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. 2017 Feb 7;10:36. doi: 10.1186/s13068-017-0718-z

Fig. 5.

Fig. 5

Phenolic monomers composition (mg/g lignin) of a Miscanthus × giganteus; b poplar and c wheat straw samples without pretreatment and pretreated with increasing severity: red 4-hydroxybenzoic acid; orange vanillyl-type monomers and green syringyl-type monomers. * Not detectable