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Official Journal of the Japan Wood Research Society

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Differential scanning calorimetric analysis of the lignin-carbohydrate complex degraded by wood-rotting fungi

Abstract

Differential scanning calorimetric (DSC) analysis was applied to the lignin-carbohydrate complex (LCC) fractions degraded by the wood-rotting fungiTyromyces palustris andCoriolus versicolor. Based on changes of the thermogram, it is assumed that the brown-rot fungusT. palustris split the hemicellulose fragment from the LCC during incubation. On the other hand, in the case of the white-rot fungusC. versicolor, the peak temperature of the LCC fraction became higher and then lower, indicating that this fungus first degraded the hemicellulose portion and then decomposed the lignin polymer. Furthermore, the appearance of a lignin-rich fraction was found in the fraction fromC. versicolor, which was not determined by gel-permeation chromatographic analysis. These results demonstrated that DSC analysis can be used to analyze the decay mechanism of solid lignocellulosic samples.

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Correspondence to Sho-ichi Tsujiyama.

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Tsujiyama, S. Differential scanning calorimetric analysis of the lignin-carbohydrate complex degraded by wood-rotting fungi. J Wood Sci 47, 497–501 (2001). https://doi.org/10.1007/BF00767905

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Key words

  • Coriolus versicolor
  • Differential scanning calorimetry
  • Lignin-carbohydrate complex
  • Tyromyces palustris