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Journal of Food Science and Biotechnology

Corresponding Author(s)

王文婷(1992—),女,博士,副教授,硕士研究生导师,主要从事植物天然产物活性研究。E-mail:wangwtsci@163.com

Abstract

[Objective ] The aim of this study is to investigate the structural characteristics,antibacterial activity,and antioxidant capacity of silver nanoparticles (AgNPs ) prepared from Phyllanthus emblica extract.[Method ] AgNPs were prepared with Phyllanthus emblica extract as a reducing agent.The structure of the AgNPs was characterized by X-ray diffraction (XRD ),scanning electron microscopy (SEM ),photon correlation spectroscopy (PCS ),and transmission electron microscopy (TEM ).Furthermore,the inhibitory effects of AgNPs at different mass concentrations on Escherichia coli ATCC 25922,Staphylococcus aureus ATCC 25933,and Pseudomonas aeruginosa PAO 1 were assessed,with the minimum inhibitory concentrations (MIC ) being determined.In addition,the superoxide anion and ABTS+ free radical scavenging abilities and the reducing capacity of AgNPs were determined.[Result ] The AgNPs prepared with Phyllanthus emblica extract presented a face-centered cubic structure with a particle size range from 10 to 30 nm and good dispersion.Their antibacterial properties gradually increased with the rising mass concentration of AgNPs.AgNPs had strong,moderate,and weak inhibitory effects on Escherichia coli ATCC 25922,Pseudomonas aeruginosa PAO 1,and Staphylococcus aureus ATCC 25933,with the MICs of 0.031,0.063,and 0.125 mg/mL,respectively.AgNPs at high mass concentrations exhibited strong antioxidant properties.At 1.000 to 2.000 mg/mL,AgNPs showed high superoxide anion and ABTS+ free radical scavenging abilities but weak reducing capacity.[Conclusion ] The AgNPs prepared by the green method from Pseudomonas emblica extract has good dispersion,strong antibacterial activity,and strong antioxidant capacity.The results provide scientific guidance for the research and development of AgNPs as a preservative and offer a reference for their future application in food preservation.

Publication Date

8-15-2025

First Page

107

Last Page

115

DOI

10.12441/spyswjs.20250623001

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