Official Journal of the Japan Wood Research Society
Table 4 Chemical composition (% o.d. material) of the cork of Quercus variabilis and, for comparison, of that of Quercus suber [8]
From: Cellular structure and chemical composition of cork from the Chinese cork oak (Quercus variabilis)
Q. variabilis | Q. suber | |
|---|---|---|
Ash | 1.1 | 1.2 |
Extractives | ||
Total | 9.6 | 14.2 |
Dichloromethane | 4.9 | 5.4 |
Ethanol | 2.7 | 4.8 |
Water | 2.0 | 4.0 |
Suberin | 39.2 | 39.4 |
Lignin | ||
Total | 22.2 | |
Klason lignin | 21.8 | 23.0 |
Soluble lignin | 0.4 | |
1 % NaOH | 53.3 |