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Phenols and the antioxidant capacity of Mediterranean vegetables prepared with extra virgin olive oil using different domestic cooking techniques

Published on Dec 1, 2015in Food Chemistry5.399
· DOI :10.1016/j.foodchem.2015.04.124
Jessica del Pilar Ramírez-Anaya2
Estimated H-index: 2
(University of Guadalajara),
C. Samaniego-Sánchez4
Estimated H-index: 4
+ 2 AuthorsHerminia López García de la Serrana8
Estimated H-index: 8
Sources
Abstract
Abstract Potato, tomato, eggplant and pumpkin were deep fried, sauteed and boiled in Mediterranean extra virgin olive oil (EVOO), water, and a water/oil mixture (W/O). We determined the contents of fat, moisture, total phenols (TPC) and eighteen phenolic compounds, as well as antioxidant capacity in the raw vegetables and compared these with contents measured after cooking. Deep frying and sauteing led to increased fat contents and TPC, whereas both types of boiling (in water and W/O) reduced the same. The presence of EVOO in cooking increased the phenolics identified in the raw foods as oleuropein, pinoresinol, hydroxytyrosol and tyrosol, and the contents of vegetable phenolics such as chlorogenic acid and rutin. All the cooking methods conserved or increased the antioxidant capacity measured by DPPH, FRAP and ABTS. Multivariate analyses showed that each cooked vegetable developed specific phenolic and antioxidant activity profiles resulting from the characteristics of the raw vegetables and the cooking techniques.
  • References (40)
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