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Laccases for enzymatic colouration of unbleached cotton
Kim, Suyeon; Moldes, Diego; Paulo, Artur CavacoThe concept presented in this paper is the utilisation of the natural flavonoids present in cotton as anchors to attach other phenolic compounds to the fiber surface. Laccase can catalyze the oxidation of flavonoids in solution producing quinones that can be further polymerised and grafted onto surface of the cotton providing yellow to brown colouration, depending on the external flavonoids used and on the reac...
Enhanced stability of laccase by xylitol
Zille, Andrea; Moldes, Diego; Irgoliç, Ramona; Paulo, Artur CavacoLaccase is a multicopper oxidase able to perform one-electron oxidation of several aromatic substrates. The application of laccase on wood delignification, drug analysis, biosensor, wine clarification, bioremediation, etc., was proposed [1]. As every enzymatic system, laccase has some limitations due to the reaction conditions, mainly temperature and pH. Deactivation of laccase at pH values over 6 and lower 3 a...
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