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Lignin model compound

Chemistry ofDelig niiic tion. The chemistry of delignification is complex and, despite the extensive Hterature, not completely understood. A variety of lignin model compounds have been studied and the results compared with the observed behavior of lignin during pulping (1,10—12,16). [Pg.261]

Habu N, M Samejima, T Yoshimoto (1989a) A novel dioxygenase responsible for the Ca-Cp cleavage of lignin model compounds from Pseudomonas sp. TMY1009. Mokuzai Gakkaishi 35 26-29. [Pg.395]

Kondo R, H Yamagami, K Sakai (1993) Xylosation of phenolic hydroxyl groups of the monomeric lignin model compounds 4-methylgnaiacol and vanillyl alcohol by Coriolus versicolor. Appl Environ Microbiol 59 438-441. [Pg.421]

Quideau, S. Ralph, J. A biomimetic route to lignin model compounds via silver(I) oxide oxidation. 1. Synthesis of dilignols and non-cyclic benzyl aryl ethers. Holzforschung 1994, 48, 12-22. [Pg.416]

Ralph, J. Helm, R. F. Rapid proton NMR method for determination of threo.erythro ratios in lignin model compounds and examination of reduction stereochemistry. J. Agric. Food Chem. 1991, 39, 705-709. [Pg.417]

Brunow, G. Ronnberg, M. The peroxidatic oxidation of some phenolic lignin model compounds. Acta Chem. Scand., Ser. B 1979, 33, 22-26. [Pg.418]

Hydrogenolysis of Lignin Model Compounds Using In-Situ, Water-Soluble Ru/P(CH2OH)3... [Pg.135]

Bourbonnais R, Leech D, Paice MG (1998) Electrochemical analysis of the interaction of laccase with lignin model compounds. Biochim Biophys Acta 1379 381-390... [Pg.100]

Caldwell, E.S. and Steelink, C. (1969). Phenoxy radical intermediates in the enzymatic degradation of lignin model compounds. Biochimica et Biophysica Acta, 184,420-431. [Pg.204]

The second ligninolytic enzyme, MnP, has been identified (U), purified and characterized (13-16). MnP is an H O -dependent heme glycoprotein (M -46,000) with an iron protoporphyrin iX prosthetic group. MnP catalyzes the Mn -dependent oxidation of a variety of phenols and phenolic lignin model compounds (6,8.13-15,17). Electronic absorption... [Pg.189]

Degradation Mechanism of Lignin Model Compounds by Laccase m (16,17)... [Pg.216]

Bourbonnais, R. Paice, M.G. Freiermuth, B. Bodie, E. Bomeman, S. Reactivities of various mediators and laccases with Kraft pulp and lignin model compounds. Appl. Environ. Microbiol. 1997, 63, 4627-4632. [Pg.498]

Studies of pathogenic fungi suggested an explanation for the absence of inducer molecules in host root exudate. Quinones such as 2,6-DMBQ have been shown to be released by white rot fungi as terminal oxidation products of lignin model compounds (38). These findings substantiated previous reports (39-41) that laccases, phenol oxidases using 0 as the oxidant, are directly involved in... [Pg.557]

At this point, it must be emphasized that, based on previous structural analysis of isolated lignins (27), appropriate lignin model compounds and synthetic dehydrogenatively polymerized (DHP) lignin preparations (28-... [Pg.171]

Side-Chain Cleavage Reactions of 0-1 and fl-O-4 Lignin Model Compounds Catalyzed by Lignin Peroxidase. [Pg.483]

A redox stable, water-soluble iron porphyrin has been used as a model ligninase. The reactions of lignin model compounds catalyzed by this biomimetic system were found to be dependent on pH and the solvent being used. [Pg.519]

Model studies showed that veratryl alcohol could mediate the oxidation of a polymeric lignin model compound under certain conditions but could not mediate the oxidation of small molecule model compounds. [Pg.519]

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