The use of microorganisms in the synthesis nanoparticles is known as an eco-friendly method. moreover, because of the ability of
microorganisms to synthesize nanoparticles of various sizes, shapes and morphologies, this
method has gained extreme attentions in recent years. the aim of this study was, therefore, to investigate the antimicrobial effects of nanoparticles synthesized by bacteria isolated from agricultural territorys of qazvin, iran.
This study was carried out in 2017. nanoparticles were
characterized by sem, eds and xrd analyzes. the antimicrobial effects of nanoparticles
were also assessed against some pathogenic bacteria.
Of the 40 nanoparticle producing bacteria, the strains that were able to
produce nanoparticles with high antimicrobial activity yielded under different
environmental conditions, were selected. the results of scanning electron microscopy (sem)
confirmed the presence of nanoparticles with a spherical shape. eds analysis showed that
silver content of the particles was about 60 wt %. sequence alignment and phylogenetic tree
results showed that m9 and b7 strains are closely related to bacillus cereus and pseudomonas
argentinensis, respectively, with 99% homology.
The results showed that the m9 and b7 strains can synthesize
nanoparticles with high antimicrobial effects under different environmental conditions.