They offer one typewritten, signed letter ofphysical chemistWilhelm Kast (1896-1980).

Aimed at his GDR colleagues Dr. Christian Ruscher (1928-2016) from the Institute for Fiber Research in Teltow-Seedorf.

Concerns colloquia and termination of Kast's work as a research assistant at Bayer AG in Leverkusen.

Signed with full name.

Scope: one A4 page.

About the recipient Dr. Christian Ruscher: born On the 29th. January 1928 in Großröhrsdorf, died. on the 1st April 2016 in Berlin. 1955-1974 Wiss . Employee at the Academy Institute for Fiber Research in Teltow-Seedorf (establishment and management of the department. Fiber physics at the Institute for Fiber Research in Teltow-Seedorf), 1974 appointed professor at the academy of the Sciences of the GDR in Berlin, 1974-1980 Academy Professor at the Academy Institute for Fiber Research in Teltow-Seedorf, 1980-89 full Professor of Technical Physics at the Karl Marx University Leipzig.

Condition:Folded, slightly wrinkled, ins. good. Please also note the pictures!

Internal note: Folder 4c/7


About Wihelm Kast (source: wikipedia):

Wilhelm Kast (* 8. February 1896 in Halle an der Saale; † 9. January 1980 in Freiburg im Breisgau) was a German physical chemist who researched liquid crystals.

Life: Kast came from an old miner's family from the Harz Mountains, grew up in Halle, studied physics at the University of Halle from 1919 and received his doctorate there in 1922 under Julius Herweg with a dissertation on the dielectric constant of liquid crystals. As a post-doctoral student he worked with Gustav Mie at the University of Freiburg and completed his habilitation there in 1924[1] (Habilitation thesis: Investigations into the behavior of the anisotropic melt of para-azoxyanisole in a magnetic field). Afterwards he was a private lecturer there. In 1932/33 he was a Rockefeller fellow with Leonard Ornstein in Utrecht, but had already had contact with Ornstein through his scientific work. In 1937 he became associate professor of physics at the University of Halle and director of the institute, succeeding Gerhard Hoffmann. On the 1st In May 1937 he was accepted into the NSDAP. In 1945, like Rudolf Abderhalden and other scientists, he was forcibly deported by the Americans to the western occupation zones (Hesse) (so-called Abderhaltentransport) and released from the University of Halle in his absence. From 1947 he worked at Bayer AG in Dormagen, where he set up a laboratory for structural analysis of synthetic fibers using X-rays and electron beams. In 1954 he became an honorary professor in Cologne with a teaching position in the physics of macromolecular substances. In 1955, for health reasons, he moved to Freiburg, where he also became an honorary professor with a teaching position (Hermann Staudinger's school of macromolecular chemistry was there) and from 1959 was Professor Emeritus (status of full professor emeritus). He continued to teach and research afterwards (he continued teaching until 1967).

Work: In the 1920s, Kast studied liquid crystals based on their electrical-magnetic and optical properties, flow properties, calorimetry and X-ray structure analysis. His experiments led Ornstein to his sponge theory of liquid crystals and later formed the basis for widespread use in liquid crystal displays (LCD) and others. His research also contributed generally to the elucidation of the interactions of molecules in liquids, particularly in macromolecular chemistry. Before the Second World War he wanted to pursue a program to investigate the molecular theory of fluids, but then had to do applied research on the structure elucidation of synthetic fibers, which he continued after the war. At Bayer after the Second World War, he experimentally demonstrated the connection between the orientation of molecules and the structure of textiles and clarified the processes in spinning solutions using viscometry studies. In Freiburg he wrote an overview of liquid crystals and their physical-chemical properties for the Landolt-Börnstein (6. edition).

Honors and memberships

He was a member of the Leopoldina from 1939. In 1972 he was honorary president of an international conference on liquid crystals in Berlin.

Fonts

Fine structure studies on artificial cellulose fibers from various manufacturing processes, research reports from the state of North Rhine-Westphalia, Cologne: Westdeutscher Verlag, research reports from the North Rhine-Westphalia Ministry of Economics and Transport, No. 35, 1953 (Part 1: The Orientation State), No. 261, 1956 (Part 2: The crystallization state)

Spinning experiments to record the structure of artificial cellulose fibers, research reports from the North Rhine-Westphalia Ministry of Economics and Transport, No. 93, Cologne, West German publishing house 1954

with Willy Brenschede, E. Jenckel: The physics of high polymers, Volume 3: States of order and transformation phenomena in solid high polymer materials, Springer 1955

with Rolf Hosemann, Günter Schoknecht: Light-optical production and discussion of the folding squares of paracrystalline lattices, research reports from the North Rhine-Westphalia Ministry of Economics and Transport, No. 173, Cologne: West German Publishing House 1956

with Victor Elsaesser: Flow processes in the spinneret and the blue cone of the Cuoxam process, Cologne: Westdeutscher Verlag 1960

Fine structure of non-metallic organic substances, in: Ernst Schmidt (ed.), Landolt-Börnstein, Volume 4, Part 3, Springer 1957

Transformation temperatures of crystalline liquids, in: Klaus Schäfer, Ellen Lax (ed.), Properties of matter in its aggregate states: 2. Part - Steam-condensate equilibria and osmotic phenomena, Landolt-Börnstein, Volume 2, Part 2a, 6. Edition, Springer 1960

Life: Kast came from an old miner's family from the Harz Mountains, grew up in Halle, studied physics at the University of Halle from 1919 and received his doctorate there in 1922 under Julius Herweg with a dissertation on the dielectric constant of liquid crystals. As a post-doctoral student he worked with Gustav Mie at the University of Freiburg and completed his habilitation there in 1924[1] (Habilitation thesis: Investigations into the behavior of the anisotropic melt of para-azoxyanisole in a magnetic field). Afterwards he was a private lecturer there. In 1932/33 he was a Rockefeller fellow with Leonard Ornstein in Utrecht, but had already had contact with Ornstein through his scientific work. In 1937 he became associate professor of physics at the University of Halle and director of