Figure 1

(a) Unbleached (A,B,C) and bleached (D,E,F) chitins extracted from H. illucens larvae (A,D), pupal exuviae (B,E) and dead adults (C,F). Commercial chitin produced from crustaceans is also shown (G); (b) unbleached (A,B,C) and bleached (D,E,F) chitosan produced from H. illucens larvae (A,D), pupal exuviae (B,E) and dead adults (C,F). Commercial chitosan derived from shrimp shells is also shown (G); (c) films obtained from unbleached (A,B,C) and bleached (D,E,F) chitosan produced from H. illucens larvae (A,D), pupal exuviae (B,E) and dead adults (C,F). Film obtained from commercial chitosan is also reported (G).