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Malvidin
Malvidin is an O-methylated anthocyanidin, the 3',5'-methoxy derivative of delphinidin. As a primary plant pigment, its glycosides are highly abundant in nature. Natural occurrences Malvidin is responsible for the blue color found in petals of the '' Primula'' plants of the ''polyanthus'' group. Blue flowers of the blue pimpernel (''Anagallis monelli'') have also a higher concentration of malvidin. It is responsible primarily for the color of red wine, ''Vitis vinifera'' being one of its sources. It is also present in other berries, such as blueberries ('' Vaccinium corymbosum'') or the saskatoon berries ('' Amelanchier alnifolia''). Chemistry Slightly acidic and neutral solutions of malvidin are characteristically of a red color, while basic solutions of malvidin yield a blue color. The breakdown of malvidin releases syringic acid. Use as a marker in archaeology The breakdown of malvidin releases syringic acid Syringic acid is a naturally occurring phenolic compo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malvidin 3-rutinoside
Malvidin is an O-methylated anthocyanidin, the 3',5'-methoxy derivative of delphinidin. As a primary plant pigment, its glycosides are highly abundant in nature. Natural occurrences Malvidin is responsible for the blue color found in petals of the ''Primula'' plants of the ''polyanthus'' group. Blue flowers of the blue pimpernel (''Anagallis monelli'') have also a higher concentration of malvidin. It is responsible primarily for the color of red wine, ''Vitis vinifera'' being one of its sources. It is also present in other berries, such as blueberries (''Vaccinium corymbosum'') or the saskatoon berries (''Amelanchier alnifolia''). Chemistry Slightly acidic and neutral solutions of malvidin are characteristically of a red color, while basic solutions of malvidin yield a blue color. The breakdown of malvidin releases syringic acid. Use as a marker in archaeology The breakdown of malvidin releases syringic acid as revealed in the examination of jars containing shedeh, a d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oenin
Oenin is an anthocyanin. It is the 3- glucoside of malvidin. It is one of the red pigments found in the skin of purple grapes and in wine. Color stabilization of malvidin 3-glucoside at a higher pH can be explained by self-aggregation of the flavylium cation and copigmentation with the Z-chalcone form. In the presence of procyanidin C2, the red color of oenin appears more stable. However, the HPLC chromatogram shows a decrease in the amplitude of the peaks of oenin and procyanidin C2. Concomitantly, a new peak appears with a maximal absorption in the red region. This newly formed pigment probably comes from the condensation of oenin and procyanidin C2. Malvidin 3-glucoside alone is not oxidized in the presence of grape polyphenol oxidase, whereas it is degraded in the presence of a crude grape PPO extract and of caftaric acid forming anthocyanidin-caftaric acid adducts. See also * Phenolic compounds in wine * Wine color * Malvidin glucoside-ethyl-catechin * Anthocyanone A A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malvin
Malvin is a naturally occurring chemical of the anthocyanin family. Malvin reacts in the presence of H2O2 to form malvone. The ortho-benzoyloxyphenylacetic acid esters reaction product is dependant of the pH: it is obtained under acidic conditions whereas under neutral conditions, the reaction product is the 3-O-acyl-glucosyl-5-O-glucosyl-7-hydroxy coumarin. Natural occurrences It is a diglucoside of malvidin mainly found as a pigment in herbs like Malva (''Malva sylvestris''), ''Primula'' and ''Rhododendron''. ''M. sylvestris'' also contains malonylmalvin (malvidin 3-(6″-malonylglucoside)-5-glucoside).Malonated anthocyanins in malvaceae: Malonylmalvin from Malva sylvestris. Kosaku Takeda, Shigeki Enoki, Jeffrey B. Harborne and John Eagles, Phytochemistry, 1989, Volume 28, Issue 2, Pages 499–500, The characteristic floral jade coloration of '' Strongylodon macrobotrys'' has been shown to be an example of copigmentation, a result of the presence of malvin and saponarin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anagallis Monelli
''Lysimachia monelli'', the blue pimpernel or garden pimpernel (formerly known as ''Anagallis monelli'') is a species of flowering plant in the family Primulaceae, native to the Mediterranean region. It is not to be confused with ''Lysimachia foemina'', which has very similar blue flowers, but broader leaves and can be found also in colder climates. In a comparison of DNA sequences, ''L. monelli'' was shown to be most closely related to ''L. foemina''. The latter had been thought by many to be closest to '' L. arvensis'', and some authors had even included ''L. foemina'' as a subspecies of ''L. arvensis''. The three species were among several transferred from ''Anagallis'' to ''Lysimachia'' in a 2009 paper. ''Lysimachia monelli'' is a low-growing perennial with trailing stems. Wild specimens have blue or orange coloured flowers and are not sympatric with the blue-flowered plants growing natively in southern Spain and the orange in Morocco and southern Italy. A red variant was als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O-methylated Anthocyanidin
The O-methylated flavonoids or methoxyflavonoids are flavonoids with methylations on hydroxyl groups (methoxy bonds). O-methylation has an effect on the solubility of flavonoids. Enzymes O-methylated flavonoids formation implies the presence of specific O-methyltransferase (OMT) enzymes which accept a variety of substrates. Those enzymes mediate the O-methylation on a specific hydroxyl group, like on 4' (example in ''Catharanthus roseus'') or 3' (example in rice) positions. Those positions can be ortho, meta, para and there can be a special 3-O-methyltransferase for the 3-OH position. Calamondin orange ('' Citrus mitis'') exhibits all of those activities. Plant enzymes * Apigenin 4'-O-methyltransferase * 8-hydroxyquercetin 8-O-methyltransferase * Isoflavone 4'-O-methyltransferase * Isoflavone 7-O-methyltransferase * Isoliquiritigenin 2'-O-methyltransferase * Isoorientin 3'-O-methyltransferase * Kaempferol 4'-O-methyltransferase * Luteolin O-methyltransferase * Methylquercetageti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Areni-1 Winery
The Areni-1 winery is an ancient winery that was discovered in 2007 in the Areni-1 cave complex in the village of Areni in the Vayots Dzor province of Armenia by a team of Armenian and Irish archaeologists. The excavations were carried out by Boris Gasparyan of the Institute of Archaeology and Ethnography of the National Academy of Sciences of Armenia and Ron Pinhasi from University College Cork (Ireland), and were sponsored by the Gfoeller Foundation (USA) and University College Cork. In 2008 the University of California, Los Angeles (UCLA) also joined the project with Gregory Areshian as co-director of the Areni Project. Since then the excavations have been sponsored by UCLA and the National Geographic Society as well. The excavations of the winery were completed in 2010. The winery consists of fermentation vats, a wine press, storage jars, pottery sherds, and is believed to be at least a thousand years older than the winery unearthed in the West Bank in 1963, which is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shedeh
Shedeh was a drink of ancient Egypt. Although it was long thought to have been made from pomegranates, recent evidence suggests it came from red grapes. History The name Shedeh appeared inscribed on the labels of Egyptian two-handled pottery amphorae at the site of el-Amarna and belonging to the reign of Akhenaten, late XVIII Dynasty. Its name showed it was a beverage different from the traditional (grape)wine, whose Egyptian name was ''irep''. An example of the importance of Shedeh in ancient Egyptian times was the fact that it was cited in the Egyptian romantic poetry, where Shedeh was associated with a lover’s voice. During the Ramesside (1292–1075 BC) and Ptolemaic (305–30 BC) periods, the Shedeh drink was recorded on temple inscriptions, and used as a religious offering as well as for embalming. Discovery In 2006, a team of Spanish scientists led by Maria Rosa Guasch-Jané developed a new method of identifying an acid left by compounds in red wine. The evidence was c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syringic Acid
Syringic acid is a naturally occurring phenolic compound and dimethoxybenzene that is commonly found as a plant metabolite. Natural occurrence Syringic acid can be found in several plants including '' Ardisia elliptica'' and ''Schumannianthus dichotomus''. Synthesis Syringic acid can be prepared by selectively hydrolyzing ( demethylating) eudesmic acid with 20% sulfuric acid. Presence in food Syringic acid can be found in several fruits including olives, dates, spices, pumpkin, grapes, acai palm, honey, red wine, among others. Its presence in the ancient Egyptian drink shedeh could confirm it was made out of grape, as syringic acid is released by the breakdown of the compound malvidin, also found in red wine. It is also found in vinegar. Applications Various studies have found syringic acid to exhibit useful pharmaceutical properties such as anti-oxidant, anti-microbial, anti-inflammation, anti-cancer, and anti-diabetic. Syringic acid can be enzymatically pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amelanchier Alnifolia
''Amelanchier alnifolia'', the Saskatoon berry, Pacific serviceberry, western serviceberry, western shadbush, or western juneberry, is a shrub with an edible berry-like fruit, native to North America. Description It is a deciduous shrub or small tree that most often grows to , rarely to , in height. Its growth form spans from suckering and forming colonies to clumped. The leaves are oval to nearly circular, long and broad, on a leaf stem, margins toothed mostly above the middle. As with all species in the genus '' Amelanchier'', the flowers are white, with five quite separate petals and five sepals. In ''A. alnifolia'', they are about across, with 20 stamens and five styles, appearing on short racemes of 3–20, somewhat crowded together, blooming from April to July. The fruit is a small purple pome in diameter, ripening in early summer in the coastal areas and late summer further inland. Resembling blueberries, it has a waxy bloom. Serviceberries are relatively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Primulin (flavonoid)
Primulin is an anthocyanin. It is the 3-galactoside of malvidin Malvidin is an O-methylated anthocyanidin, the 3',5'-methoxy derivative of delphinidin. As a primary plant pigment, its glycosides are highly abundant in nature. Natural occurrences Malvidin is responsible for the blue color found in petals .... It can be found in '' Primula sinensis''. The first crystalline form of this pigment was prepared by Rose Scott-Moncrieff in about 1930. This was the first crystalline anthrocyanine pigment ever identified. This was possible because of her insight into linking genetics with chemistry. Cathie Martin, April 2016, Biochemical classics, Biochemist.org, Retrieved 5 July 2016 References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curcuma Alismatifolia
''Curcuma alismatifolia'', Siam tulip or summer tulip ( th, ปทุมมา, ; , ; , ) is a tropical plant native to Laos, northern Thailand, and Cambodia. Despite its name, it is not related to the tulip, but to the various ginger species such as turmeric Turmeric () is a flowering plant, ''Curcuma longa'' (), of the ginger family, Zingiberaceae, the rhizomes of which are used in cooking. The plant is a perennial, rhizomatous, herbaceous plant native to the Indian subcontinent and Southeast .... It can grow as an indoor plant, and is also sold as a cut flower. One of the most famous wild fields of Siam tulips is in Pa Hin Ngam National Park in Chaiyaphum Province, Thailand. Malvidin 3-rutinoside is a pigment responsible for bract color in ''C. alismatifolia''. References alismatifolia Flora of Cambodia Flora of Laos Flora of Thailand Plants described in 1903 {{Zingiberales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acylated Malvidin 3-rutinoside
In chemistry, acylation (or alkanoylation) is the chemical reaction in which an acyl group () is added to a compound. The compound providing the acyl group is called the acylating agent. Because they form a strong electrophile when treated with some metal catalysts, acyl halides are commonly used as acylating agents. For example, Friedel–Crafts acylation uses acetyl chloride (ethanoyl chloride or ) as the agent and aluminum chloride () as a catalyst to add an ethanoyl (acetyl) group to benzene: The mechanism of this reaction is electrophilic aromatic substitution. Acyl halides and acid anhydrides of carboxylic acids are also commonly used acylating agents. In some cases, active esters exhibit comparable reactivity. All react with amines to form amides and with alcohols to form esters by nucleophilic acyl substitution. Acylation can be used to prevent rearrangement reactions that would normally occur in alkylation. To do this an acylation reaction is performed, then the car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
