Evaluation of the catalytic, antibacterial and anti-biofilm activities of the Convolvulus arvensis extract functionalized silver nanoparticles

Hamedi, Sepideh; Shojaosadati, Seyed Abbas; Mohammadi, Aref

doi:10.1016/j.jphotobiol.2016.12.025

Cited by 102 publications

(53 citation statements)

References 52 publications

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“…X-ray diffraction technique is used to determine the crystalline nature and elemental composition of T. spicata (Ts2AgNPs)-mediated nanoparticles (Figure 2(A)). XRD spectra of the prepared silver nanoparticles indicated four diffraction bands at 2h ¼ 38.15, 44.33, 64.50 and 77.47, which are the characteristic Bragg's diffraction plans (111), (200), (220) and (310) of the face-centered cubic crystalline structure of silver, respectively, matching the database of the Joint Committee on powder diffraction standards (JCPDS) file no: 04-0783 [30]. The mean crystal size of the Ts2AgNPs was calculated approximately as 10 nm according to the Debye-Scherrer's formula:…”

Section: Synthesis and Characterization Of Agnpsmentioning

confidence: 56%

Green synthesis of silver nanoparticles using Thymbra spicata L. var. spicata (zahter) aqueous leaf extract and evaluation of their morphology-dependent antibacterial and cytotoxic activity

Erci

Çakır-Koç

Işıldak

2017

Artificial Cells, Nanomedicine, and Biotechnology

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Silver (Ag) nanoparticles (NPs) were green synthesized at room temperature using different concentrations of the Thymbra spicata L. var. spicata (Zahter) aqueous leaf extracts for the first time. With the synthesis of AgNPs using the leaf extract of Cynara scolymus (Artichoke) and Mentha piperita (Peppermint), the biological activities of the nanoparticles synthesized using leaf extract of three economically significant plants have been studied comparatively. Nanoparticles were characterized by different spectroscopic and microscopic analysis. TEM analysis of the biosynthesized AgNPs revealed that the size and shape of the AgNPs were changed with the plant extract concentration. Biologically synthesized AgNPs from leaf extracts of the three different plants displayed significant differences in antibacterial activity against two different gram-negative and gram-positive bacteria. Also, the results from this study show the shape dependence of the antibacterial and cytotoxic activity of silver nanoparticles synthesized using T. spicata leaf extract. The nanoparticles with different shapes exhibited the strongest antibacterial and cytotoxic activity compared to mostly spherical nanoparticles. Present results clearly indicate that biological activities of silver nanoparticles were affected by nanoparticle shape and the source of the plant extract used in the synthesis.

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Section: Synthesis and Characterization Of Agnpsmentioning

confidence: 56%

Green synthesis of silver nanoparticles using Thymbra spicata L. var. spicata (zahter) aqueous leaf extract and evaluation of their morphology-dependent antibacterial and cytotoxic activity

Erci

Çakır-Koç

Işıldak

2017

Artificial Cells, Nanomedicine, and Biotechnology

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“…3c. Four Bragg's reflections planes in the 2θ correspond to the planes of (1 1 1), (2 0 0), (2 2 0) and (3 1 1) which can be indexed according to the facets of face-centered cubic crystal structure of silver 49 . www.nature.com/scientificreports www.nature.com/scientificreports/ The solid-state characterization of AgNPs was also performed using thermogravimetric and differential thermal analyses (TG/DTA).…”

Section: Morphology Of Agnps Containing Nanofilmsmentioning

confidence: 99%

Facile preparation of a novel biogenic silver-loaded Nanofilm with intrinsic anti-bacterial and oxidant scavenging activities for wound healing

Bardania

Mahmoudi

Bagheri

et al. 2020

Sci Rep

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To eliminate the microbial infection from an injury site, various modalities have been developed such as dressings and human skin substitutes. However, the high amount of reactive oxygen species, microbial infection, and damaging extracellular matrix remain as the main challenges for the wound healing process. In this study, for the first time, green synthesized silver nanoparticles (AgNPs) using Teucrium polium extract were embedded in poly lactic acid/poly ethylene glycol (PLA/PEG) film to provide absorbable wound dressing, with antioxidant and antibacterial features. The physicochemical analysis demonstrated, production of AgNPs with size approximately 32.2 nm and confirmed the presence of phytoconstituents on their surface. The antibacterial assessments exhibited a concentration-dependent sensitivity of Staphylococcus aureus and Pseudomonas aeruginosa toward biosynthesized AgNPs, which showed a suitable safety profile in human macrophage cells. Furthermore, oxidant scavenging assays demonstrated exploitation of plant extract as a reducing agent, endows antioxidant activity to biogenic AgNPs. The formation of PLA/PEG nanofilm and entrapment of AgNPs into their matrix were clearly confirmed by scanning electron microscopy. More importantly, antibacterial examination demonstrated that the introduction of biogenic AgNPs into PLA/PEG nanofibers led to complete growth inhibition of P. aeruginosa and S. aureus. In summary, the simultaneous antioxidant activity and antimicrobial activity of the novel biogenic AgNPs/PLA/PEG nanofilm showed its potential for application as wound dressing.activities of porous Ag nanofilm were investigated. We anticipate that the Ag nanofilm wound dressing with free radical scavenging capacity would enhance the wound healing process. Moreover, this study proposed a low-cost and facile method for preparation of Ag nanofilm as a potential wound dressing. Materials and MethodsMaterials. Methanol (CH 3 OH, 99.9%), silver nitrate (AgNO 3 ), nutrient agar, ferric chloride hexahydrate (FeCl 3 , 6H 2 O), iron (II) sulfate tetrahydrate (FeSO 4 .4H 2 O), dichloromethane, polyethylene glycol 300, ascorbic acid and Mueller-Hinton agar (MHA) were purchased from Merck (Germany). 2,2-diphenyl-1-picrylhydrazyl (DPPH), 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) and 2,4,6-Tripyridyl-s-Triazine (TPTZ) were purchased from Sigma (Germany) and poly lactic acid (PLA) from Zhejiang Hisun Biomaterials (China). The RAW264 macrophage cell line was purchased from National Cell Bank, Pasteur Institute of Iran, Iran and Dulbecco's Modified Eagle's Medium (DMEM), Fetal Bovine Serum (FBS), 1% Penicillin-Streptomycin from Gibco (Paisley, UK). All aqueous solutions were prepared using double distilled water. All reagents used were of analytical grade. Clinical strains of Pseudomonas aeruginosa 38 and Staphylococcus aureus 39 bacteria were isolated from hospitalized patients by our group, which have been characterized as antibiotic-resistant strains.Extract preparation. T.polium is a wild-growing...

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“…46 In the catalytic degradation by Convolvulus arvensis mediated silver nano, reaction was completed within 20 minutes and rate of the reaction is 0.108 min -1 . 47 The high catalyic efficiency of silver nanoparticles is due to the large number of active sites provided by high surface area of the very small nanoparticles. 47 The catalytic action of silver nanoparticle is attributed to the 'electron relay effect'.…”

Section: Degradation Of Methylene Bluementioning

confidence: 99%

“…47 The high catalyic efficiency of silver nanoparticles is due to the large number of active sites provided by high surface area of the very small nanoparticles. 47 The catalytic action of silver nanoparticle is attributed to the 'electron relay effect'. Reduction of dye by NaBH 4 without nano catalyst is not effective and required months for the degradation.…”

Section: Degradation Of Methylene Bluementioning

confidence: 99%

Treatment of Water Effluents Using Silver Nanoparticles

Mathew

Punnoose

2018

MSEIJ

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The water from industries with potential hazardous organic matters when discharged into the water bodies cause undesirable effects to the environment, aquatic life and human health. So it is necessary to treat waste water prior to their disposal. Degradation of organic pollutants is a major concern in the present scenario due to its stability, fastness to sunlight, resistance to degrading agents or microbial attack. It is mainly achieved by silver metal nanoparticles synthesised by green route. Degradation of dyes using metal nanoparticles is an environmental benign method. Silver metal nanoparticles show high catalytic potential due to its unique property of smaller structure and large surface to volume ratio. This review provides a detailed report of the degradation of various organic pollutants by phyto synthesised silver metal nanoparticles.

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Evaluation of the catalytic, antibacterial and anti-biofilm activities of the Convolvulus arvensis extract functionalized silver nanoparticles

Cited by 102 publications

References 52 publications

Green synthesis of silver nanoparticles using Thymbra spicata L. var. spicata (zahter) aqueous leaf extract and evaluation of their morphology-dependent antibacterial and cytotoxic activity

Green synthesis of silver nanoparticles using Thymbra spicata L. var. spicata (zahter) aqueous leaf extract and evaluation of their morphology-dependent antibacterial and cytotoxic activity

Facile preparation of a novel biogenic silver-loaded Nanofilm with intrinsic anti-bacterial and oxidant scavenging activities for wound healing

Treatment of Water Effluents Using Silver Nanoparticles

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