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Sol–gel derived 50SiO₂•30CaO•10Fe₂O3•10Dy₂O₃ and 50SiO₂•28CaO• 10Fe₂O₃•10Dy₂O₃•2ZnO (mol %) glass-ceramic samples were investigated with respect to bovine serum albumin (BSA) attachment for possible applications in internal radiotherapy and hyperthermia. The protein adsorption was evaluated on vitro-ceramic samples obtained by heat treatment at 800 ºC and 1200 ºC of sol-gel derived glass samples. After immersion in spin labeled BSA solutions, the Electron Paramagnetic Resonance (EPR) analysis shows a decrease in the amount of attached protein with the addition of ZnO and following the heat treatment at high temperature.

Keywords: biomaterials; protein attachment; EPR.