Đăng nhập
 
Tìm kiếm nâng cao
 
Tên bài báo
Tác giả
Năm xuất bản
Tóm tắt
Lĩnh vực
Phân loại
Số tạp chí
 

Bản tin định kỳ
Báo cáo thường niên
Tạp chí khoa học ĐHCT
Tạp chí tiếng anh ĐHCT
Tạp chí trong nước
Tạp chí quốc tế
Kỷ yếu HN trong nước
Kỷ yếu HN quốc tế
Book chapter
Bài báo - Tạp chí
29 (2023) Trang:
Tạp chí: Phân tích Hóa, Lý và Sinh học
Liên kết:

Ehretia asperula is a widely used as a medicinal plant in Vietnam. In the present study, leaves of Ehretia
asperula grown in Tay Ninh province were selected to evaluate their potential as antioxidant and
antibacterial agents. The antioxidant activities were determined by total antioxidant capacity, reducing
power, neutralize free radicals 2,2-diphenyl-1-picrylhydrazyl and 2,2’-azino-bis(3-ethylbenzothiazoline-
6-sulfonic aicd). The antibacterial activity was determined by determining the antibacterial ring
diameter, the minimum inhibitory concentration and the minimum bactericidal concentration of four
strains of Gram-negative bacteria and two strains of Gram-positive bacteria. The ethyl acetate fraction of
Ehretia asperula leaves had stronger antioxidant activity than the other extracts with EC
50 values
ranging from 10 to 20 µg/mL. Ehretia asperula leaf extracts were more effective against Gram-positive
bacteria than Gram-negative bacteria. The results show that there is a direct correlation between
polyphenol content, antioxidant activity and antibacterial activity. Thus, the leaves of Ehretia asperula
grown in Tay Ninh showed good antioxidant and antibacterial activities


 


Vietnamese | English






 
 
Vui lòng chờ...