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Edward Schunck
Henry Edward Schunck (16 August 1820 – 13 January 1903), also known as Edward von Schunck, was a British chemist who did much work with dyes. Early life and education Henry Edward Schunck was born in Manchester, the son of Martin Schunck, a German merchant. His grandfather was Major Johann-Carl Schunck (1745–1800). Edward started studying chemistry in Manchester with William Henry. The young Schunck was sent to further his chemical studies to Berlin where he studied under Heinrich Rose (1795–1864) who discovered niobium, diligently analysed minerals and other inorganic substances and studied the chemistry of titanium, phosphorus, arsenic, antimony, sulphur, selenium and tellurium. Schunck also studied at Berlin under Heinrich Gustav Magnus (1802–1870) who published over 80 papers on many diverse topics in chemistry and physics. After studying in Berlin he received his PhD under Justus Liebig at the University of Gießen. Work It was from Gießen that in 1841 he publi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fellow Of The Royal Society
Fellowship of the Royal Society (FRS, ForMemRS and HonFRS) is an award granted by the judges of the Royal Society of London to individuals who have made a "substantial contribution to the improvement of natural science, natural knowledge, including mathematics, engineering science, and medical science". Fellow, Fellowship of the Society, the oldest known scientific academy in continuous existence, is a significant honour. It has been awarded to many eminent scientists throughout history, including Isaac Newton (1672), Michael Faraday (1824), Charles Darwin (1839), Ernest Rutherford (1903), Srinivasa Ramanujan (1918), Albert Einstein (1921), Paul Dirac (1930), Winston Churchill (1941), Subrahmanyan Chandrasekhar (1944), Dorothy Hodgkin (1947), Alan Turing (1951), Lise Meitner (1955) and Francis Crick (1959). More recently, fellowship has been awarded to Stephen Hawking (1974), David Attenborough (1983), Tim Hunt (1991), Elizabeth Blackburn (1992), Tim Berners-Lee (2001), Venki R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichen
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches (); flat leaf-like structures ( |
Orsellinic Acid
Orsellinic acid, more specifically ''o''-orsellinic acid, is a phenolic acid. It is of importance in the biochemistry of lichens, from which it can be extracted. It is a common subunit of depsides. Chemistry It can be prepared by the oxidation of orsellaldehyde. This is also produced when everninic acid and ramalic acid is boiled with barium hydroxide Barium hydroxide is a chemical compound with the chemical formula Ba(OH)2. The monohydrate (''x'' = 1), known as baryta or baryta-water, is one of the principal compounds of barium. This white granular monohydrate is the usual commercial form. .... It forms colorless crystals in the form of needles which on rapid heating melt with decomposition in the neighborhood of 175 °C. [Sep 22, 2021: this citation to J Chromatog 511 needs to be revised because that paper makes no reference to crystals of orsellinic acid nor its melting point. In fact, the text never specifically mentions orsellinic acid: it simply appear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecanoric Acid
Lecanoric acid is a chemical produced by several species of lichen.ubChem - Lecanoric acid"> Lecanoric acid is classified as a polyphenol and a didepside and it functions as an antioxidant. The acid is named after the lichen ''Lecanora''. The acid has also been isolated from ''Usnea subvacata'', ''Parmotrema stuppuem'', ''Parmotrema tinctorum,'' '' Parmotrema grayana,'' Xanthoparmelia arida and Xanthoparmelia lecanorica. A related compound, 5-chlorolecanoric acid, is found in some species of ''Punctelia ''Punctelia'' is a genus of foliose lichens belonging to the large family Parmeliaceae. The genus, which contains about 50 species, was segregated from genus ''Parmelia'' in 1982. Characteristics that define ''Punctelia'' include the presence of ...''. References {{Reflist Polyphenols Benzoic acids Benzoate esters Lichen products ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vogelsberg Mountains
The is a large volcanic mountain range in the German Central Uplands in the state of Hesse, separated from the Rhön Mountains by the Fulda river valley. Emerging approximately 19 million years ago, the Vogelsberg is Central Europe's largest basalt formation, consisting of a multitude of layers that descend from their peak in ring-shaped terraces to the base. The main peaks of the Vogelsberg are the Taufstein (Vogelsberg), Taufstein, , and Hoherodskopf, , both now within the High Vogelsberg Nature Park. Location The Vogelsberg lies in the county of Vogelsbergkreis, around 60 kilometres northeast of Frankfurt am Main, Frankfurt between the towns of Alsfeld, Fulda, Büdingen and Nidda, Hesse, Nidda. To the northeast is the Knüllgebirge, Knüll, to the east the Rhön, to the southeast the Spessart and to the southwest the low-lying Wetterau, which transitions to the South Hessian lowlands of the Rhine-Main region. In the opposite direction, to the northwest, the Vo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orcinol
Orcinol is an organic compound with the formula CH3C6H3(OH)2. It occurs in many species of lichens including ''Roccella tinctoria'' and ''Lecanora''. Orcinol has been detected in the "toxic glue" of the ant species ''Camponotus saundersi''. It is a colorless solid. It is related to resorcinol, 1,3-C6H4(OH)2. Synthesis and reactions Orcinol was first prepared by dehydroacetic acid, a conversion that involved ring-opening of the pyrone to a triketone. This early experiment helped establish the rich condensation chemistry of polyketides. It can be obtained by fusing extract of aloes with potash, followed by acidification. It undergoes O-methylation with dimethylsulfate. It is used in the production of the dye orcein and as a reagent in some chemical tests for pentoses, such as Bial's Test. It may be synthesized from toluene; more interesting is its production when acetone dicarboxylic ester is condensed with the aid of sodium. It crystallizes in colorless prisms with one molecul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert John Kane
Sir Robert John Kane (24 September 1809 – 16 February 1890) was an Irish chemist and educator. Early life Kane was born at 48 Henry Street, Dublin on 24 September 1809 to John and Eleanor Kean (née Troy). His father was involved in the Irish Rebellion of 1798 and fled for a time to France where he studied chemistry. Back in Dublin, Kean (now Kane) founded the Kane Company and manufactured sulphuric acid. The young Kane studied chemistry at his father's factory, and attended lectures at the Royal Dublin Society as a teenager. He published his first paper in 1828, ''Observations on the existence of chlorine in the native peroxide of manganese'', in the London Quarterly Journal of Science, Literature and Art. The following year, his description of the natural arsenide of manganese resulted in the compound being named Kaneite in his honour. He studied medicine at Trinity College, Dublin, graduating in 1834 whilst working in the Meath Hospital. He was appointed Professor of Che ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean-Baptiste Dumas
Jean Baptiste André Dumas (14 July 180010 April 1884) was a French chemist, best known for his works on organic analysis and synthesis, as well as the determination of atomic weights (relative atomic masses) and molecular weights by measuring vapor densities. He also developed a method for the analysis of nitrogen in compounds. Biography Dumas was born in Alès (Gard), and became an apprentice to an apothecary in his native town. In 1816, he moved to Geneva, where he attended lectures by M. A. Pictet in physics, C. G. de la Rive in chemistry, and A. P. de Candolle in botany, and before he had reached his majority, he was engaged with Pierre Prévost in original work on problems of physiological chemistry and embryology. In 1822, he moved to Paris, acting on the advice of Alexander von Humboldt, where he became professor of chemistry, initially at the Lyceum, later (1835) at the École polytechnique. He was one of the founders of the École centrale des arts et manufactures ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friedrich Heeren
Friedrich Heeren (11 August 1803 – 2 May 1885) was a German chemist. He received his doctorate in Göttingen, and from 1831 was an instructor of technological-chemical subjects at the Polytechnic School in Hannover (''Höheren Gewerbeschule''). Here he taught classes in physics, mineralogy and chemistry. With technologist Karl Karmarsch (1803-1879), he published a technical dictionary A dictionary is a listing of lexemes from the lexicon of one or more specific languages, often arranged alphabetically (or by radical and stroke for ideographic languages), which may include information on definitions, usage, etymologies ... (''Technisches Wörterbuch''). Also, with Karmarsch, he developed a process for the preparation of gun cotton. In 1881 he introduced an apparatus for the testing of milk ( lactometer, patent# 241655). References * External links 1803 births 1885 deaths 19th-century German chemists University of Göttingen alumni Scientists fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
