Determination of acidity constants of curcumin in aqueous solution and apparent rate constant of its decomposition - Bernabé-Pineda, Margarita; Ramírez-Silva, María Teresa; Romero-Romo, Mario; González-Vergara, Enrique; Rojas-Hernández, Alberto (Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy, 2004)