha Counting (Final Report)

Description: Abstract: A method is described for the determination of radium by alpha counting. A dilute hydrochloric acid solution of the radium sample is passed through a short column of copper powder to remove polonium. The effluent is mounted on glass slides and alpha counted four to five hours after mounting. Twenty-four hours after mounting, the slides are counted again, and the percentage increase in counts is used to determine a correction factor for the growth of radon and its daughters. Precision and accuracy are within the limits of the counting instrument used.
Date: March 15, 1952
Creator: Kirby, H. W.
Partner: UNT Libraries Government Documents Department

A Rapid Sensitive Direct Method for the Routine Determination of Radium in Urine and Other Biological Materials

Description: Report discussing a method for determining the amount of radium that may have accumulated in the body of an individual by the direct counting of alpha particles from radium in biological materials such as urine.
Date: February 28, 1950
Creator: Russell, Edwin R.; Lesko, Roman C. & Schubert, Jack
Partner: UNT Libraries Government Documents Department

Determination of Radium in Residues : Dissolution of the Sample in Condensed Phosphoric Acids

Description: "The method described was developed for the determination of radium in residues containing silica, berium and lead sulfates, and other oxides and sulfates. The sample is heated in a platinum vessel with orthophosphoric and hydrofluoric acids on continued heating, silica, excess HF, and sulfate are eveolved and the resultant clear, viscous melt is completely soluble in water. Radium may be determined in an appropriate aliquot of this solution by the standard barium chlorids carrier precipitation procedure."
Date: 1952
Creator: Wamser, C. A.; Bernsohn, Edward; Keeler, R. A. & Onacki, John
Partner: UNT Libraries Government Documents Department

Radium-Barium Separation Process: Part 2 - Chromate Fractionation Procedures

Description: Abstract: A comprehensive study was made of various fractionation systems for the fractional separation of barium-radium mixtures. The most efficient and simplest fractionation scheme was chosen on the basis of the thermodynamics of separating the constituents of mixed crystals and of the combining fractions in a system of repeating composition. This scheme was applied to the separation of barium and radium by utilizing the countercurrent batch fractionation of the chromates. The chromate procedure was evaluated by a comparison with the classic methods which employ the fractional crystallization of the halides. The chromate method is more practical on the basis of radium enrichment per fractionation step, control of precipitating conditions, simplicity, and speed of operation.
Date: April 1, 1951
Creator: Salutsky, Murrell Leon; Stites, J. G. & Joy, E. F.
Partner: UNT Libraries Government Documents Department

Summation Report: Recovery of Radium From K-65 Residue (23-E): Job 23

Description: Abstract: "Methods for recovering radium from K-65 residue have been investigated. A process using Versene was developed and demonstrated on a laboratory scale. In this process K-65 residue is leached with Versene solution and radium is adsorbed from the leach liquors and purified by the use of cation exchange resin."
Date: February 12, 1952
Partner: UNT Libraries Government Documents Department

Radium on soil mineral surfaces: Its mobility under environmental conditions and its role in radon emanation. Final report

Description: The ultimate source of {sup 222}Rn to the atmosphere is, of course, {sup 226}Ra. Tracking the mobility of radium therefore is part of the story of radon flux assessment. The study of radium mobility and radon flux measurements has involved virtually all the reservoirs at the Earth`s surface. These include soils, groundwaters, coastal waters and the atmosphere. The attempt to understand the mobility of radium involved the study of almost all the radium isotopes ({sup 226}Ra, {sup 228}Ra, {sup 224}Ra) and the parent and daughters of these isotopes.
Date: August 1, 1997
Creator: Turekian, K.K.
Partner: UNT Libraries Government Documents Department

Report for General Research December 26, 1950 to April 16, 1951

Description: A report of quarterly results of research and development directed towards establishing new techniques and instruments towards improving present methods for determining levels of radioactivity accurately and safely.
Date: 1950~
Creator: Baker, W. H.; Combs, J. F.; Rogers, A. J.; Curtis, M. L.; Gray, M. I.; Olt, R. G. et al.
Partner: UNT Libraries Government Documents Department


Description: This report covers studies of the excretion and retention of 'tracer' and toxic doses of the 11.2-day Ra{sup 223} isotope, its acute toxicity (organ weight changes, gross and microscopic pathology, and Fe{sup 59} utilization by the bone marrow), and long-term histopathological changes and alterations in the hemogram.
Date: February 21, 1958
Creator: Durbin, Patricia; Durbin, Patricia W.; Asling, C. Willet.; Jeung, Nylan; Williams, Marilyn H.; Post, James. et al.
Partner: UNT Libraries Government Documents Department

Research in Radiobiology. Annual Report of Work in Progress on the Chronic Toxicity Program

Description: Separate abstracts were prepared on 8 sections of this report. Data are also included on the status of dogs at various time intervals following the injection of various doses of Ra/sup 226/, Pu/sup 239/, Ra/sup 228/, Th/sup 228, and Sr/sup 90/. (C. H.)
Date: March 31, 1962
Creator: Dougherty, T. F.
Partner: UNT Libraries Government Documents Department

Comparison of the Isotopic Abundance of U^235 and U^238 and the Radium Activity Ratios in Colorado Plateau Uranium Ores

Description: From abstract: "The isotopic abundances of uranium and the radium activity ratios of 11 samples of uranium ore from the Colorado Plateau have been measured." Experimental data and discussion is included with information regarding the samples used.
Date: May 1956
Creator: Senftle, F. E.; Stieff, Lorin; Cuttitta, Frank & Kuroda, P. K.
Partner: UNT Libraries Government Documents Department

Predicting New Hampshire Indoor Radon Concentrations from geologic information and other covariates

Description: Generalized geologic province information and data on house construction were used to predict indoor radon concentrations in New Hampshire (NH). A mixed-effects regression model was used to predict the geometric mean (GM) short-term radon concentrations in 259 NH towns. Bayesian methods were used to avoid over-fitting and to minimize the effects of small sample variation within towns. Data from a random survey of short-term radon measurements, individual residence building characteristics, along with geologic unit information, and average surface radium concentration by town, were variables used in the model. Predicted town GM short-term indoor radon concentrations for detached houses with usable basements range from 34 Bq/m{sup 3} (1 pCi/l) to 558 Bq/m{sup 3} (15 pCi/l), with uncertainties of about 30%. A geologic province consisting of glacial deposits and marine sediments, was associated with significantly elevated radon levels, after adjustment for radium concentration, and building type. Validation and interpretation of results are discussed.
Date: May 1, 1998
Creator: Apte, M.G.; Price, P.N.; Nero, A.V. & Revzan, K.L.
Partner: UNT Libraries Government Documents Department