Characterization, antioxidant and antimicrobial activities of green synthesized silver nanoparticles from Psidium guajava L. leaf aqueous extracts

Wang, Lu; Wu, Ying; Xie, Jia; Wu, Sheng; Wu, Zhenqiang

doi:10.1016/j.msec.2018.01.003

Cited by 126 publications

(59 citation statements)

References 35 publications

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“…Regarding the particle-size distribution, all the prepared AgNPs were polydisperse, as revealed by the PDI value. This could be attributed to variations in the growth rates of individual particles during the nucleation step [28,29]. The Zeta-potential values of AgNPs indicated that stabilization of the synthesized AgNPs by the capping agents was evident, which is in agreement with literature [1].…”

Section: Measurement Of Dls and Zeta-potential Analysissupporting

confidence: 88%

“…Regarding the particle-size distribution, all the prepared AgNPs were polydisperse, as revealed by the PDI value. This could be attributed to variations in the growth rates of individual particles during the nucleation step [28,29]. The size measured by the nanoparticle nanosize analyzer (DLS) was, to some extent, larger compared with the measurements reported from SEM, which is expected as DLS measures the hydrodynamic size.…”

Section: Measurement Of Dls and Zeta-potential Analysismentioning

confidence: 94%

“…Generally, the suspensions that exhibit a Zeta potential lower than 20 mV are considered unstable and this results in the precipitation of particles from the solution. Interestingly, it was observed that Zeta-potential values were slightly elevated as the concentration of the extract increases, which is likely because of the presence of negatively-charged capping agents [1,28].…”

Section: Measurement Of Dls and Zeta-potential Analysismentioning

confidence: 99%

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Green Synthesis of Potent Antimicrobial Silver Nanoparticles Using Different Plant Extracts and Their Mixtures

et al. 2019

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Nano-sized metals have been introduced as a promising solution for microbial resistance to antimicrobial agents. Silver nanoparticles (AgNPs) have been proven to possess good antimicrobial activity. Green synthesis of AgNPs has been reported as safe, low cost and ecofriendly. This methodology uses extracts originating from different plants to reduce silver ions from AgNO 3 into nano-sized particles. In this study, extracts of several plants including ginger, garlic, capsicum and their mixtures were successfully used to produce AgNPs. Numerous spectroscopic, light scattering and microscopic techniques were employed to characterize the synthesized AgNPs. Agar well diffusion assay was performed to investigate the antimicrobial activity of AgNPs. The biosynthesized AgNPs have spherical shape with a size range of 20-70 nm. Garlic extract, pure or in mixture with ginger extract, generated AgNPs of the smallest size. The presence of the plant-origin capping agents surrounding AgNPs was proven by Fourier-transform infrared spectroscopy. The AgNPs, at a concentration of 50 µg/mL, demonstrated potent antimicrobial activity against Staphyloccocus aureus, Escherichia coli and Candida albicans as indicated by the zones of inhibitions. Our results revealed that AgNPs having potent antimicrobial activity could be prepared using different pure plant extracts and their mixtures.

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Section: Measurement Of Dls and Zeta-potential Analysissupporting

confidence: 88%

“…Regarding the particle-size distribution, all the prepared AgNPs were polydisperse, as revealed by the PDI value. This could be attributed to variations in the growth rates of individual particles during the nucleation step [28,29]. The size measured by the nanoparticle nanosize analyzer (DLS) was, to some extent, larger compared with the measurements reported from SEM, which is expected as DLS measures the hydrodynamic size.…”

Section: Measurement Of Dls and Zeta-potential Analysismentioning

confidence: 94%

Section: Measurement Of Dls and Zeta-potential Analysismentioning

confidence: 99%

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Green Synthesis of Potent Antimicrobial Silver Nanoparticles Using Different Plant Extracts and Their Mixtures

et al. 2019

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“…From the results, we can conclude that the increase of reaction time between the silver ions and biological reductant, leads to the synthesis of stable plasmonic peaks. Similar results were obtained by (Wang et al, 2018).…”

Section: Synthesis and Characterization Of Cp-agnpssupporting

confidence: 90%

Cytotoxic effects of Ceiba pentandra L. mediated silver nanoparticles on HCT-116 colon cancer cell lines through ROS generation and cell membrane damage

Brian

Selvi

2019

ijrps

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In this study, we assessed the biological effect of Ceiba pentandra bark silver nanoparticles (CP-AgNPs) on HCT-116 cancer cells with an emphasis on cell cytotoxicity, quantification of ROS and determination of mitochondria membrane potential. The synthesized Ceiba pentandra bark silver nanoparticles were characterized by UV-vis spectrometer, High-resolution transmission electron microscope (HR-TEM), X-ray diffraction (XRD) and Selected area electron diffraction (SAED). The synthesized silver nanoparticle cytotoxic and apoptotic effects were studied on colorectal cancer cells (HCT-116). The nanoparticles exhibited an inhibitory concentration (IC50) at (60μg/mL). CP-AgNPs significantly inhibited cell viability and changed the morphology of HCT-116 colon cancer cells. Moreover, CP-AgNPs increased the level of reactive oxygen species, induced cell apoptosis in HCT-116 cell lines through the interference of the mitochondrial membrane potential. These results indicated that Ceiba pentandra bark silver nanoparticles (CP-AgNPs) might act as prospective anticancer agents in colon cancer cells.

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“…Nevertheless, these techniques remain comparatively expensive and sometimes involve the use of some hazardous moieties. Consequently, the development of a green and effective method to develop AgNPs is of great importance 6,12,18,19,20,23,30,34,36 .…”

Section: Quick Response Codementioning

confidence: 99%

Untitled

2020

IJPSR

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Rumex obtusifolius, belonging to the Polygonaceae family, commonly known as 'broad-leaf-dock' is one of the most important medicinal plants. It is common wayside weeds and uses as an antidote to nettle, depurative, astringent, laxative, and tonic and in the treatment of sores, blisters, jaundice, burns, cancer, and tumors. In this study, we design to synthesize silver nanoparticles from silver nitrate via a green route using the aqueous leaf extracts of Rumex obtusifolius. This biogenic reduction of metal ion to base metal is quite rapid, readily conducted at room temperature and pressure, and easily scaled up. The use of silver nanoparticles is gaining popularity due to its antibacterial properties. The silver nanoparticles formation in the solution was monitored by UV-Vis spectroscopy, and further characterization was carried out by FT-IR (Fourier Transform Infrared Spectroscopy), XRD (X-ray Diffraction), SEM (Scanning Electron Microscopy) and TEM (Transmission Electron Microscopy) analysis. To optimize the biosynthesis of silver nanoparticles, the effect of process variables such as extract concentrations, the mixing ratio of the reactants, time, and pH were also investigated. The antibacterial activity of the synthesized silver nanoparticles was tested against some pathogenic bacteria like Staphylococcus aureus, Bacilius cereus, Escherichia coli, and Salmonella typhii and DMSO is used as a positive control.

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Characterization, antioxidant and antimicrobial activities of green synthesized silver nanoparticles from Psidium guajava L. leaf aqueous extracts

Cited by 126 publications

References 35 publications

Green Synthesis of Potent Antimicrobial Silver Nanoparticles Using Different Plant Extracts and Their Mixtures

Green Synthesis of Potent Antimicrobial Silver Nanoparticles Using Different Plant Extracts and Their Mixtures

Cytotoxic effects of Ceiba pentandra L. mediated silver nanoparticles on HCT-116 colon cancer cell lines through ROS generation and cell membrane damage

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