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Facile synthesis of silver nanoparticles mediated by polyacrylamide-reduction approach to antibacterial application.

The current time increase in the prevalence of antibiotic resistant 'super-bugs' and the risks associated with food safety have become global issues. Therefore, further research is warranted to identify new and effective antimicrobial substances. Silver nanoparticles (Ag-NPs) were synthesized by autoclaving technique using, different concentrations of Ag salt (AgNO3) solution (1, 5, 10, and 25 mM). Their presence was confirmed by a surface plasmon resonance band at ∼435 nm using UV-Vis absorption spectra. The morphology of the synthesized Ag-NPs stabilized by polyacrylamide (PAM) was examined by TEM, SAED, and EDS. TEM images revealed that the synthesized Ag-NPs had an average diameter of 2.98±0.08 nm and SAED and EDS results confirmed the formation of Ag-NPs. In addition, FT-IR spectroscopy revealed that a PAM polymer matrix stabilized the Ag-NPs. The well diffusion method, was used to test, Gram positive and Gram negative bacteria were examined. Also the minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) were studied against Ag-NPs. The Ag-NPs exhibited strong inhibitory activity, MIC and MBC against the tested clinical bacterial isolates. These results suggest that Ag-NPs stabilized in PAM are highly effective against clinical bacterial isolates can be applied in medical fields.

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