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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