polycyclic aromatic hydrocarbon

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polycyclic aromatic hydrocarbon

[‚päl·ē‚sī·klik ‚ar·ə‚mad·ik ′hī·drə‚kär·bən]
(organic chemistry)
A compound containing two or more fused benzene rings such as naphthalene or anthracene.
References in periodicals archive ?
Currently in many countries including China, requirements on the limit of heavy metals have been included in the standards of agricultural land use, but the evaluation and monitoring of PAHs have not yet been incorporated in these standards (Tang, Tang, Zhu, Zheng, & Miao, 2005), leading to a lack of control for PAHs in soil.
Profile of Atmospheric PAHs in Rawalpindi, Lahore and Gujranwala Districts of Punjab Province (Pakistan), Aerosol and Air Quality Research, 16, 1010-1021.
The OSU study also showed that new PAH compounds found in coal tar sealcoats had a carcinogenic risk that was 4 percent to 40 percent higher than any study had previously showed.
It found the toxicity levels of PAHs are highest in winters.
According to the National Research Council's report Diet, Nutrition, and Cancer, studies show that laboratory animals develop tumors in the gastrointestinal tract lungs when they are exposed to PAHs in food.
Aquatic contamination of PAHs generally includes oil spillage and leakage of PAH-containing fluids (e.
In humans, these PAHs are considered most probable carcinogens based on the evidence of carcinogenicity in animals, and the probability that similarity in metabolic processes involved in dealing with PAHs exists in humans and animals.
The new maps showed that small, electrically neutral, irregularly shaped PAHs are most common near the cold molecular cloud that is far from the star that excites PAH emission.
We previously analyzed the dust samples from the first round of dust collection for nine PAHs (Whitehead et al.
The researchers sampled airborne PAHs to estimate exposure, and chose Fresno because of its relatively high air pollution levels.
Polycyclic aromatic hydrocarbons are a group of more than 100 multiple benzenic ring compounds with ubiquitous nature and 16 PAHs have been identified as priority pollutants by the US Environment Protection Agency [1].