目的:研究从丹参中提取和纯化总丹参酮的最佳工艺条件。方法:采用L9(34)正交设计,以总丹参酮和丹参酮ⅡA的提取率为考察指标,优化提取总丹参酮的工艺条件;以总丹参酮的含量为考察指标,优选纯化总丹参酮粗提物的工艺条件。结果:总丹参酮...目的:研究从丹参中提取和纯化总丹参酮的最佳工艺条件。方法:采用L9(34)正交设计,以总丹参酮和丹参酮ⅡA的提取率为考察指标,优化提取总丹参酮的工艺条件;以总丹参酮的含量为考察指标,优选纯化总丹参酮粗提物的工艺条件。结果:总丹参酮的最佳提取条件为加7倍量的90%乙醇,回流提取3次,每次提取1.5 h;最佳纯化工艺条件为加15倍量的8%碳酸钠溶液,洗涤5次,每次搅拌5 m in。结论:纯化工艺条件能使总丹参酮粗提物的含量由18.23%上升至57.29%,达到了新药申报规定的要求。该提取和纯化总丹参酮的最佳工艺条件简便易行,适用于工业化生产。展开更多
[Objective] The aim of this study was to screen bacteria strains with stable antagonistic effect against watermelon fusarium wilt from soil and investigate the biological control of watermelon fusarium wilt by applyin...[Objective] The aim of this study was to screen bacteria strains with stable antagonistic effect against watermelon fusarium wilt from soil and investigate the biological control of watermelon fusarium wilt by applying the antagonistic bacteria strains into soil.[Method] Actinomycete strains,fluorescent bacteria strains and bacillus strains were isolated from soil samples by the dilution-plate method,then its resistance was screened respectively by the improved confront culture method after colonies were purified.Finally,bacteria strains with better antagonistic effect were identified.[Result] 29 bacteria strains with stable antagonistic effect against watermelon fusarium wilt were screened from 39 soil samples,which contained 15 fluorescent bacteria strains,5 bacillus strains and 9 actinomycete strains.Furthermore,three antagonistic bacteria strains of FM2,FM3 and FM4 with the strongest antagonism were identified primarily.[Conclusion] According to cultural characteristics,morphological observation,biochemical and physiological tests,FM2 belongs to bacillus subtilis,while FM3 and FM4 belong to micrococcus.展开更多
文摘目的:研究从丹参中提取和纯化总丹参酮的最佳工艺条件。方法:采用L9(34)正交设计,以总丹参酮和丹参酮ⅡA的提取率为考察指标,优化提取总丹参酮的工艺条件;以总丹参酮的含量为考察指标,优选纯化总丹参酮粗提物的工艺条件。结果:总丹参酮的最佳提取条件为加7倍量的90%乙醇,回流提取3次,每次提取1.5 h;最佳纯化工艺条件为加15倍量的8%碳酸钠溶液,洗涤5次,每次搅拌5 m in。结论:纯化工艺条件能使总丹参酮粗提物的含量由18.23%上升至57.29%,达到了新药申报规定的要求。该提取和纯化总丹参酮的最佳工艺条件简便易行,适用于工业化生产。
基金Supported by Scientific Research and Development Fund of Hefei University of Technology(070602F)Research Funding Project for Young Teachers in Colleges of Anhui Province(2008JQ1009)~~
文摘[Objective] The aim of this study was to screen bacteria strains with stable antagonistic effect against watermelon fusarium wilt from soil and investigate the biological control of watermelon fusarium wilt by applying the antagonistic bacteria strains into soil.[Method] Actinomycete strains,fluorescent bacteria strains and bacillus strains were isolated from soil samples by the dilution-plate method,then its resistance was screened respectively by the improved confront culture method after colonies were purified.Finally,bacteria strains with better antagonistic effect were identified.[Result] 29 bacteria strains with stable antagonistic effect against watermelon fusarium wilt were screened from 39 soil samples,which contained 15 fluorescent bacteria strains,5 bacillus strains and 9 actinomycete strains.Furthermore,three antagonistic bacteria strains of FM2,FM3 and FM4 with the strongest antagonism were identified primarily.[Conclusion] According to cultural characteristics,morphological observation,biochemical and physiological tests,FM2 belongs to bacillus subtilis,while FM3 and FM4 belong to micrococcus.