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Topic: Nitrogen


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In the News (Sun 23 Sep 18)

  
  Nitrogen narcosis
Nitrogen narcosis, commonly referred to as "rapture of the deep," typically becomes noticeable at 100 ft underwater and is incapacitating at 300 ft, causing stupor, blindness, unconsciousness, and even death.
Nitrogen narcosis is caused by gases in the body acting in a manner described by Dalton's Law of partial pressures: the total pressure of a gas mixture is equal to the sum of the partial pressures of gases in the mixture.
Nitrogen narcosis may be differentiated from toxicity of oxygen, carbon monoxide, or carbon dioxide by the absence of such symptoms as headache, seizure, and bluish color of the lips and nail beds.
www.healthatoz.com /healthatoz/Atoz/ency/nitrogen_narcosis.jsp   (669 words)

  
  Nitrogen - LoveToKnow 1911
In the combined state nitrogen is fairly widely distributed, being found in nitre, Chile saltpetre, ammonium salts and in various animal and vegetable tissues and liquids.
In a purer condition it may be obtained by the action of sulphuric acid on a mixture of potassium nitrate and ferrous sulphate, or of hydrochloric acid on a mixture of potassium nitrate and ferric chloride.
Nitrogen combines with hydrogen to form ammonia, NH 3, hydrazine, N 2 H 4, and azoimide, N 3 H (qq.v.); the other known hydrides, N 4 H 4 and N5H5, are salts of azoimide, viz.
www.1911encyclopedia.org /Nitrogen   (3505 words)

  
  Nitrogen - Wikipedia, the free encyclopedia
The earliest industrial and agricultural applications of nitrogen compounds used it in the form of saltpeter (sodium- or potassium nitrate), notably in gunpowder, and much later, as fertilizer, and later still, as a chemical feedstock.
Nitrogen is the largest single component of the Earth's atmosphere (78.084% by volume, 75.5% by weight) and is acquired for industrial purposes by the fractional distillation of liquid air or by mechanical means of gaseous air (i.e.
Nitrogen also dissolves in the bloodstream, and rapid decompression (particularly in the case of divers ascending too rapidly) can lead to a potentially fatal condition called decompression sickness, when nitrogen bubbles form in the bloodstream.
en.wikipedia.org /wiki/Nitrogen   (1603 words)

  
 Nitrogen - MSN Encarta
Nitrogen was isolated by the Scottish chemist Daniel Rutherford in 1772 and recognized as an elemental gas by the French chemist Antoine Laurent Lavoisier about 1776.
Nitrogen in the form of protein is an important constituent of animal tissue.
The nitrogen so produced is very active, combining with alkali metals to form azides; with the vapor of zinc, mercury cadmium, and arsenic to form nitrides; and with many hydrocarbons to form hydrocyanic acid and cyanides, also known as nitriles.
encarta.msn.com /encyclopedia_761568106/Nitrogen.html   (597 words)

  
 9(s) The Nitrogen Cycle
Nitrogen is used by living organisms to produce a number of complex organic molecules like amino acids, proteins, and nucleic acids.
Decomposers, found in the upper soil layer, chemically modify the nitrogen found in organic matter from ammonia (NH to ammonium salts (NH This process is known as mineralization and it is carried out by a variety of bacteria, actinomycetes, and fungi.
Nitrogen in the form of ammonium can be absorbed onto the surfaces of clay particles in the soil.
www.physicalgeography.net /fundamentals/9s.html   (661 words)

  
 The Nitrogen Cycle   (Site not responding. Last check: )
Nitrogen (N) is an essential component of DNA, RNA, and proteins, the building blocks of life.
Nitrogen is an incredibly versatile element, existing in both inorganic and organic forms as well as many different oxidation states.
The movement of nitrogen between the atmosphere, biosphere, and geosphere in different forms is described by the nitrogen cycle (Figure 1), one of the major biogeochemical cycles.
www.visionlearning.com /library/module_viewer.php?mid=98   (1774 words)

  
 nitrogen. The Columbia Encyclopedia, Sixth Edition. 2001-05
In the Haber process, nitrogen is reacted with hydrogen to form ammonia; in the cyanamide process, nitrogen is reacted with calcium carbide at high temperatures to form calcium cyanamide; in the arc process, nitrogen is reacted with oxygen in an electric arc to form nitrogen oxides.
Nitrogen is present in living things; it and its compounds are necessary for the continuation of life (see nitrogen cycle).
Nitrogen compounds were known to alchemists as early as the Middle Ages, but nitrogen is formally considered to have been discovered by Daniel Rutherford in 1772, who called it noxious air or phlogisticated air (air from which the oxygen had been removed, usually by combustion).
www.bartleby.com /65/ni/nitrogen.html   (586 words)

  
 Nitrogen Narcosis | AHealthyMe.com
Nitrogen narcosis, commonly referred to as "rapture of the deep," typically becomes noticeable at 100 ft underwater and is incapacitating at 300 ft, causing stupor, blindness, unconsciousness, and even death.
Nitrogen narcosis is caused by gases in the body acting in a manner described by Dalton's Law of partial pressures: the total pressure of a gas mixture is equal to the sum of the partial pressures of gases in the mixture.
Nitrogen narcosis may be differentiated from toxicity of oxygen, carbon monoxide, or carbon dioxide by the absence of such symptoms as headache, seizure, and bluish color of the lips and nail beds.
www.ahealthyme.com /topic/topic100587218?_requestid=61631   (675 words)

  
 Nitrogen   (Site not responding. Last check: )
Nitrogen, as a gas, is colorless, odorless, and a generally inert element.
Nitrogen is used as a refrigerant both for the immersion freezing of food products and for transportation of foods.
Liquid nitrogen is also used in missile work as a purge for components, insulators for space chambers, etc., and by the oil industry to build up great pressures in wells to force crude oil upward.
www.scescape.net /~woods/elements/nitrogen.html   (447 words)

  
 Nitrogen (N) - Chemical properties, Health and Environmental effects
The greatest single commercial use of nitrogen is as a component in the manufacture of ammonia, subsequently used as fertilizer and to produce nitric acid.
Nitrogen is an essential element for life, because it is a constituent of DNA and, as such, is part of the genetic code.
Nitrogen is emitted extensively by industrial companies, increasing the nitrate and nitrite supplies in soil and water as a consequence of reactions that take place in the nitrogen cycle.
www.lenntech.com /Periodic-chart-elements/N-en.htm   (679 words)

  
 Nitrogen Dynamics - Manitoba Agriculture, Food and Rural Initiatives
To effectively manage nitrogen fertilizers, having an understanding of the processes which occur in the soil and making an effort to monitor nitrate levels in the soil and groundwater is an important step in ensuring an economically and environmentally sustainable operation.
Nitrogen exists in many different chemical forms, which determines whether nitrogen is available to plants or whether nitrogen escapes and is no longer available to plants.
Nitrogen may be found in air, water or land; nitrogen may exist in several different chemical forms; it will undergo many changes in form and location throughout the cycle due to processes which occur as a result of weather, plants, animals and humans.
www.gov.mb.ca /agriculture/soilwater/soilfert/fbd01s03.html   (1400 words)

  
 Nitrogen
Nitrogen is often used as an "inert" gas due to its nonreactive nature with many materials.
Gaseous nitrogen is used in the chemical and petroleum industries for storage tank blanketing and vessel inerting applications.
Liquid nitrogen, produced by the cryogenic air separation process, finds wide use as a refrigerant in applications such as cryogenic grinding of plastics and food freezing.
www.airproducts.com /Products/LiquidBulkGases/Nitrogen/default.htm   (147 words)

  
 Nitrogen   (Site not responding. Last check: )
Nitrogen, N2, is a colourless odourless gaseous non-metallic main group element which belong to Group Vb of the periodic table.
Nitrogen was discovered by D Rutherford in 1772 AD, when he reported in a thesis that it did not support life.
Nitrogen is the most abundant gas in the atmosphere, which is composed of approximately 78% nitrogen gas by volume, or 75.5% by weight.
www.ucc.ie /ucc/depts/chem/dolchem/html/elem/elem007.html   (270 words)

  
 ATSDR - ToxFAQs™: Nitrogen Oxides
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.
The reaction of nitrogen dioxide with chemicals produced by sunlight leads to the formation of nitric acid, which is a major constituent of acid rain.
www.atsdr.cdc.gov /tfacts175.html   (1109 words)

  
 It's Elemental - The Element Nitrogen
Nitrogen is obtained from liquefied air through a process known as fractional distillation.
Nitrogen gas is largely inert and is used as a protective shield in the semiconductor industry and during certain types of welding and soldering operations.
Liquid nitrogen is an inexpensive cryogenic liquid used for refrigeration, preservation of biological samples and for low temperature scientific experimentation.
education.jlab.org /itselemental/ele007.html   (186 words)

  
 The Nitrogen Family: NITROGEN!!
Nitrogen is a fairly common element in the Earth's crust.
Nitrogen gas is used where an inert atmosphere (one without oxygen) is needed, such as in an ordinary light bulb.
Nitrogen gas is not toxic, but, in principle, pure nitrogen could asphyxiate the body by denying it access to oxygen.
www.carondelet.pvt.k12.ca.us /Family/Science/Nitrogen/nitrogen.html   (404 words)

  
 Slow Release Nitrogen Compare Greenview™ and Scotts™
Nitrogen affects many metabolic processes within the turf plant, but the most visible effects of nitrogen in turf are growth and color.
Nitrogen is used by vascular plants in the ammonium form and nitrate forms.
The nitrogen guarantee of any fertilizer can be compared to any other fertilizer to determine how they compare on the basis of total nitrogen, ammoniacal nitrogen, urea, nitrogen, water insoluble nitrogen, and other soluble nitrogen and so on.
www.greenviewfertilizer.com /online/articles/article_Comparisons_Greenview_vs_Scotts-nitrogen.jsp   (1635 words)

  
 Nitrogen
Nitrogen is found in all living systems as part of the makeup of biological compounds.
Nitrogen, as a gas is colorless, odorless, and generally considered an inert element.
Although nitrogen gas is relatively inert, bacteria in the soil are capable of “fixing” the nitrogen into a usable form (as a fertilizer) for plants.
cse.ssl.berkeley.edu /chips_epo/Nitrogen.htm   (452 words)

  
 Nitrogen
Purpose: Nitrogen (N) is important for plant growth and development, and of the macronutrients, is often the one that is most limiting.
Nitrogen in the soluble forms is mobile in the soil, and nitrate can be leached below the root zone of the crop.
Knowing the content of plant available nitrogen is important to assure that the crop has enough for adequate growth, but excess nitrogen is not running off the field.
www.oznet.ksu.edu /kswater/images/nitrogen.htm   (713 words)

  
 Nitrogen Cycle
Nitrogen will only react with oxygen in the presence of high temperatures and pressures found near lightning bolts and in combustion reactions in power plants or internal combustion engines.
Nitrogen in the air becomes a part of biological matter mostly through the actions of bacteria and algae in a process known as nitrogen fixation.
Nitrogen and hydrogen are reacted under great pressure and temperature in the presence of a catalyst to make ammonia.
www.elmhurst.edu /~chm/vchembook/307nitrogen.html   (277 words)

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