Fig. S1. a. Images showing changes in bead fluorescence after various extents of oxidation by P. chrysosporium on a wood section. From left to right, the RG ratios are 2.6, 1.5, and 1.0; and the corresponding concentrations of AAPH-derived radicals from the standard curve are 1, 10, and 25 mM. Each image frame is 5.8 μm wide.

b. Calibration curve relating RG ratios of BODIPY beads to concentrations of radicals generated by AAPH thermolysis. The points with error bars indicate experimental results with 95% confidence intervals, and the plotted curve is an empirical fit to the data using the equation shown.

Fig. S2. Relationship of predicted gradients in oxidant concentration to values of θ from the reaction–diffusion model.

Supplementary notes.

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