应用化学

Atrazine which is very persistent in the environment is able to exist in soil, surface and underground waters.

阿特拉津在世界范围内已经使用了40多年，目前仍然是应用广泛的化学除草剂之一。

Carborane, an important specie of borane derivatives, obtained by replacing BH or BH- group with C or CH, have applied in many fields due to its representative structure and special bond.

碳硼烷是用C原子替代BH单元或用CH单元替代BH-单元形成的一类重要的硼烷衍生物，其构型的典型性以及化学键的特殊性，在很多方面都有所应用。

Recently,chemical vapor depositionis gradually used in order to enhance the wear resistance and cutting efficiency of burs.

近年来，化学气相沉积法逐渐应用于车针后续处理过程之中，增强了车针的耐磨性和切削效率。

In the second part, quantum chemical AM1 methods were employedto theoretically investigate the electronic structures of maleic anhydride in ground- and excited-states. On basis of the frontier orbital theoryand three bonding principles, the possibility of reaction of active α-hydroxysuccinic anhydride carbanion and active α-hydroxy-succinic anhydride radical on polymerization process of MArespectively by alkali catalyst and by hydroxyl radical was discussed. Theanionic and radical polymerization of MA discussed also. Theoreticalstudies show that both polymerization products of MA are in the chainstructures, corresponding to the experimental findings.

第二部分用量子化学AM1方法，计算研究了马来酸酐的基态和激发态电子结构；应用前线轨道理论和成键三原则分别探讨了碱催化条件下和羟基自由基引发下马来酸酐均聚合过程中α-羟基丁二酸酐碳阴离子和α-羟基丁二酸酐碳自由基活性中间体参与反应的可能性及由它们引发的马来酸酐阴离子聚合反应机理和自由基引发聚合反应机理；理论研究表明马来酸酐的均聚合产物均为链式结构，与实验事实相相符。

According to SiO2 ,∑FeO, MgO and CaO content distribution in the histograms, chemical groups of the 23 chondrites were tentatively divided.

应用陨石中SiO_2、∑FeO、MgO、CaO的含量进行图解对比，划分出陨石的化学群，取得了初步的结果。

Editors' Choice - GENETICS: Color Convergence in Columbines | CHEMISTRY: Taste and Timing | ECOLOGY: Mopping Up Little Helpers | APPLIED PHYSICS: Copper Confinement | GEOLOGY: Glass at a Crash Site | ECOLOGY/EVOLUTION: A Conservation of Clouds | PSYCHOLOGY:'Tis the Season...

编辑选择--遗传学：彩色衔接columbines|化学：品味和时间|生态：清剿小助理|应用物理学：铜隔离|地质学：玻璃在坠机地点|生态/进化：保育云|心理学：'赛季运输资讯

First ofall, these are techniques based on the use of chemically bonded complexing groupings.

首先，这些技术都基于化学键合配位基团的应用。

Lastly, the comparison of those PVDF hollow fibers membrane before and after modification has been studied by separately applied them to practically oil water (with confected concentration of 60mg/L) separation test, the decrease of water flux was measured, according to the results, grafted hollow fiber membrane showed better antipollution capability, it indicated that this method is practicable and effective.

最后，将改性前后的中空纤维膜分别应用于油水(自配浓度为60mg/L)分离试验，测定膜通量的衰减，数据表明改性后的PVDF中空纤维膜表面的抗污染能力有很大程度的提高，这说明用表面化学接枝改性的方法可以改善疏水的PVDF膜表面，该方法是切实可行的。

Making use of its high refractive index and good property of dispersion in medium, titanium white is widely used as delustrant in synthetic and artificial fibers to eliminate the polish of fibers and reduce the transparence of textile.

利用其高折光系数和在介质中良好的分散性，化纤钛白被广泛应用于涤纶、晴纶等化学合成纤维及人造纤维中作消光剂使用，以除去纤维光泽，降低织物的透明度。

The β-ditones and the match thing of its derivatives be the mufti-functional materials in the metals organic LCD, the extract reagent, chemical shift reagent and the defend false material, etc. have already caused the widespread interesting. Recently, it is discovered thatp-ditones compounds have Photoluminescence and Electroluminescence flaring dual properties, can also take place the certain interaction with gene, and have good applied foreground to the development of the new mufti-functional materials.

一二酮及其衍生物的配合物作为新型多功能材料在金属有机液晶、萃取试剂、化学位移试剂、防伪材料等方面己引起人们普遍的重视，近年又发现该类化合物同时具有光致发光及电致发光的双重性，还可以与基因发生一定的相互作用，对新型多功能材料的开发具有良好的应用前景。

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。