Green synthesis of silver nanoparticles using Rhodobacter Sphaeroides

Bai, Haotian; Yang, Binsheng; Chai, Changchun; Guan-e, Yang; Jia, Wenping; Yi, Zhi-Ben

doi:10.1007/s11274-011-0747-x

Cited by 59 publications

(26 citation statements)

References 28 publications

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“…The present results showed that temperature had an appreciable effect on the synthesis rate and the size of AgNPs. Similar results were demonstrated by Bai et al (2011) and Jeevan et al (2012) using Rhodobacter sphaeroides and Pseudomonas aeruginosa, respectively, and the optimum temperature for AgNP synthesis was found to be 35 °C. Two other reports indicated that E. coli (Gurunathan et al, 2009) and Bacillus subtilis EWP-46 (Velmurugan et al, 2014) required a higher temperature (60 °C) to synthesize AgNPs.…”

Section: Discussionsupporting

confidence: 88%

Biogenic production of silver nanoparticles by Enterobacter cloacae Ism26

El-Baghdady¹,

El-Shatoury²,

Abdullah³

et al. 2018

Turk J Biol

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Introduction Synthesis of metal nanoparticles is an emerging area of nanoscience and nanotechnology since these particles exhibit peculiar properties based on their size, distribution, and morphology (Rai et al., 2014). These unique properties may provide new approaches and solutions to several industrial and environmental challenges in the areas of medicine, solar energy conversion, catalysis, and water treatment (Khalil et al., 2014; Rai et al., 2014). Recently, there has been growing interest in the preparation and study of silver nanoparticles (AgNPs) due to their extensive applications in different fields including wound and burn healing and bone and dental implants, and for their antibacterial, fungal, viral, protozoal, and arthropodal activities (Klaus et al., 1999; Khalil et al., 2014; Rai et al., 2014). The ecofriendly methods for AgNP synthesis have emerged as green alternatives to conventional chemical and physical methods. Different microorganisms such as Geobacter sulfurreducens, Morganella spp., and Pseudomonas stutzeri AG259 have been explored as potential biofactories for the synthesis and stabilization of

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Section: Discussionsupporting

confidence: 88%

Biogenic production of silver nanoparticles by Enterobacter cloacae Ism26

El-Baghdady¹,

El-Shatoury²,

Abdullah³

et al. 2018

Turk J Biol

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“…compared to A. fumigatus and this may be due to the fact that the faster growing Streptomyces may produce higher concentrations and different reductase enzymes than the A. fumigatus fungus. The role of NADH dependent nitrate reductase from fungi in the biosynthesis of silver nanoparticles was recently reported (Kumar et al 2007, Bai et al 2011). However, different NADH-dependent reductases may be produced also by Streptomyces sp.…”

Section: Resultsmentioning

confidence: 95%

“…It was found that cotton fabrics incorporated with silver nanoparticles displayed a significant antibacterial activity (Durán et al 2007). Recently, silver nanoparticles have been biosynthesized by a variety of microorganisms such as cyanobacteria (Lengke et al 2007), photosynthetic bacteria (Bai et al 2011) and fungi (Chen et al 2003;Vigneshwaran et al 2007;Basavaraja et al 2008). The biosynthesis of nanoparticles is affected by the species and even the strain of the microorganism as it is highly dependent upon the enzymes or other components produced by the cell that reduce AgNO 3 to Ag 0 , as well as the organism's tolerance to higher AgNO 3 concentrations.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of silver nanoparticles by a new strain of Streptomyces sp. compared with Aspergillus fumigatus

Alani

Moo‐Young

Anderson

2011

World J Microbiol Biotechnol

111

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Locally isolated strains of a thermoalkalotolerant Streptomyces sp. and Aspergillus fumigatus were used for the in vitro biosynthesis of silver nanoparticles from AgNO(3) solutions. An autolysed cell-free culture filtrate from each strain was used, indicating that the formation mechanism depends on intra-cellular components for both organisms, since culture broths had no significant nanoparticle formation potential. Nanoparticle formation was indicated by a change of the solution from colourless or light brown to dark brown after 24 h or more, and UV-visible spectroscopy and x-ray diffraction analysis confirmed the formation by both organisms. The initial formation kinetics were faster with Aspergillus, but formation continued for a longer period with Streptomyces, resulting in higher concentrations after 48 h. Transmission electron microscope images revealed well dispersed nanoparticles with diameters ranging from 15 to 45 nm from A. fumigatus, while those from Streptomyces sp. had a narrower size distribution of 15-25 nm. The higher productivity and preferred narrower size distribution of Streptomyces, together with its well established industrial use, may make it the preferred choice for further optimization studies.

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“…It is also evident that the increased antimicrobial activity of AgNPs may be attributed to its special characteristics of small size and high surface area to volume ratio [19]. The advantage of adapting biosynthesis of AgNPs is the simplicity of extracellular synthesis and downstream processing [20, 21]. …”

Section: Introductionmentioning

confidence: 99%

Biosynthesis, Antimicrobial and Cytotoxic Effect of Silver Nanoparticles Using a NovelNocardiopsissp. MBRC-1

Manivasagan

Venkatesan

Kalimuthu

et al. 2013

BioMed Research International

192

121

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The biosynthesis of nanoparticles has been proposed as a cost effective environmental friendly alternative to chemical and physical methods. Microbial synthesis of nanoparticles is under exploration due to wide biomedical applications, research interest in nanotechnology and microbial biotechnology. In the present study, an ecofriendly process for the synthesis of nanoparticles using a novel Nocardiopsis sp. MBRC-1 has been attempted. We used culture supernatant of Nocardiopsis sp. MBRC-1 for the simple and cost effective green synthesis of silver nanoparticles. The reduction of silver ions occurred when silver nitrate solution was treated with the Nocardiopsis sp. MBRC-1 culture supernatant at room temperature. The nanoparticles were characterized by UV-visible, TEM, FE-SEM, EDX, FTIR, and XRD spectroscopy. The nanoparticles exhibited an absorption peak around 420 nm, a characteristic surface plasmon resonance band of silver nanoparticles. They were spherical in shape with an average particle size of 45 ± 0.15 nm. The EDX analysis showed the presence of elemental silver signal in the synthesized nanoparticles. The FTIR analysis revealed that the protein component in the form of enzyme nitrate reductase produced by the isolate in the culture supernatant may be responsible for reduction and as capping agents. The XRD spectrum showed the characteristic Bragg peaks of 1 2 3, 2 0 4, 0 4 3, 1 4 4, and 3 1 1 facets of the face centered cubic silver nanoparticles and confirms that these nanoparticles are crystalline in nature. The prepared silver nanoparticles exhibited strong antimicrobial activity against bacteria and fungi. Cytotoxicity of biosynthesized AgNPs against in vitro human cervical cancer cell line (HeLa) showed a dose-response activity. IC50 value was found to be 200 μg/mL of AgNPs against HeLa cancer cells. Further studies are needed to elucidate the toxicity and the mechanism involved with antimicrobial and anticancer activity of the synthesized AgNPs as nanomedicine.

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Green synthesis of silver nanoparticles using Rhodobacter Sphaeroides

Cited by 59 publications

References 28 publications

Biogenic production of silver nanoparticles by Enterobacter cloacae Ism26

Biogenic production of silver nanoparticles by Enterobacter cloacae Ism26

Biosynthesis of silver nanoparticles by a new strain of Streptomyces sp. compared with Aspergillus fumigatus

Biosynthesis, Antimicrobial and Cytotoxic Effect of Silver Nanoparticles Using a NovelNocardiopsissp. MBRC-1

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