1. Istituto per i Sistemi Biologici (ISB), CNR – Consiglio Nazionale delle Ricerche, Monterotondo , 00015 Rome , Italy
2. Faculty of Science, University Campus Bio-Medico of Rome , Via Alvaro del Portillo 21 , 00128 Rome , Italy
3. Department of Chemistry, University of Rome “La Sapienza“ , Piazzale Aldo Moro 5, P. O. Box 34, Posta 62 , 0018 Roma , Italy
4. Teaching Committee of Ph.D. School in Natural Science and Engineering, University of Verona , Verona , Italy