Hydrocarbons and aromatic. Medical search. Frequent questions

This fact sheet answers the most frequently asked health questions about polycyclic aromatic hydrocarbons (PAHs). (cdc.gov)
Polycyclic aromatic hydrocarbons (PAHs) are a group of over 100 different chemicals that are formed during the incomplete burning of coal, oil and gas, garbage, or other organic substances like tobacco or charbroiled meat. (cdc.gov)
What happens to polycyclic aromatic hydrocarbons (PAHs) when they enter the environment? (cdc.gov)
How might I be exposed to polycyclic aromatic hydrocarbons (PAHs)? (cdc.gov)
How can polycyclic aromatic hydrocarbons (PAHs) affect my health? (cdc.gov)
How likely are polycyclic aromatic hydrocarbons (PAHs) to cause cancer? (cdc.gov)
Is there a medical test to show whether I've been exposed to polycyclic aromatic hydrocarbons (PAHs)? (cdc.gov)
Polycyclic aromatic hydrocarbons (PAHs) are a group water after a period of weeks to months. (cdc.gov)
Polycyclic aromatic hydrocarbons (PAHs) could play an important role in astrochemistry as catalysts for formation of molecular hydrogen, the most abundant molecule in the universe and the key species for formation of more complex chemical compounds under interstellar conditions. (europa.eu)
A facile one-step approach to fabricate substrates for surface-enhanced Raman scattering ( SERS ) detection of polycyclic aromatic hydrocarbons (PAHs) was explored by reduction of silver nitrate with humic acids (HAs). (rsc.org)
More importantly, it compares favorably to Ag NPs prepared by the usual sodium citrate method, HAs-Ag NPs show excellent SERS activity for PAHs and display a remarkable capacity to absorb aromatic molecules through presumed π-π stacking interactions. (rsc.org)
In this dissertation, I present electronic spectra of a few polycyclic aromatic hydrocarbons (PAHs): tetracene, pentacene, pyrene, benzo[g,h,i]perylene and benzo[a]pyrene using resonantly enhanced multiphoton ionization (REMPI) and zero kinetic energy (ZEKE) photoelectron spectroscopy. (oregonstate.edu)
Exposure to polycyclic aromatic hydrocarbons (PAHs) in foundry workers has been evaluated by determination of benzo(a)pyrene-serum albumin adducts and urinary 1-hydroxypyrene. (bmj.com)
Dose-response relations between total PAH, pyrene, carcinogenic PAHs, and 1-hydroxypyrene for smokers, and polycyclic aromatic hydrocarbons adsorbed to dust for non-smokers are suggested. (bmj.com)
Nine structurally different polycyclic aromatic hydrocarbons (PAHs) were tested for their ability to either agonize or antagonize the human androgen receptor (hAR) in a sensitive reporter gene assay based on CHO cells transiently cotransfected with a hAR vector and an MMTV-LUC vector. (dtu.dk)
Polycyclic aromatic hydrocarbons (PAHs) have endocrine disrupting properties and they cross the placental barrier, but studies on gestational exposure and child anthropometry are inconclusive. (lu.se)
The morphologies of heterogeneous clusters of polycyclic aromatic hydrocarbons (PAHs) are investigated using molecular modelling. (ntu.edu.sg)
Determination of Polycyclic Aromatic Hydrocarbons (PAHs) on Fresh Water Samples from Egbema in Ogba/Egbema/Ndoni L.G.A. in Rivers State. (ijaar.org)
Nine dissimilar biochars, produced from varying feedstock at different pyrolysis temperatures, are appraised with respect to concentrations of potentially toxic elements, specifically, metals, metalloids and polycyclic aromatic hydrocarbons (PAHs). (uea.ac.uk)
Polycyclic aromatic hydrocarbons (PAHs) are of great importance from the aspect of fundamental sciences as well as materials science, especially in organic electronics. (elsevierpure.com)
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)
Ecological and health risk assessments of polycyclic aromatic hydrocarbons (PAHs) in soils around a petroleum refining plant in China: A quantitative method based on the improved hybrid model. (bvsalud.org)
Polycyclic aromatic hydrocarbons (PAHs) are extensively released into the environment by petroleum refining activities, predominantly affecting soil as a major reservoir . (bvsalud.org)
A review of airborne polycyclic aromatic hydrocarbons (PAHs) and their human health effects. (bvsalud.org)

Research on thermal rearrangements of aromatic hydrocarbons has since been expanded to isomerizations and automerizations of benzene and polycyclic aromatic hydrocarbons. (wikipedia.org)
Kinetic data and 13C-labeling have been used to elucidate the correct mechanism, and have led organic chemists to believe that one of the benzene ring contractions is the most likely mechanism through which these isomerizations of aromatic hydrocarbons occur. (wikipedia.org)
So here we're gonna say aromatic compounds have a benzene ring in common. (pearson.com)
And if you want to take organic to eventually, you're gonna realize that when you get to organic to there are actually a few chapters entirely devoted to just benzene and compounds, just like benzene, aromatic compounds. (pearson.com)
Formation of SOA from the aromatic species toluene, xylene, and, for the first time, benzene, is added to a global chemical transport model. (harvard.edu)
As a result, benzene is estimated to be the most important aromatic species with regards to global formation of SOA, with a total production nearly equal that of toluene and xylene combined. (harvard.edu)

Exposure of iron foundry workers to polycyclic aromatic hydrocarbons: benzo(a)pyrene-albumin adducts and 1-hydroxypyrene as biomarkers for exposure. (bmj.com)

Polycyclic aromatic hydrocarbons (PAH) consist of compounds composed of carbon and hydrogen in the form of aromatic rings. (nematictech.com)
Since polyaromatic hydrocarbons are grouped under a large number of different compounds, some tests only provide exposure insight into one PAH. (nematictech.com)
Tar remover contains compounds called hydrocarbons. (medlineplus.gov)

Thermal oxidation of polycyclic aromatic hydrocarbons adsorbed on alumina. (sjweh.fi)

One- to four-ring aromatic components of the exhaust emissions are predominately in the gas phase when sampled at 200 °C. The major aromatic components of the exhaust are toluene, phenylacetylene, styrene, indene, naphthalene, methylnaphthalenes and acenaphthalene. (edu.au)

Classifying Polycyclic Aromatic Hydrocarbons by Carcinogenic Potency Using In Vitro Biosignatures [ Abstract Classifying Polycyclic Aromatic Hydrocarbons by Carcinogenic Potency Using In Vitro Biosignatures ] [ Synopsis Classifying Polycyclic Aromatic Hydrocarbons by Carcinogenic Potency Using In Vitro Biosignatures ] Chang Y, Huynh CTT, Bastin KM, Rivera BN, Siddens LK, Tilton SC. (nih.gov)

Atmospheric concentrations of flame retardants, polycyclic aromatic hydrocarbons, and pesticides were measured using passive air samplers equipped with polyurethane foam disks to find spatial information in and around Chicago, Illinois. (uiowa.edu)

Exposure to polycyclic aromatic hydrocarbons usually occurs by breathing air contaminated by wild fires or coal tar, or by eating foods that have been grilled. (cdc.gov)

The conducted research showed that in the case of heavily contaminated soils (e.g. from the Glasgow waste landfi ll) the penetration of aromatic and aliphatic hydrocarbons can be signifi cantly reduced. (cementwapnobeton.pl)
The part of aliphatic hydrocarbons, that migrated into the penetrating solutions during whole measurements time, did not exceed the standard requirements. (cementwapnobeton.pl)

All-atom MD simulations with explicit water were used to investigate the mechanistic details of association of model aromatic hydrocarbon guest molecules, naphthalene (NPH), and its derivatives, with 3rd - 6th generation (G3-G6) dendrimers. (confex.com)
In the fossil fuel industries, hydrocarbon refers to naturally occurring petroleum , natural gas and coal , or their hydrocarbon derivatives and purified forms. (wikipedia.org)

Long-Term Fate of Polychlorinated Biphenyls and Polycyclic Aromatic Hydrocarbons in an Agricultural Soil. (lancs.ac.uk)

Contamination of ground waters with water-soluble aromatic hydrocarbons, common components of petroleum pollution, often produces anoxic conditions under which microbial degradation of the aromatics is slow. (umass.edu)
Saturated hydrocarbons are the basis of petroleum fuels and may be either linear or branched species. (wikipedia.org)

Some proposed applications involve dendrimer interactions with aromatic and hydrophobic hydrocarbons, or molecules containing moieties with these properties. (confex.com)

It is concluded that the photolysis of aromatic hydrocarbons adsorbed on the interstellar dust grains contributes a negligible fraction to the abundance of small hydrocarbons in the interstellar medium. (astrobiology.com)
Employing incoherent broadband cavity enhanced absorption spectroscopy (IBBCEAS), the spectra were found to be unstructured with a general lack of isolated features suggesting that the extinction was not solely based on absorption but was in fact dominated by scattering from particles formed in the photolysis of the respective polycyclic aromatic hydrocarbon. (ucc.ie)

ISO 22155:2011 specifies a static headspace method for quantitative gas chromatographic determination of volatile aromatic and halogenated hydrocarbons and selected aliphatic ethers in soil. (iso.org)

In this paper, the high temperature (65-75°C) biodegradation of aliphatic and aromatic hydrocarbons is investigated and kinetic parameters are derived. (iwaponline.com)
It is shown that efficient phenol biodegradation is essential for high temperature hydrocarbon degradation because some microorganisms tend to transform phenols into polyphenols which are very inhibitory for microbial growth. (iwaponline.com)
In a separate experiment the influence of the hydrocarbon droplet size on the biodegradation is investigated at 70°C using a newly isolated Thermus sp. (iwaponline.com)
Stimulated anoxic biodegradation of aromatic hydrocarbons using Fe(III) ligands. (umass.edu)

For instance, PAH's with 4 to 5 rings are more toxic than those with only 2 to 3 aromatic rings. (nematictech.com)
The concentration of Polycyclic Aromatic Hydrocarbons (PAH's) and physicochemical parameters were determined. (ijaar.org)

Until then, emissions of aromatic hydrocarbons from phytoplankton were evident. (vaughantoday.ca)
The polycyclic aromatic hydrocarbon (PAH) composition of a diesel fuel and the exhaust emissions obtained from the fuel in a diesel vehicle driven on a chassis dynamometer have been determined by high resolution gas chromatography. (edu.au)
Nelson, PF 1989, ' Combustion-generated polycyclic aromatic hydrocarbons in diesel exhaust emissions ', Fuel , vol. 68, no. 3, pp. 283-286. (edu.au)

A yield coefficient Y X/S of about 0.8 g (biomass)/g (hydrocarbons) was calculated in this experiment. (iwaponline.com)

The HTML version https://www.atsdr.cdc.gov/csem/polycyclic-aromatic-hydrocarbons/cover-page.html provides content through the Internet. (cdc.gov)

In organic chemistry , a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon . (wikipedia.org)
Okamoto, H 2019, Organic chemistry of π-conjugated polycyclic aromatic hydrocarbons: Acenes and phenacenes . (elsevierpure.com)

Aromatic species yield more SOA when they react with OH in regions where the \([NO]/[HO_2]\) ratios are lower. (harvard.edu)
: 623 The most general form of saturated hydrocarbons, (whether linear or branched species, and whether with without one or more rings) is C n H 2 n +2(1- r ) , where r is the number of rings. (wikipedia.org)
Effect of species composition on polycyclic aromatic hydrocarbon (PAH) accumulation in urban forest soils of Krakow. (sciendo.com)

This CSEM focuses on the toxicity of polycyclic aromatic hydrocarbons. (cdc.gov)
Two versions of the Toxicity of Polycyclic Aromatic Hydrocarbons CSEM are available. (cdc.gov)
Take the Initial Check to assess your current knowledge about the toxicity of polycyclic aromatic hydrocarbons. (cdc.gov)
The number of aromatic rings possessed by a polyaromatic hydrocarbon is correlated to its toxicity. (nematictech.com)

This goal has been obtained by combining different inorganic and organic chemical proxies such as trace elements, polycyclic aromatic hydrocarbons, and lead isotope ratios and exploiting both principal component and factor analysis to associate chemical proxies to human-driven contamination processes. (springer.com)

This group of hydrocarbons are produced when substances that cause pollution, such as coal, oil, and gasoline, are burned. (nematictech.com)

In order to monitor for polyaromatic hydrocarbons, Nematic Technologies has created a wearable chemical monitor that is capable of detecting polyaromatic hydrocarbons. (nematictech.com)

This so-called IOM sampler was designed to meet the criteria for inhalable dust (EN 481). (rsc.org)

Three short sediment cores have been exploited to this aim and characterized in terms of major and trace elements, polycyclic aromatic hydrocarbons, and lead isotope ratios. (springer.com)

The reevaporation of polycyclic aromatic hydrocarbons (PAH) from secondary alumina (alumina used in a fluidized bed for pot gas cleaning) used in the production of aluminum in aluminum reduction plants has been studied. (sjweh.fi)

These reactions can be categorized in two major types: one that involves a complete and permanent skeletal reorganization (isomerization), and one in which the atoms are scrambled but no net change in the aromatic ring occurs (automerization). (wikipedia.org)

Thermal rearrangements of aromatic hydrocarbons are considered to be unimolecular reactions that directly involve the atoms of an aromatic ring structure and require no other reagent than heat. (wikipedia.org)
The first proposed mechanism for a thermal rearrangement of an aromatic compound was for the automerization of naphthalene. (wikipedia.org)
This is currently the preferred mechanism and is as follows: The isomerization of unsubstituted azulene to naphthalene was the first reported thermal transformation of an aromatic hydrocarbon, and has consequently been the most widely studied rearrangement. (wikipedia.org)
However, the following mechanisms are generalized to all thermal isomerizations of aromatic hydrocarbons. (wikipedia.org)
Indications of thermal rearrangements of aromatic hydrocarbons were first noted in the early 20th century by natural products chemists who were working with sesquiterpenes. (wikipedia.org)

Global production of SOA from aromatic sources via the mechanisms identified here is estimated at 3.5 Tg/yr, resulting in a global burden of 0.08 Tg, twice as large as previous estimates. (harvard.edu)

10% of total nonmethane organic carbon emission are aromatic hydrocarbons from the exhaust of gasoline-powered vehicles. (wikipedia.org)

A detailed description of the interactions between dendrimers and aromatic hydrocarbons can assist researchers in selecting and tuning dendrimer properties for specific applications. (confex.com)
We used all-atom molecular dynamics (MD) simulations to investigate the interactions between dendrimers and hydrocarbons. (confex.com)
We performed extensive simulations of aromatic hydrocarbon-dendrimer interactions, totaling several microseconds of simulation time for 70,000+ atom systems. (confex.com)

Note that halogenating a hydrocarbon produces something that is not a hydrocarbon. (wikipedia.org)

Unsaturated hydrocarbons , which have one or more double or triple bonds between carbon atoms. (wikipedia.org)

For example, the solubility of naphthalene is increased by a factor of about ten if the temperature is increased from 20 to 75°C. This effect is essential to increase the bioavailability of sparingly soluble hydrocarbons. (iwaponline.com)

This work provides novel insight into the molecular partitioning of heterogeneous aromatic clusters, with particular relevance to the structure of nascent soot particles. (ntu.edu.sg)
Hydrocarbons with the same molecular formula but different structural formulae are called structural isomers . (wikipedia.org)

And if phytoplankton emit aromatic hydrocarbons, can they affect Earth's temperature? (vaughantoday.ca)

Anatomy7

Organisms11

Chemicals and Drugs150

Analytical, Diagnostic and Therapeutic Techniques and Equipment20

Psychiatry and Psychology1

Phenomena and Processes44

Disciplines and Occupations3

Technology, Industry, Agriculture7

Information Science4

Health Care27

Geographicals2

Pahs25

Benzene6

Benzo1

Compounds3

Polycyclic aromatic hydrocarbons1

Toluene1

Abstract1

Concentrations1

Exposure1

Aliphatic hydrocarbons2

Derivatives2

Polychlorinated Biphenyls1

Petroleum2

Hydrophobic1

Photolysis2

Determination1

Biodegradation4

PAH's2

Emissions3

Biomass1

ATSDR1

Organic Chemistry2

Species3

Toxicity4

Contamination1

Substances1

Chemical1

Dust1

Ratios1

Secondary1

Occurs1

Thermal5

Mechanisms1

Exhaust1

Interactions3

Produces1

Carbon1

Naphthalene1

Molecular2

Affect1