Fig. 8
Comparison of Fourier transform infrared spectroscopic profiling among the raw materials (black) and three optimal pretreated (LHW-pink, 4% H2SO4-blue, 4% NaOH-red) biomass residues of Pair II Miscanthus samples. Dot squares indicated the majorly altered bonds from the optimal pretreatments as elucidated in Additional file 1: Table S11