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''Dehalococcoides'' is a genus of bacteria within class Dehalococcoidetes that obtain energy via the oxidation of hydrogen gas and subsequent reductive dehalogenation of halogenated organic compounds in a mode of anaerobic respiration called dehalorespiration.〔See the NCBI (webpage on Dehalococcoides ). Data extracted from the (【引用サイトリンク】 title=NCBI taxonomy resources )〕 ==Reductive dehalogenation== The first member of the "''Dehalococcoides''" (DHC) group, "''Dehalococcoides ethenogenes''", now ''D. mccartyi'' strain 195 (DET) was described in 1997, and is noted for its potential use in the bioremediation of tetrachloroethene (PCE) and trichloroethene (TCE) contaminated ground water sites.〔 〕 Additional DHC members were later described. These include CBDB1, BAV1, VS, and GT. High DHC population numbers and electron substrate concentrations are necessary for effective bioremediation of dense non-aqueous phase liquids (DNAPL) contamination sites. Addition of either fermentable substrate to create hydrogen gas ''in situ'', or inoculation of the site with mixed cultures containing ''Dehalococcoides'' are required for effective remediation. Other dechlorinating microbes are also responsible for the PCE → TCE → 1,2-Dichloroethene (1,2-DCE) sequence of ethene dehalogenation,〔 but these organisms often fail to continue the degradation sequence from 1,2-DCE to vinyl chloride (VC), and finally, ethene (1,2-DCE → VC → ethene), which is environmentally benign. ''Dehalococcoides'' effectively converts 1,2-DCE to VC, and its presence in groundwater may be necessary for proper bioremediation of contaminated sites. Mixed ''Dehalococcoides'' species can also bioremediate environmental sites contaminated with polychlorinated biphenyls (PCBs). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dehalococcoides」の詳細全文を読む スポンサード リンク
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