Official Journal of the Japan Wood Research Society
Table 1 Relative percentage contents of the major chemical components in larch lumber before and after combined treatment and hot air heat treatment
Major chemical components in larch lumber | Combined treatment | Hot air heat treatment | ||
|---|---|---|---|---|
Before treatment (%) | After treatment (%) | Before treatment (%) | After treatment (%) | |
Glucan | 37.5 | 34.9 | 33.8 | 34.3 |
Arabinan | 2.1 | 0.0 | 2.7 | 0.2 |
Galactan | 10.9 | 0.3 | 17.0 | 2.3 |
Xylan | 3.6 | 1.2 | 3.5 | 1.2 |
Mannan | 11.8 | 3.9 | 9.9 | 4.3 |
Klason lignin | 28.8 | 55.6 | 28.4 | 54.1 |
Acid soluble lignin | 0.4 | 0.3 | 0.3 | 0.4 |
Extractives | 4.9 | 3.8 | 4.4 | 3.2 |