Table 3. Temporal change of relative abundances of functional groups (%) in wheat straw obtained by multiCP NMR technique under anaerobic and aerobic conditions.
| Incubation | 0–44 ppm | 44–64 ppm | 64–93 ppm | 93–113 ppm | 113–142 ppm | 142–162 ppm | 162–188 ppm | 188–220 ppm | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Time | Alkyl C | OCH3 | NCH | O-alkyl C | Anomeric C | Aromatic C-C | Aromatic C-O | COO/N-C = O | C = O | |||||||||
| (months) | Ana | Aer | Ana | Aer | Ana | Aer | Ana | Aer | Ana | Aer | Ana | Aer | Ana | Aer | Ana | Aer | Ana | Aer |
| 0 | 12.4 | 12.4 | 4.1 | 4.1 | 9.9 | 9.9 | 54.2 | 54.2 | 13.3 | 13.3 | 3.9 | 3.9 | 1.0 | 1.0 | 1.0 | 1.0 | 0 | 0 |
| 1 | 11.8 | 9.6 | 3.2 | 3.1 | 11.9 | 11.4 | 51.6 | 54.3 | 13.4 | 14.1 | 4.8 | 4.7 | 2.0 | 2.2 | 2.0 | 2.2 | 0 | 0 |
| 3 | 19.8 | 19.6 | 3.4 | 3.9 | 12.2 | 7.4 | 43.1 | 39.0 | 11.3 | 10.8 | 6.0 | 7.4 | 2.6 | 2.9 | 2.6 | 2.9 | 0 | 0 |
| 6 | 13.0 | 10.9 | 4.0 | 4.0 | 11.9 | 9.2 | 46.1 | 45.1 | 12.7 | 13.4 | 7.0 | 9.0 | 3.3 | 4.0 | 3.3 | 4.0 | 0 | 0.8 |
| 12 | 14.6 | 8.3 | 4.3 | 4.0 | 13.1 | 8.6 | 44.1 | 47.1 | 12.3 | 13.7 | 7.0 | 8.9 | 3.2 | 4.6 | 3.2 | 4.6 | 0 | 0.9 |
Note: Ana—anaerobic conditions; Aer—aerobic conditions.