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

Table 1

Parameters 𝐴₁,𝐴₂, 𝐴₃, Δ𝐵₁, Δ𝐵₂, and Δ𝐵₃ 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; (a. u.); [±0.02]	𝐴2; (a. u.); [±0.02]	𝐴3; (a. u.); [±0.02]	Δ𝐵1; (mT); [±0.02]	Δ𝐵2; (mT); [±0.02]	Δ𝐵3; (mT); [±0.02]
DPPH—reference	2.99	4	2.92	0.55	1.64	2.97
Nonirradiated lipoic acid	0.03	0.03	0.03	0.41	1.23	2.17
UV-irradiated lipoic acid; (10 minutes)	0.58	0.64	0.51	0.40	1.74	3.21
UV-irradiated lipoic acid; (20 minutes)	1.06	2.44	1.56	0.43	1.68	3.13
UV-irradiated lipoic acid; (30 minutes)	1.05	2.45	1.65	0.39	1.71	3.21
UV-irradiated lipoic acid; (40 minutes)	1.11	2.50	1.60	0.47	1.67	3.31
UV-irradiated lipoic acid; (50 minutes)	1.11	2.31	1.55	0.43	1.73	2.97
UV-irradiated lipoic acid; (60 minutes)	1.09	2.43	1.56	0.40	1.77	3.14
UV-irradiated lipoic acid; (70 minutes)	1.07	2.39	1.65	0.45	1.71	3.19
UV-irradiated lipoic acid; (80 minutes)	1.04	2.44	1.56	0.41	1.71	3.13
UV-irradiated lipoic acid; (90 minutes)	1.11	2.50	1.61	0.43	1.75	3.24
UV-irradiated lipoic acid; (100 minutes)	1.02	2.29	1.50	0.42	1.63	2.94
UV-irradiated lipoic acid; (110 minutes)	1.05	2.09	1.42	0.44	1.49	2.84