1. “Petru Poni” Institute of Macromolecular Chemistry; Romanian Academy; Grigore Ghica Voda Alley 41A 700487 Iasi Romania
2. Romanian Academy-Timisoara Branch; Center for Fundamental and Advanced Technical Research; Laboratory of Magnetic Fluids; 24 Bd. Mihai Viteazul 300223 Timisoara Romania
3. Department of Natural and Synthetic Polymers; “Gh. Asachi” Technical University of Iasi; 73 Prof. Dimitrie Mangeron Street Iasi 700050 Romania