Fluorescence microscopy as a tool for in situ life dete

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DOIResolve DOI: http://doi.org/10.1089/ast.2007.0043
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TypeArticle
Journal titleAstrobiology
ISSN1531-1074
1557-8070
Volume8
Issue4
Pages859874
AbstractThe identification of extant and, in some cases, extinct bacterial life is most convincingly and efficiently performed with modern high-resolution microscopy. Epifluorescence microscopy of microbial autofluorescence or in conjunction with fluorescent dyes is among the most useful of these techniques. We explored fluorescent labeling and imaging of bacteria in rock and soil in the context of in situ life detection for planetary exploration. The goals were two-fold: to target non-Earth-centric biosignatures with the greatest possible sensitivity and to develop labeling procedures amenable to robotic implementation with technologies that are currently space qualified. A wide panel of commercially available dyes that target specific biosignature molecules was screened, and those with desirable properties (i.e., minimal binding to minerals, strong autofluorescence contrast, no need for wash steps) were identified. We also explored the potential of semiconductor quantum dots (QDs) as bacterial and space probes. A specific instrument for space implementation is suggested and discussed.
Publication date
PublisherMary Ann Liebert
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC publication
This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NPARC number23001883
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Record identifier57ee6992-5b84-4773-9a65-d7f71dd599df
Record created2017-05-05
Record modified2017-05-05
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