| Raw maize stem | 20-min HWP | 40-min HWP | |||
---|---|---|---|---|---|---|
M7 | M9 | M7 | M9 | M7 | M9 | |
Pretreatment severity | – | – | 3.66 | 3.66 | 3.96 | 3.96 |
Yield of HWP (g g−1 CWR) | - | – | 0.797 (± 0.022) | 0.796 (± 0.034) | 0.629 (± 0.027) | 0.636 (± 0.033) |
Hydrolysate pH | – | – | 4.4 (± 0.06) | 4.4 (± 0.08) | 3.8 (± 0.01) | 3.8 (± 0.06) |
Composition | ||||||
 Polysaccharides (g 100 g−1 CWR) | 60.2 (± 0.7) | 67.3 (± 1.5) | 65.7 (± 1.9) | 62.1 (± 4.4) | 65.1 (± 2.6) | 64.0 (± 0.3) |
 Cellulose (g.100 g−1 of sugars) | 67.7 (± 0.1) | 62.1 (± 0.4) | 58.4 (± 0.1) | 62.4 (± 0.3) | 76.7 (± 0.3) | 69.2 (± 0.8) |
 Hemicelluloses (g.100 g−1 of sugars) | 32.3 (± 0.1) | 37.9 (± 0.4) | 41.6 (± 0.1) | 37.6 (± 0.3) | 23.3 (± 0.3) | 30.8 (± 0.8) |
 Klason lignin (g.100 g−1 CWR) | 16.3 (± 0.1) | 18.6 (± 0.4) | 18.7 (± 0.2) | 20.1 (± 0.3) | 25.3 (± 1.3) | 27.3 (± 0.2) |
Loss/solubilization after HWPa | ||||||
 Cellulose (%) | – | – | 25.3 (± 1.5) | 23.9 (± 5.3) | 23.1 (± 1.0) | 30.6 (± 0.8) |
 Hemicelluloses (%) | – | – | 13.4 (± 3.2) | 19.6 (± 4.2) | 50.5 (± 3.4) | 45.7 (± 1.1) |
 Klason lignin (%) | – | – | 8.7 (± 1.0) | 11.8 (± 1.1) | 3 (± 0.4) | 6.6 (± 0.7) |