Laccase from Pycnoporus cinnabarinus and phenolic compounds: can the efficiency of an enzyme mediator for delignifying kenaf pulp be predicted?
| Autor: | Glòria Andreu, Teresa Vidal |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera, Universitat Politècnica de Catalunya. CIPAGRAF - Grup de Recerca Paperer i Gràfic |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Acetosyringone
Environmental Engineering Oxidation-reduction reaction Bioengineering engineering.material Lignin Syringaldehyde Kenaf chemistry.chemical_compound Phenols Organic chemistry Waste Management and Disposal Laccase biology Materials compostos Plant Extracts Renewable Energy Sustainability and the Environment Chemistry Pulp (paper) Vanillin General Medicine Pycnoporus cinnabarinus biology.organism_classification Pulp and paper industry Pycnoporus Fibres vegetals Hibiscus Oxidation–reduction potential engineering Phenolic mediators Enzims Oxidation-Reduction Enginyeria química::Química analítica::Anàlisi enzimàtica [Àrees temàtiques de la UPC] |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| Popis: | In this work, kenaf pulp was delignified by using laccase in combination with various redox mediators and the efficiency of the different laccase–mediator systems assessed in terms of the changes in pulp properties after bleaching. The oxidative ability of the individual mediators used (acetosyringone, syringaldehyde, p-coumaric acid, vanillin and actovanillone) and the laccase–mediator systems was determined by monitoring the oxidation–reduction potential (ORP) during process. The results confirmed the production of phenoxy radicals of variable reactivity and stressed the significant role of lignin structure in the enzymatic process. Although changes in ORP were correlated with the oxidative ability of the mediators, pulp properties as determined after the bleaching stage were also influenced by condensation and grafting reactions. As shown here, ORP measurements provide a first estimation of the delignification efficiency of a laccase–mediator system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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