Sentences with phrase «polycyclic aromatic hydrocarbons»

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

The future of proposed studies on nanoparticles and oil sands contaminants such as polycyclic aromatic hydrocarbons (PAHs) may now be dead.

We look at our galaxy and other galaxies and we see that they are glowing with molecules called polycyclic aromatic hydrocarbons.

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.

Analyses of the sunlight reflected off the asteroid also show that organic compounds are widespread on the surface, he added, including polycyclic aromatic hydrocarbons, CH2 and CH3.

Bitumen is comprised primarily of polycyclic aromatic hydrocarbons which can be highly carcinogenic (the EPA has classified seven PAH compounds as probable human carcinogens) and requires extensive processing to make it thin enough to flow through pipes.

Lotions on the inside of the diaper lining also have the potential to contain polycyclic aromatic hydrocarbons, which have also been identified as cancer - causing chemicals.

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

Simple aromatic molecules such as benzonitrile may be precursors for polycyclic aromatic hydrocarbon formation, providing a chemical link to the carriers of the unidentified infrared bands.

These lotions often include petrolatum, essentially the same substance as Vaseline, which has the potential to be contaminated with polycyclic aromatic hydrocarbons (PAHs), cancer - causing chemicals found in crude oil, according to the U.S. Environmental Working Group, an organization that devotes itself to educating consumers about health hazards posed by a variety of products.

«We found that snow absorbs certain polycyclic aromatic hydrocarbons which are organic pollutants known to be toxic and carcinogenic,» says Yevgen Nazarenko, a postdoctoral researcher working with Parisa A. Ariya, professor at McGill's Department of Atmospheric and Oceanic Sciences and Department of Chemistry, and collaborating with Prof. Patrice Seers» team at École de technologie supérieure.

Or it could have been big, complex organic molecules like polycyclic aromatic hydrocarbons synthesized between the stars, incorporated into the primordial stuff of comets and asteroids, and still raining onto the surface of every body in the solar system.

Previous work has indicated a strong correlation between the amount of material identified by magnetic remanence and benzo (a) pyrene, a carcinogenic polycyclic aromatic hydrocarbon found in particulates, Maher says.

«Global Long - Range Transport and Lung - Cancer Risk from Polycyclic Aromatic Hydrocarbons Shielded by Coatings of Organic Aerosol.»

«Though we haven't yet observed polycyclic aromatic hydrocarbons directly, we understand their chemistry quite well.

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

The Vincent Center for Reproductive Biology, which Tilly directs Fact sheet on polycyclic aromatic hydrocarbons Centers for Disease Control and Prevention tobacco information site

Polycyclic aromatic hydrocarbons result from many forms of combustion, including diesel engines, automotive exhaust, coal burning, grilling of meat and cigarette smoking.

The goal of the Uppsala University team is to create bacteria capable of detecting and degrading polycyclic aromatic hydrocarbons (PAH's).

Astronomers using the Green Bank Telescope have made the first definitive interstellar detection of benzonitrile, an intriguing organic molecule that helps to chemically link simple carbon - based molecules and truly massive ones known as polycyclic aromatic hydrocarbons.

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.

Stormwater is effectively a toxic mixture that can include polycyclic aromatic hydrocarbons, many of which are carcinogenic, metals, suspended particles, and other organic compounds, most of which have yet to be identified.

The fumes have been found to contain polycyclic aromatic hydrocarbons (PAHs), heterocyclic amines, higher and mutated aldehydes, and fine and ultrafine particles.

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.

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.

But the government says it is crucial to protect people from dangers of eating shellfish contaminated with polycyclic aromatic hydrocarbons, elements of oil that are carcinogenic.

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

Based on laboratory experiments, PNNL chemist Alla Zelenyuk has found that manmade pollutants, like polycyclic aromatic hydrocarbons, also known as PAHs, can dramatically increase the number and mass of particles produced by plant - based alpha - pinene - the chemical that gives pine trees their scent.

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.

• Polycyclic aromatic hydrocarbons found in tobacco smoke.

When beef is overcooked it produces heterocyclic amines and polycyclic aromatic hydrocarbons which are highly carcinogenic.

The researchers were looking for polycyclic aromatic hydrocarbons (PAHs), which are in roofing tar.

Polycyclic aromatic hydrocarbons (PAHs) are compounds released from the incomplete burning of wood, charcoal, fossil fuels or any other organic substance.

Diluted bitumen is more likely to cause corrosion in the pipeline as well as in the tankers, is heavier than water and therefore harder to clean up, and can threaten human health as it contains toxins such as benzene, polycyclic aromatic hydrocarbons, and n - hexane, which can affect the human central nervous system.

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.»

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 features.

The evaporation process can also concentrate the toxic compounds left behind, particularly oil - derived compounds called polycyclic aromatic hydrocarbons, or PAHs.

Polycyclic aromatic hydrocarbons and polycyclic aromatic nitrogen heterocycles are thought to be widespread throughout the universe, because these classes of molecules are probably responsible for the unidentified infrared bands, a set of emission features seen in numerous Galactic and extragalactic sources.

Lab fish that are exposed to the residues of incomplete combustion, so - called polycyclic aromatic hydrocarbons (PAHs), have a higher risk of developing cancer and DNA damage.

Polycyclic aromatic hydrocarbons (PAHs) present in tobacco smoke are one of the main culprits behind lung cancer.

Other studies found that firefighters and other rescue workers had elevated levels of chemical toxicants in their blood and urine; for example, 321 firefighters tested at the end of September 2001 had elevated levels of the polycyclic aromatic hydrocarbons that result from jet fuel burning and are human carcinogens.

Then he assembled timelines of two other substances in the cores: polycyclic aromatic hydrocarbons, which are released when plant matter is burned, and plant waxes, which allow paleoclimatologists to deduce whether nearby land was forested or cleared, presumably for farming.

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.

Dr Hauptmann said: «The microbial potential to degrade anthropogenic contaminants, including polychlorinated biphenyls (PCB), polycyclic aromatic hydrocarbons (PAHs), and the heavy metals mercury and lead, was found to be widespread, and not limited to regions close to human activities.»

We now know that bitumen can be a source of polycyclic aromatic hydrocarbons (PAHs)-- pollutants that have been linked to a number of health problems (see «Poisonous ingredients»).