Amino Acid Biosignatures - Implications for the Detection of Extinct Or Extant Microbial Communities on Mars

Amino Acid Biosignatures - Implications for the Detection of Extinct Or Extant Microbial Communities on Mars

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The studies herein investigate organic components within Mars analog environmental samples and specifically characterize the concentrations and distributions of amino acids and their diagenetic products. Kinetic modeling of degradation reactions within ancient Mars analog minerals allows for the lifetimes of these bioorganic compounds to be estimated. The degree of amino acid preservation from an extinct biota will be much greater within Mars' near-surface environments due to the characteristic cold temperatures and dry climates. Extrapolations of terrestrial amino acid stability models show the potential for preservation within sulfate minerals over billions of years on Mars.... the samples were separated by RP-HPLC and quantified with a fluorescence detector. The RP-HPLC setup utilizes an Hitachi L6200 Intelligent HPLC pumps, rheodyne sample injectors, coupled with a Phenomenex Luna-C18(2) RP-HPLC column and a Shimadzu fluorescence detector (model RF- 535). Data sampling and analysis, including automatic and manual Gaussian peak integrations, anbsp;...


Title:Amino Acid Biosignatures - Implications for the Detection of Extinct Or Extant Microbial Communities on Mars
Author:
Publisher:ProQuest - 2008
ISBN-13:

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