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- polyhedral borane 多面体硼氢化合物
- A polyhedron, such as a cube, that has six faces. 六面体一个多面体，如有六个面的立方体
- A polyhedron with eight plane surfaces. 八面体有八个面的多面体
- Something shaped like this polyhedron. 角锥状物形状象这种多面体的东西
- A polyhedron,such as a cube,that has six faces. 六面体一个多面体，如有六个面的立方体
- The small polyhedron is the struggle or changes? 小小的多面体是斗争还是改变？
- Joining two vertices of a polyhedron not in the same face. 对顶的连接多面体任意两个不在同一面上的顶点直线
- To erect (such a configuration) around a polygon or polyhedron. 确定(这样一个结构)围绕一个多边形或多面体.
- Virions may be polyhedral or helical and vary greatly in size. 其形状有多面体形和螺旋形，其体积大小多变。
- A point on a polyhedron common to three or more sides. 顶点共有三个或者三个以上边的多面体的顶点
- This paper proposes a new approach to robust polyhedral Boolean set operations. 提出一种可靠的多面体布尔集合运算方案。
- A polyhedron all of whose vertices lie in one of two parallel planes. 拟柱体其所有顶点都在两个平行平面内的多面体
- This paper indroduced the synthesis methed of norfloxacin by borane compound.The product had high quality and good yield(62 %). 介绍了硼螯化合物合成诺氟沙星的方法,收率高(总收率62%25以上)。
- The smallest unit that takes part in the corrosion is Bernal polyhedron. 非晶合金基体在亚微观尺度下仍具有极高的均匀腐蚀程度。
- Asymmetric borane reduction of prochiral ketones is a good process to the synthesis of enantiomerically enriched secondary alcohols. 硼烷对前手性酮的不对称还原是合成手性仲醇的重要方法。
- The asymmetric reduction of ketosulfone with borane catalyzed by oxazaborolidine is computed by means of the semi-empirical MNDO method. 对恶唑硼烷催化前手性酮砜不对称还原反应进行了半经验MNDO研究。
- The borane modified by chiral oxazoborolidines enantioselectively reduced aliphatic and aromatic ketones to yield sec-alcohols with 100% yield and medium to high optical yields. 硼烷-手性(口恶)唑硼烷-还原体系能将脂肪酮和芳香酮还原为仲醇,化学还原收率町达100%25,光学收率也比较高。
- Using 10 as the catalyst, six prochiral ketones were reduced enantioselectively with borane and the results were compared with those with 1,1- diphenylprolinol as catalys. 用10催化6种前手性酮的不对称硼烷还原反应,其结果与(S)-二苯基脯氨醇催化的同一反应的结果进行了对比。
- The formation of polyhedral cages and clusters has only recently been recognized as an important and widespread phenomenon. 多面体的笼状和簇状结构的形成只是最近才被认为是一种重要而又普通的现象。
- Compared with the pure pitches, pyridine borane modified pitches had higher softening points, carbon yields and PI fraction content at the same reaction conditions. 在同一反应条件下,体系有无吡啶硼烷,所得结果有显著差别。吡啶硼烷改性系列的软化点、残炭值及PI组份的含量均明显高于纯沥青系列。
