Determination of conjugated diene in linoleic acid and α-linolenic acid, and TBARS in phosphatidylcholine (PC) and liposome of Vitamin E-stripped corn oil. (A) The formation of conjugated dienes in linoleic acid was significantly elevated after NEAPP irradiation for 5 min. (B) The formation of conjugated diene in α-linolenic acid was significantly elevated after NEAPP irradiation for 2 and 5 min. (C) TBARS in PC were significantly elevated after NEAPP irradiation for 30 s, 1, 2 and 5 min. (D) TBARS in liposomes of Vitamin E-stripped corn oil were also significantly elevated after NEAPP irradiation for 1, 2 and 5 min. Data are expressed as means ± SEM (n = 6 for conjugated diene assay; n = 5 for TBARS assay; ANOVA, p<0.0001, for A, B, p<0.001 for C, D; **p<0.01 and ***p<0.001 vs argon gas for 5 min).