Woo, Koan-Sik, Hwang, In-Guk, Kim, Tae-Myoung, Kim, Dae-Joong, Hong, Jin-Tae, Jeong, Heon-Sang
언어
영어(ENG)
URL
https://www.earticle.net/Article/A79251
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원문정보
초록
영어
We evaluated the effects of heat treatment on various properties of onion extracts (Allium cepa). Onion was heated at various temperatures (110-150℃) for various times (1-5 hr), and the total polyphenol, flavonoid, and free sugar contents, and antioxidant activity were investigated. With increased heating temperatures and exposure times, the total contents of polyphenols and flavonoids, as well as antioxidant activity increased. The highest total polyphenol content (189.80 mg/100g) occurred after heating for 2 hr at 140℃. The highest total flavonoid content (252.51 mg/100g) occurred after heating for 3 hr at . The antioxidant activity assessed using the DPPH method was highest, at 2.1 mg/mL (IC50 value), after heating for 2 hr at 150℃. Correlations between antioxidant activity and the total polyphenol, total flavonoid, and fructose contents were highly significant (all p<0.01). The optimal heating time and temperature were 2 hr and 130℃.
목차
Abstract Introduction Materials and Methods Results and Discussion Acknowledgments References