Superoxide radical assays and applications in Mars-like Atacama soils

Details Superoxide radical assays and applications in Mars-like Atacama soils Superoxide radical assays and applications in Mars-like Atacama soils

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgrg..11204s13g&link_type=abstract

Journal of Geophysical Research, Volume 112, Issue G4, CiteID G04S13

Mathematics

Logic

Biogeosciences: Life In Extreme Environments, Biogeosciences: Astrobiology And Extraterrestrial Materials, Oceanography: Biological And Chemical: Oxidation/Reduction Reactions (0471)

Scientific paper

Soils on Mars are thought to accumulate superoxide radicals, as they are formed continually by UV radiation hits on basalt minerals. Yet, beyond electron paramagnetic resonance (EPR) spectroscopy, no other methods exist that detect and quantify superoxide radicals in soils. This study describes two such assays that are based on the reaction of superoxide radical with hydroethidine and oxidized cytochrome c. They are unique in being able to test unambiguously for the presence of superoxide in a soil matrix with a high level of accuracy. Applications with soils from the Atacama Desert showed that the sensitivity of the assays is equal to or greater than that of EPR spectroscopy.

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