Table 6.

The effect of quercetin and naringenin on the amount of protein carbonyls (nmol/mg protein) in extended boar spermatozoa (n = 28).

	0 h	24 h	48 h	72 h
Ctrl	0.75 ± 0.15	1.65 ± 0.42	2.68 ± 0.59	5.09 ± 0.56
5 µM/L QUE	0.79 ± 0.19	1.45 ± 0.36	1.98 ± 0.15	3.67 ± 0.67 *
10 µM/L QUE	0.77 ± 0.13	1.27 ± 0.36	1.89 ± 0.21	2.92 ± 0.56 ***
25 µM/L QUE	0.73 ± 0.16	1.19 ± 0.35	2.63 ± 0.36	4.92 ± 0.45
50 µM/L QUE	0.72 ± 0.29	2.14 ± 0.25	2.75 ± 0.70	6.08 ± 0.43
5 µM/L NAR	0.82 ± 0.07	1.52 ± 0.28	2.45 ± 0.29	4.51 ± 0.45
10 µM/L NAR	0.76 ± 0.14	1.45 ± 0.38	2.32 ± 0.41	3.92 ± 0.55
25 µM/L NAR	0.78 ± 0.17	1.35 ± 0.23	2.15 ± 0.34	3.47 ± 0.49 *
50 µM/L NAR	0.83 ± 0.17	1.80 ± 0.49	2.66 ± 0.31	5.36 ± 0.52

Mean ± S.D. * p < 0.05; *** p < 0.001 in comparison with the control. QUE—quercetin; NAR—naringenin.