کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9616705 | 48915 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
α-Amylase-catalysed synthesis of alkyl glycosides
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Alkyl glycosides were synthesised from starch and alcohols using Aspergillus oryzae α-amylase as catalyst. In the degradation of starch by α-amylase, the alcohols competed with water as glycosyl acceptors. In the reaction with methanol, methyl maltoside and methyl maltotrioside were the main alcoholysis products. Conversion of 45 g/l starch in 30% methanol resulted in a product mixture containing 26 mM maltooligosaccharides and 3.6 mM methyl glycosides. With ethanol, propanol and butanol, alkyl maltosides and alkyl maltotetraosides were detected, and with benzyl alcohol, benzyl glycosides having two, three or five glucose units were formed. No alcoholysis reaction occurred with hexanol or octanol. In conclusion, α-amylase is promising for the one-step synthesis of alkyl glycosides having more than one monosaccharide unit, which are difficult to synthesise in other ways.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 37, Issues 1â6, 1 December 2005, Pages 84-87
Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 37, Issues 1â6, 1 December 2005, Pages 84-87
نویسندگان
Julia Larsson, David Svensson, Patrick Adlercreutz,