Discovery of high antibacterial and catalytic activities of biosynthesized silver nanoparticles using C. fruticosus (CF-AgNPs) against multi-drug resistant clinical strains and hazardous pollutants

Shirzadi‐Ahodashti, Mina; Mizwari, Zirar M.; Hashemi, Zahra; Rajabalipour, Saba; Ghoreishi, Seyedeh Masoumeh; Mortazavi‐Derazkola, Sobhan; Ebrahimzadeh, Mohammad Ali

doi:10.1016/j.eti.2021.101607

Cited by 57 publications

(15 citation statements)

References 41 publications

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“…Considering that Gram-negative bacteria are enclosed by a lipopolysaccharide-containing outer membrane that serves as a barrier to antibacterial agents, the interactions of the lipophilic components of antibacterial materials with the surfaces of Gram-negative bacteria are extremely important [ 23 ]. Therefore, the investigation of the relationships between the physicochemical properties of polymer-modified metal oxide NPs and their lipophilicity and antibacterial activity towards Gram-negative bacteria, which have yet to be fully elucidated, is of great interest to many researchers [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Characteristics and Antibacterial Activity of Polymer-Modified Copper Oxide Nanoparticles

Chen

Liao

Lin

et al. 2021

IJMS

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The proliferation of drug-resistant pathogens continues to increase, giving rise to serious public health concerns. Many researchers have formulated metal oxide nanoparticles for use as novel antibacterial agents. In the present study, copper oxide (CuO) was synthesized by simple hydrothermal synthesis, and doping was performed to introduce different polymers onto the NP surface for bacteriostasis optimization. The polymer-modified CuO NPs were analyzed further with XRD, FTIR, TEM, DLS and zeta potential to study their morphology, size, and the charge of the substrate. The results indicate that polymer-modified CuO NPs had a significantly higher bacteriostatic rate than unmodified CuO NPs. In particular, polydopamine (PDA)-modified CuO (CuO-PDA) NPs, which carry a weakly negative surface charge, exhibited excellent antibacterial effects, with a bacteriostatic rate of up to 85.8 ± 0.2% within 3 h. When compared to other polymer-modified CuO NPs, CuO-PDA NPs exhibited superior bacteriostatic activity due to their smaller size, surface charge, and favorable van der Waals interactions. This may be attributed to the fact that the CuO-PDA NPs had relatively lipophilic structures at pH 7.4, which increased their affinity for the lipopolysaccharide-containing outer membrane of the Gram-negative bacterium Escherichia coli.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Characteristics and Antibacterial Activity of Polymer-Modified Copper Oxide Nanoparticles

Chen

Liao

Lin

et al. 2021

IJMS

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“…While cinnamon leaves, garlic, basil leaves, curry leaves, ginger root, and mustard exhibit antibacterial properties against a wide range of both Gram-negative and Gram-positive bacteria (Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, Escherichia coli (E. coli), and Salmonella infantis) [19], extracts of cruciferous vegetables show resistance against Gram-negative bacteria [20]. Besides, the application of innovative techniques such as biosynthesis of nanoparticles using extracts with antioxidant and antibaterial activity could enhance antibacterial properties [21,22].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Phytochemical Contents, Antioxidant and Antibacterial Activities of Various Solvent Extracts Obtained from ‘Maluma’ Avocado Pulp Powder

Nguyen

et al. 2021

Molecules

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Although avocado is a superfood rich in phytochemicals with high antioxidant activities, studies on the antibacterial properties of its pulp are limited, except for seed and peel portions. In this study, three types of solvent (acetone, methanol, and diethyl ether) were used to obtain the extracts from “Maluma” avocado pulp powder prepared by infrared drying. The extracts were analyzed for total polyphenols, phytopigments (total chlorophylls and carotenoids), antioxidant activities (ferric-reducing antioxidant power (FRAP), 2,2-Diphenyl-1-picrylhydrazyl (DPPH), and 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assays), and antibacterial activities against seven pathogens (Shigella sonnei ATCC 9290, Escherichia coli ATCC 8739, Salmonella typhi ATCC 6539, Vibrio parahaemolyticus ATCC 17802, Proteus mirabilis ATCC 25933, Staphylococcus aureus ATCC 6538, and Bacillus cereus ATCC 11778). The results showed that the acetone solvent could extract the highest polyphenols and chlorophylls with the highest antioxidant activity in terms of ABTS and DPPH assays. In contrast, diethyl ether exhibited the most significant content of carotenoids and FRAP values. However, the methanol extract was the best solvent, exerting the strongest antibacterial and meaningful antioxidant activities. For the bacterial activities, Gram-positive pathogens (Bacillus cereus and Staphylococcus aureus) were inhibited more efficiently by avocado extracts than Gram-negative bacteria. Therefore, the extracts from avocado powder showed great potential for applications in food processing and preservation, pharmaceuticals, and cosmetics.

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“…The results of XRD analysis showed that the diffraction peaks appeared at 38.09°, 44.2°, 64.52°, and 77.43° corresponding to (111), (200), (220), and (311) Bragg planes, respectively. [ 45 ] Also, the size of synthesized nanoparticles was calculated using the Debye–Scherrer equation:

normalD = nλ/βcosθ

…”

Section: Resultsmentioning

confidence: 99%

“…Concentration optimization: to optimize the concentration, the extract was brought to pH = 12 with sodium hydroxide 2 M. Then, at room temperature condition, different concentrations of silver nitrate (5, 10, 15, 20, and 25 mM) were added to see at what concentration the highest efficiency of silver nanoparticles is obtained. Time optimization: the green synthesis of silver nanoparticles at different times (15,30,45, and 60 min) after the reaction was evaluated to see when the maximum adsorption intensity is achieved. Temperature optimization: considering the optimal concentration and time, the extract solution was added separately to the optimal concentration of silver nitrate at ambient temperature, 55 C and 85 C to determine the optimal reaction temperature by absorption spectrum studies.…”

Section: Optimization Of Silver Nanoparticles Synthesized Using P Khi...mentioning

confidence: 99%

Photochemical synthesis of metallic silver nanoparticles using Pistacia khinjuk leaves extract (PKL@AgNPs) and their applications as an alternative catalytic, antioxidant, antibacterial, and anticancer agents

Zare-Bidaki

Mohammadparast-Tabas

Peyghambari

et al. 2021

Applied Organom Chemis

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In recent decades, antimicrobial resistance of different bacteria against various antibiotics and contamination of water resources by various dyes has been one of the most important human problems. Therefore, in this research, biogenic silver nanoparticles were synthesized using nontoxic and rapid approach using Pistacia khinjuk leaves extract (P. khinjuk) as compatible and safe reducing agent (PKL@AgNPs). Nanoparticle optimization experiments were performed at different times, temperatures and concentrations in order to achieve the most optimal conditions. The biosynthesized AgNPs were characterized in terms crystalline, morphology and structural. The Fourier-transform infrared spectroscopy (FT-IR) spectra showed that the phenol compounds present in the P. khinjuk leaves extract were responsible for silver ion (Ag + ) reduction and stabilization of AgNPs (Ag 0 ). X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) analysis results revealed that the product were facecentered cubic structure, homogeneous, uniformly, oval-like and spherical morphology with size of about 35-45 nm. The biosynthesized AgNPs exhibited a high photocatalytic activity for the degradation of the methylene blue (MB) and methyl orange (MO) as hazardous contaminants. The degradation efficiency of PKL@AgNPs for MB and MO pollutants were 93.2% and 85.37% under UV and 75.18% and 70.03% under sun-light irradiations, respectively. Furthermore, the PKL@AgNPs showed strong antibacterial and antifungal activities against Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, Streptococcus mutans, Streptococcus mitis, Enterococcus faecalis, and Candida albicans with minimum inhibitory concentration (MIC) values of 0.58, 0.58, 0.58, 1.17, 2.34, 1.17, and 0.15 μg ml À1 , respectively. The antioxidant activity of PKL@AgNPs was calculated and the results revealed that the percentage of DPPH inhibition increased (3.8% to 69.9%) with increasing the concentration of nanoparticles. Also, the PKL@AgNPs also revealed significant

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Discovery of high antibacterial and catalytic activities of biosynthesized silver nanoparticles using C. fruticosus (CF-AgNPs) against multi-drug resistant clinical strains and hazardous pollutants

Cited by 57 publications

References 41 publications

Investigation of the Characteristics and Antibacterial Activity of Polymer-Modified Copper Oxide Nanoparticles

Investigation of the Characteristics and Antibacterial Activity of Polymer-Modified Copper Oxide Nanoparticles

Comparison of Phytochemical Contents, Antioxidant and Antibacterial Activities of Various Solvent Extracts Obtained from ‘Maluma’ Avocado Pulp Powder

Photochemical synthesis of metallic silver nanoparticles using Pistacia khinjuk leaves extract (PKL@AgNPs) and their applications as an alternative catalytic, antioxidant, antibacterial, and anticancer agents

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