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The Lindemann and Grüneisen Laws

Description: The Lindemann assumption of direct contact of neighboring atoms at fusion is replaced by the criterion that melting occurs when the root-mean-square amplitude of thermal vibration reaches a critical fraction ρ, presumed the same for all isotropic monatomic solids, of the distance of separation of nearest-neighbor atoms. The Debye-Waller theory of the temperature dependence of the intensity of Bragg reflection of x-rays is used, without further assumptions, to derive a generalized Lindemann law… more
Date: March 23, 1955
Creator: Gilvarry, J. J. (John James), |1917-
Partner: UNT Libraries Government Documents Department
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Fundamentals of Glass-to-Metal Bonding. [Part] 5-A. Temperature and Pressure Dependence of the Wettability of Metals by Glass. [Part] 5-B. Reactions of Tantalum and sodium Silicate Glass. Technical Report No. 5

Description: Part A. The major effort during the past year has been the construction of a suitable vacuum furnace for studying the effects of temperature and pressure on the wettability of metals by glass. A systems was completed that was capable of subjecting test combinations up to temperatures of 1400 degree C at a working pressure of 1 x 10(-5) mm. of Hg. Part B. A compound, identified by X-ray analysis as sodium meta tantalate (na2Ta2O6), was found at the interface between a sodium silicate glass and t… more
Date: June 24, 1955
Creator: Fulrath, Richard M.; Mitoff, Stephan P. & Pask, Joseph A. (Joseph Adam), 1913-2003.
Partner: UNT Libraries Government Documents Department
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Studies of Thorium X Applied to Human Skin. IV. Clinical and Autoradiographic Findings Following the Introduction by Iontophoresis

Description: 1) The technical details of controlled experiments with iontophoresis of thorium X solutions are described. 2) Experiments carried out on living human skin in situ demonstrate that Iontophoresis of weak solutions of thorium X will increase its biologic effects as judged by erythema and pigmentation, and cause greater penetration as shown by autoradiography. 3) The possible relationship between increased penetration of thorium X and increased clinical biologic effects is discussed. 4) Some possi… more
Date: June 1955
Creator: Fleischmajer, Raul & Witten, Victor H.
Partner: UNT Libraries Government Documents Department
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High Altitude Cosmic Ray Neutron Intensity Variations

Description: Three groups of balloon flights carrying unshielded boron trifluoride counters were made from geomagnetic latitudes 10.1°N, 55.1°N, and 88.6°N. From the data obtained, curves of slow-neutron intensity versus atmospheric depth for depths less than 700 millibars are plotted. The mean absorption lengths for neutrons in the equilibrium portion of the atmosphere were found to be [formula]. The depths of the neutron intensity maxima were found to be [formula]. From these results and those of other in… more
Date: July 1, 1955
Creator: Soberman, Robert K.
Partner: UNT Libraries Government Documents Department
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Gas Plated Coatings on Metals and Alloys : Progress Report No. 6 and Final Report

Description: The object of the work performed under this contract was to investigate the possibility of gas plating copper base metal with (a) pure chromium metal from chromium hexacarbonyl vapor; (b) chromium-nickel plating from a mixture of chromium hexacarbonyl and nickel tetracarbonyl. The object of the work performed during the final month was to confirm the fact that the gas plating of chromium metal and chromium-nickel laminates free from nitrides, oxides and carbides was practical.
Date: June 5, 1953
Creator: Nack, Herman; Bulloff, Jack J. & Whitacre, John R.
Partner: UNT Libraries Government Documents Department
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Gas Plated Coatings on Metals and Alloys : Progress Report No. 5

Description: The object of the work done during the month of June has been to assure that deposition of chemically pure chromium metal by gas plating, both by itself, or as a component of nickel-chronium and/or other alloys.
Date: July 6, 1953
Creator: Nack, Herman; Bulloff, Jack J. & Whitacre, John R.
Partner: UNT Libraries Government Documents Department
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Gas Plated Coatings on Metals and Alloys : Progress Report No. 1

Description: The object of this project is to conduct studies on the coating of metals and alloys by the gas plating process. Coatings to be studied consist of chromium on copper; alloys of nickel chromium on copper; molybdenum on stainless steel and Inconel; chromium on stainless steel and Inconel; and tungsten and molybdenum and their carbides on stainless steel and Inconel.
Date: March 11, 1953
Creator: Nack, Herman & Whitacre, John R.
Partner: UNT Libraries Government Documents Department
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Equipment and Preliminary Results for the Leaching of UO2 in a Basic Carbonate Circuit

Description: Equipment has been designed and constructed for the purpose of leaching pure uranium minerals in both acidic and basic circuits. This equipment provides a means for removal of a series of samples during any one run, control over speed of agitation, indication of gas over pressure, and automatic temperature control. These units may be operated up to 1500 p.s.i. Solid UO2 samples were prepared by sintering under hydrogen to 1800 degree C. Preliminary results of the leaching of sintered UO2 in a b… more
Date: May 1955
Creator: Pearson, Ray L.; Mackay, Theron L.; Wadsworth, Milton E. & Fassell, W. Martin, Jr.
Partner: UNT Libraries Government Documents Department
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Automatic Thermogravimetric Analysis in Ceramics

Description: Ceramic investigators often find it desirable to know the weight of reactants either immediately after a given heating period or while the specimen is still at the elevated reacting temperature. The conventional gravimetric methods render either of these goals difficult if not actually impossible. Specimens often gain weight through adsorption of water or other reactions upon cooling to room temperature. Desiccators are employed but are not completely satisfactory. Repeated heating and weighing… more
Date: 1955
Creator: Hyatt, Edmond P. (Edmond Preston), 1923-; Cutler, Ivan B., 1924-; Fassell, W. Martin, Jr. & Wadsworth, Milton E.
Partner: UNT Libraries Government Documents Department
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Relation Between Bacteremia and Death in Mice following X-Ray and Thermal Column Exposures

Description: The role of endogenous infections was investigated as a contributory cause of death in mice irradiated with doses of 400 to 800 r x radiation and 480 to 616 rem of thermal column radiation. Results indicate a direct relationship between mortality and bacteremia following exposure to both types of radiation.
Date: 1955
Creator: Boone, Irene U.; Woodward, Kent T. & Harris, Payne S.
Partner: UNT Libraries Government Documents Department
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Pulsed Photomultipliers for Fast Scintillation Counting

Description: A pulsed 931-A photomultiplier and TW-10 traveling wave oscilloscope have been used to measure the scintillation decay times of (a) transtilbene, (b) terphenyl-in-toluene, and (c) polystyrene plastic containing one percent terphenyl, 0.03% α-NPO, and 0.01% zinc stearate. The times for 1/e decay are (a) 4±1×10-9 sec, (b) 2.2±0.3×10-9 sec, and (c) 2.2±0.3×10-9 sec. The behavior of the multiplier with large collector currents was studied, using a synchronized flash lamp. Linear currents up to 1.5 … more
Date: 1955
Creator: Singer, Sidney; Neher, Leland K. & Ruehle, Robert A.
Partner: UNT Libraries Government Documents Department
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The Decomposition of Solid Barium Nitrate by Gamma Rays

Description: There was considerable disagreement between results obtained by early investigators who studied the interaction of ionizing radiations with solid nitrates. It was thought worthwhile, therefore, to extend their work and to make certain that reproducible results were being obtained. It was expected that the nitrite ion and oxygen would be found in equivalent amounts in the irradiated samples. Four measurements of nitrite ion and oxygen indicate that the decomposition of barium nitrate by gamma r… more
Date: 1955
Creator: LeMar, Lawrence E.
Partner: UNT Libraries Government Documents Department
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Grüneisen's Law and the Fusion Curve at High Pressure

Description: A method to determine the correction to Grüneisen's law corresponding to the effect of the electrons at high pressure. It is assumed that the lattice contribution to the pressure is small and that the equation of state of the solid can be approximated by results of the statistical Thomas-Fermi atom model for the electron pressure.
Date: April 11, 1955
Creator: Gilvarry, J. J. (John James), 1917-
Partner: UNT Libraries Government Documents Department
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Equation of State of Water

Description: A generalization of the Fermi-Thomas model for application of mixtures. This study attempts to determine the equation of state of water up to pressure of 10,000 megabars and temperatures of several thousand electron-volts.
Date: May 23, 1955
Creator: Latter, Albert L. & Latter, Richard
Partner: UNT Libraries Government Documents Department
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Detection of Airborne Beryllium Dust : Monthly Report Covering the Period from May1 to June 1, 1955

Description: During this period a prototype gamma ray detection system was assembled and data was obtained on samples of beryllium salts on filter paper under a variety of conditions. Ordinarily either a scaler-register combination or the CRM-recorder combination would be sufficient for obtaining data. Both units have been used here in order to utilize the particular advantages of each system. The scaler-register unit was employed for obtaining precise data over short intervals while the CRM-recorder was us… more
Date: June 14, 1955
Creator: McCarty, R. G.
Partner: UNT Libraries Government Documents Department
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Line Broadening by Electrons : the Validity of Simple Theories

Description: A comparison of the simple impact theories of line broadening by electrons with the detailed computations of Kivel, Bloom, and Margenau.
Date: May 9, 1955
Creator: Meyerott, Roland Edward & Margenau, Henry, 1901-1997.
Partner: UNT Libraries Government Documents Department
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Laboratory Scale Abrasive Tests on Ion Exchange Resins

Description: A laboratory scale test was devised to determine the relative physical stability of ion exchange resins designed for use in the resin-in-pulp process. The test was applied to four samples of resins.
Date: July 28, 1954
Creator: Ladner, Hugh A. & Lower, George W.
Partner: UNT Libraries Government Documents Department
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The Development of Fixed Screen Resin-In-Pulp Devices

Description: A resin-in-pulp process was developed using a series of fixed-screen or Winchester cells. Various laboratory and pilot plant models were constructed and tested under simulated plant conditions. The fixed-screen device proved very effective in the recovery of uranium and/or vanadium by a continuous, resin-in-pulp process.
Date: August 5, 1954
Creator: Charles, W. D.; Thorpe, D. F.; Lower, G. W.; Kaufman, David; Schiff, Norman N.; Abrams, Charles S. et al.
Partner: UNT Libraries Government Documents Department
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Pilot Plant Tests on Anaconda Ore From the Grants District, Grants, New Mexico

Description: A series of pilot plant runs were made on the Jackpile ore, Jackpile mixed blend, Jackpile-Poison Valley blend, and Jackpile-Arrowhead blend.
Date: July 22, 1954
Creator: Hollis, R. F.; Abrams, Charles S.; McArthur, C. K.; Izzo, T. F. & Wilson, H.
Partner: UNT Libraries Government Documents Department
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Utex Ore Stockpiled at Monticello

Description: A program of bench scale leaching and ion exchange testing for the recovery of uranium from liquors produced by leaching Utex ore (Monticello Stockpile 28) was conducted at Monticello, Utah from July 1953 to April 1954.
Date: July 19, 1954
Creator: Moulton, Harry D.
Partner: UNT Libraries Government Documents Department
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Vanadium Salt Roasting Studies

Description: The test work showed that three variables were important in obtaining good vanadium extractions. These variables were 1) the concentration of salt, 2) the roasting time, and 3) the temperature. In general, eight percent salt, 850'C, and 45 minutes roasting time are the optimum conditions for vanadium extraction by salt roasting methods.
Date: unknown
Creator: Stanley, Alan
Partner: UNT Libraries Government Documents Department
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The Chemistry of Vanadium: A Summary of the Non-Project Literature Through November, 1952

Description: The non-project literature concerning the chemistry of vanadium has been summarized through November, 1952. The report is presented in terms of izo- and heteropoly vanadates and cationic forms of pentavalent vanadium, complexes of di-, tri-, and pentavalent vanadium, and oxidation potentials of various vanadium systems. A bibliography of 93 references is included.
Date: June 25, 1954
Creator: Frank, Andrew J.
Partner: UNT Libraries Government Documents Department
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Ion Exchange of Grants Acid Leach Liquors

Description: This report summarizes the test work done to evaluate the column ion exchange process for extraction or uranium from Grants acid leach liquors.
Date: July 30, 1954
Creator: Thorpe, D. F.; Schiff, Norman N.; Pickwick, F. J.; Cole, J. W. & Lynch, J. T.
Partner: UNT Libraries Government Documents Department
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