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Table 2 Phenolic acids released from sugar cane after 72 h hydrolysis

From: Effects of enzymatic removal of plant cell wall acylation (acetylation, p-coumaroylation, and feruloylation) on accessibility of cellulose and xylan in natural (non-pretreated) sugar cane fractions

Fraction Enzyme mix RC   H58  
pCA FA pCA FA
% of pCA ester % of FA ester % of pCA ester % of FA ester
Pith Background (substrate only) 0.1 <0.1 <0.1 <0.1
  C-X 1.5 ± 0.0 1.0 ± 0.3 1.0 ± 0.3 1.5 ± 1.1
  C-X-AnFaeA 1.4 ± 0.3 18.3 ± 0.8 1.0 ± 0.0 46.8 ± 11.9
  C-X-TsFaeC 6.7 ± 0.4 20.9 ± 0.7 5.5 ± 0.5 48.6 ± 9.9
  C-X-NcFaeD 1.5 ± 0.1 2.2 ± 0.5 1.1 ± 0.2 7.0 ± 4.8
Interface Background (substrate only) 0.3 <0.1 0.3 <0.1
  C-X 1.9 ± 0.2 0.1 ± 0.2 1.6 ± 0.3 1.7 ± 0.7
  C-X-AnFaeA 1.6 ± 0.1 9.7 ± 0.4 1.8 ± 0.2 34.3 ± 4.2
  C-X-TsFaeC 8.8 ± 0.1 13.4 ± 0.1 8.7 ± 0.4 34.0 ± 3.6
  C-X-NcFaeD 2.0 ± 0.1 1.9 ± 0.2 1.7 ± 0.1 4.1 ± 0.5
  1. The release of phenolic acids (ferulic acid, FA, and p-coumaric acid, pCA) is expressed as percentage of phenolic acids in ester form, as the hydrolysis conditions are too mild to cleave ether linkages. The values significantly different from the amount released by the C-X mixture are marked in bold (t-test; P < 0.01).