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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.