Sentences with phrase «polynuclear aromatic hydrocarbons»

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

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.

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.

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.

These particles are believed to be most dangerous due to their carcinogenic trace compounds such as polycyclic aromatic hydrocarbons.

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.

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.

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.

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»).

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.

The yield of aromatic hydrocarbons and light olefins from the biomass conversion over zeolite is proportional to the intrinsic amount of hydrogen added to the biomass feedstock during hydroprocessing.

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 then the only alternatives were organic solvents such as aromatic hydrocarbons or benzene derivatives which could leave toxic residues.

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.

The research builds on earlier work by the Auke Bay Laboratories, part of NOAA Fisheries» Alaska Fisheries Science Center, which found much reduced survival of pink salmon exposed as embryos to polycyclic aromatic hydrocarbons (PAH) from crude oil.

There has long been concern about the health effects of the polycyclic aromatic hydrocarbons (PAHs) from vehicle exhausts and power plants.

However, burning also produces another type of chemical called polynuclear aromatic hydrocarbons (PAHs).

Their particular focus was a class of molecules, called aromatic hydrocarbons, that are distinguished by their stability and restrained reactivity.

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 Manchester.

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.

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

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

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.

Not only did the gene sequencing show several bacteria could break down aromatic hydrocarbons, it illuminated how various species worked together to maximize the genetic potential of the whole microbial community.

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.

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.

About 10 percent of mercury emissions come from open burning, as well as 40 percent of polycyclic aromatic hydrocarbons (PAHs).

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.

The Canadian fire released large quantities of dioxins and aromatic hydrocarbons into the atmosphere, and oil into groundwater.

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.

Perera's team analyzes housing conditions and psychosocial stressors as well as polycyclic aromatic hydrocarbons, cigarette smoke, insecticides, toxic metals, and indoor allergens.

«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.

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

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, or PAHs, from motorbikes and other vehicles are caused by incomplete combustion.

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.