Tag: "pollutant" at biology news

One hour of grass cutting equals 100 miles worth of auto pollution

...orld's largest scientific society. One significant pollutant from mowers is polycyclic aromatic hydrocarbons, or PAHs, said Roger Westerholm, Ph.D., an assistant professor at Stockholm University in Stockholm, Sweden. He claims such emissions, similar for both riding and push mowers, can be cut more than 80 pe...

One change in farming makes for cleaner waterways

... An Ohio State University researcher compared pollutant emissions in 1985 to those 1...spond with changes in actual pollutant levels in the lake. Actual water testing revealed that in the Sandusky River,...

A spread of a different kind

...n of the pollutants, Jones said. Elevated regional pollutant concentrations could help investigators better det...worldwide patterns of estimated persistent organic pollutant emissions, according to Jones. Pollutants carried aloft by the wind eventually fall to Earth, often ...

Nature mops up

...ia metabolize (i.e. eat) the offending hydrocarbon pollutant (gas, oil, etc). Removal of the sediments that have microbiologically adapted to do this clean-up may actually increase the problem. If the dredging is done in estuaries with other industrial discharges occurring it doesn't take long for the system t...

Atmospheric chemistry key to global and local air pollution

...'s ultraviolet radiation. At ground level, it is a pollutant implicated in respiratory problems and eye irritat...xyl radicals form and combined with the industrial pollutant nitric oxide produces ozone. The sun then breaks down this ozone, creating hydroxl radicals and star...

In a hopeful sign, mercury levels decline in Everglades wading birds

...of Florida researcher has found that levels of the pollutant in wading birds have dropped significantly since 1994. Scientists and state officials charged with reducing mercury pollution aren't sure of the cause, but the declines may reflect the removal of mercury from commercial products and industrial pro...

Acid-rain component may be more potent pollutant than previously thought, UB chemists discover

...hemists have found that nitric oxide, a common air pollutant and one of the components of acid rain, is highly ...ntially making the chemical an even more insidious pollutant than has been thought. The UB team also found that the reactive site between a nitric oxide cation (...

Major air pollution study launched

.... The traditional approach to controlling this pollutant has been to limit emissions of hydrocarbons. Daum points out, however, that despite the fact that lower hydrocarbon emissions have improved air quality in many areas over the past 30 years, "there are still large areas of the country that are out of ...

Effects of ozone pollution threaten agricultural production on Long Island, NY, says Cornell plant pathologist

...two summers, high amounts of ground-level ozone a pollutant commonly called "smog" have seriously retarded th...on Center in Riverhead, N.Y. The effects of the pollutant on the clover appear to be a warning of a wider threat. "We need to pay attention to the amount ...

Mountains of variables: The effect of landscape features on atmospheric deposition

... great ecological importance, because nutrient and pollutant loads of such magnitude have been shown to affect ecosystem function. "Our study shows that it is critically important to take into account landscape features when estimating atmospheric inputs to mountainous areas," says Weathers. "By not taking th...

Acid-loving microbe may be a key to mine pollution

...found in metal ores to sulfuric acid, the chemical pollutant that contaminates mining sites and drains into nearby rivers, streams and groundwater. "We think this new archaeon might be one of the more important players in catalyzing these reactions," says Katrina J. Edwards, the lead author of the Science art...

Study: Methane cleans nitric oxide from power plant emissions

... their exhaust gases to convert the pollutant into nitrogen and water. A van... well methane would remove the pollutant from a gas containing other compounds. They used a combination similar to real-w...

Revised model of protein-drug interactions could make job of drug designers a little easier

...e body. Some bacteria can degrade one version of a pollutant but not its mirror image; a key receptor in the brain is turned on by an amino acid but not its mirror image. The reigning assumption is that the business end of a molecule homes in on the "active site" of a protein -- an enzyme, for example, or a r...

UF research suggests widely used models may under predict pollution

...tted by cars, Andino said. But they ignore another pollutant especially common in urban environments: tiny particles emitted in diesel engine exhaust, aerosol sprays or from a range of other sources. "Particles can come directly from sources such as diesel trucks or they can be formed in the atmosphere," Andi...

New study claims data on pollutants worldwide are unreliable, and that some may be less--or more--harmful than thought

...his asymmetry causesmolecules of the same chemical pollutant to exist as mirror images of oneanother. Since man...ants depends on how well the toxic portions of the pollutant fit togetherwith molecules of living things. "Our study emphasizes the fact that much of the...

Humus/Mineral interaction

...ndwater. However, in its strongly bound state, the pollutant is also less likelyto be broken down by microrganisms. The researchers detail their results in the just released current issueof the Soil Science Society of America Journal in a paper, "Quinoline Sorptionon Kaolinite-Humic Acid Complexes." ...

Atmospheric carbon monoxide levels decreasing in mid-Atlantic region

...ern Hemisphere research.Carbon monoxide is a trace pollutant in the troposphere, or lower atmosphere,and is released by the combustion of fossil fuels (such as gasoline) and bybiomass burning (such as forest fires). It is an important link controlling theoxidizing capacity of the atmosphere, through its chemic...

Research zeroes in on killer molecule in dioxin toxicity

...by dioxins. Dioxin is a highly toxic environmental pollutant formed as a byproduct duringthe manufacture and bleaching of paper. It is one of the most biologicallypotent chemicals, a member of the family of compounds known as halogenatedaromatic hydrocarbons (which includes PCBs) that are found in herbicides,...

Smog impacts: Hurtling through airways, tiny particles may do more damage than previously assumed

...hanical engineering at UD, "perhaps partly because pollutant particles are sodeeply deposited in our airways." ... the next Journal of Aerosol Science, reveals how pollutant particles smaller than2.5 micrometers--a size identified by the U.S. Environmental Protection Agency...

Particulate matter causing air pollution

...tions. "It's possible that controlling one pollutant without controlling theother might make one worse," Chameides said. "The trick is to fully understandhow they interact so you can come up with a strategy to deal with both of them." Chameides is spearheading the SuperSite study under the ausp...

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