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Absorption (A, shown in red), reflection (R, shown in green), and multiple reflections (MR, shown in blue) components of the overall shielding efficiency (shown in black), for biochar-epoxy layers of thickness 10 mm and 30 mm. was calculated from experimental data shown in Figure 1 (epoxy-25 wt.%-biochar composite, with biochar treated at 1500 °C).
