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

Jam-packed with sensible functions and examine, Biodegradation of Nitroaromatic Compounds and Explosives provides a world point of view on environmental infection from explosives. It covers biodegradation techniques for DNT and a wide selection of different nitroaromatic compounds of environmental importance and makes the data available to training environmental and chemical engineers. Biodegradation of Nitroaromatic Compounds and Explosives supplies a synthesis of ongoing examine and an appreciation of the extraordinary variety of biochemical recommendations to be had for the transformation of nitroaromatic compounds. It offers a practical overview of the present and strength box functions of many of the recommendations.

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2,3DNT has not been demonstrated to be biodegradable and can thus be considered a conservative tracer that reflects the effects of abiotic processes. The much greater decrease in 2,4- and 2,6-DNT concentrations can therefore be attributed to biological activity. 148 The understanding of the 2,4-DNT catabolic pathway taken with laboratory studies with soil from the site, disappearance of DNT from the monitoring wells, and the isolation of bacteria able to degrade DNT from the same wells provides evidence that MNA might be applicable at the site.

85 Lethal toxic doses, estimated to be 1 to 5 g for the average adult, are readily absorbed via inhalation, cutaneous contact, and ingestion. 53 The toxicity of airborne NB requires remediation strategies that decrease or minimize NB transfer to the atmosphere. Such minimization of volatilization is a recurrent theme among the NB biodegradation strategies discussed below. 1 Pathways Early investigations sought NB disappearance in soil and sewage sludge with results that hinted at but did not prove degradation.

Putida,115 but the aminophenol dioxygenase is a heterotetramer with an α2β2 structure, whereas the catechol dioxygenase is a homotetramer. Ferrous iron is present in both enzymes as a cofactor, but there is one molecule of ferrous iron for each subunit of the catechol dioxygenases and only one for every two subunits of the 2-aminophenol dioxygenases. The β subunit of 2-aminophenol dioxygenase, but not the α subunit, shares regions of limited amino acid sequence similarity with homoprotocatechuate 2,3-dioxygenases © 2000 by CRC Press LLC L1522-frame-C02 Page 41 Thursday, May 18, 2000 12:58 PM of E.

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