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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The program differs from the previous round of testing conducted in 2002 in that it is specifically aimed at finding and testing dust for polycyclic aromatic hydrocarbons, lead, asbestos, and manmade vitreous fibers, four substances that the EPA's top scientists have said are prevalent toxins contained in the WTC dust and act as an "fingerprint" differentiating WTC from urban dust which can also contain contaminants. In April, the Center for Children's Environmental Health at Columbia University released findings concluding that children exposed to combustion-related pollutants known as polycyclic aromatic hydrocarbons (PAH) in the womb are 2. A 2004 study performed by the Columbia Center for Children's Environmental Health found that children prenatally exposed to polycyclic aromatic hydrocarbons (PAHs)--the combustion byproducts of traffic and industrial exhaust--and postnatally exposed to tobacco smoke had a higher risk of coughing and wheezing at their first birthday, and of difficulty breathing and having symptoms of asthma at age two. |
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