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Concentration Of Nitrogen 15 By Chemical Exchange Between NO2 And NO

Description: This program was planned to investigate the concentration of Nitrogen 15 by chemical exchange between liquid nitrogen tetroxide and gaseous nitrous oxide. The method used by Grey and coworkers was to be attempted.
Date: 1953
Creator: Spindel, William, 1922-; MacLaren, K. H.; Johns, R. N.; Lenni, R. P.; Reynolds, G. W. & Lanford, O. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Parabolic-Linear Oxidation Rate Transition Theory

Description: A new theoretical concept is proposed to account for the type of oxidation followed by metals upon exposure to an oxidizing atmosphere at elevated temperatures. The hypothesis is based on the relative rates of oxidation and re crystallization of the tarnish coating. if the re crystallization rate of the oxide coating formed on the surface is greater than the oxidation rate of the metal, the coating will be protective and hence will follow the parabolic equation. If the reverse situation is true… more
Date: unknown
Creator: McKewan, William & Fassell, W. Martin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Use of Discharge Tubes in Spectrochemical Analysis

Description: While this survey of discharge tube sources probably has not yielded information of much direct interest to the great majority of analysts, it seems probable that these sources will become of greater interest as they become better developed and more demand is created for extension of spectrochemical methods to non-metallic samples.
Date: February 13, 1962
Creator: Fred, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Self-Delayed Coincidence Circuit

Description: On the assumption that the light pulses from the light guide of a scintillation counter consist of single, widely separated photons, it should be possible to reject them by counting only pulses, with some loss of counting efficiency. An alternate approach is to use a light-splitter, dividing the light between two photomultipliers in coincidence. Many variations of light splitters were tried.
Date: May 1951
Creator: Freedman, M
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of the Shape of Beta Spectra at the Low-Energy End

Description: The applicability of proportional counting to low-energy p-spectra has been demonstrated. As yet, however, nothing has been primarily directed toward the general problem of spectral shapes at the low-energy end. This report attempts to address that and to resolve questions about it experimentally.
Date: February 3, 1951
Creator: Edwards, R. R.; Damon, F. E. & Schwartz, H. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Content of Human Tissues in Eleven Trace Minerals

Description: The project involves analysis of a sufficient number of selected cadavers, and certain tissues therefrom, to indicate the normal occurrence of the following trace minerals in human tissues, concentrations of them that may be considered innocuous, and the variation in these concentrations to be expected with advancing age: boron, beryllium, cobalt, gallium, mercury, polonium, radium, strontium, thorium, uranium and zirconium.
Date: June 15, 1951
Creator: {{{name}}}
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Study of Convex Sets in Abstract Linear Spaces Where No Topology is Supposed. II.

Description: A purely geometrical proof of the hyperflat of support-theorum is indicated, and the Hahn-Banach extension theorum for linear functionals is derived therefrom. An example is given of two linearly closed (and linearly bounded) convex bodies such that their convex hull is not linearly closed. An other example is given of two linearly bounded convex bodies whose convex hull is not linearly bounded.
Date: unknown
Creator: Berg, W. D. & Nikodym, Otton Martin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Study of the Permeability of Plastic Membranes to Gases

Description: It was the primary object of this research to obtain data on the rate of gas permeation through a number of selected plastic membranes at different temperatures and, in particular, to note the effect of varying amounts of plasticizer in the membrane upon the rate of gas permeation.
Date: 1951
Creator: Brubaker, David William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Progress Report on AEC Contract No. AT(40-1)-1076-, 1. The Development of Electromechanical Equipment to Facilitate the Search for Events in Nuclear Emulsions

Description: This portion of the program under the contract has been completed. Subsequent to the preliminary report a new design was drawn up and constructed which embodies highly desirable features indicated by use of the first model. These are summarized here.
Date: 1951
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Hydrogen Fluoride Solvent System: Polarographic Studies

Description: This paper presents preliminary work on the polarographic determination of redex potentials in liquid hydrogen fluoride. The dropping mercury cathode with a mercury pool reference anode proved to be the most practical for the initial experiments. Reduction waves with a rotating platinum cathode versus a mercury pool reference anode gave at best highly inconclusive results for all systems investigated, as did also oxidation waves with a rotating platinum anode versus a hydrogen reference cathode. more
Date: unknown
Creator: Clifford, Alan F. & Balog, George
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Progress Report: Project No. 2 (Contract No. AT(11-1)-72), Providing for Research in the Separation of Gases by Diffusion Through Permeable Membranes

Description: This report covers the work performed since February 1950. A great deal of effort was concentrated during the summer months when most of the personnel was able to work almost full-time on the project. The material is presented in two parts: 1. literature status, and 2. investigational status.
Date: October 31, 1950
Creator: Kammermayer, Mari
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Isotope Effect. III, the Reaction of Acetone-1-C14 With Alkaline Hypoiodite

Description: A small but real isotope effect was found when acetone-1-C14 was treated with alkaline hypoiodites; the iodeform contained more than half and the acetate less than half of the activity of7 the original acetone. The effect is in the opposite direction from most of the other isotope effects so far reported, the C12-C14 bond apparently being more easily broken than the C12-C12 in this case. The magnitude of the effect is of the order of 3 to 6%.
Date: April 1951
Creator: Roe, Arthur, 1912- & Albenesius, Edward L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Transient Thermal Stresses in Circular Discs

Description: When a circular disk (of radius R.) is subjected at time t=0 to an edge temperature [formula] it experiences a temperature transient and a stress transient. An appraisal of these transients is the main objective of this study.
Date: unknown
Creator: Harvey, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Time Resolution of Scintillation Counters: Supplementary Report, Contract N-7405-eng-26 Sub 308

Description: The purpose of this report is to estimate the time error inherent in scintillation counters using the presently available crystals and multipliers, in order to obtain an indication of the direction in which improvements should be made to obtain better time resolution. The first part of this discussion concerns itself with the performance of crystals and multipliers. This is followed by a brief discussion of the effects of various factors in the multiplier which contribute to time errors. The co… more
Date: May 31, 1951
Creator: Morton, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Studies on Factors Controlling Cholesterol Synthesis in the Body

Description: Measurement of the relative rates of turnover and of cholesterol synthesis in intact animals have been made by a technique described as 'flash labelling'. The origin of plasma cholesterol has been investigated by the approach of measuring plasma cholesterol synthesis in the hepatectonized dog. Studies are also in progress on the role of hormones in regulating endogenous cholesterol synthesis and its distribution between blood and tissues in the hope of obtaining a clearer picture of this homeos… more
Date: unknown
Creator: Gould, R. Gordon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Report of Progress And Expenditures Under AEC Contract AT (30-1)-905 In The Laboratory For Nuclear Science And Engineering, Massachusetts Institute Of Technology, July 1, 1950 To June 30, 1951,

Description: This report describes the researches in chemistry carried out at the Laboratory for Nuclear Science and Engineering under AEC Contract AT (30-1)-905, and consists of two parts: an account of the work done from July 1, 1950 up to the present time, together with summaries of proposed researches (Part 1), and (Part II) a statement of expenses for the current term and proposed budget for the coming fiscal year.
Date: 1951
Creator: Massachusetts Institute of Technology. Laboratory for Nuclear Science and Engineering.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiochemistry of Several of the Uranium Fission Products

Description: Among the many scientific problems arising from the discovery of the phenomenon of fission are those pertaining to the fission products. Methods of isolating several different fission product elements and the discovery and characterization of a few new fission product activities are discussed here.
Date: June 1947
Creator: Ballou, Nathan Elmer
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiosensitivity of Haploid and Diploid Habrobracon During Pupal Development

Description: Haploids and diploids of the parasitic wasp Habrobracon were exposed to x-rays during various stages of pupal development in order to test for differential radio sensitivity. The ability to emerge from the cocoon was taken as the criterion of viability. Dosage-eclosion curves show that diploids are more resistant than haploids at all stages of pupal development. During the earlier stages, diploids are about three times as radio resistant as haploids, while during the later stages the differenti… more
Date: unknown
Creator: Clark, A. M. & Mitchell, C. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lymphoid Lesions In Poliomyelitis

Description: Examination of 50 autopsied cases of human poliomyelitis showed prominent hyperplastic and inflammatory changes in the lymphoid tissues of 41 which aside from the central nervous system damage was the most frequent and severe lesions observed. Histologically germinal centers showed prominent degenerative and regenerative alterations, fluid transudation, giant cell formation, and rare inclusion bodies, all consistent with virus effects.
Date: unknown
Creator: Sommers, Sheldon C., 1916-; Wilson, Joan C. & Hartman, Frank W. (Frank Wilbur), 1890-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Metabolism of Soy Bean Leaves. IV. On The Turnover of Chlorophyll

Description: Evidence has been given and countered that the chlorophyll concentration of higher plants is variable, reaching a minimum shortly after noon. The authors have attempted to elucidate this problem, which includes the question of the rate of turnover of chlorophyll, by the use of C14. The results indicate an undoubted minor variation in the chlorophyll content of soybean and stringless bean leaves throughout a day, the metabolic turnover however is of a periodicity and magnitude more complex and p… more
Date: unknown
Creator: Aronoff, S. & Vernon, Leo P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Study of Convex Sets in Abstract Linear Spaces Where No Topology is Supposed. 1.

Description: This paper is concerned with the study of support to a convex body in the linear space where no topology is admitted, and to the isolation of several useful notions and the investigation of their properties. The method will be mainly geometrical.
Date: unknown
Creator: Berg, W. D. & Nikodym, Otton Martin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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