| Samples | Crystallinity indexa (%) | Crystallinity indexb (%) |
| Maize stalk | 24 | 32 |
| Pulverized | 22 | 25 |
| NaOH treated | 30 | 42 |
| NaClO2 treated | 58 | 67 |
| KOH treated | 73 | 85 |