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Table 2 Abundance of major lignin inter-unit linkages and S/G for birch samples

From: Microbial biogas production from hydrolysis lignin: insight into lignin structural changes

Materials Amounts per 100Ar (%) Weight (%) S/G
β-O-4′ β–β β-5 BE S G
MWL of untreated birch 66.9 13.3 2.6 BDa 74.0 26.0 2.8
HL birch 18.6 11.0 4.9 3.9 85.0 15.0 5.8
HL birch after AD 23.5 9.6 1.0 BD 72.0 28.0 2.6
  1. aBD means below detection limit