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Table 4 Comparison of crystallinity index measured by XRD and NMR for cellulose samples obtained using aqueous NaOH and liquid ammonia treatments

From: Effects of alkaline or liquid-ammonia treatment on crystalline cellulose: changes in crystalline structure and effects on enzymatic digestibility

Cellulose samples Treatment conditions Crystallinity index (%)
    XRD NMR
Avicel Control 74 84
  NaOH 25°C 53 74
  NH3 25°C 54 54
   130°C 74 67
α-cellulose Control 58 66
  NaOH 25°C 49 66
  NH3 25°C 55 53
   130°C 64 63
Cotton linters Control 73 82
  NaOH 25°C 44 66
  NH3 25°C 52 62
   130°C 76 75
Corn stover Control 50 65
  NaOH 25°C 44 60
  NH3 25°C 51 50
   130°C 68 69
  1. NMR: nuclear magnetic resonance; XRD: X-ray diffraction.