1. Chemistry Department, Faculty of Science; Tanta University; Tanta 31527 Egypt
2. Egyptian Petroleum Research Institute; Nasr City 11727 Cairo, Egypt
3. LMPE Srl-Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali; Florence 50121 Italy
4. Department of Anatomy, Faculty of Veterinary Medicine; Kafrelsheikh University; Egypt