催化剂

As an important member of nanophase materials,nanophase oxide materials play an important part in refined ceramics,electric eye,magnetic materials,sensors,catalysts and luminous materials.

纳米氧化物材料作为纳米材料中的重要一员，在精密陶瓷、光电池、磁性材料和传感器、催化剂、发光材料等方面有着重要作用。

In this paper, two types of polyamidoamine have been synthesized by divergent with ethylenediamine and ammonia as core respectively.

尽管目前对这类大分子性质研究的还不是很深入，但在药物输送、催化剂、基因治疗及传感器等应用领域已取得了突破性的研究进展。

The Pd-Cu/C catalysts were shown to have the face centered cubic crystal structure. This could indicate that the addition of Cu shortened the Pd-Pd distances in the crystal lattice, and therefore –HO(subscript 2ads) and O-O could be better adsorbed on the surface of the catalyst. When NaBH4 was used as the reducing agent, and the atomic ratio of Pd to Cu was 3:1, the resulting catalysts had an average particle size of 3. 4nm and showed the best catalytic performance. The electrochemical active surface are a of Pd3Cu/C was 38.9m^2/gPd and the oxidation reduction reaction activity of the Pd3Cu/C catalyst was much higher than that of the Pd/C catalyst. The electrochemical activity of the Pd3Cu/C catalyst was comparable to that of a commercial Pt/C catalyst.

结果表明：催化剂中Pd与Cu的物质的量之比与预设值相近，Pd和Cu基本被全部还原；Pd-Cu/C催化剂为面心立方结构，元素铜的加入使催化剂的Pd-Pd间距缩小，从而HO(下标 2 ads)和OO键能更好地吸附在催化剂金属表面；当采用NaBH4为还原剂，Pd与Cu物质的量比为3：1时，催化剂(Pd3Cu/C)的平均粒径为3.4 nm，催化剂的催化性能最好，电化学活性表面积EAS达到38.9平方公尺/gPd，电化学性能较Pd/C催化剂有很大提高，接近Pt/C商用催化剂。

The effective factors of reaction temperature,catalyst,gelatinization time and baking condition during the preparation process were studied.

采用溶胶－凝胶法制备10－30nm的二氧化钛，并研究了反应温度、催化剂、凝胶化时间及焙烧条件对粒子形成的影响。

English teaching methods dominating in Late Qing Dynasty included Pidgin English Method, the Grammar-Translation Method and the Gouin Series Direct Method.

语法翻译法和古安系列法在我国对外汉语教学中有较大影响，而别琴英语法应是医治"汉语恐惧症"的灵丹妙药和缓解"汉语热"师资短缺的捷径及弘扬中国民族文化的"催化剂"。

Polywas directly halogenated to select halogenation agents such as Cl and Br and catalyst system.

通过将聚乙烯醇直接卤化取代，筛选出Cl、Br等卤化剂、催化剂，并优选出合适的体系，使其既保持PVA的高阻氧性，又能保证加工性时的热稳定

Terephthalic acid ; hydrogenator ; stress corrosion cracking ; alkaline washing ; catalyst ; safety analysis

对苯二甲酸；加氢反应器；应力腐蚀开裂；碱洗；催化剂；安全分析

Lack of information on the description of its route of synthesis, absence or insufficience of its impurity profile (related substances, reagents, solvents, catalysts), and the carry-over of its impurities to the final substance (58.5% of dossiers).

缺少如下资料：起始原料合成路线的叙述，起始原料的杂质概况（有关物质，试剂，溶剂，催化剂）没有或不充分，起始物料中杂质携带至原料药中的情况（申请文件的58.5%）。

Therefore, political compromise is liberalist philosophy in their political life.

因此政治妥协对民主政治的形成产生了深刻影响，是民主政治的"催化剂"。

Under the catalyst, the polymerization retarder, the including water medicinal preparation existence condition, the methylacrylic acid and the polyethylene glycol single methyl ether (400) direct esterification synthesis methylacrylic acid polyethylene glycol single methyl ether (400) ester, and the influence factors of the catalyst, polymerization retarder, including water medicinal preparation has mellowly carried on the comparison.

摘要在催化剂、阻聚剂、带水剂存在的条件下，由甲基丙烯酸与聚乙二醇单甲醚(400)直接酯化合成甲基丙烯酸聚乙二醇单甲醚(400)酯，并对酸醇比、催化剂、阻聚剂、带水剂等影响因素进行了比较。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。