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- The results showed that MgO has a certain strength of Lewis base,and the adsorption of BATE on MgO is monomolecular chemical adsorption. 结果表明MgO有一定的路易斯碱强度,与硼酸三甲酯之间的吸附是单分子层化学吸附。
- There existed both Lewis acid sites(Fe~(3+),Mo~(6+)) and Lewis base sites(oxygen of Mo=O and Mo-O-Fe bond) on the surface of the catalysts. 催化剂表面由Lewis碱位(MoO键的端氧和Fe-O-Mo键中的桥氧)及Lewis酸位构成。
- FePO 4 and AlPO 4 distribute at intervals, and there exist Lewis base sites (P=O and P-O-Fe) and Lewis acid sites (Fe 3+ and Al 3+) on the catalyst surface. FePO4 和AlPO4 间隔分布在催化剂表面 ;形成Lewis碱位 (P =O ;P O Fe)和Lewis酸位 (Fe3 + ;Al3 + ) .
- The experimental results pointed out that the three kinds of active sites exist on the surface of the catalysts: Metallic site Cu, Lewis acid sites V~(5+) and Ti~(4+), Lewis base sites bridge O in V-O-Ti and terminal O in V=O. 实验结果表明:在Cu/V2O5-TiO2催化剂表面存在金属位Cu、Lewis酸位V5+和Ti4+以及Lewis碱位V-O-Ti的桥氧和V=O的端氧三类活性中心;
- In the Lewis electron theory (see acid-base theory), advanced by Gilbert N.Lewis in 1923, nucleophiles are by definition Lewis bases. 在1923年由路易斯提出的电子理论中(参阅acid-base theory),亲核试剂是由路易斯定义的。
- Asymmetric Lewis Base Catalysis in Hydrogen Transfer Reduction 手性路易斯碱催化的不对称氢转移还原反应
- This paper introduces the complexation and dissociation of different Lewis bases with active species in the area of anionic polymerization reported in literatures and elucidates their applications. 介绍和评述了文献中有关路易氏碱在阴离子聚合中对活性中心的络合和解缔作用。
- The guest speaker will be our old friend John Lewis. 特邀演讲者将是我们的老朋友约翰。路易斯。
- He was now in the measures of Lewis XIV. 他此刻正与路易十四共商大计。
- It was adapted from a novel by Sinclair Lewis. 它是根据辛克莱·刘易斯的一部小说改写的。
- The runner was retired put out at first base. 跑垒者于第一垒上被刺杀出局。
- The runner went to second base on a wild pitch. 一记瞎设让跑垒员跑上了第二垒。
- You cannot enter a military base without a permit. 无通行证者不得擅入军事基地。
- Her heavy industry rests on a broad and firm base. 它的重工业有广泛坚实的基础。
- He caught me off base with that question. 他的问题猝然把我给问倒了。
- The bombers swooped on the air base. 轰炸机突袭空军基地。
- Sinclair Lewis was stormy petrel in his life as in his books. 辛克莱。刘易斯在他的生活中也像他的书中一样是个制造麻烦的人。
- Many languages have Latin as their base. 许多语言都以拉丁语为基础。
- His base conduct was condemned by everyone. 他的无耻行为受到所有人的谴责。
- His idea is completely off base. 他的想法大错特错。