1. Department of Mathematics and Natural Sciences School of Arts and Sciences American University of Ras Al Khaimah Ras Al Khaimah Road, P. O. Box 10021 Ras Al Khaimah UAE
2. Department of Chemical and Petroleum Engineering School of Engineering American University of Ras Al Khaimah Ras Al Khaimah Road, P. O. Box 10021 Ras Al Khaimah UAE
3. Department of Chemistry College of Sciences United Arab Emirates University P. O. Box 15551 Al Ain UAE
4. Department of Chemistry College of Sciences Research Institute of Science and Engineering University of Sharjah P.O. Box 27272 Sharjah UAE