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Table 4 Comparison of total glucose (T-glucose) using HPLC with G-glucose from enzymatic hydrolysis (as % of starting raw material) for four Salix clones at different stem heights together with % tension wood at different stem heights

From: The contribution of G-layer glucose in Salix clones for biofuels: comparative enzymatic and HPLC analysis of stem cross sections

Salix

Stem height (cm)

T-glucose

G-glucose

Theoretical CW-glucose

Theoretical CW-glucose

HPLC measured

CW-glucose

Tension area (%)

Stem diameter (cm)

Tension volume (%)

% raw material

% enzymatic hydrolyzed material

Tora

350

53.1

14.7

38.4

45.1

45.3

38.9

1.4

24.2

 

250

49.9

9.6

40.3

44.5

44.9

36.2

1.8

 

150

46.6

7.5

39.1

42.3

40.6

23.6

2.2

 

50

41.3

3.7

37.6

39.0

36.9

9.7

2.6

 

Mean

47.7

8.9

38.9

42.7

41.9

   

Björn

330

56.4

13.4

43.0

49.6

49.8

33.9

1.6

28.2

 

250

52.5

12.4

40.1

45.7

51.2

38.7

1.8

 

150

51.7

10.8

40.9

45.8

47.8

25.3

2.2

 

50

50.7

9.5

41.2

45.5

47.5

21.7

2.7

 

Mean

52.8

11.5

41.3

46.7

49.1

   

Jorr

200

47.1

9.4

37.7

41.7

41.1

20.8

1.4

15.5

 

150

45.6

8.0

37.6

40.9

42.8

14.1

1.5

 

100

46.5

7.6

38.9

42.1

42.8

11.0

1.7

 

50

49.1

9.2

39.9

43.9

41.7

21.8

1.8

 

Mean

47.1

8.6

38.5

42.2

42.1

   

Loden

280

49.1

11.8

37.3

42.3

44.7

34.9

1.1

14.0

 

210

49.1

5.3

43.8

46.2

49.1

16.6

1.2

 

130

49.4

5.1

44.3

46.7

46.1

13.8

1.5

 

50

49.2

4.0

45.2

47.1

45.9

5.8

1.9

 

Mean

49.2

6.6

42.7

45.6

46.5

   

Field Salix

48.0

11.9

36.1

41.0

41.6

   
  1. T-glucose: total glucose; G-glucose: tension wood glucose; CW-glucose: cell wall structural glucose