Results 171 to 180 of about 7,561 (225)

Bacterial dehalogenation

Applied Microbiology and Biotechnology, 1998
Halogenated organic compounds are produced industrially in large quantities and represent an important class of environmental pollutants. However, an abundance of haloorganic compounds is also produced naturally. Bacteria have evolved several strategies for the enzyme-catalyzed dehalogenation and degradation of both haloaliphatic and haloaromatic ...
openaire   +2 more sources

Bioelectrochemical system for dehalogenation: A review

Environmental Pollution, 2022
Halogenated organic compounds are persistent pollutants, whose persistent contamination and rapid spread seriously threaten human health and the safety of ecosystems. It is difficult to remove them completely by traditional physicochemical techniques.
Xuemei Zhu, Xin Wang, Nan Li, Qi Wang, Chengmei Liao   +4 more
openaire   +2 more sources

Dehalogenation

ChemInform, 2006
AbstractFor Abstract see ChemInform Abstract in Full Text.
openaire   +1 more source

Catalytic Dehalogenation of Aryl Halides Mediated by a Palladium/Imidazolium Salt System

Organometallics, 2001
A convenient and efficient catalytic aryl halide dehalogenation protocol has been developed using an imidazolium salt/palladium/base system. The use of the ligand precursor SIMes .
Mihai S Viciu, Gabriela A Grasa, Steven P Nolan   +2 more
exaly   +2 more sources

Dehalogenation in environmental biotechnology

Current Opinion in Biotechnology, 1994
During the past year, the field of dehalogenation has seen rapid progress in the identification of novel organisms, the sequencing of new genes, and the delineation of mechanisms for important enzymes. Newly identified anaerobic organisms are beginning to offer insights into a previously obscure, but important, group of bacteria involved in ...
openaire   +2 more sources

Tetrachloroethene-dehalogenating bacteria

Folia Microbiologica, 1999
Tetrachloroethene is a frequent groundwater contaminant often persisting in the subsurface environments. It is recalcitrant under aerobic conditions because it is in a highly oxidized state and is not readily susceptible to oxidation. Nevertheless, at least 15 organisms from different metabolic groups, viz.
openaire   +2 more sources

THE DEHALOGENATION OF DIHALOGENOMETHYLENEBISPHOSPHONATES

Phosphorus and Sulfur and the Related Elements, 1984
Abstract Tetraesters of dihalogenomethylenebisphosphonic acids undergo nucleophilic dehalogenation with potassium fluoride or hydroxide in solution in acetonitrile in the presence of [18,6]-crown ether. Fluoride ion is the best nucleophile for dehalogenation and there is no evidence for nucleophilic displacement of halide ion by attack at the central ...
D. W. Hutchinson, G. Semple
openaire   +1 more source

Biochemistry of Catabolic Reductive Dehalogenation

Annual Review of Biochemistry, 2017
A wide range of phylogenetically diverse microorganisms couple the reductive dehalogenation of organohalides to energy conservation. Key enzymes of such anaerobic catabolic pathways are corrinoid and Fe–S cluster–containing, membrane-associated reductive dehalogenases.
Maeva, Fincker, Alfred M, Spormann
openaire   +2 more sources

GENETICS AND BIOCHEMISTRY OF DEHALOGENATING ENZYMES

Annual Review of Microbiology, 1994
Microorganisms that can utilize halogenated compounds as a growth substrate generally produce-enzymes whose function is carbon-halogen bond cleavage. Based on substrate range, reaction type and gene sequences, the dehalogenating enzymes can be classified in different groups, including hydrolytic dehalogenases, glutathione transferases, monooxygenases ...
D B, Janssen, F, Pries, J R, van der Ploeg   +2 more
openaire   +2 more sources

Biological dehalogenation and halogenation reactions

Chemosphere, 2003
A large number of halogenated compounds is produced by chemical synthesis. Some of these compounds are very toxic and cause enormous problems to human health and to the environment. Investigations on the degradation of halocompounds by microorganisms have led to the detection of various dehalogenating enzymes catalyzing the removal of halogen atoms ...
Karl Heinz, van Pée, Susanne, Unversucht   +1 more
openaire   +2 more sources