Chemical Composition and Antioxidant Activity of Ramie Leaf (Boehmeria Nivea L.)
Food Sci. Biotechnol. Vol. 18, No. 5, pp. 1096 ~ 1099 (2009) ⓒ The Korean Society of Food Science and Technology Chemical Composition and Antioxidant Activity of Ramie Leaf (Boehmeria nivea L.) Youn Ri Lee, Jin Woo Nho, In Guk Hwang, Woon Ju Kim1, Yu Jin Lee1, and Heon Sang Jeong* Department of Food Science and Technology, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea 1Department of Food Science and Nutrition, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea Abstract This study investigated change in the chemical components and antioxidant activity of ramie (Boehmeria nivea) leaves (RL) for the development of functional foods. Proximate compositions of protein, crude ash, and crude fat were 24.49, 11.41, and 4.89%, respectively. Contents of minerals of calcium (Ca), potassium (K), magnesium (Mg), and iron (Fe) were 1,874, 1,433, 362, and 16 mg/100 g, respectively. α, β, and γ-Tocopherol contents were 9.79, 0.18, and 1.44 mg/100 g, respectively. Linoleic and linolenic acid contents were higher than those of palmatic and stearic acid. Total phenolic and flavonoids contents showed the high level of 149 and 49 mg/g. The IC50 values of 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydroxyl, and superoxide radical scavenging of RL extracts were 688, 424, and 596 µg/mL, respectively, while the radical scavenging values by butylated hydroxylanisole (BHA) were 92, 58, and 98 µg/mL, respectively. Thus, RL has the potential to be used as a healthy and functional food ingredient. Keywords: ramie leaf (Boehmeria nivea L.), proximate composition, mineral, tocopherol, radical scavenging activity Introduction particular, since it has been found that the green leaves of plants are rich in nutritional ingredients such as vitamins, Phytochemicals are bioactive substances of plants that have mineral matters, and proteins and in various bioactive been associated with the protection of human health against materials (8), there have been continuous researches on chronic degenerative diseases (1).
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