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Selectivity of deproteinization and demineralization using natural deep eutectic solvents for production of insect chitin (Hermetia illucens). 2019

Pengfei Zhou, and Jingbo Li, and Tao Yan, and Xuping Wang, and Jing Huang, and Zheshi Kuang, and Mingqiang Ye, and Mushui Pan
Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510610, China.

Selectivity of deproteinization and demineralization using natural deep eutectic solvents for preparation of insect chitin (Hermetia illucens) was investigated. The relationships between the pH and pKa values of NADESs and demineralization, deproteinization and crystallinity indexes of the obtained chitin were discussed, respectively. It was found that the acidic NADESs consist of basic hydrogen bond acceptor (HBA) and acidic hydrogen bond donor (HBD), or the alkali NADESs composed of acid HBA and alkali HBD were better for chitin products. After reused for three times, demineralization and deproteinization abilities of NADESs were not significantly decreased. Mechanistic analysis indicated that H+ released from HBA or HBD was the main reason for demineralization, whereas intermolecular and intramolecular hydrogen bond in NADESs facilitates the removal of protein. Overall, this report provides a preliminary reference for design of the sustainable NADESs for preparation of chitin from natural resources.

UI MeSH Term Description Entries
D002686 Chitin A linear polysaccharide of beta-1->4 linked units of ACETYLGLUCOSAMINE. It is the second most abundant biopolymer on earth, found especially in INSECTS and FUNGI. When deacetylated it is called CHITOSAN.
D004175 Diptera An order of the class Insecta. Wings, when present, number two and distinguish Diptera from other so-called flies, while the halteres, or reduced hindwings, separate Diptera from other insects with one pair of wings. The order includes the families Calliphoridae, Oestridae, Phoridae, SARCOPHAGIDAE, Scatophagidae, Sciaridae, SIMULIIDAE, Tabanidae, Therevidae, Trypetidae, CERATOPOGONIDAE; CHIRONOMIDAE; CULICIDAE; DROSOPHILIDAE; GLOSSINIDAE; MUSCIDAE; TEPHRITIDAE; and PSYCHODIDAE. The larval form of Diptera species are called maggots (see LARVA). Flies, True,Flies,Dipteras,Fly,Fly, True,True Flies,True Fly
D006860 Hydrogen Bonding A low-energy attractive force between hydrogen and another element. It plays a major role in determining the properties of water, proteins, and other compounds. Hydrogen Bonds,Bond, Hydrogen,Hydrogen Bond
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012997 Solvents Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed) Solvent

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