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- W2110099521 abstract "Extracellular laccase produced by the wood-rotting fungus Cerrena unicolor was immobilized covalently on the mesostructured siliceous cellular foams (MCFs) functionalised using various organosilanes with amine and glycidyl groups. The experiments indicated that laccase bound via glutaraldehyde to MCFs modified using 2-aminoethyl-3-aminopropyltrimethoxysilane remains very active. In the best biocatalyst activity was about 42,700 U mL−1 carrier (66,800 U mg−1 bound protein), and hence significantly higher than ever reported before. Optimisation of the immobilization procedure with respect to protein concentration, pH of coupling mixture and the enzyme purity afforded the biocatalyst with activity of about 90,980 U mL−1. For the best preparation, thermal- and pH-stability, and activity profiles were determined. Experiments carried out in a batch reactor showed that kcat/Km for immobilized enzyme (0.88 min−1 μM−1) was acceptable lower than the value obtained for the native enzyme (2.19 min−1 μM−1). Finally, potentials of the catalysts were tested in the decolourisation of indigo carmine without redox-mediators. Seven consecutive runs with the catalysts separated by microfiltration proved that adsorption of the dye onto the carrier and enzymatic oxidation contribute to the efficient decolourisation without loss of immobilized enzyme activity." @default.
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- W2110099521 date "2009-02-01" @default.
- W2110099521 modified "2023-10-18" @default.
- W2110099521 title "Laccase immobilization on mesostructured cellular foams affords preparations with ultra high activity" @default.
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- W2110099521 doi "https://doi.org/10.1016/j.procbio.2008.10.007" @default.
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