Scientists from Berlin

Walther Kruse (September 8, 1864 – 1943) was a German bacteriologist who was a native of Berlin.
In 1888 he received his doctorate from Berlin, where he was a student of Rudolf Virchow (1821–1902). From 1889 until 1892 he worked as a bacteriologist in Naples, and in 1892 travelled to Egypt to perform research on dysentery. In 1893 he became an assistant to hygienist Carl Flügge (1847–1923) in Breslau, and in 1898 became an associate professor at the University of Bonn. Later he served as a full professor in Königsberg (1900), Bonn (1911) and Leipzig (1913).
Walther Kruse is remembered for his work in parasitology and his research of intestinal bacteria infections. He performed extensive studies of Shigella dysenteriae during an epidemic of dysentery in the Ruhr area of Germany. This organism is sometimes referred to as the "Shiga–Kruse bacillus", and its associated disease as "Shiga–Kruse dysentery". These eponyms are shared with Japanese bacteriologist Kiyoshi Shiga (1871–1957). Kruse documented his findings in a 1900 treatise titled Über die Ruhr als Volkskrankheit und ihren Erreger.
In 1914 he demonstrated that the common cold could be transmitted to healthy individuals via nasal secretions that were free of bacteria. The results of these experiments were published in a treatise called Die Erreger von Husten und Schnupfen (1914). A specialized tool used to spread material over the surface of a culture medium is called "Kruse's brush".

Theodore Samuel Motzkin (26 March 1908 – 15 December 1970) was an Israeli-American mathematician.

Paul Thieme (German: [paʊl ˈtiːmə]; 18 March 1905 – 24 April 2001) was a German Indologist and scholar of Vedic Sanskrit. In 1988 he was awarded the Kyoto Prize in Arts and Philosophy for "he added immensely to our knowledge of Vedic and other classical Indian literature and provided a solid foundation to the study of the history of Indian thought".

Käte Fenchel née Käte Sperling (21 December 1905 – 19 December 1983) was a German-born Jewish mathematician, best known for her work on non-abelian groups.

Ernst Ludwig Bresslau (10 July 1877, Berlin – 9 May 1935, São Paulo) was a German zoologist. He was the son of historian Harry Bresslau.

Alfred Oppenheim (3 November 1878 in Berlin – 14 May 1943 in Berlin) was a German chemist and gas mantle manufacturer.

Reinhold Strassmann (or Straßmann) (24 January 1893 in Berlin – late October 1944 in Auschwitz concentration camp) was a German mathematician who proved Strassmann's theorem. His Ph.D. advisor at University of Marburg was Kurt Hensel.
Born into a Jewish family, Strassmann refused to leave Nazi Germany, and he was eventually detained and deported to Theresienstadt concentration camp in 1943. On October 23, 1944, he was deported from Theresienstadt to Auschwitz concentration camp, where he was murdered soon after.He was the son of the forensic pathologist Fritz Strassmann.

Rudolf Schoenheimer (May 10, 1898 – September 11, 1941) was a German-American biochemist who developed the technique of isotope labelling/tagging of biomolecules, enabling detailed study of metabolism. This work revealed that all the constituents of an organism are in a constant state of chemical renewal.Born in Berlin, after graduating in medicine from the Friedrich Wilhelm University there, he learned further organic chemistry at the University of Leipzig and then studied biochemistry at the University of Freiburg where he rose to be Head of Physiological Chemistry.He spent the 1930-31 academic year at the University of Chicago.In 1933, following the rise of the Nazis to power he emigrated from Germany to the Columbia University to join the department of Biological Chemistry. Working with David Rittenberg, from the radiochemistry laboratory of Harold C. Urey and later together with Konrad Bloch, they used stable isotopes to tag foodstuffs and trace their metabolism within living things.He further established that cholesterol is a risk factor in atherosclerosis.He suffered from manic depression all of his life, which led to him in 1941 committing suicide using cyanide. He had been honoured with the request to give the Dunham Lecture at Harvard before his death. It was read for him following his death.

Karl Wilhelm Louis Rosenmund (15 December 1884 – 8 February 1965) was a German chemist. He was born in Berlin and died in Kiel.
Rosenmund studied chemistry and received his Ph.D. 1906 from University of Berlin for his work with Otto Diels. He discovered the Rosenmund reduction, which is the reduction of acid chlorides to aldehydes over palladium on barium sulfate as catalyst (Lindlar catalyst). The Rosenmund–von Braun reaction, the conversion of an aryl bromide to an aryl nitrile is also named after him. Rosenmund-Kuhnhenn method is suitable for the determination of iodine value in conjugated systems (ASTM D1541).

Robert Erich Remak (14 February 1888 – 13 November 1942) was a German mathematician. He is chiefly remembered for his work in group theory (Remak decomposition). His other interests included algebraic number theory, mathematical economics and geometry of numbers. Robert Remak was the son of the neurologist Ernst Julius Remak and the grandson of the embryologist Robert Remak. He was murdered in the Holocaust.