Fig. 2From: Polystyrene sulfonate is effective for enhancing biomass enzymatic saccharification under green liquor pretreatment in bioenergy poplarChemical characterizations of PSS by a FT-IR spectra, b 1H-NMR spectra, c viscosity molecular weight. The black symbols were obtained from Huggins formula and the red symbols was obtained from Kraemer formula in cBack to article page