Four constituents were isolated from Rhododendron micranthum Turcz . Their structures were identified ashyperin ,astragalin ,kaempferol ,and quercetin . Kaempferol wasisolated from the plantforthe firsttime . Hyperin ...Four constituents were isolated from Rhododendron micranthum Turcz . Their structures were identified ashyperin ,astragalin ,kaempferol ,and quercetin . Kaempferol wasisolated from the plantforthe firsttime . Hyperin wasthe main analgesic active constituent.展开更多
从安徽本地泡菜中筛选出一株具有抑菌活性的乳酸菌(编号为PC-3)。通过菌落形态观察、染色镜检、生理生化和分子生物学实验鉴定分析,鉴定为植物乳杆菌(Lactobacillus plantarum),并命名为Lactobacillus plantarum PC-3。通过实验排除乳...从安徽本地泡菜中筛选出一株具有抑菌活性的乳酸菌(编号为PC-3)。通过菌落形态观察、染色镜检、生理生化和分子生物学实验鉴定分析,鉴定为植物乳杆菌(Lactobacillus plantarum),并命名为Lactobacillus plantarum PC-3。通过实验排除乳酸、乙酸和过氧化氢干扰后,L. plantarum PC-3的无细胞发酵上清液(cell-free fermentation supernatant,CFS)对大肠杆菌(ATCC 8099)和金黄色葡萄球菌(ATCC 6538)仍具有抑制作用,且经胰蛋白酶、胃蛋白酶和胃蛋白酶K处理后抑菌作用下降明显,说明L. plantarum PC-3所产主要抑菌物质为蛋白类物质,初步分析该抑菌活性物质为细菌素类。L. plantarum PC-3可作为食品运输和贮藏过程中控制大肠杆菌和金黄色葡萄球菌的拮抗制剂出发菌株,能有效地防止杂菌污染,延长食品保质期。展开更多
文摘Four constituents were isolated from Rhododendron micranthum Turcz . Their structures were identified ashyperin ,astragalin ,kaempferol ,and quercetin . Kaempferol wasisolated from the plantforthe firsttime . Hyperin wasthe main analgesic active constituent.
文摘从安徽本地泡菜中筛选出一株具有抑菌活性的乳酸菌(编号为PC-3)。通过菌落形态观察、染色镜检、生理生化和分子生物学实验鉴定分析,鉴定为植物乳杆菌(Lactobacillus plantarum),并命名为Lactobacillus plantarum PC-3。通过实验排除乳酸、乙酸和过氧化氢干扰后,L. plantarum PC-3的无细胞发酵上清液(cell-free fermentation supernatant,CFS)对大肠杆菌(ATCC 8099)和金黄色葡萄球菌(ATCC 6538)仍具有抑制作用,且经胰蛋白酶、胃蛋白酶和胃蛋白酶K处理后抑菌作用下降明显,说明L. plantarum PC-3所产主要抑菌物质为蛋白类物质,初步分析该抑菌活性物质为细菌素类。L. plantarum PC-3可作为食品运输和贮藏过程中控制大肠杆菌和金黄色葡萄球菌的拮抗制剂出发菌株,能有效地防止杂菌污染,延长食品保质期。
