ExpertGlossary terms starting with O

1,317 terms

  1. oxygen therapy (OK-sih-jen THAYR-uh-pee) Treatment in which a storage tank of oxygen or a machine called a compressor is used to give oxygen to people with breathing…
  2. oxygen-electrode-based sensor Sensor in which an oxygen electrode, which measures the amount of oxygen in a solution, is coated with a biological material such as an enzyme which…
  3. Oxygenate A cleaner-burning additive in a fuel—usually containing hydrogen, carbon, and oxygen. Examples are ethers and alchohols, such as ethanol and methanol.
  4. Oxygenated Fuels Fuels blended with an additive—usually ether or ethanol—to increase oxygen content, allowing more-thorough combustion for reduced carbon monoxide…
  5. Oxygenated gasoline Gasoline containing an oxygenate.
  6. Oxygenates Gasoline fuel additives such as ethanol, ETBE, or MTBE that add extra oxygen to gasoline to reduce carbon monoxide pollution produced by vehicles.
  7. Ozonation The application of ozone to water for disinfection or for taste and odor control.
  8. Ozone Tropospheric ozone (ground-level ozone), or smog, is formed when volatile organic compounds, oxygen and nitrogen oxides react in the presence of sunlight.
  9. Ozone (O3) A strong-smelling, reactive, toxic, chemical gas consisting of three oxygen atoms chemically attached to each other.
  10. Ozone (O<sub>3</sub>) A colorless gas with a pungent odor, having the molecular form of O3 , found in two layers of the atmosphere, the stratosphere (about 90% of the total…
  11. Ozone Action Day A "heads-up" message issued by the Department of Natural Resources (DNR) through the National Weather Service when ozone levels may reach dangerous levels…
  12. Ozone Advisory It is issued by the Department of Natural Resources (DNR) through the National Weather Service when ozone levels reach 100.
  13. Ozone Depleting Substance (ODS) A family of man-made compounds that includes, but are not limited to, chlorofluorocarbons (CFCs), bromofluorocarbons (halons), methyl chloroform, carbon…
  14. Ozone Hole A severe depletion of stratospheric ozone over Antarctica that occurs each spring. The possibility exists that a hole could form over the Arctic as well.
  15. Ozone Layer An atmospheric layer that contains a high proportion of oxygen that exists as ozone.
  16. Ozone Precursors Chemical compounds, such as carbon monoxide, methane, non-methane hydrocarbons, and nitrogen oxides, which in the presence of solar radiation react with…
  17. Ozone shield Ozone shield Stratospheric ozone layer, giving protection to the Earth's surface due to intense absorption of harmful solar ultraviolet radiation by the…