Effect of UV Irradiation on Interactions of 𝜶-Lipoic Acid with Free Radicals

Table 2

The asymmetry parameters 𝐴₁/𝐴₂, 𝐴₃/𝐴₄, 𝐴₅/𝐴₆, 𝐵₁/𝐵₂, 𝐵₃/𝐵₄, and 𝐵₅/𝐵₆ of the analyzed EPR spectra of DPPH. The parameters are defined in Figure 1. The times of UV irradiation of the sample were written in minutes.

Sample	𝐴1/𝐴2; [±0.02]	𝐴1/𝐴2; [±0.02]	𝐴1/𝐴2; [±0.02]	𝐵1/𝐵2; [±0.02]	𝐵1/𝐵2; [±0.02]	𝐵1/𝐵2; [±0.02]
DPPH—reference	1.11	1.03	1.01	1.07	1.04	1.00
Nonirradiated lipoic acid	0.82	0.63	1.70	1.04	0.75	0.71
UV-irradiated lipoic acid; (10 minutes)	1.54	1.33	1.24	1.00	0.94	1.02
UV-irradiated lipoic acid; (20 minutes)	0.89	1.56	0.74	0.82	0.95	1.01
UV-irradiated lipoic acid; (30 minutes)	0.79	1.08	0.58	0.69	0.92	0.94
UV-irradiated lipoic acid; (40 minutes)	1.29	2.18	1.40	1.07	1.11	1.07
UV-irradiated lipoic acid; (50 minutes)	0.90	0.80	0.91	0.63	0.95	0.91
UV-irradiated lipoic acid; (60 minutes)	1.34	1.03	1.02	1.42	1.09	1.02
UV-irradiated lipoic acid; (70 minutes)	0.96	1.30	0.94	1.04	1.00	0.94
UV-irradiated lipoic acid; (80 minutes)	0.88	1.07	0.97	1.14	0.98	1.01
UV-irradiated lipoic acid; (90 minutes)	0.90	0.96	0.78	0.88	1.01	1.01
UV-irradiated lipoic acid; (100 minutes)	1.00	0.84	1.50	0.78	0.93	0.96
UV-irradiated lipoic acid; (110 minutes)	0.69	1.25	0.68	0.92	1.22	1.01