苯并芘

The results showed that: low molecular weight aromatic, such as naphthalene, fluorene, acenaphthene, locates at low levels, while the high molecular weight aromatic locates at high levels, such as benzo perylene, indene [1,2,3-cd] pyrene, benzo fluoranthene and benzo pyrene, of which , the concentration of fluoranthene is highest, reaching about 19%.

结果表明：萘、芴、苊等低分子量芳烃的含量相对较低；苯并苝、茚并[1，2，3-cd]芘、苯并荧蒽、苯并芘等高分子量芳烃的含量相对较高；含量最高的单体为荧蒽，占待检的16种PAHs的19%以上。

More than 80% of acenaphthene, fluoranthene, pyrene, benzoanthracene, chrysene, benzofluoranthene, benzopyrene, indeno[1,2,3-cd]pyrene and benzoperylene were removed in down-flowing beds, with little further removal in the following up-flowing beds.

环芳烃中危、荧蒽、芘、苯并蒽、屈、苯并荧蒽、苯并芘、茚并[l，2，3-cd]芘和苯并苝经下行床后，去除率超过80%，上行床去除较少。

P ＜ 0. 001 while the organ coefficient of high dose group was much of HSP70 was characterized by greatly increased expression in low dose group while the relative expression of HSP90β was increased in middle and high dose groups.

热应激蛋白70表达改变以低剂量苯并芘染毒组相对表达值明显增高为特征；热应激蛋白90β表达改变为中、高剂量苯并芘染毒组相对表达值升高。

Results of study indicate that background values of priority PAHs, in aerosols in Pear River Delta area, including naphthalene,acenaphthylene, acenaphthene,fluorene,phenanthrene,anthracene, fluoranthene, pyrene, benzoanthracene, chrysene,benzofluoranthene, benzofluoranthene,benzopyrene, indeno(1,2,3-cd)pyrene, dib...

研究结果表明，珠江三角洲地区大气气溶胶中优控多环芳烃背景值萘、苊、二氢苊、芴、菲、蒽、荧蒽、芘、苯并蒽、、苯并荧蒽、苯并荧蒽、苯并芘、茚并（1，2，3-cd）芘、二苯并蒽、苯并分别为n.d。

The application of ultrasonic method in bored concrete pile detection;2. Suo′s method and ultrasonic method for extracting BPBenzo(aPyrene content from coke oven gas were introduced.

阐述了对焦炉煤气中苯并芘含量提取处理方法中的索氏法和超声法的两种方法，分析了两种方法测定相同含浓度苯并芘含量样品测试数据差异及产生原因，用实验数据分析说明了使用超声法作为测定焦炉煤气中苯并芘含量是一种最佳的处理方法。

BACKGROUND: Benzo pyrene is kind of polyaromatic hydrocarbon which is a chemical pollutant extensively existing in living and productive environments. It is found overseas that it has neurotoxic effects under certain conditions.

背景：苯并芘代表的多环芳烃是一种广泛存在于生产和生活环境中的化学污染物，国外发现苯并芘在一定条件下具有体外神经毒性。

Benzo pyrene on human health hazards of indoor air benzo pyrene concentration and lung cancer mortality was evident between the dose-response relationship.

苯并芘对人体健康的危害室内空气中苯并芘浓度与肺癌死亡率之间呈明显剂量反应关系。

This study monitored some important molecular ecotoxicological indicators of fish intoxicated by benzo pyrene.

通过测定典型的多环芳烃类物质苯并芘致毒后鱼体内几种重要分子生态毒理学指标的变化，来反映苯并芘致毒对鱼体的影响。

The ratios of perylene to benzofluoranthene and perylene to benzo pyrene are an effective index of thermal maturity.

／m、m／m［苯并芘］和m／m［苯并芘］比值是有机质演化程度的有效指标。

ResultsThe major occupational hazardous factors in the project were coke dust, carbon monoxide, benzopyrene, benzene soluble matter and noise. The detection results showed that MAC of benzopyrene on coke pushed side, TWA of benzene soluble matter of two posts and noise level of coke griddle were overproof the rest were eligible.

结果 该扩建项目主要职业病危害因素是焦炭尘、一氧化碳、苯并芘、苯溶物、噪声等；检测结果示焦侧苯并芘的最高接触浓度、炉盖工、出炉工苯溶物的时间加权平均浓度及输焦振筛的噪声强度超标，其余检测点检测结果均符合国家职业卫生标准。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。