Fig. 6From: Comprehensive evaluation of the liquid fraction during the hydrothermal treatment of rapeseed straw2D-HSQC NMR spectra of the degraded lignin fractions in aromatic region (a). Common structures found in the degraded fractions to aid the interpretation of the spectra (b, G, guaiacyl units; S, syringyl units; S′, oxidized syringyl units with a Cα ketone)Back to article page