Download e-book for kindle: Biodegradation and Persistance by Walter Reineke (auth.), B. Beek (eds.)

By Walter Reineke (auth.), B. Beek (eds.)

ISBN-10: 3540625763

ISBN-13: 9783540625766

ISBN-10: 3540680969

ISBN-13: 9783540680963

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When no lignin and manganese peroxidases are produced. P. ostreatus differs from P. chrysosporium in its lignin degradation mechanism in that it does not involve lignin peroxidase activity [126]. Instead, its lignin degradation ability is assumed to be due to laccase activity [127, 128, 131, 170]. Laccase was found to be nonspecific as to its reducing substrate as well as able to oxidize a variety of substrates including polyphenols, methoxy-substituted phenols, diamines, and a range of other compounds.

1 Degradation by Non-Ligninolytic Fungi A variety of fungi have been found to transform aromatic compounds including complex polycyclic aromatic hydrocarbons to metabolites that are similar to those produced by mammalian enzymes. Only a few fungi appear to have the ability to catabolize PAHs to CO2 [124]. In Cunninghamella elegans, a non-ligninolytic fungus, and several other fungi naphthalene is metabolized via a branched pathway to naphthalene trans1,2-dihydrodiol, 1-naphthol, 2-naphthol, 4-hydroxy-1-tetralone, 1,4-naphtho- Aerobic and Anaerobic Biodegradation Potentials of Microorganisms 33 quinone, and 1,2-naphthoquinone (Fig.

21. Proposed pathway for the fungal oxidation of naphthalene. ቢ cytochrome P-450 monooxygenase, ባ epoxide hydrolase 34 W. Reineke Fig. 22. Proposed pathway for the fungal oxidation of anthracene. ቢ cytochrome P-450 monooxygenase, ባ epoxide hydrolase positions may also be oxidized to form trans-3,4-dihydrodiol and trans-9,10dihydrodiol. 1 The Ligninolytic System White rot fungi have the ability to degrade lignin efficiently [125–128]. This capacity results from the activities of a complex system (Fig.

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Biodegradation and Persistance by Walter Reineke (auth.), B. Beek (eds.)

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