金属环

In Figure 2-11b, a metal guard ring is added to the ionization chamber.

在图2-11b中，电离室上加了一个金属保护环。

The results show that this fiber contains multi\|functional groups, such as nitrogen, oxygen, heterocycle compounds and metal complexes, and has a better antibacterial activity, with good characteristics of broad spectrum, long lastingness and high efficiency.

结果表明：该纤维不仅含有多种含氮、含氧、杂环等官能团，且形成金属络合物，对不同菌类具备优异的杀菌活性，并具有抗菌谱广，作用时间持久和效率高等特点。

A serial of novel thiophene-based main chain conjugated compound with varieties of aromatic rings and heterocycle, such as acenaphtenequinoxaline phenanthrenequinoxaline ,have been synthesized on the base of looking for lots of references and summarized others research work.

在查阅大量文献和综合前人所作工作的基础上，我们选择卤代芳烃与Sn金属有机试剂在Pd催化下合成了以萘基喹喔啉和菲基喹喔啉为主的一系列噻吩与杂环构成的交叉共轭化合物。

The Catalyst used for preparation of carbodiimide from condensation of isocyanate were reviewed in this paper, including phosphorus-containing heterocycle compounds, phosphonate,organic metal compounds and polymer-grafting solid catalysts.

综述了异氰酸酯缩合生成碳化二亚胺催化剂的开发现状，包括磷杂环化合物、磷酸酯类化合物、金属有机化合物、聚合物接枝固相催化剂4大类。

Phosphorescent materials of iridium complexes had been attracted much attention in recent years.

中文摘要近年来环型的铱金属错合物是具有突破性的磷光发光材料。

Isinglass and other animal gelatin and its ramification.

硅、砷、二氧化硅、氯化物、溴化物及碘化物、稀土金属、钇、钪及其混合物、其他氯化稀土、碳酸稀土；柠檬酸、氨基酸酯及盐、氨基酸、有机硫化合物、双巯丙氨酸、甲硫氨酸、仅含有氧杂原子的杂环化合物，抗菌素，青霉素和有其结构的青霉素衍生物，链霉素及其衍生物以及它们的盐，四环素衍生物及其盐；鞋靴、家俱等的光洁剂、擦洗膏、明胶及其衍生物；鱼胶；其他动物明胶及其衍生物。

In addition,the one complex containing benzoaza-15-crown-5 pendant has a relatively higher catalytic activity over another one containing morpholine,which may be due to the preponderant effect of hydrophobic environment of the former.

Schiff碱类金属配合物除在氢化反应、环氧化反应、聚合反应、仿生催化氧化等方面得到广泛的应用外[5]，近两年来，我们发现Schiff碱金属配合物也能有效地促进酯的水解或剪切4

However, natural frequency of SRR is decided by lattice size, independent of transmission mode.

而金属共振环结构的固有频率只与结构的尺寸有关，不受传播模式的影响。

A process for reducing nitryl with unstable guanyl on para-position of benzene ring into azyl features that active metal reacts on organic acid and solvent at ordinary temp. and pressure to reduce N-(2 or 3-M, 5 or 6-M',4-nitrophenyl)-N',N'-dimethyl acetamidine into N-(2 or 3-m, 5 or 6-M', 4-aminophenyl)-N',N'-dimethyl acetamidine, where M=H,-R,-OR,-COOR (R=H, C1-C6); and M'=H,-R,-OR,-COOR (R=H, C1-C6). Its advantages include reduced by-reaction and high reducting rate up to 80%-95%.

本发明是将苯环上对位带有不稳定脒基的硝基还原为氨基的方法，采用活泼金属，如：锌或锡，与有机酸和适当的溶剂，在常温、常压下发生反应，将N－（2或3－M，5或6－M＇，4－硝基苯基）－N＇，N＇－二甲基乙脒还原为N－（2或3－M，5或6－M＇，4－氨基苯基）－N＇，N＇－二甲基乙脒，其中M＝H，－R，－OR，－COOR（R＝H，C1－C6），M＇＝H，－R，－OR，－COOR（R＝H，C1－C6），减少了副反应，使还原收率达到80％以上，最高可达95％以上，更适用于工业化生产。

The recent progresses in the study on the fluorescence of rare earth complexes and application for the determination of the rare earth elements and organic compounds, as fluorescent probes for bioactive materials analysis and as detection means in separation technology were reviewed in detail. In chapter two, the absorption spectra of the 4f electron transitions of the complexes of the neodymium, praseodymium, holmium and erbium with fleroxacin in the presence of CPC have been studies by normal and derivative spectrophotometry.

本文以稀土元素配位化学为基础，以导数吸收光谱技术和荧光光谱技术为研究手段，利用新一代喹诺酮类抗菌药物，抗凝血类杀鼠药物的化学结构特点和大环化合物冠醚与金属离子突出的配位能力，以分析应用为目标，系统研究了这些化合物同稀土元素形成的配合物的光吸收和荧光特性，通过对体系实验条件的优化，使体系的稳定性、选择性和灵敏度得到显著改善。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。