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Green synthesis, characterisation and antibacterial activities of mediated silver nanoparticles (SC-AGNPS) against selected bacteria. | LitMetric
This study aims to characterize and determine the antibacterial activities of synthesized -mediated AgNPs (SC-AgNPs) against , and water extract acts as a reducing and capping agent in the synthesis of AgNPs. The synthesized AgNPs were characterized by using UV-Vis spectrophotometer, dynamic light scattering (DLS), field emission scanning electron microscope (FESEM), X-ray diffractometer (XRD) and Fourier transform infra-red (FTIR). FESEM images showed a rough surface with a spherical shape. The average size distribution of 75.25 nm with a polydispersity index (PDI) of 0.373. XRD analysis matched the face-centred cubic structure of silver. FTIR analysis revealed a shifted peak from 1404.99 to 1345.00 cm. MIC and MBC values of SC-AgNPs were 1.25 mg/mL and 2.5 mg/mL against , , respectively. Time-kill assay showed that SC-AgNPs significantly reduced bacterial growth as compared to non-treated bacteria. Morphologies of bacteria treated with SC-AgNPs were shrunk, lysed, irregular and smaller as compared to control. SC-AgNPs significantly disrupted the gene expression of A, B and A ( < 0.05). This study indicated that the synthesized SC-AgNPs were stable with enhanced antibacterial activities.
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