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By Jim C. Spain, Joseph B. Hughes, Hans-Joachim Knackmuss

ISBN-10: 1566705223

ISBN-13: 9781566705226

Jam-packed with useful purposes and study, Biodegradation of Nitroaromatic Compounds and Explosives provides a global standpoint on environmental illness from explosives. It covers biodegradation suggestions for DNT and a large choice of alternative nitroaromatic compounds of environmental importance and makes the knowledge obtainable to training environmental and chemical engineers. Biodegradation of Nitroaromatic Compounds and Explosives promises a synthesis of ongoing learn and an appreciation of the striking diversity of biochemical options to be had for the transformation of nitroaromatic compounds. It offers a pragmatic overview of the present and capability box functions of a number of the ideas.

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Extra resources for Biodegradation of nitroaromatic compounds and explosives

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Even after separation of the two degradation processes, an acclimation period was required for 2,6-DNT degradation. A much longer acclimation period was required for the VAAP soil than for the BAAP soil. The 2,6-DNT-degrading bacteria were much more tolerant of nitrite accumulation than the 2,4-DNT-degrading cultures, and the high nitrite levels that were carried over from the 2,4-DNT reactors into the 2,6-DNT reactors had no effect on 2,6-DNT degradation. The conclusion can be drawn that when both 2,4- and 2,6-DNT are present, 2,6-DNT degradation is the limiting step, and separation of the two operations can enhance the overall bioremediation system.

Thus, it is clear that the two types of enzymes are homologous. P. 44 Downstream of amnC are two putative ORFs with similarity to genes encoding ATP-dependent RNA helicases. Although it is not known if either of the ORFs produces a functional protein, the fact that no pathway-relevant genes are encoded in the sequence flanking amnBAC distinguishes the organization of the genes in JS45 from the gene organization of the extradiol cleavage pathway in other microorganisms. The results clearly indicate that the genes for the NB degradative pathway in P.

9A). 147 Enzymes in P. pseudoalcaligenes JS45 initially reduce NB through nitrosobenzene to hydroxylaminobenzene. 90 Several of the genes involved in NB degradation have been cloned and sequenced, and a number of the enzymes have been purified. 186 NB and nitrosobenzene are reduced by the purified enzyme in the presence of NADPH, but hydroxylaminobenzene is not; the enzyme is unable to reduce the nitro group all the way to the amine. 8 N O H N N H OH H E H R2 H N O H H E R2 Proposed mechanisms for (A) acid-catalyzed and (B) enzyme-catalyzed Bamberger rearrangements of hydroxylaminobenzene.

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Biodegradation of nitroaromatic compounds and explosives by Jim C. Spain, Joseph B. Hughes, Hans-Joachim Knackmuss

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