wein.plus
Attention
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

Schlieren

See under turbidity.

Term for the subjective, optical impression of a solid, gas or liquid that is transparent in its "normal state". It is caused by small particles that have a refractive index that differs from that of the carrier material or that cause adsorption. In the past, the turbidity of a liquid was measured with a transparent container. On the back of this was a viewing panel (similar to an eye test at an ophthalmologist), which was viewed through the liquid. The number that could just be read corresponded to the measured turbidity. However, this method was very imprecise and also dependent on the eyesight and additionally on the subjective feeling of the test person. In order to be able to measure turbidity in a comparable way, the turbidity standard liquid formazin was created. Turbidity units are FAU, FNU, FTU and TE/F (in water treatment) as well as EBC (European/international unit, used in...

Voices of our members

Sigi Hiss

There is a vast number of sources on the web where one can acquire knowledge about wine. But none has the scope, timeliness and accuracy of the information in the encyclopaedia at wein.plus. I use it regularly and rely on it.

Sigi Hiss
freier Autor und Weinberater (Fine, Vinum u.a.), Bad Krozingen

The world's largest Lexicon of wine terms.

26,382 Keywords · 46,989 Synonyms · 5,323 Translations · 31,716 Pronunciations · 202,680 Cross-references
made with by our author Norbert F. J. Tischelmayer. About the Lexicon

EVENTS NEAR YOU

PREMIUM PARTNERS