Bacterial transformations of 1,2,3,4-tetrahydrodibenzothiophene and dibenzothiophene

Article Abstract:

The bacterial transformation of 1,2,3,4-tetrahydrodibenzothiopene (THDBT) by three strains of Pseudomonas is studied. THDBTs are organosulfur compounds that are elements of petroleum and coal-based liquids. These compounds have been found to be the most resistant to biodegradation in sediments contaminated with oil from the Amoco Cadiz oil spill. The study used gas chromatography with an atomic emission detector to produce an equimolar response to sulfur.

Environmental aspects, Pseudomonas, Bacterial transformation, Organosulfur compounds, Organic sulfur compounds

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Use of fluorinated compounds to detect aromatic metabolites from m-cresol in a methanogenic consortium: evidence for a demethylation reaction

Article Abstract:

Fluorinated analogs of phenol and m-cresol were used to elucidate the pathway of m-cresol degradation by a microbial consortium under methanogenic conditions. The analysis revealed a novel demethylation reaction that transformed 4-hydroxy-2-methylbenzoic acid to 4-hydroxybenzoic acid, with benzoic acid as the final compound in m-cresol metabolism. A proposed pathway for m-cresol degradation under methanogenic conditions is presented.

Physiological aspects, Microbial metabolism, Phenols, Phenols (Class of compounds), Cresol, Cresols

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Aerobic biodegradation of 2,2'-dithiobenzoic acid produced from dibenzothiophene metabolites

Article Abstract:

A study was conducted on the biodegradation of dibenzothiophene (DBT) through the Kodama pathway by Pseudomonas sp. strain BT1d. When provided as the carbon and sulfur source in liquid medium, 2,2'-dithio-dibenzene acid, one of the disulfides formed, was degraded by soil enrichment cultures.

Science & research, Genetic aspects, Observations, Biodegradation, Anaerobic bacteria, Benzthiazide

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