多环芳烃

A 75-day-long pot experiment was carried out to study effect of plantation of ryegrass on dynamic degradation of phenanthrene in soil.

研究了种植黑麦草对土壤中3环多环芳烃菲的动态降解作用。

Cytochrome P450 BM-3 (CYP102) from Bacillus megaterium catalyzes the subterminal hydroxylation of long-chain fatty acids (C12 to C20) at the positions ω-1,ω-2,ω-3 and the epoxidation of unsaturated fatty acids. Artificial mutants of P450 BM-3 also hydroxylate substrates like short-chain fatty acids (C8 to C10), alkanes, cycloalkanes, heteroarenes and polycyclic aromatic hydrocarbons, which offers potential applications in the pharmaceutical industry, environmental measurement and bioremediation and chemical industry.

细胞色素P450BM-3来源于Bacillus megaterium，能催化长链脂肪酸C_(12-C_(20)的次末端(ω-1，ω-2，ω-3)羟化及不饱和脂肪酸的环氧化，其突变体催化的底物拓展到中链的脂肪酸C_8-C_(10、烷烃、环烷烃、杂环烃、多环芳烃等，因此在医药工业、环境检测和修复及化学工业具有广阔的前景。

Polycyclic aromatic hydrocarbons have already been verified into hydrocarbons with "mutagenesis, carcinogenesis and teratogenesis".

多环芳烃是指两个或者两个以上的苯环连在一起的一类化合物。

Results The two OHCB species in the defined consortia 22CO-6+PY97S and JZ9B+PY97S exhibited strong syntrophic effects in the oil biodegradation process. And the degradation rates of oil were increased from 27.81% and 83.52% to 64.03% and 86.89%, respectively. The consortia could degrade aliphatic and aromatic fraction at the same time, including high molecular weight-PAHs chrysene and its alkyl derivatives.

构建的降解菌群22CO-6+PY97S和JZ9B+PY97S中2种专性解烃菌具有明显的协同效应，它们可以使原油降解率从27.81%、83.52%分别提高到64.03%和86.89%，并且可以同时降解石油中的烷烃、芳香烃组分，包括高分子量多环芳烃chrysene及其衍生物。

NO 2、SO 2、H 2S、CO、Pb、Hg nonorganic pollutions impact heavily human health.

其中的NO2 、SO2 、H2 S、CO、Pb、Hg等无机污染对人类健康影响极大，目前引起人们普遍关注的是致癌多环芳烃和含N、S、O杂环有机污染物。

The relation of PAHs emission and Dioxin emission was discussed from theory and experimentation in this article, and it was indicated that PAHs could possibly synthesize Dioxin as an usher reagent.

本文还从理论和试验分别分析了多环芳烃排放和二恶英排放之间的关系，结果认为两种情况下多环芳烃都可能成为合成二恶英的前驱物。

Analysing datas of domestic and oversea, this paper discusses the use of alkanes and PAHs in the source analysis.

分析了国内外的资料，并结合几年来对北京地区的研究成果，讨论了饱和烃、多环芳烃等有机污染物在源解析方面的应用。

The fuel gas from the lime and the recovery furnace contains minor amounts of polyaromatic hydrocarbons compounds containing several aromatic tings.

石灰窑和回收炉燃料燃烧释放的气体中含有少量含有几种芳香烃的多环芳烃。

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。

Have carried on testing service for nearly 200 hazardous substances, including Asbestos, PAHs, Phthalates, NP/NPEO, AZO, CFC/HCFC/Halons, PVC, PCB, PCT, PCN, CP, Mirex, TPT/TBT/TBTO, Formaldehyde, Heavy metals, can help your products in fully compliance with 'green purchase' request of international buyers.

开展除RoHS以外的近200种有害物质检测业务，包括石棉、多环芳烃、邻苯二甲酸盐、壬基苯酚/壬基苯酚乙氧基化合物、偶氮染料、氟氯烷烃/氢氯氟烷烃/海龙、聚氯乙烯、多氯联苯、多氯三联苯、多氯化萘、短链氯化石蜡、灭蚊灵、三苯基锡类/三丁基锡类/二的氧化物、甲醛、重金属等，涉及范围完全满足各国际买家的&绿色采购&要求。

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。