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- W2109990292 abstract "The aim of this study is the evaluation of the enzymatic action of the ligninolytic enzyme manganese peroxidase (MnP), through a suitable addition of H(2)O(2), as a feasible system for the in vitro degradation of complex structures. For this purpose, a highly recalcitrant polymeric dye (Poly R-478) was selected as a model compound. An amperometric technique was used to determine the H(2)O(2) requirement in the decolorization by nonpurified MnP. Two H(2)O(2) supply strategies-fed-batch (every hour) or semicontinuous (every 5 min)-were applied. The addition of H(2)O(2) in pulses led to a limited decolorization after the pulses and the instantaneous consumption or decomposition of H(2)O(2). Therefore, this way of addition may limit the actual H(2)O(2) concentration in the reaction mixture. In contrast, the semicontinuous strategy maintained lower and prolonged concentrations of H(2)O(2), which allowed a clearly greater decolorization (48% after 2 h). In addition, the effect of Mn(+2) concentration on the decolorization efficiency was investigated to establish the optimal application of the MnP-oxidative system. The enzymatic treatment provoked not only the destruction of the chromophoric groups but also a noticeable breakdown of the chemical structure of the dye. In experiments with pure enzyme, MnP proved to be the main factor responsible for the dye decolorization." @default.
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- W2109990292 date "2001-01-01" @default.
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- W2109990292 title "In vitro degradation of a polymeric dye (Poly R-478) by manganese peroxidase" @default.
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- W2109990292 doi "https://doi.org/10.1002/bit.10052" @default.
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