Figure A1.

(A) Filamentary structures of non-uniform plasma can be observed as bright pixels in the presented photographs of plasma discharges (taken from our previous publication; methods and photograph parameters are detailed there [42]); (B) Non-uniform plasma treatment was performed in air (labeled “Non-Uniform Plasma”) and nitrogen (labeled “Filamentary Structures”) and compared to the uniform treatment to compare the two regimes (One Way ANOVA, Tukey’s multiple comparison test). Data are shown as mean ± SEM. *** p < 0.001.