Retentivity of gases

Pattle, R. E. The retention of gases and particles in the human nose. pp. 302-311. In C. N. Davies, Ed. Inhaled Particles and Vapours. Proceedings of an International Symposium organized by the British Occupational Hygiene Society. Oxford, 1960. Oxford Pergamon Press, 1%1. 

Dry The interception and retention by surfaces of gases or particulate matter by diffusion, gravitational settling, or thermal forces. 

Greenhouse effect The retention of heat by the earth and the atmosphere due to certain gases being transparent to incoming solar radiation but opaque to the longer-wave radiation back from the earth. 

Landahl, H.D. and R.G.Herrmann. 1950. Retention of vapors and gases in the human nose and lung. Arch. Indust. Hyg. Occup. Med. 1 36-45. 

Leong, B.K.J. and MacFarland, H.N. (1965). Pulmonary dynamics and retention of toxic gases. Arch. Environ. Health 11 555-563. 

Greenhouse effect The warming of Earth s atmosphere as a result of the retention of solar radiation. This retention is possible because insolation absorbed by the land and ocean is radiated back to the atmosphere as IR energy. This energy is absorbed by atmospheric gases and then radiated from them as heat. 

Fignre 12-19 Pulse injection of gases or liquids into a chromatographic column with carrier gas or liquid for species A, B, and C. The chromatogram is recorded as the signal versus retention time in the column. 

Owing to the retention of the tar by the layer of stones, tha scrubbers would get dogged from it, were there no provision made for cloansing them. The means adopted is to inject steam into them once in the day, by which the tar is melted, and in this state flows out at the bottom of the tank. From 8 the combustible gases are oarried off by a duct, from which, by other channels, it is taken to the several flame-beds, where it is consumed. 

Postactivation annealing fission product release measurements have shown that the excellent retention of iodine and noble fission gases by pyrolytic carbon-coated fuel particles is unaffected by irradiation up to 24% FIMA. These data are interpreted as indicating that the pyrolytic carbon coatings remain undamaged by these high levels of irradiation. 

MOLECULE, hi the traditional sense, a molecule is the smallest particle of a chemical substance capable of independent existence with retention of all its chemical properties. Molecules comprise one or more atoms which need not be of the same kind. Only the rare, or noble gases form single-atom or monatomic molecules. All other elements form bi-. Iri. quudrt-. etc. atomic molecules, e.g.. hydrogen. H ozone. O-, phosphorus. P4 and sulfur, Sx or hydrogen chloride. IICI sodium sullide. Na S. aluminum chloride, AlClu carbon tetrachloride. C CI. and so on. 

Polyethylene is water-resistant and is a good water vapor barrier. Less than 0.1% water is absorbed in a 2-inch (5-centimeter), 1/8-inch (3-millimeter) thick disk of polyethylene in 24 hours. Transmission of other gases is high when compared with that of most other plastics. Polyethylene is not satisfactory for retention of vacuum. 

When properly handled, a vacuum line is a true joy to use because it provides a closed reaction vessel with excellent exclusion of air, quantitative retention of all reaction products, and a ready means for the transfer and quantitative measurement of gases. 

L6pez-Ant6n, M.A., Dfaz-Somoano, M., Fierro, J.L.G. and Martfnez-Tarazona, M.R. (2007) Retention of arsenic and selenium compounds present in coal combustion and gasification flue gases using activated carbons. Fuel Processing... 

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