Phytofabrication of Chitosan–MgO nanocomposites: Evaluation of their antioxidant, antibacterial, anticancer, and zebrafish embryo biocompatibility properties - M. Yasmin Begum; Manickam Rajkumar; Prabha Govindaraj; Krishnan Meenambigai; Mona Alhamod; Hamoud Alotaibi (Journal of Photochemistry and Photobiology B: Biology, 2026)