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Founded in 1879 and named after Texas' greatest hero General Sam Houston, Sam Houston State University is public shcool within the Texas state university system and located in Huntsville, Texas.
It's a multicultural institution that offers 79 bachelorette degree programs, 54 masters and five ...
N<sub>2</sub>O, this is a by-product of biological activity of a symbiotic bacteria living in leguminous plant roots. It is a principal greenhouse gas that absorbs in the infrared wavelength region and unfortunately falls in an IR "window" between IR absorbing features of water and carbon dioxide (a characteristic of all the "trace" greenhouse gases with significant radiative forcing). It is also laughing gas used in medicine as a gentle general anesthetic. It is not an oxide of nitrogen in the NO<sub>x</sub> "family. "
Industry:Chemistry; Weather
N<sub>2</sub>O<sub>5</sub>, a compound that contributes to ozone depletion during springtime in the Antarctic. This occurs because ozone converts some nitrogen dioxide radical to nitrogen trioxide radical, which combines with other dinitrogen radicals to produce dinitrogen pentoxide. The reaction is reversible except in the presents of stratospheric liquid droplets where nitric acid occurs. This reaction ties up the nitrogen dioxide radical allowing more chlorine atoms to be present in the active form.
Industry:Chemistry; Weather
Natural and artificially emitted hydrocarbons in the presence of oxides of nitrogen undergo photochemical reactions which produce a cloud of toxic chemicals including ozone and a variety of harmful chemical gaseous and particulate agents. This process is powered by sunlight and some of the products, such as ozone, reach a peak soon after photon flux from the sun reaches a maximum, around midday. The thermal inversions often associated with some cities can lead to a dangerous buildup of smog in urban areas. Human deaths have been attributed to photochemical smog since the Industrial Revolution in cities such as London and New York.
Industry:Chemistry; Weather
Nearly all of the planet's natural ozone in the atmosphere is found in the stratosphere. The thickness and distribution of this stratospheric ozone vary seasonally and by location. Ozone also occurs in the troposphere as a pollutant, often in photochemical smog.
Industry:Chemistry; Weather
Nimbus is a term used to describe a cloud that is precipitating.
Industry:Chemistry; Weather
Nitrogen cycling is an extremely important natural process, in which nitrogen-containing species such as ammonia, nitrate, and nitrite, are absorbed into the soil, atmosphere or the ocean and are used by many living organisms to produce amino acids and proteins or other volatile gases. This movement of nitrogen between living organisms, soil, water, and atmosphere is a crucial part of crop production on earth. Interactive animation of the nitrogen cycle.
Industry:Chemistry; Weather
NO is the principal emitted NO<sub>x</sub> gas from high temperature combustion in air. This gas can acts as a catalyst in the reactions that cause the destruction or creation of ozone: At high concentrations, NO consumes O<sub>3</sub> in urban environments but NO is also oxidized to NO<sub>2</sub> by alkyl peroxy radicals and that NO<sub>2</sub> can subsequently be photolyzed by sunlight to free atomic oxygen, which quickly produces ozone (see nitrogen dioxide). Reacting with ozone and tropospheric radicals, NO is inextricably linked with the polluted urban atmospheric production of NO<sub>2</sub>, ozone, and other secondary pollutants such as peroxyacetyl nitrate.
Industry:Chemistry; Weather
NO is the principal emitted NO<sub>x</sub> gas from high temperature combustion in air. This gas can acts as a catalyst in the reactions that cause the destruction or creation of ozone: At high concentrations, NO consumes O<sub>3</sub> in urban environments but NO is also oxidized to NO<sub>2</sub> by alkyl peroxy radicals and that NO<sub>2</sub> can subsequently be photolyzed by sunlight to free atomic oxygen, which quickly produces ozone (see nitrogen dioxide). Reacting with ozone and tropospheric radicals, NO is inextricably linked with the polluted urban atmospheric production of NO<sub>2</sub>, ozone, and other secondary pollutants such as peroxyacetyl nitrate.
Industry:Chemistry; Weather
No longer intentionally produced by industrial plants in the United States as an end product. In the past it was often used as a solvent and was a component found in several pesticides. There are several health hazards associated with short term and long term exposure. Long term exposure leads to damage of the central nervous system and liver. It is a colorless liquid that has a sweet chloroform odor, has a molecular weight of 167. 85 g/mol, melting point of -43. 8 degrees C, and is a corrosive liquid.
Industry:Chemistry; Weather
NO<sub>2</sub>, is the lesser of the two emitted NO<sub>x</sub> gases from high temperature combustion in air; NO the other. NO<sub>x</sub> production occurs in all internal combustion engines that use atmospheric oxygen from the air as oxidant, a process that brings atmospheric N<sub>2</sub> along with it. NO<sub>2</sub> is a very important species in the atmosphere. Since it absorbs in the visible wavelength region--creating the Brown Cloud over Denver, LA, Mexico City, Beijing, etc. --and can be photolyzed and yield oxygen atoms that can react with molecular oxygen to create ozone, NO<sub>2</sub> and the NO/NO<sub>2</sub> ratio are important in tropospheric chemistry. See nitrogen monoxide.
Industry:Chemistry; Weather
