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E. coli bacteria stained with SYTO 9 (considered alive, green) and propidium iodide (considered dead, red) incubated in presence of TPyCP-loaded polymersomes after 0 min (a) 30 min, (b) 120 min, (c) 240 min, (d) and 360 min (e) of illumination under red LED light (λ max = 660 nm)
