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Rudolf Nietzki
Rudolf Hugo Nietzki (9 March 1847 – 28 September 1917) was a German chemist who specialized in industrial dyes derived from coal tar. While a professor at the University of Basel in Switzerland he initiated the university's association with to the local chemical industry. Life Rudolf Hugo Nietzki was born on 9 March 1847 in Heilsberg, East Prussia (now Lidzbark Warmiński, Poland) to a Protestant family. His father was Carl Johann Emil Nietzki, a priest, rector and writer. He attended the Königsberg gymnasium (secondary school), which he left before graduating, then began training as a pharmacist. He studied pharmacy in Zinten (now Kornevo, Kaliningrad, Russia) and Kreuzburg, Silesia (now Kluczbork, Poland). In 1865 he qualified as an assistant. He worked as a pharmacist in Hirschberg, Silesia, where he met Paul Ehrlich, who later invented chemotherapy. Nietzki attended the University of Berlin from 1867 to 1870, where he studied pharmacy. He served as a military pharmacist dur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lidzbark Warmiński
Lidzbark Warmiński (; german: Heilsberg, ), often shortened to Lidzbark, is a historical town located within the Warmian-Masurian Voivodeship, in northern Poland. It is the capital of Lidzbark County. Lidzbark Warmiński was once the capital of Warmia and formerly its largest town. Lidzbark itself was a religious and cultural center, for which it was known as the ''Pearl of Warmia''. For a long period of time it was under the control of the Warmian Bishops and it was also a major economic center, only resigning its importance to the nearby city of Braniewo. The Warmian Bishop's Castle is considered to be a great artistic and historical value in the world and has been recognised as a Historic Monument by the Polish government. History The town was originally a settlement of Old Prussians known as ''Lecbarg'' until being conquered in 1240 by the Teutonic Knights, who named it Heilsberg. In 1306 it became the seat for the Bishopric of Warmia, and remained the Prince-Bishop' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basel
, french: link=no, Bâlois(e), it, Basilese , neighboring_municipalities= Allschwil (BL), Hégenheim (FR-68), Binningen (BL), Birsfelden (BL), Bottmingen (BL), Huningue (FR-68), Münchenstein (BL), Muttenz (BL), Reinach (BL), Riehen (BS), Saint-Louis (FR-68), Weil am Rhein (DE-BW) , twintowns = Shanghai, Miami Beach , website = www.bs.ch Basel ( , ), also known as Basle ( ),french: Bâle ; it, Basilea ; rm, label= Sutsilvan, Basileia; other rm, Basilea . is a city in northwestern Switzerland on the river Rhine. Basel is Switzerland's third-most-populous city (after Zürich and Geneva) with about 175,000 inhabitants. The official language of Basel is (the Swiss variety of Standard) German, but the main spoken language is the local Basel German dialect. Basel is commonly considered to be the cultural capital of Switzerland and the city is famous for its many museums, including the Kunstmuseum, which is the first collection of art accessibl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1917 Deaths
Events Below, the events of World War I have the "WWI" prefix. January * January 9 – WWI – Battle of Rafa: The last substantial Ottoman Army garrison on the Sinai Peninsula is captured by the Egyptian Expeditionary Force's Desert Column. * January 10 – Imperial Trans-Antarctic Expedition: Seven survivors of the Ross Sea party were rescued after being stranded for several months. * January 11 – Unknown saboteurs set off the Kingsland Explosion at Kingsland (modern-day Lyndhurst, New Jersey), one of the events leading to United States involvement in WWI. * January 16 – The Danish West Indies is sold to the United States for $25 million. * January 22 – WWI: United States President Woodrow Wilson calls for "peace without victory" in Germany. * January 25 ** WWI: British armed merchantman is sunk by mines off Lough Swilly (Ireland), with the loss of 354 of the 475 aboard. ** An anti-prostitution drive in San Francisco occurs, and police ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1847 Births
Events January–March * January 4 – Samuel Colt sells his first revolver pistol to the U.S. government. * January 13 – The Treaty of Cahuenga ends fighting in the Mexican–American War in California. * January 16 – John C. Frémont is appointed Governor of the new California Territory. * January 17 – St. Anthony Hall fraternity is founded at Columbia University, New York City. * January 30 – Yerba Buena, California, is renamed San Francisco. * February 5 – A rescue effort, called the First Relief, leaves Johnson's Ranch to save the ill-fated Donner Party (California-bound emigrants who became snowbound in the Sierra Nevada earlier this winter; some have resorted to survival by cannibalism). * February 22 – Mexican–American War: Battle of Buena Vista – 5,000 American troops under General Zachary Taylor use their superiority in artillery to drive off 15,000 Mexican troops under Antonio López de Santa Anna, defeating the Mexicans the next da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxazine
Oxazines are heterocyclic compounds containing one oxygen and one nitrogen atom in a doubly unsaturated six-membered ring. Isomers exist depending on the relative position of the heteroatoms and relative position of the double bonds. By extension, the derivatives are also referred to as oxazines; examples include ifosfamide and morpholine (tetrahydro-1,4-oxazine). A commercially available dihydro-1,3-oxazine is a reagent in the Meyers synthesis of aldehydes. Fluorescent dyes such as Nile red and Nile blue are based on the aromatic benzophenoxazine. Cinnabarine and cinnabaric acid are two naturally occurring dioxazines, being derived from biodegradation of tryptophan. Dioxazines Dioxazines are pentacyclic compounds consisting of two oxazine subunits. A commercially important example is the pigment pigment violet 23. Benzoxazines Benzoxazines are bicyclic compounds formed by the ring fusion of a benzene ring with an oxazine. Polybenzoxazines are a class of polymers formed by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raphael Meldola
Raphael Meldola FRS (19 July 1849 – 16 November 1915) was a British chemist and entomologist. He was Professor of Organic Chemistry in the University of London, 1912–15. Life Born in Islington, London, he was descended from Raphael Meldola (1754–1828), a theologian who was acting minister of the Spanish and Portuguese Jews in London, 1804. Meldola was the only son of Samuel Meldola; married (1886) Ella Frederica, daughter of Maurice Davis of London. He was educated in chemistry at the Royal College of Chemistry, London. There is a portrait of Meldola (oil on canvas) by Solomon J. Solomon in the Royal Society collection; also a photograph by Maull & Fox, visiting card size. Career Meldola worked in the private laboratory of John Stenhouse (FRS 1848). He was appointed Lecturer, Royal College of Science (1872) and assisted Norman Lockyer with spectroscopy. Meldola was in charge of the British Eclipse Expedition to the Nicobar Islands (1875) and was Professor of Chemi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biebrich Scarlet
Biebrich scarlet (C.I. 26905) is a molecule used in Lillie's trichrome. The dye was created in 1878 by the German chemist Rudolf Nietzki. Biebrich scarlet dyes are used to color hydrophobic materials like fats and oils. The dye is an illegal dye for food additives because of its carcinogenic properties. Biebrich scarlet can have harmful effects on living and non-living organisms in natural water, therefore the pollutant must be removed. Removal of the pollutant involves absorption, membrane filtration, precipitation, ozonation, fungal detachment, and electrochemical separation. Hydrogel absorbents have active sites to which the dye is held using electrostatic interactions. Photocatalysis allows for almost total degradation of Biebrich scarlet azo dye bonds in less than 10 hours. Degradation of Biebrich scarlet is also observed using lignin peroxidase enzyme from wood rotting fungus in the presence of mediators like 2-chloro-1,4-dimethoxybenzene. See also * Masson's trichrome s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
P-benzoquinone
1,4-Benzoquinone, commonly known as ''para''-quinone, is a chemical compound with the formula C6H4O2. In a pure state, it forms bright-yellow crystals with a characteristic irritating odor, resembling that of chlorine, bleach, and hot plastic or formaldehyde. This six-membered ring compound is the oxidized derivative of 1,4-hydroquinone. The molecule is multifunctional: it exhibits properties of a ketone, being able to form oximes; an oxidant, forming the dihydroxy derivative; and an alkene, undergoing addition reactions, especially those typical for α,β-unsaturated ketones. 1,4-Benzoquinone is sensitive toward both strong mineral acids and alkali, which cause condensation and decomposition of the compound. Preparation 1,4-Benzoquinone is prepared industrially by oxidation of hydroquinone, which can be obtained by several routes. One route involves oxidation of diisopropylbenzene and the Hock rearrangement. The net reaction can be represented as follows: :C6H4(CHMe2)2 + 3 O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aniline
Aniline is an organic compound with the formula C6 H5 NH2. Consisting of a phenyl group attached to an amino group, aniline is the simplest aromatic amine In organic chemistry, an aromatic amine is an organic compound consisting of an aromatic ring attached to an amine. It is a broad class of compounds that encompasses aniline Aniline is an organic compound with the formula C6 H5 NH2. Consi .... It is an industrially significant Commodity chemicals, commodity chemical, as well as a versatile starting material for fine chemical synthesis. Its main use is in the manufacture of precursors to polyurethane, dyes, and other industrial chemicals. Like most volatile amines, it has the odor of rotten fish. It Combustion, ignites readily, burning with a smoky flame characteristic of aromatic compounds. It is toxic to humans. Relative to benzene, it is electron-rich. It thus participates more rapidly in electrophilic aromatic substitution reactions. Likewise, it is also prone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azo Dye
Azo dyes are organic compounds bearing the functional group R−N=N−R′, in which R and R′ are usually aryl and substituted aryl groups. They are a commercially important family of azo compounds, i.e. compounds containing the C-N=N-C linkage. Azo dyes are synthetic dyes and do not occur naturally. Most azo dyes contain only one azo group, but some dyes called "disazo dyes" contain two azo groups, some dyes called "trisazo dyes" contain three azo groups and are or more. Azo dyes comprise 60-70% of all dyes used in food and textile industries. Azo dyes are widely used to treat textiles, leather articles, and some foods. Chemically related derivatives of azo dyes include azo pigments, which are insoluble in water and other solvents. Classes Many kinds of azo dyes are known, and several classification systems exist. Some classes include disperse dyes, metal-complex dyes, reactive dyes, and substantive dyes. Also called direct dyes, substantive dyes are employed for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quinone
The quinones are a class of organic compounds that are formally "derived from aromatic compounds [such as benzene or naphthalene] by conversion of an even number of –CH= groups into –C(=O)– groups with any necessary rearrangement of double bonds, resulting in "a fully Conjugated system, conjugated cyclic diketone, dione structure". The archetypical member of the class is 1,4-benzoquinone or cyclohexadienedione, often called simply "quinone" (thus the name of the class). Other important examples are 1,2-benzoquinone (''ortho''-quinone), 1,4-naphthoquinone and anthraquinone, 9,10-anthraquinone. The name is derived from that of quinic acid (with the suffix "-one" indicating a ketone), since it is one of the compounds obtained upon oxidation of quinic acid. Quinic acid, like quinine is obtained from cinchona bark, called wikt:quinaquina, quinaquina in the indigenous languages of Peruvian tribes. Properties Quinones are oxidized derivatives of aromatic compounds and are often re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Rupe
Johan Hermann Wilhelm Rupe (October 9, 1866, in Basel – January 12, 1951) was a professor of organic chemistry at the University of Basel. His main field of interest was terpenes and campher as well as optical activity. Life Rupe was born on October 9, 1866 in Basel to Johannes Rupe and Mathilde Rupe (born Fischer) and went to school in Basel. He passed his Maturität in 1885 and then went on to study in Basel under Julius Piccard. He continued his studies at the University of Strasbourg under Rudolf Fittig and then in 1887 in Munich under Adolf von Baeyer. Rupe received his PhD in 1889 at Munich for his dissertation ''Über die Reduktionsprodukte der Dichloromuconsäure''. In 1894 he went to Mulhouse to become head of the "Chemieschule" in the organic division. Rupe habilitated in 1895 in Basel, where he moved in 1899. In 1903, he became an associate professor for organic chemistry at the University of Basel. He worked with the chemistry Professor Rudolf Nietzki, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
