Evaluation of dihydroquercetin-3-O-glucoside from Malbec grapes as copigment of malvidin-3-O-glucoside
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چکیده
منابع مشابه
Enzymatic synthesis of [3'-O-methyl-(3)H]malvidin-3-glucoside from petunidin-3-glucoside.
Malvidin-3-glucoside has been labeled by enzymatic synthesis in a single-step experiment. Catechol-O-methyl transferase catalyzed the B-ring methylation of petunidin-3-glucoside, and S-Adenosyl-L-[methyl-(3)H] methionine was the methyl donor. Solid phase extraction and preparative high-performance liquid chromatography were necessary to separate [3'-O-methyl-(3)H]malvidin-3-glucoside from an is...
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A method for the determination of malvidin 3-O-glucoside (Oenin), and malvidin 3, 5-O-diglucoside (Malvin) in wines by on line HPLC coupled with UV, and fluorescence detectors is described. With the proposed method the samples were analysed by direct injection without a previous treatment. For method validation, satisfactory recoveries (> 95%) and suitable repeatabilities (within day: R.S.D. (n...
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Anthocyanins (ACNs) are plant secondary metabolites from the flavonoid family. Red to blue fruits are major dietary sources of ACNs (up to 1 g/100 g FW), being cyanidin-3-O-glucoside (Cy3G) one of the most widely distributed. Cy3G confers a red hue to fruits, but its content in raspberries and strawberries is low. It has a good radical scavenging capacity (RSC) against superoxide but not hydrox...
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In the present research, the copigmentations of malvidin-3-O-glucoside with five hydroxybenzoic cofactors (p-hydroxybenzoic acid, protocatechuic acid, gallic acid, vanillic acid, and syringic acid) were investigated. The influence of the concentration of these cofactors and the reaction temperature was examined. The equilibrium constant (K), stoichiometric ratio (n) and the thermodynamic parame...
متن کاملNew benzophenone O-glucoside from Hypericum ellipticum.
Examination of the acetone extract of the aerial parts of Hypericum ellipticum afforded a new acetylated benzophenone glucoside (3'-O-beta-D-3",4",6"-triacetylglucopyranosyl-2,4,5',6-tetrahydroxybenzophenone) together with catechin and epicatechin. The structure of the benzophenone glucoside was determined by 2D NMR spectroscopic data. The compound inhibited the proliferation of CNS tumor cell ...
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ژورنال
عنوان ژورنال: Food Chemistry
سال: 2015
ISSN: 0308-8146
DOI: 10.1016/j.foodchem.2014.11.123