Studies on Lignin. VI. Nitrobenzene Oxidation of Lignin Sulphonic Acids.
نویسندگان
چکیده
منابع مشابه
Modification of Lignin and Lignin Rich Fibers via Oxoreductase Enzymes Oxidation of Isolated Lignin with Laccase Lignin preparations from either pulping
Oxidation of Isolated Lignin with Laccase Lignin preparations from either pulping processes or from known isolation techniques have been treated with laccase relatively infrequently. This may be due to the media in which the lignin is isolated, since lignin is not water-soluble and laccase enzymes function optimally in aqueous environments. The reaction of laccase with insoluble lignin would be...
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The mechanism by which lignin peroxidase (Lip) interacts with the lignin polymer is discussed. Veratryl alcohol (Valc), a secondary metabolite of white rot fungi, acts as a cofactor for the enzyme. The Lip-redox cycle is discussed in terms of Marcus theory of electron transfer. It is proposed that reaction of a nucleophile in the active site channel with the incipient Valc'. is an essential eve...
متن کاملRole of surface tryptophan for peroxidase oxidation of nonphenolic lignin
BACKGROUND Despite claims as key enzymes in enzymatic delignification, very scarce information on the reaction rates between the ligninolytic versatile peroxidase (VP) and lignin peroxidase (LiP) and the lignin polymer is available, due to methodological difficulties related to lignin heterogeneity and low solubility. RESULTS Two water-soluble sulfonated lignins (from Picea abies and Eucalypt...
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The objective of this research was to identify the biochemical agents responsible for the oxidative degradation of lignin by the white-rot fungus Phanerochaete chrysosporium. We examined the hypothesis that activated oxygen species are involved, and we also sought the agent in ligninolytic cultures responsible for a specific oxidative degradative reaction in substructure model compounds. Result...
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Many modern launch vehicles use unsymmetrical dimethylhydrazine (UDMH) as liquid fuel in the space program. UDMH is highly toxic and poses a serious threat to the environment and to humans. One of the most effective methods of UDMH neutralization in case of fuel spills is adsorption. This paper is the first to suggest using hydrolysis lignin as rocket fuel adsorbent. The research was based ...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1952
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.06-0055