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Table 1 Chemical composition of fractions of Scots pine a

From: Analysis, pretreatment and enzymatic saccharification of different fractions of Scots pine

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

  1. aYield in g 100 g-1 wood/bark. Mean values and standard deviations based on three replicates.
  2. bIncludes arabinan, galactan, glucan, mannan, xylan, total lignin, extractives, and ash.