
Atmolysis (Gr. ατμις, vapour; λυειν, to loosen), a term coined by Thomas Graham to denote the separation of a mixture of gases by taking advantage of their different rates of diffusion through a porous septum or diaphragm. ---- ...
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http://en.wikipedia.org/wiki/Atmolysis

• (n.) The act or process of separating mingled gases of unequal diffusibility by transmission through porous substances.
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http://thinkexist.com/dictionary/meaning/atmolysis/
At·mol'y·sis noun [ Greek ... vapor + ... a loosing, ... to loose.]
(Chemistry) The act or process of separating mingled gases of unequal diffusibility by transmission through porous substances.
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http://www.encyclo.co.uk/webster/A/139

Type: Term Pronunciation: at-mol′i-sis Definitions: 1. Separation of mixed gases by passing them through a porous diaphragm, the lighter gases diffusing through at a faster rate.
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http://www.medilexicon.com/medicaldictionary.php?t=8303

Atmolysis is a method of separating the constituent gases of a compound gas (such as air) by causing it to pass through a vessel of porous material (such as graphite). The process was discovered by Graham and made known in 1863.
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http://www.probertencyclopaedia.com/browse/GA.HTM

atmolysis 1. The separation of gases by exploitation of their differing diffusibilities. 2. The disintegration of organic tissue by contact with the fumes of toxic volatile fluids. 3. Separation of mixed gases by passing them through a porous diaphragm, the lighter gases diffusing through at a faster rate.
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http://www.wordinfo.info/words/index/info/view_unit/243/

a process for separating gases or vapors of different molecular weights by transmission through a porous substance.
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https://www.infoplease.com/dictionary/atmolysis
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