1. Department of Chemical Engineering, 11 Arany Janos; “Babes Bolyai” University, Faculty of Chemistry and Chemical Engineering; Cluj-Napoca 400028 Romania
2. Department of Chemical Engineering, Bd. Prof. Dr. Doc. Dimitrie Mangeron 73; “Gheorghe Asachi” Technical University of Iaşi, Faculty of Chemical Engineering and Environmental Protection; Iaşi 700050 Romania
3. Department of Chemistry; University of Craiova, Faculty of Mathematics and Natural Sciences, 107 I Calea Bucureşti; Craiova 200478 Romania