Figure 6
Radical formation of RHEs (a) and excised human skin (b) after UV irradiation. The data show the spin concentration (spins/mm3 × 1014) representative for radical formation in RHEs (a) and excised human skin (b) after irradiation with different wavelengths and irradiation doses. The corresponding p-values were obtained by comparing the different UVC wavelengths against VIS–NIR by one-way ANOVA with Dunnett post hoc tests for RHEs (a). All groups showed significantly lower radical formation in comparison to VIS–NIR. In excised human skin (b), the radical formation after irradiation with 233 nm (40 mJ/cm2) was twofold higher compared to irradiation with 222 nm (40 mJ/cm2). Radical formation was compared with the Student’s t-test for paired samples and showed no significant differences. Data were collected with n = 3 to n = 9 RHE models and n = 4 donors of excised human skin with 2 to 3 technical replicates, each. The data show mean ± SEM.
