The Detection and Estimation of Insect Chitin; and the Irrelation of “Chitinization” to Hardness and Pigmentation of the Cuticula of the American Cockroach, Periplaneta Americana L

摘要: The cuticula and intima of insects have long been known to contain an organic compound remarkable for its insolubility in solutions potassium hydroxide or sodium any concentration. Through this property it was discovered the elytra May beetles by Odier (36) 1823 named chitine (spelled chitin German English), him from χιτών , a Greek garment. This substance is well name American entomologists who frequently use term “chitinous” “chitinized” morphological taxonomic descriptions, but properties distribution are still so poorly understood them that these terms often misapplied.