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Uncaria Rhynchophylla
''Uncaria rhynchophylla'' () or the cat's claw herb is a plant species used in traditional Chinese medicine. (+)-Catechin and (-)-epicatechin are found in the plant as well as the alkaloid rhynchophylline Rhynchophylline is an alkaloid found in certain ''Uncaria'' species (Rubiaceae), notably '' Uncaria rhynchophylla'' and '' Uncaria tomentosa''. It also occurs in the leaves of ''Mitragyna speciosa'' (kratom), a tree native to Thailand. Chemicall .... References External links * rhynchophylla Plants used in traditional Chinese medicine {{Cinchonoideae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friedrich Anton Wilhelm Miquel
Friedrich Anton Wilhelm Miquel (24 October 1811 – 23 January 1871) was a Dutch botanist, whose main focus of study was on the flora of the Dutch East Indies. Early life Miquel was born in Neuenhaus and studied medicine at the University of Groningen, where, in 1833, he received his doctorate. After starting work as a doctor at the Buitengasthuis Hospital in Amsterdam, in 1835, he taught medicine at the clinical school in Rotterdam. In 1838 he became correspondent of the Royal Institute, which later became the Royal Netherlands Academy of Arts and Sciences, and in 1846 he became member. He was professor of botany at the University of Amsterdam (1846–1859) and Utrecht University (1859–1871). He directed the Rijksherbarium (National Herbarium) at Leiden from 1862. In 1866, he was elected a foreign member of the Royal Swedish Academy of Sciences. Research Miquel did research on the taxonomy of plants. He was interested in the flora of the Dutch Empire, specifically the Dutch E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Jackson (botanist)
George Jackson (1780–1811) was an English botanist and author. He was born in Aberdeen in 1780 and was later in charge of A.B. Lambert's herbarium. On 2 February 1808 he was elected a Fellow of the Linnean Society and made important contributions to the Henry Cranke Andrews publication ''The Botanist's Repository''. He formally described the genus ''Ormosia'', publishing the description in ''Transactions of the Linnean Society''. Jackson died on 12 January 1811 aged 31. In the same year Robert Brown named a genus of leguminous A legume () is a plant in the family Fabaceae (or Leguminosae), or the fruit or seed of such a plant. When used as a dry grain, the seed is also called a pulse. Legumes are grown agriculturally, primarily for human consumption, for livestock fo ... plants '' Jacksonia'' in his honour. James Edward Smith, in Rees's ''Cyclopædia noted - * "''Jacksonia'', so named by Mr. Robert Brown, in memory of the late Mr. George Jackson, F.L.S., a man of the mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1897 In Science
The year 1897 in science and technology involved some significant events, listed below. Chemistry * April 30 – J. J. Thomson first describes his discovery of the electron, in England. Earth sciences * June 12 – 1897 Assam earthquake of magnitude of 8.0 rocks Assam, India, killing over 1,500 people. History of science and technology * Adolf Erik Nordenskiöld publishes ''Periplus: An Essay on the Early History of Charts and Sailing Directions'' in Stockholm. * Boulton and Watt's Smethwick Engine of 1779 (superseded 1892) is dismantled for preservation by the Birmingham Canal Navigations company, initially at its Ocker Hill depot in the West Midlands of England. Mathematics * David Hilbert unifies the field of algebraic number theory with his treatise ''Zahlbericht''. * John Edward Campbell originates the Baker–Campbell–Hausdorff formula for multiplication of exponentials in Lie algebras. * Raoul Bricard investigates and classifies flexible polyhedra, defining the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncaria Rhynchophylla Kagikzr02
''Uncaria'' is a genus of flowering plants in the family Rubiaceae. It has about 40 species.''Uncaria'' At: World Checklist of Rubiaceae At: Kew Gardens Website. (see ''External links'' below). Their distribution is pantropical, with most species native to tropical Asia, three from Africa and the Mediterranean and two from the neotropics.David J. Mabberley. 2008. ''Mabberley's Plant-Book'' third edition (2008). Cambridge University Press: UK. They are known colloquially as gambier, cat's claw or uña de gato. The latter two names are shared with several other plants. The type species for the genus is ''Uncaria guianensis''.''Uncaria'' In: Index Nominum Genericorum. In: Regnum Vegetabile (see ''External links'' below). Indonesian Gambier ('' U. gambir'') is a large tropical vine with leaves typical of the genus, being opposite and about long. The South American ''U. tomentosa'' is called Uña de Gato. ''Uncaria sinensis'' is common in China. ''Uncaria'' was named in 1789 by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catechin
Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids. The name of the catechin chemical family derives from '' catechu'', which is the tannic juice or boiled extract of ''Mimosa catechu'' ('' Acacia catechu'' L.f). Chemistry Catechin possesses two benzene rings (called the A- and B-rings) and a dihydropyran heterocycle (the C-ring) with a hydroxyl group on carbon 3. The A-ring is similar to a resorcinol moiety while the B-ring is similar to a catechol moiety. There are two chiral centers on the molecule on carbons 2 and 3. Therefore, it has four diastereoisomers. Two of the isomers are in trans configuration and are called ''catechin'' and the other two are in cis configuration and are called ''epicatechin''. The most common catechin isomer is (+)-catechin. The other stereoisomer is (-)-catechin or ''ent''-catechin. The most common epicatechin isomer is (-)-epic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchophylline
Rhynchophylline is an alkaloid found in certain '' Uncaria'' species (Rubiaceae), notably ''Uncaria rhynchophylla'' and '' Uncaria tomentosa''. It also occurs in the leaves of ''Mitragyna speciosa'' (kratom), a tree native to Thailand. Chemically, it is related to the alkaloid mitragynine. Rhynchophylline is a non-competitive NMDA antagonist (IC50 = 43.2 μM) and a calcium channel blocker. '' Uncaria'' species have had a variety of uses in traditional herbal medicine, such as for lightheadedness, convulsions, numbness, and hypertension. These uses have been associated with the presence of rhynchophylline and have encouraged its investigation as a drug candidate for several cardiovascular and central nervous system diseases; however, few clinically relevant studies have been conducted. See also * Ibotenic acid *Mitragynine pseudoindoxyl Mitragynine pseudoindoxyl is a rearrangement product of 7-hydroxymitragynine. It is an analgesic being more potent than morphine. Pharm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncaria
''Uncaria'' is a genus of flowering plants in the family Rubiaceae. It has about 40 species.''Uncaria'' At: World Checklist of Rubiaceae At: Kew Gardens Website. (see ''External links'' below). Their distribution is pantropical, with most species native to tropical Asia, three from Africa and the Mediterranean and two from the neotropics.David J. Mabberley. 2008. ''Mabberley's Plant-Book'' third edition (2008). Cambridge University Press: UK. They are known colloquially as gambier, cat's claw or uña de gato. The latter two names are shared with several other plants. The type species for the genus is ''Uncaria guianensis''.''Uncaria'' In: Index Nominum Genericorum. In: Regnum Vegetabile (see ''External links'' below). Indonesian Gambier ('' U. gambir'') is a large tropical vine with leaves typical of the genus, being opposite and about long. The South American ''U. tomentosa'' is called Uña de Gato. ''Uncaria sinensis'' is common in China. ''Uncaria'' was named in 1789 by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
