锡

Test of electrochemical methods Benzylidene acetone, formaldehyde, compound additive D, ammonium metavanadate solution of acid sulfate tin polarization curves, test ammonium metavanadate on the open circuit potential acid sulfate solution of tin.

用电化学工作站测试分析苄叉丙酮、甲醛、复合添加剂D、偏钒酸铵对酸性硫酸盐镀锡溶液的极化曲线的影响，测试偏钒酸铵对酸性硫酸盐镀锡溶液开路电位的影响。

Benzylidene acetone desorption potential acid sulfate tin plating solution is very close to the ideal desorption potential; Benzylidene acetone, formaldehyde can regulate the desorption potential role and can increase the current density range; Composite additive D can make acid sulfate tin plating solution in the hydrogen produced during the rapid detachment; Ammonium metavanadate can catalyze Sn4+ and restore to Sn2+, and then make solution stability.

苄叉丙酮的脱附电位很接近酸性硫酸盐镀锡溶液的理想脱附电位；甲醛具有调节苄叉丙酮脱附电位的作用，并且能够增大电流密度范围；复合添加剂D能够使酸性硫酸盐镀锡溶液在电镀过程中产生的氢气迅速脱离；偏钒酸铵能够催化Sn4+还原为Sn2+，从而使镀液稳定。

The exo-cyclic tin atoms are five-coordinate and have coordination geometry of monocapped trigonal bipyramid with very similarly distorted mode.

有关该类化合物的晶体结构研究表明，中心锡原子的配位形式决定于直接与锡原子相连的烃基的结构和羧酸基配体的类型[8～ 10 ] 。

The results indicated that the Sn atom in bistin Schiff base complexes was five-coordinated in trigonal bipyramidal geometries thanks to the existence of intermolecular ligands of Sn←N.

Schiff碱具有良好的配位作用，它们与不同的有机锡化合物配位后可以形成形式多样、结构不同的配合物，而且Schiff碱具有多种生物活性，与有机锡化合物生成配合物后，配合物的生物活性可能更宽广。

The endocyclic Sn atoms exist in a distorted triginal bipyramidal geometry with the coordination number of 5. The exocyclic Sn atoms form 6 significant bonds and exist in a distorted octahedron geometry.

化合物12的X衍射单晶测定表明，化合物是以Sn2O2四元环为中心的中心对称二聚体结构、内环锡为5配位的畸变三角双锥结构、外环锡为6配位的畸变八面体结构。

It bas been discovered that the carboxylic ester rare earth salt is superior to the organotin in antidehydrochlorination, and inferior to the organotin in antioxidation through following the tracks of carboxide group and conjugated double bond with the help of infrared spectroscopy and ultraviolet-visible spectroscopy.

借助于红外光谱和紫外／可见光谱，通过跟踪光老化过程中羰基基团和共轭双键的变化，发现羧酸酯稀土的抗脱HCl能力优于有机锡，但抗氧化能力不如有机锡。

Cassiterite has been an important tin ore for eons and is still the greatest source of tin today.

锡石作为一种重要的锡矿石已有数十亿年的历史，时至今日仍然是锡的重要来源。

Cassiterite is usually black, reddish brown and yellow in color and gems larger than 1 carat are exceedingly rare.

锡石颜色通常有黑、红棕和黄色，超过1克拉重的锡石可称之为极品。

The making of tin (the technical English word for tin is Cassiterite which is said to have been derived from the Sanskrit term Kasthira ).

锡的制造（锡这个单词在英语里的技术语言是 Cassiterite ，据说是源自印度梵语单词 Kasthira 。

The metallogenic series in time can be divided into three metallogenic pe riods (cassiterite silicate period, cassiterite sulfide period and base metal sulfidr period ) and six metallogenic stages.

该成矿系列时间递变可分为三个成矿期(锡石硅酸盐成矿期、锡石硫化物成矿期和贱金属硫化物成矿期)和六个成矿阶段。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了