کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10597099 981955 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Classification and kinetic analysis of viscosity growth processes for NaOH-gelatinized rice starches
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Classification and kinetic analysis of viscosity growth processes for NaOH-gelatinized rice starches
چکیده انگلیسی
Using capillary viscometry, viscosity growth processes were studied for non-glutinous rice starches gelatinized with different NaOH solution concentrations. The viscosity-time data series generally conformed to sigmoid curves with an arbitrary inflection point (IP) for each curve, and were analyzed using a kinetic model that incorporated a first-order reaction rate equation and a mixing rule of a power-law type. The shapes of curves were classified with the exponent ? or the ratio ?*/?G, where ?* and ?G were viscosities at IP and at equilibrium, respectively. It was argued that these parameters were related to the complex formation arising from NaOH-starch interactions. The rate constant K defined uniformly for an entire process increased with NaOH concentration and was power-law dependent. Furthermore, it was suggested that gelatinization evolved non-uniformly over time. A non-uniform analysis was then performed by disassembling the entire process into several elementary stages and revealed the evolutionary process for K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 97, Issue 2, 12 September 2013, Pages 558-564
نویسندگان
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