Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/81042
Type: Artigo de periódico
Title: LIGNIN DEGRADATION DURING SOFTWOOD DECAYING BY THE ASCOMYCETE CHRYSONILIA-SITOPHILA
Author: FERRAZ, A
DURAN, N
Abstract: Softwood Pinus radiata was degraded by the ascomycete Chrysonilia sitophila during 3 months. The total weight loss of the wood was 20% and the carbohydrate and lignin losses were 18% and 25%, respectively. Decayed wood was extracted with solvents of increasing polarity. Methanol and dioxane yielded extracts containing representative low molecular weight degraded lignins. The overall structure of the degraded lignins, as shown by U.V./visible, I.R., H-1 and C-13 NMR spectroscopy, GPC, functional group and elemental analyses, was compared with the structure of milled wood lignin extracted from undecayed P. radiata. The compilation of the data allows us to suggest oxidative C alpha-C beta and beta-O-aryl cleavages for the mechanism of lignin degradation by this ascomycete. New saturated carbons on the side chain of the degraded lignins were detected. Based on these data a reductive ability of this microorganism was also suggested.
Subject: ASCOMYCETE
CHRYSONILIA SITOPHILA
LIGNIN BIODEGRADATION
WOOD BIODEGRADATION
Country: Holanda
Editor: Kluwer Academic Publ
Rights: fechado
Identifier DOI: 10.1007/BF00695257
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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