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- Title
Effect of Pulsed Electric Field Pretreatment on the Concentration of Lipophilic and Hydrophilic Compounds in Cold-Pressed Grape Seed Oil Produced from Wine Waste.
- Authors
Ćurko, Natka; Perić, Katarina; Vukušić Pavičić, Tomislava; Balbino, Sandra; Tomašević, Marina; Iveković, Damir; Radojčić Redovniković, Ivana; Kovačević Ganić, Karin
- Abstract
Pretreatment of grape pomace seeds with a pulsed electric field (PEF) was applied to improve the extraction yield of cold-pressed grape seed oil. The effects of different PEF conditions, electric field intensities (12.5, 14.0 and 15.6 kV/cm), and durations (15 and 30 min) on the oil chemical composition were also studied. All PEF pretreatments significantly increased the oil yield, flow rate and concentration of total sterols (p < 0.05). In addition, similar trends were observed for total tocochromanols and phenolic compounds, except for PEF pretreatment under the mildest conditions (12.5 kV/cm, 15 min) (p < 0.05). Notably, the application of 15.6 kV/cm for 30 min resulted in the highest relative increase in oil yield and flow rate (29.6% and 56.5%, respectively) and in the concentrations of total tocochromanols, nonflavonoids, and flavonoids (22.1%, 60.2% and 81.5%, respectively). In addition, the highest relative increase in the concentration of total sterols (25.4%) was achieved by applying 12.5 kV/cm for 30 min. The fatty acid composition of the grape seed oil remained largely unaffected by the PEF pretreatments. These results show that PEF pretreatment effectively improves both the yield and the bioactive properties of cold-pressed grape seed oil.
- Subjects
GRAPE seed oil; HYDROPHILIC compounds; ELECTRIC field effects; COMPOSITION of seeds; GRAPE seeds
- Publication
Foods, 2024, Vol 13, Issue 14, p2299
- ISSN
2304-8158
- Publication type
Article
- DOI
10.3390/foods13142299