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. 2017 Nov 28;18(12):2548. doi: 10.3390/ijms18122548

Figure 4.

Figure 4

Colorimetric studies for pharmacological evaluation. (a) Statistical differences of positive control with respect to basal values (0 min); (b) relative erythema (%) of PGZ-limonene at different time intervals with respect to the basal stage (0 min); (c) relative erythema (%) of limonene at different time intervals with respect to the basal stage (0 min). Horizontal bars represent the average value. Significant statistical differences: * p < 0.05, ** p < 0.01, **** p < 0.0001, ns = non-significant.