کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7620886 | 1494509 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rapid and effective evaluation of the antioxidant capacity of propolis extracts using DPPH bleaching kinetic profiles, FT-IR and UV-vis spectroscopic data
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
An informative and effective measure of antioxidant capacity based on DPPH (2,2-diphenyl-1-picrylhydrazyl) bleaching kinetic profiles has been developed using principal component analysis (PCA). The activity score and a related parameter, called quercetin factor (QF), were used to estimate antioxidant capacity for 39 propolis extracts based on the first principal component (which explains 98% of the total variance). Determination of the QF parameter requires less time and reagents than previous DPPH-based antioxidant capacity parameters, but does require additional equipment. Additionally, UV-vis and FT-IR spectroscopic features of propolis extracts have been identified, which have been correlated to antioxidant capacity, and offer a spectroscopic and reagent-less rapid evaluation method of the antioxidant activity of biological samples. Together the QF scores based on DPPH bleaching and FT-IR and UV-vis spectra are analyzed in terms of antioxidant capacity, floral origin, and geographic location.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Food Composition and Analysis - Volume 24, Issues 4â5, JuneâAugust 2011, Pages 516-522
Journal: Journal of Food Composition and Analysis - Volume 24, Issues 4â5, JuneâAugust 2011, Pages 516-522
نویسندگان
Augustin CÄtÄlin MoÅ£, Radu Silaghi-Dumitrescu, Costel Sârbu,