Table 1. Main compounds and relative composition of stemwood and knotwood acetone extracts.
| Fatty Acids | Gallic Acids | Resin Acids | Sugars | Others | Unidentifie Flavonoids | Catechin | Taxifolin | Sakuranin | Naringenin | Dihydrochrysin | Others Lignans | Secoisolariciresinol | Matairesinol | Unidentified | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beech heartwood | 6.3 | 93.7 | |||||||||||||
| Beech sapwood | 29.9 | 16.9 | 53.2 | ||||||||||||
| Beech mixed knots b | 73.4 | 0.7 | 2.0 | 23.9 | |||||||||||
| Beech mixed knots b global a | 11.2 | 63.3 | 5.2 | 20.3 | |||||||||||
| Cherry heartwood | 4.9 | 18.8 | 24.3 | 29 | 23.0 | ||||||||||
| Cherry heartwood global a | 2.7 | 1.8 | 4.0 | 22.7 | 2.9 | 12.5 | 40.7 | 12.7 | |||||||
| Cherry sapwood | 5.7 | 8.5 | 12.1 | 51.8 | 21.9 | ||||||||||
| Cherry mixed knots b | 8.3 | 26.6 | 47.5 | 17.6 | |||||||||||
| Cherry mixed knots b global a | 6.6 | 0.2 | 30.7 | 33.6 | 28.9 | ||||||||||
| Chestnut heartwood | 60.5 | 24.7 | 6.4 | 1.6 | 6.8 | ||||||||||
| Chestnut sapwood | 0.8 | 94.3 | 4.3 | 0.6 | |||||||||||
| Chestnut dead knots | 20.8 | 79.2 | |||||||||||||
| Chestnut living knots | 56.3 | 43.7 | |||||||||||||
| E.oak heartwood | 83.9 | 13.2 | 2.9 | ||||||||||||
| E.oak sapwood | 97.1 | 2.9 | |||||||||||||
| E.oak dead knots | 6.9 | 10.5 | 16.1 | 5.6 | 52 | 8.9 | |||||||||
| E.oak living knots | 74.4 | 24.2 | 1.4 | ||||||||||||
| Larch heartwood | 4.5 | 37.6 | 57.9 | ||||||||||||
| Larch heartwood global a | 1.3 | 15.5 | 5.3 | 1.2 | 60.9 | 15.8 | |||||||||
| Larch sapwood | 14.4 | 59.3 | 6.6 | 19.7 | |||||||||||
| Larch mixed knots b | 4.0 | 1.2 | 4.2 | 45.3 | 14 | 22.5 | 8.8 | ||||||||
| Larch mixed knots b global a | 7.7 | 38 | 5.4 | 30.3 | 11 | 7.6 | |||||||||
| Walnut heartwood | 2.9 | 55.2 | 22.5 | 19.4 | |||||||||||
| Walnut sapwood | 90.1 | 9.9 | |||||||||||||
| Walnut living knots | 96.4 | 2.3 | 1.3 |
a Global means.
b Mixed knots means that living and dead knots were mixed when ground and extracted