配位

Distribution and coordination environment of lanthanum in internodal cells of Chara have been determined by inductively coupled plasma-mass spectrometry and X-ray absorption spectroscopy.

利用电感耦合等离子体质谱和X射线吸收谱研究了稀土元素镧在轮藻节间细胞中的分布和配位环境。

Oxidation of alkenes catalyzed by metalloporphyrin imidazolium salts in the presence of N-hydroxyphthalimide and isobutyraldehyde as co-catalysts provided the epoxidation product at room temperature. And the solvent with a weak coordinating ability such as acetonitrile gave the best result.

金属紫质咪唑盐於烯类的氧化催化反应上，若与NHPI及异丁醛共催化，可在室温进行环氧化反应，反应溶剂选择具有弱配位能力的乙腈，则可获得较佳结果。

The hybrid composite PW11Co/PAMAM was characterized by FT-IR, UV-Vis diffuse reflectance spectra, XPS, XRD and TG/DTA, indicating that the PW11Co was chemically anchored to PAMAM. The morphologies of the title composite were characterized by scanning electron microscopy and transmission electron microscopy. The catalytic activity was evaluated by oxidation of isobutyraldehyde to isobutyric acid in MeCN under mild conditions (20 ℃, ambient pressure), showing that the title compound is a more effective and recoverable catalyst than corresponding PW11Co.

通过FT-IR、DR-UV-Vis、XRD、TEM、SEM、TG/DTA等手段对其进行了表征，并考察了其对异丁醛转化异丁酸的催化活性，实验结果表明，多金属氧酸盐通过配位键与聚酰胺-胺作用形成的无机-有机复合物可望成为一种催化活性高且易于分离和重复使用的多相催化剂。

A coordination polymer, Zn2(HINA=Isonicotinic acid) was prepared by a solid state reaction of Zn(CH3COO)2·4H2O and HINA at lower heating temperature.

用低热固相合成法制备了配位聚合物Zn2，并用X射线粉末衍射，SEM等方法对产物进行了表征。

Two novel coordination polymers, n (1) and {[Mn3222]·3H2O} n (2)( m -H2tpha=isophthalic acid, phen=1,10-phenanthroline, bipy=2,2′-bipyridine) were synthesized by hydrothermal method.

采用水热方法合成了2种结构新颖的Mn配位聚合物， n (1)，{[Mn3222]·3H2O} n (2)，( m -H2tpha=间苯二甲酸，phen=1，10-邻菲咯啉，bipy=2，2′-联吡啶)。

In conclusion, a catechol moiety is presumably to be essential for its activity and substitution of the p-hydroxybenzyl group at C-1 position with correct stereochemistry in the isoquinoline molecule makes a great contribution to the activation of beta adrenergic receptors.

本实验初步结果发现，对於去甲基乌药碱分子之药效，catechol基是必备无疑；而异喹啉环的碳－1位置上取代的p-hydroxybenzyl基对於药效有非常大的影响；至於其立体化学的配位是有立体选择性的。

In addition, the complex of Rb with energic materials NTO was also studied, and many important achivements were gotted. Because these complex compounds are significant to the new sensitive dynamite and energitic katalyst, these results were receiving widely attentions from colleagues in our nation as well as in the world.

与此同时，对Rb、Cs等稀碱元素与NTO等含能材料的配位作用也进行了系统研究，取得了一系列重要的研究成果，由于这些配合物在未来新型高能纯感炸药和含能催化剂中具有重要作用，因而引起国内同行的广泛关注。

After As in WO3 is dissolved with NaOH solution, WO3 is coordinated by citric acid. In HCl medium, As is reduced to lwo valency As by KI and then low valency Asis reduced to gas AsH3 by SnO2 and metal Zn. After that, DDTC-Ag solution is applled as absorbent for colorimetric determinhtion.

用氢氧化钠溶液溶出三氧化钨中的砷之后以柠檬酸配位三氧化钨，在盐酸介质中用碘化钾将砷还原成低价砷，再用二氯化锡和金属锌将低价砷还原成砷化氢气体，以DDTC-Ag溶液吸收进行比色测定。

Basal leaves petiolate, rosulate or not, entire, dentate, or lyrately pinnatifid.

具叶柄的基生叶，与否莲座状，全缘，配位基，或lyrately。

The total of 36 compounds were characterized by X-ray single crystal diffraction, EA, TG, IR, luminescence, adsorption, XPS, powder XRD, M〓ssbauer spectra, EPR, magnetical measurements.

本论文利用水热法，成功设计和合成出三个系列Ln-M(M=Mn〓，Fe〓，Ag〓)共23个未见文献报道的稀土—过渡混合金属配位聚合物，同时也得到了结构新颖的仅含稀土或两种不同过渡金属的从一维到三维的聚合物13个，并对它们进行了结构、元素分析、热重分析、红外光谱、荧光、吸附、磁性、光电子能谱、粉末衍射和M〓ssbauer谱等表征。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。