查询词典 platinum

The preferred organometallic compounds of the present invention are of the formula (R1)m M(PR23)x, where M is a metal selected from the group consisting of manganese, technetium, rhenium, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium iridium and platinum wherein m is 0, 1, 2, 3 or 4; x is 2, 3, 4 or 5 and m+x are 2, 3, 4, 5, 6, 7 or 8, m and x selected according to each metals appropriate valence; each R1 is independently selected from the group consisting of hydrogen, deuterium, N2, H2, D2 and a variety of substituted alkyl groups; each R2 is independently selected from the group consisting of lower alkyl, aryl, arylalkyl, and alkyl-Z, aryl-Z and arylalkyl-Z where Z is selected from the group consisting of oxy, silyl, siloxy, oxysilyl, siloxy, oxysiloxy, silyalkyl, oxysilylalkyl, siloxyalkyl, oxysiloxyalkyl, silylalkoxy, silylalkoxy, siloxyalkoxy and oxysiloxyalkoxy; and wherein when M is cobalt and one group R1 is selected to be N2, then m is 2 and the second group R1 is hydrogen or deuterium.

有机化合物的首选本发明的配方是米(R1代)米×(pr23)、那里是一米的金属挑选出来，第一组由锰、锝、铼、铁、钴、镍、钌、铑、钯、锇、铱铂其中M是0、1、2、3或4； X是2，3， 4或5米×+有2，3，4，5，6，7或8 米和X挑选合适的价按每个金属； R1的是每一组由独立选自氢、氘、氮、氢气、 D2和各种烷基取代群体； R2中的每个组由独立选自烷基低、芳、芳基烷基、烷基的Z、芳基、芳基烷基的Z-那里的ZZ是选自组风、含硅、氧、oxysilyl、硅、oxysiloxy，silyalkyl， oxysilylalkyl，siloxyalkyl，oxysiloxyalkyl，silylalkoxy，silylalkoxy，siloxyalkoxy和oxysiloxyalkoxy；其中，M是当钴一派R1的选择是氮气、然后是2米，第二组R1的氘是氢或者。

The flotation behaviour of platinum from stannous chloride-malachite green-water system in the presence of ammonium sulphate was studied.

研究了在盐酸介质中硫酸铵存在下氯化亚锡-孔雀绿-水体系浮选分离铂的方法。

Ruber Fab platinum-cured silicone,ultra-flexdible hoses have been developed for high temperature conditions,Autoclavable and sterilizable,our hoses fulfill demands for high purity,safety,pharmaceutical and blocompatibility.

&Rubber Fab&高纯度矽胶软管是一种能耐高温的高柔软性软管，可应用在对纯度，无菌安全性能有较高要求的药品和生物科技上，可定购无接头或有接头软管。

The results demonstrate that the platinum adducts influence moderately on tautomeric equilibrium, but do not change the relative stability of tautomers whether in gas phase or in aqueous solution.

结果表明：顺铂的键连引起了互变平衡的变化，但是各互变异构体之间的相对稳定性顺序并没有改变。

The test indicates:if the time of drying samples is more than 4 h,taking lithium tetraborate as flux,and temperature of melting samples controls at 1 100 ℃,the most stable percentages of gold and platinum can be determined,which are 0.243% and 0.174% respectively.

实验表明：样品干燥时间在4 h以上，然后以四硼酸锂为熔剂，熔样制片温度控制在1 100 ℃时，测得金和铂含量最稳定，其质量分数分别为0.243%和0.174%。

By developing the electrochemical method in this thesis to control surface structure and growth of metal nanocatalysts, we have prepared successfully not only platinum and palladium tetrahexahedral nanocatalysts, but also other nanocrystals of various shape enclosed by different high-index facets.

本文发展的金属纳米催化剂表面结构控制和生长的电化学方法，不仅制备出二十四面体Pt、Pd纳米催化剂，而且也用于成功制备其它高指数晶面围成的不同形状的金属纳米晶体。

Well dispersed platinum nanoparticles and those with special shapes were synthesized through electrochemical and thermochemical methods.

采用电化学方法、热化学方法在水相中制备了分散性良好的铂纳米粒子以及具有一定形貌的铂纳米粒子结构。

A direct method to prepare nanometre catalyst of positive electrode for methyl alcohol fuel battery is to add strong oxidant to a mixed solution of manganese nitrate and some other metal nitrate, to coat them on the graphite electrode to have catalyst precursor produced, then to prepare the non-platinum nanometre catalyst of metal ion-doped manganese dioxide with carbon as a carrier by thermolytic reaction of the in-situ precursor. The prepared catalyst has the advantages of high electrical catalytic activity of methyl alcohol, high performance to protect against CO poison and low price, and it can lower the battery manufacturing cost effectively as well as can raise the entire electrical property of the battery so that the price performance and the market competitive edge of the battery are enchnaced effectively.

一种直接甲醇燃料电池阳极纳米催化剂的制备方法是在硝酸锰和其它金属硝酸盐的混合溶液中加入强氧化剂，涂抹于石墨电极上制成催化剂先驱体，通过先驱体在原位的热分解反应来制备以碳为载体的金属离子掺杂二氧化锰非铂纳米催化剂；制得的催化剂具有高的甲醇电催化活性、高的抗CO毒化性能以及低廉的价格等优点，可以有效地降低电池的制造成本，提高电池的整体电性能，从而有效地提高直接甲醇燃料电池的性能价格比及市场竞争能力。

The operations of these laboratories will be described as well as the defined instruments of the ITS-90, thermometric fixed points and standard platinum resistance thermometers.

介绍这些实验室的工作情况、ITS－90 定义的有关仪器、温度固定点和标准铂电阻温度计。

However, this contradicts other experiments that have demonstrated that treated tumor cells do not contain bare platinum, but rather undegraded cisplatin—accumulated in certain organelles.

其中就含有一些完整的顺式铂氨。小泡接着进入胞内，并且和包括细胞核在内的细胞器发生接触。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。