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Pyrene (other)
Pyrene may refer to: *Pyrene, a chemical compound. *Carbon tetrachloride, pyrene is the brand name used by the Pyrene Manufacturing Company for Carbon tetrachloride. *Pyrene (mythology), consort of Ares and the mother of Cycnus in Greek mythology *Pyrene, a Celtic city near the sources of the Danube mentioned by Herodotus: see Heuneburg *The Pyrene Company Limited, a manufacturer of firefighting equipment * The Pyrene Building, Golden Mile (Brentford), a noted former Pyrene Company factory in London, England in the Art Deco style *Pyrene (gastropod), a genus of sea snails from the family Columbellidae *Pyrena A pyrena or pyrene (commonly called a "pit" or "stone") is the fruitstone within a drupe or drupelet produced by the ossification of the endocarp or lining of the fruit. It consists of a hard endocarp tissue surrounding one or more seeds (also ..., a kind of nutlet * Pyrenees, a mountain range between France and Spain See also * Pyrenoid, a stone-like structure w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrene
Pyrene is a polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromatic system. The chemical formula is . This yellow solid is the smallest peri-fused PAH (one where the rings are fused through more than one face). Pyrene forms during incomplete combustion of organic compounds. Occurrence and properties Pyrene was first isolated from coal tar, where it occurs up to 2% by weight. As a peri-fused PAH, pyrene is much more resonance-stabilized than its five-member-ring containing isomer fluoranthene. Therefore, it is produced in a wide range of combustion conditions. For example, automobiles produce about 1 μg/km.Senkan, Selim and Castaldi, Marco (2003) "Combustion" in ''Ullmann's Encyclopedia of Industrial Chemistry'', Wiley-VCH, Weinheim. Reactions Oxidation with chromate affords perinaphthenone and then naphthalene-1,4,5,8-tetracarboxylic acid. Pyrene undergoes a series of hydrogenation reactions and is susceptible to halogen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Tetrachloride
Carbon tetrachloride, also known by many other names (such as tetrachloromethane, also IUPAC nomenclature of inorganic chemistry, recognised by the IUPAC, carbon tet in the cleaning industry, Halon-104 in firefighting, and Refrigerant-10 in HVACR) is an organic compound with the chemical formula CCl4. It is a colourless liquid with a "sweet" smell that can be detected at low levels. It is practically incombustible at lower temperatures. It was formerly widely used in fire extinguishers, as a precursor to refrigerants and as a cleaning agent, but has since been phased out because of environmental and safety concerns. Exposure to high concentrations of carbon tetrachloride (including vapor) can affect the central nervous system and degenerate the liver and kidneys. Prolonged exposure can be fatal. Properties In the carbon tetrachloride molecule, four chlorine atoms are positioned symmetrically as corners in a tetrahedron, tetrahedral configuration joined to a central carbon atom by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrene (mythology)
In Greek mythology, Pyrene (Ancient Greek: Πυρήνη) may refer to: * Pyrene, daughter of King Bebrycius and a lover (or victim, depending on the myth) of Heracles. She bore a serpent and became so terrified that she fled to the woods where she died. Heracles created a tomb for her by piling up rocks thus forming the mountain range of the Pyrenees, named after her. * Pyrene, also called Pelopia, mother of Cycnus with Ares.Apollodorus2.5.11/ref> Notes References * Apollodorus Apollodorus (Ancient Greek, Greek: Ἀπολλόδωρος ''Apollodoros'') was a popular name in ancient Greece. It is the masculine gender of a noun compounded from Apollo, the deity, and doron, "gift"; that is, "Gift of Apollo." It may refer to: ..., ''The Library'' with an English Translation by Sir James George Frazer, F.B.A., F.R.S. in 2 Volumes, Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1921. ISBN 0-674-99135-4Online version at the Perseus Digital Library. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heuneburg
The Heuneburg is a prehistoric hillfort by the river Danube in Hundersingen near Herbertingen, between Ulm and Sigmaringen, Baden-Württemberg, in the south of Germany, close to the modern borders with Switzerland and Austria. It is considered to be one of the most important early Celtic centres in Central Europe. Apart from the fortified citadel, there are extensive remains of settlements and burial areas spanning several centuries. The fortified citadel measures about . It stood on a strategically positioned mountain spur that rises steeply 40 m above the Danube. It is at the centre of a fertile river plain, surrounded by rolling hill country. Discovery and excavations The site was first noted in the 1820s. In 1882, recognised its importance and correctly identified it as a prehistoric fortification. He misidentified the lower fortifications as medieval. Some of the nearby burial mounds were opened in the 19th century. Sporadic excavation on the citadel began in the 192 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Pyrene Company Limited
Carbon tetrachloride pump fire extinguisher The Pyrene Company Limited from their beginning in 1914, until 1971 when they became Chubb Fire Security Limited, were among the world's leaders in the manufacture of fire fighting equipment. The name Pyrene was epitomised by their famous 'pump' extinguisher which was installed on public transport, commercial and private vehicles throughout the western world. Company history In 1907, a Scottish engineer, unable to get financial backing in the UK, took his idea for a fire extinguisher to the US. He established what became known as the Pyrene Company of Delaware in 1909. A British offshoot, The Pyrene Company Limited was founded in 1914 when Wallace B. Phillips, an American businessman, set up in Great Queen Street, London, selling 'pump' extinguishers. The company moved to Grosvenor Gardens, London in 1918, and then to Stoke Newington in 1920, where a factory to manufacture soda-acid and foam fire extinguishers was established. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden Mile (Brentford)
The Golden Mile is the name given to a stretch of the Great West Road north of Brentford running west from the western boundary of Chiswick in London, United Kingdom. It was so called due to the concentration of industry along this short stretch of road. This section of the Great West Road was opened in 1925 in order to bypass the notoriously congested Brentford High Street and several factories of architectural merit were rapidly built along the road to take advantage of both the good communications it provided, and the easy availability of land for new buildings. Many examples of the Art Deco architecture remain. However, no commercial buildings could be built further west along the Great West Road (A4) after Syon Lane (Gillette Corner) as the land was owned by the Church Commissioners. Syon Lane railway station was built especially for the workers at these various factories. Land for the Great West Road was compulsorily purchased. It seems likely that housing was dic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrene (gastropod)
''Pyrene'' is a genus of small sea snails, marine gastropod mollusks in the family Columbellidae.Bouchet, P. (2014). Pyrene Röding, 1798. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=204994 on 2014-05-29 Species Species within the genus ''Pyrene'' include: * '' Pyrene albinodulosa ogasawarana'' (Pilsbry, 1904-b) * '' Pyrene aspersa'' (G.B. Sowerby I, 1844) * '' Pyrene decussata'' (G.B. Sowerby I, 1844) * '' Pyrene exima'' (Reeve, 1859 in 1843-65) * '' Pyrene fasciata'' G.B. Sowerby I, 1825 * '' Pyrene flava'' (Bruguière, 1789) * '' Pyrene morrisoni'' Willan, 2001 * '' Pyrene obscura'' (G.B. Sowerby I, 1844) * '' Pyrene obtusa'' (G.B. Sowerby I, 1832) * '' Pyrene ocellatula'' (Hervier, 1899) * '' Pyrene picta'' (Reeve, 1859) * '' Pyrene punctata'' (Bruguière, 1789) * '' Pyrene rapaensis'' K. Monsecour & D. Monsecour, 2018 * '' Pyrene sorongensis'' Van Bruggen, 1956 (taxon inquirendum) * '' Pyrene splendidula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrena
A pyrena or pyrene (commonly called a "pit" or "stone") is the fruitstone within a drupe or drupelet produced by the ossification of the endocarp or lining of the fruit. It consists of a hard endocarp tissue surrounding one or more seeds (also called the "kernel"). The hardened endocarp which constitutes the pyrene provides a protective physical barrier around the seed, shielding it from pathogens and herbivory. While many drupes are monopyrenous, containing only one pyrene, pome-type fruit with a hard, stony (rather than leathery) endocarp are typically polypyrenous drupes, containing multiple pyrenes. Development The hardening of the endocarp of a developing drupe occurs via secondary cell wall formation and lignification. The biopolymer lignin, also found in wood, provides a structure within secondary cell walls which supports the polymerisation of cellulose and hemicellulose; together these polymers provide the endocarp with tensile strength and stiffness. Further harden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrenees
The Pyrenees (; es, Pirineos ; french: Pyrénées ; ca, Pirineu ; eu, Pirinioak ; oc, Pirenèus ; an, Pirineus) is a mountain range straddling the border of France and Spain. It extends nearly from its union with the Cantabrian Mountains to Cap de Creus on the Mediterranean Sea, Mediterranean coast. It reaches a maximum altitude of at the peak of Aneto. For the most part, the main crest forms a divide between Spain and France, with the microstate of Andorra sandwiched in between. Historically, the Crown of Aragon and the Kingdom of Navarre extended on both sides of the mountain range. Etymology In Greek mythology, Pyrene (mythology), Pyrene is a princess who eponym, gave her name to the Pyrenees. The Greek historiography, Greek historian Herodotus says Pyrene is the name of a town in Celts, Celtic Europe. According to Silius Italicus, she was the virgin daughter of Bebryx, a king in Narbonensis, Mediterranean Gaul by whom the hero Hercules was given hospitality during his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
