Reaction of osmium tetroxide with a diphenolic compound as a model substance for demethylated lignin

IRG/WP 1303

K Messner, E Srebotnik

By using caffeic acid as a model substance for diphenolic moieties of demethylated lignin it was found that electron dense particles called by the authors "osmiophilic particles" in former papers are reaction products of OsO4 with the model substance. By these products it is possible to indicate the enzymatic demethylation of lignin taking place during wood decay. The appearance of the electron dense particles in decay patterns described in earlier papers is briefly summarized.


Keywords: ENZYMATIC DEMETHYLATION; LIGNIN; CAFFEIC ACID; OSMIOPHILIC PARTICLES; FUNGI; DECAY; OSMIUM TETRAOXIDE; MORPHOLOGICAL PATTERNS

Conference: 86-05-26/30 Avignon, France


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