Extraction, antioxidant capacity and antibacterial activities of essential oil from Piper betle L.
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摘要: 采用水蒸气提取法对蒌叶挥发油进行提取,在单因素实验的基础上,以正交实验筛选最佳的提取工艺条件;同时考察蒌叶挥发油抗氧化和抑菌活性。结果表明,蒌叶挥发油提取的最佳工艺条件为:料液比m干蒌叶粉∶V水=50∶1000（g/m L）,超声时间为30 min,超声温度70℃,超声功率192 W,加热回流提取4 h,蒌叶挥发油的得率为2.96%。蒌叶挥发油清除DPPH·和·OH的IC50分别为33.19、71.11μg/m L;挥发油对金黄色葡萄球菌、枯草杆菌、大肠杆菌、蜡状芽孢杆菌、四联球菌、藤黄八叠球菌、白色葡萄球菌、黑曲霉、毛霉、青霉均有明显的抗菌活性,其MIC分别为0.625、1.25、0.625、0.625、0.625、2.50、1.25、0.313、0.625、0.313 mg/m L,故蒌叶挥发油具有较强的抗氧化和抑菌活性。Abstract: The essential oil was extracted by hydrodistillation, and the best extraction technology were studied through single factor experiment and orthogonal experiment.The antioxidant and antimicrobial activities of the essential oil from Piper betle L.were investigated.The results indicated that the optimal conditions were solid-to-liquid ratio 50∶ 1000 g/m L, ultrasonic time of30 min, extraction temperature of 70 ℃, ultrasonic power of 192 W, heated refluxed of 4 h, the extraction rate of Piper betle L.essential oil was 2.96%.The IC50 of the oil for scavenging activities against DPPH free radical and hydroxyl free radical were33.19 μg/m L and 71.11 μg/m L. The oil had certain antibacterial activity on the microorganisms, the minimal inhibitory concentration of Staphyloccocus aureus, Bacillus subtilis, Escherichia coli, Bacillus cereus, Micrococcus tetragenus, Sarcina lutea, Staphylococcus albus, Aspergillus niger, Mucor, Penicillium were 0.625, 1.25, 0.625, 0.625, 0.625, 2.50, 1.25, 0.313, 0.625, 0.313 mg/m L, respectively. In conclusion, the essential oil from Piper betle L. had strong antioxidative and antibacterial activities.
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Keywords:
- Piper betle L /
- essential oil /
- antioxidant activity /
- antimicrobial activity
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