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Table 1 Compositional and X-ray data for as-received and hydrothermally processed wheat straw and eucalyptus pulp, and partially enzyme digested materials

From: Structural reorganisation of cellulose fibrils in hydrothermally deconstructed lignocellulosic biomass and relationships with enzyme digestibility

Material Process conditions Compositional data (stem + leaf) Powder WAXD data Fibre WAXD data (stem internode)
  hydrothermal reactor temperature (°C) weight loss (wt-%) glucan (wt-%) xylan (wt-%) measured crystallinity (%) fibril crystallinity (%) crystal width (200) (nm) crystal length (004) (nm) disorientation
(004) (FWHH°) (200) (FWHH°) narrow broad
Wheat straw as received 0 39.0 23.0 24.5 63 2.8 12.1 15.5 17.5 71
  155 10 43.5 24.2 29.2 67 3.0     
  180 14 47.4 24.1 28.6 60 3.2 11.8 14.7 19.6 108
  190 32 56.5 13.8 31.7 56 3.3     
  200 40 60.0 1.8 26.1 44 3.4 11.6 15.0 20.0 112
Eucalyptus pulp as-received 0 96.0 4.0 63.6 66 3.6     
  180 4 96.5 1.2 67.7 70 4.2     
  195 4 97.0 1.1 71.8 74 4.4     
  200 4 96.9 1.1 72.0 74 4.6     
  time of enzyme hydrolysis (hours) glucose yield + (%) remaining glucan (wt-%)   measured crystallinity (%) fibril crystallinity (%) crystal width (200) (nm)     
Hydrothermally processed wheat straw (190oC)* 0 0 59.0   35.4 56 3.3     
6 43 45.1   28.3 58 3.4     
As-received eucalyptus pulp* 0 0 96.0   60.0 69 3.6     
  6 30 97.0   60.5 68 3.6     
  1. * separate experimental set; + from enzyme digestion, as proportion of yield from acid total hydrolysis.