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Phenolic acid content and radical scavenging activity of extracts from medlar (Mespilus germanica L.) fruit at different stages of ripening
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SYSNO ASEP 0368589 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Phenolic acid content and radical scavenging activity of extracts from medlar (Mespilus germanica L.) fruit at different stages of ripening Author(s) Grúz, Jiří (UEB-Q) RID, ORCID
Ayaz, F. A. (TR)
Torun, H. (TR)
Strnad, Miroslav (UEB-Q) RID, ORCIDNumber of authors 4 Source Title Food Chemistry. - : Elsevier - ISSN 0308-8146
Roč. 124, č. 1 (2011), s. 271-277Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords Phenolic acids ; HPLC ; Mass spectrometry ; Fruit ; Ripening Subject RIV EF - Botanics R&D Projects KAN200380801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000282500000038 DOI 10.1016/j.foodchem.2010.06.030 Annotation 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 Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2012
Number of the records: 1