查询词典 speculum metal

Organozinc reagents are an important type of organometallics in organic synthesis, which can undergo transformation with a variety of transition metal salts leading to new transition metal compounds.

中文摘要：有机锌试剂是一类优良的有机金属试剂，由于反应活性较低，很多活性官能团都可以存在于这类金属试剂中。

There has been no published clinical evidence to show that today's CoCr metal-on-metal articulating surfaces have the osteolytic effect on bone that earlier polyethylene devices had.

目前还没有出版的临床证据表明，今天的CoCr金属对金属表面有阐明影响骨溶骨早些时候聚乙烯装置。

A piece of hot metal sufficient to slightly overfill the die shape is placed in the bottom die, and the top die is forced against it, so that the metal takes the internal shape of the die.

将一块大小足以充填模腔并能稍有溢出的加热金属放入底模，并将顶模加压合拢，这块金属便获得该模腔的形状。

In the thesis, a series of novel single and multi-armed oxadiazole bridging ligands and pyridyl-4, 5-imidazole dicarboxylic acid ligands have been synthesized. The coordination chemistry of these novel ligands with transition metal ions was investigated. In addition, two 1, 3, 4-oxadiazole bridging ligands end-capped by chelating Schiff-base coordination sites have been designed and synthesized. The coordination chemistry based on one of the two ligands with metal ions was primarily investigated.

本文报道了一系列新颖的含1， 3， 4-Oxadiazole杂环的单臂及多臂有机配体，研究了它们与过渡金属离子的配位反应化学；合成了吡啶基-4，5-咪唑二羧酸有机配体，研究了它们在水热条件下与过渡金属离子的配位反应化学；另外，还合成了1， 3， 4-Oxadiazloe杂环桥联的双Schiff-base有机配体，初步探讨了其与过渡金属离子的配位反应化学。

This research on spectral properties and crystallization stability of Er3+-doped heavy metal oxyfluoride glasses and upconversion luminescence of rare earth-doped heavy metal oxyhalide glasses lay a foundation for the potential use of broadband Er3+-doped fiber amplifier, blue and green lasers.

通过对掺Er3+重金属氧氟玻璃的光谱性质和析晶稳定性研究以及稀土离子掺杂重金属氧卤玻璃的上转换发光研究，为其在宽带掺Er3+光纤放大器和蓝绿光波段激光器中的潜在应用提供基础。

The author introduces the character of low melting point alloy and its applications in sheet metal forming, discusses the choice of the patternmaking material, contrasts the two mould-casting technologies, points out the issues in design of technology and mold, and taking the representative large sheet metal forming for example, specifies the compose and character of the die structure.

简要介绍了低熔点合金模具的特点及其在板料冲压工艺中的应用，对比介绍了两种铸模工艺，指出了工艺及模具设计时应注意的问题，并以典型大型薄板拉深成形模具为例，详细论述了低熔点合金冲压模具的组成及结构特点。

After enter to environment and occur complicated chemistry process, heavy metal may become many kinds of pollutions which be in different shape and different struction. For example, in soil, heavy metal can be differentiated five shapes generally, namely, dissolved, permutable by feeble permutoid, permutable by strong permutoid, original mineral, secondary mineral.

重金属排入环境后，有复杂的化学过程，形成多样化的形态或结构的污染物，如土壤中的重金属离子或类金属离子可分为五种形态：①水溶态的；②弱代换剂可代换的；③强代换剂提取的；④次生矿物中的；⑤原生矿物中的。

In order to improve the electrocatalytic activity of the anode in the Direct Methanol Feul Cell, three kinds of transition metal substituted phosphomolybdic acid modified platinum electrodes were prepared, and the electrochemical behavior in the sulphuric acid solution of transition metal substituted phosphomolybdic acid modified platinum electrodes and their electrocatalytic effects of methanol oxidation were studyed. The anti-poison effect to carbon monoxide of the prepared electrodes were studied by the carbon monoxide adsorbing.

为了提高直接甲醇燃料电池阳极催化活性，本文研究了三种过渡金属取代磷钼酸修饰铂电极在硫酸溶液中的电化学行为及对甲醇的电催化氧化作用，并利用一氧化碳吸附实验评价了三种过渡金属取代磷钼酸修饰铂电极的抗一氧化碳毒化性能。

The results showed that Pb, Cd and Cu in the leaves of plants were positively related to their concentration in air significantly. The content of heavy metal in plant leaves was obviously associated with the heavy metal properties, pollution conditions and tree species. Platanus hispanica had a higher accumulation in Pb, While Populus deltoides in Cd and Cu.

研究表明，植物叶片中重金属Pb、Cd和Cu的累积量与大气中Pb、Cd和Cu的相对含量呈显著正相关；所调查绿化树种叶片的重金属含量因重金属种类、采样区和树种的不同具有明显差异，悬铃木叶片累积Pb的能力最强，而杨树叶片对Cd和Cu的累积能力最强。

The invention discloses anti-collision elastic material, which mainly consists of epoxy resin, polybasic amine curing agent, metal powder and slate powder enhanced particle, and the weight proportion of each component is as follows: epoxy resin of 25 to 30 parts, polybasic amine curing agent of 10 to 16 parts, metal powder of 42 to 45 parts and slate powder enhanced particle of 54 to 58 parts.

本发明公开了一种防撞击的弹性材料，其主要成分有环氧树脂和多元胺类固化剂，以及金属粉和石粉增强粒子，各组分的重量配比是：环氧树脂25～30，多胺类固化剂10～16，金属粉42～45，石粉增强粒子54～58。

The Porsche Owner: But it's my car!

可，这是我的车呀。

LOX_83}{Oh, another bunch of wackos.

{LOX_83}{呃，又一群怪人。