Title of article :
Polymethoxylated, C- and O-glycosyl flavonoids in tangelo (Citrus reticulata × Citrus paradisi) juice and their influence on antioxidant properties
Barreca، نويسنده , , Davide and Bisignano، نويسنده , , Carlo and Ginestra، نويسنده , , Giovanna and Bisignano، نويسنده , , Giuseppe and Bellocco، نويسنده , , Ersilia and Leuzzi، نويسنده , , Ugo and Gattuso، نويسنده , , Giuseppe، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
A separation/identification protocol based on RP-LC-DAD–ESI-MS–MS has been employed for the characterisation of the flavonoid fraction of the juice from tangelos (Citrus reticulata × Citrus paradisi) grown in Southern Italy. Eleven compounds were identified in a single chromatographic course. Of these, two C-glycosyl flavones (lucenin-2 and vicenin-2) and an O-triglycosyl flavanone (narirutin 4′-O-glucoside) were identified for the first time. Fruit juice antioxidant activity was evaluated on the basis of its ability to scavenge DPPH, O2−, OH and ABTS+ radicals, and to reduce iron (FRAP). Moreover, the influence of the identified polymethoxylated, C- and O-glycosyl flavonoids on the total antioxidant activity has been elucidated. We also checked the antimicrobial activity of a broad fraction, containing all the detected flavonoids obtained by preparative HPLC, in terms of MICs for Staphylococcus aureus.
HPLC-DAD–ESI-MS–MS , antioxidant activity , Flavonoids , C. reticulata , × , C. paradisi , Tangelo
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