کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2548606 1645498 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Antioxidant activity of ethanolic and aqueous extracts of Uncaria tomentosa (Willd.) DC.
موضوعات مرتبط
علوم پزشکی و سلامت داروسازی، سم شناسی و علوم دارویی داروشناسی
پیش نمایش صفحه اول مقاله
Antioxidant activity of ethanolic and aqueous extracts of Uncaria tomentosa (Willd.) DC.
چکیده انگلیسی

The antioxidant properties of aqueous and ethanolic extracts of the Uncaria tomentosa bark were evaluated. The analysis included trolox equivalent antioxidant capacity (TEAC), peroxyl radical-trapping capacity (PRTC), superoxide radical scavenging activity (SOD) and quantitation of total tannins (TT) and total phenolic compounds (TPC). The obtained results indicate high antioxidant capacity of the studied materials in comparison to the other extracts of fruits, vegetables, cereals and medicinal plants. Higher antioxidant activity and total phenolic compounds of the alcoholic preparations – TEAC = 0.57 mmol of Trolox/g, PRTC = 0.52 mmol of Trolox/g and SOD = 0.39 U/mg than of the aqueous preparation – TEAC = 0.34 mmol of Trolox/g, PRTC = 0.19 mmol of Trolox/g and SOD = 0.10 U/mg were observed. These results might suggest higher medical suitability of alcoholic extracts. However, the highly elevated level of tannins in alcoholic extracts may cause undesirable gastric effects.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Ethnopharmacology - Volume 104, Issues 1–2, 8 March 2006, Pages 18–23
نویسندگان
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