Subramanian, P. and David, S.A. 2024. Antibacterial Activity of Piper betle Leaf Extract Mediated MnO2 Nanoparticles. UTTAR PRADESH JOURNAL OF ZOOLOGY. 45, 14 (Jun. 2024), 245–252. DOI:https://doi.org/10.56557/upjoz/2024/v45i144200.