Acorus calamus rhizome extract mediated biosynthesis of silver nanoparticles and their bactericidal activity against human pathogens oleh Chinnappan Sudhakar, Kandasamy Selvam, Muthusamy Govarthanan, Balakrishnan Senthilkumar, Arumugam Sengottaiyan, Murugesan Stalin, Thangasamy Selvankumar