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  • Other Sources  (4)
  • BIOTECHNOLOGY  (2)
  • SPACE RADIATION  (2)
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  • Other Sources  (4)
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  • 1
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    Respiratory weight losses during exercise. (1972)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Evaporative water loss from the respiratory tract was determined over a wide range of exercise. The absolute humidity of the expired air was the same at all levels of exercise and equal to that measured at rest. The rate of respiratory water loss during exercise was found to be 0.019 of the oxygen uptake times (44 minus water vapor pressure). The rate of weight loss during exercise due to CO2-O2 exchange was calculated. For exercise at oxygen consumption rates exceeding 1.5 L/min in a dry environment with a water vapor pressure of 10 mm Hg, the total rate of weight loss via the respiratory tract is on the order of 2-5 g/min.
    Keywords: BIOTECHNOLOGY
    Type: Journal of Applied Physiology; 32; Apr. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Peripheral modifications to the central drive for sweating. (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Three subjects performed from 15 to 20 bouts of 10-min bicycle ergometer exercise in a 26 C ambient. The procedure imposed a consistent pattern of internal (esophageal) temperature increase in the presence of a constant mean skin temperature. Body weight loss was continuously recorded and rate of evaporative loss due to sweating was calculated during each minute of exercise. It was confirmed that both local and total sweating are functions of internal temperature at a fixed constant mean skin temperature. In the presence of a constant central drive for sweating, the sweating response could be modified at the periphery according to the area-specific characteristics and/or by local temperature.
    Keywords: BIOTECHNOLOGY
    Type: Journal of Applied Physiology; 31; Dec. 197
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    NASA TECHNICAL REPORTS
  • 3
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    The cosmic-ray He-3/He-4 ratio from 100 to 1600 MeV/amu (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The Superconducting Magnet Instrument for Light Isotopes (SMILI) flew for 19 hours on September 1, 1989, with a residual overburden of 5 g/sq cm. It measured the charge, rigidity, and velocity of 30,000 cosmic-ray helium nuclei, with velocity determined by time-of-flight and Cerenkov techniques. Using these data, the flux and isotopic composition of helium as a function of energy were determined. The observed isotopic composition is consistent with that expected from interstellar propagation models inferred from the secondaries of CNO, in contrast to earlier observations which indicated an overabundance of He-3. We discuss constraints that this result places on cosmic-ray transport and solar modulation models.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 413; 1; p. 268-280.
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    NASA TECHNICAL REPORTS
  • 4
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    Balloon observations of Galactic cosmic ray helium before and during a Forbush decrease (1993)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: The energy spectrum of Galactic cosmic ray helium was measured in two different balloon experiments launched four days apart from Canada: SMILI-I on Sept 1, 1989 and MASS on Sept 5, 1989. A slow Forbush decrease began on Sept 4, 1989 and had not reached its maximum at the time of the MASS flight. Comparison of the balloon measurements shows a fractional decrease of 0.37 to 0.15 in the Helium flux between 200 and 450 MeV/nucleon (1.2-2.0 GV). The rigidity dependence is analyzed in two models and found to be steeper than previous observations. Interplanetary particle data and ground-based Neutron Monitor results are consistent with the balloon observations. Probable sources for this Forbush decrease are discussed.
    Keywords: SPACE RADIATION
    Type: Geophysical Research Letters (ISSN 0094-8276); 20; 17; p. 1743-1746.
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    NASA TECHNICAL REPORTS
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