多环芳烃

Excellent agreement in PAH levels and distributions was found between pine needle and SPMD sampling, they serve as good biomarkers of organic compounds in the environment.

松针和SPMD对气态多环芳烃的监测具有很好的一致性，是进行区域大气污染评价的良好生物指示物。

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%。

Polycyclic aromatic hydrocarbons are the environmental organic pollutants which can induce cancers, teratogeny and organism saltation.

多环芳烃是一类具有致癌、致畸以及能够诱导有机体突变的环境有机污染物。

A method for the determination of polycyclic aromatic hydrocarbons in smoked meat by gas chromatography/mass spectrometry has been established.

建立了熏肉中多环芳烃的气相色谱/质谱测定方法。

On planet Earth, PAHs are widely encountered as the sooty products of combustion.

在地球上，燃烧之后经常能出现焦黑色的产物那就是多环芳烃。

Coking plant inside the steel mill was one of the most important sources in the area.

钢铁企业内的炼焦厂是该区域多环芳烃主要污染源之一。

Dehydrogenase appeared to be more sensitive than urease.

对复合污染模型的建立与分析表明，土壤环境中，重金属和多环芳烃复合污染的类型和强度与污染物的浓度和复合污染时间密切相关。

They are low-toxicity、long effect contaminations,It is difficult to wipe them off.

萘是常见的多环芳烃化合物，它是16种优先控制PAHs的一种。

Under laboratory conditions, this paper studied the adsorption of different concentration 40, 400 and 4 000 μgL^(-1 polycyclic aromatic hydrocarbons including low molecular weight acenaphthylene, phenathrene and chrysene and high molecular weight benzo perylene in seawater by the leaf litters of Kandelia candel and Avicennia marina at different decomposition status.

在实验室条件下，研究了海水中多环芳烃（含低分子量PAHs苊、菲和以及高分子量PAHs苯并芘）浓度分别为40、400和4000μgL^(-1)时，红树植物秋茄和白骨壤不同分解状态落叶碎屑对PAHs的吸附作用。

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 absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。