Materials
Virgin (VSO) and refined (RSO) sesame oils from unroasted sesame seeds with no added antioxidants were supplied by Datis (Yazd, Iran) and were kept at –18 °C until analysis. Refined olive oil (ROO) was purchased from a local shop. The standards of fatty acid methyl esters (FAME) and all chemicals and solvents used in experiments were of analytical reagent grade and purchased from Merck (Darmstadt, Germany) and Sigma-Aldrich (St. Louis, MO).