稀土

Finally, pentyl acetate and benteine could be respectively synthesized by esterification reaction in the presence of nanometer rare earth composite solid superacids (SO_4)~(2-)/ZrO_2-Gd_2O_3 and (SO_4)~(2-)/ZrO_2-Nd_2O_3. The effects of reaction time, reaction temperature, the mol ratio of acid to alcohol and the use level of catalyst on esterification yield were discussed. In the end, we obtained their optimal reaction conditions.

采用纳米稀土复合固体超强酸SO_4~(2-)/ZrO_2-Gd_2O_3，SO_4~(2-)，~/ZrO_2-Nd_2O_3分别合成了乙酸戊酯和乙酸苄酯两种香料，实验考察了反应时间、反应温度、醇酸比及催化剂的用量对酯化率的影响，并由此得出反应的最佳条件。

The relatively high Sr/Y (~ 40) and low HREE (Yb.8 ppm) suggest that garnet may play an important role, either as restite or as a fractionated phase, during petrogenesis of the rock.

其较高的Sr/Y（~ 40）和低的重稀土（Yb.8 ppm）反映在其形成过程有石榴石的残留或分离结晶。

In petrology, fenite and fenitization have been identified,and the existence of igneous carbonatite has been confirmed.

在地球化学和矿床成因方面，提出了稀土稀有金属矿化与火成碳酸岩岩浆活动有成因联系的见解。

Reaction of NaOAr, SmCl_3 and aryloxo-functional N-heterocyclic carbene precursor [HO-4, 6-di-~tBu-C_6H_2-2-CH_2{CHMe}]Cl in 4:1:1 molar ratio in THF in one-pot hadnt afforded an anionic phenoxide complex of samarium (5) supported by a bridged bisphenoxo through the cleavage of aryloxo-functional N-heterocyclic carbenes.

4将NaOAr、SmCl_3和[HO-4，6-di-~tBu-C_6H_2-2-CH_2{CHMe}]Cl以4∶1∶1摩尔比，采用一锅煮的方法，希望得到芳氧基功能化的氮杂环卡宾稀土芳氧配合物没有取得成功，而是得到了断裂的产物O-4，6-di-~tBu-C_6H_2-2-[CH{NNMe}[(O-4，6-di-~tBu-C_6H_2)_2CH_2][O-2，4-di-~tBu-C_6H_3]Sm(5)。

Effects of the different accelerants(La and Ce nitrate,Na nitrate and Na molybdate) on phosphatization were discussed.

提出在表面生成磷化膜以提高不锈钢的耐磨与耐蚀性能的工艺方法，讨论了各种促进剂(亚硝酸钠、钼酸钠、硝酸铈和硝酸镧)对磷化膜形成的影响，探讨了稀土对磷化的影响机理。

Study on Phosphatization and Passivation Two in One Treatment Process;2. Effects of the different accelerants(La and Ce nitrate,Na nitrate and Na molybdate) on phosphatization were discussed.

提出在表面生成磷化膜以提高不锈钢的耐磨与耐蚀性能的工艺方法，讨论了各种促进剂(亚硝酸钠、钼酸钠、硝酸铈和硝酸镧)对磷化膜形成的影响，探讨了稀土对磷化的影响机理。

By means of maceration-wave, added rare earth and CTMA to the bentonite, which produced a new absorbent. The adsorbent behaviour of adsorbent on phosphonium was discussed.

通过浸渍微波辐射法制备镧和CTMA改性的稀土吸附剂，探讨了吸附剂对磷的吸附性能。

Meanwhile, the phosphorescent mechanism and current situation preparation method of sulfide, titanate and oxysulfid hosts were summarized.

介绍了稀土掺杂红色长余辉发光材料的研究进展，总结了硫化物、硫氧化物、钛酸盐等基质体系的红色长余辉发光机制。

The silicon dioxide matrix could delay the photodecomposition process of the organic complexes.

考察了部分稀土有机配合物二氧化硅复合材料的耐紫外辐射性能。

Chapter Five: We use photoemission spectroscopy to study the interaction of the rare earth metal Cerium overlayers with GaSb (111) surface and their oxidation behavior as well.

第五章 利用超高真空中的光电子能谱的测量，就稀土金属Ce对半导体GaSb(111)表面的催化氧化特性进行了研究，并且研究了Ce的厚膜本身的氧化，探讨了Ce在催化氧化中所起的作用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。