Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6087
Título: Biovalorization of technical lignins for added-value products and applications
Autor: Duarte, J. C. Cardoso
Malcata, F.
Moreira, P.
Almeida-Vara, E.
Sena-Martins, G.
Palavras-chave: Bio-materials
Enzymes
Lignin
Data: 2005
Editora: ETA / WIP-Munich
Citação: DUARTE, J. C. Cardoso... [et al.] - Biovalorization of technical lignins for added-value products and applications. In European Biomass Conference Biomass for Energy, Industry and Climate Protection, 14, Paris, France, 17-21 October, 2005 - Proceedings of the 14th European Biomass Conference Biomass for Energy, Industry and Climate Protection. [S.l. : ETA / WIP-Munich, 2005]. ISBN 88-89407-07-7. 4 p.
Resumo: Lignin is an abundant non-toxic amorphous natural polymer. Nowadays it is available a great variety and large amounts of technical lignins as by-products from the pulp and paper industries. Some successful biotechnological applications of enzymatically modified lignins are described in the literature, namely for the production of lignin based copolymers, binders for wood composites, chelating agents, compositions for treating porous materials, coatings, paintings and others. From a new species from Bjerkandera genus which exhibits high decolourisation activity on Poly R-478 and Remazol Brilliant Blue R (RBBR) dyes, was isolated, purified and identified the main enzyme responsible for Remazol Brilliant Blue R dye decolourisation. Such an enzyme is able to oxidise manganese, as well as VA and DMP in manganese-independent reactions; the enzyme substrate range for oxidation of several phenolic and non-phenolic aromatic compounds was determined. This enzyme was tested for transformation of a lignin fraction obtained from straw pulping. Characterisation by gel filtration chromatography of the evolution of the molecular mass distribution of the lignin fragments generated by said enzyme indicated that this enzyme is able to interact directly with lignin in the absence of other mediators.
Peer review: no
URI: http://hdl.handle.net/10400.14/6087
Aparece nas colecções:ESB - Artigos em Actas / Papers in proceedings

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