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Pol Bouin
Pol André Bouin (11 June 1870 – 5 February 1962) was a French histologist and reproductive endocrinologist. He is best known for the fixative Bouin solution named after him. Bouin was born in Vendresse, France into a family of veterinarians. He studied medicine at Nancy and was influenced by Auguste Prenant. He received a doctor of medicine degree in 1897. He worked as a histology preparator and later became a professor of anatomy in 1898. He succeeded Professor Prenant in the chair of histology at Nancy in 1908. Throughout his career, he conducted numerous experiments, particularly in the field of reproductive endocrinology. In 1929 he demonstrated that lactation could be induced in rabbits without ovaries by administering anterior pituitary extract at a time when prolactin Prolactin (PRL), also known as lactotropin and mammotropin, is a protein best known for its role in enabling mammals to produce milk. It is influential in over 300 separate processes in various verte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bouin Solution
Bouin solution, or Bouin's solution, is a compound fixative used in histology. It was invented by French biologist Pol Bouin and is composed of picric acid, acetic acid and formaldehyde in an aqueous solution. Bouin's fluid is especially useful for fixation of gastrointestinal tract biopsies because this fixative allows crisper and better nuclear staining than 10% neutral-buffered formalin. It is not a good fixative when tissue ultrastructure must be preserved for electron microscopy. However, it is a good fixative when tissue structure with a soft and delicate texture must be preserved. The acetic acid in this fixative lyses red blood cells and dissolves small iron and calcium deposits in tissue. A variant in which the acetic acid is replaced with formic acid can be used for both fixation of tissue and decalcification. The effects of the three chemicals in Bouin solution balance each other. Formalin causes cytoplasm to become basophilic but this effect is balanced by the effect o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vendresse
Vendresse () is a commune in the Ardennes department and Grand Est region of north-eastern France. Population The inhabitants of Vendresse are known as ''Vendressois'' in French. Sights * Arboretum de Vendresse See also *Communes of the Ardennes department *Jambon sec des Ardennes The Jambon sec des Ardennes (lit. French for Ardennes dry-cured ham) is the collective certification mark for dry-cured hams from the France, French department of the Ardennes (department), Ardennes, made from pigs' legs purchased from local farmer ... References Communes of Ardennes (department) Ardennes communes articles needing translation from French Wikipedia {{Ardennes-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auguste Prenant
Louis César Auguste Prenant (5 November 1861 – 28 September 1927) was a French histologist and professor of medicine at Nancy, France, Nancy. He coauthored an influential textbook of histology ''Traité d'histologie'' and developed a histology laboratory at Nancy. Life and work Prenant was born in Lyon (Rhône) son of army officer Louis Théophile. He studied natural sciences in 1882 and became a doctor of medicine in 1887. He became an assistant in natural history in 1883 at Nancy and began to head histology from 1886. He became a professor of histology in 1894 at Nancy succeeding Leon Baraban. In 1907 he moved to the faculty of medicine in Paris. His major work was on comparative embryology made in collaboration with Pol Bouin and Louis Camille Maillard. He studied the origin and development of gills, the notochord, eyes and endocrine organs. He also studied spermatogenesis in mammals. Prenant suggested in 1898 that the corpus luteum had a secretory function but he was not ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prolactin
Prolactin (PRL), also known as lactotropin and mammotropin, is a protein best known for its role in enabling mammals to produce milk. It is influential in over 300 separate processes in various vertebrates, including humans. Prolactin is secreted from the pituitary gland in response to eating, mating, estrogen treatment, ovulation and nursing. It is secreted heavily in pulses in between these events. Prolactin plays an essential role in metabolism, regulation of the immune system and pancreatic development. Discovered in non-human animals around 1930 by Oscar Riddle and confirmed in humans in 1970 by Henry Friesen, prolactin is a peptide hormone, encoded by the ''PRL'' gene. In mammals, prolactin is associated with milk production; in fish it is thought to be related to the control of water and salt balance. Prolactin also acts in a cytokine-like manner and as an important regulator of the immune system. It has important cell cycle-related functions as a growth-, diffe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1870 Births
Events January * January 1 ** The first edition of ''The Northern Echo'' newspaper is published in Priestgate, Darlington, England. ** Plans for the Brooklyn Bridge are completed. * January 3 – Construction of the Brooklyn Bridge begins in New York City. * January 6 – The ''Musikverein'', Vienna, is inaugurated in Austria-Hungary. * January 10 – John D. Rockefeller incorporates Standard Oil. * January 15 – A political cartoon for the first time symbolizes the United States Democratic Party with a donkey (''A Live Jackass Kicking a Dead Lion'' by Thomas Nast for ''Harper's Weekly''). * January 23 – Marias Massacre: U.S. soldiers attack a peaceful camp of Piegan Blackfeet Indians, led by chief Heavy Runner. * January 26 – Reconstruction Era (United States): Virginia rejoins the Union. This year it adopts a Constitution of Virginia#1870, new Constitution, drawn up by John Curtiss Underwood, expanding suffrage to all male citizens over 21, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1962 Deaths
The year saw the Cuban Missile Crisis, which is often considered the closest the world came to a Nuclear warfare, nuclear confrontation during the Cold War. Events January * January 1 – Samoa, Western Samoa becomes independent from New Zealand. * January 3 – The office of Pope John XXIII announces the excommunication of Fidel Castro for preaching communism and interfering with Catholic churches in Cuba. * January 8 – Harmelen train disaster: 93 die in the worst Netherlands, Dutch rail disaster. * January 9 – Cuba and the Soviet Union sign a trade pact. * January 12 – The Indonesian Army confirms that it has begun operations in West Irian. * January 13 – People's Socialist Republic of Albania, Albania allies itself with the People's Republic of China. * January 15 ** Portugal abandons the United Nations General Assembly due to the debate over Angola. ** French designer Yves Saint Laurent (designer), Yves Saint Laurent launches Yves Saint Lau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
