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The preparation of chiral sulfoxides and their applications in organic synthesis are reviewed.
中文意思:
摘要本文对手性亚碸的制备及其在不对称反应和天然产物合成中的应用进行了综述。


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The preparation methods of quaternary ammonium salt of chitosan at home and abroad, meanwhile were introduced, and heir advantages and shortcomings were compared. 摘要对目前国内外壳聚糖季铵盐的制备方法加以介绍,并比较了它们的优缺点。
The preparation methods with shapes of sphere, needle, spindle, flake, dumbbell and olive etc were mainly introduced. 重点介绍了球状、针状、纺锤状、片状、哑铃状、橄榄状等不同形貌超细碳酸锶粒子的制备方法。
The preparation methods, reaction mechanism and properties of poly(malic acid) synthesized by direct polycondensation are reviewed, and the prospects in this field are also introduced. 作者综述了直接聚合法合成聚苹果酸的方法、反应机理及性质,并展望了直接聚合法合成聚苹果酸的前景。
The preparation of a man a la suckling pig is grotesque yet impossible to turn away from. 准备一道烤活人大餐是闻所未闻见所未见的,然而却不那么可能转过脸不看。
The preparation of cardioplegic solution should meet the following requirements: ①a proper concentration of potassium must be maintained; ②all principal electrolytes in the myocardium should be contained;③an appropriate asmolarity should be sustained, and 心脏停搏液的配置必须符合下列要求:①保持适当的钾离子浓度;②含有正常心肌所含有的主要电解质;③维持适当的渗透压④溶液必须易于配制与稳定。
The preparation of chiral sulfoxides and their applications in organic synthesis are reviewed. 摘要本文对手性亚碸的制备及其在不对称反应和天然产物合成中的应用进行了综述。
The preparation of conductive fibers with playaniline is summarized.It is pointed out that the conductive fiber produced by belending a suitable organic solvent, the doped polyaniline and a matrix polymer to wet spinning will have a very bright future. 指出选择合适的有机溶剂与掺杂后的聚苯胺和母体高聚物进行共混纺丝,所得导电纤维具有良好的发展前景。
The preparation of manuscript for printing by the projection of images of type characters on photographic film, which is then used to make printing plates. 照相排版(法)通过在摄影卷上投射各种类型符号的影像来准备用于印刷的手稿,然后用其来制作印板
The preparation of metal-supported mullite and ZrO2/BaTiO3 ceramic membranes was studied.The influences of ceramic composition,sintering temperature and carbon content on the properties of ceramic materials(porosity,pore diameter and strength,etc.)were in 研究金属支撑平板陶瓷膜的制备工艺技术,陶瓷膜的组成、烧成温度、碳含量对材料性能(孔隙率、孔径、强度等)的影响,比较几种材料的陶瓷隔膜碱蚀量与电解实验结果。
The preparation of porous anodic alumina film is simplified because of the two-step anodic oxidation method that eliminates the influence of disfigurement inside and on the surface of aluminium. 其原因是两步阳极氧化法可以消除铝的内部结构及表面缺陷对多孔氧化铝膜有序性的影响。
The preparation of the meals is your job. 做饭是你分内之事.
 
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