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Characterization, antioxidant and antimicrobial activities of green synthesized silver nanoparticles from Psidium guajava L. leaf aqueous extracts.
Mater Sci Eng C Mater Biol Appl. 2018 May 01; 86:1-8.MS

Abstract

The green synthesis of nanoparticles has become increasingly promising due to their potential applications in nanomedicine and materials science. In this study, silver nanoparticles (P-AgNPs) were synthesized from aqueous extracts of P. guajava L. leaf. The synthesized silver nanoparticles were confirmed by UV-vis spectrophotometry at 438 nm. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and zetasizer analyses showed that the average sizes of the P-AgNPs were 20-35 nm, 25 nm, and 25-35 nm, respectively. Element mapping analyses of the P-AgNPs were confirmed by X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) analyses. Moreover, FTIR spectra of the synthesized P-AgNPs showed the presence of phyto constituents as capping agents. Zeta potential measurements (-20.17 mV) showed that the synthesized P-AgNPs had reasonably good stability. The in vitro antioxidant properties of the P-AgNPs were evaluated using two different methods. A highly efficient radical scavenging activity of P-AgNPs possessing IC50 values of 52.53 ± 0.31 μg/mL (DPPH) and 55.10 ± 0.29 μg/mL (ABTS+) were confirmed. At a concentration of 100 μg/mL, antimicrobial activity assays of the P-AgNPs showed significant inhibition against selected bacteria, S. cerevisiae, A. niger and R. oryzae, especially against Alcaligenes faecalis and Escherichia coli. The present study revealed that the low-cost and environmentally friendly synthesis of P-AgNPs can be widely used in biomedicine, water treatment or purification, and nanobiotechnology.

Authors+Show Affiliations

School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China.School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China.School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China.School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China.School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China. Electronic address: btzhqwu@scut.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29525084

Citation

Wang, Lu, et al. "Characterization, Antioxidant and Antimicrobial Activities of Green Synthesized Silver Nanoparticles From Psidium Guajava L. Leaf Aqueous Extracts." Materials Science & Engineering. C, Materials for Biological Applications, vol. 86, 2018, pp. 1-8.
Wang L, Wu Y, Xie J, et al. Characterization, antioxidant and antimicrobial activities of green synthesized silver nanoparticles from Psidium guajava L. leaf aqueous extracts. Mater Sci Eng C Mater Biol Appl. 2018;86:1-8.
Wang, L., Wu, Y., Xie, J., Wu, S., & Wu, Z. (2018). Characterization, antioxidant and antimicrobial activities of green synthesized silver nanoparticles from Psidium guajava L. leaf aqueous extracts. Materials Science & Engineering. C, Materials for Biological Applications, 86, 1-8. https://doi.org/10.1016/j.msec.2018.01.003
Wang L, et al. Characterization, Antioxidant and Antimicrobial Activities of Green Synthesized Silver Nanoparticles From Psidium Guajava L. Leaf Aqueous Extracts. Mater Sci Eng C Mater Biol Appl. 2018 May 1;86:1-8. PubMed PMID: 29525084.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Characterization, antioxidant and antimicrobial activities of green synthesized silver nanoparticles from Psidium guajava L. leaf aqueous extracts. AU - Wang,Lu, AU - Wu,Yanan, AU - Xie,Jia, AU - Wu,Sheng, AU - Wu,Zhenqiang, Y1 - 2018/02/16/ PY - 2017/04/04/received PY - 2017/09/11/revised PY - 2018/01/13/accepted PY - 2018/3/12/entrez PY - 2018/3/12/pubmed PY - 2018/8/28/medline KW - Antimicrobial activity KW - Antioxidant activity KW - Composite materials KW - Psidium guajava L. KW - Silver nanoparticles SP - 1 EP - 8 JF - Materials science & engineering. C, Materials for biological applications JO - Mater Sci Eng C Mater Biol Appl VL - 86 N2 - The green synthesis of nanoparticles has become increasingly promising due to their potential applications in nanomedicine and materials science. In this study, silver nanoparticles (P-AgNPs) were synthesized from aqueous extracts of P. guajava L. leaf. The synthesized silver nanoparticles were confirmed by UV-vis spectrophotometry at 438 nm. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and zetasizer analyses showed that the average sizes of the P-AgNPs were 20-35 nm, 25 nm, and 25-35 nm, respectively. Element mapping analyses of the P-AgNPs were confirmed by X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) analyses. Moreover, FTIR spectra of the synthesized P-AgNPs showed the presence of phyto constituents as capping agents. Zeta potential measurements (-20.17 mV) showed that the synthesized P-AgNPs had reasonably good stability. The in vitro antioxidant properties of the P-AgNPs were evaluated using two different methods. A highly efficient radical scavenging activity of P-AgNPs possessing IC50 values of 52.53 ± 0.31 μg/mL (DPPH) and 55.10 ± 0.29 μg/mL (ABTS+) were confirmed. At a concentration of 100 μg/mL, antimicrobial activity assays of the P-AgNPs showed significant inhibition against selected bacteria, S. cerevisiae, A. niger and R. oryzae, especially against Alcaligenes faecalis and Escherichia coli. The present study revealed that the low-cost and environmentally friendly synthesis of P-AgNPs can be widely used in biomedicine, water treatment or purification, and nanobiotechnology. SN - 1873-0191 UR - https://www.unboundmedicine.com/medline/citation/29525084/Characterization_antioxidant_and_antimicrobial_activities_of_green_synthesized_silver_nanoparticles_from_Psidium_guajava_L__leaf_aqueous_extracts_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0928-4931(17)31247-X DB - PRIME DP - Unbound Medicine ER -