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Effects of space vacuum and solar ultraviolet irradiation (254 nanometers) on the colony forming ability of Bacillus subtilis sporesBacillus subtilis spores are highly resistant to harsh environments. Therefore, in the Apollo 16 Microbial Response to Space Environment Experiment (M191), these spores were exposed to space vacuum or solar ultraviolet irradiation, or both, to estimate the change of survival for terrestrial organisms in space. The survival of the spores was determined in terms of colony-forming ability. Comparison of the flight results with results of simulation experiments on earth applying high vacuum or ultraviolet irradiation, or both, revealed no remarkable difference. Simultaneous exposure to both these space factors resulted in a synergistic effect (that is, an ultraviolet supersensitivity). Therefore, the change of survival in space is assumed to depend on the degree of protection against solar ultraviolet irradiation.
Document ID
19730015381
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Buecker, H.
(Johann-Wolfgang-Goethe-Univ. Frankfurt am Main, Germany)
Horneck, G.
(Johann-Wolfgang-Goethe-Univ. Frankfurt am Main, Germany)
Wollenhaupt, H.
(Johann-Wolfgang-Goethe-Univ. Frankfurt am Main, Germany)
Date Acquired
August 7, 2013
Publication Date
May 1, 1973
Publication Information
Publication: NASA. Johnson Space Center Proc. of the Microbial Response to Space Environ. Symp.
Subject Category
Biosciences
Accession Number
73N24108
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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