查询词典 ligand

The invention comprises a cyclopalladated catalyst with axial chiral binaphthyl backbone containing phosphine ligand as well as the synthesis thereof, and the application of the catalyst with cyclopalladated catalyst with axial chiral binaphthyl backbone containing phosphine ligand with a similar structure to the hetero atom norbornadiene ring cleavage reaction through an asymmetric catalytic organic boron agent.

本发明包括一类具有轴手性联萘骨架含膦配体的环钯催化剂及其合成，以及其与具有类似结构的轴手性联萘骨架含膦配体的环钯催化剂在不对称催化有机硼试剂对杂原子降冰片二烯开环的应用。

According to the effect of guanylic acid on fluorescence intensity of ligand-Cu or Fe (Ⅲ binary complex system, it is found that guanylic acid and Cu, Fe have synergic quenching effect on the fluorescence of ligand due to the formation of ternary complex.

对原始配体CPFX进行了元素分析、FT-IR、〓H-NMR、〓C-NMR、MS等手段进行了结构确证，并讨论产生这种变化的可能过程，对配合物配体间的相互作用（氢键作用、芳环堆积作用）着重进行了讨论。

The possible ligand-ligand interactions in these ternary complexes were discussed, and the structural effects of the iodo groups on the interaction were emphasized.

讨论了这些混配配合物中配体间相互作用的规律和碘的结构效应。

An isonitrile ligand, 2 methyl cyclohexylisonitrile is synthesized and a copper salt Cu(I 4BF 4 of this ligand is also prepared. The isonitrile and its copper salt are characterized by IR and elemental analysis.

合成了一种新的异腈配体 2 甲基环己基异腈及其铜络盐，并经红外光谱和元素分析等表征予以确认。

The rest positions of 〓 unit are occupied by water and an oxygen atom of carboxylates from another type of ligand. With two carboxylates of this type of ligand, two ladderlike long chains are connected to form one-dimensional ladderlike chain structure.

第二类配体中每个羧酸根的一个氧原子与水分子饱和四面体结构单元余下的位置，并连接两个梯形长链形成一维梯形链状聚合物。

Then, the multidentate amine immobilized on silica gel was used as ligand for CuCl in ATRA of CCl_4 with MMA and methyl trichloroacetate with St repeatly. The conversion and purity of the product were determined through the gas chromatography and ~1H NMR respectively. Finally, the multidentate amine immobilized on silica gel was used as ligand for CuCl in ATRP of St initiated by TCPP and MMA initiated by MMTCB. The number average molecular weights of the polymers were determined through GPC.

此多齿胺改性硅胶配体被分别多次重复用于四氯化碳与甲基丙烯酸甲酯，三氯乙酸甲酯与苯乙烯的ATRA反应中，通过气相色谱测定了原料的转化率随时间的变化，且通过核磁~1H NMR测定了产物的纯度，我们还进一步将此种多齿胺改性硅胶配体用于TCPP引发St的ATRP和MMTCB引发MMA的ATRP反应中，通过GPC测定所得聚合物的分子量。

AIM: To observe the regulative effects of different concentrations of glucose on the expressions of tumor necrosis factorrelated apoptosisinducing ligand,osteoprotegerin,and the ligand of osteoprotegerin in osteosarcoma MG63 cells,and to study the role of nonphysiological concentration of glucose in pathogenesis of diabetic osteoporosis.

目的：观察不同浓度葡萄糖环境下人成骨肉瘤MG63细胞株肿瘤坏死因子相关凋亡诱导配体及其护骨素、护骨素配体的表达，探讨糖尿病骨质疏松症的发病机制。

N Dq'^8z?1I3q AIM: To observe the regulative effects of different concentrations of glucose on the expressions of tumor necrosis factorrelated apoptosisinducing ligand,osteoprotegerin,and the ligand of osteoprotegerin in osteosarcoma MG63 cells,and to study the role of nonphysiological concentration of glucose in pathogenesis of diabetic osteoporosis.

目的：观察不同浓度葡萄糖环境下人成骨肉瘤MG63细胞株肿瘤坏死因子相关凋亡诱导配体及其护骨素、护骨素配体的表达，探讨糖尿病骨质疏松症的发病机制。

For very long time, many research groups focus on using more than a stoichiometric amount of a chiral auxiliaries to obtain high enantioselectivity. There were mainly two sorts of processes reported on highly catalytic asymmetric addition of Grignard reagents to aldehydes. The former case was to transform Grignard reagent RMgX into other organometal reagents such as R_2Zn and R-Ti derivatives via complicated procedures at extremely low temperature. The later case was to link a chiral ligand to Mg in the form of organomagnesium amides or use chiral amine ligand catalyzing the alkylation of aldehydes.

格氏试剂对醛的不对称加成的报道大多需要大量的手性助剂以获得高的光学活性，而高度催化的格氏试剂对醛的不对称加成主要通过两种途径进行：一种是把格氏试剂转化成其他的有机金属试剂如R_2Zn和R-Ti化合物再对醛进行加成，反应通常在低温下进行；另一种是利用手性镁胺作为中间体或直接用手性胺催化来完成此反应。

Subsequent ACE inhibitors were designed with a carboxyl zinc ligand (enalapril, lisinopril, quinapril, ramipril, cilazapril, perindopril) or a phosphinic acid zinc ligand.

后来的ACE抑制剂都设计了一个羧基锌配体（依那普利，赖诺普利，喹那普利，雷米普利，西拉普利，培哚普利）或是一个磷酸锌配体。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了