1. Department of Chemistry
2. Sultan Qaboos University
3. Al Khoud 123
4. Sultanate of Oman
5. College of Science
6. University of Hail
7. Ha'il 81451
8. Kingdom of Saudi Arabia
9. Department of Basic Science
10. College of Applied and Health Sciences
11. A'Sharqiyah University
12. Ibra 400
13. University of Bath
14. Bath BA2 7AY
15. U.K.