Fig. 7From: Performance of three delignifying pretreatments on hardwoods: hydrolysis yields, comprehensive mass balances, and lignin propertiesResults for a phenolic monomer yields from quantitative thioacidolysis and b correlation between aromatic monomer yield by quantitative thioacidolysis and β-O-4 content of the pretreatment-solubilized and recovered lignin as determined by 13C NMR. “Pre-Extr.” refers to the alkaline pre-extraction step or the first stage of the Cu-AHP process, while “Cu-AHP” refers to the second step of the alkaline oxidative Cu-AHP stage. “CEL” refers to the cellulolytic lignin used as a control as “native” ligninBack to article page