Eugen Angelescu
Eugen I. Angelescu , (born January 4, 1896 in Nascut near Râmnicu Vâlcea ; † February 19, 1968 in Bucharest ) was a Romanian chemist ( organic chemistry , colloid chemistry , physical chemistry ).
Life
Angelescu studied from 1913 at the University of Bucharest , interrupted from military service in the First World War from 1916 as a pioneer officer, from 1920 to 1924 at the University of Rome, where he received his doctorate in 1922 under Emanuele Paternò (and Pietro Leone) . From 1919 he was an assistant and after his habilitation in 1929 lecturer for physical chemistry at the University of Bucharest, where he was associate professor in 1930 and full professor of organic chemistry in 1936.
From 1938 he was a corresponding and from 1953 full member of the Romanian Academy and in 1935 a founding member of the Romanian Academy of Sciences (Academia de Științe din România).
He was married to the chemist Elena Angelescu and had three children.
plant
He is considered the founder of colloid chemistry in Romania and discovered the Angelescu effect named after him. He studied the colloidal properties (viscosity, surface tension) of soap solutions (for various fatty acids) with cresols and found a maximum viscosity when the creosol content varied. He explained the maximum viscosity at medium degrees of dispersion as a result of lysosorption (absorption on surfaces), i.e. the simultaneous action of two dissolution mechanisms, an external one - corresponding to the usual dissolution process in a polar liquid - and an internal one corresponding to a kind of swelling ( Penetration of the solution molecules into the particles). The first work on this was published in 1930.
In addition to solutions and dispersions - where he also introduced the furfural point to characterize vegetable oils ( furfural is a solvent used in oil refining) - he dealt with organic chemistry, especially aromatic amines.
Fonts
- Introduction to Physical Chemistry, 1940 (Romanian)
literature
- Winfried Pötsch u. a. Lexicon of important chemists , Harri Deutsch 1989
- Georgea Popescu: Eugen Angelescu- the founder of the romanian school of colloidal chemistry, pdf
- Klaus Beneke, Eugen Angelescu and the Angelescu-Effekt, Mitteilungen der Kolloidgesellschaft 1999, pp. 255–273, University of Kiel, pdf
References and comments
- ↑ Then and now used as an insecticide and disinfectant
- ^ Angelescu, DM Popescu Articles on the knowledge of the colloid chemistry of the system: Seifen-Kresol-Wasser , Kolloid-Zeitschrift, Volume 51, 1930, 247-257, 336-348
| personal data | |
|---|---|
| SURNAME | Angelescu, Eugene |
| ALTERNATIVE NAMES | Angelescu, Eugene I. |
| BRIEF DESCRIPTION | Romanian chemist (organic chemistry, colloid chemistry, physical chemistry) |
| DATE OF BIRTH | 4th January 1896 |
| PLACE OF BIRTH | Nascut at Râmnicu Vâlcea |
| DATE OF DEATH | 19th February 1968 |
| Place of death | Bucharest |