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|Type:||Artigo de periódico|
|Title:||Biomass Photochemistry Xiii: Pre-irradiated Lignin From Pinus Radiata D. Don And Its Degradation By Ligninase And Horse-radish Peroxidase|
|Abstract:||The degradation of dioxane-lignin from Pinus radiata D. Don caused by ligninase and by horse-radish peroxidase under photochemical pretreatment was studied. The photochemical modifications of the dioxanelignin were followed using UV-visible spectroscopy and fluorescence. A rapid decrease in the lignin fluorescence at 400 nm (λexc = 360 nm) after irradiation at different fluences was observed. There is a correlation between the ligninase activity and the photon emission of the enzymatic systems as measured by the oxidation of veratryl alcohol. A high reactivity during the oxidation of lignin at different fluences of irradiation was found by the photon emission technique. The photon emission in lignin degradation by ligninase is similar to that observed in the peroxidase-catalysed oxidation of lignin. Photon emission is an excellent method for measuring the ligninase activity on modified lignin. © 1988.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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