Fig. 2

Overview of possible reactions in systems inspected in this work (PB and BSA) subjected to PEF, leading to the photon emission. Species shown as red denote ROS (radicals and \(^1\hbox {O}_2\)) and radical forms of BSA, blue denotes \(\hbox {H}_2\hbox {O}_2\) (originally introduced in selected experiments) and its deprotonated form \(\hbox {HO}_2^-\). Reactions are grouped to color fields based on their typology (anodic electrooxidation, bulk reactions among ROS, oxidation of BSA, enzymatic reactions, Fenton reaction, cathodic electroreduction).