Vocation : Science : Biology

Camille Delezenne (10 June 1868 – 7 July 1932) was a French physician and biologist born in Genech, a town in the department of Nord.
He studied medicine in Lille, obtaining his hospital internship in 1890. In 1892 he supported his doctorate with a dissertation on parapneumonic pleurisy. Afterwards he undertook experiments on blood circulation at the Wertheimer laboratory in Lille. During this time period, he also served as mayor of Genech (1893–95).
In 1896 he was appointed associate professor of physiology at the University of Montpellier. At Edouard Hédon's laboratory he conducted systematic investigations of blood coagulation in vertebrates, demonstrating the hepatic origin of antithrombin and describing the blood coagulation system of birds.
In 1900 he relocated to Paris, where he worked as a lecturer in the laboratory of physiological chemistry at the École des hautes etudes. With assistance from Emile Duclaux (1840–1904) and Elie Metchnikoff (1845–1916), he was appointed head of the physiology laboratory at the Pasteur Institute, where his primary focus was research of enzymes, venoms and toxins. In 1902 he demonstrated a link between the action of enterokinase in mobilizing pancreatic digestive enzymes and the phenomena of hemolysis. He also showed that certain microbial cultures, snake venoms, and some plants and poisonous mushrooms have diastases that act on the pancreatic juice in the same way as does enterokinase.
In 1902 Delezenne became a member of the Société de biologie, in 1903 he was co-founder of the Bulletin de l'Institut Pasteur with Amédée Borrel (1867–1936), Félix Mesnil (1868–1938), Gabriel Bertrand (1867–1962), Alexandre Besredka (1870–1940) and Auguste-Charles Marie (1864–1935), and in 1910 became a professor at the Pasteur Institute. In 1912 he was elected as a member of the Académie Nationale de Médecine, and in 1929 became a member of the Assemblée de l'Institut Pasteur.

Pierre Paul Dehérain (19 April 1830 in Paris – 7 December 1902) was a French plant physiologist and agricultural chemist. He was notably the doctoral advisor of the Nobel Prize winner Henri Moissan.
He served as an assistant at the Conservatoire national des arts et métiers in Paris, then at the age of 26, began work as a professor at the Collège Chaptal. He obtained his LSc degree in 1856 under Edmond Frémy. Later on, he taught classes in agricultural chemistry at the agricultural school in Grignon, and in 1880, became a professor of plant physiology at the Muséum d'Histoire Naturelle. In 1887 he was elected a member of the Académie des sciences.As a plant physiologist, he studied the absorption of carbon dioxide by plants and the effect of artificial light, especially ultraviolet rays, on plants. He showed that plants do not absorb only those minerals that are beneficial, as previously thought, but absorb all of them and then use those that they need – so that consumption regulates absorption. He discovered respiration by plant roots and investigated the effect of different minerals on the growth of fruits. He also studied effect of crop rotation on soil quality.
The plant genus Deherainia from the family Theophrastaceae is named after him.

Lucien Louis Daniel (1 November 1856 – 26 December 1940) was a French botanist. He was a professor of applied botany at the University of Rennes. His speciality was grafting.
He is the binomial author of a plant species in the family Rosaceae: Pirocydonia winkleri L.L.Daniel ex Bois, an asexual artificial hybrid. (Revue Horticole. Paris. 1914, n. s. xiv. 27)
In 1904 he was awarded the Veitch Memorial Medal by the Royal Horticultural Society.

Lucien Claude Marie Julien Cuénot (French: [keno]; 21 October 1866 – 7 January 1951) was a French biologist. In the first half of the 20th century, Mendelism was not a popular subject among French biologists. Cuénot defied popular opinion and shirked the “pseudo-sciences” as he called them. Upon the rediscovery of Mendel's work by Correns, De Vries, and Tschermak, Cuénot proved that Mendelism applied to animals as well as plants.

François Louis Henri Coutière (4 March 1869 in Saulzet – 23 August 1952 in Orvilliers) was a French zoologist, who specialized in the field of carcinology (crustaceans).
In 1895 he received his bachelor's degree in natural sciences, and during the following year, obtained his pharmacy degree 1st class. By way of a recommendation from Alphonse Milne-Edwards, he embarked on a zoological mission to the Red Sea in 1897 on behalf of the Muséum d'Histoire Naturelle. In 1899 he was named chef de service under Milne-Edwards in the laboratory of anatomic zoology at the École des hautes études.In 1899 he obtained his doctorate in natural sciences with a dissertation-thesis on the snapping shrimp family Alpheidae, and during the following year began teaching classes in zoology at the École supérieure de Pharmacie in Paris. From 1902 to 1937 he was a full professor of zoology at the school of pharmacy.In 1910 he was appointed president of the Société zoologique de France. The shrimp genera Coutierea and Coutierella (family Palaemonidae) commemorate his name, as do species with the epithet coutierei; e.g. Stenothoe coutieri (Chevreux, 1908).

Marie Jules Constant Robert Courrier ForMemRS (6 October 1895 – 13 March 1986) was a French biologist, and doctor. He was a secretary of the French Academy of Sciences from 1948 to 1986. He was the winner of 1963 CNRS Gold medal, the highest scientific research award in France.

Ernest Saint-Charles Cosson (22 July 1819 – 31 December 1889) was a French botanist born in Paris.
Cosson is known for his botanical research in North Africa, and during his career he participated in eight trips to Algeria. In several of these he was accompanied by Henri-René Le Tourneux de la Perraudière (1831–1861), whom he honoured in the naming of several species and genera (e.g., Perralderia, Galium perralderii). In 1863 he was elected president of the Société botanique de France, and from 1873 to 1889, he was a member of the Académie des sciences.In 1882 Jules Ferry, as Minister of Public Instruction, decided to create a mission to explore the Regency of Tunisia.
The expedition was headed by Cosson and included the botanist Napoléon Doumet-Adanson and other naturalists.
In 1884 a geological section under Georges Rolland was added to the Tunisian Scientific Exploration Mission.
Rolland was assisted by Philippe Thomas from 1885 and by Georges Le Mesle in 1887.With Jacques Nicolas Ernest Germain de Saint-Pierre (1815–1882), Cosson published the influential Atlas de la Flore des Environs de Paris.Botanical specimens collected by Cosson are held in many herbaria around the world, including the National Museum of Natural History, France, Harvard University Herbaria, the herbarium at the Royal Botanic Gardens, Kew, the National Herbarium of Victoria at the Royal Botanic Gardens Victoria, Copenhagen University Botanical Museum, the New York Botanical Garden, and the Komarov Botanical Institute, among others.

Giuseppe Colosi (29 March 1892 – 20 October 1975) was an Italian zoologist. He specialized in the study of crustaceans and mysids in particular.
Colosi was born in Petralia Sottana. From 1920 to 1924, he taught in Turin, and he was the head of the zoological institute of the University of Florence from 1940 to 1962. He died in Florence, aged 83.
Colosi is commemorated in the scientific name of a species of lizard, Chalcides colosii.

Dominique Clos (25 May 1821, Sorèze – 19 August 1908) was a French physician and botanist.
He studied medicine and sciences in Toulouse and Paris, obtaining his medical degree in 1845 and his PhD in natural sciences in 1848. In 1853 he succeeded Alfred Moquin-Tandon as professor of botany at the University of Toulouse, maintaining this position until his retirement in 1889. At Toulouse, he made major contributions to its botanical garden and herbarium. From 1881 to 1908, he was a correspondent-member of the Académie des sciences.
He was the author of numerous works on descriptive botany, plant teratology, phytogeography and agricultural botany. As a taxonomist, he described many species from various plant families. Taxa with the specific epithet of closianus are named in his honor' an example being Astragalus closianus.

Jean-Baptiste "Auguste" Chauveau ForMemRS (23 November 1827 – 4 January 1917) was a French professor and veterinarian.