1. Department of Chemistry, Faculty of Science
2. Alexandria University
3. 21321 Alexandria
4. Egypt
5. Department of Chemistry
6. Graz University of Technology
7. A-8010 Graz
8. Austria
9. Protein Research Department
10. Genetic Engineering & Biotechnology Institute
11. City for Scientific Research
12. Alexandria
13. Microbiology Section
14. Faculty of Science
15. University of Turin
16. 10125 Turin
17. Italy
18. Institute of Physical and Theoretical Chemistry
19. University of East Anglia
20. Norwich NR4 7TJ
21. UK