Figure 2. The percutaneous passage (unidirectional flux through the skin) of atrazine, antipyrine, mannitol, paraquat, and glyphosate in pig ear (dashed symbols, upper scale) and frog (open symbols, lower scale).

Data are shown as mean ± standard error values from 7, 12, 15, 10, 8 and 14, 9, 11, 10, 17 and experiments in pig and frog, respectively, following 24 h (pig) or 6 h (frog) incubation at room temperature (20–22°C).