کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5157027 | 1500595 | 2017 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation of low molecular weight oligomers from chitin and chitosan stimulated by plasma-assisted processes
ترجمه فارسی عنوان
تشکیل الیگومرهای مولکولی کم از کیتین و کیتوزان تحریک شده توسط فرآیندهای پلاسما
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
The controlled degradation of solid powders of chitin and chitosan stimulated by electron-beam plasma (EBP) was experimentally studied. Crab shell chitin and chitosan were used as original substances. The non-equilibrium low temperature EBP was generated by injecting an electron beam into a gaseous medium. Chitooligosaccharides with Mw = 800-2000 Da and polydispersion 1.5-2.5 were formed due to the EBP-treatment of chitin and chitosan. The β-1,4 glycosidic bounds in original polymers degrade under the action of active oxygen species produced in the EBP. Low molecular weight products of chitosan inhibited the growth of various yeast-like and filamentous fungi at minimum inhibitory concentration 500 mcg/ml. By optimizing the treatment conditions and using special techniques of reaction volume formation the 95% yield of chitooligosaccharides was obtained after 2 min whereas the conventional chemical hydrolysis usually takes several days. The EBP-stimulated hydrolysis is promising for effective polysaccharides degradation and can be competitive with traditional technologies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 163, 1 May 2017, Pages 54-61
Journal: Carbohydrate Polymers - Volume 163, 1 May 2017, Pages 54-61
نویسندگان
T. Vasilieva, A. Sigarev, D. Kosyakov, N. Ul'yanovskii, E. Anikeenko, D. Chuhchin, A. Ladesov, Aung Myat Hein, V. Miasnikov,