1. Chemical Engineering Department; Faculty of Engineering, Ege University; Izmir 35100 Turkey
2. Polymer Department; Faculty of Chemistry, University of Concepcion, Casilla 160-C; Concepción Chile
3. Wroclaw University of Technology; Wroclaw Poland
4. Facultad de Farmacia, Universidad de Concepción Casilla 160-C; Concepción Chile