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Georges-Simon Serullas
Georges-Simon Serullas (2 November 1774 in Poncin – 25 May 1832 in Paris) was a French pharmacist. He was a professor of pharmacy notable for being the first to publish a work on Iodoform, an early antiseptic and disinfectant. Biography He was a professor and head pharmacist at the hospital of Val-de-Grâce; professor of chemistry at the Jardin des Plantes (the chief botanical garden in France), and member of the French Academy of Sciences (elected December 28, 1829 - Chemistry section). He was one of the first researchers to draw attention to the haloform reaction. In 1822, Serullas added potassium metal to a solution of iodine in ethanol and water to form potassium formate and iodoform, called in the language of that time ''hydroiodide of carbon'', and used as an antiseptic. He is buried in the Père Lachaise Cemetery Père Lachaise Cemetery (, , formerly , ) is the largest cemetery in Paris, France, at . With more than 3.5 million visitors annually, it is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georges Simon Serullas
Georges may refer to: Places *Georges River, New South Wales, Australia *Georges Quay (Dublin) *Georges Township, Fayette County, Pennsylvania Other uses *Georges (name) * ''Georges'' (novel), a novel by Alexandre Dumas * "Georges" (song), a 1977 song originally recorded by Pat Simon and covered by Sylvie Vartan *Georges (store), a department store in Melbourne, Australia from 1880 to 1995 * Georges (''Green Card'' character) People with the surname *Eugenia Georges, American anthropologist *Karl Ernst Georges (1806–1895), German classical philologist and lexicographer, known for his edition of Latin-German dictionaries. *Mary Ngwanda Georges, Congo-born American politician See also * École secondaire Georges-P.-Vanier, a high school in Hamilton, Ontario, Canada *École secondaire Georges-Vanier in Laval, Quebec, Canada * French cruiser ''Georges Leygues'', commissioned in 1937 * French frigate ''Georges Leygues'' (D640), commissioned in 1979 *Georges Krayem, Brazilian lawyer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haloform Reaction
In chemistry, the haloform reaction (also referred to as the Lieben haloform reaction) is a chemical reaction in which a haloform (, where X is a halogen) is produced by the exhaustive halogenation of an acetyl group (, where R can be either a hydrogen atom, an alkyl or an aryl group), in the presence of a base. The reaction can be used to transform acetyl groups into carboxyl groups () or to produce chloroform (), bromoform (), or iodoform (). Note that fluoroform () can't be prepared in this way. Mechanism In the first step, the halogen dis-proportionates in the presence of hydroxide to give the halide and hypohalite. :Br2 + 2 OH- -> Br- + BrO- + H2O If a secondary alcohol is present, it is oxidized to a ketone by the hypohalite: If a methyl ketone is present, it reacts with the hypohalite in a three-step process: 1. Under basic conditions, the ketone undergoes keto-enol tautomerisation. The enolate undergoes electrophilic attack by the hypohalite (containing a halo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1832 Deaths
Events January–March * January 6 – Abolitionist William Lloyd Garrison founds the New-England Anti-Slavery Society. * January 13 – The Christmas Rebellion of slaves is brought to an end in Jamaica, after the island's white planters organize militias and the British Army sends companies of the 84th regiment to enforce martial law. More than 300 of the slave rebels will be publicly hanged for their part in the destruction. * February 6 – The Swan River Colony is renamed Western Australia. * February 9 – The Florida Legislative Council grants a city charter for Jacksonville, Florida. * February 12 ** Ecuador annexes the Galápagos Islands. ** A cholera epidemic in London claims at least 3,000 lives; the contagion spreads to France and North America later this year. * February 28 – Charles Darwin and the crew of arrive at South America for the first time. * March 24 – In Hiram, Ohio, a group of men beat, tar and feather Mormon leader Joseph Smith. Apri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1774 Births
Events January–March * January 21 – Mustafa III, Sultan of the Ottoman Empire, dies and is succeeded by his brother Abdul Hamid I. * January 27 ** An angry crowd in Boston, Massachusetts seizes, tars, and feathers British customs collector and Loyalist John Malcolm, for striking a boy and a shoemaker, George Hewes, with his cane. ** British industrialist John Wilkinson patents a method for boring cannon from the solid, subsequently utilised for accurate boring of steam engine cylinders. * February 3 – The Privy Council of Great Britain, as advisors to King George III, votes for the King's abolition of free land grants of North American lands. Henceforward, land is to be sold at auction to the highest bidder. * February 6 – The Parlement of Paris votes a sentence of civil degradation, depriving Pierre Beaumarchais of all rights and duties of citizenship. * February 7 – The volunteer fire company of Trenton, New Jersey, predecessor to the paid Trenton Fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Père Lachaise Cemetery
Père Lachaise Cemetery (, , formerly , ) is the largest cemetery in Paris, France, at . With more than 3.5 million visitors annually, it is the most visited necropolis in the world. Buried at Père Lachaise are many famous figures in the arts, including Miguel Ángel Asturias, Honoré de Balzac, Sarah Bernhardt, Georges Bizet, Frédéric Chopin, Colette, George Enescu, Max Ernst, Olivia de Havilland, Marcel Marceau, Georges Méliès, Amedeo Modigliani, Molière, Édith Piaf, Camille Pissarro, Marcel Proust, Gertrude Stein, Oscar Wilde, Richard Wright (author), Richard Wright, Sadegh Hedayat, Jim Morrison, and Michel Petrucciani. Many famous philosophers, scientists, and historical figures are buried there as well, including Peter Abelard, Pierre Bourdieu, Jean-François Champollion, Auguste Comte, Georges Cuvier, Joseph Fourier, Manuel Godoy, Georges-Eugène Haussmann, Jean-François Lyotard, Nestor Makhno, Maurice Merleau-Ponty, Jean Moulin, Henri de Saint-Simon, Jean-Bap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iodoform
Iodoform (also known as triiodomethane) is the organoiodine compound with the chemical formula . It is a pale yellow, crystalline, volatile substance, with a penetrating and distinctive odor (in older chemistry texts, the smell is sometimes referred to as that of hospitals, where the compound is still commonly used) and, analogous to chloroform, sweetish taste. It is occasionally used as a disinfectant. Naming The name iodoform originates with the "formyle radical," an archaic term for the HC moiety, and is retained for historical consistency. A full, modern name is triiodomethane. Another possible name is "carbon hydride triiodide". The "hydride" in the latter is sometimes omitted, though the IUPAC recommends against doing so, as "carbon triiodide" could also mean (hexaiodoethane, a highly unstable compound). Structure The molecule adopts a tetrahedral molecular geometry, tetrahedral geometry with C3v symmetry group, symmetry. Synthesis and reactions The synthesis of iodofo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethanol
Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula . It is an Alcohol (chemistry), alcohol, with its formula also written as , or EtOH, where Et is the pseudoelement symbol for ethyl group, ethyl. Ethanol is a Volatility (chemistry), volatile, flammable, colorless liquid with a characteristic wine-like odor and pungent taste. As a psychoactive depressant, it is the active ingredient in alcoholic beverages, and the second most consumed drug globally behind caffeine. Ethanol is naturally produced by the fermentation process of sugars by yeasts or via petrochemical processes such as ethylene hydration. Historically it was used as a general anesthetic, and has modern medical applications as an antiseptic, disinfectant, solvent for some medications, and antidote for methanol poisoning and ethylene glycol poisoning. It is used as a chemical solvent and in the Chemical synthesis, synthesis of orga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iodine
Iodine is a chemical element; it has symbol I and atomic number 53. The heaviest of the stable halogens, it exists at standard conditions as a semi-lustrous, non-metallic solid that melts to form a deep violet liquid at , and boils to a violet gas at . The element was discovered by the French chemist Bernard Courtois in 1811 and was named two years later by Joseph Louis Gay-Lussac, after the Ancient Greek , meaning 'violet'. Iodine occurs in many oxidation states, including iodide (I−), iodate (), and the various periodate anions. As the heaviest essential mineral nutrient, iodine is required for the synthesis of thyroid hormones. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities. The dominant producers of iodine today are Chile and Japan. Due to its high atomic number and ease of attachment to organic compounds, it has also found favour as a non-toxic radiocontrast material. Because of the spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Academy Of Sciences
The French Academy of Sciences (, ) is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French Scientific method, scientific research. It was at the forefront of scientific developments in Europe in the 17th and 18th centuries, and is one of the earliest Academy of Sciences, Academies of Sciences. Currently headed by Patrick Flandrin (President of the academy), it is one of the five Academies of the . __TOC__ History The Academy of Sciences traces its origin to Colbert's plan to create a general academy. He chose a small group of scholars who met on 22 December 1666 in the King's library, near the present-day Bibliothèque nationale de France, Bibliothèque Nationale, and thereafter held twice-weekly working meetings there in the two rooms assigned to the group. The first 30 years of the academy's existence were relatively informal, since no statutes had as yet been laid down for the ins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poncin
Poncin () is a commune in the Ain department in eastern France. It lies on the banks of the river Ain. History Of strategic importance during medieval times, Poncin is surrounded by city walls that are still in perfect shape despite their age. The village was originally intended to receive the same patronage as Pérouges but the plan never reached fruition. Population See also *Communes of the Ain department The following is a list of the 391 communes of the Ain department of France. The communes cooperate in the following intercommunalities (as of 2025):Communes of Ain Ain communes articles needing translation f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botanical Garden
A botanical garden or botanic gardenThe terms ''botanic'' and ''botanical'' and ''garden'' or ''gardens'' are used more-or-less interchangeably, although the word ''botanic'' is generally reserved for the earlier, more traditional gardens. is a garden with a documented collection of living plants for the purpose of scientific research, conservation, display, and education. It is their mandate as a botanical garden that plants are labelled with their botanical names. It may contain specialist plant collections such as cactus, cacti and other succulent plants, herb gardens, plants from particular parts of the world, and so on; there may be greenhouse, glasshouses or shadehouses, again with special collections such as tropical plants, alpine plants, or other exotic plants that are not native to that region. Most are at least partly open to the public, and may offer guided tours, public programming such as workshops, courses, educational displays, art exhibitions, book rooms, op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
