Optimization of ultrasonic extraction condition for maximal antioxidant, antimicrobial, and antityrosinase activity from Hibiscus cannabinus L. leaves by using the single factor experiment

红麻 木槿 DPPH 阿布茨 萃取(化学) 化学 蜡样芽孢杆菌 食品科学 响应面法 抗菌剂 类黄酮 抗氧化剂 植物 色谱法 细菌 生物 生物化学 有机化学 纤维 遗传学
作者
Sin Yi Chew,Swee Yong Teoh,Yan Yi Sim,Kar Lin Nyam
出处
期刊:Journal of Applied Research on Medicinal and Aromatic Plants [Elsevier BV]
卷期号:25: 100321-100321 被引量:5
标识
DOI:10.1016/j.jarmap.2021.100321
摘要

A single factor experiment design was employed to optimize ultrasonic assisted extraction of Hibiscus cannabinus L. (kenaf) leaves. Ethanol concentration and extraction times (min) were optimized in the study as this extraction parameters were believed to have effect on the recovery of bioactive compounds derived from kenaf leaves extract (KLE). Considering all the results obtained from the experiment, it displayed that the 95 % ethanolic kenaf leaves that went through 3 min extraction was the optimum extraction condition, with significant highest (p < 0.05) of total flavonoid content (TFC) (48.20 ± 0.15 mgCHE/g), 2,2-Diphenyl-1-picrylhydrazyl (DPPH) (33.99 ± 1.58 mgTEAC/g) and 2,2′-Azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging assay (34.23 ± 0.18 mgTEAC/g). TFC was significantly correlated with DPPH and ABTS under the effects of ethanol concentration. The optimized KLE also showed high total phenolic content (TPC), ferric reducing antioxidant power (FRAP), and tyrosinase inhibitory activity. Besides, the optimized KLE were reported to be effective in bactericidal activity against five investigated pathogenic bacteria (Bacillus cereus, Staphylococcus epidermis, Salmonella, Pseudomonas aeruginosa, and Escherichia coli) with the minimum inhibitory concentration (MIC) values of 2.5, 5 and 10 mg/mL.
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