| 单词 | reverse osmosis |
| 释义 | > as lemmasreverse osmosis reverse osmosis n. Physical Chemistry the process by which water or other liquid tends to flow across a membrane from a region of high solute concentration to one of lower concentration (the opposite direction to natural osmosis) when subjected to a hydrostatic pressure greater than the osmotic pressure.In quot. 1921, referring to a reversal of the direction of osmosis by the addition of salts. ΘΚΠ the world > matter > chemistry > physical chemistry > solvents and solutes > [noun] > reverse osmosis reverse osmosis1921 1921 T. J. Moon Biol. Beginners ix. 66 Summary [of ch. ix]... Root pressure. Meaning of term. Reverse osmosis. 1955 Ann. Rep. Saline Water Comm. 1954 (U.S. Dept. Interior) i. 10 Development of membranes and procedures for demineralization of saline water by reverse-osmosis methods are provided for in several contracts. 1970 New Scientist 14 May 337/3 Laboratory experiments have shown that cheddar cheese whey can be concentrated five-fold by reverse osmosis, or separated into a high-protein product. 1990 Healthy Eating Feb.–Mar. 55/1 Most household reverse osmosis systems also incorporate use of extra fine prefiltration which removes larger particles of dirt and sediment. 2006 Place in Sun May 26/3 It is a fairly slow process, but reverse osmosis is an economic way of creating drinkable water from salty (or otherwise contaminated) water. < as lemmas |
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