Section 26
Chapter 25,798

Fractionation of stable sulfur isotopes by purpureous photosynthesizing sulfur bacteria Rhodopseudomonas sp

Mekhtieva, V.L.; Kondrat'eva, E.N.

Doklady Akademii Nauk SSSR 166(2): 465-468


ISSN/ISBN: 0002-3264
PMID: 5982826
Accession: 025797539

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A study was made of the fractionation of S32 and S34 during the oxidation of Na2S-9H2O by a culture of Rhodopseudomonas sp. Sulfur in the culture fluid was converted to SO2, and the isotope ratio was determined by mass spectrometry. A marked increase was observed in all of the experiments in the S32 content of the residual sulfide, while the S produced was S34 enriched. Only the photosynthetic species displayed selective utilization of the heavy isotope. There is a bibliography with 11 references.

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