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Sulfur isotope signatures provide key information for the study of microbial activity in modern systems and the evolution of the Earth surface redox system.
Microbial sulfate reducers shift sulfur isotope distributions by discriminating against heavier isotopes.
The lake, in this case, has a different radiocarbon reservoir than that of the majority of the radiocarbon in the biosphere and therefore an accurate radiocarbon age requires that a correction be made to account for it.
Human plasma, representing the most complete record of the individual phenotype, is an appealing sample for proteomics analysis in clinical applications.