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FTIR of chitin (A) and chitosan (B) produced from silkworm pupae; range: 1400–1700 cm−1. Reprinted from Carbohydrate Polymers 64, 2006, Paulino, A.T., Simionato, J.I., Garcia, J.C., Nozaki J., Characterization of chitosan and chitin produced from silkworm crysalides, 98–103, Copyright (2010), with permission from Elsevier [114].
