Articles producció científica> Medicina i Cirurgia

Pine bark and green tea concentrated extracts: Antioxidant activity and comprehensive characterization of bioactive compounds by HPLC-ESI-QTOF-MS

  • Dades identificatives

    Identificador: PC:1102
    Handle: https://hdl.handle.net/20.500.11797/PC1102
    Autors:
    Cádiz-Gurrea, M.L.Fernández-Arroyo, S.Segura-Carretero, A.
    Resum:
    10.3390/ijms151120382

  • Altres:

    Autor segons l'article: Cádiz-Gurrea, M.L. Fernández-Arroyo, S. Segura-Carretero, A.
    Departament: Medicina i Cirurgia
    Autor/s de la URV: María de la Luz Cádiz-Gurrea, Salvador Fernández-Arroyo, Antonio Segura-Carretero
    Resum: The consumption of polyphenols has frequently been associated with low incidence of degenerative diseases. Most of these natural antioxidants come from fruits, vegetables, spices, grains and herbs. For this reason, there has been increasing interest in identifying plant extract compounds. Polymeric tannins and monomeric flavonoids, such as catechin and epicatechin, in pine bark and green tea extracts could be responsible for the higher antioxidant activities of these extracts. The aim of the present study was to characterize the phenolic compounds in pine bark and green tea concentrated extracts using high-performance liquid chromatography coupled to electrospray ionization mass spectrometry (HPLC-ESI-QTOF-MS). A total of 37 and 35 compounds from pine bark and green tea extracts, respectively, were identified as belonging to various structural classes, mainly flavan-3-ol and its derivatives (including procyanidins). The antioxidant capacity of both extracts was evaluated by three complementary antioxidant activity methods: Trolox equivalent antioxidant capacity (TEAC), ferric reducing antioxidant power (FRAP) and oxygen radical absorbance capacity (ORAC). Higher antioxidant activity values by each method were obtained. In addition, total polyphenol and flavan-3-ol contents, which were determined by Folin-Ciocalteu and vanillin assays, respectively, exhibited higher amounts of gallic acid and (+)-catechin equivalents.
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 1422-0067
    Pàgina final: 20402
    Volum de revista: 15
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Entitat: Universitat Rovira i Virgili.
    Any de publicació de la revista: 2014
    Pàgina inicial: 20382