1,477 Matching Results

Search Results


Description: A manual for supervisory personnel to aid in formulating detailed instructions for operators and foremen employed in a green salt plant is given. A description of the processsteps in plant operation is contained. (C.J.G.)
Date: December 11, 1952
Creator: Innes, E.D.; Holby, G.V. & Snyder, W.
Partner: UNT Libraries Government Documents Department


Description: The over-all objectives of this project encompassed testing the suitability of standard and special laundering methods and standard equipment for field decontamination of clothing; evaluating the contaminability and decontaminability of selected fabrics, and testing of experimental clothing monitoring instruments. Garments and fabrics contaminated by controlled methods were used during the operation for testing the equipment and evaluating fabrics and formulae. 8tandard Army laundering methods and equipment, including wooden washers, were effective for decontaminating clothing in the field. A decontaminating laundry formula employing citric acid and tartaric acid followed by either an organic or inorganic chelating agent results in a higher degree of decontamination than other formulae tested. The standard Quartermaster Corps mobile field laundry formula resulted in satisfactory decontamination with the type of soil and activity encountered and the cost of supplies is approximately one-tenth as much as the special formulae. Woolen garments and fabric swatches were decontanninated by laundering as readily as cotton or synthetic fabrics. Clothing monitoring instruments under development appear suitable for monitoring clothing under field conditions to determine the degree of contamination both before and after precessing. (auth)
Date: April 1, 1952
Creator: Hughes, D.C.; Parthum, A.H. Jr.; James, H. & McWhorter, J.C. Jr.
Partner: UNT Libraries Government Documents Department


Description: Process design information concerning equipment and operation of a plant to produce UF/sub 4/ from UO/sub 3/ is presented. Included are process flow diagrams, drawings of ventilation and dust control systems, and vent gas systenas. Equipment lists and estimated utilities are also included as well as a description of the process. (J.R.D.)
Date: June 1, 1952
Creator: Holby, G.V. & James, F.
Partner: UNT Libraries Government Documents Department

Nuclear Thermodynamics of the Heaviest Elements

Description: The phenomenon of alpha particle emission, a general observable property for the nuclides above lead, makes it possible to relate these nuclides energetically. The radioactive decay energy along a radioactive series can be summed so that the total decay energy for each nuclide in the series is known with respect to its position above teh bottom of the series, that is, with respect to its terminal lead (or bismuth) isotope. This can be done for each of the four mass types and, as shown, one can obtain this information for all the collateral members as well as the members in the main line of decay. Thus it is possible, using the relation between mass and energy and the known mass of the alpha particle, to convert this radioactive decay energy ine ach case to a relative mass value based on the mass of one of the four end products, Pb{sup 208}, Pb{sup 207}, Pb{sup 206}, or Bi{sup 209}. If the absolute mass of each of these is known, it is then possible to calculate the absolute mass for all the heavy nuclides above lead for which decay energy data are known or can be estimated. The absolute mass of only one of this group of four need actually be known since the neutron binding energies related them can be measured. it is also possible to measure the absolute masses of other nuclei in each of the four series, for example, such nuclides as U{sup 238}, Th{sup 232}, U{sup 235}, or Np{sup 237} which are available in sufficient quantity for mass spectrographic measurements, and the aboslute masses of the other members of each of the series may then be calculated from these through proper use of the decay data. if the absolute masses of more than one member of the same ...
Date: March 1, 1952
Creator: Seaborg, Glenn T.
Partner: UNT Libraries Government Documents Department

The Crystal Structures of NpC and Pu2O3

Description: NpC and Pu{sub 2}O{sub 3} have been identified by x-ray diffraction. NpC is face-centered cubic, NaCl structure with a = 5.004 {+-} 0.005 A Pu{sub 2}O{sub 3} is isomorphous with the hexagonal ''A form'' for the rare earth sesquioxides with a = 3.840 {+-} 0.004 A; c = 5.957 {+-} 0.006 A and has essentially the same atomic parameters at La{sub 2}O{sub 3}. The lattice dimensions are smaller than predicted for pure Pu{sub 2}O{sub 3}, implying that the average oxidation number of plutonium is between (III) and (IV).
Date: July 14, 1952
Creator: Templeton, D.H. & Dauben, Carol H.
Partner: UNT Libraries Government Documents Department

Abstract of Paper Presented at the Symposium on Metal ChelateChemistry at Brooklyn Polytechnic Institute on April 26, 1952

Description: The essential structural element which differentiates metal chelate compounds from metal coordination compounds, or metal complexes in general, is the existence of some linkage between two or more of the donor atoms in the first coordination sphere of the metal. It is the purpose of the present discussion to examine the influences that this structural factor may have upon the physical and chemical properties of chelate compounds. Examples of well known, simple coordination compounds involving a variety of donor atoms (Oxygen, nitrogen), as well as a variety of electrostatic situations are shown in the following formula. Below each one are listed a few corresponding chelate structures.
Date: April 1, 1952
Creator: Calvin, Melvin
Partner: UNT Libraries Government Documents Department

Activation Energy for Fission

Description: The experimentally determined exponential dependence of spontaneous fission rate on Z{sup 2}/A has been used to derive an expression for the dependence of the fission activation energy on Z{sup 2}/A. This expression has been used to calculate the activation energy for slow neutron induced fission and photofission. The correlation with the experimental data on these types of fission seems to be quite good.
Date: August 29, 1952
Creator: Seaborg, Glenn T.
Partner: UNT Libraries Government Documents Department

Interpretation of High Energy p-p Scattering.

Description: High energy p-p scattering has been interpreted by several authors in terms of highly singular noncentral interactions. The triplet state calculations were carried out in the Born approximation and, together with the singlet, yielded an almost isotropic (c.m. system) differential cross section. Agreement with experiment was good at large angles but the theoretical peak in the forward direction, due mostly to singlet d scattering, was too large. It is not clear however that the Born approximation should be valid for singular potentials.
Date: September 19, 1952
Creator: Swanson, Don R.
Partner: UNT Libraries Government Documents Department

The Path of Carbon in Photosynthesis, XV. Ribulose andSedoheptulose

Description: The intermediates of carbon dioxide reduction by plants include phosphorylated derivatives of hydroxy acids and sugars. Their identification becane possible when the use of labeled carbon dioxide permitted discrimination between the earliest products and the many other components of photosynthetic tissues. A number of compounds were identified by virtue of the chemical and physical properties of the radioactive compounds in tracer amounts and by direct comparison of these properties with those of suspected known metabolic intermediates. It became apparent that several labeled compounds found in short exposures to radioactive carbon dioxide were not substances previously identified as metabolic intermediates. Two phosphate esters in particular were observed in the products of the first few seconds of steady-state photosynthesis by all the photosynthetic microorganisms and higher plants examined in this laboratory. These esters have been isolated by paper chromatography in tracer quantities and enzymatically hydrolyzed to give two sugars, ribulose and sedoheptulose. This paper contains a description of the chemical identification of these sugars and some observations and suggestions regarding the function of their esters. The general importance of these compounds in photosynthesis was surmized before their identification. The products of photosynthesis with C{sup 14}O{sub 2} by each plant included phosphate esters of the same two then unknown compounds in addition to those of the expected glucose, fructose, dihydroxyacetone and glyceric acid. As the time of steady-state photosynthesis in C{sup 14}O{sub 2} decreased, the fractions of total fixed radiocarbon in the esters of the two unidentified compounds increased.
Date: January 1, 1952
Creator: Benson, A.A.; Bassham, J.A.; Calvin, M.; Hall, A.G.; Hirsch, H.; Kawaguchi, S. et al.
Partner: UNT Libraries Government Documents Department

The Path of Carbon in Photosynthesis. XVI. Kinetic Relationshipsof the Intermediates in Steady State Photosynthesis

Description: A kinetic study of the accumulation of C{sup 14} in the intermediates of steady state photosynthesis in C{sup 14}O{sub 2} provides information regarding the sequence of reactions involved. The work described applied the radio-chromatographic technique for analysis of the labeled early products. The simultaneous carboxylation reaction resulting in malic acid as well as phosphoglycerate is demonstrated in experiments at high light intensity. A comparison of radioactivities in a number of phosphorylated sugars as a function of time reveals concurrent synthesis of fructose and sedoheptulose phosphates followed by that of ribulose phosphates and later by that of glucose phosphates. The possibility that the cleavage of C{sub 4} compounds to C{sub 2} carbon dioxide acceptors may involve C{sub 7} and C{sub 5} sugars and evidence for this mechanism is presented.
Date: June 5, 1952
Creator: Benson, A.A.; Kawaguchi, S.; Hayes, P. & Calvin, M.
Partner: UNT Libraries Government Documents Department

The Path of Carbon in Photosynthesis. XVII. Phosphorus Compoundsas Intermediates in Photosynthesis

Description: Studies of carbon dioxide fixation in green plants using the C{sup 14} isotope have shown that in very short times phosphoglyceric acid contains most of the radioactivity. The tracer is present almost entirely in the carboxyl group. The importance of organic phosphates in the subsequent metabolism of phosphoglyceric acid can be seen from the accompanying photographs.
Date: July 8, 1952
Creator: Buchanan, J.G.; Bassham, J.A.; Benson, A.A.; Bradley, D.F.; Calvin, M.; Daus, L.L. et al.
Partner: UNT Libraries Government Documents Department


Description: Pertinent calculations for the WN System adsorption units were carried out on heat transfer, heat exchangers, and adsorption beds. Static and dynamic adsorption data are presented for Kr, Xe, CO, and N/sub 2/ on charcoal. (D.L.C.)
Date: November 1, 1952
Creator: Holmes, J M
Partner: UNT Libraries Government Documents Department

Use of Electricity in the Control of Sea Lampreys: Electromechanical Weirs and Traps and Electrical Barriers

Description: From abstract: An account is given of experiments conducted in 1951 and 1952 with electro-mechanical and electrical barriers for the blocking and/or capture of sea lamprey runs in tributary streams of northern Lake Huron and northern Lake Michigan.
Date: December 1952
Creator: Applegate, Vernon C.; Smith, Bernard R. & Nielsen, Willis L.
Partner: UNT Libraries Government Documents Department

A Vapor Pressure Chart for Metals

Description: From conclusions: There is a close enough correlation for most metals to give the chart some utility in estimating vapor pressure of metals.
Date: July 10, 1952
Creator: Loftness, Robert L.
Partner: UNT Libraries Government Documents Department

Uranium in the Dirty Devil Shimarump Channel Deposit

Description: From abstract: Uranium ores occur in a river channel deposit of composite type. Uranium and its daughter elements segregate during migration and each has its own accumulator. The entire deposit stays close to radioactive equilibrium but individual mineral components have departures up to 1000 fold.
Date: June 1952
Creator: Bain, George W.
Partner: UNT Libraries Government Documents Department

Uranium Deposits in Southwestern Colorado Plateau

Description: Abstract: The southwestern part of the Colorado Plateau province was studied to test results from experimental simulation of Colorado Plateau type uranium deposits and to search out additional agents influencing uranium precipitation which might be investigated experimentally.
Date: August 1952
Creator: Bain, George W.
Partner: UNT Libraries Government Documents Department

Chemical Separation of the Uranium Isotopes

Description: Report on the chemical separation of the uranium isotopes.
Date: 1952
Creator: Hutchison, Clyde A. & Murphy, George Moseley
Partner: UNT Libraries Government Documents Department