Green synthesis of silver nanoparticles using leaf extract of medicinally potent plant Saraca indica: a novel study

Shyam, Perugu; Nagati, Veerababu; Bhanoori, Manjula

doi:10.1007/s13204-015-0486-7

Cited by 59 publications

(14 citation statements)

References 16 publications

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“…Generally, appearance of brown color indicates the production of AgNPs due to SPR phenomenon. Similar indications were also reported [22,24]. Many studies reported that spherical AgNPs show maximum absorbance between 400 nm to 450 nm.…”

Section: Discussionsupporting

confidence: 82%

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Green Synthesis, Characterization and Antibacterial Activity of Silver Nanoparticles of Endophytic Fungi Aspergillus terreus

Rani¹,

Sharma²,

Chaturvedi³

et al. 2017

J Nanomed Nanotechnol

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Section: Discussionsupporting

confidence: 82%

“…It mainly showed the presence of carboxylic acids, esters, and steroids. They are reported to involve in the synthesis of nanoparticles [21,22]. It was previously reported that secondary metabolites present in endophytic fungi are responsible for synthesis and stabilization of AgNPs [8].…”

Section: Discussionmentioning

confidence: 99%

Green Synthesis, Characterization and Antibacterial Activity of Silver Nanoparticles of Endophytic Fungi Aspergillus terreus

Rani¹,

Sharma²,

Chaturvedi³

et al. 2017

J Nanomed Nanotechnol

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“…Ag-NPs have been obtained with sizes between 50 and 250 nm using Carica papaya leaf extract; 53 with average sizes 23±12, 32±24 and 19±22 nm using Illicium verum (star anise) seed extracts, 54 and average size 73 nm using an aqueous extract of Tephrosia tinctoria. 55 Regarding spherical shape homogeneity, our synthesis method was compared with that of other works where spherical Ag-NPs are synthesized, such as in the case of other green synthesis methods that employ leaf extracts of Saraca indica, 56 Ficus carica, 57 and Cocos nucifera. 58 The chemical and physical characterization of the Ag-NP samples suggests that the Acacia extract is capable of not only reducing the silver ions but also capping the Ag-NPs and stabilizing their surface.…”

Section: Discussion Synthesis and Characterization Of Ag-npsmentioning

confidence: 99%

In vivo antimicrobial activity of silver nanoparticles produced via a green chemistry synthesis using <em>Acacia rigidula</em> as a reducing and capping agent

Escárcega‐González¹,

Garza-Cervantes²,

Vázquez-Rodríguez³

et al. 2018

IJN

136

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IntroductionOne of the main issues in the medical field and clinical practice is the development of novel and effective treatments against infections caused by antibiotic-resistant bacteria. One avenue that has been approached to develop effective antimicrobials is the use of silver nanoparticles (Ag-NPs), since they have been found to exhibit an efficient and wide spectrum of antimicrobial properties. Among the main drawbacks of using Ag-NPs are their potential cytotoxicity against eukaryotic cells and the latent environmental toxicity of their synthesis methods. Therefore, diverse green synthesis methods, which involve the use of environmentally friendly plant extracts as reductive and capping agents, have become attractive to synthesize Ag-NPs that exhibit antimicrobial effects against resistant bacteria at concentrations below toxicity thresholds for eukaryotic cells.PurposeIn this study, we report a green one-pot synthesis method that uses Acacia rigidula extract as a reducing and capping agent, to produce Ag-NPs with applications as therapeutic agents to treat infections in vivo.Materials and methodsThe Ag-NPs were characterized using transmission electron microscopy (TEM), high-resolution TEM, selected area electron diffraction, energy-dispersive spectroscopy, ultraviolet–visible, and Fourier transform infrared.ResultsWe show that Ag-NPs are spherical with a narrow size distribution. The Ag-NPs show antimicrobial activities in vitro against Gram-negative (Escherichia coli, Pseudomonas aeruginosa, and a clinical multidrug-resistant strain of P. aeruginosa) and Gram-positive (Bacillus subtilis) bacteria. Moreover, antimicrobial effects of the Ag-NPs, against a resistant P. aeruginosa clinical strain, were tested in a murine skin infection model. The results demonstrate that the Ag-NPs reported in this work are capable of eradicating pathogenic resistant bacteria in an infection in vivo. In addition, skin, liver, and kidney damage profiles were monitored in the murine infection model, and the results demonstrate that Ag-NPs can be used safely as therapeutic agents in animal models.ConclusionTogether, these results suggest the potential use of Ag-NPs, synthesized by green chemistry methods, as therapeutic agents against infections caused by resistant and nonresistant strains.

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“…41 42 The SPR band is highly sensible to the size and shape of the nanoparticles, which depend directly on the concentration of the extract and silver nitrate, and the type of biomolecules present in the plant extract. 43 Maximum absorption peaks at longer wavelengths suggest bigger sizes in the nanoparticles, on the other hand particles with smaller diameters interact with light at shorter wavelengths. 44 45 The characteristic SPR band, is due to the collective oscillation of the electrons located in the conduction band when they interact with light.…”

Section: Uv-vis Spectra Analysismentioning

confidence: 99%

Biosynthesis of Silver Nanoparticles Using Mint Leaf Extract (Mentha piperita) and Their Antibacterial Activity

Morales¹,

Oca-Vásquez²,

Alvarado-Marchena³

et al. 2017

adv sci engng med

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Nowadays, it has become urgently necessary to change the traditional methods of synthesis of metallic nanoparticles, and to start using safer and more eco-friendly approaches. In the present work a green synthesis of silver nanoparticles was carried out using mint leaf extract (Mentha piperita) as the reducing and stabilizing agent. Silver nanoparticles were synthesized using a 1 mM silver nitrate solution and varying the volume of the extract (150, 250, 350 L), at a temperature of 30 C for 24 h. The formation of silver nanoparticles was monitored by a UV-Visible spectrophotometer which showed absorption peaks ranging from 438-470 nm. Atomic Force Microscopy and Transmission Electron Microscopy analysis showed that the silver nanoparticles presented different morphologies. For the treatment with 150 l of extract, the silver nanoparticles were mostly spherical and for the other two treatments we observed spherical, triangular, hexagonal and irregular morphologies of the nanoparticles. Dynamic Light Scattering analysis determined a mean size of 50 nm for all of the treatments, with zeta potential values ranging from −20 to −23 mV. The results showed that the synthesized silver nanoparticles had antibacterial activity against pathogenic bacteria such as Escherichia coli and Staphylococcus aureus. The minimum inhibitory concentration required for S. aureus was 11.1, 26.3 and 51.5 g · ml −1 , for the treatments of 150, 250 and 350 l of extract, respectively. All of these values were higher than for E. coli, which presented a Minimum Inhibitory Concentration of 2.49 g · ml −1 . This work offers a quick, simple and non-toxic method for the synthesis of silver nanoparticles.

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Green synthesis of silver nanoparticles using leaf extract of medicinally potent plant Saraca indica: a novel study

Cited by 59 publications

References 16 publications

Green Synthesis, Characterization and Antibacterial Activity of Silver Nanoparticles of Endophytic Fungi Aspergillus terreus

Green Synthesis, Characterization and Antibacterial Activity of Silver Nanoparticles of Endophytic Fungi Aspergillus terreus

In vivo antimicrobial activity of silver nanoparticles produced via a green chemistry synthesis using <em>Acacia rigidula</em> as a reducing and capping agent

Biosynthesis of Silver Nanoparticles Using Mint Leaf Extract (Mentha piperita) and Their Antibacterial Activity

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