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polycyclic naphthene 多环环烷
Polycyclic aromatic hydrocarbons are a group of ubiquitous pollutants. 摘要多环芳烃是一类普遍存在的环境污染物。
On Earth, polycyclic aromatic hydrocarbons are found on burnt toast and in automobile exhaust. 在地球上，可以在烤土司和汽车尾气中找到多环芳烃。
In conversion comparison method, the leak is found by looking at the naphthene conversion. 转化率比较法是根据特定环烷烃的转化率来判断;
In species of Pinus which are polycyclic flower initiation must occur over a wide time range. 具有多环球花的松树属种，其花的孕育期会延续较长的时间。
In species of pines which are polycyclic flower initiation must occur over a wide time range. 具有多环球花的松树属种,其花的孕育期会延续较长的时间。
Incense is burnt in many Chinese homes and polycyclic aromatic hydrocarbons have been recovered from incense smoke. 很多中国人家里点香，香的烟中已经发现有多环芳香族碳氢化合物。
Nitrated Polycyclic aromatic hydrocarbons are a class of important pollutants with direct mutagenicity. 硝基多环芳烃是一类重要的具有直接致突变性的环境污染物。
The polycyclic aromatic hydrocarbons(PAHs) in soil have serious latent danger to our human health. 土壤中的多环芳烃对人体健康具有潜在的危害。
The polycyclic development of geosynclinal belts is controlled by the cyclicity of subduction during e geological time. 地质时期地槽的多旋回发展受到俯冲作用旋回的控制。
Polycyclic aromatic compounds which are widespread in water, soil and atmosphere are harmful to human health. 摘要多环芳香化合物广泛分布于水体、土壤和大气中，对人类的健康造成了严重的危害。
For hydrocarbons with similar relative molecular weight, the KL values of paraffin, naphthene and aromatics decrease in order. 对于相对分子质量近似的烃，烷烃KL值>环烷烃KL值>芳烃KL值；
A new type of oil - soluble imidazole corrosion delay agent has been Synthesized from naphthene acid and organic amine . 以环烷酸、有机胺为原料合成咪唑啉油溶性缓蚀剂。
Advances in research on polycyclic hydrocarbons (PAHs) in coal-fired fluidized bed are reviewed with 33 references. 比较系统地讨论了燃煤流化床多环芳烃的研究现状。
Fat drippings create smoke that is filled with carcinogenic polycyclic aromatic hydrocarbons, or PAHs. 烧烤时滴落的脂肪会产生充满多环芳烃(PAH)的烧烤烟。
The results also show Liaohe oil aloes turn heavier fr om low sulphur middle-paraphin base to low sulphur naphthene middle base. 分析结果同时也证明，辽河原油确实在变重，由低硫中间-石蜡基向低硫环烷-中间基方向发展。
The analytical methods of polycyclic aromatic hydrocarbons(PAHs) in different samples,e.g. 介绍了环境样品(水和土壤)以及植物油中痕量多环芳烃的分析检测方法。
Because of the polycyclic tectonic movements, there are polycyclic oil and gassuperimposed basins in south China. 多旋回构造运动形成了多旋回发育的含油气叠合盆地。
Charcoal-grilled foods contain a comparatively higher level of Polycyclic Aromatic Hydrocarbons(PAHs). 碳烧食物所含的多环芳香族碳氢化合物通常相对较高。
Results: Some sorts of perchlorinated polycyclic aromatic hydrocarbon and methylsilsesquixane were synthesized. 合成得到了全氯化多环芳烃和硅倍半氧烷。