Browsing by Author "Pérez Jiménez, Jara"

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    Differential Extraction and Preliminary Identification of Polyphenols from Ugni candollei (White Murta) Berries
    (2024) Fuentes Jorquera, Natalia Andrea; Canales Muñoz, Roberto Iván; Perez Correa, José Ricardo; Pérez Jiménez, Jara; Mariotti Celis, María Salomé
    Ugni candollei, commonly known as white murta, is a native Chilean berry with a polyphenol composition that has been underexplored. This study aimed to establish a comprehensive profileof white murta polyphenols using ultra-performance liquid chromatography electrospray ionizationOrbitrap mass spectrometry (UPLC-ESI-ORBITRAP MS). Additionally, it compared the efficacy ofconventional extraction methods with emerging techniques such as deep eutectic solvent (DES)extraction and hot pressurized water extraction (HPWE). The analysis tentatively identified 107 phenolic compounds (84 of them reported for the first time for this cultivar), including 25 phenolic acids,37 anthocyanins, and 45 flavonoids. Among the prominent and previously unreported polyphenolsare ellagic acid acetyl-xyloside, 3-p-coumaroylquinic acid, cyanidin 3-O-(6′-caffeoyl-glucoside, andphloretin 2′-O-xylosyl-glucoside. The study found HPWE to be a promising alternative to traditionalextraction of hydroxybenzoic acids, while DES extraction was less effective across all categories. Thefindings reveal that white murta possesses diverse phenolic compounds, potentially linked to variousbiological activities.
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    Effect of Pressurized Hot Water Extraction on Antioxidants from Grape Pomace before and after Enological Fermentation
    (2013) Vergara Salinas, José R.; Bulnes, Pedro; Zúñiga López, María Carolina; Pérez Jiménez, Jara; Torres, Josep Lluís; Mateos Martin, María Luisa; Agosin T., Eduardo; Pérez C., José Ricardo