A colorless, odorless gas, and the most abundant element on Earth, occurring in the crust, in fresh water and sea-water, and in the atmosphere, of which it forms 21 per cent by volume
the essential element in the respiration process to sustain life This colorless, odorless gas makes up about 21 percent of the air Oxygen may be prescribed if your lungs are not getting enough oxygen to your blood Breathing prescribed oxygen increases the amount of oxygen in your blood, reduces the extra work of the heart and decreases shortness of breath
Can exist as a gas or dissolved in solution Oxygen forms various inorganic compounds with metals as well as organic compounds with carbon, hydrogen, nitrogen and other elements O2 (gas) is vital to life whereas O3, ozone, can be harmful due to its ability to oxidize biological tissue, metals, organic compounds and other materials See Ozone
A colorless, ordorless, tasteless gas, that is the most abundant of the elements on earth occuring uncombined to the extent of about 21 percent by volume
a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
A gaseous element, atomic number 8, relative atomic mass 15 9994, symbol O Oxygen is a colourless, odourless gas which supports combustion in air Molecular oxygen (O2) constitutes 20 95% by volume of dry air in the lower part of the atmosphere O2 is essential for the maintenance of almost all forms of life Above an altitude of 20 km atomic oxygen appears in significant amounts and at 100 km it is in the predominant form For the tri-atomic form of oxygen, see ozone
A colorless, tasteless, odorless, gaseous element occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, being slightly heavier than nitrogen
A gas which comprises about 21% of normal air Yeast require oxygen for healthy reproduction; this is why the wort should be aerated at pitching time At any other stage of the brewing or fermentation process, oxygen is not desirable, because it can oxidize compoinds in the wort or beer, resulting in stale flavors
Oxygen is a colourless gas that exists in large quantities in the air. All plants and animals need oxygen in order to live. The human brain needs to be without oxygen for only four minutes before permanent damage occurs. a gas that has no colour or smell, is present in air, and is necessary for most animals and plants to live. It is a chemical element : symbol O (oxygène, from oxys + -gène ; because it was believed that oxygen forms part of all acids). Gaseous chemical element, chemical symbol O, atomic number
A gas in the atmosphere that is essential to most life forms In humans, oxygen is absorbed into the lungs from the air we breathe It attaches to hemoglobin in red blood cells in the blood to be carried throughout the body
One of the nine macronutrients Oxygen is a major component of organic molecules, which are the building blocks of all organisms Humans breath air, plants "breath" carbon dioxide (CO2) Respiration breaks CO2 into carbon and oxygen for use Plants also take in oxygen through their roots
It constitutes 21% (by volume) of air and more than 46% (by weight) of Earth's crust, where it is the most plentiful element. It is a colourless, odourless, tasteless gas, occurring as the diatomic molecule O2. In respiration, it is taken up by animals and some bacteria (and by plants in the dark), which give off carbon dioxide (CO2). In photosynthesis, green plants assimilate carbon dioxide in the presence of sunlight and give off oxygen. The small amount of oxygen that dissolves in water is essential for the respiration of fish and other aquatic life. Oxygen takes part in combustion and in corrosion but does not itself burn. It has valence 2 in compounds; the most important is water. It forms oxides and is part of many other molecules and functional groups, including nitrate, sulfate, phosphate, and carbonate; alcohols, aldehydes, carboxylic acids, and ketones; and peroxides. Obtained for industrial use by distillation of liquefied air, oxygen is used in steelmaking and other metallurgical processes and in the chemical industry. Medical uses include respiratory therapy, incubators, and inhaled anesthetics. Oxygen is part of all gas mixtures for manned spacecraft, scuba divers, workers in closed environments, and hyperbaric chambers. It is also used in rocket engines as an oxidizer (in liquefied form) and in water and waste treatment processes
A colorless, odorless, tasteless gas Most life on earth requires oxygen to live Animals breathe oxygen out of the air or water Plants also need oxygen, even though they produce oxygen by photosynthesis
Oxygen is one of the chief constituents of the atmosphere of which it forms approximately one fifth It is odourless and invisible Although oxygen itself does not burn it is extremely efficient in supporting combustion, nearly all other chemical elements combine with it under evolution of heat It has many uses in industry and is essential to the BOS (Basic Oxygen Steelmaking Process)
Colorless odorless gas that makes up about 20 percent of the air we breathe; it is essential to life because it is used for the chemical reactions that occur in the cells of the body
oxygenless
Этимология
[ 'äk-si-j&n ] (noun.) 1790. French oxygène, from Greek oxys, adjective, acidic, literally, sharp + French -gène -gen; akin to Latin acer sharp; more at EDGE.