Mohammed Hamed A, A. Mohammed A. Uptake of Copper Oxide Nanoparticles by Hypocotyl Callus Tissues of Helianthus annuus L. Seedlings. RSCI [Internet]. 2022 Dec. 1 [cited 2025 Sep. 10];31(4):32-4. Available from: https://edusj.uomosul.edu.iq/index.php/rsci/article/view/47463