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  • Other Sources  (9,447)
  • 1975-1979  (9,447)
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  • 1
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    Mineral and nitrogen metabolic studies, experiment M071 (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The similarity between bed rest test and space flight effects on human mineral and nitrogen metabolisms indicates impairment of capable musculoskeletal functions. A pattern of urinary calcium increases and total calcium shifts suggests that calcium losses continue with time. Significant losses of nitrogen and phosphorus are associated with reduction in muscle tissue. It is concluded that capable musculoskeletal function is likely to be impaired during space flights of 1 1/2 to 3 years duration.
    Keywords: AEROSPACE MEDICINE
    Type: Biomed. Results from Skylab; p 164-174
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Apollo food technology (1975)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Large improvements and advances in space food systems achieved during the Apollo food program are discussed. Modifications of the Apollo food system were directed primarily toward improving delivery of adequate nutrition to the astronaut. Individual food items and flight menus were modified as nutritional countermeasures to the effects of weightlessness. Unique food items were developed, including some that provided nutritional completeness, high acceptability, and ready-to-eat, shelf-stable convenience. Specialized food packages were also developed. The Apollo program experience clearly showed that future space food systems will require well-directed efforts to achieve the optimum potential of food systems in support of the physiological and psychological well-being of astronauts and crews.
    Keywords: AEROSPACE MEDICINE
    Type: Biomedical Results of Apollo; p 437-468
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    NASA TECHNICAL REPORTS
  • 3
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    Effect of potassium depletion in normal males - An Apollo 15 simulation (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: In the course of Apollo 15, physiologic abnormalities, manifested by ectopic activity on the ECG and unusual alterations in exercise tolerance, occurred in the crew of the Lunar Excursion Module. These were associated with decreases in total body potassium, measured by K-42, of 10% and 15%. The possibility of inadequate potassium (K+) intake existed. A simulation study was performed prior to Apollo 16, corresponding in duration to Apollo 15. Subjects endured the same sleep aberrations and caloric expenditure as the Apollo 15 astronauts. Subjects consumed a diet containing only 15 mEq/d of K+ during the entire 12 days of absolute bedrest. Study implications and reasons for discrepancies between K+ loss measured by balance techniques and K-42 are reviewed.
    Keywords: AEROSPACE MEDICINE
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  • 4
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    Mineral and nitrogen balance study observations - The second manned Skylab mission (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A metabolic study of important body elements, particularly those of the musculoskeletal system, was carried out on the astronauts of the Skylab 3 mission during the preflight, inflight, and postflight phases. An elevation in the level of urinary calcium similar to that observed in the 28-d Skylab flight continued throughout the flight. Significant nitrogen and phosphorus losses, apparently associated with muscle tissue loss, occurred in spite of inflight exercise programs. On the basis of these results it is predicted that capable musculoskeletal function is likely to occur in flights longer than about 9 months in duration.
    Keywords: AEROSPACE MEDICINE
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  • 5
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    Airport laser-Doppler (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Laser system remotely senses and tracks aircraft-wake turbulence. Other potential applications include long-range (remote) detection of airflow, monitoring smokestack exit flow velocities, and observing winds at altitude.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-23423 , NASA Tech Briefs (ISSN 0145-319X); 1; 2; P. 183
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  • 6
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    Solar X-ray spectroscopy with a Bent Crystal Spectrometer /BCS/ (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A high-resolution Bent Crystal Spectrometer (BCS) which provides simultaneous and continuous time coverage of a range of wavelengths is described; its application to spectral studies of solar X-ray emission is discussed. Design of the BCS and its accompanying position-sensitive detector is considered. Calibrations of the crystal curvature, the angle between a crystal reference plane and the collimator axis, and the position response of the position-sensitive proportional counter in determining absolute wavelengths are also mentioned. An active solar region spectrum obtained during an airborne BCS test is compared to wavelength data derived from theory or previous experiments, and excellent agreement is found. Specifications for a BCS system to be used in the Solar Maximum Mission satellite of 1979 are given.
    Keywords: ASTRONOMY
    Type: Plenary Meeting; Jun 07, 1977 - Jun 18, 1977; Tel Aviv; Israel
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  • 7
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    A field-ionization neutral detector - FIND (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The field ionization neutral detector FIND operates according to the following principle: Neutral atoms are attracted toward the field ionization tips since they are polarized by the electric field of the tips. The atoms are singly ionized and repelled by the positive potential of the tips toward the detector situated behind a grid at ground potential. The ions deposit in the detector their kinetic energies, typically 26 keV, corresponding to the potential difference between the ionization region and the detector. Laboratory results show that FIND can have the resolution, sensitivities and durability required to perform in situ measurements of neutral H and He fluxes in interplanetary space, cometary halos and exospheres.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: International Cosmic Ray Conference; Aug 15, 1975 - Aug 29, 1975; Munich
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  • 8
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    The debubbling of moving source signatures (1978)
    In:  Geophysics, Köln, Elsevier, vol. 43, no. 4, pp. 715-729, pp. 1015, (ISSN: 1340-4202)
    Details
    Publication Date: 1978
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    BIBLIOGRAPHY SEISMOLOGY
  • 9
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    SAS-2 galactic gamma-ray results. 2: Localized sources (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: Gamma ray emission was detected from the radio pulsars PSR 1818-04 and PSR 1747-46, in addition to the previously reported gamma ray emission from the Crab and Vela pulsars. Because the Crab pulsar is the only one observed in the optical and X-ray bands, these gamma ray observations suggest a uniquely gamma ray phenomenon occurring in a fraction of the radio pulsars. PSR 1818-04 has a gamma ray luminosity comparable to that of the Crab pulsar, whereas the luminosities of PSR 1747-46 and the Vela pulsar are approximately an order of magnitude lower. SAS-2 data for pulsar correlations yielded upper limits to gamma ray luminosity for 71 other radio pulsars. For five of the closest pulsars, upper limits for gamma ray luminosity are found to be at least three orders of magnitude lower than that of the Crab pulsar. Gamma ray enhancement near the Milky Way satellite galaxy and the galactic plane in the Cygnus region is also discussed.
    Keywords: SPACE RADIATION
    Type: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 15-26
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  • 10
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    SAS-2 galactic gamma-ray results. 1: Diffuse emission (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: Continuing analysis of the data from the SAS-2 high energy gamma ray experiment has produced an improved picture of the sky at photon energies above 35 MeV. On a large scale, the diffuse emission from the galactic plane is the dominant feature observed by SAS-2. This galactic plane emission is most intense between galactic longitudes 310 deg and 45 deg, corresponding to a region within 7 kpc of the galactic center. Within the high-intensity region, SAS-2 observes peaks around galactic longitudes 315, 330, 345, 0, and 35 deg. These peaks appear to be correlated with galactic features and components such as molecular hydrogen, atomic hydrogen, magnetic fields, cosmic-ray concentrations, and photon fields.
    Keywords: SPACE RADIATION
    Type: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 3-14
    Format: text
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