extracts and control potatoes is shown in Fig. 6. The samples treated with bougainvillea, cinnamon and wild oregano extract showed peroxides value of 9.5, 8.5 and 6.7 meq/kg, respectively.
By the other hand, samples treated with green tea and thyme extract presented peroxides value (16.3 and 15.9 meq/kg) numerically greater than that obtained for the control potatoes (11.9 meq/kg).
However, no statistically significant differences (P < 0.05)were seen between the peroxide indices of the treated potatoes and the control potatoes, indicating the same protection against the oxidation of oil.