PEF-dependency on polyphenol extraction during maceration/fermentation of Grenache grapes
| Autor: | Javier Raso, Carlota Delso, Juan Manuel Martínez, Alejandra Beatriz Camargo, Ignacio Álvarez, Marcos Andrés Maza |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
EXTRACTION
Chemistry High intensity Color intensity 04 agricultural and veterinary sciences General Chemistry 040401 food science Industrial and Manufacturing Engineering 0404 agricultural biotechnology POLYPHENOLS Polyphenol CIENCIAS AGRÍCOLAS Maceration (wine) Fermentation Food science MACERATION Otras Ciencias Agrícolas Quality characteristics OPTIMIZATION PULSED ELECTRIC FIELDS Food Science |
| Popis: | Application to different electric field strengths (E) and specific energies (W) with the pulsed electric fields (PEF) technology on the rate of extraction of phenolic compounds during maceration/fermentation of Grenache grapes was studied. A response surface model between the total polyphenol index extraction rate (TPI) and the E and W of the PEF treatments was established, which permitted the determination of PEF processing conditions to achieve a certain TPI. To achieve a TPI of 50, treatments ranged from high intensity and short time (8 kV·cm− 1 and 45 μs) to low intensity and long time (1 kV·cm− 1 and 2800 μs) applying an optimum W of 4 kJ·kg− 1 in all cases. The application of these PEF treatments reduced maceration time by a rate of 25 to 37% with respect to the untreated grape. Quality characteristics (color intensity, tannins, and total anthocyanins) were neither affected after fermentation nor after 12 months aging in bottles. Fil: Maza, Marcos Andres. Universidad de Zaragoza; España. Universidad Nacional de Cuyo; Argentina Fil: Martínez, Juan Manuel. Universidad de Zaragoza; España Fil: Delso, Carlota. Universidad de Zaragoza; España Fil: Camargo, Alejandra Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; Argentina. Universidad Nacional de Cuyo; Argentina Fil: Raso, Javier. Universidad de Zaragoza; España Fil: Álvarez, Ignacio. Universidad de Zaragoza; España |
| Databáze: | OpenAIRE |
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