Table 1.
Chemical composition of the 40–60 mesh from cork, phloem and xylem of Quercus suber L. Mean values of two samples.
| (% oven dry material) | Cork | Phloem | Xylem |
|---|---|---|---|
| Ash | 0.7 | 3.1 | 1.5 |
| Total extractives | 10.4 | 6.2 | 8.4 |
| Dichloromethane | 4.1 | 0.1 | 0.6 |
| Ethanol | 2.9 | 1.9 | 2.8 |
| Water | 3.4 | 4.2 | 5.0 |
| Total lignin | 27.1 | 38.4 | 23.6 |
| Klason lignin | 26.2 | 36.0 | 20.6 |
| Soluble lignin | 0.9 | 2.4 | 3.0 |
| Suberin | 30.1 | – | – |
| MONOSACCHARIDES | |||
| Arabinose | 2.0 | 0.9 | 0.6 |
| Xylose | 6.4 | 15.5 | 13.7 |
| Mannose | 0.4 | 0.1 | 0.6 |
| Galactose | 1.1 | 0.8 | 1.1 |
| Glucose | 9.0 | 16.5 | 28.7 |