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  • Weitere Quellen  (25)
  • AEROSPACE MEDICINE  (11)
  • AERODYNAMICS  (10)
  • INSTRUMENTATION AND PHOTOGRAPHY  (4)
  • Chemistry
  • 1995-1999
  • 1985-1989  (6)
  • 1975-1979  (12)
  • 1970-1974  (7)
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  • 1995-1999
  • 1985-1989  (6)
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  • 11
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    Depth of immersion as a determinant of the natriuresis of water immersion (1974)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The current study was undertaken to further assess the contribution of an immersion-induced hydrostatic pressure gradient on the redistribution of blood volume. The rate of sodium excretion by seated subjects was significantly increased by water immersion up to the chest and neck compared to waist immersion and controls. These results are consistent with the hypothesis that whereas immersion to the level of the diaphragm merely cancels the intravascular hydrostatic pressure gradient by providing an identical external gradient, immersion above the diaphragm level results in increased water pressure which tends to favor a shift in blood volume from the lower extremities.
    Schlagwort(e): AEROSPACE MEDICINE
    Materialart: Society for Experimental Biology and Medicine; vol. 146
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 12
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    A graphite crystal polarimeter for stellar X-ray astronomy. (1972)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: The first crystal X-ray polarimeter to be used for X-ray astronomy is described. Polarization is measured by modulation of the X rays diffracted at an average 45 deg glancing angle from large, curved graphite crystal panels as these rotate about an axis parallel to the incident X-ray flux. Arrangement of the crystal panels, the design of the detector, and the signal-processing circuitry were optimized to minimize systematic effects produced by off-axis pointing of the rocket and cosmic ray induced events. The in-flight performance of the instrument in relation to the observed background signal is discussed.
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Materialart: Review of Scientific Instruments; 43; July 197
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 13
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    Comparison of water immersion and saline infusion as a means of inducing volume expansion in man (1975)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: The study compares the natriuresis induced by head-out water immersion to that of a standard saline infusion and assesses the relative effectiveness of these two techniques as volume determinants of renal sodium and water handling in humans in a seated posture. The data obtained show that the volume stimulus of immersion is identical to that of standard saline-induced extracellular fluid volume expansion (ECVE) in normal seated subjects. The ability of head-out water immersion to induce a natriuresis without a concomitant increase in total blood volume and with a decrease in body weight suggests that water immersion may be preferred as an investigative tool for assessing the effects of ECVE in man.
    Schlagwort(e): AEROSPACE MEDICINE
    Materialart: Journal of Applied Physiology; 39; July 197
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 14
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    Suppression of ADH during water immersion in normal man (1975)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: A study was undertaken to ascertain whether diuresis induced by immersion is medicated by an inhibition of ADH. Immersion resulted in a progressive decrease in ADH excretion from 80.1 + or - 7 (SEM) to 37.3 + or - 6.3 microU/min (P less than 0.025). Cessation of immersion was associated with a marked increase in ADH from 37.3 + or - 6.3 microU/min to 176.6 + or - 72.6 microU/min during the recovery hour (P less than 0.05). Concomitant with these changes, urine osmolality decreased significantly beginning as early as the initial hour of immersion from 1044 + or - 36 to 542 + or - 66 mosmol/kg H2O during the final hour of immersion (P less than 0.001). These findings are consistent with the earlier suggestion that suppression of ADH release contributes to enhanced free water clearance in hydrated subjects undergoing immersion.
    Schlagwort(e): AEROSPACE MEDICINE
    Materialart: Journal of Applied Physiology; 38; June 197
    Format: text
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  • 15
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    Alterations in acid-base homeostasis during water immersion in normal man (1974)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: The effects of water immersion on renal bicarbonate and acid excretion were assessed in 10 normal male subjects. Immersion resulted in a highly significant progressive increase in the rate of sodium and bicarbonate excretion, and in urine pH. Immersion was also associated with a significant increase in urine P-CO2; this increase presupposes a maintained rate of hydrogen secretion in the distal tubular segment. The rapidity of onset of the bicarbonaturia (2 hrs of immersion) and the concomitant increase in urinary P-CO2 suggest that enhanced bicarbonate excretion of immersion cannot be completely accounted for by immersion-induced suppression of aldosterone, and that the natriuresis and bicarbonaturia of immersion is mediated in part by an increased proximal rejection of sodium and bicarbonate.
    Schlagwort(e): AEROSPACE MEDICINE
    Materialart: Journal of Laboratory and Clinical Medicine; 84; Dec. 197
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 16
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    Suppression of plasma renin and plasma aldosterone during water immersion in normal man (1975)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Schlagwort(e): AEROSPACE MEDICINE
    Materialart: Journal of Clinical Endocrinology and Metabolism; 41; Sept
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 17
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    Quantitative density visualization in a transonic compressor rotor (1977)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: The flow in a 59-cm-diameter high-work transonic compressor rotor has been visualized using a fluorescent gas, 2,3, butanedione, as a tracer. The technique allows the three-dimensional flow to be imaged as a set of distinct planes. Quantitative static density maps were obtained by correcting the images for distortion and nonlinearities introduced by the illumination and imaging systems. These images and maps were used to analyze the three-dimensional nature of the blade's boundary layer and shock system.
    Schlagwort(e): AERODYNAMICS
    Format: text
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  • 18
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    A comparison of the computed and experimental three dimensional flow in a transonic compressor rotor (1976)
    In:  Other Sources
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    Publikationsdatum: 2019-07-13
    Beschreibung: The three dimensional inviscid flow in a transonic compressor rotor; total pressure ratio of 1.65, has been numerically computed using MacCormack's time-marching method. This solution is compared to intra-blade static density measurements obtained by gas fluorescence. These results and comparisons illustrate the importance of three dimensional flow phenomena in determining the rotor flow field and show that while the viscous phenomena have an important influence, particularly on the outflow, the inviscid computation properly models the flow in the inlet portion of the rotor passages.
    Schlagwort(e): AERODYNAMICS
    Materialart: AIAA PAPER 76-368 , Fluid and Plasma Dynamics Conference; Jul 14, 1976 - Jul 16, 1976; San Diego, CA
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 19
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    Quantitative density visualization in a transonic rotor (1975)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: The flow in a two foot diameter transonic rotor has been visualized using a fluorescent gas, 2, 3 butanedione, as a tracer. The technique allows the three dimensional flow to be imaged as a set of distinct planes. Quantitative static density maps can be obtained after correcting the images for distortion and nonlinearities introduced by the illumination and imaging systems. The visualized flow is compared to data taken simultaneously by high frequency pressure transducers near the rotor entrance and exit planes.
    Schlagwort(e): AERODYNAMICS
    Materialart: AIAA PAPER 75-24 , American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting; Jan 20, 1975 - Jan 22, 1975; Pasadena, CA
    Format: text
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  • 20
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    Shock structure in transonic compressor rotors (1979)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: The inadequacy of axisymmetric theory in modeling the structure of the shock system in a transonic compressor rotor is shown with a simple model. A more accurate model for the flow near the sonic radius is proposed, which is supported by some flow visualization data and three-dimensional computations.
    Schlagwort(e): AERODYNAMICS
    Materialart: AIAA Journal; 17; Apr. 197
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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