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476 Matching Results
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The Knock-Limited Performance of S Reference Fuel Plus 2 Milliliters of Triethylthallium Per Gallon
Report discusses the results of testing of thallium as an antiknock agent in an internal-combustion engine. From Introduction: "On a weight basis, the thallium vapors were found to have several times the antiknock value of tetraethyl lead, which was added to the fuel. The amount of thallium vapor necessary to raise the antiknock properties of a gasoline up to exact equivalence with a benzol-gasoline mixture was determined in these engine tests."
Date:
November 1945
Creator:
Meyer, Carl L.
System:
The UNT Digital Library
Ditching Tests With 1/10-Size Model of the Army a-20a Airplane 1: Calm-Water Tests in NACA Tank No.2
Report presenting tests to determine the behavior of landplanes when they are forced to land on the water. The report is incomplete.
Date:
November 1943
Creator:
Dawson, John R. & Jarvis, George A.
System:
The UNT Digital Library
On the Flow of a Compressible Fluid by the Hodography Method 2: Fundamental Set of Particular Flow Solutions of the Chaplygin Differential Equation
Report presenting the utilization of the differential equation of Chaplygin's jet problem to give a systematic development of particular solutions of the hodograph flow equations, which extends the treatment of Chaplygin into the supersonic range and completes the set of particular solutions. The solutions serve to place on a reasonable basis the use of velocity correction formulas for the comparison of incompressible and compressible flows.
Date:
November 1944
Creator:
Kaplan, Carl
System:
The UNT Digital Library
The effect of exhaust-stack shape on the design and performance of the individual cylinder exhaust-gas jet-propulsion system
Report presenting tests on a single-cylinder, air-cooled engine to determine the effect of several different exhaust-stack shapes on the design and performance of the individual cylinder exhaust-gas jet-propulsion systems. Results regarding the effect of nozzle area and stack shape on exhaust-gas jet thrust, effect of nozzle area and stack shape on overall performance for the S-shape, the 90 degree bend, and the 180 degree bend, the effect on the shape on engine power and volumetric efficiency, and the effect of a branched stack on engine power are provided.
Date:
November 1942
Creator:
Turner, L. Richard & Humble, Leroy V.
System:
The UNT Digital Library
The problem of longitudinal stability and control at high speeds
Report discussing the difficulty in pulling of high-speed dives, which is primarily due to the effect of compressibility on the lift of the wing. Some of the means described for providing increased longitudinal control include auxiliary flaps and a controllable stabilizer.
Date:
November 1943
Creator:
Hood, Manley J. & Allen, H. Julian
System:
The UNT Digital Library
The Flow of a Compressible Fluid Past a Curved Surface
Report presenting an iteration method employed to obtain the flow of a compressible fluid past a curved surface. For small Mach numbers and thin shapes, the results obtained by the iteration process agree with those obtained by the Poggi method.
Date:
November 1943
Creator:
Kaplan, Carl
System:
The UNT Digital Library
History of Water Flooding of Oil Sands in Oklahoma
Report issued by the U.S. Bureau of Mines on the oil production from water injection methods. As noted in the introduction, "it is the purpose of this report to present data such as volume of oil produced monthly, volume of water injected monthly, spacing of wells, number of injection wells and oil wells, and other such pertinent information" (p. 5). This report includes tables, graphs, maps, and illustrations.
Date:
November 1943
Creator:
Taliaferro, David Benjamin & Logan, David M.
System:
The UNT Digital Library
Effects of Desulfurization on the Lead Susceptibility of Distillates From Some Crude Oils From Texas, New Mexico and Oklahoma
Report issued by the U.S. Bureau of Mines on experiments conducted regarding the desulfurization of distillates from crude oil. Characteristics and desulfurization processes are presented. This report includes tables, and a chart.
Date:
November 1943
Creator:
Guthrie, Boyd & Simmons, M. C.
System:
The UNT Digital Library
Coke from Low-Ash Appalachian Coals for Carbon Electrodes in Aluminum Industry with a Chapter on Comparison of Results Obtained by Trent Process for Cleaning Coal with Those by Float-and-Sink Methods
Report issued by the U.S. Bureau of Mines on testing conducted on coking coal samples for carbon electrode use in aluminum production. The testing methods, and results are presented. This report includes tables.
Date:
November 1943
Creator:
Selvig, W. A.; Ode, W. H.; Gibson, F. H. & Davis, Joseph D.
System:
The UNT Digital Library
Petroleum-Engineering Study of the Lake Creek Field, Montgomery County, Texas
Report issued by the Bureau of Mines over petroleum-engineering studies conducted at the Lake Creek field. As stated in the introduction, "this report is an engineering analysis of the reservoirs in the Lake Creek field and includes estimates of the initial volume of gas and the recoverable hydrocarbon liquid and oil" (p. 5). This report includes tables, maps, illustrations, and photographs.
Date:
November 1948
Creator:
Hill, Harry Blackburn & Vogel, Felix A., Jr.
System:
The UNT Digital Library
Investigation of the Young American Lead-Zinc Deposit, Stevens County, Washington
Report issued by the Bureau of Mines over investigations of mines in Stevens County, Washington. The history, geology, and physical features of the mines are presented. This report includes tables, maps, and illustrations.
Date:
November 1949
Creator:
Hundhausen, Robert J.
System:
The UNT Digital Library
Investigation of the McCormick Chromite Mine, Tuolumne County, California
Report issued by the Bureau of Mines over investigations on the McCormick chromite mine. Descriptions of the chromite deposits are presented. Details about the development made in the mine are listed. This report includes tables, maps, and illustrations.
Date:
November 1949
Creator:
Shattuck, John R. & Ricker, Spangler
System:
The UNT Digital Library
Diamond Drilling at the Boston Consolidated Copper Mine, Salt Lake County, Utah
Report issued by the Bureau of Mines over diamond-drilling projects in Salt Lake County. The geology, physical features, and history of the mines are presented. This report includes tables, maps, illustrations, and photographs.
Date:
November 1949
Creator:
Jones, Robert L. & Wilson, Stephen R.
System:
The UNT Digital Library
Air and Gas Injection in the Oil Fields of Illinois
Report issued by the U.S. Bureau of Mines on the gas injection methods in the oil fields of Illinois. The results and properties of the injections are presented. This report includes tables, graphs, illustrations, and maps.
Date:
November 1944
Creator:
Keithly, C. M. & Jennings, Thomas
System:
The UNT Digital Library
Annual Report of the Mining Division, Fiscal Year 1941
Report issued by the U.S. Bureau of Mines on the annual study of the work done by the Mining Division. Investigations, operations, and projects completed during the fiscal year are discussed. This report includes tables, and photographs.
Date:
November 1941
Creator:
Jackson, Charles F.
System:
The UNT Digital Library
Report of the Nonmetals Division: Fiscal Year 1942
Report issued by the Bureau of Mines over the operations of the Nonmetals Division during 1942. The work done by the division is discussed. This report includes tables, illustrations, and photographs.
Date:
November 1942
Creator:
Ralston, Oliver C. & Stern, A. George
System:
The UNT Digital Library
Phosphorus Turnover and Photosynthesis
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 phosphate bonds, or in the last reference directly for the generation of high-energy phosphate. Since in these theories acyl phosphate is formed from inorganic phosphate, they are amenable to proof without isolation of particular intermediates, by means of radioactive phosphorus. It would be expected that the rate of conversion of inorganic phosphate to organic phosphate would be greater in light than in the dark. They have investigated this possibility under a variety of conditions and are unable to substantiate the theories.
Date:
November 1, 1947
Creator:
Aronoff, Sam & Calvin, Melvin
System:
The UNT Digital Library
Paramagnetic Suseptibilities and Electronic Structure of AqueousCations of Elements 92 to 95
Magnetic susceptibilities per gram atomic weight of elements 92 to 95 in most of their oxidation states were measured on 0.1 ml of solution which was 0.007 to 0.09 M in heavy element. The values obtained (all paramagnetic) in c.g.s. units x 10{sup 6} were: U(IV), 3690; Np(VI), 2060; Np(V), 4120; Np(IV), 4000; Pu(IV), 1610; Pu(III), 370; Am(III), 720. The results could be interpreted only on the basis of electronic configurations 5f{sup n}, even though susceptibilities were generally lower than the theoretical values and lower than experimental values for corresponding lanthanide cations. The lower values should be expected as a result of the Stark effect produced by fields of anions and of water dipoles. Failure of the Russell-Saunders approximation to the coupling between electrons may account for some of the error in the theoretical calculations. Wider multiplet splitting in the actinides accounts for the fact that the susceptibilities of Pu(III) and Am(III) are many-fold lower than those of Sm(III) and Eu (III) respectively.
Date:
November 12, 1948
Creator:
Howland, Jerome J. & Calvin, Melvin
System:
The UNT Digital Library
N-17, A Delayed Neutron Emitter
The decay scheme of a 4.2 second neutron emitter has been investigated in detail. Chemical and physical evidence shows that it is N{sup 17}, which emits beta rays to a broad excited state of O{sup 17}, which then breaks up into a neutron plus O{sup 16}. The energy spectrum of the neutrons is determined by measuring the energies of the O{sup 16} recoils in a proportional counter. The neutrons have a most probable energy of 0.9 Mev, a 'half width' of less than .5 Mev, and an upper limit of about 2 Mev. {beta}-recoil coincidences are observed, as predicted by the Bohr-Wheeler theory, and the {beta}-ray energy is measured by absorption. The beta rays in coincidence with neutrons have an upper limit of 3.7 {+-} 0.2 Mev. Beta-rays directly to the ground stat of O{sup 17} are not observed because of high background effects, but should have an energy of 8.7 Mev. Some evidence is presented to show that energy is conserved in the {beta}-n transition through the broad excited state in O{sup 17}.
Date:
November 5, 1948
Creator:
Alvarez, L. W.
System:
The UNT Digital Library
Diffraction Effects in Neutron Attenuation Measurements
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.
System:
The UNT Digital Library
Corrosion Rates of Mild and Stainless Steels Exposed in Redox Stream IAW : (ANL, June 1, 1948 Flowsheet)
Introduction: In order to determine the relative corrosion resistance of welded mild and stainless steels in Redox Stream IAW neutralized to pH 0, 2, and 10 a test program, described below, has been carried out.
Date:
November 1, 1949
Creator:
Koenig, W. W.
System:
The UNT Digital Library
Corrosion Investigations of Redox Pilot Plant Equipment at Oak Ridge National Laboratories
The following report is based on the observations made during a visit to the Oak Ride National Laboratories of their Redox Pilot Plant equipment.
Date:
November 3, 1949
Creator:
Koenig, W. W.
System:
The UNT Digital Library
Polarographic Determination of Hexone
The following report describes polarographic methods that determine saturated aliphatic carbonyl compounds.
Date:
November 10, 1949
Creator:
Alkire, George J.
System:
The UNT Digital Library
Effect of Temperature on Beta-Ray Measurements
Summary: "This report investigates photographic methods of measuring beta radiation and includes a study of temperature effects on these measurements. Experimental data are submitted to show that an increase in film temperature before and during beta irradiation causes a definite increase in density for the same dosage. Recommendations drawn from experience gained in the experimental works are offered."
Date:
November 23, 1949
Creator:
Stevens, A. J.
System:
The UNT Digital Library