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Heinrich Wilhelm Ferdinand Wackenroder
Heinrich Wilhelm Ferdinand Wackenroder (8 March 1798 Burgdorf, Hanover – 4 September 1854 Jena) was a German chemist. Career and work In June, 1826 Wackenroder published his doctoral dissertation, “On Anthelminthics in the Vegetable Kingdom,” presented to Göttingen University, which earned him praise, and the Royal Prize. In 1827 he obtained his doctorate from the University of Erlangen, becoming an associate professor the following year at the University of Jena, where he worked with Johann Wolfgang Döbereiner (1780-1849). In 1836 he was appointed Professor ordinarius and Director of the Pharmacy Institute, later known as the Chemical-Pharmaceutical Institute. He became especially known for his discovery of carotin and his correspondence with Goethe. In subsequent years he became co-editor of Archiv der Pharmazie. In 1826 Wackenroder isolated corydalin from ''Corydalis cava'' and in 1831 isolated carotin in an ether extract from carrots. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burgdorf, Hanover
Burgdorf (Standard German pronunciation: bʊʁk.dɔʁf Low German: Bortörp) is a town in the Hanover Region, in Lower Saxony, Germany. It is situated approximately 22 km northeast of Hanover. Until 1974, Burgdorf was the capital of the Burgdorf district. The town and its surrounding areas are known for the tradition of growing white Asparagus and for breeding Hanoverian horses. Burgdorf hosts a monthly horse market from April to September every year. Geography Burgdorf lies between the city of Hanover and the towns Celle and Peine. It shares borders with Uetze, Lehrte, Isernhagen, Burgwedel and the Celle district. The river Aue flows through the town. The landscape is shaped by the Burgdorf-Peine Geest, a mostly flat landscape with low hills and sandy soil. Forests consist mostly of Scots pines, birch trees and English oaks. The municipal area is surrounded by the Altwarmbüchener and Oldhorster Moor in the west, and the Burgdorfer Holz forest in the east. Burgdorf com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corydalis
''Corydalis'' (from Greek ''korydalís'' "crested lark") is a genus of about 470 species of annual and perennial herbaceous plants in the family Papaveraceae, native to the temperate Northern Hemisphere and the high mountains of tropical eastern Africa. They are most diverse in China and the Himalayas, with at least 357 species in China. Ecology ''Corydalis'' species are used as food plants by the larvae of some Lepidoptera species (butterflies), especially the clouded Apollo. Toxicity ''Corydalis cava'' and some other tuberous species contain the alkaloid bulbocapnine, which is occasionally used in medicine but scientific evidence is lacking in the correct dosages and side effects. Many of the species in ''Corydalis'' contain other toxins and alkaloids like canadine, which blocks calcium. The species ''C. caseana'' is poisonous to livestock. Taxonomy Current species There are about 470 species, including: * ''Corydalis ambigua'' * ''Corydalis aurea'' * ''Corydalis buschii' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Jena Faculty
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. Universities typically offer both undergraduate and postgraduate programs. In the United States, the designation is reserved for colleges that have a graduate school. The word ''university'' is derived from the Latin ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". The first universities were created in Europe by Catholic Church monks. The University of Bologna (''Università di Bologna''), founded in 1088, is the first university in the sense of: *Being a high degree-awarding institute. *Having independence from the ecclesiastic schools, although conducted by both clergy and non-clergy. *Using the word ''universitas'' (which was coined at its foundation). *Issuing secular and non-secular degrees: grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Hanover Region
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century German Chemists
The 19th (nineteenth) century began on 1 January 1801 ( MDCCCI), and ended on 31 December 1900 ( MCM). The 19th century was the ninth century of the 2nd millennium. The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanding beyond its British homeland for the first time during this century, particularly remaking the economies and societies of the Low Countries, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Gunpowder empires, Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under Colonialism, colonial rule. It was also marked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1854 Deaths
Events January–March * January 4 – The McDonald Islands are discovered by Captain William McDonald aboard the ''Samarang''. * January 6 – The fictional detective Sherlock Holmes is perhaps born. * January 9 – The Teutonia Männerchor in Pittsburgh, U.S.A. is founded to promote German culture. * January 20 – The North Carolina General Assembly in the United States charters the Atlantic and North Carolina Railroad, to run from Goldsboro through New Bern, to the newly created seaport of Morehead City, near Beaufort. * January 21 – The iron clipper runs aground off the east coast of Ireland, on her maiden voyage out of Liverpool, bound for Australia, with the loss of at least 300 out of 650 on board. * February 11 – Major streets are lit by coal gas for the first time by the San Francisco Gas Company; 86 such lamps are turned on this evening in San Francisco, California. * February 13 – Mexican troops force William Walker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1798 Births
Events January–June * January – Eli Whitney contracts with the U.S. federal government for 10,000 muskets, which he produces with interchangeable parts. * January 4 – Constantine Hangerli enters Bucharest, as Prince of Wallachia. * January 22 – A coup d'état is staged in the Netherlands ( Batavian Republic). Unitarian Democrat Pieter Vreede ends the power of the parliament (with a conservative-moderate majority). * February 10 – The Pope is taken captive, and the Papacy is removed from power, by French General Louis-Alexandre Berthier. * February 15 – U.S. Representative Roger Griswold (Fed-CT) beats Congressman Matthew Lyon (Dem-Rep-VT) with a cane after the House declines to censure Lyon earlier spitting in Griswold's face; the House declines to discipline either man.''Harper's Encyclopaedia of United States History from 458 A. D. to 1909'', ed. by Benson John Lossing and, Woodrow Wilson (Harper & Brothers, 1910) p171 * March &ndas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrogen Sulphide
Hydrogen sulfide is a chemical compound with the formula . It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs. The underground mine gas term for foul-smelling hydrogen sulfide-rich gas mixtures is ''stinkdamp''. Swedish chemist Carl Wilhelm Scheele is credited with having discovered the chemical composition of purified hydrogen sulfide in 1777. The British English spelling of this compound is hydrogen sulphide, a spelling no longer recommended by the Royal Society of Chemistry or the International Union of Pure and Applied Chemistry. Hydrogen sulfide is toxic to humans and most other animals by inhibiting cellular respiration in a manner similar to hydrogen cyanide. When it is inhaled or it or its salts are ingested in high amounts, damage to organs occurs rapidly with symptoms ranging from breathing difficulties to convulsions and death. Despite this, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulphuric Acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formula . It is a colorless, odorless and viscous liquid that is miscible with water. Pure sulfuric acid does not exist naturally on Earth due to its strong affinity to water vapor; it is hygroscopic and readily absorbs water vapor from the air. Concentrated sulfuric acid is highly corrosive towards other materials, from rocks to metals, since it is an oxidant with powerful dehydrating properties. Phosphorus pentoxide is a notable exception in that it is not dehydrated by sulfuric acid, but to the contrary dehydrates sulfuric acid to sulfur trioxide. Upon addition of sulfuric acid to water, a considerable amount of heat is released; thus the reverse procedure of adding water to the acid should not be performed since the heat released may boil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polythionic Acid
Polythionic acid is an oxoacid which has a straight chain of sulfur atoms and has the chemical formula Sn(SO3H)2 (''n'' > 2). Trithionic acid (H2S3O6), tetrathionic acid (H2S4O6) are simple examples. They are the conjugate acids of polythionates. The compounds of ''n'' 2− + 2 HCl :: SCl2 + 2 → 3SS3SO3sup>2− + 2 HCl Anhydrous polythionic acids can be formed in diethyl ether solution by the following three general ways: : HSnSO3H + SO3 → H2S''n''+2O6 (''n'' = 1, 2 ... 8) : H2Sn + 2 SO3 → H2S''n''+2O6 (''n'' = 1, 2 ... 8) : 2 HSnSO3H + I2 → H2S2''n''+2O6 + 2 HI (''n'' = 1, 2 ... 6) Polythionic acids with a small number of sulfur atoms in the chain (''n'' = 3, 4, 5, 6) are the most stable. Polythionic acids are stable only in aqueous solutions, and are rapidly destroyed at higher concentrations with the release of sulfur, sulfur dioxide and - sometimes - sulfuric acid. Acid salts of polythionic acids do not exist. Polythionate ions are sign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carrots
The carrot (''Daucus carota'' subsp. ''sativus'') is a root vegetable, typically orange in color, though purple, black, red, white, and yellow cultivars exist, all of which are domesticated forms of the wild carrot, ''Daucus carota'', native to Europe and Southwestern Asia. The plant probably originated in Persia and was originally cultivated for its leaves and seeds. The most commonly eaten part of the plant is the taproot, although the stems and leaves are also eaten. The domestic carrot has been selectively bred for its enlarged, more palatable, less woody-textured taproot. The carrot is a biennial plant in the umbellifer family, Apiaceae. At first, it grows a rosette of leaves while building up the enlarged taproot. Fast-growing cultivars mature within three months (90 days) of sowing the seed, while slower-maturing cultivars need a month longer (120 days). The roots contain high quantities of alpha- and beta-carotene, and are a good source of vitamin A, vitamin K, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ether
In organic chemistry, ethers are a class of compounds that contain an ether group—an oxygen atom connected to two alkyl or aryl groups. They have the general formula , where R and R′ represent the alkyl or aryl groups. Ethers can again be classified into two varieties: if the alkyl or aryl groups are the same on both sides of the oxygen atom, then it is a simple or symmetrical ether, whereas if they are different, the ethers are called mixed or unsymmetrical ethers. A typical example of the first group is the solvent and anaesthetic diethyl ether, commonly referred to simply as "ether" (). Ethers are common in organic chemistry and even more prevalent in biochemistry, as they are common linkages in carbohydrates and lignin. Structure and bonding Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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