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Table 3 Quantitative analysis of the lignin fractions by integration of 2D HSQC NMR spectra (results expressed per 100 Ar)

From: Stimulation and inhibition of enzymatic hydrolysis by organosolv lignins as determined by zeta potential and hydrophobicity

Samples S/G β-O-4 (A) β-O-4 (A′) β–β β-5 α-O-4/β-O-4 PB (%)
Cottonwood 1.56 1.0 14.0 6.9 3.3 ND 6.3
Black willow 2.69 3.0 10.3 7.8 1.8 ND 2.0
Aspen 2.35 0.8 9.5 4.9 1.4 3.6 8.8
Eucalyptus 4.91 0.8 12.2 10.1 1.5 ND ND
Loblolly pine ND 2.8 9.2 2.9 8.5 ND ND
  1. ND not detectable, PB p-hydroxybenzoate