Figure 3

Acidity of olive oil extracted from two sources and kept at different temperatures for 60 days; a,b,c means within a group which are not followed by a common superscript letters are significantly different (P < 0.05). Gorgan olive at 20 °C (G20); Gorgan olive at 5 °C (G5); Gorgan olive at -18 °C (G-18); Kordkuy olive at 20 °C (K20); Kordkuy olive at 5 °C (K5); Kordkuy olive at −18 °C (K-18).