title: Mechanism of photoreduction of thiazine dyes by EDTA studied by flash photolysis III.  Consequences of a newly found pKT of thionine on the mechanism in basic solutions.
mesh_terms: D004396:Coloring Agents; D004492:Edetic Acid; D007097:Imines; D008027:Light; D010084:Oxidation-Reduction; D010640:Phenothiazines; D010782:Photolysis; D013843:Thiazines / Q000378:metabolism*
chemical_list: D004396:Coloring Agents; D007097:Imines; D010640:Phenothiazines; D013843:Thiazines; D004492:Edetic Acid; C009469:thionine