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  • BIOTECHNOLOGY  (53)
  • ASTROPHYSICS
  • 1970-1974  (53)
  • 1973  (53)
  • 1
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    Body water compartments during bed rest: Evaluation of analytical methods (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Nine healthy young men were studied to determine the reproducibility and interchangeability of the use of radio-iodinated human serum albumin and Evans Blue dye for estimating plasma volume, sodium bromide for extracellular fluid volume, and deuterium oxide for total body water volume. All subjects were tested in a semibasal condition and allowed to rest for at least 30 min. after arriving at the laboratory. The results indicate that there was uniform distribution of I131 and Evans Blue dye 10 min. after injection and of NaBr and D2O 3 hours after oral ingestion; the buildup of residual tracer did not interfere appreciably with the measurement of either or Evans Blue spaces when they are administered at equal intervals, and the buildup of background tracer after ingestion of NaBr and D2O once per week for three consecutive weeks did not affect the accuracy of the measurement. It was found that I131 and Evans Blue may be used interchangeably for estimating plasma volume; for estimating bromide and D2O spaces, one 3-hour equilibrium blood sample gives results similar to the extrapolation of multiple samples.
    Keywords: BIOTECHNOLOGY
    Type: NASA-TR-R-406 , A-4656
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Application of NASA-developed technology to the automatic control of municipal sewage treatment plants (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A search was made of NASA developed technology and commercial technology for process control sensors and instrumentation which would be applicable to the operation of municipal sewage treatment plants. Several notable items were found from which process control concepts were formulated that incorporated these items into systems to automatically operate municipal sewage treatment plants. A preliminary design of the most promising concept was developed into a process control scheme for an activated sludge treatment plant. This design included process control mechanisms for maintaining constant food to sludge mass (F/M) ratio, and for such unit processes as primary sedimentation, sludge wastage, and underflow control from the final clarifier.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-132340
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    An environmental chamber system for prolonged metabolic studies on small animals (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Measurement of metabolic adaptation to marginally stressful environments requires both precise regulation of a variety of atmospheric factors for extended periods of time and the capacity to employ sensitive parameters in an undisturbed subject. This paper describes a metabolic chamber system which can simultaneously maintain groups of small animals in two completely separate closed environments having different pressures, temperatures and gas compositions for an indefinite period. Oxygen consumption, carbon dioxide production, food and water consumption and animal activity cycles can be continuously monitored and quantified 24 h per day while the animals are in an unrestrained state. Each chamber can be serviced and the animals handled, injected and sacrificed without subjecting them to barometric stress. Several unique electrical and mechanical components allow semi-automated data collection on a continuous basis for indefinite periods of time.
    Keywords: BIOTECHNOLOGY
    Type: Space Life Sciences; 4; Sept
    Format: text
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  • 4
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    An integrated human thermal system and its unsteady-state simulation (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Consideration of an integrated human thermal system consisting of a human thermal system proper and an external thermal device. A mathematical model of the integrated system has been used in a computer simulation, and the simulation results have been verified through comparison with the results of experiments carried out on nine human subjects. The comparison indicates that the model simulates the system reasonably well.
    Keywords: BIOTECHNOLOGY
    Type: International Journal of Biomedical Engineering; 1; 1, 19; 1973
    Format: text
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  • 5
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    Atmosphere control (1973)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Atmospheric control studies emphasized the carbon dioxide problem. Trace contaminants are removed by solid adsorbents and by catalytic oxidation. Humidity control and storage systems for atmospheric constituents are briefly summarized.
    Keywords: BIOTECHNOLOGY
    Type: BioTechnol., Inc. Bioastronaut. Data Book, 2d Ed.; p 807-845
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Human control capabilities (1973)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The capabilities and limitations of man as an element in a closed loop control system under normal environmental conditions are described. Controller characteristics are enumerated, using manual control, quasilinear models, pilot opinion and ratings, compensatory tracking, optimum control models, motion cues, multiple input tracking, multiple loop tracking, transmission delays, and adaptive manual control. Various controls, manipulators, and displays are also considered.
    Keywords: BIOTECHNOLOGY
    Type: BioTechnol., Inc. Bioastronaut. Data Book, 2d Ed.; p 751-806
    Format: text
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  • 7
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    Crew report (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: A 56-day chamber simulation of Skylab was successfully completed. The atmosphere (5 psi, 70 percent oxygen, 30 percent nitrogen, 5 mm carbon dioxide) and medical features including a 21-day pre- and 18-day post-test medical protocols were closely simulated. No apparent crew health problems were induced by the atmosphere, semiclosed environment, or other test features; and no appreciable crew degradation appeared over this period. The chamber and associated systems performed without major problems.
    Keywords: BIOTECHNOLOGY
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 46 p
    Format: text
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  • 8
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    Habitability/crew quarters, experiment M487 (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Skylab experiment M487, habitability crew quarters, is designed to provide an operational evaluation of the Skylab habitat by gathering data regarding the manner in which crewmen carry out their daily living and working routines during the missions. The success of the Skylab habitability experiment depends, in large measure, on the adequacy of the data collection instruments and the manner in which they are used.
    Keywords: BIOTECHNOLOGY
    Type: Skylab Med. Expt. Altitude Test (SMEAT); 11 p
    Format: text
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  • 9
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    Implantable telemetry systems for use in animal monitoring (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: BIOTECHNOLOGY
    Format: text
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  • 10
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    Landing performance by low-time private pilots after the sudden loss of binocular vision - Cyclops II (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Study of low-time general aviation pilots, who, in a series of spot landings, were suddenly deprived of binocular vision by patching either eye on the downwind leg of a standard, closed traffic pattern. Data collected during these landings were compared with control data from landings flown with normal vision during the same flight. The sequence of patching and the mix of control and monocular landings were randomized to minimize the effect of learning. No decrease in performance was observed during landings with vision restricted to one eye, in fact, performance improved. This observation is reported at a high level of confidence (p less than 0.001). These findings confirm the previous work of Lewis and Krier and have important implications with regard to aeromedical certification standards.
    Keywords: BIOTECHNOLOGY
    Type: Aerospace Medicine; 44; Nov. 197
    Format: text
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