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Table 4 Sugar yields after enzymatic hydrolysis a

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

  Untreated
Fraction Arabinose Galactose Glucose Mannose Xylose
Juvenile heartwood 0.2 ± 0.1 0.4 ± 0.1 3.0 ± 0.3 0.7 ± 0.1 0.3 ± 0.1
Mature heartwood 0.2 ± 0.1 0.4 ± 0.1 3.3 ± 0.3 0.8 ± 0.1 0.3 ± 0.1
Juvenile sapwood 0.5 ± 0.1 0.7 ± 0.1 4.1 ± 0.2 0.9 ± 0.2 0.4 ± 0.2
Mature sapwood 0.2 ± 0.2 0.4 ± 0.2 3.3 ± 0.1 0.9 ± 0.2 0.3 ± 0.2
Bark 0.2 ± 0.1 0.4 ± 0.1 6.4 ± 0.6 0.8 ± 0.1 0.3 ± 0.1
Top parts 0.2 ± 0.1 0.4 ± 0.1 3.0 ± 0.3 0.7 ± 0.1 0.3 ± 0.1
Knotwood 0.2 ± 0.1 0.4 ± 0.1 3.3 ± 0.3 0.8 ± 0.1 0.3 ± 0.1
  Pretreatment severity: mild
Fraction Arabinose Galactose Glucose Mannose Xylose
Juvenile heartwood n.d.b 0.58 ± 0.1 6.9 ± 2.6 0.7 ± 0.1 n.d.
Mature heartwood n.d. 0.62 ± 0.1 8.4 ± 1.3 0.8 ± 0.1 n.d.
Juvenile sapwood n.d. 0.65 ± 0.1 8.5 ± 1.0 0.8 ± 0.1 n.d.
Mature sapwood n.d. 0.64 ± 0.1 10.6 ± 0.7 0.9 ± 0.2 n.d.
Bark n.d. 0.63 ± 0.1 8.1 ± 1.3 0.8 ± 0.1 n.d.
Top parts n.d. 0.62 ± 0.1 10.5 ± 2.3 0.8 ± 0.1 n.d.
Knotwood n.d. 0.61 ± 0.1 10.6 ± 2.4 0.8 ± 0.1 n.d.
  Pretreatment severity: medium
Fraction Arabinose Galactose Glucose Mannose Xylose
Juvenile heartwood n.d. n.d. 10.1 ± 1.8 n.d. n.d.
Mature heartwood n.d. n.d. 8.3 ± 0.7 n.d. n.d.
Juvenile sapwood n.d. n.d. 12.3 ± 1.0 n.d. n.d.
Mature sapwood n.d. n.d. 12.1 ± 2.4 n.d. n.d.
Bark n.d. n.d. 7.5 ± 0.9 n.d. n.d.
Top parts n.d. n.d. 9.2 ± 2.2 n.d. n.d.
Knotwood n.d. n.d. 10.5 ± 1.4 n.d. n.d.
  Pretreatment severity: severe
Fraction Arabinose Galactose Glucose Mannose Xylose
Juvenile heartwood n.d. n.d. 18.0 ± 1.4 n.d. n.d.
Mature heartwood n.d. n.d. 15.8 ± 2.3 n.d. n.d.
Juvenile sapwood n.d. n.d. 17.9 ± 2.5 n.d. n.d.
Mature sapwood n.d. n.d. 14.6 ± 3.0 n.d. n.d.
Bark n.d. n.d. 14.7 ± 0.3 n.d. n.d.
Top parts n.d. n.d. 15.9 ± 2.0 n.d. n.d.
Knotwood n.d. n.d. 16.6 ± 0.5 n.d. 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).