排序方式: 共有37条查询结果,搜索用时 5 毫秒
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采用高压微波辅助提取法提取牛黄上清丸中的黄芩苷, 利用蜜丸的粘性, 将蜜丸涂敷在自制毛玻璃片表面后, 置于高压微波提取装置中进行提取, 同时与直接将蜜丸切块置于微波装置进行了对比. 相似文献
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同行评议中的“非共识”问题研究 总被引:2,自引:0,他引:2
同行评议中的“非共识”问题研究Studieson“Non-Unanimity”inPeers'Review刘求实,丁厚德(清华大学科技与社会研究所,北京100084)王玉堂(国家自然科学基金委员会,北京100083)同行评议是科学界对科研项目进行评审... 相似文献
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A new method, non-polar solvent microwave-assisted extraction (NPSMAE), was applied to the extraction of essential oil from Zingiber officinale Rosc. in closed-vessel system. By adding microwave absorption mediumcarbonyl iron powders (CIP) into extraction system, the essential oil was extracted by the non-polar solvent (ether) which can be heated by CIP. The constituents of essential oil obtained by NPSMAE were comparable with those obtained by hydrodistillation (HD) by GC-MS analysis, which indicates that NPSMAE is a feasible way to extract essential oil from dried plant materials. The NPSMAE took much less extraction time (5 min) than HD (180 min), and its extraction efficiency was much higher than that of conventional polar solvent microwave-assisted extraction (PSMAE) and mixed solvent microwave-assisted extraction (MSMAE). It can be a good alternative for the extraction of volatile constituents from dried plant samples. 相似文献
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