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Traugott Sandmeyer
Traugott Sandmeyer (15 September 1854 – 9 April 1922) was a Switzerland, Swiss chemist after whom the Sandmeyer reaction, which he discovered 1884, was named. Life Sandmeyer was born as the last of seven children and attended school in Aarau, studying to become a precision mechanic. His friend, J. Gustav Schmidt, studied chemistry at the ETH Zurich, Polytechnikum of Zurich (ETH), and their cooperation in conducting experiments led to Sandmeyer's close contact with chemistry. In 1882 Sandmeyer was made a chemistry lecturer at the ETH by Viktor Meyer. Meyer and Sandmeyer collaborated in studying the synthesis of thiophene, which Meyer had discovered earlier. When Meyer moved to the University of Göttingen, Sandmeyer followed, but then returned to Zürich after a year to work with Arthur Rudolf Hantzsch. Sandmeyer began his career in industry in 1888 with Johann Rudolf Geigy-Merian, who was the owner of the chemical factory J. R. Geigy & Cie (later Ciba Geigy, now Novarti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wettingen
Wettingen is a residential community in the district of Baden in the Swiss canton of Aargau. With a population about 20,000, Wettingen is the second-largest municipality in the canton. Geography Wettingen is located on the right bank of the Limmat, located in the Limmat Valley (German: ''Limmattal''), before the deep valley in Baden. Most of the town is located on the Wettingerfeld (Wettinger Field), which is a flat plain surrounded on all sides by natural borders: to the south and west by the Limmat, to the north by the steep southern slope of the Lägern, and to the East by the Sulperg (). A vineyard is located on a section of the Lägern’s slope. Between the Lägern and the Sulperg is the undeveloped Eigital (Eigi valley). At the Eigital’s west end, in the northeastern section of the Wettingerfeld, is the relatively well-maintained old village center. A small creek flows through the Wettingerfeld and empties into the Limmat at the ''Gottesgraben''. The stream is partially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thiophene
Thiophene is a heterocyclic compound with the formula C4H4S. Consisting of a planar five-membered ring, it is aromatic as indicated by its extensive substitution reactions. It is a colorless liquid with a benzene-like odor. In most of its reactions, it resembles benzene. Compounds analogous to thiophene include furan (C4H4O), selenophene (C4H4Se) and pyrrole (C4H4NH), which each vary by the heteroatom in the ring. Isolation and occurrence Thiophene was discovered as a contaminant in benzene. It was observed that isatin (an indole) forms a blue dye if it is mixed with sulfuric acid and crude benzene. The formation of the blue indophenin had long been believed to be a reaction of benzene itself. Viktor Meyer was able to isolate thiophene as the actual substance responsible for this reaction. Thiophene and especially its derivatives occur in petroleum, sometimes in concentrations up to 1–3%. The thiophenic content of oil and coal is removed via the hydrodesulfurization (HDS) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Engineers
A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances (substances consisting of a single chemical element), chemical compounds, or alloys. Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt ( sodium chloride) and refined sugar ( sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical. Chemical substances exist as solids, liqu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swiss Chemists
Swiss may refer to: * the adjectival form of Switzerland *Swiss people Places *Swiss, Missouri * Swiss, North Carolina *Swiss, West Virginia *Swiss, Wisconsin Other uses *Swiss-system tournament, in various games and sports *Swiss International Air Lines **Swiss Global Air Lines, a subsidiary *Swissair, former national air line of Switzerland *.swiss alternative TLD for Switzerland See also *Swiss made, label for Swiss products *Swiss cheese (other) *Switzerland (other) *Languages of Switzerland, none of which are called "Swiss" *International Typographic Style, also known as Swiss Style, in graphic design *Schweizer (other), meaning Swiss in German *Schweitzer, a family name meaning Swiss in German *Swisse Swisse is a vitamin, supplement, and skincare brand. Founded in Australia in 1969 and globally headquartered in Melbourne, and was sold to Health & Happiness, a Chinese company based in Hong Kong previously known as Biostime International, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helvetica Chimica Acta
''Helvetica Chimica Acta'' is a peer-reviewed scientific journal of chemistry established by the Swiss Chemical Society. It is published online by John Wiley & Sons. The journal has a 2020 impact factor of 2.164. History *August 6, 1901: Founding of the Swiss Chemical Society *1911: IUPAC refused SCG as a member, no own journal *September 11, 1917: SCG founded HCA *1917–1948: First editor-in-chief An editor-in-chief (EIC), also known as lead editor or chief editor, is a publication's editorial leader who has final responsibility for its operations and policies. The highest-ranking editor of a publication may also be titled editor, managing ...: Friedrich Fichter (1869–1952) *Spring 1918: Fasciculus I of Volume I of HCA was issued *1948–1971: Emile Cherbuliez (1891–1985) *1970: English allowed as fourth language *1971–1983: Edgardo Giovannini (1909–2004) *1983–2015: M. Volkan Kisakürek *2015-2016: Richard J. Smith *2016–2021: Jeffrey W. Bode and Christophe Copére ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isatin
Isatin, also known as tribulin, is an organic compound derived from indole with formula C8H5NO2. The compound was first obtained by Otto Linné Erdman and Auguste Laurent in 1840 as a product from the oxidation of indigo dye by nitric acid and chromic acids. Isatin is a well-known natural product which can be found in plants of the genus ''Isatis'', in ''Couroupita guianensis'', and also in humans, as a metabolic derivative of adrenaline. It looks like a red-orange powder, and it is usually employed as building block for the synthesis of a wide variety of biologically active compounds including antitumorals, antivirals, anti-HIVs, and antituberculars. The isatin core is also responsible for the color of “Maya blue” and “Maya yellow” dyes. Synthesis Sandmeyer methodology The Sandmeyer methodology is the oldest and straightforward way for the synthesis of isatin. The method involves the condensation between chloral hydrate and a primary arylamine (e.g. anili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indigo Dye
Indigo dye is an organic compound with a distinctive blue color. Historically, indigo was a natural dye extracted from the leaves of some plants of the ''Indigofera'' genus, in particular ''Indigofera tinctoria''; dye-bearing ''Indigofera'' plants were commonly grown and used throughout the world, in Asia in particular, as an important crop, with the production of indigo dyestuff economically important due to the previous rarity of some blue dyestuffs historically. Most indigo dye produced today is synthetic, constituting several thousand tons each year. It is most commonly associated with the production of denim cloth and blue jeans, where its properties allow for effects such as stone washing and acid washing to be applied quickly. Uses The primary use for indigo is as a dye for cotton yarn, mainly used in the production of denim cloth suitable for blue jeans; on average, a pair of blue jeans requires just to of dye. Smaller quantities are used in the dyeing of wool and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Novartis
Novartis AG is a Swiss-American multinational pharmaceutical corporation based in Basel, Switzerland and Cambridge, Massachusetts, United States (global research).name="novartis.com">https://www.novartis.com/research-development/research-locations It is one of the largest pharmaceutical companies in the world. Novartis manufactures the drugs clozapine (Clozaril), diclofenac (Voltaren; sold to GlaxoSmithKline in 2015 deal), carbamazepine (Tegretol), valsartan (Diovan), imatinib mesylate (Gleevec/Glivec), cyclosporine (Neoral/Sandimmune), letrozole (Femara), methylphenidate (Ritalin; production ceased 2020), terbinafine (Lamisil), deferasirox (Exjade), and others. In March 1996, the companies Ciba-Geigy and Sandoz merged to form Novartis; the pharmaceutical and agrochemical divisions of both companies formed Novartis as an independent entity. Other Ciba-Geigy and Sandoz businesses were sold, or, like Ciba Specialty Chemicals, spun off as independent companies. The Sandoz brand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ciba Geigy
Novartis AG is a Swiss-American multinational pharmaceutical corporation based in Basel, Switzerland and Cambridge, Massachusetts, United States (global research).name="novartis.com">https://www.novartis.com/research-development/research-locations It is one of the largest pharmaceutical companies in the world. Novartis manufactures the drugs clozapine (Clozaril), diclofenac (Voltaren; sold to GlaxoSmithKline in 2015 deal), carbamazepine (Tegretol), valsartan (Diovan), imatinib mesylate (Gleevec/Glivec), cyclosporine (Neoral/Sandimmune), letrozole (Femara), methylphenidate (Ritalin; production ceased 2020), terbinafine (Lamisil), deferasirox (Exjade), and others. In March 1996, the companies Ciba-Geigy and Sandoz merged to form Novartis; the pharmaceutical and agrochemical divisions of both companies formed Novartis as an independent entity. Other Ciba-Geigy and Sandoz businesses were sold, or, like Ciba Specialty Chemicals, spun off as independent companies. The Sandoz brand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Rudolf Geigy-Merian
Johann, typically a male given name, is the German form of ''Iohannes'', which is the Latin form of the Greek name ''Iōánnēs'' (), itself derived from Hebrew name ''Yochanan'' () in turn from its extended form (), meaning "Yahweh is Gracious" or "Yahweh is Merciful". Its English language equivalent is John. It is uncommon as a surname. People People with the name Johann include: Mononym *Johann, Count of Cleves (died 1368), nobleman of the Holy Roman Empire *Johann, Count of Leiningen-Dagsburg-Falkenburg (1662–1698), German nobleman *Johann, Prince of Hohenzollern-Sigmaringen (1578–1638), German nobleman A–K * Johann Adam Hiller (1728–1804), German composer * Johann Adam Reincken (1643–1722), Dutch/German organist * Johann Adam Remele (died 1740), German court painter * Johann Adolf I, Duke of Saxe-Weissenfels (1649–1697) * Johann Adolph Hasse (1699-1783), German Composer * Johann Altfuldisch (1911—1947), German Nazi SS concentration camp officer executed for wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aarau
Aarau (, ) is a List of towns in Switzerland, town, a Municipalities of Switzerland, municipality, and the capital of the northern Swiss Cantons of Switzerland, canton of Aargau. The List of towns in Switzerland, town is also the capital of the district of Aarau (district), Aarau. It is German-speaking and predominantly Protestant. Aarau is situated on the Swiss plateau, in the valley of the Aare, on the river's right bank, and at the southern foot of the Jura Mountains, and is west of Zürich, south of Basel and northeast of Bern. The municipality borders directly on the canton of Solothurn to the west. It is the largest town in Aargau. At the beginning of 2010 Rohr, Aargau, Rohr became a district of Aarau. The official language of Aarau is (the Swiss variety of Standard) Swiss Standard German, German, but the main spoken language is the local variant of the Alemannic German, Alemannic Swiss German (linguistics), Swiss German dialect. Geography and geology The old city of Aarau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switzerland
). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel, St. Gallen a.o.). , coordinates = , largest_city = Zürich , official_languages = , englishmotto = "One for all, all for one" , religion_year = 2020 , religion_ref = , religion = , demonym = , german: Schweizer/Schweizerin, french: Suisse/Suissesse, it, svizzero/svizzera or , rm, Svizzer/Svizra , government_type = Federalism, Federal assembly-independent Directorial system, directorial republic with elements of a direct democracy , leader_title1 = Federal Council (Switzerland), Federal Council , leader_name1 = , leader_title2 = , leader_name2 = Walter Thurnherr , legislature = Fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
