Biosynthesis of silver nanoparticles using Cassia tora leaf extract and its antioxidant and antibacterial activities

Saravanakumar, Arthanari; Ganesh, Mani; Jayaprakash, Jayabalan; Jang, Hee-Jin

doi:10.1016/j.jiec.2015.03.003

Cited by 94 publications

(36 citation statements)

References 33 publications

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“…Over the recent years, biosynthesis method has been widely studied for stable metal nanoparticles synthesis with controlled size and shape and considered as a "green" approach [5][6][7][8]. Among them, plant leaf extract mediated biological process has attracted much attention due to the simple and inexpensive protocol [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Rapid Biological Synthesis of Silver Nanoparticles from Ocimum sanctum and Their Characterization

Khan

Tarek

Nuzat

et al. 2017

Journal of Nanoscience

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With development of nanotechnology, the biological synthesis process deals with the synthesis, characterization, and manipulation of materials and further development at nanoscale which is the most cost-effective and eco-friendly and rapid synthesis process as compared to physical and chemical process. In this research silver nanoparticles (AgNPs) were synthesized from silver nitrate (AgNO 3 ) aqueous solution through eco-friendly plant leaf broth of Ocimum sanctum as reactant as well as capping agent and stabilizer. The formation of AgNPs was monitored by ultraviolet-visible spectrometer (UV-vis) and Fourier transform infrared (FTIR) spectroscopy. X-ray diffraction (XRD) and scanning electronic microscopy (SEM) have been used to characterize the morphology of prepared AgNPs. The peaks in XRD pattern are in good agreement with that of face-centered-cubic (FCC) form of metallic silver. Thermal gravimetric analysis/differential thermal analysis (TGA/DTA) results confirmed the weight loss and the exothermic reaction due to desorption of chemisorbed water. The average grain size of silver nanoparticles is found to be 29 nm. The FTIR results indicated that the leaf broths containing the carboxyl, hydroxyl, and amine groups are mainly involved in fabrication of silver AgNPs and proteins, which have amine groups responsible for stabilizing AgNPs in the solution.

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Section: Introductionmentioning

confidence: 99%

Rapid Biological Synthesis of Silver Nanoparticles from Ocimum sanctum and Their Characterization

Khan

Tarek

Nuzat

et al. 2017

Journal of Nanoscience

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“…The "phenolic compounds" expression embraces a considerable range of substances that possess an aromatic ring bearing one or more hydroxyl substituents. The structure of natural polyphenols varies from simple molecules, such as phenolic acids, to highly polymerized compounds, such as condensed tannins [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The substituent effect on the antioxidant capacity of catechols and resorcinols

2016

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effect. The combination of a double bond with a -COOH group, in the substituent, increases the BDE and reduces the electron donor capacity, and this result suggests that this combination induces a reduction in the antioxidant capacity in one polyphenol compound. In several reports, an intramolecular hydrogen bond has been proposed within to the most stable structure of catechol. However, by using arguments from the atoms in molecules approach and the electron localization function, we show that such an interaction is not relevant to stabilize this conformation and consequently and this is the reason that explains the unimportance of this interaction in the properties studied here and in previous studies.

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“…The highest percentage of inhibition monitored in AgNPs was 61%, which was lower than that of ascorbic acid at 450 µg/mL (92%). Similar studies with enhanced DPPH scavenging activity by AgNPs from leaf extracts 35 have been investigated, and enhanced DPPH scavenging properties by selenium-, platinum-, torolex-, and chitosan-coated gold NPs 36-39 have also been reported.…”

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confidence: 59%

“…34 A more intense peak was observed at 1,624 cm -1 , signifying the presence of carbonyl (C-O) stretching vibrations. 35 The medium-intensity peak at 1,398 cm -1 , which is absent from the AgNPs FT-IR spectrum, was assigned to the C-N stretching vibrations of aromatic Based on the earlier observations, we may conclude that functional groups such as hydroxyl, amide, and carbonyl present in the A. marschalliana extract might be responsible for the bioreduction of Ag + to AgNPs.…”

Section: Xrd Analysismentioning

confidence: 71%

Phytosynthesis of silver nanoparticles using Artemisia marschalliana Sprengel aerial part extract and assessment of their antioxidant, anticancer, and antibacterial properties

Salehi

Shandiz

Ghanbar

et al. 2016

IJN

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A rapid phytosynthesis of silver nanoparticles (AgNPs) using an extract from the aerial parts of Artemisia marschalliana Sprengel was investigated in this study. The synthesized AgNPs using A. marschalliana extract was analyzed by UV–visible spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy and further characterized by transmission electron microscopy, scanning electron microscopy, zeta potential, and energy-dispersive spectroscopy. Characteristic absorption bands of AgNPs were found near 430 nm in the UV–vis spectrum. Energy-dispersive spectroscopy analysis of AgNPs in the energy range 2–4 keV confirmed the silver signal due to surface plasmon resonance. Scanning electron microscopy and transmission electron microscopy results revealed that the AgNPs were mostly spherical with an average size ranging from 5 nm to 50 nm. The zeta potential value of −31 mV confirmed the stability of the AgNPs. AgNPs produced using the aqueous A. marschalliana extract might serve as a potent in vitro antioxidant, as revealed by 2,2-diphenyl-1-picryl hydrazyl assay. The present study demonstrates the anticancer properties of phytosynthesized AgNPs against human gastric carcinoma AGS cells. AgNPs exerted a dose-dependent inhibitory effect on the viability of cells. Real-time polymerase chain reaction was used for the investigation of Bax and Bcl-2 gene expression in cancer and normal cell lines. Our findings show that the mRNA levels of pro-apoptotic Bax gene expression were significantly upregulated, while the expression of anti-apoptotic Bcl-2 was declined in cells treated with AgNPs compared to normal cells. In addition, flow cytometric analysis showed that the number of early and late apoptotic AGS cells was significantly enhanced following treatment with AgNPs as compared to untreated cells. In addition, the AgNPs showed strong antibacterial properties against tested pathogenic bacteria such as Staphylococcus aureus , Bacillus cereus , Acinetobacter baumannii , and Pseudomonas aeruginosa . Based on the obtained data, we suggest that phytosynthesized AgNPs are good alternatives in the treatment of diseases because of the presence of bioactive agents.

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Biosynthesis of silver nanoparticles using Cassia tora leaf extract and its antioxidant and antibacterial activities

Cited by 94 publications

References 33 publications

Rapid Biological Synthesis of Silver Nanoparticles from Ocimum sanctum and Their Characterization

Rapid Biological Synthesis of Silver Nanoparticles from Ocimum sanctum and Their Characterization

The substituent effect on the antioxidant capacity of catechols and resorcinols

Phytosynthesis of silver nanoparticles using Artemisia marschalliana Sprengel aerial part extract and assessment of their antioxidant, anticancer, and antibacterial properties

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