Fig. 4.

Calculated root-mean-square (R.M.S.) distance of random movement for H₂O₂ using Eq. (2) and considering D* values calculated in present study. For comparative purposes we have also plotted data for ^•NO (grey), dopamine (DA, blue), NO₂⁻ (orange) and glutamate (purple). Red circles represent distance travelled by each analyte for their respective extracellular half-life time (t_1/2). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)