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  Partner: UNT Libraries Government Documents Department
 Decade: 1950-1959
Abnormal grain growth in S-816 alloy

Abnormal grain growth in S-816 alloy

Date: April 1952
Creator: Rush, A I; Freeman, J W & White, A E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
ABSOLUTE THERMAL NEUTRON DETERMINATION. PART II. ABSOLUTE BETA COUNTING OF INDIUM FOILS

ABSOLUTE THERMAL NEUTRON DETERMINATION. PART II. ABSOLUTE BETA COUNTING OF INDIUM FOILS

Date: October 1, 1955
Creator: Koontz, R.L.; Greenfield, M.A. & Jarrett, A.A.
Description: Correction factors for the effect of thickness on the selfscattering, self-absorption, and backscattering of beta particles from indium foils were determined for irradiated foils of 0.03 to 100 mg/cm/sup 2/. The data were corrected for the activity produced by epithermal neutrons, self-shielding of thermal neutrons by the foil during irradiation, the backscatter from the foil support, and the contributions of gamma and x rays to the counting rate. The multiple beta spectra of indium produced a minimum in the self-absorption and self-scattering correction curve in the GM detector at approximately 1 mg/cm/ sup 2/ and a maximum at approximately 12 mg/cm/sup 2/. The selfabsorption curve for indium in the 2 pi counter has the expected shape for a beta emitter with multiple spectra. The self-scattering and self-absorption correction factors for a 100 mg/cm/sup 2/ indium foil are approximately 1.5 for a GM detector at 7% geometry and approximately 3 for a 2 pi counter. (D.L.C.)
Contributing Partner: UNT Libraries Government Documents Department
The absorption, distribution, and excretion of tritium in men and animals

The absorption, distribution, and excretion of tritium in men and animals

Date: November 24, 1950
Creator: Pinson, E.A. & Anderson, E.C.
Description: A series of experiments on exposure of man and rats to tritium gas (HT) or tritiated water (HTO) are reported. In one human experiment 3 millicuries of HTO was administered in 200 milliliters of water by ingestion. Absorption into the blood stream was linear with time and complete in about 45 minutes. Body water turnover was measured over a period of six days by weighing all food and fluid intake and all excretory output. For four days water turnover was kept near normal (2.7 liters per day). During the last two days water turnover was increased to 12.8 liters per day. Tritium excretion rates was determined on eight other human subjects in which water turnover in which measured less precisely. The biological half-life of HTO in nine human subjects varied from 9 to 14 days on ad libitum and was reduced to 2 1/2 days in one subject on high water intake. The tritium activity in sweat, expired water vapor, septum and urine was found to be essentially the same as that in water from the blood. Rats were continually exposed to various concentrations of tritium in inspired air (0.000001 to 0.03 microcuries per ml) for periods up to 145 ...
Contributing Partner: UNT Libraries Government Documents Department
Absorption Spectra of Aromatic Disulfides

Absorption Spectra of Aromatic Disulfides

Date: October 31, 1956
Creator: Fava, Antonio & Calvin, Melvin
Description: The effect of solvents and temperature on the optical absorption spectrum of a number of substituted aromatic disulfides is reported. The problems offered by the disulfide link and the exchange reactions between disulfides, and between disulfides and thiols, are receiving increasing attention. Recently the base-catalyzed exchange between various alkyl disulfides and the corresponding thiols was studied by means of a radioactive-tracer technique. Our initial purpose was to extend these investigations to a large number of compounds in a variety of experimental conditions using a spectrophotometric technique that, if applicable, would have been incomparably faster.
Contributing Partner: UNT Libraries Government Documents Department
The Absorption Spectra of Suspensions of LivingMicro-Organisms

The Absorption Spectra of Suspensions of LivingMicro-Organisms

Date: June 1, 1954
Creator: Shibata, K.; Benson, A.A. & Calvin, M.
Description: No abstract prepared.
Contributing Partner: UNT Libraries Government Documents Department
Abstract of Paper Presented at the Symposium on Metal ChelateChemistry at Brooklyn Polytechnic Institute on April 26, 1952

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

Date: April 1, 1952
Creator: Calvin, Melvin
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.
Contributing Partner: UNT Libraries Government Documents Department
Acceleration characteristics of a turbojet engine with variable-position inlet guide vanes

Acceleration characteristics of a turbojet engine with variable-position inlet guide vanes

Date: July 7, 1955
Creator: Dobson, W F & Wallner, Lewis E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics : effect of compressor interstage air bleed

Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics : effect of compressor interstage air bleed

Date: July 3, 1953
Creator: Rebeske, John J , Jr & Dugan, James F , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics I : effect of air bleed at compressor outlet

Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics I : effect of air bleed at compressor outlet

Date: March 10, 1953
Creator: Rebeske, John J , Jr & Rohlik, Harold E
Description: An analytical investigation was made to determine from component performance characteristics the effect of air bleed at the compressor outlet on the acceleration characteristics of a typical high-pressure-ratio single-spool turbojet engine. Consideration of several operating lines on the compressor performance map with two turbine-inlet temperatures showed that for a minimum acceleration time the turbine-inlet temperature should be the maximum allowable, and the operating line on the compressor map should be as close to the surge region as possible throughout the speed range. Operation along such a line would require a continuously varying bleed area. A relatively simple two-step area bleed gives only a small increase in acceleration time over a corresponding variable-area bleed. For the modes of operation considered, over 84 percent of the total acceleration time was required to accelerate through the low-speed range ; therefore, better low-speed compressor performance (higher pressure ratios and efficiencies) would give a significant reduction in acceleration time.
Contributing Partner: UNT Libraries Government Documents Department
Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics III : effect of turbine stator adjustment

Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics III : effect of turbine stator adjustment

Date: August 2, 1954
Creator: Rohlik, Harold E & Rebeske, John J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An acceleration schedule control for accelerating a turbojet engine and its use with a speed control

An acceleration schedule control for accelerating a turbojet engine and its use with a speed control

Date: May 12, 1958
Creator: Gerus, Theodore F; Powers, Albert G & Heppler, Herbert J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An acceleration schedule control for accelerating a turbojet engine and its use with a speed control

An acceleration schedule control for accelerating a turbojet engine and its use with a speed control

Date: May 12, 1958
Creator: Gerus, T. F.; Heppler, H. J. & Powers, A. G.
Description: Accelerating-limiting controls for turbojet engines.
Contributing Partner: UNT Libraries Government Documents Department
Accelerations and passenger harness loads measured in full-scale light-airplane crashes

Accelerations and passenger harness loads measured in full-scale light-airplane crashes

Date: August 1953
Creator: Eiband, A Martin; Simpkinson, Scott H & Black, Dugald O
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accelerations in fighter-airplane crashes

Accelerations in fighter-airplane crashes

Date: November 4, 1957
Creator: Acker, Loren W; Black, Duglad O & Moser, Jacob C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accelerations in transport-airplane crashes

Accelerations in transport-airplane crashes

Date: February 1958
Creator: Preston, G Merritt & Pesman, Gerard J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Accepted Limit Values of Air Pollutants

Accepted Limit Values of Air Pollutants

Date: May 1954
Creator: Barkley, J. F.
Description: Report issued by the U.S. Bureau of Mines discussing, as stated in the introduction, the "accepted maximum permissible concentrations of air pollutants from the standpoints of health, damage to vegetation, damage to property, and requirements of industrial processes" (p. 1). This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Accidental Radiation Excursion at the Y-12 Plant, June 16, 1958: Final Report

Accidental Radiation Excursion at the Y-12 Plant, June 16, 1958: Final Report

Date: September 12, 1958
Creator: Patton, F. S.; Bailey, J. C.; Callihan, A. D.; Googin, J. M.; Jasny, G. R.; McAlduff, H. J. et al.
Description: This report describes the circumstances leading to the accident, attempts to reconstruct the nuclear reactivity conditions, and reviews the dosimetric means and results which were used to help determine the exposure of affected employees.
Contributing Partner: UNT Libraries Government Documents Department
Accidents from explosives at metal and nonmetallic mines

Accidents from explosives at metal and nonmetallic mines

Date: 1957
Creator: Cash, Frank E.
Description: Circular produced by the U.S. Bureau of Mines to promote safety through a series of reports on accident prevention in mines. According the the scope statement, "This is the fourth section of the revised series of circulars that cover various phases of accident prevention in metal and nonmetallic mines; it give information on accidents and injuries from storing, handling, and using explosive in metal and nonmetallic mines and discusses the precautions by which they can be prevented" (p. 2).
Contributing Partner: UNT Libraries Government Documents Department
Accuracy of approximate methods for predicting pressures on pointed nonlifting bodies of revolution in supersonic flow

Accuracy of approximate methods for predicting pressures on pointed nonlifting bodies of revolution in supersonic flow

Date: August 1952
Creator: Ehret, Dorris M.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The accuracy of the substitute-stringer approach for determining the bending frequencies of multistringer box beams

The accuracy of the substitute-stringer approach for determining the bending frequencies of multistringer box beams

Date: April 1956
Creator: Davenport, William W
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An accurate and rapid method for the design of supersonic nozzles

An accurate and rapid method for the design of supersonic nozzles

Date: February 1955
Creator: Beckwith, Ivan E & Moore, John A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Achievement of continuous wall curvature in design of two-dimensional symmetrical supersonic nozzles

Achievement of continuous wall curvature in design of two-dimensional symmetrical supersonic nozzles

Date: January 1952
Creator: Evvard, J C & Marcus, Lawrence R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Acid-Mine-Drainage Problems: Anthracite Region of Pennsylvania

Acid-Mine-Drainage Problems: Anthracite Region of Pennsylvania

Date: 1951
Creator: Ash, S. H. (Simon Harry), b. 1889; Felegy, E. W.; Kennedy, D. O. & Miller, P. S.
Description: Report from the U.S. Bureau of Mines discussing the anthracite region of Pennsylvania and the efforts to prevent coal-mine drainage into nearby streams. According to the introduction, "The purpose of this report is not to develop a practicable or feasible method or process of treating acid mine water but rather to present available factual and deduced data that may be useful in showing pH range over which the treatment is to take place and the sludge products most likely to be handled" (p. 2).
Contributing Partner: UNT Libraries Government Documents Department
Acoustic analysis of ram-jet buzz

Acoustic analysis of ram-jet buzz

Date: November 1955
Creator: Mirels, Harold
Description: None
Contributing Partner: UNT Libraries Government Documents Department