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Table 3 Phenolic acid composition (μg/mg) of wheat bran before (in AIRs) and after alkaline sequential extraction

From: Characterization of cell wall components of wheat bran following hydrothermal pretreatment and fractionation

  p -coumaric acid Ferulic acid 8,5′-DiFA 5,5′-DiFA 8- O -4′-DiFA
Ctrl AIR 2.6 ± 0.5 9.7 ± 0.4 0.9 ± 0.1 0.9 ± 0.2 1.0 ± 0.4
190°C AIR 1.0 ± 0.2 3.6 ± 0.4 0.3 ± 0.1 0.5 ± 0.1 0.7 ± 0.0
200°C AIR 0.8 ± 0.2 2.7 ± 0.3 0.2 ± 0.4 0.2 ± 0.0 0.4 ± 0.0
Ctrl residue 0.4 ± 0.1 0.5 ± 0.1 nd nd nd
190°C residue 0.2 ± 0.0 0.5 ± 0.1 nd nd nd
200°C residue 0.1 ± 0.0 0.2 ± 0.0 nd nd nd
  1. Values are expressed as means of duplicate analysis ± SD.
  2. nd none detected.