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Topic: Nitrogen oxide

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	ATSDR - MMG: Nitrogen Oxides (Site not responding. Last check: 2007-11-02)
		Nitrogen oxides are irritating to the eyes, skin, mucous membranes, and respiratory tract.
		Nitrogen dioxide is a corrosive substance that forms nitric and nitrous acids upon contact with water; it is more acutely toxic than nitric oxide, except at lethal concentrations when nitric oxide may kill more rapidly.Nitric oxide is a potent and rapid inducer of methemoglobinemia.
		The diagnosis of acute nitrogen oxide toxicity is primarily based on respiratory symptoms and establishing a history of exposure to nitrogen oxides.
	www.atsdr.cdc.gov /MHMI/mmg175.html (5072 words)

	ScienceDaily: Nitrogen oxide (Site not responding. Last check: 2007-11-02)
		NOx is a generic term for the various nitrogen oxides produced during combustion.
		UC Berkeley Chemists Identify Missing Nitrogen Oxide Pollutant In Atmosphere (March 26, 2002) -- Along the route from tailpipe through atmosphere, nitrogen oxides - collectively known as NOx compounds - react with hydrocarbons to form a variety of nitrogen-containing pollutants, including nitric...
		Nitrogen oxide -- NOx is a generic term for the various nitrogen oxides produced during combustion.
	www.sciencedaily.com /encyclopedia/Nitrogen_oxide (1405 words)

	Nitrogen oxide - Wikipedia, the free encyclopedia
		A mixture is often formed in chemical reactions that produce nitrogen oxides, with the proportions depending on the specific reaction and the conditions it is performed in.
		In this context nitrous oxide and ammonia are not considered as reactive nitrogen compounds.
		During the release and prior to the oxidation of the volatiles, nitrogen reacts to form several intermediaries which are then oxidized into NO. The second path involves the release of nitrogen radicals during the combustion of the char portion of the fuels.
	en.wikipedia.org /wiki/Nitrogen_oxide (1068 words)

	Nitrogen cycle - Wikipedia, the free encyclopedia
		The nitrogen cycle is the biogeochemical cycle that describes the transformations of nitrogen and nitrogen-containing compounds in nature.
		Nitrogen is essential for many biological processes; it is in all amino acids, is incorporated into proteins, and is present in the bases that make up nucleic acids, such as DNA and RNA.
		Nitrates are the form of nitrogen most commonly assimilated by plant species, which, in turn are consumed by heterotrophs for use in compounds such as amino and nucleic acids.
	en.wikipedia.org /wiki/Nitrogen_cycle (1587 words)

	ATSDR - ToxFAQs™: Nitrogen Oxides (Site not responding. Last check: 2007-11-02)
		Nitrogen oxides are a mixture of gases that are composed of nitrogen and oxygen.
		Nitrogen oxides are also used in rocket fuels, nitration of organic chemicals, and the manufacture of explosives.
		Nitrogen oxides are broken down rapidly in the atmosphere by reacting with other substances commonly found in the air.
	www.atsdr.cdc.gov /tfacts175.html (1109 words)

	EO News: Sensitive Detector Identifies Missing Nitrogen Oxide Pollutant in Atmosphere - March 22, 2002
		"Nitrogen oxide radicals are the major species controlling production of photochemical smog and subsequent chemical reactions in the atmosphere," said Ronald C. Cohen, professor of chemistry and leader of the UC Berkeley research team.
		Nitrogen oxides from auto and smokestack emissions, among other sources, react readily with hydrocarbons to form compounds that eventually lead to ozone.
		On the way from NOx and hydrocarbons to ozone, the nitrogen oxide is converted to various forms, including nitric acid, which falls out in rain, and peroxy(acyl)nitrates, which travel widely around the globe because they do not dissolve in rainwater.
	earthobservatory.nasa.gov /Newsroom/MediaAlerts/2002/200203228332.html (994 words)

	Nitrogen Oxides \| Mobile Source Emissions \| US EPA
		Nitrogen oxides form when fuel burns at high temperatures, such as in motor vehicle engines.
		Nitrogen oxides can travel long distances, causing a variety of health and environmental problems in locations far from their emissions source.
		Nitrogen oxide emissions also contribute to the formation of particulate matter through chemical reactions in the atmosphere.
	www.epa.gov /otaq/invntory/overview/pollutants/nox.htm (197 words)

	NOx emissions and biodiesel: Journey to Forever
		Nitrogen oxide emissions with biodiesel, taken from various scientific and industry studies.
		"As the concentration of biodiesel increased, the oxides of nitrogen [NOx] emissions increased.
		"Nitrogen Oxides (NOx) emissions from biodiesel increase or decrease depending on the engine family and testing procedures.
	www.journeytoforever.org /biodiesel_nox.html (598 words)

	Glossary: Nitrogen oxides (NOx), nitric oxide (NO), nitrogen dioxide (NO2)
		Many of the nitrogen oxides are colorless and odorless.
		However, one common pollutant, nitrogen dioxide (NO2) along with particles in the air can often be seen as a reddish-brown layer over many urban areas.
		In the atmosphere, nitrogen oxides can contribute to formation of photochemical ozone (smog) and have health consequences.
	www.greenfacts.org /glossary/mno/nitrogen-oxides-NOx-nitric-oxide-NO-nitrogen-dioxide-NO2.htm (219 words)

	Nitrogen Oxides
		Nitrogen oxides (also known as oxides if nitrogen, and abbreviated as NOx) is a collective term used to refer to two species of oxides of nitrogen: nitric oxide (NO) and nitrogen dioxide (NO Nitric oxide is a colorless, flammable gas with a slight odour.
		Nitrogen dioxide is a reddish brown, nonflammable, gas with a detectable smell.
		Nitrogen dioxide is a strong oxidizing agent that reacts in the air to form corrosive nitric acid, as well as toxic organic nitrates.
	www.ace.mmu.ac.uk /eae/Acid_Rain/Older/Nitrogen_Oxides.html (211 words)

	NITROGEN OXIDES (NOx)
		Nitrogen dioxide is a reddish-brown gas with a pungent, irritating odour.
		As one of the components of smog, nitrogen dioxide is known to irritate the lungs and increase susceptibility to respiratory infections.
		Nitrogen oxides are an important component in acid deposition, as discussed in the fact sheet Acid Deposition (Acid Rain).
	dwb.unl.edu /Teacher/NSF/C09/C09Links/www.casahome.org/nitrogen.htm (880 words)

	Nitric oxide and Nitrogen dioxide
		These nitrogen oxides contribute to the problem of air pollution, playing roles in the formation of both smog and acid rain.
		Photodissociation of nitrogen dioxide by sunlight produces nitric oxide and ozone in the troposphere, which is another component of smog.
		Nitrogen dioxide in the air also reacts with water vapor to form nitric acid, one of the types of acid in acid rain.
	www.windows.ucar.edu /physical_science/chemistry/nitrogen_oxides.html (902 words)

	INI : Purpose
		Nitrogen is one of the five major chemical elements that are necessary for life.
		Reactive nitrogen is implicated in the high concentration of ozone in the lower atmosphere, the eutrophication of coastal ecosystems, the acidification of forests, soils, and freshwater streams and lakes, and losses of biodiversity.
		In the form of nitrous oxide, a greenhouse gas, nitrogen contributes to global warming and stratospheric ozone depletion.
	www.initrogen.org /7.0.html (376 words)

	Nitrogen Oxide-1997 (Site not responding. Last check: 2007-11-02)
		This map depicts nitrogen oxide emissions by county in 1997.
		Nitrogen oxides play a major role in the formation of ozone in the atmosphere.
		A variety of nitrogen oxide compounds occur both naturally and as a result of human activities.
	www.unl.edu /nac/conservation/atlas/Map_Html/Air_Quality/National/Nitrogen_Oxide/Nitrogen_Oxide.htm (182 words)

	BEAM Nitrogen Dioxide Fact Sheet, Maine Department of Environmental Protection
		Nitrogen oxides and sulfur dioxide react with other substances in the air to form acid rain, which is associated with the acidification of soils, lakes, and streams, accelerated corrosion of buildings and monuments, and reduced visibility.
		Nitrogen dioxide also is a major source of fine particulate pollution, which is a significant health concern as well as a pollutant that impairs visibility.
		Nitrogen oxides are some of the main ingredients in the formation of ground-level ozone.
	www.state.me.us /dep/air/beam/factsheets/nitrogendioxide_fs.htm (542 words)

	Nitrogen and its Compounds
		Nitrogen comprises about 78.1% of the earth's atmosphere, and it is the source of the commercial and industrial gas.
		The main use of nitrogen is in the Haber process to prepare ammonia.
		The nitrogen atom is at the apex of a regular pyramid, the sides of which are the N-H bonds.
	www.physchem.co.za /Inorganic/Nitrogen.htm (782 words)

	WDNR - Nitrogen oxides sources and health effects
		Nitrogen dioxide exposure lowers the resistance of animals to such diseases as pneumonia and influenza.
		The human health effects of exposure to nitrogen oxides, such as nitrogen dioxide, are similar to those of ozone.
		Oxides of nitrogen, in the presence of sunlight, can also react with hydrocarbons, forming photochemical oxidants, as discussed in the section on ozone.
	www.dnr.state.wi.us /org/aw/air/health/oxides.htm (311 words)

	03.22.2002 - Sensitive detector identifies missing nitrogen oxide pollutant in atmosphere, UC Berkeley chemists report
		"Nitrogen oxide radicals are the major species controlling production of photochemical smog and subsequent chemical reactions in the atmosphere," said Ronald C. Cohen, professor of chemistry and leader of the UC Berkeley research team.
		Nitrogen oxides from auto and smokestack emissions, among other sources, react readily with hydrocarbons to form compounds that eventually lead to ozone.
		On the way from NOx and hydrocarbons to ozone, the nitrogen oxide is converted to various forms, including nitric acid, which falls out in rain, and peroxy(acyl)nitrates, which travel widely around the globe because they do not dissolve in rainwater.
	www.berkeley.edu /news/media/releases/2002/03/22_nitro.html (1036 words)

	nitrogen oxide
		Nitrogen monoxide and nitrogen dioxide contribute to air pollution.
		NO, or nitric oxide, is a colourless gas released when metallic copper reacts with concentrated nitric acid.
		Nitrogen monoxide was discovered during the 1980s to act as a chemical messenger in small quantities within the human body, despite being toxic at higher concentrations and its rapid reaction with oxygen.
	www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0026553.html (353 words)

	Nitrogen Dioxide, Bureau of Air Quality, Department of Environmental Protection
		In its pure state, nitrogen dioxide is a reddish-orange brown gas with a characteristic pungent odor.
		Nitrogen dioxide comprises about 10% of the oxides of nitrogen (NOx) that are formed when nitrogen in the air combines with oxygen during high temperature combustion.
		Oxides of nitrogen can cause serious injury to vegetation, including bleaching or death of plant tissue, loss of leaves, and reduced growth rate.
	www.maine.gov /dep/air/monitoring/nitrogenoxide.htm (289 words)

	History of ChEn: Nitrogen
		Because of this bond, nitrogen gas simply does not participate in any reactions at room temperature (or even at the higher temperatures found in small fires), and is therefore described as inert.
		Nitrogen Oxide (NO) A colorless bi-product formed in internal combustion engines where high temperatures and pressures are capable of combining the nitrogen and oxygen gases found in the air.
		Nitrogen Dioxide (NO) Otherwise known as smog, this brown gas comes about as nitrogen oxide is spontaneously oxidized in the atmosphere.
	www.pafko.com /history/h_s_n2.html (1055 words)

	The Chemistry of Nitrogen and Phosphorous
		The chemistry of nitrogen is dominated by the ease with which nitrogen atoms form double and triple bonds.
		Lewis structures for seven oxides of nitrogen with oxidation numbers ranging from +1 to +5 are given in the table below.
		The ratio of the radii of phosphorus and nitrogen atoms is the same as the ratio of the radii of sulfur and oxygen atoms, within experimental error.
	chemed.chem.purdue.edu /genchem/topicreview/bp/ch10/group5.php (3277 words)

	Regional Impacts of Woodland Expansion on Reactive Nitrogen Oxide Emissions from Texas Savannas (Site not responding. Last check: 2007-11-02)
		Efforts to quantify regional scale estimates of nitrogen oxide emissions from savanna systems have been impeded by the ability to determine the extent of woody cover, variation in soil type and the range of nitrogen oxide emission values associated with these parameters.
		O emissions and a biogeochemical model to examine regional impacts of woodland encroachment on nitrogen oxide emissions from the savanna soils of the northern Texas.
		Nitrogen oxide emissions were measured across a gradient of biomass and soil type on the 250,000 ha Waggoner Ranch, located south of Vernon Texas.
	asnerlab.stanford.edu /projects/texas_trace_gases/texas_trace_gases.htm (1169 words)

	eMedicine - CBRNE - Lung-Damaging Agents, Toxic Smokes: Nox, Hc, Rp, Fs, Fm, Sgf2, Teflon : Article by Daniel T Smith, ... (Site not responding. Last check: 2007-11-02)
		Nitrogen dioxide exists as a mixture of nitrogen dioxide, a reddish brown gas, and nitrogen tetroxide, a colorless gas.
		Other forms of nitrogen oxide include nitrous oxide, which is a common anesthetic or (when given without oxygen) asphyxiant, and nitric oxide, which quickly decomposes to nitrogen dioxide in the presence of moisture.
		Oxides of nitrogen: Because of their insolubility in water, NOx tend not to cause immediate upper airway irritation.
	www.emedicine.com /emerg/topic908.htm (6495 words)

	Nitrous Oxide Plants and Machinery - Sanghi Organization
		Nitrous Oxide is produced by heating Ammonium Nitrate to a temperature of 250 Deg.c.
		The steam and impurities are removed by scrubbing with water, caustic soda and sulphuric acid in sequence Nitrogen present in traces is removed by bleeding from the top of storage vessels where Nitrous Oxide is stored, after compression by a compressor.
		Nitrous Oxide is a chemical compound of Nitogen and Oxygen.
	www.sanghioverseas.com /nitrous_oxide_gas_plants/nitrous_oxide_gas_plants.htm (400 words)

	Nitrogen Oxide Technology Gives American Superconductor An Economical, Environmentally Friendly Treatment Solution
		Bionomic Industries’ solution uses a unique catalyst oxidation process to convert the nitrogen oxide to nitrogen dioxide, which is then removed with a wet scrubber using a proprietary, highly efficient, low-toxic scrubbing chemistry.
		Shaw solicited bids from producers of nitrogen oxide wet scrubber systems to supply a complete package to meet the automatic ventilation needs of the furnaces and reduce all nitrogen oxide emissions with a minimum efficiency of 98 percent.
		The DRI-NOx proprietary catalyst holds the nitric oxide for sufficient time to react with the oxygen contained in the gas stream to convert the nitrogen oxide to dioxide.
	www.bionomicind.com /pages/news8.html (1141 words)

	Nitrous Oxide Plant, Nitrous Oxide Machine, Nitrous Oxide Manufacturers.
		Nitrous Oxide is produced by heating Ammonium Nitrate to a temperature of 250 Deg.C. Ammonium Nitrate is decomposed in the process to give a mixture of Nitrous Oxide and super heated steam.
		Nitrous Oxide is a chemical compound of Nitrogen and Oxygen.
		The most common way of distributing Nitrous oxide is as a compressed liquid in Cylinders of the same kind, as used for oxygen, Nitrogen etc. The pressure in Nitrous oxide cylinders is approximately 50 Bars at 20 Deg.C. It is stable and comparatively un-reactive chemical compound at ordinary temperatures.
	www.sanghioverseas.org /nitrous-oxide-plants.html (623 words)

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