epsilon viniferin/vinska trta

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Effect of lime-induced leaf chlorosis on ochratoxin A, trans-resveratrol, and epsilon-viniferin production in grapevine (Vitis vinifera L.) berries infected by Aspergillus carbonarius.

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Prijava / prijava

Berries of Vitis vinifera L. cv. Merlot, grown on a neutral or calcareous soil, were infected, at phenological phases of veraison and ripening, by a conidial suspension of Aspergillus carbonarius to control ochratoxin A production and trans-resveratrol- and epsilon-viniferin-induced synthesis as

Variability in the Content of Trans-Resveratrol, Trans-ε-Viniferin and R2-Viniferin in Grape Cane of Seven Vitis vinifera L. Varieties during a Three-Year Study.

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Prijava / prijava

Grape canes are a waste product from viticulture that show potential as an industrially extractable source of stilbenes, which are valuable for medical and other purposes. In this work, grape canes collected in three consecutive years (2014-2016) at six different places in South Moravia, Czech

Stilbenes from Vitis vinifera L. Waste: A Sustainable Tool for Controlling Plasmopara Viticola.

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Stilbene-enriched extracts from Vitis vinifera waste (cane, wood, and root) were characterized by UHPLC-MS. Eleven stilbenes were identified and quantified as follows: ampelopsin A, (E)-piceatannol, pallidol, (E)-resveratrol, hopeaphenol, isohopeaphenol, (E)-ε-viniferin, (E)-miyabenol C,

3-Hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase inhibitory effect of Vitis vinifera.

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Activity-guided fractionation of the methanol extract of Vitis vinifera bark led to the isolation of epsilon-viniferin, ampelopcin A, vitisin A and vitisin B. Vitisin A and vitisin B showed a remarkable inhibitory activity against 3-hydroxy-3-methylglutaryl-Coenzyme A (HMG-CoA) reductase with IC50

A new specific BACE-1 inhibitor from the stembark extract of Vitis vinifera.

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A new resveratrol dimer, (+)-vitisinol E (1) which demonstrated inhibitory activity on BACE-1 (beta-site APP-cleaving enzyme 1) in vitro, was isolated from the stembark extract of Vitis vinifera (Vitaceae) together with four known resveratrol oligomers, (+)-epsilon-viniferin (2), (+)-ampelopsin A

Preparative purification of antiamyloidogenic stilbenoids from Vitis vinifera (Chardonnay) stems by centrifugal partition chromatography.

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Five stilbenoids, E-resveratrol, E-piceatannol, (+) E-(epsilon)-viniferin, (+)-ampelopsin A and vitisin C were isolated from methyl tert-butyl ether (MtBE) stem extract of Vitis vinifera (Chardonnay cv). Their purification on a preparative scale was obtained by centrifugal partition chromatography

Direct identification and characterization of phenolic compounds from crude extracts of buds and internodes of grapevine (Vitis vinifera cv Merlot).

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The crude methanol extracts of latent buds and internodes Vitis vinifera L. cv. Merlot were used for the determination of phenolic compounds by a combination of reverse phase HPLC with diode array detection (HPLC-DAD) and mass spectrometry (LC-MS). This method allowed the identification of 9

Enhanced Stilbene Production and Excretion in Vitis vinifera cv Pinot Noir Hairy Root Cultures.

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Prijava / prijava

Stilbenes are defense molecules produced by grapevine in response to stresses including various elicitors and signal molecules. Together with their prominent role in planta, stilbenes have been the center of much attention in recent decades due to their pharmaceutical properties. With the aim of

Bioactive stilbenes from Vitis vinifera grapevine shoots extracts.

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BACKGROUND Viticultural residues from commercial viticultural activities represent a potentially important source of bioactive stilbenes such as resveratrol. The main aim of the present study was therefore to isolate, identify and perform biological assays against amyloid-β peptide aggregation of

Bioassay-guided isolation of antiproliferative compounds from grape (Vitis vinifera) stems.

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The fractionation, guided by cell-growth inhibition assay, of the EtOAc crude extract from grape stems of the Sicilian Vitis vinifera variety 'Nerello Mascalese' allowed identification often constituents, isolated either as pure compounds (1, 3-5, 7-10) or inseparable mixtures (2a-d and 6a-e). The

Comparative analyses of stilbenoids in canes of major Vitis vinifera L. cultivars.

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Prijava / prijava

Grapevine canes are rich in resveratrol and its complex derivatives. These compounds have many biological activities and are needed mainly for health purposes. Canes, which are often wasted, can be used to produce these high-value compounds at low cost. We studied sixteen Vitis vinifera L. cultivars

A Huge PVDF Adsorption Difference Between Resveratrol and ε-Viniferin Allows to Quantitatively Purify Them and to Assess Their Anti-Tyrosinase Property.

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Prijava / prijava

Repeated chromatographic analyses of polyphenolic vine stalks extracts allowed us to note a huge adsorption difference on polyvinylidene fluoride (PVDF), between trans-resveratrol 1 and (+)-trans-ε-viniferin 2. We could optimize the conditions (solvent, saturation of the process), for this polymer

Stilbene content of mature Vitis vinifera berries in response to UV-C elicitation.

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A method using HPLC analysis has been used to compare the level of resveratrol and its derivatives, piceid, pterostilbene and epsilon-viniferin, in grapevine berries of three Vitis vinifera varieties. The concentration of these compounds has been evaluated in healthy and Botrytis cinerea infected

Antioxidant properties of trans-epsilon-viniferin as compared to stilbene derivatives in aqueous and nonaqueous media.

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Prijava / prijava

trans-Epsilon-viniferin, the dimer of resveratrol, extracted from Vitis vinifera, has been evaluated for its antioxidant capacity. Its properties have been compared to those of resveratrol and synthetic stilbenic derivatives (4-hydroxystilbene, 4,4'-dihydroxystilbene, 3,5-dihydroxystilbene, and

Isolation and purification of two antioxidant isomers of resveratrol dimer from the wine grape by counter-current chromatography.

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Prijava / prijava

Resveratrol dimers belong to a group of compounds called stilbenes, which along with proanthocyanidins, anthocyanins, catechins, and flavonols are natural phenolic compounds found in grapes and red wine. Stilbenes have a variety of structural isomers, all of which exhibit various biological

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