Shi-Yue Zhang

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BACKGROUND During August 2011-February 2012, an outbreak of type Π circulating vaccine-derived poliovirus (cVDPVs) occurred in Sichuan Province, China. METHODS A field investigation of the outbreak was conducted to characterize outbreak isolates and to guide emergency response. Sequence analysis of poliovirus capsid protein VP1 was performed to determine(More)
Counter-current Chromatography (CCC) has gradually become a popular method for preparative separation, especially in natural product isolation. As an effective separation method, one-dimensional (1D) CCC often results in insufficiently resolved peaks, due to limitations in the separation efficiency and peak capacity in an equipment. Therefore, two(More)
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