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实时直接分析-串联质谱法(DART-MS/MS)快速检测吐根中生物碱
串联质谱 吐根 生物碱 直接离子化(常压离子化)
2012/5/22
在未经前处理和色谱分离的情况下应用实时直接分析-串联质谱法检测吐根生物碱。方法: 在优化的条件下全扫描采集药材, 茎及叶的DART-MS(direct analysis in real time,DART)特征图谱, 并对生物碱进行二级质谱确证,采用多反应监测模式通过测定样品表面待测物的质谱峰强度来计算其在样品中的平均含量。结果: 药材和茎的图谱中均有明显的吐根碱和吐根酚碱的质子化离子峰m/z 4...
Affordable antibiotic halves the HIV death rate on treatment, DART trial shows
Affordable antibiotic the HIV death rate treatment DART trial
2010/4/21
A safe, cheap and widely available antibiotic could save the lives of thousands of people starting anti-retroviral treatment for HIV in Africa and other developing countries. The findings come from a ...