Fig. 1From: Accelerating skin regeneration and wound healing by controlled ROS from photodynamic treatmentSimplified Jablonski diagram illustrating the formation of singlet oxygen and other reactive species by transferring energy between states and from PS in excited states to molecular oxygen. Type I reaction defines by transferring an electron to biomolecules or directly to oxygen to produce ROS. A type II reaction involves energy transfer from the excited PS to molecular oxygen and producing singlet oxygenBack to article page