芳芳

The field surveys and lab experiments were designed to study the distribution and source of PAH' pollution in water, sediment; the PAH' concentration and distribution in marine fish organ (of the fish Lateolabraxjaponicus and Pagrosomus major); the PAH' BCF factors of liver and bile in marine fish (Lateolabrax japonicus and Pagrosomus major); the relationship between PAH' exposure and biochemical response and the metabolic rate of naphthalene and pyrene in fish bile.

研究了多环芳烃在厦门西海域养殖区的表层海水、沉积物中的含量分布，并应用PAH型式的分子指纹方法分析了其来源特征。指出：(1)厦门西海域养殖区海水和沉积物的多环芳烃污染已很严重。表层海水的∑PAH（16种PAH）已达4.55μg/L，沉积物的∑PAH已达2.86μg/g。

Reaction of the insertion adducts with epoxide s and α,β unsaturated esters in THF HMPA afforded the corresponding unsymmetrical selenides, respectively.

硒插入芳基锌的C—Zn键产生对应的芳基硒化锌，它与环氧或α，β不饱和酯在温和的条件反应生成对应的不对称的硒醚

Saleswomen in those countries are attracted by the potential earnings and by the loans Avon offers to help new representatives get started.

这些国家的销售员被雅芳的潜在收益和雅芳提供给新代理的创业贷款所吸引。

It was found that the main reason why SBS containing oil was easy to yellow was that there is plenty of polycyclic aromatic hydrocarbon in the extender oil,PAH can easily turned quinones with yellow.Antiyellowing performance of SBS can be only developed in a little extent when antioxidants were added.The anti-yellowing performanc...

研究结果表明，充油SBS产品变黄的主要原因是油品中的稠环芳烃在光氧环境中易转化为黄色的醌，添加抗氧剂对延缓产品变黄的作用不大，通过催化加氢消除填充油中的芳烃或添加适当的光稳定剂可以提高产品的耐黄变性能。

Their extraction properties have been studied by metal picrates liquid-liquid extraction and the results show:By using three thio-heterocyclic compounds, twelve novel derivatives of thioalkoxycalix[4]arenes on the lower rim have been synthesized and structurally characterized by 1H NMR、13C NMR、IR and MS.

本文采用三种巯基杂环化合物对杯芳烃下沿进行修饰，得到了下沿含有杂环硫烷氧基的杯芳烃系类系列衍生物，并利用~1H NMR、~(13)C NMR、IR和MS对所合成的十二个未见文献报道的新化合物进行了结构表征。

X 6.36(3)? is formed.Liquid-liquid extraction experiments, between twelve heterocyclic thioalkoxycalix[4]arene on the lower rim, fifteen heterocyclic thioacetamidecalix[4]arene on the upper rim and Na~+、K~+、Cs~+、Mg~(2+)、Cu~(2+)、Co~(2+)、Cd~(2+)、Ni~(2+)、Pb~(2+)、Hg~(2+) and Ag~+ picrates, have been carried out and their results are compared.

分别将十二个下沿含有杂环硫烷氧基杯芳烃衍生物和十五个上沿含有杂环硫乙酰胺基的杯芳烃衍生物与Na~+、K~+、Cs~+、Mg~(2+)、Cu~(2+)、Co~(2+)、Cd~(2+)、Ni~(2+)、Pb~(2+)、Hg~(2+)和Ag~+的十一种苦味酸盐进行了离子萃取实验，并对两类衍生物与不用金属离子的萃取能力进行了分析和比较。

There are more than 100 different PAHs.Most PAHs do occur alone in the environment.

绝大多数的多环芳烃在环境中不是单独存在，它们往往是两个或更多的多环芳烃的混合物。

Rather they are found as mixtures of two or more PAHs.

绝大多数的多环芳烃在环境中不是单独存在，它们往往是两个或更多的多环芳烃的混合物。

There are more than 100 different PAHs.Most PAHs do occur alone in the enironment.

绝大多数的多环芳烃在环境中不是单独存在，它们往往是两个或更多的多环芳烃的混合物。

Most PAHs do occur alone in the environment. Rather they are found as mixtures of two or more PAHs

绝大多数的多环芳烃在环境中不是单独存在，它们往往是两个或更多的多环芳烃的混合物。

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。