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  • Other Sources  (2)
  • INSTRUMENTATION AND PHOTOGRAPHY  (2)
  • microbial biomass
  • 1970-1974  (2)
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  • Other Sources  (2)
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  • 1
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    Unknown
    Practical utility of the blue spectral region (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Some aspects of multispectral photography in the blue region are discussed briefly, and sample images are submitted to demonstrate the potential utility of the blue multispectral record for oceanography.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Manned Spacecraft Center 4th Ann. Earth Resources Program Rev., Vol. 4; 29 p
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    A unique method of leak-rate measurements. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Description of an acceptable method for precision helium leak-rate measurement, for rather large pressurized vessels. Precise leakage rates of gaseous helium were measured by adapting a nominal helium leak detector in such a way that the gas load of the vacuum system plus the test vessel could be handled by the augmented pumping equipment while still being traced through the incorporated mass spectrometer. The vacuum chamber used for this experiment was maintained in 100 ntorr pressure range with a foreline pressure of 4 microns. Although sensitivity of the leak detector was diminished by reason of the larger pumping system, this did not affect the overall result in the capture and measurement of a complete leakage rate.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Environmental Sciences; 16; May-June
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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