German medical biography stubs

Joseph Igersheimer(1879–1965) was a German born ophthalmologist known for his work on arsphenamine for the treatment of syphilis. A Jew, after escaping the Nazis, While in forced exile from Nazi Germany between 1933 and 1939, Joseph Igersheimer was the architect of modern ophthalmology in Turkey. Earlier he was a pioneer in addressing the impact of syphilis on eyesight. He was the first to use arsphenamine in the treatment of syphilis of the eye and the first to operate on retinal detachment by closing the holes. In 1939 he joined the faculty of Tufts University School of Medicine and became a major contributor to America's ophthalmology..

David Paul von Hansemann (5 September 1858 – 1920) was a German pathologist born in Eupen, east Belgium. He is remembered for his work in the field of oncology, in particular, his concept pertaining to anaplasia of cancer cells.
He studied medicine at the Universities of Berlin, Kiel and Leipzig, and following graduation spent nine years as an assistant to Rudolf Virchow (1821-1902) in Berlin. In 1890 he became habilitated in pathological anatomy, and in 1897 obtained the title of professor. In 1907 he began work as a prosector at Friedrichshain city hospital. During World War I he served as an army pathologist.
His name is associated with "Hansemann macrophages" (also known as "Hansemann cells"), which are large mononuclear cells containing Michaelis-Gutmann bodies that affect the urinary tract or kidney.

Gustav Aschaffenburg (May 23, 1866 – September 2, 1944) was a German psychiatrist born in Zweibrücken.
In 1890 he received his medical doctorate from the University of Strasbourg with a thesis on delirium tremens. Later he worked as an assistant to Emil Kraepelin at the psychiatric university clinic in Heidelberg, with whom he later extensively wrote about Haltlose personality disorder. He then practiced psychiatric medicine at the University of Halle and at the Akademie für praktische Medizin in Cologne (from 1919 the University of Cologne).
In the 1930s Aschaffenburg's academic career at Cologne was terminated by the Nazi edict, Gesetz zur Wiederherstellung des Berufsbeamtentums, and he eventually emigrated to the United States, working as a professor at the Catholic University of America in Washington, D.C., and at Johns Hopkins University in Baltimore.
He wrote about the distinctions between Haltlose and Gemütlose psychopathy.
Aschaffenburg was a pioneer in the fields of criminology and forensic psychiatry. In 1903 he published an early systematic study on the causes of crime titled "Das Verbrechen und seine Bekämpfung", in which he discusses individual-hereditary and social-environmental factors, and also dismisses Cesare Lombroso's idea of the so-called "born criminal". Later the work was translated into English, and published as Crime and it's Repression (1913). It was also translated into Swedish by Olof Kinberg and Julia Kinberg.

Theodor Langhans (28 September 1839 – 22 October 1915) was a German pathologist who was a native of Usingen, Duchy of Nassau.
He studied medicine at the University of Heidelberg, and at the University of Göttingen under Friedrich Gustav Jakob Henle (1809–1885), at Berlin under Rudolf Virchow (1821–1902) and in Würzburg, where he became an assistant to Friedrich Daniel von Recklinghausen (1833–1910). In 1867 he became a lecturer at the University of Marburg, and in 1872 became a full professor of pathology at the University of Giessen, where he succeeded Ludwig Franz Alexander Winther (1812–1871).
From 1872 until 1912, Langhans was a professor of pathological anatomy at the University of Bern, where one of his assistants was surgeon Fritz de Quervain (1868–1940). He also worked with Serafina Schachova on kidney anatomy research using a canine model of induced nephritis.Langhans is remembered for his discovery of multi-nucleated giant cells that are found in granulomatous conditions, and are now referred to as Langhans giant cells.

Franziska Tiburtius (24 January 1843 – 5 May 1927) was a German physician and advocate for women's education.

Josef, Baron von Mering (28 February 1849, in Cologne – 5 January 1908, at Halle an der Saale, Germany) was a German physician.
Working at the University of Strasbourg, Mering was the first person to discover (in conjunction with Oskar Minkowski) that one of the pancreatic functions is the production of insulin, a hormone which controls blood sugar levels.
Mering was curious about the pancreas, a comma shaped organ, situated between the stomach and the small intestine. In an effort to discover its function, he removed the organ from a dog. The dog was then noticed frequently urinating on the floor, although it was house trained. Mering realised that this was a symptom of diabetes and tested the urine, which was found to be high in sugar, confirming his suspicion.
Josef von Mering helped to discover barbiturates, a class of sedative drugs used for insomnia, epilepsy, anxiety, and anesthesia. In 1903, he published observations that barbital (then known as diethyl-barbituric acid) has sedative properties in humans. In 1904, he helped to launch barbital under the brand name Veronal. Veronal was the first commercially available barbiturate sedative in any country. Von Mering collaborated with the chemist Emil Fischer, who was also involved in the discovery of barbital.