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Deconvoluted FTIR spectra of a) Native sugarcane bagasse, b) Oxalic acid fiber expansion (OAFEX) and c) Enzyme digested cellulignin showing: the free hydroxyl (band 1), Valence vibration of H-bonded OH groups and intramolecular H-bond (band 2) and Intermolecular H-bond (band 3).
