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Research Article

Biosynthesis, characterization and antibacterial activity of silver nanoparticles by the Arctic anti-oxidative bacterium Paracoccus sp. Arc7-R13

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Pages 1488-1495 | Received 27 Feb 2019, Accepted 25 Mar 2019, Published online: 16 Apr 2019

Figures & data

Figure 1. Phylogenetic tree based on 16S rRNA gene sequences showing the relationships of the isolates with related species.

Figure 1. Phylogenetic tree based on 16S rRNA gene sequences showing the relationships of the isolates with related species.

Figure 2. Formation of SNPs (a) supernatant + AgNO3, (b) nanoparticles.

Figure 2. Formation of SNPs (a) supernatant + AgNO3, (b) nanoparticles.

Figure 3. (A) UV/vis spectral analysis of culture supernatant containing the AgNPs over a wavelength range of 300–700 nm after 48 h of reaction. Optimization of physicochemical parameters for silver nanoparticle synthesis: (B) concentration of silver (C) temperature and (D) incubation time.

Figure 3. (A) UV/vis spectral analysis of culture supernatant containing the AgNPs over a wavelength range of 300–700 nm after 48 h of reaction. Optimization of physicochemical parameters for silver nanoparticle synthesis: (B) concentration of silver (C) temperature and (D) incubation time.

Figure 4. (A) TEM image of AgNPs, (B) The size distribution of particles in TEM images.

Figure 4. (A) TEM image of AgNPs, (B) The size distribution of particles in TEM images.

Figure 5. EDX observation of biosynthesized AgNPs.

Figure 5. EDX observation of biosynthesized AgNPs.

Figure 6. FTIR spectrum recorded from microbially synthesized silver nanoparticle. (a) biosynthesis solution, and (b) supernatant.

Figure 6. FTIR spectrum recorded from microbially synthesized silver nanoparticle. (a) biosynthesis solution, and (b) supernatant.

Figure 7. Antimicrobial activities of synthesized AgNPs against S. aureus, P. aeruginosa, E. coli, and B. subtilis.

Figure 7. Antimicrobial activities of synthesized AgNPs against S. aureus, P. aeruginosa, E. coli, and B. subtilis.