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Proanthocyanin
Condensed tannins (proanthocyanidins, polyflavonoid tannins, catechol-type tannins, pyrocatecollic type tannins, non-hydrolyzable tannins or flavolans) are polymers formed by the condensation of flavans. They do not contain sugar residues. They are called proanthocyanidins as they yield anthocyanidins when depolymerized under oxidative conditions. Different types of condensed tannins exist, such as the procyanidins, propelargonidins, prodelphinidins, profisetinidins, proteracacinidins, proguibourtinidins or prorobinetidins. All of the above are formed from flavan-3-ols, but flavan-3,4-diols, called (leucoanthocyanidin) also form condensed tannin oligomers, e.g. leuco-fisetinidin form profisetinidin, and flavan-4-ols form condensed tannins, e.g. 3',4',5,7-flavan-4-ol form proluteolinidin (luteoforolor). One particular type of condensed tannin, found in grape, are procyanidins, which are polymers of 2 to 50 (or more) catechin units joined by carbon-carbon bonds. These are not s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schematic Condensed Tannins
A schematic, or schematic diagram, is a designed representation of the elements of a system using abstract, graphic symbols rather than realistic pictures. A schematic usually omits all details that are not relevant to the key information the schematic is intended to convey, and may include oversimplified elements in order to make this essential meaning easier to grasp, as well as additional organization of the information. For example, a subway map intended for passengers may represent a subway station with a dot. The dot is not intended to resemble the actual station at all but aims to give the viewer information without unnecessary visual clutter. A schematic diagram of a chemical process uses symbols in place of detailed representations of the vessels, piping, valves, pumps, and other equipment that compose the system, thus emphasizing the functions of the individual elements and the interconnections among them and suppresses their physical details. In an electronic circuit d ... [...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 chirality (chemistry), chiral centers on the molecule on carbons 2 and 3. Therefore, it has four diastereoisomers. Two of the isomers are in trans configuration, ''trans'' configuration and are called ''catechin'' and the other two are in cis configuration, ''cis'' configuration and are called ''epicatechin''. The most common catechin isomer is (+)-catechin. The other stereoisomer is (−)-catechin or ''en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitis Vinifera
''Vitis vinifera'', the common grape vine, is a species of flowering plant, native to the Mediterranean Basin, Mediterranean region, Central Europe, and southwestern Asia, from Morocco and Portugal north to southern Germany and east to northern Iran. , there were between List of grape varieties, 5,000 and 10,000 varieties of ''Vitis vinifera'' grapes though only a few are of commercial significance for wine and table grape production. The wild grape is often classified as ''Vitis vinifera'' ''sylvestris'' (in some classifications considered ''Vitis sylvestris''), with ''Vitis vinifera'' ''vinifera'' restricted to cultivated forms. Domesticated vines have hermaphrodite#Plants, hermaphrodite flowers, but ''sylvestris'' is plant sexuality, dioecious (male and female flowers on separate plants) and pollination is required for fruit to develop. Grapes can be eaten fresh or dried to produce raisins, Sultana (grape)#Raisins, sultanas, and Zante currant, currants. Grape leaves are used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grape Seed Extract
Grape seed extract is an industrial derivative of whole grape seeds. The extract (GSPE) contains proanthocyanidins. Grape seed extract quality is measured by the content of procyanidins which are formed from proanthocyanidins. Generally, grape seed extract quality contains 95% procyanidins, but potency varies among products. Eating foods or beverages high in procyanidin results in an astringent sensation in the mouth. Extraction method The properties of grape seed extract depend on the extraction process used to obtain it and how the grapes were grown. The classic method incorporates extraction with organic solvents such as acetone, acetonitrile, ethyl acetate, and methanol. Other methods using hot water have been used, but they are not as effective at maximizing extract production in both quantity and efficiency. High performance liquid chromatography seems to be the most effective analysis along with proton NMR spectroscopy with principal component analysis to ensure accurate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia Mollissima
''Acacia mearnsii'', commonly known as black wattle, late black wattle or green wattle, is a species of flowering plant in the family Fabaceae and is endemic to south-eastern Australia. It is usually an erect tree with smooth bark, bipinnate leaves and spherical heads of fragrant pale yellow or cream-coloured flowers followed by black to reddish brown pods. In some other parts of the world, it is regarded as an invasive species. Description ''Acacis mearnsii'' is a spreading shrub or erect tree that typically grows to a height of and has smooth bark, sometimes corrugated at the base of old specimens. The leaves are bipinnate with 7 to 31 pairs of pinnae, each with 25 to 78 pairs of pinnules. There is a spherical gland up to below the lowest pair of pinnae. The scented flowers are arranged in spherical heads of 20 to 40, pale yellow or cream-coloured, with the heads on hairy peduncles long. Flowering mainly occurs from October to December and black to reddish-brown pods, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schinopsis Lorentzii
''Schinopsis lorentzii'' is a species of flowering plant in the family ''Anacardiaceae''. It is a hardwood tree known as red quebracho, native of the Paraguayan subtropical area, which forms forests in Gran Chaco region of Argentina, in Paraguay, and Bolivia. Some of its common names are ''coronillo'', ''quebracho Cornillo'' (Brazil), ''quebracho chaqueño'', ''quebracho colorado santiagueño'', ''quebracho macho'', and ''quebracho bolí''. The qualification ''colorado'' ("red") differentiates it from other species of common quebracho tree, the '' Aspidosperma quebracho-blanco'' (''quebracho blanco'', "white quebracho", family Apocynaceae). The indication ''santiagueño'' (from Santiago del Estero) is made to distinguish it from ''quebracho colorado chaqueño'', a closely related species ('' Schinopsis balansae''). It is considered a symbol of the Gran Chaco region. This tree is commercially very important due to its extremely hard and durable wood, and because of its tannin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quebracho Tree
Quebracho is a common name in Spanish language, Spanish to describe very hard (density 0.9–1.3) wood tree species. The etymology of the name derived from ''quiebrahacha'', or ''quebrar hacha'', meaning "axe-breaker". The corresponding English-language term for such hardwoods is breakax or breakaxe. Species There are at least three similar commercially important tree species that grow in the Gran Chaco region of South America. * the quebracho ** ''Schinopsis lorentzii'' (Syn.: ''Schinopsis marginata'' Engl., ''Schinopsis haenkeana'' Engl.); of the family Anacardiaceae; North Argentina, Paraguay and Bolivia; (the red quebracho, quebracho), ''quebracho-colorado santiagueño'', ''red quebracho santiagueño'', ''quebracho santiagueño'' (also known as ''quebracho cor(o)nillo'', ''cor(o)nillo'', ''quebracho macho'', ''quebracho negro'' or ''moro'', ''quebracho rojo'', ''quebracho bolí'', ''horco quebracho'', ''quebracho serrano'', ''quebracho montano'', ''quebracho crespo'', '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant
Plants are the eukaryotes that form the Kingdom (biology), kingdom Plantae; they are predominantly Photosynthesis, photosynthetic. This means that they obtain their energy from sunlight, using chloroplasts derived from endosymbiosis with cyanobacteria to produce sugars from carbon dioxide and water, using the green pigment chlorophyll. Exceptions are parasitic plants that have lost the genes for chlorophyll and photosynthesis, and obtain their energy from other plants or fungi. Most plants are multicellular organism, multicellular, except for some green algae. Historically, as in Aristotle's biology, the plant kingdom encompassed all living things that were not animals, and included algae and fungi. Definitions have narrowed since then; current definitions exclude fungi and some of the algae. By the definition used in this article, plants form the clade Viridiplantae (green plants), which consists of the green algae and the embryophytes or land plants (hornworts, liverworts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commiphora Angolensis
''Commiphora angolensis'', also known as sand commiphora or sand corkwood, is a shrub species in the genus ''Commiphora'' growing mainly in Angola and Namibia Namibia, officially the Republic of Namibia, is a country on the west coast of Southern Africa. Its borders include the Atlantic Ocean to the west, Angola and Zambia to the north, Botswana to the east and South Africa to the south; in the no .... The adults and larvae of '' Diamphidia nigroornata'' feed on ''C. angolensis''. The bark of ''C. angolensis'' contains condensed tannins and the anthocyanin petunidin-3-rhamnoglucoside.Chemical study of bark from ''Commiphora angolensis'' Engl. Cardoso Do Vale, J., Bol Escola Farm Univ Coimbra Edicao Cient, 1962, volume 3, page 128abstract See also * List of Southern African indigenous trees and woody lianes References External links Flora of ZimbabweKew gardenjstorTree Atlas of NamibiaVille de Geneve - CJB - Base de données des plantes d'Afrique (French) a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prunus
''Prunus'' is a genus of flowering plant, flowering trees and shrubs from the family (biology), family Rosaceae. The genus includes plums, cherries, peaches, nectarines, apricots and almonds (collectively Drupe, stonefruit). The genus has a cosmopolitan distribution, being native to the temperate regions of North America, the neotropics of South America, and temperate and tropical regions of Eurasia and Africa, There are about 340 accepted species . Many members of the genus are widely cultivated for their sweet, fleshy fruit and for decorative purposes of their flowers. ''Prunus'' fruit are drupes, or stone fruits. The fleshy Fruit anatomy, mesocarp surrounding the Fruit anatomy, endocarp is edible while the endocarp itself forms a hard, inedible shell called the pyrena ("stone" or "pit"). This shell encloses the seed (or "kernel"), which is edible in some species (such as sweet almonds), but poisonous in many others (such as apricot kernels). Besides being eaten off the hand, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithocarpus Glaber
''Lithocarpus glaber'', the Japanese oak, is a tree species in the genus ''Lithocarpus'' found in Japan, China and Taiwan. Mitami Shrine, a Shinto shrine in Sakai, Osaka Prefecture, Japan, is famous locally for its comparatively large population of Lithocarpus glaber, known as Shiribukagashi (尻深樫 シリブカガシ). In China, it is called ''ke'' (柯). In Cantonese, it is called ''Seklik'' (石櫟). Condensed tannins from ''L. glaber'' leaves have been analysed through acid-catalyzed degradation in the presence of cysteamine and have a potent free radical scavenging activity. See also * ''Quercus crispula ''Quercus crispula'', commonly known as mizunara from the Japanese, is a deciduous broad-leaved tree of the genus ''Quercus''. As ''Quercus mongolica'' var. ''crispula'', it is considered a variety of ''Quercus mongolica, Mongolian oak'' by some ...'' - Japanese oak - 水楢 References External links * glaber Plants described in 1784 {{Fagales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temperate Wood
A temperate forest is a forest found between the tropical and boreal regions, located in the temperate zone. It is the second largest terrestrial biome, covering 25% of the world's forest area, only behind the boreal forest, which covers about 33%. These forests cover both hemispheres at latitudes ranging from 25 to 50 degrees, wrapping the planet in a belt similar to that of the boreal forest. Due to its large size spanning several continents, there are several main types: deciduous, coniferous, mixed forest, and rainforest. Climate The climate of a temperate forest is highly variable depending on the location of the forest. For example, Los Angeles and Vancouver, Canada are both considered to be located in a temperate zone, however, Vancouver is located in a temperate rainforest, while Los Angeles is a relatively dry subtropical climate. Types of temperate forest Deciduous They are found in Europe, East Asia, North America, and in some parts of South America. Deciduous fores ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
