PREPARATION, IDENTIFICATION AND BIOLOGICAL PROPERTIES OF NEW FLUORIDE NANOCOMPOUNDS

Indexación: Web of Science; Scopus.Nanoparticles (NPs) of new fluoride (SrF2 and MgF2) nanocompounds were synthesized by the simple chemical method of precipitation in ethanol. Synthesis of the strontium fluoride (SrF2)-magnesium oxide (MgO) nanocomposite was achieved through the ultrasonic method. These prepared nanopowders were characterized through Fourier transform infrared (FT-IR) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, Powder X-ray Diffraction (PXRD) and Scanning Electron Microscopy (SEM). FT-IR confirmed the purity of the synthesized fluoride NPs by evaluation of the vibrations, and UV-Visible showed the intense absorption peaks of NPs. PXRD analysis indicated the average of particle size, and SEM demonstrated a nearly spherical morphology of the NPs. The antibacterical properties of the nanopowders on Staphylococcus Aureus, Bacillus Subtilis and E. Aklay bacteria were studied, with the strongest effect by the magnesium fluoride (MgF2) NPs and the SrF2-MgO nanocomposite.http://ref.scielo.org/yfr3f

Biocidal activity of CuO nanoleaves against AGS cells, S. Aureus, E. Coli, and Micrococcus

In the present work, we carried out the synthesis of copper oxide nanoleaves and evaluate their biocidal activity. The resulting nanoparticles were characterized by X-ray Diffraction, Scanning Electron Microscopy, and Fourier Transform Infrared Spectroscopy. The antibacterial activity of the CuO nanoleaves particles was studied through the minimum inhibitory concentration method employing Staphylococcusaureus, Escherichia coli, and Micrococcus as modelorganisms. The results indicate that a concentration of 0.05 g mL-1 generate an inhibition zone of 20, 17and 12 mm for S. aureus, E. Coli and Micrococcus, respectively. Also, the copper oxide nanoleaves exhibited antitumor activity against human adenocarcinoma cells