Characterization of chloroethylene dehalogenation by cell extracts of Desulfomonile tiedjei and its relationship to chlorobenzoate dehalogenation

Article Abstract:

Characterization of chloroethylene dehalogenation by cell extracts of Desulfomonile tiedjei reveals that the dehalogenation of tetrachloroethylene in D. tiedjei is catalyzed by a dehalogenase considered to be specific for meta-halobenzoates. Tetrachloroethylene dehalogenation is heat sensitive, not oxygen labile, and increases in proportion to the protein mass in the assay mixtures, showing similarity to 3-chlorobenzoate dehalogenation activity. These activities require hydrogen or formate as an electron donor, and methyl viologen or triquat as an electron carrier in vitro.

Observations, Bacteria, Vinyl chloride

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Reduction of 3-chlorobenzoate, 3-bromobenzoate, and benzoate to corresponding alcohols by Desulfomicrobium escambiense, isolated from a 3-chlorobenzoate-dechlorinating coculture

Article Abstract:

A research was conducted to study the dechlorinating capabilities of Desulfomicrobium escambiense and the coculture from which D. escambiense was isolated. D. escambiense failed to form benzyl alcohol or succinnate during sulfate reduction indicating that the latter was the preferred reductive mechanism. Results showed Desulfovibrio desulfuricans capable of bidirectional transformation of aromatic aldehydes under nitrate-dissimilating conditions.

Anaerobic bacteria, Aldehydes, Chlorobenzene, Chlorobenzenes

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Reductive dehalogenation and mineralization of 3-chlorobenzoate in the presence of sulfate by microorganisms from a methanogenic aquifier

Article Abstract:

The reductive dehalogenation and mineralization of 3-chlorobenzoate (3CBNz) in the presence of sulfate by microorganisms from a methanogenic aquifer was investigated. The study aimed to show 3CBz biodegration by the microbiota of these sediments in the presence of high concentrations of sulfate. Results reveal that the effect of sulfate on 3CBz biodegration varied in relation to the incubation mixture's enrichment history.

Microorganisms, Aquifers, Biomineralization

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