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Chrysochus Asclepiadeus
''Chrysochus asclepiadeus'' (or ''Eumolpus asclepiadeus'') is a member of the leaf beetle subfamily Eumolpinae. It is considered the type species of the genus '' Chrysochus'', though it has sometimes been placed within the genus ''Eumolpus''. It is the only species of ''Chrysochus'' distributed in the western Palaearctic. It is mainly found in Europe, though it is also known from Kazakhstan and Turkey in Asia. Taxonomic history The species was first described by Peter Simon Pallas, who gave it the scientific name ''Chrysomela asclepiadea'' in 1773. The species epithet, ''aescelpiadea'' (or ''asclepiadeus''), is named after the milkweed genus ''Asclepias'', one of the species' food plants. The species was later twice described again under two separate names: Guillaume-Antoine Olivier named it ''Cryptocephalus cyaneus'' in 1791 (from the Latin , meaning "dark blue"), while Johan Christian Fabricius named it ''Chrysomela praetiosa'' in 1792. The latter was sometimes spelled "''pretio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Simon Pallas
Peter Simon Pallas Fellow of the Royal Society, FRS FRSE (22 September 1741 – 8 September 1811) was a Prussian zoologist and botanist who worked in Russia between 1767 and 1810. Life and work Peter Simon Pallas was born in Berlin, the son of Professor of Surgery Simon Pallas. He studied with private tutors and took an interest in natural history, later attending the University of Halle and the University of Göttingen. In 1760, he moved to the University of Leiden and passed his doctor's degree at the age of 19. Pallas travelled throughout the Netherlands and to London, improving his medical and surgical knowledge. He then settled at The Hague, and his new system of animal classification was praised by Georges Cuvier. Pallas wrote ''Miscellanea Zoologica'' (1766), which included descriptions of several vertebrates new to science which he had discovered in the Dutch museum collections. A planned voyage to southern Africa and the East Indies fell through when his father reca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Alexandre Auguste Chevrolat
Louis Alexandre Auguste Chevrolat was a French entomologist, born 29 March 1799 in Paris and died 16 December 1884 in Paris. In government service in Paris, this amateur entomologist studied mainly beetles and birds. He published nearly 250 notes and papers and was the author of more than 2,000 species. He was one of the founders of the Société entomologique de France in 1832. On his death, his collection was dispersed. Part of his collection is now in the Natural History Museum in London along with some manuscripts. Works (Selection) * 1833a. Description de Buprestis analis. ''Magasin de Zoologie'' 1833. Insectes, Nr. 60, 1 color plat* 1833b. ''Coléoptères du Mexique'', Fascicle 5 pp. Oct. 1833. Strasbourg. * 1834. ''Coléoptères du Mexique'', Fascicle 0 pp. Mar. 1834; Fascicle 8 pp. Nov. 1834. Strasbourg. * 1835. ''Coléoptères du Mexique'', Fascicle 0 pp. Jan. 1835; Fascicle 8 pp. Jan. 1835; Fascicle 8 pp. June 1835; Fascicle 6 pp. July 1835. Fascicle 8 pp. 8 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diacetyl Putrescine
Diacetyl (IUPAC systematic name: butanedione or butane-2,3-dione) is an organic compound with the chemical formula (CH3CO)2. It is a yellow liquid with an intensely buttery flavor. It is a vicinal diketone (two C=O groups, side-by-side). Diacetyl occurs naturally in alcoholic beverages and is added as a flavoring to some foods to impart its buttery flavor. Chemical structure A distinctive feature of diacetyl (and other vicinal diketones) is the long C–C bond linking the carbonyl centers. This bond distance is about 1.54 Å, compared to 1.45 Å for the corresponding C–C bond in 1,3-butadiene. The elongation is attributed to repulsion between the polarized carbonyl carbon centers. Occurrence and biosynthesis Diacetyl arises naturally as a byproduct of fermentation. In some fermentative bacteria, it is formed via the thiamine pyrophosphate-mediated condensation of pyruvate and acetyl CoA. Sour (cultured) cream, cultured buttermilk, and cultured butter are produced b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucine
Leucine (symbol Leu or L) is an essential amino acid that is used in the biosynthesis of proteins. Leucine is an α-amino acid, meaning it contains an α-amino group (which is in the protonated −NH3+ form under biological conditions), an α- carboxylic acid group (which is in the deprotonated −COO− form under biological conditions), and a side chain isobutyl group, making it a non-polar aliphatic amino acid. It is essential in humans, meaning the body cannot synthesize it: it must be obtained from the diet. Human dietary sources are foods that contain protein, such as meats, dairy products, soy products, and beans and other legumes. It is encoded by the codons UUA, UUG, CUU, CUC, CUA, and CUG. Like valine and isoleucine, leucine is a branched-chain amino acid. The primary metabolic end products of leucine metabolism are acetyl-CoA and acetoacetate; consequently, it is one of the two exclusively ketogenic amino acids, with lysine being the other. It is the most import ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tryptophane
Tryptophan (symbol Trp or W) is an α-amino acid that is used in the biosynthesis of proteins. Tryptophan contains an Alpha_and_beta_carbon , α-amino group, an α-carboxylic acid group, and a side chain indole, making it a polar molecule with a non-polar Aromatic hydrocarbon, aromatic Alpha and beta carbon, beta carbon substituent. It is Essential amino acid, essential in humans, meaning that the body cannot synthesize it and it must be obtained from the diet. Tryptophan is also a precursor to the neurotransmitter serotonin, the hormone melatonin, and vitamin B3. It is Genetic code, encoded by the codon UGG. Like other amino acids, tryptophan is a zwitterion at physiological pH where the amino group is protonated (–; pKa = 9.39) and the carboxylic acid is deprotonation, deprotonated ( –COO−; pKa = 2.38). Humans and many animals cannot synthesize tryptophan: they need to obtain it through their diet, making it an essential amino acid. Function Amino acids, including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phenylalanine
Phenylalanine (symbol Phe or F) is an essential α-amino acid with the formula . It can be viewed as a benzyl group substituted for the methyl group of alanine, or a phenyl group in place of a terminal hydrogen of alanine. This essential amino acid is classified as neutral, and nonpolar because of the inert and hydrophobic nature of the benzyl side chain. The L-isomer is used to biochemically form proteins coded for by DNA. Phenylalanine is a precursor for tyrosine, the monoamine neurotransmitters dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline), and the skin pigment melanin. It is encoded by the codons UUU and UUC. Phenylalanine is found naturally in the milk of mammals. It is used in the manufacture of food and drink products and sold as a nutritional supplement for its analgesic and antidepressant effects. It is a direct precursor to the neuromodulator phenethylamine, a commonly used dietary supplement. As an essential amino acid, phenylalanine is n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Babadağ, Denizli
Babadağ, formerly ''Kadıköy'', is a highland town and district of Denizli Province in the Aegean region of Turkey, reached by a steep, winding road uphill from the town of Sarayköy. It was known in antiquity as Salbacos. Agriculture is hard on this mountainside and thus the people have been making a living from stitching clothing in Babadağ for a long time, and others have migrated to Denizli, İzmir and Istanbul. Thus this is the hometown of many of Denizli's successful traders and textile entrepreneurs. ''Babadağ dollar'' is Denizli slang for the expression ''my word is my bond''. There are still active workshops in the town, which is also a popular mountain summer holiday location. The area is characterized by the existence of geological fault zones, which have contributed in the past to the occurrence of many landslides. There was also a high risk of landslides in town, which led the government to evacuate Gündoğdu, a steeply sloped urban district of Babadağ, in 200 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Bulletin Of Zoological Nomenclature
The International Commission on Zoological Nomenclature (ICZN) is an organization dedicated to "achieving stability and sense in the scientific naming of animals". Founded in 1895, it currently comprises 26 commissioners from 20 countries. Organization The ICZN is governed by the "Constitution of the ICZN", which is usually published together with the ICZN Code. Members are elected by the Section of Zoological Nomenclature, established by the International Union of Biological Sciences (IUBS). The regular term of service of a member of the Commission is six years. Members can be re-elected up to a total of three full six-year terms in a row. After 18 continuous years of elected service, a break of at least three years is prescribed before the member can stand again for election. Activities Since 2014, the work of the Commission is supported by a small secretariat based at the National University of Singapore, in Singapore. Previously, the secretariat was based in London and fun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Commission On Zoological Nomenclature
The International Commission on Zoological Nomenclature (ICZN) is an organization dedicated to "achieving stability and sense in the scientific naming of animals". Founded in 1895, it currently comprises 26 commissioners from 20 countries. Organization The ICZN is governed by the "Constitution of the ICZN", which is usually published together with the ICZN Code. Members are elected by the Section of Zoological Nomenclature, established by the International Union of Biological Sciences (IUBS). The regular term of service of a member of the Commission is six years. Members can be re-elected up to a total of three full six-year terms in a row. After 18 continuous years of elected service, a break of at least three years is prescribed before the member can stand again for election. Activities Since 2014, the work of the Commission is supported by a small secretariat based at the National University of Singapore, in Singapore. Previously, the secretariat was based in London and fu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bromius (beetle)
''Bromius obscurus'', the western grape rootworm, is a species of beetle in the leaf beetle family. It is the only member of the genus ''Bromius''. The distribution of the species is holarctic; it can be found in North America, wide parts of Europe, and Asia. The species is a known pest of grape vines in Europe and western North America. Etymology The genus is named after Bromius, an epithet of the Greek god Dionysus. Taxonomic history ''Bromius obscurus'' was first described as ''Chrysomela obscura'' by Carl Linnaeus in his 1758 10th edition of ''Systema Naturae''. In 1836, the genus ''Bromius'' was first established by Louis Alexandre Auguste Chevrolat in Dejean's ''Catalogue des Coléoptères'', including Linnaeus's ''Chrysomela obscura'' as well as the species ''Eumolpus hirtus'' (now in '' Trichochrysea'') and ''Cryptocephalus vitis'' (now a synonym of ''Bromius obscurus''). In 1837, William Kirby established the name ''Adoxus'' (derived from the Greek for "inglorious" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pierre André Latreille
Pierre André Latreille (; 29 November 1762 – 6 February 1833) was a French zoologist, specialising in arthropods. Having trained as a Roman Catholic priest before the French Revolution, Latreille was imprisoned, and only regained his freedom after recognising a rare beetle species he found in the prison, ''Necrobia ruficollis''. He published his first important work in 1796 (), and was eventually employed by the . His foresighted work on arthropod systematics and taxonomy gained him respect and accolades, including being asked to write the volume on arthropods for George Cuvier's monumental work, , the only part not by Cuvier himself. Latreille was considered the foremost entomologist of his time, and was described by one of his pupils as "the prince of entomologists". Biography Early life Pierre André Latreille was born on 29 November 1762 in the town of Brive, then in the province of Limousin, as the illegitimate child of Jean Joseph Sahuguet d'Amarzit, général ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pierre Nicolas Camille Jacquelin Du Val
Pierre Nicolas Camille Jacquelin Du Val (9 July 1828, Prades, Pyrénées-Orientales – 5 July 1862, Clamart) was a French entomologist who specialised in Coleoptera. After he went to Paris in order to begin medical studies, he met Alexandre Laboulbène, who introduced him to entomology. The paradox is that Laboulbène became a famous physician, and Jacquelin left medicine to concentrate on entomology. After minor preliminary works, he conceived together with the miniaturist painter Jules Migneaux (1825-1898) a vast project describing and illustrating all European genera of beetles. There was the ''Genera des coléoptères d’Europe'', which started to get published in 1854, one of the most remarkable European book on beetles, due to the quality of its text, and especially to its magnificent illustrations, whose beauty and accuracy were never surpassed. Unfortunately, he died at 34, leaving unfinished his work which was brought to an end by the prolific author Léon Fairmaire (182 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
