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The toxicity of selected compounds and their binary mixtures of sodium dodecyl sulfate with three substituted aromatic compounds to photobacterium phosphoreum was investigated, respectively.

研究阴离子表面活性剂十二烷基硫酸钠和苯酚、硝基苯、甲苯3种取代芳烃对发光菌的单一毒性，以及在等浓度配比条件下，SDS与这3种取代芳烃二元混合体系的联合毒性效应，并采用毒性单位、相加指数、相似性参数和泥合毒性指数进行毒性评价。

The results show that reaction of petroleum waxes to light is photooxidative reaction of free-radical which is caused by nitrogen-containing, oxygen-containing and aromatic compounds.

发现渤海原油的石油酸主要是由环烷酸所组成，直链脂肪酸含量较少，支链脂肪酸随着馏分沸点的升高含量逐渐降低。

In cosmetics, nail polish of the highest content of phthalic acid esters, aromatic components, many cosmetics also contain the substance.

在化妆品中，指甲油的邻苯二甲酸酯含量最高，很多化妆品的芳香成分也含有该物质。

To explore new synthetic methods, we set out a careful investigation of the reaction of benzimidazolium salt with many nucleophilic agents, including the active aromatic compounds and heteratom nucleophilic agents, and found that the quaternary C=N is not so active; when benzimidazolium salt is reacted with big nitrogen nucleophilic agent? phthalimide, it does not give the expected addition product, instead, produces N-alkyl phthalimide through alkyl-transfermation from benzimidazolium salt to phthalimide.

为了开发新的合成方法，研究了苯并咪唑盐与各种亲核试剂（活泼芳环与杂原子亲核试剂）的反应，发现苯并咪唑盐不与活泼芳环及杂原子亲核试剂发生2位加成反应；在与体积较大的位阻型N亲核试剂邻苯二甲酚亚胺反应时，未得到亲核试剂与极化的C＝N的加成产物，而是得到N烷基化的邻苯二甲酰亚胺，进一步研究表明，苯并咪唑盐将1（3）位N上的烷基转移给了邻苯二甲酰亚胺，并讨论了其反应机理和取代基，溶剂效应。

5 The pinacol coupling reaction of aromatic aldehydes and ketones was performed in 8-95% yield with magnesium in 0. 1M aqueous NH4CI.

2.4 以蒙脱土K10和锌的体系中，在超声波作用下，研究了醛、酮的还原偶联反应，于22～30℃反应2～3小时，产率23～91％。

A reduction-coupling-etherification reaction between aromatic aldehydes or ketones (1) and alcohols ( 2 ) to yield corresponding diether ( 3 ) of pinacol in the presence of tin and chlorotrimethylsilane.

在三甲基氯硅烷、四氢呋喃体系中，芳香醛、酮和醇在金属锡的作用下发生还原-偶联-醚化反应生成相应的频那醇二醚类化合物。

Nevertheless, the yield of pinacol was also strongly affected by the steric environment surrounding the carbonyl group. The pinacol coupling of aromatic aldehydes has been achieved with high yields under such a condition. However, the diastereose-lectivities of pinacols were not satisfying. Unfortunately, the ketones and most aliphatic aldehydes appeared inert under the same reaction conditions.

然而， 呐偶合反应的产率受到羰基周围环境的立体位阻影响较大，在此条件下，锌粉能有效地促进芳香族醛类化合物进行水相呐偶合反应，得到的呐醇产率高，但非对映异构体选择性差，而脂肪族醛类化合物得到的呐醇产率较低，在同样的条件下，酮类化合物不能顺利进行呐偶合反应。

However, research on polycyclic aromatic hydrocarbons in the environmental medium within the industrial area has not been reported yet.

目前国内外对环境中的多环芳烃已开展了较多的研究，但有关工业区环境介质中的多环芳烃研究尚未见报道。

And the relationships between polycyclic aromatic hydrocarbons and typical inorganic pollutants were analyzed.

并分析了多环芳烃和典型无机污染物之间的关联性。

Polycyclic aromatic hydrocarbons in soil have serious latent danger to our human health.

土壤中的PAHs对人体健康具有潜在的危害。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。