Evaluation of antibacterial activity of nano-hydroxyapatite (HAp) from freshwater mussel (Pilsbryoconcha sp.) shell against Escherichia coliSanthy Wisuda Sidauruk, Dian Iriani, N. Ira Sari, Rizky Ramadhan Rusdi and Muhammad Irfan RusadiBIO Web Conf., 74 (2023) 02002DOI: https://doi.org/10.1051/bioconf/20237402002