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| PDF : |  08010032.pdf |
| title(En) : | Chemical Studies on Decayed Wood as a Raw Material for Pulp. III. Chemical Changes of Wood Carbohydrates during Decay. |
| author(En) : | Tsutomu Kayama |
| information : | Mokuzai Gakkaishi 8(1), 32-37 (1962) |
| assort : | Original Article |
| summary(En) : | The composition analyses of carbohydrates of decayed pine wood revealed that the difference of decomposed glucan between brown rotted wood and white rotted wood, in the same weight loss, was not remarkable in percentages. However, it has been described in the first report of this series that the α-cellulose of wood was very rapidly reduced during decay caused by brown rotting fungus. Therefore, the author presumed that both the brown rotting fungus (Poria vaporaria) and the white rotting fungus (Peniophora gigantea) utilized the glucan of the samples in approximately the same degree, but the brown rotting fungus produced rapidly low molecular fractions of carbohydrates in the process of decomposition of wood. The hemicellulose fractions of decayed pine wood, including mannan, xylan, araban, etc., were decomposed faster than glucan (including cellulose). In the white rotted beech wood caused by Coriolus versicolor, the glucan and the xylan, which were major components of carbohydrates, decreased uniformly during decay. |