Vocation : Education : Researcher

Carl von Hess (7 March 1863, in Mainz – 28 June 1923, in Possenhofen) was a German ophthalmologist known for his work in ocular physiology.
He studied medicine at the universities of Heidelberg, Bonn and Strasbourg, then traveled to Prague, where he worked with ophthalmologist Hubert Sattler and physiologist Ewald Hering. In 1891 he obtained his habilitation from the University of Leipzig, and later on, he held professorships at the universities of Marburg (from 1896), Würzburg (from 1900) and Munich (from 1912).He made significant contributions in his studies of refraction and accommodation of the eye. He also conducted research on color vision in the various retinal zones, on the various forms of color blindness, of simultaneous contrast, on afterimages of moving objects and of light-dark adaptation. In addition, he performed comparative physiological studies on light sense and color vision involving animals, in invertebrates as well as vertebrates. Along with Paul Römer, he made the discovery that trachoma is transmissible to monkeys.His name is associated with the "Hess afterimage", defined as a positive afterimage that occurs third in the series of afterimages that are the result of exposure to a brief light stimulus (sequentially, the first afterimage is referred to as a "Hering afterimage", the second as a "Purkinje afterimage"). The Hess afterimage is defined as a physiological illusion. There are also several surgical instruments that are named after him.

Jacques François Édouard Hervieux (4 September 1818 – 31 March 1905) was a French pediatrician and gynecologist born in Louviers.
In 1838 he received his licence ès lettres in Rouen, afterwards obtaining a degree in science in Paris (1841), where he later studied medicine. From 1844 to 1848 he worked as a hospital interne in Paris, followed by many years as a hospital physician. In 1892 he became an officer of the Légion d'Honneur, and in 1896 was appointed president of the Académie Nationale de Médecine. He is buried at Cimetière de Montmartre.
Hervieux is remembered for his systematic research of neonatal jaundice. In 1847 he published a major work on the disease called De l'ictère de nouveau-nés.

Théodore (Nicolas) Gobley (French: [ɡɔblɛ]; 11 May 1811, in Paris – 1 September 1876, in Bagnères-de-Luchon, was the first to isolate and ultimately determine the chemical structure of lecithin, the first identified and characterized member of the phospholipids class. He was also a pioneer researcher in the study and analysis of the chemical components of brain tissues.

Charles-Émile François-Franck (7 May 1849, Paris – 8 September 1921, Paris) was a French physiologist.
From 1871 he served as a hospital intern in Bordeaux, later returning to Paris, where he worked as an assistant to Étienne-Jules Marey in the laboratory of pathophysiology at the Collège de France. In 1885 he was named director of the laboratory, and in 1890, attained the title of professor. Among his assistants at the Collège de France was neuropathologist Gustave Roussy. In 1887 he was elected as a member of the Académie Nationale de Médecine.His research included studies of vasomotor regulation, pulmonary blood flow and investigations involving the cerebral localization of function. He was a pioneer of sympathectomy (interruption of the sympathetic nervous system for relieving pain) and remembered for his usage of cinematography to accurately record body movements.

Adolfo Ferrata (26 April 1880 in Brescia – 9 March 1946) was an Italian pathologist and hematologist.
In 1904 he earned his medical degree from the University of Parma, spending the following years performing scientific research in clinics at Parma, Berlin and Naples. From 1921 to 1924 he was a professor of special medical pathology at the Universities of Messina and Siena, afterwards serving as a professor of clinical medicine at the University of Pavia, a position he kept for the remainder of his career.Among his contributions to medical science are investigations on the structure and embryology of the kidney, research on the morphology of intestinal villi and haematopoietic studies in normal and pathological conditions. In his research of haematopoiesis, Ferrata helped demonstrate the systemic nature of leukemia, leading him to support an hypothesis that elements of the blood (erythrocytes, leukocytes, and blood platelets) all originate from the hemocytoblast, a direct descendant of a mesenchymal cell, which he referred to as an emoistioblasto (hemohistioblast).In 1907 he was the first scientist to show that the complement could be split into two components that were singularly inactive, only regaining their activity when reunited.In 1920 Ferrata founded the journal "Haematologica".

Alexander Ellinger (17 April 1870 in Frankfurt am Main – 26 July 1923 in Frankfurt am Main) was a German chemist and pharmacologist.
From 1887 he studied chemistry at the University of Berlin under August Wilhelm von Hofmann and at the University of Bonn as a pupil of August Kekulé. Afterwards, he studied medicine at the University of Munich, followed by work as an assistant in the institute of pharmacology at the University of Strasbourg. In 1897 he became an assistant to Max Jaffé in the laboratory of medicinal chemistry and experimental pharmacology at the University of Königsberg. In 1914 he was appointed professor of pharmacology at the newly established University of Frankfurt.He is remembered for his extensive biochemical research of several amino acids, especially tryptophan. In 1904 he isolated kynurenic acid from the urine of dogs that had been fed tryptophan. His other work included studies on the water exchange between body tissues and blood, on the formation on lymph, and with chemist Karl Spiro, he conducted investigations of blood coagulation.

Jules Henri Debray (26 July 1827, in Amiens – 19 July 1888, in Paris) was a French chemist.
In 1847 he began his studies at the École Normale Supérieure in Paris, and several years later became an instructor at the Lycée Charlemagne (1855). From 1875 onward, he taught classes in chemistry at the École Normale Supérieure, where in 1881 he succeeded Henri Étienne Sainte-Claire Deville as professor of chemistry.He is best remembered for his collaborative research with Sainte-Claire Deville involving the properties of platinum metals, in particular, the melting of platinum and its alloys. Their process for melting platinum remained the chosen method until induction furnaces became available decades later. In 1860, the two scientists were the first to melt an appreciable quantity of iridium.During his career, Debray served as an assayer for the Bureau de Garantie of Paris, was vice-president of the Société d'Encouragement pour l'Industrie Nationale and was a member of the Académie des sciences.

Anatole Marie Émile Chauffard (22 August 1855 – 1 November 1932) was a French internist born in Avignon.
He earned his doctorate in 1882, and became médecin des hôpitaux. In 1907 he was appointed professor of internal medicine at the Paris faculty. He was a member of the Académie de Médecine, and in 1911 attained the clinical chair at Hôpital Saint-Antoine.
Chauffard is remembered for his work involving liver disease and his pathophysiological research of hereditary spherocytosis. His name is associated with the following disorders:

"Minkowski-Chauffard disease": Congenital hemolytic anemia with spherocytosis, splenomegaly and jaundice. Named with Oskar Minkowski (1858–1931).
"Troisier-Hanot-Chauffard syndrome": Hypertrophic cirrhosis with skin pigmentation and diabetes mellitus. Sometimes called primary hemochromatosis, bronze diabetes, pigmentary cirrhosis or iron overload disease. Named with Victor Charles Hanot (1844–1896) and Charles Emile Troisier (1844–1919).

Étienne Jacques Marie Raymond Céstan (6 April 1872, Gaillac – 1934) was a French neurologist.
From 1892 he studied medicine in Paris, and was subsequently a hospital interne and a student of Édouard Brissaud at the Salpêtrière. In 1899 he received his medical doctorate, and was chosen by Fulgence Raymond to be chef de clinique at the Salpêtrière. In 1903 he was put in charge of the histopathology laboratory, and during the following year, he obtained his agrégation. Soon afterwards, he moved to Toulouse, where in 1913 he attained the chair of psychiatry. At this position he conducted research on the development of cerebrospinal fluid and the effects of intra-ventricular injection.

Giorgio Celli (16 July 1935 – 11 June 2011) was an Italian entomologist, ecologist, professor, writer, and politician.