Fig. 2
From: Separate hydrolysis and fermentation of softwood bark pretreated with 2-naphthol by steam explosion
Cut and area-normalized FTIR spectra of steam-exploded biomass samples washed with water (a), as well as total aromatics indicated by UV‒Vis absorbance at 280 nm (b), and total phenolic (c), furfural and 5-HMF (d) concentrations in the water extracts. The contribution of the furans to the total aromatic content was subtracted from the UV‒Vis absorbance at 280 nm