POTENSI ANTIBAKTERI NANOPARTIKEL ZINK SULFIDA HASIL REDUKSI Escherichia coli PADA SEL PLANKTONIK DAN BIOFILM BAKTERI = ANTIBACTERIAL POTENTION OF ZINC SULPHIDE NANOPARTICLE REDUCED BY Escherichia coli ON PLANKTONIC CELL AND BACTERIAL BIOFILM - MUTHMAINNAH, ANDI (2019)