科研之友
微信
新浪微博
Facebook
分享链接
摘要
The aim of this study was to evaluate antioxidant and antimicrobial activities of different extracts from Clinacanthus nutans. Powdered leaf samples were extracted with 70% ethanol and distilled water using ultrasonic-assisted extraction method, respectively. The strongest antioxidant activities in 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, center dot OH scavenging and reducing power were obtained from ethanol extracts compared to distilled water. Ethanol extracts also possessed the highest antimicrobial activity against Staphylococcus aureus among three selected microorganisms, with an inhibition zone diameter of 12.5 +/- 0.7 mm at 10 mg/mL. Furthermore, pH at 5-6 and temperature at 40-60 degrees C conditions were good for antimicrobial activity. These results illuminated a potential market role for Clinacanthus nutans as a functional food ingredient or nutraceutical.
