“…All peaks present in the coatings over aluminum substrates could not be observed due to overlapping with jarina seed peaks. The seed presents a similar spectrum to cellulose, [48,49] with peaks associated with OH (3,700-3,000, 1,641 cm −1 ), CH 2 (2,912, 2,875 cm −1 ), CH 3 (2,930, 2,894 cm −1 ), C-O-C (1,178 cm −1 ), and C-O (1,062 cm −1 ) bonds. However, peaks corresponding to crystalline mannan (3,492,3,297, and 3,359 cm −1 ), Dmannopyranose units (870 cm −1 ), and α-mannose (800 cm −1 ) confirm that the seed is constituted by mannan polysaccharide.…”