Text this: Characterization of Cu-mordenites with varying SiO2/Al2O3 ratios by 29Si-, 27Al-, 63Cu- and 1H-MAS NMR, optical absorption and catalytic activity for nitrogen oxide reduction; Biannual Conference on Chemistry, Chem 02, Faculty of Science, Department of Chemistry, Cairo University, Cairo, Egypt, March 4-7, 2002