نتایج جستجو برای: dehalogenation

تعداد نتایج: 600  

Journal: :Applied and environmental microbiology 1992
S D Copley G P Crooks

4-Chlorobenzoate degradation in cell extracts of Acinetobacter sp. strain 4-CB1 occurs by initial synthesis of 4-chlorobenzoyl coenzyme A (4-chlorobenzoyl CoA) from 4-chlorobenzoate, CoA, and ATP. 4-Chlorobenzoyl CoA is dehalogenated to 4-hydroxybenzoyl CoA. Following the dehalogenation reaction, 4-hydroxybenzoyl CoA is hydrolyzed to 4-hydroxybenzoate and CoA. Possible roles for the CoA moiety ...

Journal: :Applied and environmental microbiology 1999
J Wiegel X Zhang Q Wu

Ten years after reports on the existence of anaerobic dehalogenation of polychlorinated biphenyls (PCBs) in sediment slurries, we report here on the rapid reductive dehalogenation of para-hydroxylated PCBs (HO-PCBs), the excreted main metabolites of PCB in mammals, which can exhibit estrogenic and antiestrogenic activities in humans. The anaerobic bacterium Desulfitobacterium dehalogenans compl...

Journal: :Catalysts 2021

Selective hydrogenation of halonitrobenzenes into haloanilines represents a green process to replace the environmentally unfriendly non-catalytic chemical reduction in industry. However, this transformation often suffers from serious dehalogenation due easy break carbon-halogen bonds on metal surfaces. Modulations electronic structure supported Pd nanoparticles Lewis-basic layered double hydrox...

Journal: :Microbiological Reviews 1992

Journal: :Dalton transactions 2016
L Szatkowski M B Hall

The nickel(i) octaethylisobacteriochlorin anion ([OEiBCh-Ni(I)]-) is commonly used as a synthetic model of cofactor F430 from Methyl-Coenzyme M Reductase. In this regard, experimental studies show that [OEiBCh-Ni(I)]- can catalyze dehalogenation of aliphatic halides in DMF solution by a highly efficient SN2 reaction. To better understand this process, we constructed theoretical models of the de...

Journal: :Environmental science & technology 2003
April Z Gu H David Stensel Jaana M H Pietari Stuart E Strand

Site evaluation for bioremediation of chlorinated ethenes may need treatability studies to assess the reductive dechlorination potential of vinyl chloride (VC). Dehalogenation of vinyl bromide (VB) was investigated as a surrogate measurement for the dechlorination potential of VC. VB dehalogenation rates and kinetics were studied and compared with those of VC by a methanogenic reductive dechlor...

Journal: :Molecules 2012
Małgorzata Grabarczyk

Bicyclic chloro-, bromo- and iodo-γ-lactones with dimethylcyclohexane rings were used as substrates for bioconversion by several fungal strains (Fusarium, Botrytis and Beauveria). Most of the selected microorganisms transformed these lactones by hydrolytic dehalogenation into the new compound cis-2-hydroxy-4,6-dimethyl-9-oxabicyclo[4.3.0]- nonan-8-one, mainly the (-)-isomer. When iodo-γ-lactone...

Journal: :FEMS microbiology ecology 2004
C Griebler L Adrian R U Meckenstock H H Richnow

Fractionation of stable carbon isotopes upon degradation of trichlorobenzenes was studied under aerobic and anaerobic conditions. Mineralization of 1,2,4-trichlorobenzene by the aerobic strain Pseudomonas sp. P51 which uses a dioxygenase for the initial enzymatic reaction was not accompanied by a significant isotope fractionation. In contrast, reductive dehalogenation by the anaerobic strain De...

Journal: :Electrochimica Acta 2021

Increasing attention is paid to the degradation of refractory halogenated organic compounds in wastewaters. For this purpose, electrocatalytic reduction process constitutes a promising technology due its high selectivity. Owing their well-controlled structure and specific surface area, nanoparticles have been subject many investigations electrocatalysis. This study presents general review on na...

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