Table 3.

Effect of PCP on free radical parameters in milk during storage period.

Item1	Storage time (d)	NC2	PC1	PC2	AC
DPPH scavenging activity (%)	0	82.57 ± 1.68a	84.62 ± 0.24a	84.70 ± 1.19a	84.22 ± 0.60
	1	55.36 ± 4.53bB	84.86 ± 0.95aA	84.78 ± 0.76aA	85.01 ± 0.60A
	3	52.52 ± 2.92bB	83.44 ± 0.47bA	82.80 ± 1.19abA	83.48 ± 2.87A
	7	50.15 ± 2.49bB	83.28 ± 0.60bA	82.65 ± 0.83bA	84.15 ± 0.24A
${\text{O}}_2^{-}$ (U/L)	0	88.74 ± 23.45b	85.14 ± 4.20b	85.52 ± 9.98b	84.65 ± 12.14ab
	1	124.19 ± 25.06aA	87.29 ± 10.86bB	83.73 ± 8.50bB	79.45 ± 11.35bB
	3	140.80 ± 18.14aA	92.59 ± 4.39bB	97.85 ± 9.62abB	89.01 ± 6.38abB
	7	127.26 ± 19.97a	110.73 ± 6.61a	101.14 ± 9.02a	95.67 ± 5.08a
H2O2 (mmol/L)	0	66.02 ± 23.56c	64.80 ± 6.51b	69.51 ± 7.99	68.01 ± 12.11
	1	192.55 ± 29.55bA	80.21 ± 9.55bB	63.55 ± 14.41B	81.66 ± 13.75B
	3	208.75 ± 31.05bA	135.28 ± 13.62aB	82.61 ± 18.11C	78.91 ± 11.29C
	7	335.53 ± 16.24aA	141.71 ± 23.19aB	79.44 ± 12.14C	75.46 ± 12.19C

¹NC, negative control of no addition anthocyanins + exposure to fluorescent light; PC1, positive control 1 of no addition anthocyanins + protected from fluorescent light; PC2, positive control 2 of the addition of 0.3% (w/v) anthocyanins + exposure to fluorescent light; AC = the addition of 0.3% (w/v) anthocyanins + protected from fluorescent light. DPPH scavenging activity, 2,2-diphenyl-1-picrylhydrazyl scavenging activity; ${\text{O}}_2^{-}$, superoxide anion; H₂O₂, hydrogen peroxide.

^{2a, b}Means with different letters within a column are significantly different between means for storage time (P < 0.05).

^A−DMeans with different letters within a row are significantly different between means for milk samples (P < 0.05).