In fact, p-hydroxybenzoic acid, cinnamic acid and α-tocopherol, did not reveal significant differences for each of the applied doses. The tocopherol vitamers tended to be higher in irradiated samples ( Fig. 1I), with an obvious dose-dependent specificity (α-tocopherol in samples irradiated with 6 kGy, β-tocopherol in those irradiated with 2 kGy and γ-tocopherol in samples irradiated with 10 kGy); the higher levels detected in irradiated samples are in agreement with previous results