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Resistance tests with bacterial strains isolated from spacecraft assembly halls

Weber, Immanuel (2008) Resistance tests with bacterial strains isolated from spacecraft assembly halls. Bachelor's, University of Applied Science Bonn-Rhein-Sieg.

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Abstract

In order to achieve a better knowledge about the presence of microorganisms in Spacecraft Assembly Facilities that are able to resist potential hostile conditions, different tests on survival were carried out in this work. Basis for this investigation is the planetary protection policy that defines the rules to avoid contamination of celestial bodies with organisms from earth, or vice versa. In this work a set of ten isolated bacterial samples was tested for their resistance to different simulated space or mars-like conditions, to find out how big the chance is that some of the isolates survive and to find out if and which strains are more resistant than others. Therefore, ten bacterial strains isolated from one Spacecraft Assembly Facility were dried over night and then exposed to UV-C radiation, vacuum, dessication and UV-C radiation combined with a simulated Martian atmosphere. The titer of the bacterial isolates was determined by plate count and then evaluated. Four isolates and the reference strain survived all test conditions even though with sometimes high inactivation values and five strains did not survive at all or at least only one of the test conditions.

Document Type:Thesis (Bachelor's)
Title:Resistance tests with bacterial strains isolated from spacecraft assembly halls
Authors:
AuthorsInstitution or Email of Authors
Weber, ImmanuelUNSPECIFIED
Date:2008
Number of Pages:67
Status:Unpublished
Keywords:planetary protection, microorganisms, Spacecraft Assembly Facilities, Resistance tests,
Institution:University of Applied Science Bonn-Rhein-Sieg
Department:Department of Natural Sciences
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Strahlenbiologie (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kerstin Kopp
Deposited On:09 Feb 2009
Last Modified:27 Apr 2009 15:48

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