Chambers L A, Trudinger P A
Can J Microbiol. 1979 Jun;25(6):719-21. doi: 10.1139/m79-104.
During growth of Clostridium pasteurianum on sulfite, approximately half the sulfite was reduced to sulfide and half to thiosulfate. Sulfide was enriched in 32S or 34S at different stages of growth and thiosulfate was enriched in 32S, particularly in the sulfane atom. It is suggested that thiosulfate in these bacterial cultures arose from a secondary chemical reaction. The chemical formation of thiosulfate from sulfide and sulfite was also accompanied by sulfur isotope fractionation. The implications of these results with respect to 'inverse' isotopic effects are discussed.
在巴氏梭菌利用亚硫酸盐生长的过程中，约一半的亚硫酸盐被还原为硫化物，另一半被还原为硫代硫酸盐。在生长的不同阶段，硫化物富含32S或34S，而硫代硫酸盐富含32S，特别是在硫烷原子中。研究表明，这些细菌培养物中的硫代硫酸盐来自二级化学反应。硫化物和亚硫酸盐化学形成硫代硫酸盐的过程中也伴随着硫同位素分馏。本文讨论了这些结果对于“反向”同位素效应的意义。
