A master's thesis in the Department of Ecology at the College of Science at the University of Basra discussed the study of concentrations of polychlorinated biphenyls (PCBs) in the southern part of the Tigris River.

The dissertation of graduate student Al-Hasnain Mustafa Kazem included a study of the concentrations of chemical compounds affecting living organisms, the size of the concentrations, and the permissible range in Iraqi waters.

The thesis aims to study the environmental factors in the Tigris River and their relationships with the chemical compounds PCBs.