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*  Polycyclic aromatic hydrocarbons - definition of Polycyclic aromatic hydrocarbons by The Free Dictionary
Define Polycyclic aromatic hydrocarbons. Polycyclic aromatic hydrocarbons synonyms, Polycyclic aromatic hydrocarbons pronunciation, Polycyclic aromatic hydrocarbons translation, English dictionary definition of Polycyclic aromatic hydrocarbons. n. Abbr. PAH Any of a class of carcinogenic organic molecules that consist of three or more benzene rings and are commonly produced by fossil fuel...
  http://www.thefreedictionary.com/Polycyclic+aromatic+hydrocarbons
*  Fetal Window of Vulnerability to Airborne Polycyclic Aromatic Hydrocarbons on Proportional Intrauterine Growth Restriction -...
Background: Although the entire duration of fetal development is generally considered a highly susceptible period, it is of public health interest to determine a narrower window of heightened vulnerability to polycyclic aromatic hydrocarbons (PAHs) in humans. We posited that exposure to PAHs during the first trimester impairs fetal growth more severely than a similar level of exposure during the subsequent trimesters.. Methods: In a group of healthy, non-smoking pregnant women with no known risks of adverse birth outcomes, ...
  http://ccceh.org/scientific-papers/fetal-window-of-vulnerability-to-airborne-polycyclic-aromatic-hydrocarbons-on-proportional-intrauterine-growth-restriction
*  The relationship between prenatal exposure to airborne polycyclic aromatic hydrocarbons (PAHs) and PAH-DNA adducts in cord...
In a birth cohort study, we have assessed the dose-response relationship between individual measurements of prenatal airborne polycyclic aromatic hydrocarbon (PAH) exposure and specific PAH-DNA adducts in cord blood adjusted for maternal blood adduct
  http://www.biomedsearch.com/nih/relationship-between-prenatal-exposure-to/23299301.html
*  Determination of Polycyclic Aromatic Hydrocarbons (PAHs) in edible oils - Institutional Repository @ UMS Library
Edible oils such as palm, corn and sunflower oils were analyzed for the presence of light and heavy polycyclic aromatic hydrocarbons (PAHs) using liquid-liquid extraction, clean-up on a silica gel column, and determination by High Performance Liquid Chromatography (HPLC) using a fluorescene detector. In this study, 15 PAHs compounds induding Napthalene, Acenapthene, Fluorene, Phenanthrene, Anthracene, Fluoranthene, Pyrene, Benzo[a]anthracene, Chrysene, Benzo[b]fluoranthene, Benzo[k]fluoranthene, Benzo[a]pyrene, Dibenz[a,h]anthracene, Benzo[g,h,i]perylene and Ideno[1,2,3-cd]pyrene were studied. The linearity of the method was between 0.9996 to 1.0000. Limit of detection (LOD) was ranged from 0.01 to 1.17 ng/g, whereas limit of quantification (LOQ) was ranged from 0.02 to 3.51 ng/g. All PAHs were separated and analyzed in 31 minutes. Com oil sample did not show any concentration of Benzo[a]anthracene, Chrysene, Benzo[a]pyrene and Benzo[b]fluoranthene (PAH4), whereas palm oil and sunflower oil ...
  http://eprints.ums.edu.my/9693/
*  Genetics of polycyclic aromatic hydrocarbon metabolism in diverse aerobic bacteria.
Abstract Polycyclic aromatic hydrocarbons (PAHs), which consist of two or more fused aromatic rings, are widespread in the environment and persist over long periods of time. The de..
  https://www.omicsonline.org/references/genetics-of-polycyclic-aromatic-hydrocarbon-metabolism-in-diverse-aerobic-bacteria-375482.html
*  Spatial covariation of microbial community composition and polycyclic aromatic hydrocarbon concentration in a creosote-polluted...
article{76d93444-52bd-4e4a-9e48-97e8ab47fe24, abstract = {Little is known about the spatial connection between soil microbial community composition and polycyclic aromatic hydrocarbon (PAH) concentration. A spatially explicit survey at a creosote-contaminated site demonstrated that microbial biomass (total concentration of phospholipid fatty acids [PLFAs]) and microbial community composition (PLFA fingerprints) were spatially autocorrelated, mostly within a distance of 25 m, and covaried with PAH concentrations. The concentration of PLFAs indicative of gram-negative bacteria (16:1 omega 7c, 16:1 omega 7t, 18:1 omega 7, cy17:0, and cy19:0) increased in the PAH hot spots, whereas PLFAs representing fungi and gram-positive bacteria (including actinomycetes) were negatively correlated to PAH concentrations. Most PLFAs were spatially autocorrelated, with distances varying between 4 and 25 m. Those PLFAs that increased in PAH-contaminated soil had autocorrelation ranges between 4 and 16 m, whereas ...
  https://lup.lub.lu.se/search/publication/1206430
*  Molecular Mechanisms of Polycyclic Aromatic Hydrocarbon-induced Teratogenesis in Zebrafish (Danio rerio)
p,Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants formed from the incomplete combustion of fossil fuels and are found in the environment as complex mixtures. PAHs are developmentally toxic to fish, causing yolk sac edema, hemorrhaging, craniofacial malformations and cardiac defects including impaired heart looping, elongated heart, decreased blood flow, and pericardial effusion. Previous research has shown that many of the toxic effects of PAHs are mediated through the aryl hydrocarbon receptor (AHR), which upregulates phase I and II metabolic genes, but the underlying mechanisms of PAH-induced toxicity are not yet known. The primary goal of this dissertation was to better understand the molecular mechanisms by which PAH mixtures cause developmental toxicity in fish. To this end, the zebrafish (Danio rerio) was used as a developmental model. Simple mixtures consisting of a PAH that is an AHR agonist (benzo[a]pyrene or benzo[k]fluoranthene) and a PAH that is ...
  https://dukespace.lib.duke.edu/dspace/handle/10161/5705?show=full
*  polycyclic aromatic hydrocarbon, polycyclic aromatic hydrocarbon wholesale for sale page1 in Tradezz.com
Looking for polycyclic aromatic hydrocarbon? Here you can find the lowest price products about polycyclic aromatic hydrocarbon. We Provide for you about polycyclic aromatic hydrocarbon page1
  http://www.tradezz.com/polycyclic-aromatic-hydrocarbon_0/
*  Histological alterations and polycyclic aromatic hydrocarbon exposure indicative bile fluorescence patterns in fishes from...
The Koggala lagoon is a coastal wetland affected by a major oil spill and other anthropogenic pollution sources. In this study, gill and liver histological alterations and polycyclic aromatic hydrocarbon (PAH) exposure indicative bile fluorescence patterns of the fish species inhabiting the lagoon were examined in order to explore the potential biological impacts. Fixed wavelength fluorescence patterns in the bile of Mugil cephalus, Lutjanus russellii and Etroplus suratensis showed bioavailability of naphthalene type-, phenanthrene type-, pyrene type- and benzo(a)pyrene type- metabolites indicating recent exposure of the fishes to petrogenic and pyrogenic PAHs. Histological analysis revealed the occurrence of prominent gill and liver lesions, especially in the tissues of M. cephalus and L. russellii. Of the fish species examined, which included 43 individual fishes, the liver tissues of M. cephalus (two fish) and L. russellii (one fish) displayed foci of hepatocellular alterations with ...
  https://jnsfsl.sljol.info/articles/abstract/10.4038/jnsfsr.v43i1.7916/
*  Combined Effects of Prenatal Polycyclic Aromatic Hydrocarbons and Material Hardship on Child IQ - ccceh.org
Importance: Polycyclic aromatic hydrocarbons are common carcinogenic and neurotoxic urban air pollutants. Toxic exposures, including air pollution, are disproportionately high in communities of color and frequently co-occur with chronic economic deprivation.. Objectives: We examined whether the association between child IQ and prenatal exposure to polycyclic aromatic hydrocarbons differed between groups of children whose mothers reported high vs. low material hardship during their pregnancy and through child age 5. We tested statistical interactions between hardships and polycyclic aromatic hydrocarbons, as measured by DNA adducts in cord blood, to determine whether material hardship exacerbated the association between adducts and IQ scores.. Design: Prospective cohort. Participants were recruited from 1998 to 2006 and followed from gestation through age 7 years.. Setting: Urban community (New York City). Participants: A community-based sample of 276 ...
  http://ccceh.org/scientific-papers/combined-effects-of-prenatal-polycyclic-aromatic-hydrocarbons-and-material-hardship-on-child-iq
*  Estimation of chronic personal exposure to airborne polycyclic aromatic hydrocarbons - ccceh.org
Background: Polycyclic aromatic hydrocarbons (PAH) exposure from solid fuel burning represents an important public health issue for the majority of the global population. Yet, understanding of individual-level exposures remains limited.. Objectives: To develop regionally adaptable chronic personal exposure model to pro-carcinogenic PAH (c-PAH) for the population in Kraków, Poland.. Methods: We checked the assumption of spatial uniformity in eight c-PAH using the coefficients of divergence (COD), a marker of absolute concentration differences. Upon successful validation, we developed personal exposure models for eight pro-carcinogenic PAH by integrating individual-level data with area-level meteorological or pollutant data. We checked the resulting model for accuracy and precision against home outdoor monitoring data.. Results: During winter, COD of 0.1 for Kraków suggest overall spatial uniformity in the ambient concentration of the eight c-PAH. The three models that we developed were ...
  http://ccceh.org/scientific-papers/estimation-of-chronic-personal-exposure-to-airborne-polycyclic-aromatic-hydrocarbons
*  Institute of Cancer Research Repository - Carcinogenic polycyclic aromatic hydrocarbons induce CYP1A1 in human cells via a p53...
The tumour suppressor gene TP53 is mutated in more than 50 % of human tumours, making it one of the most important cancer genes. We have investigated the role of TP53 in cytochrome P450 (CYP)-mediated metabolic activation of three polycyclic aromatic hydrocarbons (PAHs) in a panel of isogenic colorectal HCT116 cells with differing TP53 status. Cells that were TP53(+/+), TP53(+/-), TP53(-/-), TP53(R248W/+) or TP53(R248W/-) were treated with benzo[a]pyrene (BaP), dibenz[a,h]anthracene and dibenzo[a,l]pyrene, and the formation of DNA adducts was measured by P-32-postlabelling analysis. Each PAH formed significantly higher DNA adduct levels in TP53(+/+) cells than in the other cell lines. There were also significantly lower levels of PAH metabolites in the culture media of these other cell lines. Bypass of the need for metabolic activation by treating cells with the corresponding reactive PAH-diol-epoxide metabolites resulted in similar adduct levels in all cell lines, which confirms that the ...
  http://publications.icr.ac.uk/14887/
*  Repeatedly high polycyclic aromatic hydrocarbon exposure and cockroach sensitization among inner-city children - ccceh.org
However, there is limited evidence on whether these pollutants are associated with the development of cockroach sensitization, a strong risk factor for urban asthma. We hypothesized that repeatedly high PAH exposure during child-hood would be associated with increased risk of new cockroach sensitization.. Methods: As part of the research being conducted by the Columbia Center for Children's Environmental Health (CCCEH) birth cohort study in New York, a spot urine sample was collected from children at age 5 years (2003-2008) and again at age 9-10 years (2008-2012; n=248) and analyzed for 10 PAH metabolites. Repeatedly high PAH (High-High) exposure was defined as measures above median for age 5 PAH metabolites at both time points. Child blood samples at age 5 and 9 years were analyzed for total, anti-cockroach, mouse, dust mite, cat and dog IgE. Relative risks (RR) were estimated with multi-variable modified Poisson regression.. Results: Individual PAH metabolite levels, except for 1-naphthol ...
  http://ccceh.org/scientific-papers/repeatedly-high-polycyclic-aromatic-hydrocarbon-exposure-and-cockroach-sensitization-among-inner-city-children
*  Time trends of polycyclic aromatic hydrocarbon exposure in New York City from 2001 to 2012: assessed by repeat air and urine...
Indoor PAH (particle- and gas-phase) were collected for two weeks prenatally (n=98), at age 5/6 years (n=397) and age 9/10 years (n=198) since 2001 and at all three age-points (n=27). Other traffic-related air pollutants (black carbon and PM2.5) were monitored indoors simultaneous with PAH monitoring at ages 5/6 (n=403) and 9/10 (n=257) between 2005 and 2012. One third of the homes were selected across seasons for outdoor PAH, BC and PM2.5 sampling. Using the same sampling method, ambient PAH, BC and PM2.5 also were monitored every two weeks at a central site between 2007 and 2012. PAH were analyzed as semivolatile PAH (e.g., pyrene; MW 178-206) (∑8PAH(semivolatile): Including pyrene (PYR), phenanthrene (PHEN), 1-methylphenanthrene (1-MEPH), 2-methylphenanthrene (2-MEPH), 3-methylphenanthrene (3-MEPH), 9-methylphenanthrene (9-MEPH), 1,7-dimethylphenanthrene (1,7-DMEPH), and 3,6-dimethylphenanthrene (3,6-DMEPH)) and the sum of eight nonvolatile PAH (∑8PAH(nonvolatile): Including ...
  http://ccceh.org/scientific-papers/time-trends-of-polycyclic-aromatic-hydrocarbon-exposure-in-new-york-city-from-2001-to-2012-assessed-by-repeat-air-and-urine-samples
*  Polycyclic aromatic hydrocarbon exposure in oesophageal tissue and risk of oesophageal squamous cell carcinoma in north-eastern...
Results Cultured ESCC cells exposed to B[a]P in vitro showed dose-dependent staining with 8E11 but not with 5D11. With 8E11, sufficient epithelial tissue was available in the TMA cores to analyse 91 cases and 103 controls. Compared with the lowest quintile of 8E11 staining in the controls, adjusted ORs for the 2nd to 5th quintiles were 2.42, 5.77, 11.3 and 26.6 (95% CI 5.21 to 135), respectively (p for trend ,0.001). With 5D11, 89 cases and 101 controls were analysed. No association between staining and case status was observed (ORs for the 2nd to 5th quintiles were 1.26, 0.88, 1.06 and 1.63 (95% CI 0.63 to 4.21), p for trend=0.40). ...
  http://gut.bmj.com/content/59/9/1178
*  Plus it
3129 The exposure to ambient air pollution has negative health consequences including increased morbidity and mortality. Among other pollutants, ambient air contains particulate matter (PM). PM consists of dust, soot and other particles and various chemicals, including polycyclic aromatic hydrocarbons (PAHs). To investigate the role of PAHs and PM in oxidative stress induction we analyzed oxidative damage to DNA, lipids and proteins in human hepatoma cell line HepG2. Cells were exposed to several concentrations of individual carcinogenic PAHs (cPAHs, including benzo[a]pyrene (B[a]P), dibenzo[al]pyrene (DB[al]P), benzo[a]anthracene (B[a]A), benzo[b]fluoranthene (B[b]F), benzo[k]fluoranthene (B[k]F), chrysene, benzo[ghi]perylene (B[ghi]P), indeno[cd]pyrene (I[cd]P) and dibenzo[ah]anthracene (DB[ah]A)), an artificial mixture of cPAHs (cPAHs mix) and to organic extracts obtained from PM10 (PM , 10 µm) collected by high volume air samplers in summer 2001, winter 2001 and winter 2005 in Prague, ...
  http://cancerres.aacrjournals.org/content/68/9_Supplement/3129
*  검색어 aromatic hydrocarbons에서 총 716개 검색결과 : 해피학술
This paper proposes an analytical method for determining amounts of polycyclic aromatic hydrocarbons (PAHs; benzo[a]anthracene, chrysene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, dibenzo[a,h]anthracene, benzo[g,h,i] perylene) in ...
  http://www.happyhaksul.com/search/search.html?qt=aromatic+hydrocarbons
*  Adsorption of polycyclic aromatic hydrocarbons from wastewater by using silica-based organic–inorganic nanohybrid...
Article Adsorption of polycyclic aromatic hydrocarbons from wastewater by using silica-based organic–inorganic nanohybrid material. Polycyclic aromatic hydrocarbons (PAHs) are a group of priority pollutants, which are classified as persistent ...
  https://www.environmental-expert.com/articles/adsorption-of-polycyclic-aromatic-hydrocarbons-from-wastewater-by-using-silica-based-organic-inorgan-473877
*  Effects of Polycyclic Aromatic Hydrocarbons, Metals and Polycyclic Aromatic Hydrocarbon/Metal Mixtures on Rat Corpus Luteal...
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants that can be modified to oxygenated PAH (oxyPAHs) derivatives. It is well known that oxyPAHs tend to be much more reactive than their parent compounds. Toxicity can be attributed to direct interaction with target molecules or generation of reactive oxygen species (ROS). Metals are another class of contaminant found ubiquitously throughout the environment. Some metals are toxic at levels below the 1:1 ratio predicted by the biotic ligand model and are thought to manifest toxicity through ROS generation. Often metals and PAHs occur as co-contaminants in industrialized environments, yet little is known about their potential co-toxicity or mechanisms of action in mammalian reproductive function. Previously, we described that a PAH, 9, 10-phenanthrenequinone (PHEQ), inhibited LH-stimulated progesterone secretion in dispersed rat corpus luteal (CL) cells (Nykamp et al., 2001). Viability was decreased in CL cells ...
  https://uwspace.uwaterloo.ca/handle/10012/3390
*  Pilot Study of Polycyclic Aromatic Hydrocarbons in Surface Soils of Guiyang City, People's Republic of China on Environmental...
Article Pilot Study of Polycyclic Aromatic Hydrocarbons in Surface Soils of Guiyang City, People's Republic of China. Polycyclic aromatic hydrocarbons (PAHs) are a class of well-know roxic and carcinogenic compounds that are widely present in industr...
  https://www.environmental-expert.com/articles/pilot-study-of-polycyclic-aromatic-hydrocarbons-in-surface-soils-of-guiyang-city-people-s-republic-o-9547
*  Pleiotropic and epistatic behavior of a ring-hydroxylating oxygenase system in the polycyclic aromatic hydrocarbon metabolic...
Despite the considerable knowledge of bacterial high-molecular-weight (HMW) polycyclic aromatic hydrocarbon (PAH) metabolism, the key enzyme(s) and its pleiotropic and epistatic behavior(s) responsible for low-molecular-weight (LMW) PAHs in HMW PAH-metabolic networks remain poorly understood. In this study, a phenotype-based strategy, coupled with a spray plate method, selected a Mycobacterium vanbaalenii PYR-1 mutant (6G11) that degrades HMW PAHs but not LMW PAHs. Sequence analysis determined that the mutant was defective in pdoA2, encoding an aromatic ring-hydroxylating oxygenase (RHO). A series of metabolic comparisons using high-performance liquid chromatography (HPLC) analysis revealed that the mutant had a lower rate of degradation of fluorene, anthracene, and pyrene. Unlike the wild type, the mutant did not produce a color change in culture media containing fluorene, phenanthrene, and fluoranthene. An Escherichia coli expression experiment confirmed the ability of the Pdo system to ...
  https://www.semanticscholar.org/paper/Pleiotropic-and-epistatic-behavior-of-a-ring-hydro-Kweon-Kim/919598db74a44cfc361a4339ec609df9d436bd87
*  Prenatal Exposure to Airborne Polycyclic Aromatic Hydrocarbons and Children's Intelligence at 5 Years of Age in a Prospective...
PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.
  http://pubmedcentralcanada.ca/pmcc/articles/PMC2944097/
*  Abstract: Estimates of Atmospheric Deposition of Polycyclic Aromatic Compounds at Local and Regional Scales in the Athabasca...
To assess ecosystem health and cumulative environmental effects associated with mining activities in the Athabasca oil sands region, western Canada, a monitoring program was established in 2011 to measure polycyclic aromatic compounds (PACs), including 17 polycyclic aromatic hydrocarbons (PAHs), 21 alkylated PAHs, and 5 parent and alkylated dibenzothiophenes (DBTs) at 17 passive and three active sampling sites. One of the primary deliverables of this project is to provide estimated total deposition of various pollutants at local and regional scales. A dry deposition framework was developed to estimate dry deposition of PACs, and was first applied to the three active sampling sites. Modelled dry deposition velocities for various gaseous PACs and over various land covers surrounding the three sites were mostly in the range of 0.01-0.5 cm s-1 with median and annual mean values between 0.08 and 0.24 cm s-1, comparable with literature values obtained from field studies. Annual ...
  https://ams.confex.com/ams/97Annual/webprogram/Paper305569.html
*  β-cyclodextrin as a stationary phase for the group separation of polycyclic aromatic compounds in normal-phase liquid...
Author: Panda, S. K. et al.; Genre: Journal Article; Published in Print: 2006; Keywords: beta-cyclodextrin stationary phase; FT-ICR-mass spectrometry; polycyclic aromatic sulfur heterocycles; fossil fuel; vacuum gas oil; Title: β-cyclodextrin as a stationary phase for the group separation of polycyclic aromatic compounds in normal-phase liquid chromatography
  http://pubman.mpdl.mpg.de/pubman/faces/viewItemOverviewPage.jsp?itemId=escidoc:1469210
*  "An On-line Test for Polycyclic Aromatic Hydrocarbons in the Flue Gas f" by Wenjun Han
Polycyclic Aromatic Hydrocarbons (PAHs) are environmental pollutants that have received considerable attention because of their carcinogenic and mutagenic effects. Due to the extensive amount of data suggesting the hazards of these compounds, 16 PAHs are on the Environmental Protection Agency (EPA) Priority Pollutant List. These compounds are often emitted into the atmosphere by way of combustion processes. Thus, analysis of these compounds during coal combustion is an important task. Three 1000-hour coal combustion burns were performed using the 0.1 MW (0.3 m) bench-scale Fluidized Bed Combustor (FBC) in the Combustion Laboratory at Western Kentucky University. The data for this thesis were collected from the second and third 1000-hour experiments. An in-situ sampling system was designed for 16 PAHs specified by EPA, which consisted of a glass wool filter, condenser, glass fiber filter, Teflon filter, and Tenax. The filters and Tenax were extracted by methylene chloride and hexane, ...
  https://digitalcommons.wku.edu/theses/781/