|
Wilhelm Weith
Wilhelm Weith (9 May 1846 in Bad Homburg vor der Höhe – 29 November 1881 in Ajaccio) was a German-Swiss chemist. He studied chemistry at the polytechnic institute in Zürich and at the University of Heidelberg, receiving his doctorate in 1865 from the University of Zürich. Shortly afterwards, he obtained his habilitation and became a lecturer at both the polyclinic and university. At Zürich, he often served as a substitute teacher for chemist Georg Städeler. In 1871 he became an associate professor of chemistry, followed by a full professorship in 1874. He died from an illness during a stay in Ajaccio, Corsica on 28 November 1881, aged 35.ADB:Weith, Wilhelm In: |
Bad Homburg Vor Der Höhe
Bad Homburg vor der Höhe (, ) is the district town of the Hochtaunuskreis, Hesse, Germany, on the southern slope of the Taunus mountains. Bad Homburg is part of the Frankfurt Rhein-Main urban area. The town's official name is ''Bad Homburg v.d.Höhe'', which distinguishes it from other places named Homburg. The town has become best known for its mineral springs and spa (hence the prefix ''Bad'', meaning "bath"), and for its casino. , the town used the marketing slogan ''Champagnerluft und Tradition'' (Champagne air and tradition). , Bad Homburg was one of the wealthiest towns in Germany (while the Hochtaunuskreis itself and the Landkreis Starnberg in Bavaria regularly vie for the title of the wealthiest district in Germany). History Medieval origins Local tradition holds that Bad Homburg's documented history began with the mention of the ''Villa Tidenheim'' in the Lorsch codex, associated with the year 782. This ''Villa Tidenheim'' was equated with the historic city c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guanamine
In organic chemistry, a guanamine is an organic compound with the formula (H2NC)2N3CR. They are heterocycles of the triazine class. Guanamines are closely related to melamine ((H2NC)3N3), except with one amino substituent replaced by an organic group. With two amines, guanamines are bifunctional, whereas melamine is trifunctional. This difference is exploited in the use of guanamines to modify the crosslink density in melamine resins. They are white or colorless solids of low toxicity. Some popular guanamines are the phenyl, methyl and nonyl derivatives, called benzoguanamine, acetoguanamine, and capriguanamine. They are all prepared by the condensation of cyanoguanidine with the corresponding nitrile In organic chemistry, a nitrile is any organic compound that has a functional group. The name of the compound is composed of a base, which includes the carbon of the , suffixed with "nitrile", so for example is called " propionitrile" (or pr ...: :(H2N)2C=NCN + RCN ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ETH Zurich Alumni
Eth ( , uppercase: ⟨Ð⟩, lowercase: ⟨ð⟩; also spelled edh or eð), known as in Old English, is a letter used in Old English, Middle English, Icelandic, Faroese (in which it is called ), and Elfdalian. It was also used in Scandinavia during the Middle Ages, but was subsequently replaced with , and later . It is often transliterated as . The lowercase version has been adopted to represent a voiced dental fricative ( IPA: ) in the International Phonetic Alphabet. Faroese In Faroese, is not assigned to any particular phoneme and appears mostly for etymological reasons, but it indicates most glides. When appears before , it is in a few words pronounced . In the Faroese alphabet, follows . Khmer is sometimes used in Khmer romanization to represent '. Icelandic In Icelandic, , called "eð", represents an alveolar non-sibilant fricative, voiced intervocalically and word-finally, and voiceless otherwise, which form one phoneme, . Generally, is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academic Staff Of ETH Zurich
An academy (Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of tertiary education. The name traces back to Plato's school of philosophy, founded approximately 386 BC at Akademia, a sanctuary of Athena, the goddess of wisdom and skill, north of Athens, Greece. The Royal Spanish Academy defines academy as scientific, literary or artistic society established with public authority and as a teaching establishment, public or private, of a professional, artistic, technical or simply practical nature. Etymology The word comes from the ''Academy'' in ancient Greece, which derives from the Athenian hero, '' Akademos''. Outside the city walls of Athens, the gymnasium was made famous by Plato as a center of learning. The sacred space, dedicated to the goddess of wisdom, Athena, had formerly been an olive grove, hence the expression "the groves of Academe". In these gardens, the philosopher Plato conversed with followers. Plato developed his session ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Bad Homburg Vor Der Höhe
The term "the people" refers to the public or Common people, common mass of people of a polity. As such it is a concept of human rights law, international law as well as constitutional law, particularly used for claims of popular sovereignty. In contrast, a people is any plurality of Person, persons considered as a whole. Used in politics and law, the term "a people" refers to the collective or community of an ethnic group or nation. Concepts Legal Chapter One, Article One of the Charter of the United Nations states that "peoples" have the right to self-determination. Though the mere status as peoples and the right to self-determination, as for example in the case of Declaration on the Rights of Indigenous Peoples, Indigenous peoples (''peoples'', as in all groups of indigenous people, not merely all indigenous persons as in ''indigenous people''), does not automatically provide for independence, independent sovereignty and therefore secession. Indeed, judge Ivor Jennings i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1881 Deaths
Events January * January 1– 24 – Siege of Geok Tepe: Russian troops under General Mikhail Skobelev defeat the Turkomans. * January 13 – War of the Pacific – Battle of San Juan and Chorrillos: The Chilean army defeats Peruvian forces. * January 15 – War of the Pacific – Battle of Miraflores: The Chileans take Lima, capital of Peru, after defeating its second line of defense in Miraflores. * January 24 – William Edward Forster, chief secretary for Ireland, introduces his Coercion Bill, which temporarily suspends habeas corpus so that those people suspected of committing an offence can be detained without trial; it goes through a long debate before it is accepted February 2. Note that Coercion bills had been passed almost annually in the 19th century, with a total of 105 such bills passed from 1801 to 1921. * January 25 – Thomas Edison and Alexander Graham Bell form the Oriental Telephone Company. February * Febru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1846 Births
Events January–March * January 5 – The United States House of Representatives votes to stop sharing the Oregon Country with the United Kingdom. * January 13 – The Milan–Venice railway's bridge, over the Venetian Lagoon between Mestre and Venice in Italy, opens, the world's longest since 1151. * January 23 – Ahmad I ibn Mustafa, Bey of Tunis, declares the legal abolition of slavery in Tunisia. * February 4 – Led by Brigham Young, many Mormons in the U.S. begin their migration west from Nauvoo, Illinois, to the Great Salt Lake in what becomes Utah. * February 10 – First Anglo-Sikh war: Battle of Sobraon – British forces in India defeat the Sikhs. * February 18 – The Galician Peasant Uprising of 1846 begins in Austria. * February 19 – Texas annexation: United States president James K. Polk's annexation of the Republic of Texas is finalized by Texas president Anson Jones in a formal ceremony of transfer of sovereignty. The newly formed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitroprusside
Sodium nitroprusside (SNP), sold under the brand name Nitropress among others, is a medication used to lower blood pressure. This may be done if the blood pressure is very high and resulting in symptoms, in certain types of heart failure, and during surgery to decrease bleeding. It is used by continuous injection into a vein. Onset is nearly immediate and effects last for up to ten minutes. It is available as a generic medication. Side effects and mechanism Common side effects include low blood pressure and cyanide toxicity. Other serious side effects include methemoglobinemia. It is not generally recommended during pregnancy due to concerns of side effects. High doses are not recommended for more than ten minutes. It works by increasing nitric oxide levels in the blood, which increases cGMP levels in cells, and causes dilation of blood vessels. History, society and culture Sodium nitroprusside was discovered as early as 1850 and found to be useful in medicine in 1928. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aniline
Aniline (From , meaning ' indigo shrub', and ''-ine'' indicating a derived substance) is an organic compound with the formula . Consisting of a phenyl group () attached to an amino group (), aniline is the simplest aromatic amine. It is an industrially significant 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 ignites readily, burning with a smoky flame characteristic of aromatic compounds. It is toxic to humans. Relative to benzene, aniline is "electron-rich". It thus participates more rapidly in electrophilic aromatic substitution reactions. Likewise, it is also prone to oxidation: while freshly purified aniline is an almost colorless oil, exposure to air results in gradual darkening to yellow or red, due to the formation of strongly colored, oxidized impurities. Ani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ajaccio
Ajaccio (, , ; French language, French: ; or ; , locally: ; ) is the capital and largest city of Corsica, France. It forms a communes of France, French commune, prefecture of the Departments of France, department of Corse-du-Sud, and head office of the ''Territorial collectivity, Collectivité territoriale de Corse'' (capital city of Corsica). It is also the largest settlement on the island. Ajaccio is located on the west coast of the island of Corsica, southeast of Marseille. The original city went into decline in the Middle Ages, but began to prosper again after the Republic of Genoa, Genoese built a citadel in 1492, to the south of the earlier settlement. After the Corsican Republic was declared in 1755, the Genoese continued to hold several citadels, including Ajaccio, until the French conquest of Corsica, French took control of the island. The inhabitants of the commune are known as ''Ajacciens'' (men) or ''Ajacciennes'' (women). The most famous of these is Napoleon B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allgemeine Deutsche Biographie
(ADB; ) is one of the most important and comprehensive biographical reference works in the German language. It was published by the Historical Commission of the Bavarian Academy of Sciences between 1875 and 1912 in 56 volumes, printed in Leipzig by Duncker & Humblot. The ADB contains biographies of about 26,500 people who died before 1900 and lived in the German language Sprachraum of their time, including people from the Netherlands before 1648. Its successor, the , was started in 1953 and is planned to be finished in 2023. The index and full-text articles of ADB and NDB are freely available online via the website ''German Biography'' ('' Deutsche Biographie''). Notes References * * External links * ''Allgemeine Deutsche Biographie'' – full-text articles at German Wikisource Wikisource is an online wiki-based digital library of free-content source text, textual sources operated by the Wikimedia Foundation. Wikisource is the name of the project as a whole; it i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
