[Antimutagenic activity of the enzyme preparation "binase" in microbial test systems]

The occurrence of microorganisms and the rates of terminal biogenic reduction of sulfates and synthesis of methane in stratal waters in deposit 302 of Bashkir Carboniferous deposition at the Romashkinskoe oil field were studied. It was shown that deposit 302 is a dynamic, highly reduced ecosystem containing sulfates and hydrogen sulfide in considerable concentrations, in which active biogenic processes occur. Sulfate reduction is a dominating anaerobic process by which the organic constituents of oil are transformed. The sulfate-reducing microflora is quite varied and characterized by high metabolic potentials. Enriched cultures, which can oxidize many organic substances, such as benzoate, acetate, ethanol, or lactate, at the expense of reduction of sulfates and ferric ion, were isolated from the samples extracted from deposit 302. It was suggested that the sulfate-reducing microflora might be responsible not only for sulfate reduction in the stratum but also for mobilization of part of insoluble iron oxides in the oil trap rock. The findings indicate that the dissimilation sulfate- and iron-reducing bacteria can contribute to the geochemistry of organic and mineral compounds in underground ecosystems.