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为确定贮藏时间对箬叶清除自由基能力和抑菌效果的影响,对4个不同贮藏年份的阔叶箬竹叶水提取液和85%乙醇提取液清除DPPH·的能力以及抑制大肠杆菌和金黄色葡萄球菌的效果进行了比较研究。结果表明,贮藏2、3年和4年后,水提取液对DPPH·的清除率分别下降了22.4%、26.4%和32.9%,醇提取液对DPPH·的清除率分别下降了15.2%、23.6%和33.8%;水提取液抑制大肠杆菌的能力分别降低了20.7%、30.5%和43.1%,醇提取液抑制大肠杆菌的能力分别降低了18.0%、27.5%和40.1%;水提取液抑制金黄色葡萄球菌的能力分别降低了20.0%、31.5%和41.8%,醇提取液抑制金黄色葡萄球菌的能力分别降低了17.3%、27.5%和40.1%。醇提取液清除DPPH·的能力和抑菌效果都优于水提取液。
In order to determine the effect of storage time on free radical scavenging ability and antibacterial activity of leaves, the effects of DPPH · on DPPH · and the inhibition of E. coli and gold The effects of Staphylococcus aureus were compared. The results showed that the DPPH · scavenging rates of aqueous extracts decreased by 22.4%, 26.4% and 32.9% respectively after 2, 3 and 4 years of storage, while the scavenging rates of DPPH · by alcohol extracts decreased by 15.2% and 23.6%, respectively % And 33.8%, respectively. The ability of aqueous extract to inhibit E.coli was reduced by 20.7%, 30.5% and 43.1%, respectively. The ability of alcohol extracts to inhibit E.coli was reduced by 18.0%, 27.5% and 40.1% The ability of Staphylococcus aureus was reduced by 20.0%, 31.5% and 41.8%, respectively. The ability of alcohol extract to inhibit Staphylococcus aureus was reduced by 17.3%, 27.5% and 40.1%, respectively. The ability of alcohol extract to scavenge DPPH · is better than that of water extract.