Polycyclic aromatic hydrocarbons (PAHs) are one class of organic pollutants that are considered the most hazardous due to their toxic, mutagenic, and carcinogenic properties [ 1 ]. (omicsonline.org)
PAHs could be degraded by bacteria under aerobic conditions through the initial oxidation of the aromatic ring, which is catalyzed by the dioxygenase enzyme. (omicsonline.org)
Food can be contaminated by PAHs because of the contamination of air, water or soil, and during industrial process, as heating, drying and Polycyclic aromatic hydrocarbons (PAHs) are a group of over 200 smoking process. (bvsalud.org)
PAHs were found in different foodstuffs, including different organic compounds with two or more fused aromatic rings vegetables, fruit, cereals, oils and fats, smoked fish and meat, coffee and ( Domingo & Nadal, 2015 ). (bvsalud.org)
Abstract Water samples were collected monthly from five stations along the middle part of Shatt Al Arab river during the low tide period from December , 2012 to November , 2013 to determine the concentrations , distribution and sources of hydrocarbons compounds in water samples. (docslib.org)
Long term exposure to hydrocarbon compounds can cause various disturbances in human life in terms of comfort and health (Azhari et al , 2011). (docslib.org)
a large amount of aromatic and heavy asphalthenic substances , while organisms mostly contain n-alkanes with an odd number of carbon atoms , a least amount of aromatic compounds , and no asphalthenic substances (Ali et al. (docslib.org)
The aims of the present study are to determine the concentrations of different hydrocarbon fractions in water , and to identify the major sources of hydrocarbons compounds in water to give baseline data for further work, and to evaluate the water quality of Shatt Al-Arab river. (docslib.org)
The last two chapters on polynuclear aromatic hydrocarbons and heterocyclic compounds, though not exactly the part of the curriculum of chemistry of natural products, but are essential to understand the chemistry of natural products. (researchandmarkets.com)
Special care has been taken to elaborate IUPAC nomenclature of certain chemical classes like steroids, eicosanoids, polycyclic aromatic compounds and heterocyclic compounds. (researchandmarkets.com)
This property led to the term "aromatic" for this class of compounds, and hence to "aromaticity" being the eventually discovered electronic property of them. (newworldencyclopedia.org)
The first known use of the word "aromatic" as a chemical term-namely, to apply to compounds that contain the phenyl radical-occurs in an article by August Wilhelm Hofmann in 1855. (newworldencyclopedia.org)
DEP are complicated particles consisting of carbonaceous nuclei and a vast number of organic chemical compounds such as polyaromatic hydrocarbons, aliphatic hydrocarbons, heterocycles, and quinones. (ersjournals.com)
In addition to summarizing the broader evidence-base specific to WOS, we include discussion of the NIH-funded Breast Cancer and the Environment Research Program (BCERP) which included population-based and basic science research focused on specific WOS to evaluate associations between breast cancer risk and particular classes of endocrine-disrupting chemicals-including polycyclic aromatic hydrocarbons, perfluorinated compounds, polybrominated diphenyl ethers, and phenols-and metals. (biomedcentral.com)
Polychlorinated biphenyls1
2018. Utilizing ion mobility spectrometry and mass spectrometry for the analysis of polycyclic aromatic hydrocarbons, polychlorinated biphenyls, polybrominated diphenyl ethers and their metabolites. (nih.gov)
Petroleum1
1981. Microbial degradation of petroleum hydrocarbons: An environmental perspective. (cdc.gov)
Exposures2
NIOSH recommends keeping exposures to airborne polynuclear aromatic hydrocarbons (PNAs) as low as feasible. (cdc.gov)
She was an early champion of the need to protect workers against occupational cancer hazards, especially those identified through her pioneering research on polycyclic aromatic hydrocarbon (PAH) and coal tar exposures in coke ovens. (who.int)
Aliphatic1
2018. Occurrence, distribution and composition of aliphatic and polycyclic aromatic hydrocarbons in sediment cores from the Lower Fox River, Wisconsin, US. (nih.gov)
This commonly-seen model of aromatic rings, namely the idea that benzene was formed from a six-membered carbon ring with alternating single and double bonds (cyclohexatriene), was developed by Friedrich August Kekulé von Stradonitz . (newworldencyclopedia.org)
Contaminants utilized as COS challenges represent a wide range of chemical species including polynuclear aromatic hydrocarbons (benzo-a-pyrene and naphthalene), aromatic hydrocarbons (benzene), organic acids (acetic acid), ketones (acetone), esters (diethyl phthalate), refractory hydrocarbons (methane), hydrogen sulfide, and carbon monoxide. (sae.org)
Contamination2
The Gulf Coast Fund-a regional fund and network founded in 2005 and active throughout the entire impacted area-and its partners are seeking to inventory the extent of BP Crude and other hydrocarbon contamination along the coastal areas as a result of Hurricane Issac. (leanweb.org)
The letter called on the EPA to "assure that contamination is assessed and remediated and that future leaks of cyanide, zinc, polynuclear aromatic hydrocarbons are contained," and specifically asked the agency to look into the risks posed by solvent landfills and percolation ponds. (senate.gov)
Pyrene1
The relative potencies of benzor[a]pyrene and a complex mixture of polycyclic aromatic hydrocarbons (PAH) produced as by-products of manufactured gas plant (MGP) residues as inducers of hepatic microsomal ethoxyresorufin O-deethylase (EROD) were determined in the B6C3F1mouse. (houstonmethodist.org)
Crude4
The BP Crude Oil contains residual levels of toxic Polynuclear Aromatic Hydrocarbons. (leanweb.org)
Remember do not come in contact with the BP Crude or hydrocarbon material in the environment. (leanweb.org)
She said fishermen like Dixon were sent out to set up booms against the advancing oil and to pick up absorbent booms that were soaked with hydrocarbons and they lean over the crude oil slick for many hours, coming down with nausea, dizziness and respiratory problems. (peoplesworld.org)
Ninety-six percent of America's paved roadways are asphalt, a substance composed of molecules, mostly polynuclear aromatic hydrocarbons, extracted from crude oil at the refinery. (howstuffworks.com)
Soils2
Officials say soils at the site are contaminated with polynuclear aromatic hydrocarbons and metals. (rockrivertimes.com)
In addition further reference may be made to BS EN 144-1:2009 + A1:2012 for the testing of aggregates and BS 1377:2018 for soils for civil engineering purposes. (chemtest.com)
Esters1
The researchers say evidence for cooked carbohydrates is confirmed by both the cracked/roasted starch granules observed microscopically and the molecular evidence for cooking and exposure to wood smoke or smoked food in the form of a range of chemical markers including methyl esters, phenols, and polynuclear aromatic hydrocarbons found in dental calculus. (york.ac.uk)
Polyaromatic1
1986. Polyaromatic hydrocarbon profile of a mineral oil (JBO-P) by gas chromatography. (cdc.gov)
Chemical1
Ironically, many of the most odoriferous organic substances known are terpenes, which are not aromatic in the chemical sense. (newworldencyclopedia.org)
19931
1993. Increases in polycyclic aromatic hydrocarbon content and mutagenicity in a cutting fluid as a consequence of its use. (cdc.gov)
Oxidation1
The COS prototype, in which emissions are pumped into the catalytic reactor and VOC oxidation performance is evaluated using an integrated Total Hydrocarbon Analyzer (THA), was designed to easily adapt to a variety of WMS processes. (sae.org)
Chemistry1
Over the next few decades, most chemists readily accepted this structure, since it accounted for most of the known isomeric relationships of aromatic chemistry. (newworldencyclopedia.org)
Study1
A study of polynuclear aromatic hydrocarbons on an amino bonded phase " by Dori Karlesky, Dennis C. Shelly et al. (lsu.edu)
Sources1
The potential exists for hydrocarbon material from sources other than the BP spill, such as leaking wells, storage tanks, and pipelines, to contaminate the environment as a result of Hurricane Issac. (leanweb.org)
Method1
and (2) Dioxins/furans (D/F) and polynuclear aromatic hydrocarbons (PAH) using EPA Method 23 in support of a national emission standard for hazardous air pollutants (NESHAP) for the Integrated Iron and Steel Manufacturing category. (epa.gov)
Found1
hydrocarbon found among all types of oils, with the highest median values. (bvsalud.org)
Agents1
Subra says the workers are inhaling "polynuclear aromatic hydrocarbons, known cancer causing agents that have additional heart and lung impacts. (peoplesworld.org)
Class1
Curved π-conjugated polycyclic aromatic hydrocarbons, buckybowls, constitute an important class of materials with wide applications in materials science. (nature.com)
Polycyclic aromatic hydrocarbons in fish: Exposure assessment for Kuwaiti consumers after the Gulf oil spill of 1991. (cdc.gov)
Properties1
Our controlled design of non-alternant, heteroatom-doped polycyclic aromatic frameworks with established bottom-up fabrication techniques opens new opportunities in the synthesis of carbon nanostructures with the perspective of engineering properties of graphene-based devices. (nature.com)