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Characterization and quantitation of antioxidant constituents of sweet pepper (Capsicum annuum L.).
Sweet peppers (Capsicum annuum L.) cv. Vergasa have been studied at four maturity stages (immature green, green, immature red, and red). The individual phenolics (hydroxycinnamic acids andExpand
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Characterisation of polyphenols and antioxidant properties of five lettuce varieties and escarole.
Salad vegetables could be relevant as dietary sources of natural antioxidants. A better knowledge of their composition can be useful for understanding their potential bioavailability and biologicalExpand
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Phenolic compounds from Brazilian propolis with pharmacological activities.
Four compounds were isolated from Brazilian propolis. They are identified as: (1) 3-prenyl-4-hydroxycinnamic acid (PHCA), (2) 2,2-dimethyl-6-carboxyethenyl-2H-1-benzopyrane (DCBEN), (3)Expand
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Characterization of C-glycosyl flavones O-glycosylated by liquid chromatography-tandem mass spectrometry.
Fifty three O-glycosyl-C-glycosyl flavones with O-glycosylation on phenolic hydroxyl or on the C-glycosyl residue or combination of both forms have been studied by liquid chromatography-UV diodeExpand
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Phenolic profiles of Portuguese olive fruits (Olea europaea L.): Influences of cultivar and geographical origin
Abstract The phenolic compounds present in 29 samples of olive fruits were analysed by reversed-phase HPLC/DAD and/or HPLC-DAD/ESI-MS/MS. All samples were collected during the normal picking periodExpand
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  • Open Access
Effect of processing and storage on the antioxidant ellagic acid derivatives and flavonoids of red raspberry (Rubus idaeus) jams.
From red raspberries, ellagic acid, its 4-arabinoside, its 4' (4' '-acetyl) arabinoside, and its 4' (4' '-acetyl)xyloside, as well as quercetin and kaempferol 3-glucosides, were identified. InExpand
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Phytochemical and antioxidant characterization of Hypericum perforatum alcoholic extracts
Abstract The antioxidant potentials of a total ethanolic extract of Hypericum perforatum (TE) and fractions were evaluated and correlated with their phenolic contents. The extracts were fullyExpand
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  • Open Access
Approach to the study of C-glycosyl flavones by ion trap HPLC-PAD-ESI/MS/MS: application to seeds of quince (Cydonia oblonga).
Ion trap HPLC-PAD-ESI/MS/MS has been used to study C-glycosyl flavones in quince seeds. Comparative analysis of the ions [(M-H)-60]-, [(M-H)-90]- and [(M-H)-120]- from 6-C- and 8-C-glycosyl flavoneExpand
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HPLC flavonoid profiles as markers for the botanical origin of European unifloral honeys
The HPLC phenolic profiles of 52 selected unifloral honey samples produced in Europe were analysed to detect possible markers for the floral origin of the different honeys. Lime-tree (five markers),Expand
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Artichoke (Cynara scolymus L.) byproducts as a potential source of health-promoting antioxidant phenolics.
The present study reports a fast, economical, and feasible way to extract antioxidant phenolics from artichoke byproducts: raw artichoke (RA), blanched (thermally treated) artichoke (BA), andExpand
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