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- W2368904468 abstract "The optimal technological conditions were studied on extracting chitin. Alcalase and citric acid were used in the extraction to remove the protein and calcium of shrimp shells and ultrasonic wave combined with alkali to isolate chitin deacetylase and produce chitosan. The result indicates the optimal technological condition for the alcalase removing protein is: 1 ∶ 10 ratio of material and water,pH 8. 0,60℃,enzyme activity 800U / g,5 hours reaction and protein removing rate is 32. 87%. The overall decalcification effect of citric acid is better than that of hydrocloric acid,and ash proportion of decalcified chitin is 0. 87%,which met the food grade requirements. Ultra-sonic pretreatment improves deacetylase degree of chitosan dramatically. NaOH treatment after ultrasonic pre-treated chitins can produce chitosan with over 90% deacetylase. The best conditionof ultrasonic pretreatment is power 600 W and treatment for 40 min." @default.
- W2368904468 created "2016-06-24" @default.
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- W2368904468 date "2013-01-01" @default.
- W2368904468 modified "2023-09-26" @default.
- W2368904468 title "Study on extraction of chitin and chitosan from shrimp shells" @default.
- W2368904468 hasPublicationYear "2013" @default.
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