红檵木幼叶的水和醇水提取物抑菌活性分析

用蒸馏水和20%乙醇经微波辅助处理提取红檵木幼叶成分，对该水和醇水的提取物进行浓缩或萃取精制，采用牛津杯法测定水和醇水提取物样液对3种细菌的抑制效果，并用平板稀释法测定其最小抑菌浓度.幼叶水提取液对3种细菌都有明显的抑制作用，抑菌圈较大，对大肠杆菌、金黄色葡萄球菌和痢疾杆菌的最小抑菌生药质量浓度分别为 0.014，0.010，0.010 g/mL；幼叶的醇提取液对大肠杆菌的抑制效果不明显，对金黄色葡萄球菌和痢疾杆菌有较强抑制作用,其最小抑菌生药质量浓度分别为0.011，0.014 g/mL.

Bacteriorstasis of the Pigments Extracted from the L. Chinense Var. Rubrum Leaf

The pigment in the browse leaves was extracted from L. Chinese Var. Rubrum leaf with Microwave treatment and distilled water or 20% EtOH.The antibacterial activities of the extracts on the three kinds  bacteria were determined by Oxford Cup method.If the extracts can abstrain the bacteria obviously,the MIC of crude drug were determined by microdilution technique.The results show that the  extracts from browse leaves by distilled water under microwave treatment have obviously antimicrobial activity on three kinds bacteria,the MIC of crude drug of the extracts from browse leaves on E. coli,shigella dysenteroae,staphylococlus aureus are 0.014 g/mL,0.010 g/mL,and 0.010 g/mL.The extracts from  browse leaves by 20% EtOH were obviously active against staphylococlus aureus and shigella dysenteroae but can not abstrain the E.coli.