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. 2014 Mar 19;14:20. doi: 10.1186/1472-6750-14-20

Table 3.

Sugar yields in pretreatment liquids a

 
 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.

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.

bNot detected: yield <0.001 g sugar 100 g-1 wood (values under the lowest standard, 0.5 ppm, in the calibration curve).