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Table 3 Crystalline and amorphous cellulose contents (measured by XRD) of samples obtained using various ammonia treatment conditions and aqueous NaOH treatment

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

Cellulose samples Treatment conditions Amorphous content (%) Cellulose allomorphs (CI, %) Crystallite size (Å) Cellulose conversion (%)
     I II IIII   16 h 24 h
Avicel Control 26 74 - - 46 39 46
  NaOH 25°C 47 - 53 - 37 66 76
  NH3 25°C 46 - - 54 38 49 59
   130°C 26 - - 74 55 36 49
α-cellulose Control 42 58 - - 40 41 48
  NaOH 25°C 51 - 49 - 33 65 77
  NH3 25°C 45 - - 55 45 51 62
   130°C 36 - - 64 55 43 56
Cotton linters Control 27 73 - - 55 36 41
  NaOH 25°C 56 - 44 - 40 67 78
  NH3 25°C 48 - - 52 57 43 52
   130°C 24 - - 76 68 42 53
Corn stover Control 50 50 - - 30 78 86
  NaOH 25°C 56 - 44 - 34 79 87
  NH3 25°C 49 - - 51 54 76 85
   130°C 32 - - 68 56 55 67
  1. CI: crystallinity index; XRD: X-ray diffraction.