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HPLC-DAD鉴别皂角刺中掺入野皂角刺的方法研究
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作者 刘小燕 夏巧红 +3 位作者 宋平顺 张义福 贺军权 倪琳 《现代中药研究与实践》 CAS 2021年第4期15-19,共5页
目的建立皂角刺中非法掺入野皂角刺的高效液相色谱鉴别法。方法取不同来源产地的皂角刺与野皂角刺,采用HPLC-DAD法测定其提取物化学组分,利用阿魏酸对照品作为内标物,以色谱相对保留时间及紫外光谱进行联合定性,检测HPLC图谱中野皂角刺... 目的建立皂角刺中非法掺入野皂角刺的高效液相色谱鉴别法。方法取不同来源产地的皂角刺与野皂角刺,采用HPLC-DAD法测定其提取物化学组分,利用阿魏酸对照品作为内标物,以色谱相对保留时间及紫外光谱进行联合定性,检测HPLC图谱中野皂角刺特有峰,建立皂角刺中掺入野皂角刺检验方法,并进行方法学考察。结果伪品野皂角刺中检出一特有峰,其相对于阿魏酸的保留时间为1.43,正品皂角刺药材及饮片中均未检出该组份。方法精密度、重复性、稳定性、耐用性均良好。结论建立的方法操作简便,专属性强,可用于快速筛查皂角刺中掺入野皂角刺的情况,为皂角刺的质量控制提供实验依据。 展开更多
关键词 皂角刺 野皂角刺 阿魏酸 特有峰 HPLC-DAD
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The Structural Behavior of Low/Medium/High Rise Concrete Office Buildings in Kuwait 被引量:1
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作者 Tarek A. Awida 《Journal of Civil Engineering and Architecture》 2010年第10期59-65,共7页
The main concern of this paper is to provide an extensive study for the structural behavior of low/medium/high rise office buildings aiming to deepen structure and architect designers understanding for such type of bu... The main concern of this paper is to provide an extensive study for the structural behavior of low/medium/high rise office buildings aiming to deepen structure and architect designers understanding for such type of buildings. The study is performed on reinforced concrete and emphasized only on Kuwait city conditions for wind. Regular layout plan building with different heights ranging from five to fifty typical office stories are investigated in this study. Three dimensional finite element techniques through ETABS software are used in conducting analysis for structures presented here-in. A serviceability study is performed to ensure that buildings have sufficient stability to limit lateral drift and peak acceleration within the acceptable range of occupancy comfort. In addition, an ultimate strength study is carried out to design and verify that all the structural elements are designed to withstand factored gravity and lateral loadings in a safe manner according to the international building codes. The building slenderness ratio and the building core size and location are the studied parameters since they are the key drivers for the efficient structural design. Analysis results are presented and discussed and finally conclusions are summarized as guidelines for designers of concrete office buildings in Kuwait. 展开更多
关键词 Low/medium/high-rise structures office buildings finite element reinforced concrete analysis and design.
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