Bioinspired synthesis, characterization and antibacterial activity of plant-mediated silver nanoparticles using purple sweet potato root extract

Wang, L.; Xu, Hui; Gu, Liang; Han, Tingting; Wang, S.; Meng, Fanbin

doi:10.1080/10667857.2015.1105575

Cited by 17 publications

(6 citation statements)

References 30 publications

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“…They exhibited antibacterial activity and radical scavenging activity. Purple sweet potato ( Ipomoea batatas L.) root extract has been exploited to synthesize Ag NPs [ 143 ]. Organic components in the extract acted both as reducing and capping agents.…”

Section: Synthesis and Characterization Of Silver Nanoparticlesmentioning

confidence: 99%

A review on biosynthesis of silver nanoparticles and their biocidal properties

2018

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Use of silver and silver salts is as old as human civilization but the fabrication of silver nanoparticles (Ag NPs) has only recently been recognized. They have been specifically used in agriculture and medicine as antibacterial, antifungal and antioxidants. It has been demonstrated that Ag NPs arrest the growth and multiplication of many bacteria such as Bacillus cereus, Staphylococcus aureus, Citrobacter koseri, Salmonella typhii, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumonia, Vibrio parahaemolyticus and fungus Candida albicans by binding Ag/Ag+ with the biomolecules present in the microbial cells. It has been suggested that Ag NPs produce reactive oxygen species and free radicals which cause apoptosis leading to cell death preventing their replication. Since Ag NPs are smaller than the microorganisms, they diffuse into cell and rupture the cell wall which has been shown from SEM and TEM images of the suspension containing nanoparticles and pathogens. It has also been shown that smaller nanoparticles are more toxic than the bigger ones. Ag NPs are also used in packaging to prevent damage of food products by pathogens. The toxicity of Ag NPs is dependent on the size, concentration, pH of the medium and exposure time to pathogens.

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Section: Synthesis and Characterization Of Silver Nanoparticlesmentioning

confidence: 99%

A review on biosynthesis of silver nanoparticles and their biocidal properties

2018

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“…It is observed that AgNPs can anchor and then penetrate the bacterial membrane, and subsequently trigger the destruction of cell membrane and leakage of content 187 . Besides, AgNPs can influence crucial intracellular activities, such as attacking the respiratory chain, disturbing DNA replication and inhibiting cell division 188 . The antibacterial mechanisms of AgNPs are illustrated in Figure 3 .…”

Section: Medical Applications Of Agnpsmentioning

confidence: 99%

Silver nanoparticles: Synthesis, medical applications and biosafety

et al. 2020

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Silver nanoparticles (AgNPs) have been one of the most attractive nanomaterials in biomedicine due to their unique physicochemical properties. In this paper, we review the state-of-the-art advances of AgNPs in the synthesis methods, medical applications and biosafety of AgNPs. The synthesis methods of AgNPs include physical, chemical and biological routes. AgNPs are mainly used for antimicrobial and anticancer therapy, and also applied in the promotion of wound repair and bone healing, or as the vaccine adjuvant, anti-diabetic agent and biosensors. This review also summarizes the biological action mechanisms of AgNPs, which mainly involve the release of silver ions (Ag + ), generation of reactive oxygen species (ROS), destruction of membrane structure. Despite these therapeutic benefits, their biological safety problems such as potential toxicity on cells, tissue, and organs should be paid enough attention. Besides, we briefly introduce a new type of Ag particles smaller than AgNPs, silver Ångstrom (Å, 1 Å = 0.1 nm) particles (AgÅPs), which exhibit better biological activity and lower toxicity compared with AgNPs. Finally, we conclude the current challenges and point out the future development direction of AgNPs.

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“…Silver nanoparticles synthesized by purple sweet potato root extract ( Ipomoea batatas L.) had radical scavenging activity in vitro. Sweet potato root extract is full of glycoalkaloids, polyphenols, and anthocyanins acting as free radical scavengers and AgNP-capping by these molecules can be great antioxidants [ 217 ]. Elemike et al proposed that the antioxidant capacity of AgNPs was due to the presence of phenolic compounds, terpenoids, and flavonoids in plants that let nanoparticles act as singlet oxygen quenchers, hydrogen donors, and reducing agents [ 218 ].…”

Section: Biomedical Application Of Agnpsmentioning

confidence: 99%