Dr. Yousra Mahmoud Al-Obaidi, a lecturer in the Department of Chemistry/College of Science/University of Anbar, participated with Dr. Hana Naji Abdullah from the College of Medical and Health Technologies/Central Technical University and a master’s student Amal Anwar Muhammad Abdul-Razzaq with the Electrochemical Study of Redox Stream Antioxidant Effect of Nanocellulose Membranes Prepared from Wheat Straw in Blood Medium) at the Fourth International Conference on Materials Engineering and Science , which was held on 6-7/October/2021 in the University of Duhok, Iraqi Kurdistan, where the organizing bodies of the conference: University of Duhok / Kurdistan of Iraq Al Nahrain University / Iraq University Perlis Malaysia / Malaysia University of Malaysian Sciences / Malaysia University of Birmingham / United Kingdom The conference was attended by a number of researchers, academics and graduate students from Iraq and other countries (Malaysia, India, Russia, Egypt, United Kingdom, Iran) and the publishers of the conference research AIP Conference Proceedings Materials Science Forum Key Engineering Materials Defect and Diffusion Forum Journal of renewable materials were keynote speakers Sein at the conference: Prof. Dr. Riyad Al-Mehidi from Australia - Dr. Zoradzman Muhammad Razlan from Malaysia Speakers in the sessions: Dr. Rozenza from Malaysia - Dr. Abdul Qadir Al-Akrish from Syria - Dr. Taghi Meri from the United Kingdom - Dr. Haider Butt from the United Arab Emirates The conference discussed all Subjects related to subjects in the field of engineering (material engineering, chemical engineering, mechanical engineering, civil engineering, environmental engineering, petroleum and petrochemical engineering, bioengineering, etc.) and sciences (chemistry, physics, geology, biology, nanotechnology, etc.(