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Quercetagetin
Quercetagetin is a flavonol, a type of flavonoid. It can be found in the genus ''Eriocaulon ''Eriocaulon'' is a genus of about 400 species commonly known as pipeworts, of monocotyledonous flowering plants in the family Eriocaulaceae. The genus is widely distributed, with the centers of diversity for the group occurring in tropical regio ...''. Glycosides Quercetagetin-6-O-β-D-glucopyranoside from '' Tagetes mandonii''. References Flavonols Catechols Pyrogallols {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patuletin
Patuletin is an O-methylated flavonol. It can be found in the genus ''Eriocaulon''. Glycosides Patuletin glycosides can be found in ''Ipomopsis aggregata''. Patuletin-3-O-rutinoside can be isolated from the aerial parts of ''Echinacea angustifolia''. Patuletin acetylrhamnosides can be isolated from ''Kalanchoe brasiliensis ''Kalanchoe brasiliensis'', the , saião, folha-da-costa or coerama, is a plant species in the genus ''Kalanchoe ''Kalanchoe'' , also written ''Kalanchöe'' or ''Kalanchoë'', is a genus of about 125 species of tropical, succulent plants in t ...''. References O-methylated flavonols {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flavonol
Flavonols are a class of flavonoids that have the 3-hydroxyflavone backbone (IUPAC name : 3-hydroxy-2-phenylchromen-4-one). Their diversity stems from the different positions of the phenolic -OH groups. They are distinct from flavanols (with "a") such as catechin, another class of flavonoids. Flavonols are present in a wide variety of fruits and vegetables. In Western populations, estimated daily intake is in the range of 20–50 mg per day for flavonols. Individual intake varies depending on the type of diet consumed. The phenomenon of dual fluorescence (due to excited state intramolecular proton transfer or ESIPT) is induced by tautomerism of flavonols (and glucosides) and could contribute to plant UV protection and flower colour. Besides being a subclass of flavonoids, flavonols are suggested by a study of cranberry juice to play a role along with proanthocyanidins, in the juice's ability to block bacterial adhesion, demonstrated by the compressing the fimbria of ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eriocaulon
''Eriocaulon'' is a genus of about 400 species commonly known as pipeworts, of monocotyledonous flowering plants in the family Eriocaulaceae. The genus is widely distributed, with the centers of diversity for the group occurring in tropical regions, particularly southern Asia and the Americas. A few species extend to temperate regions, with ca. 10 species in the United States, mostly in the southern states from California to Florida, and only two species in Canada; China has 35 species, also mostly southern. Only one species (''E. aquaticum'') occurs in Europe, where it is confined to the Atlantic Ocean coasts of Scotland and Ireland; this species also occurs in eastern North America and is thought to be a relatively recent natural colonist in Europe. In the Americas, ''Eriocaulon'' is the only genus in its family that occurs north of Florida. They tend to be associated with wet soils, many growing in shallow water, in wetlands, or in wet savannas like flatwoods. In wet soils, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edgar Charles Bate-Smith
Edgar Charles Bate-Smith (1900-1989Practical Polyphenolics, Edwin Haslam, 1998, ) was an English chemist and phytochemist specialising in food chemistry. He worked in the Low Temperature Research Station in Cambridge where his main fields of research were meat and polyphenols. The discovery in 1943 by Martin and Synge of paper chromatography provided for the first time the means of surveying the phenolic constituents of plants and for their separation and identification. There was an explosion of activity in this field after 1945, none more so than that of Bate-Smith and Tony Swain (chemist), Tony Swain. In 1951, Bate-Smith developed and first described a coloration method to detect the presence of condensed tannins (also called proanthocyanidins) in plant materials. This reaction is based on heating in acidic conditions and gives rise to anthocyanidin pigments. Bate-smith recommended the use of the Forestal solvent for the isolation of leuco-anthocyanins in 1954. In 1973, he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeffrey Harborne
Jeffrey Barry Harborne FRS (1 September 1928, in Bristol – 21 July 2002) was a British chemist who specialised in phytochemistry. He was Professor of Botany at the University of Reading, 1976–93, then Professor emeritus. He contributed to more than 40 books and 270 research papers and was a pioneer in ecological biochemistry, particularly in the complex chemical interactions between plants, microbes and insects. Education Harborne was educated at Wycliffe College, Stonehouse, Gloucestershire and the University of Bristol, where he graduated in chemistry in 1949. He earned a PhD in 1953 with a thesis on the naturally occurring oxygen heterocyclic compounds with Professor Wilson Baker (1900–2002). Research Between 1953 and 1955 he worked as a postdoc with Professor Theodore Albert Geissman at the University of California, Los Angeles, studying phenolic plant pigments, including anthocyanins. The identification of these substances, he made use of ultraviolet-visible spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tagetes Mandonii
''Tagetes mandonii'' is a Bolivian species of marigolds in the family Asteraceae. It is native to La Paz Department and Cochabamba Department in Bolivia. ''Tagetes mandonii'' is an erect herb with opposite leaves. Stem is thin. Leaves are highly dissected. Flower heads are yellow, each containing 6 ray florets and 11 disc floret The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...s. description in Latin, commentary in German References mandonii< ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flavonols
Flavonols are a class of flavonoids that have the 3-hydroxyflavone backbone (IUPAC name : 3-hydroxy-2-phenylchromen-4-one). Their diversity stems from the different positions of the phenols, phenolic hydroxyl, -OH groups. They are distinct from flavanols (with "a") such as catechin, another class of flavonoids. Flavonols are present in a wide variety of fruits and vegetables. In Western populations, estimated daily intake is in the range of 20–50 mg per day for flavonols. Individual intake varies depending on the type of diet consumed. The phenomenon of dual fluorescence (due to excited state intramolecular proton transfer or ESIPT) is induced by tautomerism of flavonols (and glucosides) and could contribute to plant UV protection and flower colour. Besides being a subclass of flavonoids, flavonols are suggested by a study of cranberry juice to play a role along with proanthocyanidins, in the juice's ability to block bacterial adhesion, demonstrated by the compressing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catechols
Catechol ( or ), also known as pyrocatechol or 1,2-dihydroxybenzene, is a toxic organic compound with the molecular formula . It is the ''ortho'' isomer of the three isomeric benzenediols. This colorless compound occurs naturally in trace amounts. It was first discovered by destructive distillation of the plant extract catechin. About 20,000 tonnes of catechol are now synthetically produced annually as a commodity organic chemical, mainly as a precursor to pesticides, flavors, and fragrances. Catechol occurs as feathery white crystals that are very rapidly soluble in water. Isolation and synthesis Catechol was first isolated in 1839 by Edgar Hugo Emil Reinsch (1809–1884) by distilling it from the solid tannic preparation catechin, which is the residuum of catechu, the boiled or concentrated juice of ''Mimosa catechu'' (''Acacia catechu''). Upon heating catechin above its decomposition point, a substance that Reinsch first named ''Brenz-Katechusäure'' (burned catechu acid) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
