کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7788795 | 1500634 | 2015 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical characterization of gelatinized starch dispersions: Voltammetry and electrochemical impedance spectroscopy on platinum surface
ترجمه فارسی عنوان
مشخصات الکتروشیمیایی پراکندگی نشاسته ژلاتینی شده: طیف سنجی ولتامتری و امپدانس الکتروشیمیایی روی سطح پلاتین
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
The electrochemical properties of gelatinized starch dispersions (GSD; 5% w/w) from different botanical sources were studied using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) tests over a platinum surface. The phenomenological modelling of EIS data using equivalent circuits indicated that after gelatinization the electrical resistance was determined mainly by the resistance of insoluble material (i.e., ghosts). Sonication of the GSD disrupted the ghost microstructure, and produced an increase in electrical conductivity by reducing the resistance of the insoluble material. The CV data showed three oxidation peaks at potentials where glucose solutions displayed oxidation waves. It is postulated that hydrolysis at the bulk and electrocatalyzed oxidation on the Pt-surface are reactions involved in the starch transformation. Starches peak intensity increased with the amylose content, suggesting that the amylose-rich matrix played an important role in the charge transfer in the electrolytic system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 124, 25 June 2015, Pages 8-16
Journal: Carbohydrate Polymers - Volume 124, 25 June 2015, Pages 8-16
نویسندگان
C. Hernandez-Jaimes, C. Lobato-Calleros, E. Sosa, L.A. Bello-Pérez, E.J. Vernon-Carter, J. Alvarez-Ramirez,