铑

Rhodium-catalyzed asymmetric 1,4-conjugate addition reaction is one of the most efficient methods for the carbon-carbon bond formation.

铑催化不对称1，4-共轭加成反应是一种非常有效的碳—碳键形成方法。

Black calfskin leather bracelet with Jet Crystal Mesh; faceted rhodium-plated buckle.

黑色小牛皮皮革手链与Jet水晶网；镀铑金扣。

Platinum and rhodium catalyst are applied largely and widely, because these two kinds of catalysts are so efficient for hydrosilylation that they were researched since a long time ago. Very recently, N-heterocyclic carbene Pt and N-heterocyclic carbene Rh complexes were used as catalysts in hydrosilylation.

最近，铂和铑的卡宾金属配合物作为催化剂应用于各种不饱和化合物的硅氢加成反应，表现出非常优良的催化性能和稳定的物理化学性质，受到了化学工作者们广泛的关注。

In the asymmetric hydrogenation of ethyl pyruvate catalyzed by 0 5% Rh/PVP TiO 2, the chiral modifier cinchonidine not only induces the enantioselectivity, but also accelerates the reaction rate greatly.

研究了辛可尼定作手性修饰剂修饰的负载型纳米铑簇合物催化剂(0 5 %Rh/PVP TiO2 )催化丙酮酸乙酯不对称氢化反应，在该反应中手性修饰剂辛可尼定不仅具有对产物生成的手性诱导作用，而且对反应具有明显加速作用；在优化反应条件后，反应的TOF和对映选择性分别可以达到 5 8 0min-1和

RH Codrington's study The Melanesians (1891), in which he described the meaning of Mana as a supernatural power or influence experienced by the Melanesians, has provided a basis for other scholars to explain the origin and interpretation of primitive religion as rooted in the experience by primitive peoples of the dynamic power of nature.

铑科德林顿的研究美拉尼西亚人（ 1891年），他在其中所描述的含义的Mana作为一个超自然的力量或影响，经历了由美拉尼西亚人，提供了一个基础，为其他学者解释的起源与诠释原始宗教作为植根于体验原始民族的动态自然的力量。

Set of clear crystal inkwell with quill, book, diploma and graduation cap; rhodium-plated details.

套清楚水晶墨水池与纤管，书，文凭和毕业盖帽；铑被镀的细节。

Lanthanides belong to the sixth cycle of the periodic table Ⅲ B family, are all solid metal, they are La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, holmium, erbium, thulium, ytterbium, and lutetium were 15 kinds of metals and their periphery are two layers of electronic 5d16s2, while the peripheral third layer f orbital but never zero to 14, so the external electronic structure of 4f0-145d16s2, and therefore these elements in oxidation number are to 3, very close chemical properties, extraction, when it is difficult to separate them they are mostly multi-element mineral mix, more difficult to increase refining, and their atomic number of 57-71, one by one to increase the number of protons the nucleus, and thus extranuclear electron of gravity is also growing, so that atomic radius decreases with increasing atomic number Z, which makes lanthanides contraction, ionic radius is also reduced, which also makes Zr, Hf, Nb and Ta, Mo and W, the atom and ionic radius very close to each other they also determine a similar nature, resulting in difficult separation, also the tribe Ⅷ of the fifth cycle, ruthenium, rhodium, palladium, and the sixth cycle, osmium, iridium, platinum is very similar in nature, thus The six elements, said platinum group elements.

镧系元素属于周期表第六周期中ⅢB族，全部是固体金属，它们是镧、铈、镨、钕、钷、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥共十五种金属元素，它们的外围两层的电子均是5d16s2，而外围第三层的f轨道电子却从零增加到14个，所以外围电子结构为4f0－145d16s2，而使这些元素氧化数均为＋3，化学性质极为接近，提炼时很难分开，它们的矿石又大多是多种元素混在一起的，更增加提纯难度，它们的原子序数为57－71，核内质子数逐个增加，因而对核外电子引力也不断增强，使原子半径随原子序数Z增加而减小，这就使镧系元素收缩、离子半径也缩小，这也使得Zr和Hf，Nb和Ta、Mo和W等原子和离子半径都很接近、也决定了它们彼此性质类似，以致难以分离、也使第Ⅷ族中第五周期的钌、铑、钯和第六周期的锇、铱、铂在性质上极为相似，因而称这六个元素为铂系元素。

Using fire assay combined with neutron activation analysis, rhodium in 5 certified reference materials were measured.

简述了铅试金和镍锍试金富集地质样品中痕量铑的分离方法，并结合中子活化分析测量了5种地质标准物质中铑的含量。

JP2Rhodium of 10-9 level was accurately measured by NAA combined with lead fire assay, and 10－10 level was accurately measured by NAA combined with nickel sulfide fire assay.

铅试金中子活化法可实现10－9铑含量的准确测量，镍锍试金中子活化法可实现10－10铑含量的准确测量。

Treatment for women with rhesus factor disease (where the Rh blood groups of the mother and baby do not match) is essential. Without it, if the mother develops antibodies to the Rh positive baby, any subsequent Rh positive babies could be stillborn.

治疗妇女与恒河猴因子疾病（如Rh血型组的母亲和婴儿不匹配）是必不可少的，没有它，如果母亲抗体的发展，向铑积极的婴儿，随后的任何铑积极的婴儿可死产。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。