Table 1.
Chemical composition of fractions of Scots pine a
|
Contents in % (w/w) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Fraction | Arabinan ± SD | Galactan ± SD | Glucan ± SD | Mannan ± SD | Xylan ± SD | Klason lignin ± SD | Acid soluble lignin ± SD | Total lignin ± SD | Extractives ± SD | Ash ± SD | Total b |
| Juvenile heartwood |
2.0 ± 0.1 |
3.1 ± 0.1 |
42.7 ± 3.9 |
11.8 ± 0.2 |
6.6 ± 0.1 |
27.9 ± 0.3 |
1.6 ± 0.1 |
29.5 ± 0.4 |
4.5 ± 0.5 |
0.2 ± 0.1 |
100 |
| Mature heartwood |
1.8 ± 0.1 |
3.0 ± 0.1 |
42.2 ± 5.2 |
12.1 ± 0.2 |
5.3 ± 0.1 |
27.7 ± 0.1 |
1.4 ± 0.1 |
29.1 ± 0.2 |
4.4 ± 0.6 |
0.2 ± 0.1 |
98 |
| Juvenile sapwood |
1.9 ± 0.1 |
2.8 ± 0.2 |
39.7 ± 0.1 |
10.5 ± 0.3 |
6.2 ± 0.3 |
25.8 ± 0.4 |
1.7 ± 0.1 |
27.4 ± 0.5 |
3.0 ± 0.2 |
0.3 ± 0.1 |
92 |
| Mature sapwood |
1.7 ± 0.1 |
2.3 ± 0.1 |
41.8 ± 1.6 |
14.0 ± 0.2 |
5.5 ± 0.1 |
26.9 ± 0.2 |
1.5 ± 0.1 |
28.4 ± 0.2 |
2.9 ± 0.1 |
0.2 ± 0.1 |
97 |
| Bark |
2.4 ± 0.2 |
2.8 ± 0.2 |
41.8 ± 2.0 |
11.7 ± 0.3 |
5.4 ± 0.1 |
28.2 ± 0.3 |
1.9 ± 0.1 |
30.0 ± 0.3 |
3.5 ± 0.2 |
0.9 ± 0.3 |
99 |
| Top parts |
2.0 ± 0.1 |
3.4 ± 0.1 |
41.4 ± 1.4 |
11.4 ± 0.1 |
6.6 ± 0.1 |
28.1 ± 0.2 |
1.6 ± 0.1 |
29.7 ± 0.2 |
3.3 ± 0.6 |
0.3 ± 0.1 |
98 |
| Knotwood | 2.2 ± 0.1 | 4.1 ± 0.3 | 38.2 ± 1.4 | 11.9 ± 0.1 | 6.6 ± 0.1 | 30.0 ± 0.3 | 1.6 ± 0.1 | 31.5 ± 0.3 | 9.2 ± 0.3 | 0.3 ± 0.1 | 105 |
aYield in g 100 g-1 wood/bark. Mean values and standard deviations based on three replicates.
bIncludes arabinan, galactan, glucan, mannan, xylan, total lignin, extractives, and ash.