International Union of Pure and Applied Chemistry. International Union of Pure & Applied Chemistry Internaional Union of Pure and Applied Chemistry. : International Union of Pure and Applied Physics. 27th International Congress of Pure and Applied Chemistry. The International Union of Pure and Applied Physics(IUPAP) Symposium series / International Union of Pure and Applied Chemistry. International School of Pure and Applied Biostructure. International Union of Theoretical and Applied Mechanics. International Union of Biochemistry.