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Fig. 3 | Biotechnology for Biofuels

Fig. 3

From: Quantitative 13C MultiCP solid-state NMR as a tool for evaluation of cellulose crystallinity index measured directly inside sugarcane biomass

Fig. 3

Effects of pretreatments in the NMR spectra. MultiCP spectra with chemical shift assignments obtained in sugarcane bagasse under three pretreatment conditions (untreated, 1% H2SO4 and 1% H2SO4 + 4% NaOH). The red dotted lines represent the MultiCP spectrum of the lyophilized supernatant resulting from a pretreatment with 1% H2SO4 + 0.25% NaOH. The inset shows the lignin fraction in each sample with respect to the untreated bagasse, obtained from the scaling factor that matches the lignin signals of the supernatant with those from the solid pretreated biomass.

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