Table 3 The component coefficients of glucose yield-relevant factors according to the PCA
Glucose yield | Poplar | Wheat straw | ||
|---|---|---|---|---|
Component | Component | |||
1 | 2 | 1 | 2 | |
S′ + G′ | − 2.06 | − 0.03 | − 1.25 | 0.09 |
Cα-oxidized products | − 1.97 | 0.00 | − 1.22 | 0.08 |
β-O-4 | − 1.94 | − 0.12 | − 0.97 | 0.01 |
Condensation degree | − 1.91 | − 0.19 | − 1.24 | 0.01 |
FA | − | − | − 1.22 | 0.00 |
Hemicellulose content | − 1.76 | − 0.07 | − 0.88 | 0.02 |
Lignin content | − 1.61 | − 0.11 | − 1.01 | 0.00 |
Cellulose content | − 0.87 | 0.11 | − 0.31 | 0.06 |
S/G ratio (Py-GC/MS) | 1.93 | − 0.23 | 0.71 | − 0.28 |
Ph-C1-2/ph-C3 | 1.85 | 1.30 | 2.84 | 0.97 |
S/G ratio (NMR) | 3.97 | − 0.24 | 2.12 | − 0.28 |
L/C | 4.36 | − 0.42 | 2.44 | − 0.69 |