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  • Other Sources  (384)
  • BIOSCIENCES  (378)
  • LUNAR AND PLANETARY EXPLORATION
  • 1970-1974  (384)
  • 1972  (384)
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  • Other Sources  (384)
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  • 1970-1974  (384)
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  • 1
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    Biomedical experiments. Part A: Biostack experiment (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The biostack experiment is described which was designed to study the biologic effects of individual heavy nuclei of galactic cosmic radiation during space flight outside the magnetosphere of the earth. Specifically, the biostack experiment was designed to promote research on the effects of high energy/high Z particles of galactic cosmic radiation on a broad spectrum of biologic systems, from the molecular to the highly organized and developed forms of life. The experiment was considered unique and scientifically meritorious because of its potential yield of information - currently unavailable on earth - on the interaction of biologic systems with the heavy particles of galactic cosmic radiation.
    Keywords: BIOSCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 10 p
    Format: text
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  • 2
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    Surveyor 3: Bacterium isolated from lunar retrieved television camera (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Microbial analysis was the first of several studies of the retrieved camera and was performed immediately after the camera was opened. The emphasis of the analysis was placed upon isolating microorganisms that could be potentially pathogenic for man. Every step in the retrieval of the Surveyor 3 television camera was analyzed for possible contamination sources, including camera contact by the astronauts, ingassing in the lunar and command module during the mission or at splashdown, and handling during quarantine, disassembly, and analysis at the Lunar Receiving Laboratory
    Keywords: BIOSCIENCES
    Type: Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 239-248
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  • 3
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    Microbial response to space environment, part B (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The performance of the microbial response to space environment experiment is considered excellent by all investigators. For most microbial systems, only preliminary survival data are available at this time. None of the available data indicate space flight-mediated changes in cell viability or recovery. One quite important observation has been made at this early date, however. The eggs produced after mice had been infected with N. dubius larvae demonstrated a significant decrease in hatchability when compared to identical ground controls. Except for the fact that the Apollo 16 flight larvae had been on board the command module, treatment of the flown larvae and ground control larvae was the same; neither had been exposed to UV irradiation. The significance and implications of this finding are currently being studied.
    Keywords: BIOSCIENCES
    Type: Apollo 16 Prelim. Sci. Rept.; 6 p
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  • 4
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    Visual light flash phenomenon, part C (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Apollo 16 mission provided the opportunity to obtain additional data on the characteristics and frequency of the light flashes and also provided the first opportunity to obtain a direct physical record of incident cosmic ray particles with the Apollo light flash moving emulsion detector (ALFMED). The ALFMED is an electromechanical device that is worn on the head like a helmet and supports cosmic radiation-sensitive emulsions around the head of the test subject. Two light flash observation sessions were conducted during the mission: one during translunar coast and the second during transearth coast. Characteristics of the light flashes observed and reported by the Apollo crew members were generally similar to those reported on previous missions. Analyses of the ALFMED emulsion plates are proceeding as scheduled, although results are not yet available. The ALFMED results should provide conclusive evidence establishing the correlation, if any, between the incident cosmic ray particles and the perception of light flashes as reported by Apollo crew members.
    Keywords: BIOSCIENCES
    Type: Apollo 16 Prelim. Sci. Rept.; 4 p
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  • 5
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    Microbiological sampling of returned Surveyor 3 electrical cabling (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A piece of electrical wiring bundle running from the television camera to another part of the spacecraft was selected for microbiological examination. Sampling methods are discussed. The results presented show that no viable microorganisms were recovered from the part of the Surveyor 3 cable which was tested. Factors that could have contributed to the sterility of the cable are thermal vacuum testing, natural dieoff, change in pressure during launch, and lunar vacuum and temperature.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 248-251
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  • 6
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    Helicopter crew/passenger vibration sensitivity - (1972)
    In:  CASI
    Details
    Publication Date: 2006-04-26
    Description: Helicopter crew and passenger vibration sensitivity are presented. Pilot subjective ratings are established for discrete frequencies and the impact of combinations of harmonic frequencies is examined. A passenger long term comfort level and a short term limit are defined for discrete frequencies and compared with pilot ratings. The results show reasonable agreement between pilot and passenger. Subjective comfort levels obtained for mixed frequency environments clearly demonstrate the need for a multi-frequency criterion.
    Keywords: BIOSCIENCES
    Type: NASA. Langley Res. Center Symp. on Vehicle Ride Quality; p 143-153
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  • 7
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    Cardiac beta-adrenergic receptors and coronary hemodynamics in the conscious dog during hypoxic hypoxia. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The mechanisms by which acute hypoxia (10% and 5% oxygen) mediates changes in coronary blood flow and cardiac function were investigated in the conscious dog. When the dogs breathed hypoxic gas mixtures through a tracheostomy, both arterial and coronary sinus oxygen tensions were significantly decreased. With 5% oxygen, there were significant increases in heart rate (25%), maximum left ventricular dP/dt (39%), left circumflex coronary artery blood flow (163%), and left ventricular oxygen consumption (52%), which were attenuated by beta-adrenergic blockage with propranolol. When electrical pacing was used to keep the ventricular rate constant during hypoxia, there was no significant difference in coronary blood flow before and after beta blockade. Beta-adrenergic receptor activity in the myocardium participates in the integrated response to hypoxia although it may not cause active vasodilation of the coronary vessels.
    Keywords: BIOSCIENCES
    Type: Aerospace Medicine; 43; Apr. 197
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  • 8
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    Effects of pentobarbital on plasma glucose and free fatty acids in the rat. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Hyperglycemia and hypolipemia were observed in rats after the injection of sodium pentobarbital. The observed changes were independent of whether the blood was collected by decapitation or by needle puncture of the aorta. The hyperglycemic response was caused by two factors including the stress of the injection per se and the pharmacological action of the drug. Hyperlipemia was observed at 5 min postinjection. However, pentobarbital decreased plasma free fatty acids by 15 min postinjection. Both the hyperglycemia and hypolipemia responses were dose dependent.
    Keywords: BIOSCIENCES
    Type: Society for Experimental Biology and Medicine; vol. 139
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  • 9
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    Effect of stratified inequality of blood flow on gas exchange in liquid-filled lungs. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: This investigation set out to answer two questions: (1) are the distal alveoli in the terminal lung units less well perfused than the proximal alveoli, i.e., is there stratification of blood flow; and (2) if so, does this enhance gas exchange in the presence of stratified inequality of ventilation. Excised dog lungs were ventilated with saline and perfused with blood. Following single inspirations of xenon 133 in saline and various periods of breath holding, the expired xenon concentration against volume was measured and it confirmed marked stratified inequality of ventilation under these conditions. By measuring the rate of depletion of xenon from alveoli during a period of blood flow, we showed that the alveoli which emptied at the end of expiration had 16% less blood flow than those exhaling earlier. However, by measuring the xenon concentration in pulmonary venous blood, we found that about 10% less tracer was transferred from the alveoli into the blood when the inspired xenon was stratified within the respiratory zone. Thus while stratification of blood flow was confirmed, it was shown to impair rather than enhance the efficiency of gas transfer.
    Keywords: BIOSCIENCES
    Type: Journal of Applied Physiology; 32; Mar. 197
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  • 10
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    Viruslike particles in the tissues of normal and gamma-irradiated Drosophila melanogaster. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A new finding of viruslike particles in the salivary and accessory glands, muscles, and nerves of normal and gamma-irradiated Drosophila melanogaster is discussed. In morphology and size, the particles seemed identical to those described in earlier reports. On the basis of the available results, it cannot be affirmed that these particles infect only dividing cells, since they are found in all the Drosophila tissues so far examined. Their relation to the aging process is felt to be an interesting subject for further study.
    Keywords: BIOSCIENCES
    Type: Journal of Invertebrate Pathology; 19; Jan. 197
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