کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7789240 | 1500636 | 2015 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Biodegradation of starch films: The roles of molecular and crystalline structure
ترجمه فارسی عنوان
تجزیه زیستی از فیلم های نشاسته: نقش ساختار مولکولی و بلورین
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کلمات کلیدی
SECTPsDMSO - DMSOSize-exclusion chromatography - اندازه گیری کروماتوگرافی حذف شدهLos - اینBioplastic - بیوپلاستیanalysis of variance - تحلیل واریانسANOVA - تحلیل واریانس Analysis of varianceEnzymatic degradation - تخریب آنزیمیDimethylsulfoxide - دیمتیل سولفواکسیدMolecular structure - ساختار مولکولیStarch - نشاسته Thermoplastic starch - نشاسته ترموپلاستیکCrystallinity - کریستالی شدن یا تبلور
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
The influences of molecular, crystalline and granular structures on the biodegradability of compression-molded starch films were investigated. Fungal α-amylase was used as model degradation agent. The substrates comprised varied starch structures obtained by different degrees of acid hydrolysis, different granular sizes using size fractionation, and different degrees of crystallinity by aging for different times (up to 14 days). Two stages are identified for unretrograded films by fitting degradation data using first-order kinetics. Starch films containing larger molecules were degraded faster, but the rate coefficient was independent of the granule size. Retrograded films were degraded much slower than unretrograded ones, with a similar rate coefficient to that in the second stage of unretrograded films. Although initially the smaller molecules or the easily accessible starch chains on the amorphous film surface were degraded faster, the more ordered structure (resistant starch) formed from retrogradation, either before or during enzymatic degradation, strongly inhibits film biodegradation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 122, 20 May 2015, Pages 115-122
Journal: Carbohydrate Polymers - Volume 122, 20 May 2015, Pages 115-122
نویسندگان
Ming Li, Torsten Witt, Fengwei Xie, Frederick J. Warren, Peter J. Halley, Robert G. Gilbert,