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Figure 4 | Sustainable Chemical Processes

Figure 4

From: Unraveling the structural characteristics of lignin in hydrothermal pretreated fibers and manufactured binderless boards from Eucalyptus grandis

Figure 4

Main substructures present. A, β-aryl ether structure formed by β-O-4′ linkages; B, resinol including β-β’ linkages; C, phenylcoumaran including β-5′ linkages; F, p-hydroxycinnamyl alcohol end groups; G, Guaiacyl unit; S, Syringyl unit; S’, Oxidized syringyl units bearing a carboxyl group at Cα.

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