کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7787302 1500624 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of sub- and supercritical water treatments on the physicochemical properties of crab shell chitin and its enzymatic degradation
ترجمه فارسی عنوان
اثر تیمار آب زیرزمینی و فوق بحرانی بر خواص فیزیکوشیمیایی کیتین پوسته خرچنگ و تخریب آنزیمی آن
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
This study examined the effects of sub- and supercritical water pretreatments on the physicochemical properties of crab shell α-chitin and its enzymatic degradation to obtain N,N′-diacetylchitobiose (GlcNAc)2. Following sub- and supercritical water pretreatments, the protein in the crab shell was removed and the residue of crab shell contained α-chitin and CaCO3. Prolonged pretreatment led to α-chitin decomposition. The reaction of pure α-chitin in sub- and supercritical water pretreatments was investigated separately; we observed lower mean molecular weight and weaker hydrogen bonds compared with untreated α-chitin. (GlcNAc)2 yields from enzymatic degradation of subcritical (350 °C, 7 min) and supercritical water (400 °C, 2.5 min) pretreated crab shell were 8% and 6%, compared with 0% without any pretreatment. This study shows that sub- and supercritical water pretreatments of crab shell provide to an alternative method to the use of acid and base for decalcification and deproteinization of crab shell required for (GlcNAc)2 production.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 134, 10 December 2015, Pages 718-725
نویسندگان
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