Pavel Petrov, Saratov State University, Russia
Elena Tuchina, Saratov State University, Russia
The goal of this study was to evaluate the sensitivity of microorganisms to the action of LED blue (405 nm) light after treatment of their cells with TiO2 or Fe2O3 nanoparticles.
The bacterial strains used in this study were Staphylococcus aureus 209 P (standard strain), Staphylococcus simulans and Dermabacter hominis (isolated from the pus of patients with maxillary sinusitis).
As LED-light source with spectrum maxima at 405 nm providing corresponding power density of 31.5 mW/cm2 were taken. The light exposure was ranged from 5 to 30 min. Fe2O3 nanoparticles with average size about 8 nm in concentration 0.005% were used. The suspension of uncovered 100-nm titanium dioxide (TiO2; Sigma-Aldrich, USA) nanoparticles was used.
It was shown, irradiation with blue light caused a decrease in the number of microorganisms treated with nanoparticles of 20 - 90%.
Elena Svyatoslavna Tuchina
Saratov State University, Docent
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