金属

The study of this thesis enlarges the application of rare earths metal- samarium in organic synthesis that has quite important meaning for our country having abundant rare earths resources. It promotes to explore the new use of rare earths metals in organic synthesis. There will be a great break in the theory and application of the production of carbene.

通过本研究扩大了稀土金属钐在有机合成中的应用范围，这对于我国具有丰富的稀土资源(贮量占世界总贮量的85%以上，稀土金属产量及质量占世界首位)而言，促进开发稀土金属在有机合成中的新用途，具有十分重要的意义；并在产生卡宾的理论上有所突破，填补了卡宾研究领域的空白，取得一些极具价值的学术成果。

This thesis consists of three main parts of the research work on the syntheses, structures and reactivities of the olefin-coordinated transition metal carbene and carbyne complexes. In chapter 1, on the basis of our previous research works on the reacitivites of the cationic carbyne complexes of transition metals with metalcarbonyl anions, we explored the reactions of the cationic carbyne complexes of manganese (1) and rhenium (2) with polymetalcarbonyl anions, and developed a new method for the preparations of heternuclear trimetal bridging carbyne complexes.

本论文对烯烃配位的过渡金属卡宾和卡拜络合物的合成、结构和反应性能进行了研究，主要进行了如下三方面的工作：第一章在本小组过去的研究基础上，进一步考察锰和铼的阳离子卡拜络合物1和2与羰基金属阴离子化合物的反应，用来合成异核多金属桥卡拜络合物，发展合成多金属桥卡拜络合物的新方法和新路线。

In this dissertation, we have prepared 15 new MOFs by using different organic carboxylate ligands, and analyzed their topology structures as well as explored their multifunctional properties.

本论文依据晶体工程学原理，从金属有机骨架晶体材料的功能性出发，主要研究这类化合物的合成、拓扑结构和多功能性质，旨在探索金属有机骨架晶体材料的结构多样性；并在结构研究的基础上，开发新型次级结构单元以及具有新颖拓扑结构的金属有机骨架晶体材料的设计合成与性质应用。

Three new color combinations are offered on CX and CXL, the primary colors being Cashmere Metallic, Cardinal Red Metallic and Platinum Metallic.

三种新的颜色组合，开办CX和第一百四十，暂时羊绒金属，金属和鲜红铂金属原色。

They can chelate with metal ions and then its can be determination by some analytical methods.

它与金属离子有很强的络合作用，分析化学中常用来作为金属离子的络合剂，然后用一定的分析方法来测定金属离子。

This paper is focused on the preparation, characterization of metal clusters and theircatalytic performance in the enantioselective as well as stereoselective hydrogenations. It iscomposed of the five parts as follows: Chapter 1 A review was given on the two most studied enantioselective systems—Ni/TA and Pt/cinchona system, including some recent progress.

本论文研究了铂、铱纳米金属簇在α-酮酯、α-二酮不对称氢化中的催化性能及金属离子在α-二酮立体选择性氢化中的修饰作用，主要分为以下几部分：第一章对多相不对称催化体系一Ni／TA和Pt／cinchona及其一些最新进展作了较系统的评述；同时简要介绍了纳米金属簇的特性及其在催化中的一些应用。

In order to reflect the toxicity of cadmium in the two different systems: overlying water system and watersediment coexistence system, the toxicological parameters such as metal body burden, MT and mortality in a freshwater cladoceran Daphnia magna after exposure were quantified.

选择大型溞作为受试生物，以大型溞体内金属积累量、金属硫蛋白含量和死亡率作为测试指标，考察了上覆水体系与水柱－沉积物共存体系中金属镉的毒性状况，探讨了水体沉积物中重金属的生物毒性作用机制。

In order to reflect the toxicity of cadmiumin the two different systems: overlying water system and water-sediment coexistence system, the toxicological parameters such as metal body burden, MT and mortality in a freshwater cladoceran Daphnia magna after exposure were quantified.

选择大型溞作为受试生物，以大型溞体内金属积累量、金属硫蛋白含量和死亡率作为测试指标，考察了上覆水体系与水柱-沉积物共存体系中金属镉的毒性状况，探讨了水体沉积物中重金属的生物毒性作用机制。

A white metal straight-winged spread eagle and swastika emblem was pinned to the front of the crown; below it on the band was a white metal oak leaf wreath surrounding a raised, painted metal cockade.

白色金属直翅鹰和纳粹党徽标志的传播是挂在前面的冠，低于它在一个白色的金属乐队金属帽章橡树叶花环环绕着提高，画。

It is mixed with silver, copper and tin, forming a highly durable combination to lock in the mercury.

目前在医疗中使用的金属混合物，使用汞、银、铜和锡等金属，制成耐用度较高的混合物，并将汞金属锁定其中。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。