Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar. E-mail: aelshafie@qu.edu.qa; Fax: +974 4403 4651
Dr. Ahmed El Shafie
Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar. E-mail: aelshafie@qu.edu.qa; Fax: +974 4403 4651
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