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Polarographic Determination of Uranium in Dust Samples

Description: Abstract: "Samples of dust are collected from the atmosphere with a Mine Safety Appliance Co. electrostatic precipitator and analyzed for uranium by means of a dropping mercury electrode apparatus. Two to three micrograms of uranium can be detected in a cell solution volume of 1 ml. Iron, nickel and chromium present in shop dusts do not interfere. Copper may interfere if present in excess but may be removed by a sulfide precipitation. Directions for preparation of cell solution and operation of the Polarograph are given. The polarographic method described may be used for determination of uranium in samples other than atmospheric dusts."
Date: August 30, 1943
Creator: Smith, Stanton B.
Partner: UNT Libraries Government Documents Department
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Distribution Coefficient of D₂O Between Triethylamine and Water

Description: Summary: "Water containing 1.8% D2O was distributed between the two liquid phases formed with triethylamine at 20 and 35 C. The triethylamine was removed from each phase by aseotropic distillation with benzene before analyzing the water by determining its density with a quartz float. The ratios of the concentrations of the D2O in the water layer to that in the amino layer were 1.007 and 1.004 at 20 and 35, respectfully. The differences from unity are about the same as the errors of analysis."
Date: August 31, 1943
Creator: Carlson, H. C.
Partner: UNT Libraries Government Documents Department
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Vacuum Probe, Standard Leaks, and Needle Valve for Use with the Helium Leak Detector

Description: The following report is split into four parts describing the usage of a vacuum probe for leak hunting with the Helium Leak Detector, the two types of Standard Leaks that were designed to measure the sensitivity of the detector, the development of a needle valve adjusted for controlling the flow of a standard mixture of helium and air into the leak detector for a sensitivity check by the single leak method, and a worm and gear adjustment developed to facilitate throttling of the Helium Leak Detector on a vacuum header equipped with the 3/8" Kerotect angle valve.
Date: August 1945
Creator: Samuel, A. J.
Partner: UNT Libraries Government Documents Department
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A Direct Current Emission Regulator

Description: The following report describes a current beam modulation designed to replace the standard regulator and to achieve an ion beam free from amplitude modulation.
Date: August 4, 1945
Creator: White, J. R. & Cameron, A. E.
Partner: UNT Libraries Government Documents Department
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The Effect of Geometry and Voltage Variations on the Operations of the Phillips Ion Gage

Description: Abstract: "The study of ten P.I.G. geometries with copper electrodes and d.c. voltage indicates that from a pressure of 0.1 to about 3.0 microns, depending upon the gage, there is a consistent change in the air pressure-current characteristics of a P.I.G. as the geometry and voltage are changed. At higher pressures discontinuities appear in the gage current and prohibit its use as a pressure gage. In all useful geometries, the greater the applied voltage above 1000 volts, the shorter the useful portion of the pressure-current curve became. Below 1000 volts the curve tended to be unstable. With other conditions constant, the pressure limit increased as the cathode separation decreased and as the anode diameter increased. The empirical equation for the current in certain Philips Ion Gages at certain pressures and voltages is I = a'Pe-p/b where I is the current, P the pressure, e the Naperian base and a' and b constants and dependent upon geometry and voltage."
Date: August 22, 1945
Creator: McKinney, C. R.; Eggen, Donald T.; Bishop, A.; Arnold, W. A. & Starr, C.
Partner: UNT Libraries Government Documents Department
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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
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Obliquity Factors for Shields

Description: The following preliminary report describes obliquity factors for shields of various shapes.
Date: August 15, 1947
Creator: Brooks, Harvey
Partner: UNT Libraries Government Documents Department
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Impregnation of Beryllium Oxide with Uranium

Description: The purpose of this report is to present a method of impregnating beryllium oxide with uranium and to describe the properties of beryllium oxide and of commercial beryllium oxide ceramics.
Date: August 20, 1947
Creator: Sanz, M. C. & Randolph, R.
Partner: UNT Libraries Government Documents Department
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Critical Dimensions of Untamped Conical Vessels

Description: Abstract: "The need often arises for determining the critical chemical concentration of uranium solution in the conical bottom of a plant reactor or storage vessel, or the dimension if the concentration is known. This report describes the mathematical analysis of Poisson's equation for a spherical sector, which approximates a right circular cone. The ratio of the critical dimension of an equivalent sphere to the height of the sector for various sector angles is derived from a comparison of first eigenvalues. No description of further relations between composition and dimensions is discussed in the report."
Date: August 25, 1947
Creator: Murray, Raymond
Partner: UNT Libraries Government Documents Department
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Further Critical Experiments on a Small Reactor of Enriched U-235 with Al-H₂O Moderator and Beryllium Reflector

Description: From introduction: "The purpose of the present report is to describe briefly certain improvements that have been made in the experimental facilities and to present the results of further measurements on critical masses and spatial neutron flax distributions in Be reflected reactors having square and thin slab geometries."
Date: August 17, 1948
Creator: Martin, A. B. & Mann, M. M.
Partner: UNT Libraries Government Documents Department
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Iodine Exchange Reaction

Description: This report discusses an analysis on the exchange reaction between iodine and unipositive iodine with pyridine.
Date: August 25, 1948
Creator: Kleinberg, Jacob & Sattizahn, James
Partner: UNT Libraries Government Documents Department
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Magnesium Oxychloride Cements and Concretes for Pile Shielding

Description: From introduction: "The present report covers the results of an extended investigation of magnesium oxychloride cements and concretes. In this study the effects of the composition of the cement or concrete on its physical and mechanical properties were determined. In addition, the stability of the mixes was observed."
Date: August 1949
Creator: Snyder, M. J. & Pavlish, A. E.
Partner: UNT Libraries Government Documents Department
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The Heat of Solution of Neptunium Metal and the Heats of Formation of some Neptunium Chlorides ; A Microcalorimeter for Heat of Solution Measurements

Description: Due to a need of precise thermodynamical and thermochemical data on these elements and their compounds for the understanding and correlation of the chemical behavior of these substances, this report measures the heat of the solution of neptunium metal and the heats of formation of the neptunium chlorides using a microcalorimeter to measure the heat.
Date: August 1950
Creator: Westrum, Edgar F., Jr. & Eyring, LeRoy
Partner: UNT Libraries Government Documents Department
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Hydrofluorination of Zirconium Oxide

Description: This report analyzes experiments on the production of zirconium tetrafluoride and discusses the reactivity data taken after various methods.
Date: August 2, 1950
Creator: Phillips, Don
Partner: UNT Libraries Government Documents Department
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The Decay of Induced Activity in Portland, Barytes, and Brookhaven Cements

Description: The following report describes results from a study of three types of cement (Barytes, Brookhaven, and Portland) exposed in the ORNL Reactor for periods of seven and twenty-eight days.
Date: August 23, 1950
Creator: Bowman, W. H.; James, D. L. & Roarty, J. D.
Partner: UNT Libraries Government Documents Department
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Geological Investigation of Mexican Cry Mesa, Lukachukai District, Arizona with Diamond Drilling Recommendations

Description: Abstract: The Salt Wash member of the Jurassic Morrison formation of Mexican Cry Mesa, Lukachukai District, Arizona, was examined to determine size, grade, and distribution of contained carnotite deposits and the possibilities of developing reserves by exploratory drilling. Only three occurrences of carnotite-bearing sandstone were found in 17 miles of rim outcrop. Limited drilling is recommended in the vicinity of these exposures.
Date: August 2, 1951
Creator: Ellsworth, Philip C.
Partner: UNT Libraries Government Documents Department
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The Argonne Heavy Water Reactor (CP-3 Prime)

Description: The following document provides figures with all information that describe the heavy water moderated chain reacting pile at Argonne National Laboratory.
Date: August 10, 1951
Creator: Zinn, Walter H.
Partner: UNT Libraries Government Documents Department
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Numerical Technique for Criticality Calculations on Hydrogen Moderated Reactors

Description: "The purpose of this memo is to set down a derivation and numerical technique for a method that can be used for criticality calculations on bare reactors containing hydrogen together with another moderator such as BeO. The method and notation are that of G. Goertzel (NDA)-1, and D. Selengut (NEPA). In the interest of the computers, the numerical technique, associated notation, and calculation form are modeled after that currently used by the ANP Physics Group for BeO moderated reactors."
Date: August 20, 1951
Creator: Webster, J. W.
Partner: UNT Libraries Government Documents Department
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