Biosynthesis of silver nanoparticles and the comparison of their antibacterial activity against Bacillus cereus and Serratia marcescens

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HAJMOHAMMADI F.; HEMMAT J.

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Journal: Journal of Molecular and Cellular Researches Year:2019 | Volume:32 | Issue:1 Page(s): 16-32

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Title

Biosynthesis of silver nanoparticles and the comparison of their antibacterial activity against Bacillus cereus and Serratia marcescens

Author(s)

HAJMOHAMMADI F. | HEMMAT J. | Issue Writer Certificate

Keywords

Ag nanoparticleQ2

antibacterial activityQ1

Isoptericola variabilisQ1

Abstract

The extracellular biosynthesis of silver nanoparticles (AgNPs) using a bacterial system could be a probable approach, avoiding using destructive chemicals. The aim of this study was the biosynthesis of silver nanoparticles and comparison of their antibacterial activity against Bacillus cereus and Serratia marcescens. Biosynthesis of AgNPs was done using novel strains of alkalophile Isoptericola variabilis sp. IRSH1 and waste agriculture. AgNPs were characterized by dynamic light scattering (DLS) and scanning electron microscopy (SEM). Their synthesis were optimized by experimental design using response surface methodology (RSM). The antibacterial activities of the silver nanoparticles were examined by the standard Kirby– Bauer disc diffusion method on Muller– Hinton agar plates. The results showed the optimized silver nanoparticles were formed with an average size of 77. 30 nm and 0. 45 polydispersity index (PDI). The antibacterial property of the nanoparticles increased with their increasing concentrations and the maximum inhibition zones against B. cereus and S. marcescens were found 9. 66 mm and 10. 66 mm in 3000 µ g/ml concentration of silver nanoparticles, respectively. In despite of reducing the density of AgNPs from 3000 µ g/ml concentration to 500 and 100 µ g/ml concentrations, antibacterial activity against Bacillus cereus and S. marcescens were still visible. Consequently, the biosynthesized AgNPs has efficient antibacterial activity against B. cereus and S. marcescens. The results indicate that S. marcescens is approximately five times sensitive more than B. cereus to silver nanoparticles.

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APA: Copy

HAJMOHAMMADI, F., & HEMMAT, J.. (2019). Biosynthesis of silver nanoparticles and the comparison of their antibacterial activity against Bacillus cereus and Serratia marcescens. JOURNAL OF MOLECULAR AND CELLULAR RESEARCH (IRANIAN JOURNAL OF BIOLOGY), 32(1 ), 16-32. SID. https://sid.ir/paper/398147/en

Vancouver: Copy

HAJMOHAMMADI F., HEMMAT J.. Biosynthesis of silver nanoparticles and the comparison of their antibacterial activity against Bacillus cereus and Serratia marcescens. JOURNAL OF MOLECULAR AND CELLULAR RESEARCH (IRANIAN JOURNAL OF BIOLOGY)[Internet]. 2019;32(1 ):16-32. Available from: https://sid.ir/paper/398147/en

IEEE: Copy

F. HAJMOHAMMADI, and J. HEMMAT, “Biosynthesis of silver nanoparticles and the comparison of their antibacterial activity against Bacillus cereus and Serratia marcescens,” JOURNAL OF MOLECULAR AND CELLULAR RESEARCH (IRANIAN JOURNAL OF BIOLOGY), vol. 32, no. 1 , pp. 16–32, 2019, [Online]. Available: https://sid.ir/paper/398147/en

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