ozone


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ozone

 [o´zōn]
a bluish explosive gas or blue liquid, being an allotropic form of oxygen, O3; it is antiseptic and disinfectant, and irritating and toxic to the pulmonary system. Ozone that is carried in the air is odorless and colorless.

Ozone is artificially produced when automobile exhaust fumes combine with nitrogen oxide in the presence of sunlight and high temperatures. This leads to ozone pollution. Federal standards have been established to determine when the level of ozone in atmospheric air is unhealthful.
ozone alert a warning issued by health and environmental officials during periods of excessive ozone pollution for those individuals most sensitive to ozone, such as the very young, the elderly, and ill individuals, especially those with respiratory conditions. Advice is to remain indoors and limit physical activity. Healthy individuals are also advised to limit outdoor activity.

o·zone

(ō'zōn),
O3; a powerful oxidizing agent; air containing a perceptible amount of O3 formed by an electric discharge or by the slow combustion of phosphorus, and has an odor suggestive of Cl2 or SO2; also formed by the action of solar UV radiation on atmospheric O2.
[G. ozō, to smell]

ozone

(o´zōn) a bluish explosive gas or blue liquid, being an allotropic form of oxygen, O3; it is antiseptic and disinfectant, and irritating and toxic to the pulmonary system.

ozone

(ō′zōn′)
n.
1. An unstable, poisonous allotrope of oxygen, O3, that is formed naturally in the ozone layer from atmospheric oxygen by electric discharge or exposure to ultraviolet radiation, also produced in the lower atmosphere by the photochemical reaction of certain pollutants. It is a highly reactive oxidizing agent used to deodorize air, purify water, and treat industrial wastes.
2. Informal Fresh, pure air.

o·zo′nic (ō-zō′nĭk, ō-zŏn′ĭk), o′zon′ous (ō′zō′nəs) adj.

ozone (O3)

Etymology: Gk, ozein, to have an odor
an allotropic form of oxygen consisting of molecules containing three oxygen atoms. Ozone is formed when oxygen is present in an electric discharge, as might occur in a lightning storm. Ozone is used as a bleaching, cleaning, and oxidizing agent and has a faint, chlorinelike odor.
Ozone is the most widespread form of air pollution. When inhaled, ozone irritates the lungs, resulting in something like a bad sunburn. The health effects of breathing ozone pollution can be immediate and include wheezing, coughing and asthma attacks

o·zone

(ō'zōn)
A powerful oxidizing agent; air containing a perceptible amount of O3 formed by an electric discharge or by the slow combustion of phosphorus; also formed by the action of solar UV radiation on atmospheric O2.
[G. ozō, to smell]

ozone

A gas consisting of molecules in which three atoms of oxygen are linked together. Concentrated ozone is a blue explosive liquid. Even in low concentrations the gas is poisonous and highly irritating. The ozone layer in the stratosphere, between 10 and 50 km above the earth's surface, is produced continuously by the action of ultraviolet radiation from the sun and forms a protective barrier, cutting down the intensity of the ultraviolet component in sunlight. Without the ozone layer we would suffer serious biological effects from solar radiation, including a large increase in the incidence of skin cancer. Atmospheric ozone is broken down by the catalytic action of chloro-fluoro-carbons (CFCs) and other substances. Recent studies have shown that ozone is involved in the oxidative stress production of ATHEROSCLEROSIS in arteries. Cholesterol is converted by ozone to 5,6-secosterol which is cytotoxic and induces the formation of foam cells in the presence of low-density lipoproteins.

Ozone

A form of oxygen with three atoms in its molecule (O3), produced by an electric spark or ultraviolet light passing through air or oxygen. Ozone is used therapeutically as a disinfectant and oxidative agent.
Mentioned in: Ozone Therapy, Sunscreens

ozone

a bluish explosive gas or blue liquid, being an allotropic form of oxygen, O3; it is antiseptic and disinfectant, and irritating and toxic to the pulmonary system.
References in periodicals archive ?
Thirty-six major government agencies across the United States are working to reduce ground-level ozone concentrations.
Along with ozone and oxides of nitrogen, peroxides and free radicals are oxidants, which are highly corrosive.
Happer's problems were all the worse because he had earlier tangled with America's ozone czar, Robert Watson.
For the past year, Rodrick has tested a commercial ozone sanitizing system developed by Innovative Food Safety, Global Technology Systems.
Supervising Meteorologist Evan Shipp said the San Joaquin Valley has had a record number of days over 100 degrees, but ozone levels have not risen as expected.
0 ppm ozone for three hours had an even greater effect on the tensile properties of the NRL condoms (table 1).
Here in the park, Duriscoe told me, some 10 percent of trees overall showed some level of ozone damage, even though only one out of a thousand might die from ozone itself.
The ozone gas is piped to long cement chambers and bubbled through untreated water to quickly disintegrate pathogens.
We see very clearly that chlorine from CFCs is going down in the ozone hole, and that less ozone depletion is occurring because of it,' said lead author Susan Strahan, an atmospheric scientist from NASA's Goddard Space Flight Centre in Greenbelt, Maryland.
EuOTA also works to improve the education, information and regulation around the use of Ozone, ensuring efficient and safe products and practices are maintained at all times.
NOAA ground- and balloon-based measurements also showed the least amount of ozone depletion above the continent during the peak of the ozone depletion cycle since 1988.
International Day for the Preservation of the Ozone the Earth's ozone layer plays an important role in protecting human health and the environment.