Anaerobic degradation of m-cresol by a sulfate-reducing bacterium

Article Abstract:

Desulfotomaculum sp. strain Groll can degrade m-cresols through an initial para-carboxylation reaction. Cresols are phenolic by-products that can cause severe pollution because they are toxic and migrate quickly in subsurface conditions. The Groll strain is a bacterium that is a gram-positive, spore-forming mesophilic microbe that grows under anaerobic conditions. It can thrive either in freshwater or saltwater. The m-cresols are reduced through methyl group oxidation and which is a distinct pathway for the catabolism of the substances.

Environmental aspects, Anaerobic bacteria, Cresol, Cresols

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Methanogenic degradation of poly(3-hydroxyalkanoates)

Article Abstract:

Microorganisms in an anaerobic sewage sludge are capable of degrading poly(3-hydroxyalkanoates) (PHAs). This was based on studies showing that the PHAs poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (P (HB-co-HV)) can be methanogenically degraded by cultures of anaerobic sludge inoculum. Gas chromatography reveal that up to 96% of substrate carbon can be converted to methane and carbon dioxide. These results prove that anaerobic environments arepotentially useful for degrading plastics made of PHAs.

Biopolymers, Biotic communities

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Bacterial transformations of naphthothiophenes

Article Abstract:

Microbiological research suggests that naphtho[2,1-b]thiophene is broken down more by Pseudomonas microorganisms than naphtho[2,3-b]thiophene in the presence of 1-methylnaphthalene. The dioxygenase reaction on the naphtho[2,1-b]thiophene nucleus is affected by the methyl group of 1-methylnaphtol[2,1-b]thiophene. Chemical structures and ring-numbering conventions are shown.

Bioremediation, Petroleum chemicals industry, Petrochemicals industry

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