nitrogen oxides


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nitrogen oxides

[¦nī·trə·jən ′äk‚sīdz]
(inorganic chemistry)
NO x Chemical compounds of nitrogen and oxygen; produced primarily from the combustion of fossil fuels, they contribute to the formation of ground-level ozone.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
It said priority will be given to regulating entities that emit more than 40 metric tons of nitrogen oxide, including those in the power, cement, steel and waste incineration industries.
During summertime, some sulfur dioxide and nitrogen oxide emissions remain in a gas phase and subsequently are either broken down by sunlight or deposited on land, with the rest becoming nitrates and sulfates.
Studies found there was a high correlation between idling and increases in Nitrogen Oxides. In response the station has now introduced a 12-minute dwell time policy for trains and new supervisors to enforce it.
Moreover, high levels of nitrogen oxide affect children's long-term lung growth, and are even suspected of affecting the development of the baby in the mother's womb.
According to the researchers, it is very difficult to oxidize carbon monoxide and nitrogen oxides. Air purification by using photocatalysts produced in this research can be a good replacement for other air purification methods due to its reasonable price, high efficiency, non-toxicity and production of harmless bi-products due to the oxidization of polluting gases.
"This one power station pumps out 32,000 tonnes of toxic nitrogen oxides into the atmosphere every year, costing society hundreds of millions of pounds in damage to people's health.
VW scandal shows Greens misguided FOR years the wind industry and the Greens have had the misguided obsession of telling us all to lower harmless carbon dioxide, yet totally ignoring the higher emissions of harmful and the very real health threatening nitrogen oxide gases.
cities between 2000 and 2002, found that households in majority-white neighborhoods had the lowest air pollution levels, with 5 percent lower particulate matter and 18 percent lower nitrogen oxide levels than in neighborhoods with less than 25 percent white households.
By 2018, EPA estimates the cleaner fuels and cars program will cut ambient concentrations of ozone and reduce nitrogen oxide emissions by about 260,000 tons.
To track the cycle of nitrogen in the atmosphere, they studied dinitrogen pentoxide, a molecule that results from the oxidation of nitrogen oxides. It can react with chloride from sea salt, for example, to form nitryl chloride.
Lan Jun, deputy head of the Yunnan Environmental Protection Department, said Anning has three air monitoring stations, one each for sulfur dioxide, nitrogen oxides, and particulates less than 10 micrometers in diameter.
His study found that isoprene, once it is altered chemically via exposure to the sun, reacts with man-made nitrogen oxides to create particulate matter.