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

Table 4.

Sugar yields after enzymatic hydrolysis a

 
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.

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).