248CHARACTERIZATION OF NEWLY SYNTHESIZED ZINC SULPHIDE NANOPARTICLES BY A SIMPLE AQUEOUS CHEMICAL METHOD AND DETERMINATION OF ITS ANTIMICROBIAL ACTIVITY AGAINST VARIOUS PATHOGENIC BACTERIAL STRAINSjumicrobiol@yahoo.co.injumicrobiol@yahoo.co.inResearch452013 Zinc Sulfide,Nanoparticles,Aqueous Chemical Synthesis,AntimicrobialSutapa Ganguly, Parveen Sultana, Sukhen Das,Sujata G DastidarDepartment of Physics, Jadavpur University, Kolkata- 700 032, India.,Department of Physics, Jadavpur University, Kolkata- 700 032, India.,Department of Physics, Jadavpur University, Kolkata- 700 032, India., Department of Microbiology, Herbicure Healthcare Bio-Herbal Research Foundation, Metro Garden City, Pailan, Kolkata-700 104, India