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Photoactivation of TAPP-adsorbed bone allograft. Bone chips are incubated with 5,10,15,20-tetrakis-(4-aminophenyl)-porphyrin (TAPP), structure shown above the arrow to produce TAPP adsorbed to mineralized bone allograft. When illuminated (hν), excitation of the TAPP-adsorbed to allograft can produce ROS (O12) in the immediate vicinity of the surface (green haze); these ROS are known to be antimicrobial.
