苯并芘

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%。

With the reduction of SOM content and the elevation of contamination concentration, the difference between PHE and PYE decreases gradually, while B［a］PYE exhibits a significant difference from them. This could be attributed to the high lipophilicity and large molecular size of B［a］PYE, which make the molecule of B［a］PYE to be more easier to be held in the nanopores of clay and the dense region of SOM.

不同多环芳烃SPMD辅助解吸率差别很大，随着土壤有机质含量的降低，以及污染物浓度的提高，菲和芘的解吸差异逐渐缩小，而苯并［a］芘与上述2种多环芳烃的差异很大，主要是由于苯并［a］芘具有高度亲脂性，并且分子较大，造成其容易滞留在粘土的微孔及有机质的致密结构中。

The most important carcinogens in tobacco is tar, which contains large amounts of carcinogenic effects of a strong 34 Benzo A Pyrene.

烟草中最主要的致癌物质是煤焦油，它含有大量致癌作用很强的34苯并A芘。

In order to develop a new method to study the desorption and bioavailability of hydrophobic organic chemicals in soils, a method using semi-permeable membrane device to study desorption of HOCs in soils has been set up, and assisted desorption of polycyclic aromatic hydrocarbons, phenanthrene, pyrene, and benzo［a］pyrenein three different kinds of soils was studied using SPMD.

为了开发一种表征土壤中憎水性有机污染物解吸及生物有效性的新方法，建立了半透膜被动采样装置研究土壤中有机污染物解吸行为的方法，利用SPMD分析了多环芳烃菲、芘和苯并［a］芘在3种不同性质土壤中的辅助解吸行为。

As a result of aromatization of organic matter during the thermal cracking of original bitumen into gas,the aromatic hydrocarbons in the bitumen are characterized by abnormally abundant tetra-and penta-cyclic compounds,and predominated by parent aromatic compounds without alkyl chain,such as fluoranthene,pyrene,chrysene, benzofluoranthene etc.

沥青的芳烃组成独特，富含四、五环芳烃化合物，且以萤蒽、芘、和苯并萤蒽等无烷基取代的母体芳烃化合物为主，反映出沥青裂解成气过程中的有机质芳构化作用。

Results: A total of 18 kinds of SVOCs were qualitatively and quantitatively analyzed, the main compounds deteced were dimethylphthalate, diethylphthalate, dibuylphthalate, bis (2-ethylhexyl) phthalate, phenol, chrysene, benzo anthracene, benzo fluoranthene, benzo perylene, indeno (1, 2, 3-cd) pyrene, dibenzo anthraeene.

结果：定性定量检出邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二丁酯、双（2-乙己基）邻苯二甲酸酯、邻苯二甲酸二辛酯、丁基苄基邻苯二甲酸酯、苯酚、4-甲基苯酚、萘、荧蒽、芘、屈、苯并蒽、苯并荧蒽、苯并荧蒽、苯并二萘嵌苯、茚并(1，2，3-cd)芘和二苯并蒽18种优先控制有机污染物。

Petroleum-derived contamination may be dominant source in the study area depending on the distribution of fluoranthene/pyren, benzo anthracene/ benzo (a anthracene + chrysene BaA/(BaA+ Cy, MP/P.

对多环芳烃特征组分的比值（荧蒽／芘、苯并蒽／BaA/(BaA+Cy及甲基菲与菲的比值分析表明：该河流表层沉积物的多环芳烃主要来源于原油污染。

Among the special nine pollutants, however, eight of them, including Hexachlorobenzene, N-Nitrosodi-N-propylamine, 3,3-dichlorobenzidine, 2,4,6-trichlorophenol, 2,3,4,5,6-pentachlorophenol, indeno (1,2,3-cd) pyrene, 4,4'-DDT and Heptachlor were in need of concern while another chemical: dibenzanthracene be of special concern. The sources of these chemicals were discussed and some control strategies were suggested based on the risk assessment.

结果表明，有18种有机污染物超过了USEPA的标准浓度要求，其中9种物质具有一定的生态风险，其中六氯苯、N-亚硝基二正丙胺、3，3'-二氯联苯胺、2，4，6-三氯酚、五氯酚、茚并(1，2，3-cd)芘、4，4'-滴滴涕、七氯在内的8种化合物具有一定的风险，而多环芳烃二苯并蒽需要引起更高警惕；在此基础上探讨了这些化合物的来源及作用，并提出了相应的防治建议。

The result indicated BaP and the subsequent oxidative stress disturbed the expression of mitochondrion-encoded genes, and this was potential biomarker for oxidative stress following xenobiotic exposure.

研究表明，土壤中苯并［a］芘污染改变了蚯蚓线粒体基因组的表达水平，线粒体基因组表达异常是多环芳烃污染胁迫的重要分子生物标记物。

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。