Figure 4From: Pretreatment of rice straw with combined process using dilute sulfuric acid and aqueous ammoniaInstrumental analysis of biomass before and after pretreatment. (A): Results of XRD. Crystalline region at 2θ = 22° and amorphous portion at 2θ = 18° were used to calculate crystallinity index (CrI); (B): Relationship of CrI with enzyme digestibility; (C): Results of FTIR spectroscopy.Back to article page