“ozone”的概念、定义、翻译、参考文献-科学参考

ozone

Chemistry

A colourless gas, O₃, soluble in cold water and in alkalis; m.p. –192.7°C; b.p. –111.9°C. Liquid ozone is dark blue in colour and is diamagnetic (dioxygen, O₂, is paramagnetic). The gas is made by passing oxygen through a silent electric discharge and is usually used in mixtures with oxygen. It is produced in the stratosphere by the action of high-energy ultraviolet radiation on oxygen and its presence there acts as a screen for ultraviolet radiation (see ozone layer). Ozone is also one of the greenhouse gases (see greenhouse effect). It is a powerful oxidizing agent and is used to form ozonides by reaction with alkenes and subsequently by hydrolysis to carbonyl compounds.

Chemical Engineering

An unstable gas, O₃. It is formed naturally in the atmosphere and also by an electric discharge in oxygen. It has a bluish colour and distinctive odour and is used in the purification of air and water.

Geography

A form of oxygen, and an atmospheric trace gas, made by natural photochemical reactions associated with solar ultraviolet radiation. Ozone has three atoms of oxygen combined in one molecule, rather than two atoms, as in free oxygen. The proportion of ozone in the atmosphere is very small, but it is of vital importance in absorbing solar ultraviolet radiation. The ozone layer (ozonosphere), is an ozone-rich band of the atmosphere, at 10–20 km above the Earth, but is at its most concentrated between 20 and 25 km. See Schiermeier (2007) Nature 449. When the ozone layer thins (the ‘hole’ over Antarctica is an example) increased solar ultraviolet radiation reaches the surface of the Earth, with consequent damage to human health. See European Space Agency (2004), 5 October.

单词	ozone
释义	ozone Chemistry A colourless gas, O₃, soluble in cold water and in alkalis; m.p. –192.7°C; b.p. –111.9°C. Liquid ozone is dark blue in colour and is diamagnetic (dioxygen, O₂, is paramagnetic). The gas is made by passing oxygen through a silent electric discharge and is usually used in mixtures with oxygen. It is produced in the stratosphere by the action of high-energy ultraviolet radiation on oxygen and its presence there acts as a screen for ultraviolet radiation (see ozone layer). Ozone is also one of the greenhouse gases (see greenhouse effect). It is a powerful oxidizing agent and is used to form ozonides by reaction with alkenes and subsequently by hydrolysis to carbonyl compounds. Chemical Engineering An unstable gas, O₃. It is formed naturally in the atmosphere and also by an electric discharge in oxygen. It has a bluish colour and distinctive odour and is used in the purification of air and water. Geography A form of oxygen, and an atmospheric trace gas, made by natural photochemical reactions associated with solar ultraviolet radiation. Ozone has three atoms of oxygen combined in one molecule, rather than two atoms, as in free oxygen. The proportion of ozone in the atmosphere is very small, but it is of vital importance in absorbing solar ultraviolet radiation. The ozone layer (ozonosphere), is an ozone-rich band of the atmosphere, at 10–20 km above the Earth, but is at its most concentrated between 20 and 25 km. See Schiermeier (2007) Nature 449. When the ozone layer thins (the ‘hole’ over Antarctica is an example) increased solar ultraviolet radiation reaches the surface of the Earth, with consequent damage to human health. See European Space Agency (2004), 5 October.
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