锡

The weight ratio of catalysis system and ammonium lactate being 0.005-5％, and the magnetism solid acid catalyst and tin dichloride being 20∶1-1∶20; c.

催化体系总的加入量为乳酸铵重量的0.005-5％，磁性固体酸催化剂与二氯化锡的重量比为20∶1-1∶20；c。

The landscape has rolling hills and many beautiful cities, such as Metz, Strasbourg, Nancy and Dijon.

该景观已绵延起伏的山峦和许多美丽的城市，如梅斯，斯特拉斯堡，南锡和第戎。

A new mathod is studied for the synthesis of diketone s with the crosscoupling reaction of organotin reagents and diacyl chlorides catalyzed by cellulose oxyphosphine palladium complex compound.

本文首次采用纤维素氧膦-钯络合物为催化剂，以丙酮为溶剂，有机锡试剂与二元酰氯偶联合成二元酮化物。

The total iron in iron ore was titrated by potassium permanganate standard solution with sodium diphenylamine sulfonate as indicator.

用HNO3-HF处理，硫-磷混酸溶解试样，在盐酸介质中，用二氯化锡－三氯化钛将Fe(上标 3+)还原为Fe(上标 2+)，以二苯胺磺酸钠为指示剂，以高锰酸钾标准溶液滴定铁矿石中的全铁量。

In the presence of the combination of sulphuric and phosphoric acid, with sodium diphenylamine sulfonate as the indicator, standard solution of potassium dichromate was used to titrate total iron value.

试样以盐酸溶解后，在酸性介质中，先以氯化亚锡将三价铁大部分还原为二价，然后在钨酸钠指示下，再以三氯化钛将剩余的三价铁还原为二价，过量的三氯化钛以重铬酸钾氧化消除干扰，在硫磷混合酸存在下，以二苯胺磺酸钠为指示剂，用重铬酸钾标准溶液滴定全铁量。

These poems greet us with leaking giraffes, dogs that lick lye, the Lone Ranger, the inhabitants of Dishwater Island, an unmarried wife and a Sikh cab driver, all acting within a familiar environment of telephone messages, factory work, walks through woods, red robins and hummingbirds, war zones and American histories.

这些诗向我们打招呼泄露长颈鹿，狗舔碱液，独行测距仪，居民dishwater岛一位未婚的妻子和一个锡克教计程车司机，他们都是在一个熟悉的环境中的电话留言，工厂的工作，走过树林，红鸟和其他鸟类，战争地区和美国的历史。

When the molar fraction of SnO2 is 83%, the main component of the coating isO2 solid solution with rutile structure. When the molar fraction of SnO2 is 44%, the main components of coating are theO2 solid solution with rutile structure andO2 solid solution with fluorite structure. When the molar fraction of SnO2 is 17%, the main component of the coating isO2 solid solution with fluorite structure. Annealed at higher temperature than 450 ℃, CeO2 is found in the coating containing 83%Sn, and there is not SnO2 in the coating containing 83%Ce, which suggests that fluoriteO2 has higher thermal stability than rutileO2. When the molar fraction of SnO2 increases, the dispensability of the coatings is improved greatly.

结果表明：通过控制制备条件可获得具有纳米结构的钛阳极涂层；当Sn的摩尔分数为83%时，涂层主要为金红石相的O2固溶体；当Sn的摩尔分数为44%时，涂层中金红石相O2固溶体和萤石结构的O2固溶体共存；当Sn的摩尔分数为17%时，涂层由萤石结构的O2固溶体组成；高于450 ℃退火时，含83%Sn的涂层中出现CeO2相，而在含83%Ce的涂层中没有出现SnO2相，表明在相同的溶质浓度下，萤石结构的O2固溶体比锡基金红石相O2固溶体具有更好的热稳定性；而涂层中的SnO2具有明显改善涂层分散性的作用。

The method is characterized in that: mixture of macromolecular dihydric alcohol and a dihydroxybutyl-terminated polydimethylsiloxane is dehydrated, added with diisocyanate for reaction, then added with a bis propionic acid, a dihydric alcohol chain extender and a catalyst - dibutyl tin laurate, and is diluted by acrylic ester; temperature reduction and emulsion are performed on the mixture after reaction; chain extension reaction is performed in water by a multi-amine chain extender, and siloxane modified polyurethane dispersoid which contains acrylic ester monomer is prepared; and an initiator - potassium persulphate is added into the siloxane modified polyurethane dispersoid for emulsion polymerization.

特征是先将大分子二元醇与二端羟丁基聚二甲基硅氧烷的混合液脱水后加入二异氰酸酯，反应后加入二羟甲基丙酸、二元醇扩链剂和催化剂二月桂酸二丁基锡，并用丙烯酸酯进行稀释，反应后降温乳化，用多元胺扩链剂在水中进行扩链反应，得到含有丙烯酸酯单体的硅氧烷改性聚氨酯分散体，然后再通过加入引发剂过硫酸钾进行乳液聚合。

Under the catalytic reaction of Sn 2-ethyhexanoate (ZnOct2), lactic acid was used to synthesize DLLA in the experiment.

文中以D，L-乳酸为原料，在催化剂辛酸亚锡(ZnOct2)的作用下，合成DLLA。

PDLLA/β-TCP composite was obtained by mixing β-TCP and DLLA in a certain proportion prior to ring-opening polymerization when Sn2 as initiator in a vacuum circumstance and a constant oscillation.

以辛酸亚锡作引发剂，将一定比例的β-磷酸三钙与DL丙交酯混匀后在真空体系下开环聚合，并持续均匀振荡，得到PDLLA/β-TCP复合材料。

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。