Sentences with phrase «aromatic hydrocarbons in»

Properties of polycyclic aromatic hydrocarbons in local elliptical galaxies revealed by the Infrared Spectrograph on Spitzer

Her favorite chemicals — favorite in the sense that she has studied them more than any others — are the polycyclic aromatic hydrocarbons in cigarette smoke, power - plant emissions, automobile exhaust, and other sources of combustion.

The zeolite catalyst then converts these hydrogenated products into light olefins and aromatic hydrocarbons in a yield as much as three times higher than that produced with the pure pyrolysis oil.

Not exact matches

Beer marinades are actually an effective way of reducing levels of polycyclic aromatic hydrocarbons (PAHs), a group of carcinogenic compounds that form on grilled meat when fats and juices interact with an open flame, finds a new study in the Journal of Agricultural and Food Chemistry.

In fact, the E.P.A. says the lake that Martens bobbed around in for about ten minutes while wearing a life jacket contains the following substances: «mercury, polychlorinated biphenyls (PCBs); pesticides; creosotes; heavy metals including lead, cobalt, and mercury; polycyclic aromatic hydrocarbons (PAHs); and volatile organic compounds (VOCs) such as chlorobenzene.&raquIn fact, the E.P.A. says the lake that Martens bobbed around in for about ten minutes while wearing a life jacket contains the following substances: «mercury, polychlorinated biphenyls (PCBs); pesticides; creosotes; heavy metals including lead, cobalt, and mercury; polycyclic aromatic hydrocarbons (PAHs); and volatile organic compounds (VOCs) such as chlorobenzene.&raquin for about ten minutes while wearing a life jacket contains the following substances: «mercury, polychlorinated biphenyls (PCBs); pesticides; creosotes; heavy metals including lead, cobalt, and mercury; polycyclic aromatic hydrocarbons (PAHs); and volatile organic compounds (VOCs) such as chlorobenzene.»

The EPA proposed in April that this portion of the creek, downstream from an industrial park, be added as the sediment is contaminated with mercury and polycyclic aromatic hydrocarbons, or PAHs.

Aromatic molecules such as polycyclic aromatic hydrocarbons (PAHs) are known to exist in the interstellar medium owing to their characteristic infrared emission fAromatic molecules such as polycyclic aromatic hydrocarbons (PAHs) are known to exist in the interstellar medium owing to their characteristic infrared emission faromatic hydrocarbons (PAHs) are known to exist in the interstellar medium owing to their characteristic infrared emission features.

But if those aromatic hydrocarbons were treated with an acid to create aniline or another amine, after some additional steps the newly synthesized molecules very efficiently absorbed light particles from specific wavelengths in the visible spectrum.

In the near - term, the jet biofuel is likely to be blended with the petroleum - based variety, because the biofuels lack aromatics — hydrocarbon rings — that interact with the seals in current engines, helping swell them shuIn the near - term, the jet biofuel is likely to be blended with the petroleum - based variety, because the biofuels lack aromatics — hydrocarbon rings — that interact with the seals in current engines, helping swell them shuin current engines, helping swell them shut.

There are over 100 polycyclic aromatic hydrocarbons (PAHs) found in oil, coal and tar, which are readily released into the environment when fossil fuels are burned.

Among the greatest concerns is that compounds in oil called polycyclic aromatic hydrocarbons (PAHs) could have long - term sublethal effects on marine organisms that were at the peak of their spawning season when the spill began.

Until the end of September, the petrol stations will be replacing their superunleaded petrol with «summer petrol» in which a tenth of the aromatic hydrocarbons are replaced by fuel oxygenates such as methyl tertiary butyl ether, or MTBE.

In a new study published in the journal PLOS One, Jennifer Horney, PhD, associate professor and head of the Department of Epidemiology and Biostatistics in the Texas A&M School of Public Health, along with researchers from Texas A&M and the Pacific Northwest National Lab, examined concentrations of polycyclic aromatic hydrocarbons (PAHs) before and after Hurricane Harvey in the Houston environmental justice neighborhood of ManchesteIn a new study published in the journal PLOS One, Jennifer Horney, PhD, associate professor and head of the Department of Epidemiology and Biostatistics in the Texas A&M School of Public Health, along with researchers from Texas A&M and the Pacific Northwest National Lab, examined concentrations of polycyclic aromatic hydrocarbons (PAHs) before and after Hurricane Harvey in the Houston environmental justice neighborhood of Manchestein the journal PLOS One, Jennifer Horney, PhD, associate professor and head of the Department of Epidemiology and Biostatistics in the Texas A&M School of Public Health, along with researchers from Texas A&M and the Pacific Northwest National Lab, examined concentrations of polycyclic aromatic hydrocarbons (PAHs) before and after Hurricane Harvey in the Houston environmental justice neighborhood of Manchestein the Texas A&M School of Public Health, along with researchers from Texas A&M and the Pacific Northwest National Lab, examined concentrations of polycyclic aromatic hydrocarbons (PAHs) before and after Hurricane Harvey in the Houston environmental justice neighborhood of Manchestein the Houston environmental justice neighborhood of Manchester.

The effects of demoralization were greatest among children with higher levels of prenatal exposure to polycyclic aromatic hydrocarbons (PAH) in air pollution.

NASA researchers triggered international headlines in 1996 when they discovered, among other possible indicators of life, traces of polycyclic aromatic hydrocarbons (multiringed carbon molecules found in living cells) along surface fractures in ALH84001.

The parent compounds involved in this research are polycyclic aromatic hydrocarbons, or PAHs, formed naturally as the result of almost any type of combustion, from a wood stove to an automobile engine, cigarette or a coal - fired power plant.

They are looking for oil and the presence of polycyclic aromatic hydrocarbons, the most worrisome of toxins in oil.

It's part of a new initiative to develop faster ways of detecting polycyclic aromatic hydrocarbons (PAHs) in shrimp, mussels, and oysters.

According to the U.S. Department of Health and Human Services, certain polycyclic aromatic hydrocarbons «may reasonably be expected» to cause cancer in people.

The bacterial cleanup probably did not eliminate polycyclic aromatic hydrocarbons, known carcinogens that are among the most toxic and potentially dangerous ingredients in oil.

Also present in the animals» blood and bile were signs of exposure to carcinogenic polycyclic aromatic hydrocarbons (PAHs)-- a family of more than 100 substances generated by the partial burning of oil, gas and other materials.

«In the bodies of organisms such as mammals or birds, these aromatic hydrocarbons can be transformed into even more toxic products, which can affect DNA.»

The toxic compounds in oil vary, but the most worrisome are polycyclic aromatic hydrocarbons (PAHs), such as napthalenes, benzene, toluene and xylenes.

In babies born pre-closure, researchers found higher levels of PAH - DNA cord adducts, a biomarker for exposure to polycyclic aromatic hydrocarbons, a toxic component of air pollution from coal plants.

They called in the Department of Environmental Management (DEM), and they learned it was very heavily contaminated with arsenic, with a lot of polycyclic aromatic hydrocarbons (PAHs), and with other things contained in waste from a manufactured gas plant.

Earlier work had shown that chemicals called polycyclic aromatic hydrocarbons (PAH), which are found in cigarette smoke, can kill mouse eggs, so the team set out to find out how PAHs do their damage.

Polycyclic aromatic hydrocarbons (PAHs) are a class of carcinogenic organic compounds that are ubiquitous in the environment.

The researchers also found much higher levels of polycyclic aromatic hydrocarbons, which are known mutagens, in particles at the polluted site, making these chemicals a leading suspect.Similar mutations have been reported in people exposed to radiation.

As crude oil burns it releases many toxic chemicals, including lead, carbon monoxide, polycyclic aromatic hydrocarbons and volatile organic compounds, says Bin Jalaludin at the University of New South Wales in Australia.

However, the types of organic compounds found in plant matter — dominated by aromatic hydrocarbons — underwent some chemical changes, but remained relatively resistant to impact pressures.

New results from Aarhus University indicate that such mobile microorganisms can play a surprising key role in bioremediation of soil which is contaminated with so - called PAHs (Polycyclic Aromatic Hydrocarbons).

Pyrene belongs to a family known as polycyclic aromatic hydrocarbons, or PAHs, that are estimated to account for about 20 percent of all carbon in our galaxy.

The latest study, which featured experiments at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab), could help explain the presence of pyrene, which is a chemical compound known as a polycyclic aromatic hydrocarbon, and similar compounds in some meteorites.

Some of those large molecules are like small sheets of graphite with hydrogen attached to them: we call these polycyclic aromatic hydrocarbons and they can be found in terrestrial counterparts like mothballs, for example.

By giving a single small dose of certain chemicals (aromatic polycyclic hydrocarbons) to selected strains of female rats he found he could produce, within a few weeks, malignant mammary tumors — many of which were hormone dependent — in 100 percent of the treated animals.

However, the types of organic compounds found in plant matter — dominated by aromatic hydrocarbons - underwent some chemical changes, but remained relatively resistant to impact pressures.

Astrochemists have known that polycyclic aromatic hydrocarbons (PAHs) make up an estimated 10 % of all interstellar carbon in the universe, but it has been challenging for them to distinguish one PAH from another.

AKARI near - infrared spectroscopy of the aromatic and aliphatic hydrocarbon emission features in the galactic superwind of M 82

We have significantly detected polycyclic aromatic hydrocarbon (PAH) features from 14 out of the 18 galaxies, and thus found that the presence of PAHs is not rare but rather common in dusty elliptical galaxies.

She also leads the Biostatistics and Modeling Core for the Oregon State University Superfund Research Program, which brings together a multidisciplinary team experienced in polycyclic aromatic hydrocarbons and environmental health issues.

We compared the [CII] intensity map with... ▽ More We investigate the large - scale structure of the interstellar medium (ISM) around the massive star cluster RCW38 in the [CII] 158 um line and polycyclic aromatic hydrocarbon (PAH) emission.

Abstract: We investigate the large - scale structure of the interstellar medium (ISM) around the massive star cluster RCW38 in the [CII] 158 um line and polycyclic aromatic hydrocarbon (PAH) emission.

Certain particle compounds may directly generate ROS in vivo because of their surface chemistry (eg, metals, organic compounds, and semiquinones) or after bioactivation by cytochrome P450 systems (eg, polycyclic aromatic hydrocarbon conversion to quinones).6, 290 a, 290 b A particle surface or anions present on otherwise more inert particles may disrupt iron homeostasis in the lung and thereby also generate ROS via Fenton reactions.291 Other PM constituents may do so indirectly by the upregulation of endogenous cellular sources (eg, nicotinamide adenine dinucleotide phosphate [NADPH]-RRB- oxidase) 292,293 or by perturbing organelle function (eg, mitochondria) by taken - up PM components.261 Particle stimulation of irritant and afferent ANS fibers may also play a role in local and systemic oxidative stress formation.294 Given the rich antioxidant defenses in the lung fluid, secondarily generated oxidization products of endogenous molecules (eg, oxidized phospholipids, proteins) or a reduction in endogenous antioxidants per se may be responsible at least in part for the state of oxidative stress in the lungs (along with instigating the subsequent cellular responses) rather than ROS derived directly from PM and its constituents.

Carbon black and polycyclic aromatic hydrocarbons, a sootlike product and a known pollutant, are often the main ingredients in black ink.

Studies show that the polycyclic aromatic hydrocarbons have been found stored in the lymph nodes of tattooed people causing them to actually turn black.

For starters, the Prestige spill — which was roughly one - tenth the size of the Deepwater Horizon spill — involved bunker oil, which contains different proportions of carcinogenic compounds (notably polycyclic aromatic hydrocarbons and benzene) than the crude oil spilled in the Gulf, according to Dr. Solomon.

The research says that concern over cancer causing compounds such as heterocyclic amines (HCAs), and polycyclic aromatic hydrocarbons), would be better directed toward educating consumers on the charring and blackening that occurs when grilling or barbecuing muscle meats, rather than cooking the meat in microwave ovens.

• Polycyclic aromatic hydrocarbons found in tobacco smoke.

Charcoal grilled meats and smoked foods contain chemicals called polycyclic aromatic hydrocarbons that are used to induce cancer in laboratory animals, yet our ancestors ate liberally of smoked meats and fish without suffering from high levels of cancer.

More recently, the journal Cancer Epidemiology Biomarkers & Prevention published research from 2008 which found very high levels of carcinogenic polycyclic aromatic hydrocarbons (PAHs) in processed dry yerba mate leaves and in both hot and cold infusions of mate.