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Table 3 Sugar yields in pretreatment liquids a

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

  Pretreatment severity: mild
Fraction Arabinose Galactose Glucose Mannose Xylose
Juvenile heartwood 0.1 ± 0.0 0.5 ± 0.1 3.7 ± 0.4 1.3 ± 0.3 0.1 ± 0.0
Mature heartwood 0.1 ± 0.0 0.4 ± 0.1 3.3 ± 0.3 1.3 ± 0.4 0.1 ± 0.0
Juvenile sapwood 0.1 ± 0.0 0.5 ± 0.1 3.8 ± 0.2 1.4 ± 0.3 0.1 ± 0.1
Mature sapwood 0.2 ± 0.1 0.4 ± 0.1 4.0 ± 0.3 1.9 ± 0.2 0.1 ± 0.0
Bark 0.3 ± 0.1 0.6 ± 0.1 3.9 ± 0.5 1.7 ± 0.5 0.1 ± 0.0
Top parts 0.2 ± 0.1 0.8 ± 0.1 3.5 ± 0.3 1.7 ± 0.2 0.2 ± 0.3
Knotwood 0.2 ± 0.1 1.0 ± 0.2 3.4 ± 0.3 1.6 ± 0.4 0.1 ± 0.0
  Pretreatment severity: medium
Fraction Arabinose Galactose Glucose Mannose Xylose
Juvenile heartwood 0.5 ± 0.1 1.8 ± 0.3 13.0 ± 1.0 4.8 ± 0.6 0.8 ± 0.1
Mature heartwood n.d.b 0.8 ± 0.5 9.7 ± 1.2 2.6 ± 1.7 n.d.
Juvenile sapwood 0.6 ± 0.1 1.5 ± 0.1 13.3 ± 1.9 5.2 ± 0.2 0.9 ± 0.1
Mature sapwood 0.4 ± 0.1 0.8 ± 0.4 8.8 ± 2.5 3.9 ± 1.5 0.5 ± 0.2
Bark 0.9 ± 0.2 1.3 ± 0.3 13.7 ± 1.7 4.1 ± 0.9 0.6 ± 0.3
Top parts 0.6 ± 0.2 2.1 ± 0.6 12.1 ± 3.4 4.8 ± 1.2 0.8 ± 0.3
Knotwood 0.7 ± 0.1 2.5 ± 0.1 11.2 ± 1.0 5.3 ± 0.2 0.9 ± 0.1
  Pretreatment severity: severe
Fraction Arabinose Galactose Glucose Mannose Xylose
Juvenile heartwood 0.3 ± 0.1 1.0 ± 0.1 15.9 ± 2.0 1.9 ± 0.4 n.d.
Mature heartwood n.d. 0.5 ± 0.2 9.4 ± 1.9 0.9 ± 0.5 n.d.
Juvenile sapwood 0.2 ± 0.1 0.6 ± 0.1 10.9 ± 1.6 n.d. n.d.
Mature sapwood n.d. 0.5 ± 0.1 8.9 ± 2.4 1.3 ± 0.3 n.d.
Bark 0.3 ± 0.1 0.5 ± 0.1 9.8 ± 0.7 0.5 ± 0.1 n.d.
Top parts n.d. 0.8 ± 0.3 10.2 ± 1.7 0.8 ± 0.4 n.d.
Knotwood 0.4 ± 0.1 1.3 ± 0.3 13.1 ± 1.7 1.9 ± 0.6 n.d.
  1. aYield in g sugar 100 g-1 wood (dry weight) in samples taken after 72 h and analyzed using HPAEC. Mean values and standard deviations based on three replicates.
  2. bNot detected: yield <0.001 g sugar 100 g-1 wood (values under the lowest standard, 0.5 ppm, in the calibration curve).