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Phosphorus Turnover and Photosynthesis

Description: The participation of phosphorus in biological oxidation-reduction reactions of the type found in glycolysis ADP + PO{sub 4}H{sup -} + 3-phosphoglyceraldehyde + DPN{sup +} = 3-phosphoglycerate{sup -} + 2H{sup +} + DPNH + ATP has suggested theories in which similar reactions are proposed for photosynthesis. In these theories the reducing power of photosynthesis is utilized not only for reduction of carbon dioxide but also, by means of coupled oxidations, for the generation of high-energy phosphat… more
Date: November 1, 1947
Creator: Aronoff, Sam & Calvin, Melvin
Partner: UNT Libraries Government Documents Department
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Diffraction Effects in Neutron Attenuation Measurements

Description: All errors due to diffraction effects in a neutron attenuation experiment are computed. Also a special experiment to measure the forward intensity of diffracted neutrons from lead and copper is described, and the results given. These agree with the theoretical values.
Date: November 1, 1947
Creator: McMillan, E. M. & Sewell, D. C.
Partner: UNT Libraries Government Documents Department
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Fraunhofer Diffraction Pattern Produced by a Slit of Varying Width and its Application to High Speed Cameras

Description: Abstract: "A theoretical and experimental investigation is made of the diffraction pattern produced by a slit, whose aperture varies uniformly from a constant value A to zero. The results of this investigation are applied to a proposed high speed camera. It is shown that diffraction effects are very serious and cannot be neglected. It seems, unless the suggested design of this high speed camera is changed, the camera will be of little use for accurate measurements, and photographs will show too… more
Date: November 11, 1947
Creator: Geiger, F. E. & Brixner, Berlyn
Partner: UNT Libraries Government Documents Department
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Progress Report for 1947

Description: The year 1947 has witnessed the dawn of a new era of atomic science, a flowering of fundamental knowledge of the nature of matter which appears to be unsurpassed even by that period of the 1930's which led to the age of plutonium. A great new cyclotron, an atom-smasher ten times more powerful than the one which brought plutonium into the world, has carried mankind over a new horizon of sub-atomic space. It has brought scientists at last to grips with the infinitely small and rapid forces, until… more
Date: November 1, 1947
Creator: Authors, Various
Partner: UNT Libraries Government Documents Department
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Excitation Function of the Reaction C12(n,2n)C11 at High Energies

Description: The excitation curve for the reaction C{sup 12}(n,2n)C{sup 11} has been calculated for energies up to 100 Mev. The calculations were done as described in the preceding letter for the similar reaction of C{sup 12} under proton bombardment. The results of the calculations for 50% charge exchange are shown in Figure 1. The calculated cross section for the reaction at 90 Mev is: .011 barns for 100% charge exchange and .013 barns for 50% charge exchange. The experimental value is 0.025 {+-} .004 bar… more
Date: November 1, 1947
Creator: Heckrotte, Wolff & Wolff, Peter
Partner: UNT Libraries Government Documents Department
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Summary of the Reseach Progress Meeting

Description: A 1,000 Mev synchrotron is under construction. The magnet will be a ring magnet containing about 900 tons of steel. The plates are of 1.2 inch steel with a 0.1 percent carbon content. A diagram of the cross section of this magnet is given in Figure 1. The design of the vacuum chmnber presents some difficulties since the space behind the gap is not large enough to permit easy access to the windings and to the vacuum space behind the gap. The field strength at the gap is 15,000 gauss with a 1 sec… more
Date: November 1, 1947
Creator: O'Brien, Inez
Partner: UNT Libraries Government Documents Department
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Diffraction Effects in Neutron Attenuation Measurements

Description: All errors due to diffraction effects in a neutron attenuation experiment are computed. Also a special experiment to measure the forward intensity of diffracted neutrons from lead and copper is described, and the results given. These agree with the theoretical values.
Date: November 1, 1947
Creator: Sewell, D. C. & McMillan, E. M.
Partner: UNT Libraries Government Documents Department
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Summary of the Research Progress Meeting

Description: This summary discusses the following topics: (1) Neutron Scattering. By R. Hildebrand. A series of measurements have been made of the angular distribution of neutrons scattered from small spheres of various materials placed in the neutron beam of the l84-inch cyclotron. The scattered neutrons were detected by copper covered carbon detectors placed in a symmetrical arrangement about the scatterer. The carbon detectors, which wore activated by the neutrons through the C{sup 12}(n, 2n)C{sup 11} re… more
Date: November 1, 1947
Creator: Wakerling, R.K.
Partner: UNT Libraries Government Documents Department
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Proton Angular Distribution for 90 Mev Neutron-proton Scattering

Description: The angular distribution of the recoil protons in neutron-proton scattering at 90 Mev has been measured for angles between 5{sup o} and 65{sup o} from the direction of the neutron beam. The neutrons were produced by stripping 190 Mev deuterons in a 1/2 inch Be target in the 184-inch F.M. cyclotron. R. Serber has calculated the neutron energy distribution; it has a peak at 90 Mev and a half width of 27 Mev. This distributiQn has been checked experimentally for the neutrons by Wilson Powell and b… more
Date: November 3, 1947
Creator: Hadley, James; Leith, Cecil E. & York, Herbert F.
Partner: UNT Libraries Government Documents Department
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Phosphorus Turnover and Photosynthesis

Description: The participation of phosphorus in biological oxidation-reduction reactions of the type found in glycolysis ADP {ne} PO{sub 4}H{sup -} + 3-phosphoglyceraldehyde + DPN{sup +} = 3-phosphoglycerate{sup -} + 2H{sup +} + DPHN + ATP has suggested theories in which similar reactions are proposed for photosynthesis. In these theories the reducing power of photosynthesis is utilized not only for reduction of carbon dioxide but also, by means of coupled oxidations, for the generation of high-energy phosp… more
Date: November 1, 1947
Creator: Calvin, Melvin
Partner: UNT Libraries Government Documents Department
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Excitation Function of the Reaction C12(p,pn)C11 at High Energies

Description: Chupp and McMillan have recently measured the excitation curve for the reaction C{sup 12}(pnpn)C{sup 11} at high energies. Using the model of the nucleus described by Serber, the excitation curve of the above reaction has been calculated for energies up to 100 Mev. The excitation of the nucleus is determined on the basis that the incident proton makes individual collisions with the nucleons, the transferred energy exciting the nucleus. n-p collisions are taken to be three times more probable th… more
Date: November 1, 1947
Creator: Heckrotte, W. & Wolff, Peter
Partner: UNT Libraries Government Documents Department
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Quarterly Report August 1947 to November 1947, Biology Division

Description: The following document is a compilation of quarterly reports from August 1946 to November of 1947 from the Biology Division of the University of Chicago.
Date: November 1, 1947
Creator: Brues, Austin M.
Partner: UNT Libraries Government Documents Department
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A Method for the Determination of Traces of Metals: [Part] 4. Polarographic Studies.

Description: Report describing an updated method to determine traces of metals under polarographic studies, which operates at a higher cathode current density with a small area of the anode immersed in the solution where an appreciable quantity of iron was present in the solutions that were to be polarographed. The results of these studies are also presented.
Date: November 1947
Creator: Bricker, Clark E.; Furman, N. Howell & McDuffie, Bruce
Partner: UNT Libraries Government Documents Department
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Topical Report on Literature Survey of Treatments for Monazite Sands

Description: The following report covers the literature available in the Battelle library as well as the Atomic Energy Commission (New York, N.Y.) on the processing of monazite sands for thorium and rare earth contents.
Date: November 1, 1947
Creator: Willigman, M. & Slowter, E. E.
Partner: UNT Libraries Government Documents Department
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Progress Report for the Month of November, 1947

Description: This is a progress report on the work of ore tressing and pyrometallurgical studies as well as a study of chemical work on phosphates. This report covers the month of November, 1947.
Date: November 30, 1947
Creator: Center, E. J.; Pray, H. A.; Richardson, A. C. & Sullivan, John D.
Partner: UNT Libraries Government Documents Department
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The Spot Welding of Alclad 24S-T in Thicknesses of 0.064, 0.081, and 0.102 Inch

Description: Note presenting an investigation to determine the spot-welding characteristics of heavy gages of Alclad 24S-T aluminum alloy. The weldability of the alloy in thicknesses of 0.064, 0.081, and 0.102 inch was investigated in order to determine the capacity of the machine.
Date: November 1947
Creator: Hess, W. F.; Wyant, R. A. & Winsor, F. J.
Partner: UNT Libraries Government Documents Department
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A comparison of three theoretical methods of calculating span load distribution on swept wings

Description: Report presenting the application of three methods for calculating span load distribution for five swept wings. The methods were examined to establish their relative accuracy and ease of application. While the Weissinger and Falkner methods were more useful for certain circumstances, there were no advantages noted with the Mutterperl method.
Date: November 1947
Creator: Van Dorn, Nicholas H. & DeYoung, John
Partner: UNT Libraries Government Documents Department
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Stress-Strain and Elongation Graphs for Alclad Aluminum-Alloy 75S-T Sheet

Description: Note presenting results of tests on duplicate longitudinal and transverse specimens of Alclad aluminum-alloy 75S-T sheets with three nominal thicknesses. The stress-strain, stress-deviation, tangent-modulus, and reduced-modulus graphs are plotted on a dimensionless basis to make them applicable to material with yield strengths which differ from those of the test specimens.
Date: November 1947
Creator: Miller, James A.
Partner: UNT Libraries Government Documents Department
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The Effect of Preheating and Postheating on the Quality of Spot Welds in Aluminum Alloys

Description: Note presenting an investigation to determine the effect of preheating and postheating cycles on the quality and strength of spot welds in aluminum alloys. The results showed that the combination of a slowly rising condenser-discharge preheat current with a rapidly rising welding current afforded no more freedom from expulsion than was obtained with the rapidly rising welding current alone.
Date: November 1947
Creator: Hess, W. F.; Wyant, R. A. & Winsor, F. J.
Partner: UNT Libraries Government Documents Department
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