986 resultados para Shock Metamorphism


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At head of title: "In-house Laboratory Independent Research Program."

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Shock tubes have been used successfully by a number of investigators to study the biological effects of variations in environmental pressures (1,2,3). Recently an unusually versatile laboratory pressurization source became available with the capability of consistently reproducing a wide variety of pressure-time phenomena of durations equal to and well beyond those associated with the detonation of nuclear devices (4). Thus it became possible to supplement costly full-scale field research in blast biology carried out at the Nevada Test Site (5,6) by using an economical yet realistic laboratory tool. In one exploratory study employing pressure pulses of 5 to 10 sec duration wherein the times to max overpressure and the magnitudes of the overpressures were varied, a relatively high tolerance of biological media to pressures well over 150 psi was demonstrated (7). In contrast, the present paper will describe the relatively high biological susceptibility to long duration overpressures in which the pressure rises occurred in single and double fast-rising steps.

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Vita.

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"This work has been supported by the National Science Foundation under Grant G-1221"

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"Issuance Date: May 24, 1965"--cover ; "December 1964"--title page

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"DA-49-193-MD-2229."

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"PNE-112F(Pt. II); Nuclear Explosions and peaceful applications."