Fig. 1From: Performance of three delignifying pretreatments on hardwoods: hydrolysis yields, comprehensive mass balances, and lignin propertiesSolubilization of a lignin and b xylan during each of the pretreatments as determined by a combination of composition analysis and mass yield following pretreatment. For Cu-AHP, the solid color represents the first stage of the pretreatment (alkaline pre-extraction), while the semitransparent color represents the second stage (alkaline oxidative Cu-AHP delignification) with all values on a per mass original biomass basisBack to article page