J. Buchert, A. Mustranta, T. Tamminen, P. Spetz, B. Holmbom
Modification of Spruce Lignans with
Trametes hirsuta Laccase
Summary
The effect of Trametes hirsuta laccase on isolated spruce wood lignans was evaluated. Lignans
were isolated from the heartwood of spruce branches and treated with different laccase dosages
and treatment times. The effect of the treatment was monitored by gas chromatography, size exclusion
chromatography and ionization difference UV spectroscopy. Lignans were efficiently oxidized
by T. hirsuta laccase. About half of the phenolic groups present in lignans remained intact
during the treatment. The oxidation of phenolic groups in lignans produced oligomeric structures
containing approximately 4–5 lignan units (i.e., 8–10 phenyl propane units). Precipitation of the
formed oligomeric structures probably prevented further polymerization.
Holzforschung, Walter de Gruyter
Print ISSN: 0018-3830
Volume: 56, 11/2002
Pages: 579 - 584
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