کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1189467 963512 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Proton NMR relaxation study of swelling and gelatinisation process in rice starch–water samples
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Proton NMR relaxation study of swelling and gelatinisation process in rice starch–water samples
چکیده انگلیسی

Proton transverse magnetization decay curves of rice flour starch–water samples were measured and analysed for the presence of four components in the relaxation curve. T2 values were interpreted on the basis of the diffusive and chemical exchange model that provided evidence for extra granular bulk water and three more water populations whose relaxation rate is governed by diffusive and chemical exchange with starch components. The analysis of relaxation data provided information on dynamics of water molecules as well as on the size and dispersion of diffusive domains. Furthermore, by measuring solid to liquid ratio, transverse and longitudinal relaxation curves of starch–water mixtures at increasing temperatures – from 20 to 77 °C – swelling and gelatinisation processes were monitored.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 110, Issue 1, 1 September 2008, Pages 14–22
نویسندگان
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