Počet záznamů: 1

Phenolic acid content and radical scavenging activity of extracts from medlar (Mespilus germanica L.) fruit at different stages of ripening

  1. 1.
    0368589 - UEB-Q 2012 RIV NL eng J - Článek v odborném periodiku
    Grúz, Jiří - Ayaz, F. A. - Torun, H. - Strnad, Miroslav
    Phenolic acid content and radical scavenging activity of extracts from medlar (Mespilus germanica L.) fruit at different stages of ripening.
    Food Chemistry. Roč. 124, č. 1 (2011), s. 271-277 ISSN 0308-8146
    Grant CEP: GA AV ČR KAN200380801
    Výzkumný záměr: CEZ:AV0Z50380511
    Klíčová slova: Phenolic acids * HPLC * Mass spectrometry * Fruit * Ripening
    Kód oboru RIV: EF - Botanika
    Impakt faktor: 3.655, rok: 2011

    The medlar fruit (Mespilus germanica L) has been gaining commercial importance in recent years, attracting research on its chemical composition. In this study, we have investigated how the degree of ripeness affects the concentrations and proportions of phenolic acids. The DPPH scavenging activity and the total phenolic content (TPC) were determined. Five stages of fruit maturity were studied and eight phenolic acids (protocatechuic, 4-hydroxybenzoic, syringic, 3-hydroxybenzoic, caffeic, salicylic, 4-coumaric and sinapic) were determined by HPLC-MS. The concentrations of phenolic acids mostly decreased as the fruit ripening progressed, except for insoluble ester-bound phenolics, which increased at the early stages of maturity and decreased only during the ripe to over-ripe stage of maturity. The DPPH scavenging activity also decreased during fruit maturation, suggesting a decrease of natural antioxidants in fruit
    Trvalý link: http://hdl.handle.net/11104/0202888
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