Fig. 3
From: Adaption of a dermal in vitro method to investigate the uptake of chemicals across amphibian skin
Comparative overview of impedances of the skin of Xenopus laevis prior to dermal absorption experiments. Measured skin impedance data illustrated as boxplots separated into freshly excised and frozen stored skin with dorsal (=d) and ventral (=v) body sides; each boxplot is based on 9–12 skin samples (as specified in brackets behind indication of skin side beneath the boxplots), stemming from four (freshly excised skin) to six (frozen stored skin) animals each; asterisks indicate the level of significance and different letters indicate significant difference calculated as described in “Methods” section. An Additional file shows individual measured impedances in detail (see Additional file 3)