食品科学 ›› 2007, Vol. 28 ›› Issue (10): 225-228.

• 工艺技术 • 上一篇    下一篇

红檵木叶抑菌活性物提取分离研究

 钟以举, 唐克华, 钟维, 黄早成, 卢成瑛   

  1. 吉首大学湖南省林产化工工程重点实验室; 吉首大学湖南省林产化工工程重点实验室 湖南张家界427000; 湖南张家界427000;
  • 出版日期:2007-10-15 发布日期:2011-11-22

Study on Extract and Separate Bacteriostatic Active Composition from Loropetalum Chinese var. rubrum Leaves

 ZHONG  Yi-Ju, TANG  Ke-Hua, ZHONG  Wei, HUANG  Zao-Cheng, LU  Cheng-Ying   

  1. Provincial Key Laboratory of Forest Production and Chemical Engineering, Jishou University, Zhangjiajie 427000, China
  • Online:2007-10-15 Published:2011-11-22

摘要: 用不同浓度乙醇作提取溶剂,采用正交试验,通过抑菌实验得到红檵木叶抑菌活性物质最佳提取条件为:60%乙醇、45℃、3h。提取物对金黄色葡萄球菌的最小抑菌浓度为12.5mg/ml,对痢疾杆菌为50mg/ml,对大肠杆菌为25mg/ml。提取液抑菌活性具热稳定性,但在碱性条件下不稳定。溶剂萃取以乙酸乙酯萃取物抑菌活性最强,硅胶柱层析和薄层层析进一步分离,得到三个抑菌活性较强的组分,化学反应和UV检测表明其属可水解鞣质类。

关键词: 红檵木叶, 抑菌活性, 柱层析, 薄层层析, 可水解鞣质

Abstract: Antibioticsubstance of Loropetalum Chinese var. rubrum leaves were extracted by the ethanol in orthogonal test. The optimum extracting conditions are: 60% ethanol , 45℃ and 3h. Extract acted on Staphylococlus aureus, Shigella dysenteroae and Escheichia coli, the MIC was 12.5 mg/ml, 50 mg/ml and 25 mg/ml respectively. Extracting solution was not steady in the alkaline environment, but was steady in the hi-temp. Antibioticsubstance could be extracted by the ethyl acetatehe three bacteriostatic active composition were isolated with silica gel chromatography and thin-layer chromatography (TLC) in the extract of ethyl acetate. The result of chemical reaction and the examination of UV showed that extracts are hydrolysablet annin.

Key words: Loropetalum Chinese var. rubrum leaves, bacteriostatic activity, column chromatography, TLC, hydrolysablet annin