芳烃

As the secondary generation host, CD have received considerable attention because of its particular characterization, and the studies on host-guest interaction based on CD had been transferred from the processes and mechanism of inclusion complex between a pair of host and guest to construction of functional supramolecular aggregates, then these will be useful in the design and preparation of molecular machine and molecular devices, such as molecular pinchers, molecular gears, molecular motors and molecular balances, etc.

它的发展也先后经历了冠醚、环糊精、杯芳烃三代主要的主体化合物，环糊精作为超分子化学的第二代主体化合物以其独特的性质而倍受关注，基于环糊精的主-客体相互作用也在研究单一主体与客体包结形成过程及形成机理的基础上，进而追求具有特定功能的超分子聚集体，为设计制备分子钳、分子齿轮、分子马达、分子秤等重要分子器件和分子机器奠定基础。

Excellent agreement in PAH levels and distributions was found between pine needle and SPMD sampling, they serve as good biomarkers of organic compounds in the environment.

松针和SPMD对气态多环芳烃的监测具有很好的一致性，是进行区域大气污染评价的良好生物指示物。

In the CCR Platforming unit paraffins and naphthenes are converted into aromatics. The CCR Platforming unit also generates large quantities of hydrogen-rich gas.

在连续重整装置中把石脑油中的烷烃和环烷烃转化成芳烃，并副产大量的富氢气体。

In order to investigate the effect of operating variabls on the yield of aromatics,a certain fraction of a straight run gasoline containing 48.4%naphthenes was catalytically converted into aromatics over a bed of 100 ml 14—20 mesh,granular,platforming catalyst under various opera- ting conditions.

用直馏汽油的某一馏分在装有100毫升14—20筛眼颗粒形铂重整催化剂的反应设备中，进行单程纯氢操作的铂重整反应条件试验以考察芳烃的生成与反应条件变化的关系。

It studied that performance of extraction iron, plumbum of calix[4]arene and its derivatives by the means of TAS-986 spectrophotometer.

4用原子吸收研究了杯[4]芳烃及其衍生物对过渡金属离子铁、铅的萃取性能。

A series of new kinds of calix[4]arene and porphyrin derivatives were prepared.

本论文设计合成了一系列新型的杯芳烃及卟啉化合物。

Results showed that phenanthrene posed a negligible risk when 95% species were not affected at 95% confidential level. Fluoranthene and pyrene posed higher risk where the probability of the quotients exceeded unit would be near 20%.

结果表明，太湖梅梁湾水源地沉积物的多环芳烃中，菲、荧蒽、芘、苯并［a］蒽、屈、苯并［a］芘、二苯并［a，h］蒽7种具有潜在风险；在保护95%的物种水平下，菲的风险最小，而荧蒽和芘风险较高，达20%。

Pyrene adsorption to three HAs could be well fitted by Freundlich isotherms with significant correlation.

芘是常见的三环类芳烃物质，对芘的研究也越来越受到人们的重视。

It was found that low hydrogen purity and high moisture content of the hydrogen used for deoxidation was the main cause. Countermeasures such as exhausting 90% of the waste gas from the deoxidation process to hydrogen recompression system to reduce the water content in deoxidation zone, and using hydrogen from PSA unit to replace recycle hydrogen to increase the hydrogen purity, were adopted.

参考UOP公司及其它重整装置的经验，对重整催化剂还原工艺进行了改进，将90％的还原废气排入增压氢系统，可有效降低还原区的水含量；用PSA氢替代循环氢，可进一步提高还原区氢纯度，从而提高还原反应速度，改善再生催化剂的性能，使重整反应的芳烃产率有所提高。

Six calix[4]recorcinarenes are synthesized by the reaction of resorcin as substrates with six aromatic aldehydes, respectively.

以间苯二酚为反应底物，分别与六种芳香醛合成了相应的杯[4]间苯二酚芳烃，并通过红外光谱和氢核磁共振谱对这些化合物进行了表征。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐