Fungal colonization of synthetic substrates for use in space craft |
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Authors: | D G Ahearn R B Simmons D L Price L Ajello S A Crow S K Mishra D L Pierson |
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Institution: | (1) Department of Biology, Georgia State University, PO Box 4010, 30302-4010 Atlanta, GA, USA;(2) Interface Research Corp., Kennesaw, GA, USA;(3) Department of Ophthalmology, Emory University, Atlanta, GA, USA;(4) KRUG Life Sciences, Houston, TX, USA;(5) Biomedical Operations and Research Branch, NASA-Johnson Space Center, Houston, TX, USA |
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Abstract: | Summary Materials being used or considered for use in space flight were examined for their susceptibility to fungal colonization. The materials included soft goods (clothing) and insulation and fabrication products such as Velcro® attachments and elastic cord binders. Materials were exposed for at least 28 days in a highhumidity chamber colonized with over 50 species of fungi, including those species recommended for determining recalcitrance of materials to fungal biodegradation. At least nine of 25 products demonstrated extensive microscopic colonization by fungi, mostly byAcremonium obclavatum. Challenge procedures that rely on observations with the unaided eye, or 40×magnification of growth by a restricted number of fungal species with a cellulosic substrate as a positive control, are insufficient for determining the resistance of synthetic substrates to fungal colonization. |
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Keywords: | Fungal colonization Space craft materials Acremonium obclavatum |
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