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Official Journal of the Japan Wood Research Society

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Table 1 Lignin content, phenolic acid content, and alkaline nitrobenzene oxidation yields from five different lignocellulosics

From: Characterization of lignin-derived products from various lignocellulosics as treated by semi-flow hot-compressed water

Lignocellulosic Lignin content (wt%) Phenolic acids (wt%) Nitrobenzene oxidation yieldsa (molar ratio to vanillin)
Ferulic acid p-Coumaric acid p-Hydroxybenzoic acid VA SA HA
Jpn. cedar 32.0 1 0 0.05
Jpn. beech 24.0 1 2.19 0
Nipa frond 19.6 0.13 0.03 0.78 1 2.15 0.10
Rice straw 20.2 0.55 0.79 1 0.67 0.41
Corn cob 18.0 0.77 1.50 1 0.80 0.79
  1. VA vanillin, SA syringaldehyde, HA p-hydroxybenzaldehyde
  2. aLignin in monocotyledons contained cinnamic acids such as ferulic and p-couamric acids, and they can be converted into VA and HA, respectively. Thus, the cinnamic acids-derived oxidation yields were subtracted from the original oxidation yields to obtained lignin-derived oxidation yields. The amount of ferulic acid-derived VA (mg) is assumed by 0.317 × ferulic acid content in biomass (mg), and the amount of p-coumaric acid-derived HA is assumed by 0.321 × p-coumaric acid content in biomass (mg)