Prof. Dr. Abdullah Mohamed Asiri Chemistry Department Faculty of Science King Abdul-Aziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia Tel. +02-695 2293 Ext. 64274 Fax +02-695 2292 mobile: E-mail: aasiri2@kau.edu.sa www.kau.edu.sa/aasiri2 www.profasiri.net http://www.kau.edu.sa/Faculties/Science /scij/index.htm www.alkeemya.com