四氧化锇

四氧化锇是一种贵而毒性大的试剂。

Osmium tetroxide is an expensive reagent with great toxicity .

该反应所用的催化剂是由四氧化锇与手性配体配位形成的。

The chiral catalysts employed in the AD reactions are complexes of osmium tetroxide with chiral ligands .

本文介绍一种用于提高结晶高聚物PET和PBT电子显微图象衬度的丙烯胺四氧化锇染色方法。通过列举的照片，可以直接观察到结晶PET和PBT的两相结构晶区和无定形区。

A staining method with allylamine and Osmium tetroxide for the analysis of crystalline polymer PET and PBT is presented in this paper .

采用通用聚苯乙烯（GPPS）制备了四氧化锇微胶囊。采用溶剂挥发法，分析了反应体系中溶剂、温度、分散剂等各条件对实验结果的影响，并以此进行了初步筛选。

Preparation of microencapsulated osmium tetraoxide from GPPS was reported , and effect of solvent , temperature and dispersant was analyzed .

通用聚苯乙烯制备四氧化锇微胶囊的初步研究

Initial Study on the Preparation of Microencapsulated Osmium Tetraoxide from GPPS

可是，粉末状的锇，在常温下就会逐渐被氧化，并且生成四氧化锇。

But , the powdery osmium , gradually will be oxidized under the normal temperature , and production perosmic anhydride .

为了解决这一问题，国外有关研究小组探索了多种回收手性配体的方法，近期还报道了一些回收四氧化锇方面的工作。

To solve this problem , several methods have been introduced for the recovery and reuse of the ligands and osmium tetroxide .

采用冷冻超薄切片，四氧化锇染色制备样品，用透射电子显微镜观察，研究了丁苯橡胶/高压聚乙烯（SBR/LDPE）共混物的微观相结构形态。

The microstructural morphology of SBR / LDPE blends was studied by means of direct observation of cooling ultrathin sections under the transmission electron microscope using osmium tetraoxide staining .

方法取左心室壁，经四氧化锇细胞浸渍和氢氧化钠细胞浸渍方法处理，在扫描电镜下观察。

Methods After treating the sample of the myocardium from the left ventricle of SHR and WKY with OsO 4 and NaOH cell maceration method , it was observed under scanning electron microscope .

本文介绍催化剂量的四氧化锇在立体选择性高的烯烃氧化反应中的应用，为四氧化锇在有机合成中的应用，开辟了新的途径。

Here we introduced the successful application of catalytic amount of osmium tetroxide in the oxidation of alkenes with good stereoselectivity . This provides a new route for osmium tetroxide in its application in organic synthesis .