You are using an old browser that may not function as expected.
For a better, safer browsing experience, please upgrade your browser.

Log in Become a Member

Reverse osmosis

See under osmosis.

The passage of liquid through a semi-permeable partition, for example clay or parchment paper or cell walls in living organisms, which separates two liquids of different concentrations. Osmosis also plays a major role in metabolism. The phenomenon was discovered by the Danish chemist Jacobus Hoff (1852-1911) in 1874. This partition (also known as a diaphragm) is only permeable to the molecules of a liquid (e.g. water), but not to the dissolved substance (e.g. sugar molecules) due to the corresponding pore size. Diffusion (flowing apart) takes place towards the concentrated solution. If a container-1 (with a semi-permeable outer wall) with a highly concentrated solution (e.g. sugar water) is placed in a container-2 with pure water so that there is an equal liquid level in both containers, then the water molecules migrate towards container-1.

Osmose - Schema

The water molecules are "sucked in", so to speak, because there are fewer water molecules there. The level in container 1 rises (limit value) until the...

Voices of our members

Prof. Dr. Walter Kutscher

In the past, you needed a wealth of encyclopaedias and specialist literature to keep up to date in your vinophile professional life. Today, Wine lexicon from wein.plus is one of my best helpers and can rightly be called the "bible of wine knowledge".

Prof. Dr. Walter Kutscher
Lehrgangsleiter Sommelierausbildung WIFI-Wien

The world's largest Lexicon of wine terms.

26,384 Keywords · 46,991 Synonyms · 5,323 Translations · 31,718 Pronunciations · 202,738 Cross-references
made with by our author Norbert F. J. Tischelmayer. About the Lexicon