多环芳烃

There are 65 species of Chinese herbs with confirmed anti-HBV activityd, in which 16 probable active constituents are pointed out. They are arene, ketone derivatives, alicyclic carboxylic acid, aromatic carboxylic acid, ester, lactone, cyanide derivatives, heterocycle derivatives, carotenoids, anthraquinones, flavonoids, vegetable tannin, alkaloid, terpenoids, steroids and protein. Among them, the complexes of flavonoids, terpenoids, steroids and alkaloids are more abundant.

确定了具有抗乙肝病毒活性的中草药品种65种，其中含可能活性成分共16种，即芳烃、酮类衍生物、脂环族羧酸、芳香族羧酸、酯、内酯、氰类衍生物、杂环衍生物、类胡萝卜素、蒽醌类、黄酮类、植物鞣质、生物碱、萜类、甾类和蛋白质，而16种中以黄酮类、萜类、甾类和生物碱类成分为多。

If a hexagonal system H satisfies such property, that is, for a positive integer k and 1 t k, any t disjoint hexagons of H are mutually resonant, it is said to be k-resonant or k-coverable.

另一方面，从纯实验的角度出发，著名化学家Clar等发现，恰当地确定一个芳香性六隅体可预测出多环芳族烃的许多电性质。

Supermolecular compounds with several hydroxyl groups, containing calix[4]arenes and cyclodextrins, are first used to crosslinking copolymerize with acrylic monomers.

首次使用含有多个羟基的大环超分子类化合物杯芳烃和环糊精分别与丙烯酸单体进行交联共聚，同时还引入了醇胺、肌醇和辛醇等含有羟基的小分子。

The chapter two was focused on the samarium diiodide promoted organic reactions and their applications in organic synthesis, firstly, a new synthesis of highly substituted cyclopentadienes from a,β-alkynone promoted by samarium diiodide was investigated and the highly substituted cyclopentadienes were prepared in moderate to good yields under mild conditions. Secondly, the Michael addition and Michael-aldol tandem reaction of diorganyl diselenides or diorganyl disulfides with α,β-alkynones mediated by samarium diiodide were studied and a series of alkenylsulfides and alkenylselenides were prepared in good yields. Then the highly regioselecfive nucleophilic addition of the allylsamarium bromide to α,β-alkynones were explored. We found that the allylsamarium bromide reacts with α,β-alkynones to afford regiospecificly 1. 2-nucleophilic addition products in good yields under mild condition. At last we studied the coupling reaction of aryl halides promoted by NiCl〓/PPh〓/Sm〓.

第二章 研究了二碘化钐、金属钐促进的有机反应：1、二碘化钐促进下α，β-炔基酮的偶联环化反应，提供了一种制备多取代环戊二烯的新方法；2、二碘化钐促进下的二硫醚、二硒醚与α，β-炔基酮的Michael加成反应，为高产率地制备多取代的烯基硫或烯基硒化合物提供了方便可靠的新方法；3、二碘化钐促进下的二硫醚、二硒醚与α，β-炔基酮和醛、酮的Michael—aldol串联反应，提供了一种一锅法高产率地制备多取代的含硫的烯丙基醇或含硒的烯丙基醇类化合物的方便可靠的原子经济性的新方法；4、烯丙基溴化钐与α，β-炔基酮的高度区域选择性的1，2-亲核加成反应；5、NiCl〓/PPh〓/Sm〓促进的卤代芳烃的偶联反应-一种从各种卤代芳烃制备联苯类化合物的有效方法。

Finally, the methods of minimization and purification for PAHs are mentioned.

最后给出了多环芳烃减量化方法和净化措施。

Under the optimum conditions, good linear work curve was obtained by this method to determine four kinds of PAHs.

选择最大荧光峰值位置对四种多环芳烃做工作曲线，呈现较好的线性关系。

16 PAHs in the leaves of 9 kinds of broadleaved plants from Baiyun Mountain in Guangzhou were separated and analyzed quantitatively by GC-MS.

采集了白云山9种阔叶植物叶片样品，利用GC-MS对样品中的多环芳烃进行了定量分析。

The depositions of PAHs were more than those of OCPs.

多环芳烃的沉降量普遍高于有机氯农药沉降量。

Soils sampled from vegetable fields and sediments from the Pearl River all showed significant genotoxicity to V. faba, and their contents of polycyclic aromatic hydrocarbons, phthalic acid esters and heavy metals were also relatively high. There were good correlation between their genotoxicity to V. faba and their relevant contents of PAHs and heavy metals.

广州市郊区菜地土壤样品及所有的珠江沉积物对蚕豆根尖有明显的遗传毒性，对应多环芳烃、邻苯二甲酸酸类和重金属的含量相对较高，其中重金属元素和PAHs的含量与对蚕豆根尖的遗传毒性有较好的相关性。

If however instead of clean mineral oils tar oils are used, these often contain high amounts of polyaromatic hydrocarbons, which – as discussed before - are known to be carcinogenic.

如果用了矿物油焦油，就会含有多环芳烃-致癌物。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。