Mercury methylation by interspecies hydrogen and acetate transfer between sulfidogens and methanogens

Article Abstract:

A study was conducted to examine the effects of interspecies hydrogen and acetate transfers on the methylation of Hg2+ under a sulfate-limited environment. Oxygen traces were removed by passing nitrogen through a reduced heated copper column while Desulfovibrio desulfuricans strains were prepared in a modified medium. The protein contents of D. desulfuricans cultures were inoculated into lactate-carbonate coculture medium. Results showed that bromoethanesulfonic acid permitted marginal protein synthesis by the coculture.

Hydrogen, Mercury, Mercury (Metal), Acetates

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Microbial metabolism of pyridine, quinoline, acridine, and their derivatives under aerobic and anaerobic conditions

Article Abstract:

Various microorganisms enzymatically degrade pyridines, aza-arenes and other heterocyclic aromatic compounds under both aerobic and anaerobic conditions. Different microorganisms can degrade these compounds under different environmental conditions using different enzymes and metabolic pathways. Pyridine carboxylic acids have the fastest and halogenated pyridines the slowest rate of biodegradation. Transformations involving oxygen derived from water can also occur under anaerobic conditions.

Microbial metabolism, Aromatic compounds

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Changes in GE2270 antibiotic production in Planobispora rosea through modulation of methylation metabolism

Article Abstract:

Research demonstrates that addition of vitamin B12 doubles the production of thiazolylpeptide GE2270 antibiotic complex and enhances the biosynthesis of methylated component A?by the actinomycete Planobispora rosea ATCC 53773. Results indicate that increased production of GE2270 antibiotic is due via methylation pathway activation.

Italy, Manufacturing processes, Antibiotics, Influence, Production processes, Microbiological synthesis, Methylation, Vitamin B12

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