title: A comparison of type I and type II photosensitization and protection and the various roles of hydrogen bonding to substrates, photosensitizers, and intermediates.
mesh_terms: D002384:Catalysis; D006371:Helium; D006860:Hydrogen Bonding; D008027:Light; D008967:Molecular Biology; D010777:Photochemistry; D010782:Photolysis
chemical_list: D006371:Helium