Methods: Ethanol as solvent, using ultrasonic extraction method of total flavonoids in propolis extracted using ultraviolet-visible spectrophotometry of total flavonoids were determined.
方法：以乙醇为溶剂，采用超声提取的方法对蜂胶中的总黄酮进行提取，利用紫外-可见分光光度法对总黄酮的含量进行测定。
The method for extraction genomic DNA from insect sample, such as ants, longicorn beetles and grasshoppers, which stored in formalin or 75% ethanol for 2~4 weeks, is described.
以蚂蚁、天牛、蝗虫等昆虫为实验材料，建立了75%酒精常温浸泡密封保存和福尔马林常温浸泡密封保存昆虫样品2~4周后进行全基因组DNA提取的方法。
Conclusion the ethanol extraction of baicalin antibacterial active ingredients better than the boiling method.
结论乙醇回流法提取黄芩有效成分的抑菌效果较水煮法好。
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