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In this research work, the nanoparticles of aluminum oxide were synthesized by two ways. The first way is the biological by using  (Pseudomonas aeruginosa) bacteria with a rate diameter (102.35) nm. The second way is the electrochemical  with a rate diameter (62) nm. These nanoparticles were characterized by Atomic Force Microscopy (AFM),  X-Ray diffraction technique (XRD), Transmission Electron Microscopy (TEM) and Scanninig Electron Microscopy (SEM).  Alumina nanoparticles are thermodynamically stable particles over a wide temperature range . The biological activity of these  nanoparticles toward different species of pathogenic bacteria (Staphylococcus aureus ) and (Pseudo monas) has been investigated. The results stated that the nanoparticles prepared by chemical way  was more effective on the inhibition of bacteria than the  nanoparticles prepared by biological way

SYNTHESIS OF NANO-ALUMINUM OXIDE VIA BIOLOGICAL AND ELECTROCHEMICAL METHODS