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Avicenna Journal of Phytomedicine، جلد ۳، شماره ۱، صفحات ۲۵-۳۴
عنوان فارسی
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عنوان انگلیسی Antioxidant activities of two sweet pepper Capsicum annuum L. varieties phenolic extracts and the effects of thermal treatment
چکیده انگلیسی مقاله Objectives: Sweet peppers Capsicum annuum L. (C. annuum) are an excellent source of vitamins A and C as well as phenolic compounds, which are important antioxidant components that may reduce the risk of diseases. The objective of this study was to evaluate their antioxidant activity under various temperatures. Materials and Methods: To compare the antioxidant activity in various temperatures (20, 35, 50, and 65 °C), two different types of colored (red and green) sweet bell peppers C annuum were selected. The red peppers were selected from those cultivated in Shahreza, Esfahan and the green peppers with the local name of Gijlar were selected from those cultivated in Urmia, West Azarbayjan. The experiments were carried out to measure the total phenolic and flavonoid content, ferric reducing antioxidant power (FRAP), chain-breaking activity, scavenging activities of 2,2-diphenyl-1-picrylhydrazyl (DPPH), and hydrogen peroxide radicals. Results: Total phenol and flavonoid contents of pepper extracts were enhanced with increasing temperature to 65 °C. Scavenging capacity of DPPH radical of red pepper extract was enhanced because of putting at 50 °C for 30 min and for Gijlar pepper extract scavenging capacity was increased at 65 °C. Scavenging capacity of hydrogen peroxide radical of extracts was the highest at 35 °C. Chain-breaking activity of red pepper extract was increased for 60 min at 35 °C. FRAP (C) of red pepper extract was significantly different (p< 0.05) in compare with Gijlar pepper. Conclusion: An appropriate temperature maintained a high antioxidant activity of phenolic compound, which could be due to the combined effect of non enzymatic reaction and phenolic compound stability.
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نویسندگان مقاله نرمین i یزدی زاده شتربان | narmin i yazdizadeh shotorban
department of biology, faculty of science, urmia university, urmia, i. r. iran

سازمان اصلی تایید شده: دانشگاه ارومیه (Urmia university)

رشید جامعی | rashid jamei
department of biology, faculty of science, urmia university, urmia, i. r. iran

سازمان اصلی تایید شده: دانشگاه ارومیه (Urmia university)

رضا حیدری | reza heidari
department of biology, faculty of science, urmia university, urmia, i. r. iran

سازمان اصلی تایید شده: دانشگاه ارومیه (Urmia university)

نشانی اینترنتی http://ajp.mums.ac.ir/article_8.html
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Research Article
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