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oxygen - Wiktionary.
Borrowed from French oxygène originally in the form principe oxygène, a variant of principe oxigine 'acidifying' principle, suggested by Lavoisier from Ancient Greek ὀξύς oxús, sharp γένος génos, birth, referring to oxygen's' supposed role in the formation of acids. enPR: ŏk'sĭjən' IPA key: ˈɒksɪdʒən. English Wikipedia has an article on.: oxygen countable and uncountable, plural oxygens.
How much do oceans add to world's' oxygen? Earth EarthSky.
By the way, by about 400 million years ago, scientists say, enough oxygen had accumulated in Earths atmosphere for the evolution of air-breathing land animals. But free oxygen by itself wasnt enough. Another form of oxygen was also essential: the build-up of a special kind of oxygen at the top of Earths atmosphere.
The Element Oxygen - Oxygen Atom.
Many metals such as Iron bond with oxygen atoms, iron III oxide Fe 2 O 3 Ozone O 3 is formed by electrostatic discharge in the presence of molecular oxygen. A double oxygen molecule O 2 2 is known, found as a minor component of liquid oxygen.
Oxygen O - Chemical properties, Health and Environmental effects.
The oxygen in the Earth's' atmosphere comes from the photosyntesis of plants, and has built up in a long time as they utilised the abundant supply of carbon dioxide in the early atmosphere and released oxygen. Oxygen is fairly soluble in water, which makes life in rivers, lakes and oceans possible.
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Oxygen therapy for acutely ill medical patients: a clinical practice guideline The BMJ.
Recommendation 2 - lower limit 90-92. or Oxygen therapy No oxygen therapy Oxygen therapy No oxygen therapy Provision of supplemental oxygen No provision of supplemental oxygen Applies to people with: or Acute stroke Acute myocardial infarction Oxygen saturation of 90-92 on ambient air.
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Oxygen UCAR Center for Science Education. UCAR Center for Science Education. Explore Inspire Engage. National Center for Atmospheric Research. University Corporation for Atmospheric Research. Visit us on Facebook. Visit us on Twitter. Visit us on Instagra
Oxygen from photosynthetic microbes eventually built up in the atmosphere, drastically changing our planet's' environment and the history of life in the process. Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things.

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