芳烃

Licorice root acid in licorice root with other constitutive chemical combination after burning, may come into being many ring aromatic hydrocarbons having carcinogenesis.

甘草中的甘草酸在燃烧后，与其他成分化合，可生成有致癌作用的多环芳烃。

The complexing properties of compounds 10a, 10b, 11a and 11b toward alkali metal ions were studied by 〓H NMR titration, ESI-MS, UV-Vis spectra, Fluoresence spectra and liquid-liquid extraction. The results show:(1) the 1:1 complexes were formed.(2) The calix-crown 10a, 11a have a higher selectivity for Na〓 ions, whereas 10b, 11b for K〓 ions.(3) The complexing ability toward alkali metal ions was enhanced when the calix-crown have side arm carbonyl.(3) The coordination of alkali metal ions toward phenoxy, carbonyl and crown ethereal oxygens take place by rotation around the carbon-carbon bond of carbonyl and methylene.

六，用〓H NMR滴定，ESI-MS，UV-Vis，Fluorescence，液-液萃取实验研究了10a，10b，11a和11b对金属离子的配位性质，研究结果表明：1）杯芳烃冠醚衍生物同碱金属离子形成了1：1配合物，化合物10a、11a对Na〓具有较高的配位能力，化合物10b、11b对K〓具有较高的配位能力；2）在杯冠醚环的旁边引入带有羰基氧原子的基团作为侧臂参与配位可以加强对碱金属离子的配位能力；3）金属离子分别同苯酚氧，羰基氧，聚氧醚链氧发生了配位，配位过程中侧链基团涉及到了羰基碳与亚甲基碳的碳碳键的旋转过程。

It is well known that aromatics are key raw materials and important starting materials for many intermediates and petrochemicals, playing an important role in the modern national economy, benezene, toluene and xylenes in particular.

芳烃是重要的基本有机化工原料，尤其是苯、甲苯和二甲苯，在现代国民经济中有着极其重要的地位和作用。

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。

The main product has :70 - 90 # back to road asphalt, and a variety of aromatic naphthenic base oil, rubber oil mill, oil slurry, such as petroleum coke.

主要销售的产品有：70--90#重交道路沥青，以及各种环烷基芳烃油、轧胶油、油浆、石油焦等。

The majority of PAH_s with serious carcinogen is the heavy one that are mainly sorbed on fine inhalable particles with a high concentration on airborne particles of sub-micron diameters, which can be deposited in the respiratory tract, hence, increasing the potential health effects.

大多数强致癌性的PAH_s为能吸附在微小颗粒物上(高浓度的PAH_s集中在亚微直径颗粒物上)的大分子多环芳烃，并通过人的呼吸道进入人体，在呼吸气管上沉积，危害人体健康。

For PAHs are liable to be sorbed by soil solids, the plant and microbial availability of PAHs in soils is a major limiting factor of phytore-mediation efficiencies.

植物修复及其强化技术在土壤多环芳烃等有机污染修复中有较大的应用潜力。

The digestion and composting could obviously reduce PAHs contents,and change the distribution pattern of PAHs in sludges.

其中消化、堆肥处理可明显降低污泥中多环芳烃的含量，并改变污泥中PAHs的分布模式。

Samples were collected in lab for civil coal combustion and in field for coke plant and petroleum asphalt, 13 polycyclic aromatic hydrocarbons were determined by GC/MS.

利用模拟实验采集了民用燃煤污染源样品，在现场采集了焦化厂和石油沥青两类污染源样品，用GC MS联用技术测定了样品中 13种多环芳烃。

This is a second, but indirect, way in which PAHs can cause cancer.

& &这是第二次，但间接的方式多环芳烃可以导致癌症。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。