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Thermoradiation inactivation of naturally occurring organisms in soilSamples of soil collected from Kennedy Space Center near spacecraft assembly facilities were found to contain microorganisms very resistant to conventional sterilization techniques. The inactivation behavior of the naturally occurring spores in soil was investigated using dry heat and ionizing radiation, first separately, then in combination. Dry heat inactivation rates of spores were determined for 105 and 125 C. Radiation inactivation rates were determined for dose rates of 660 and 76 krad/hr at 25 C. Simultaneous combinations of heat and radiation were then investigated at 105, 110, 115, 120, and 125 C. Combined treatment was found to be highly synergistic requiring greatly reduced radiation doses to accomplish sterilization.
Document ID
19730016677
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Reynolds, M. C. (Sandia National Labs. Albuquerque, NM, United States)
Lindell, K. F. (Sandia National Labs. Albuquerque, NM, United States)
David, T. J. (Sandia National Labs. Albuquerque, NM, United States)
Date Acquired
August 7, 2013
Publication Date
May 1, 1973
Subject Category
Geophysics
Report/Patent Number
NASA-CR-132197
SLA-73-0161
Accession Number
73N25404
Funding Number(s)
CONTRACT_GRANT: NASA ORDER W-12853
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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