Berry fruits as source of pectin: Conventional and non-conventional extraction techniques - Munoz-Almagro, Nerea; Ruiz-Torralba, Arancha; Mendez-Albinana, Pablo; Guerra-Hernandez, Eduardo; Garcia-Villanova, Belen; Moreno, Rodrigo; Villamiel, Mar; Montilla, Antonia (INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 2021)