Alkali- or acid-induced changes in structure, moisture absorption ability and deacetylating reaction of 尾-chitin extracted from jumbo squid (Dosidicus gigas) pens

详细信息    查看全文

• 作者：Jooyeoun Jung ; Yanyun Zhao
• 关键词：伪-Chitin ; 尾-Chitin ; Jumbo squid pens ; Structural modification ; Crystallinity ; Moisture absorption ability ; Deacetylating reaction
• 刊名：Food Chemistry
• 出版年：1 June, 2014
• 年：2014
• 卷：152
• 期：Complete
• 页码：355-362
• 全文大小：868 K

文摘

Alkali- or acid-induced structural modifications in 尾-chitin from squid (Dosidicus gigas, d鈥橭rbigny, 1835) pens and their moisture absorption ability (MAA) and deacetylating reaction were investigated and compared with 伪-chitin from shrimp shells. 尾-Chitin was converted into the 伪-form after 3 h in 40% NaOH or 1-3 h in 40% HCl solution, and 伪-chitin obtained from NaOH treatment had higher MAA than had native 伪-chitin, due to polymorphic destructions. In contrast, induced 伪-chitin from acid treatment of 尾-chitin had few polymorphic modifications, showing no significant change (P > 0.05) in MAA. 尾-Chitin was more susceptible to alkali deacetylation than was 伪-chitin, and required a lower concentration of NaOH and shorter reaction time. These results demonstrate that alkali- or acid-treated 尾-chitin retained high susceptibility toward solvents, which in turn resulted in good biological activity of 尾-chitosan for use as a natural antioxidant and antimicrobial substance or application as edible coatings and films for various food applications.