Assistant Professor Dr. (Alaa Hussein Mahdi), teaching assistant in the Department of Biology, participated as a member of the doctoral thesis committee for the student (Safa Misir Kamoush) from the Department of Biology at the College of Education / University of Al-Qadisiyah for her tagged thesis titled (The role of different concentrations of cholesterol and vitamin D3 on some parameters physiological and immunological in males of immunosuppressed rats). The discussion committee consisted of: Dr. Adnan Hamid Hamad. President Dr. Haider Saleh Jafat as a member Dr. Ask success patience. member Dr. Alaa Hussein Mahdi. member Dr. Enas Muhammad is an unknown. member Dr. Ahmed Jassim Hassan. member and supervisor After extensive scientific discussion and listening to the student’s defense of her thesis, her research method, and her use of sources and references, the thesis was approved with honors. Congratulations to the student, her supervisor, and the College of Education at the University of Al-Qadisiyah for this achievement, and God Almighty grants success and payment.