GC-FID and NMR Spectroscopic Studies on Gamma Irradiated Walnut Lipids

Figure 1

(a) PCA model of GC-FID data scaled to Unit Variance (UV scaling); , : 71.5%, and : 37.1%. Samples of MAP, air, and vacuum packages are denoted by a star, triangle, and box, respectively. Yellow, red, blue, and green colors correspond to 0, 5, 10, and 13 kGy, respectively, as also denoted by the labels. Only the mean values of six different measurements per irradiation dose and packaging are presented. (b) Loading plot. (c) Contribution plot indicating fatty acids responsible for the discrimination of nonirradiated control samples (positive values) with the irradiated ones (negative values).

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