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In the synthesis process of ligands and their rare earth complexes, metal lithium is used to substitute for n-butyllithium, such as the synthesis of fluorenyl lithium, piperonal dimethyl acetal lithium, and bis (9-fluorenyl) silylene lithium.

合成配体和配合物的中间体均采用金属锂代替正丁基锂,如芴锂、溴代胡椒醛二甲基缩醛基锂盐、甲基苯基双芴基硅烷双锂盐的制备,方法简单,操作简便,副反应少,且锂盐的浓度和用量易于控制。

These ligands were characterized by melting point, elementary analysis, mass spectrometry and nuclear magnetic resonance, and showed high purity.

所合成的配体经熔点、元素分析、MS和NMR等确证了结构,并表明其具有较高的纯度。

However, none of current molecular mechanical force fields can exactly treat the polarization effects in protein-protein and protein-ligand binding, even for polarizable force fields.

然而,目前还没有任何一种分子力学力场能够处理蛋白质和蛋白质或者蛋白质和配体之间的极化效应。

This part introduce microporous zeolite compounds , especially the zeolite-like compounds which were developed by Yaghi et al by using thermally stable aromatic polyacid and metal ions as second building unit .

这部分介绍了微孔的类分子筛化合物,特别是 Yaghi 等利用刚性和热稳性本身比较好的芳香多酸和多碱配体和金属离子作为建筑单元发展的的第三代类分子筛,即:金属—有机框架。

And includes the following aspect: 1 The synthesis of dendritic polyvalent glycol-conjugates ligand were concluded which can provide a new method to find new medicine.

本文包括以下几个部分: 1 合成树枝状多效价糖苷配体是找到新的抗感染、抗病毒、抗HIV药物以及人体疫苗等的重要途径。

In view of separation, the separation of porphyrin complexes with different central metal ions is more difficult.

从分离的角度看,不同金属离子与同一个卟啉配体所形成的配合物之间的分离相对要难一些。

RESULTS: RANKL immunostaining was strong positive in the root of incisor teeth.

结果:切牙牙根周围核因子κB受体活化剂配体蛋白染色强阳性。

And the mechanism of ATRP is discussed from the view of complex-catalytic reaction. It is deduced that the active center in ATRP is not pure radical but complex active center, which maybe a complex with radical and complex ion. The structure of active center may have a "bridge"structure formed through propaganating radical and transition metal ion, and the active center exists in a"cage"generated by ligand-transition metal ion-organic halide and monomer or solvent.

论文运用基团贡献理论对一些实验现象和结果进行了讨论和分析,并结合研究结果对络合催化引发原子转移自由基聚合反应的机理进行了初步的探讨,认为:过渡金属化合物与有机配体参与的络合催化引发原子转移自由基聚合反应中,聚合反应的活性中心不是纯粹的自由基活性中心,而是与过渡金属相结合的、有着某种"笼"结构存在的复合式活性中心,同时该活性中心以自由基特性为主,同时兼具某种程度的其它活性中心特征(如阳离子和络合聚合活性中心)。

In Chapter 2, construction, structures and properties of sixteen one-, two-, and three-dimensional coordination polymers self-assembled by 4,4'-bipyridine (4,4'-bpy) and pyrazine with metal salts have been described.

第二章描述了16种含4,4'-联吡啶和吡嗪桥连配体的聚合金属配合物超分子的构筑、结构及性质。通过改变酸度、溶剂体系及各种反离子等条件,分别得到不同层次和维数的、具有各种孔穴或通道结构的聚合配合物。

The influences of different organic bridging ligands pyrazine,2-pyrazinecarboxylate,4,4′-bipyridine and 1,2-bis(4-pyridyl)ethane on the cobalt vanadate system were explored.

同时还研究了不同的有机桥式配体吡嗪、2-吡嗪羧酸、4,4′-联吡啶和1,2-联(4-吡啶基)乙烷在钴钒体系中的作用。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。