Ảnh hưởng của điều kiện chiết xuất đến hoạt tính chống oxy hóa của cây lá đắng (Vernonia amygdalina Del.; Asteraceae)=Effect of extraction conditions on the antioxidant activity of Vernonia amygdalina Del. (Asteraceae)

• Ngôn ngữ: vie
• Thông tin xuất bản: Tạp chí Phát triển Khoa học & Công nghệ: Chuyên san Kỹ thuật & Công nghệ, 2018
• Bộ sưu tập: Báo, Tạp chí
• ID: 471706

Tóm tắt

In this study, the effect of extraction conditions on the antioxidant activity of Vernonia amygdalina Del. (Asteraceae) was evaluated by Response surface methodology and central composite design (RSM-CCD) to predict the content of phenolic compounds with maximum antioxidant activity. Total phenol and flavonoid contents were determined by spectrophotometry method, especially the flavonoid content was identified by HPLC-DAD system. The antioxidant activity was estimated by the DPPH and the FRAP method. Results showed that extracting time, extracting temperature and solvent-to-material ratio had a significant effect on phenolic content (p