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Dr. Alaa Osman is assistant professor at Zoology Department, Faculty of Science, Al-Azhar University (Assiut Branch), Egypt having excellent publication record and expertise in Aquatic Toxicology. His principal research interests lie in the field of Ecotoxicology, Environmental Toxicology, and Environmental Biology which is done to assess the effects of pollution on the aquatic environment using biomarker responses in fishes. Internationally it is not a large field with even less research focusing on biomarker responses in fishes. Currently, he is doing a postdoctoral stint (2010 – 2012) continuing with work on aquatic toxicology. His postdoctoral researches focused on the occurrence, distribution, and biological responses of pollutants in the river Nile.