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In some cases, they were either high-molecular-weight polymer or large aggregates of polynuclear aromatic molecules. 而积碳的性质极其复杂，它和形成的条件息息相关。
Many constituents are mutagens and carcinogenic such as alkenes, nitrosamines, polynuclear aromatic and heterocyclic hydrocarbons, amines . 烟草的很多成分都会引起有机体突变以及致癌;如烯烃化合物;亚硝胺;多核芳香烃以及多环碳氢化合物和铵.
Polynuclear Aromatic Hydrocarbons (PAHs) can be found in diverse areas of environment all over the world. 多环芳烃是一类广泛存在于环境中的有机污染物，有较强的致癌性。
Although the contents of tar in overripe leaves were remarkably low, the release amount of polynuclear aromatic hydrocarbon was as much as that in mellow leaves. 过熟烤烟烟叶的焦油含量虽然较低，但烟气的稠环芳烃类化合物总量与适熟烤烟差异并不明显，其中苯并[a]芘含量有明显升高的趋势。
Good separations of polynuclear aromatic compounds, alkylbenzenes, basic aromatic compounds, halobenzenes as well as lovastatin and simvastatin were achieved. 实验证明这种交联聚合包覆固定相对有机流动相和碱具有高稳定性。
Polynuclear aromatic hydrocarbons (PAHs) in particulate phases of the combustion products from liquefied petroleum oil gas and coal gas were determined. 色／质联机法鉴定了民用燃气（天然气、液化石油气和煤气）燃烧产物中半挥发性有机物，其主要成分为烷烃类化合物。
Four different condensed polynuclear aromatic (COPNA) resins were obtained by reacting different heavy residue oils with 1,4-benzenedimethanol and p-toluenesulfonic acid. 摘要以四种不同的油浆为原料，在酸性催化剂存在下，与对苯二甲醇反应，得到四种COPNA树脂。
The condensed polynuclear aromatic(COPNA)resin was synthesized by using coal tar pitch as monomer and trioxane as cross-linking agent in the presence of P-toluene sulfonic acid. 以煤沥青为原料、三聚甲醛为交联剂,在对甲苯磺酸的催化作用下合成缩合多环多核芳香烃(COPNA)树脂。
The condensed polynuclear aromatic (COPNA) resin was synthesized using coal tar pitch as monomer and terephthalic aldehyde as cross-linking agent in the presence of p-toluene sulfonic acid. 摘要以煤沥青为单体、对苯二甲醛为交联剂，在对甲苯磺酸的催化作用下合成缩合多核芳烃(COPNA)树脂。
The condensed polynuclear aromatic(COPNA) resin is synthesized using coal tar pitch as monomer and p-methyl benzaldehyde(PMB) as cross-linking agent in the presence of p-toluene sulfonic acid. 以煤沥青为单体、对甲基苯甲醛(PMB)为交联剂,在对甲苯磺酸的催化作用下合成缩合多核芳烃(COPNA)树脂。采用FT-IR和1H-NMR研究其反应机理;
The condensed polynuclear aromatic (COPNA) resin is synthesized using coal tar pitch as monomer and p-methyl benzaldehyde (PMB) as cross-linking agent in the presence of ptoluene sulfonic acid. 摘要以煤沥青为单体、对甲基苯甲醛(PMB)为交联剂，在对甲苯磺酸的催化作用下合成缩合多核芳烃(COPNA)树脂。
Aromatic terpenoids are dominant components in aromatic hydrocarbons and have the most content in the extracts and some conventional polynuclear aromatic hydrocarbons were also detected. 芳烃的主要组分是芳构化萜烷，其含量在萃取物中最高，还检出少量常规多环芳烃；
Birks J B.Photophysics of Aromatic Molecules[M].New York:Wileyinterscience,1970. 章立民，张月平.;芘与1;4-二氰基苯形成的三分子激基复合物
Simultaneously, a wide variety of lower-mass aromatic molecules emerge; these volatile compounds give coffee its familiar fragrance. 在此同时，有各式各样分子量较低的香味分子出现；这些挥发性化合物赋予了咖啡熟悉的香味。
pollution by polynuclear aromatic hydrocarbons 多环芳烃污染
polynuclear aromatic hydrocarbons 多环芳烃
polynuclear aromatic hydrocarbon 多核芳香烃
Determination of Polynuclear Aromatic Hydrocarbons in Ambient Air 环境空气中多环芳烃类测定方法研究
Test Method for Polynuclear Aromatic Hydrocarbons in Water 水中多环芳烃的试验方法
The drink was mixed with aromatic spices. 饮料中带有香料。