Assertion: lignin's bond | /r/HasProperty | forsskåhl
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text: nm gave a response at 430 nm and vice versa, a behaviour that was either ascribed to a hydroquinone/quinone system, charge transfer complexes, quinone methides, or E/Z isomerisation of ring-conjugated double bonds (Forsskåhl and Janson 1991; Ek et al. 1992; Castellan et al.