Biological synthesis of silver nanoparticles and evaluation of antibacterialand antifungal properties of silver and copper nanoparticles

Jafari, Azam; Pourakbar, Latifeh; Farhadi, Khalil; Gholizad, Lida Mohammad; Goosta, Yobert

doi:10.3906/biy-1406-81

Cited by 41 publications

(19 citation statements)

References 23 publications

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“…The obtained results are agreed with the findings of some previous studies. Jafari et al [45] in their research used AgNps with the size of 50 nm and observed inhibitory effect against Penicillium chrysogenum. They found that the particles have the toxicity effects on cytoplasma membrane.…”

Section: Effect Of Nanoparticle Concentrations On Mycelial Weight Andmentioning

confidence: 99%

Chitosan and Silver Nanoparticles as Control Agents of Some Faba Bean Spot Diseases

Ahmed¹

2017

J Plant Pathol Microbiol

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Faba bean (Vicia fabae L.) is one of the most economic legume crops in Egypt. The antifungal effects of different concentrations of Chitosan and silver nanoparticles (20 ppm, 40 ppm, 60 ppm, 80 ppm and 100 ppm) were studied against aggressive isolates of Botrytis fabae and Alternaria alternata causing chocolate spot disease and Alternaria leaf spot disease respectively. Under laboratory conditions, the application of five concentrations of Chitosan nanoparticles and silver nanoparticles to the cultures of B. fabae and A. alternata showed significant inhibition of mycelial growth. Number of spores/ml decreased with increasing of nanoparticle concentration. Mycelial weight of fungal pathogens also decreased. The lesion growth was suppressed by increasing in the concentration of nanoparticles with significantly different relative to control using detached leaf test. Under greenhouse conditions, chitosan and silver nanoparticles were sprayed in concentrations 60 ppm, 80 ppm, and 100 ppm on faba bean plants. The tested nanoparticles showed significant effect against B. fabae and A. alternata relative to control. The obtained results indicated that the highest reduction of chocolate spot severity was obtained with treatment by 100 ppm of silver nanoparticles (52.94%) followed by chitosan nanoparticles 80 ppm (50.59%). While the application of 100 ppm of chitosan nanoparticles was highly efficient against Alternaria leaf spot where the reduction in disease severity (67.13%) followed by 100 ppm silver nanoparticles which caused reduction rate (61.5%). The obtained results indicated the possibility of using chitosan and silver nanoparticles as a substance in the manufacturing of fungicides to minimize the impact of chocolate spot and Alternaria leaf spot diseases in faba bean. However, further experimental trials under field conditions and safety evaluation studies are needed before the nanoparticles types and concentrations can be used as potential antifungal agents.

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Section: Effect Of Nanoparticle Concentrations On Mycelial Weight Andmentioning

confidence: 99%

Chitosan and Silver Nanoparticles as Control Agents of Some Faba Bean Spot Diseases

Ahmed¹

2017

J Plant Pathol Microbiol

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“…Cá v t l u n no ó k t ướ tron k oản từ 1-100 nm đ n t u út s ú ý về n ữn đặ t n k á b t ủ ún v k ả năn ứn dụn uy n sâu tron n ều lĩn v k o n ư dượ p ẩm ó n n n p n n s n .. [4,5]. V áp dụn n n n no v o á n n n n n p v t p ẩm đượ đặt r lần đầu t n tron ươn trìn n độn ủ Bộ N n n p o ỳ v o 9/2003 [6] v đượ d đoán sẽ l n n t en t t o r t y đổ qu n tr n tron á n n n y. Tron n ữn năm đầu t n v áp dụn n n n no tron sản xuất n n n p ủ yếu đượ t n qu á n n ứu tron p òn t n m n ưn n y s u đó nó đã bắt đầu v đ n t ếp tụ ó ản ưởn đán kể tron á lĩn v qu n tr n n ư l t o á n ây trồn mớ p át tr ển v t l u ứ năn mớ v t n p ân p t n m n o ó ất n n n p n ư t u d t ỏ p ân bón v t u trừ sâu t n t n m n o ế b ến t p ẩm b o bì v á lĩn v k á n ư k ắ p ụ u quả ủ dư lượn ất d t ỏ v t u trừ sâu tron t v t v đất tron xử lý nướ t ả quản lý t n uy n t n n n v p át n sớm á mầm b n á ất ây n ễm tron ây trồn v t p ẩm,... [7].…”

Section: đặT Vấn đề unclassified

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Linh¹,

Thao²,

Hiếu³

et al. 2017

NST

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Penicillium digitatum is a major pathogen of post-harvest decay on orange fruits. In Vietnam, the control of P. digitatum is usually done mostly with use of chemicals which advertly affect on local environment and human health. Recently, nanomaterials show significant effectiveness in treating pathogenic fungi without harming the environment and human health. Therefore, nanomaterials are regarded as promising agents in plant protection and post-harvest processing. In this study, a fungus labeled as N11 causing green mould disease was isolated from decayed orange fruits of Tuyen Quang province and identified as Penicillium digitatum N11. The fungus was subjected to treatment with silver and copper nanoparticles and nano composites to evaluate the effectiveness of those materials on inhibition of fungal growth. Various concentrations of the nanoparticles were tested for different growth stages of the fungus. For silver and copper nanoparticles, the inhibition of fungal growth up to 50% was observed after 21 days of inoculation at the concentrations of 200-400 ppm and 250 ppm, respectively. At 500 ppm, copper nanoparticles completely inhibited the growth of P. digitatum N11. Nano composite Ag-silica (AgS) showed stronger inhibition of fungal growth than Ag-Bentonite (AgB) nano composite. In the treatment of fungal spores, inhibition of germination up to 90% for three days was observed at the concentrations of 1000 ppm for Cu, over 200 ppm for Ag nanoparticles, over 2000 ppm of AgS nano composite and 4000 ppm of AgB nano composite.

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“…Copper nanoparticles possess many intriguing properties which provide them many applications, such as antibacterial, antifungal, and antiviral applications [16][17][18]. A great deal of work can be found concerning the application of copper nanoparticles in electrochemistry [19,20] and electroanalysis [21].…”

Section: Introductionmentioning

confidence: 99%

Application of TiO2-Cu Composites in Photocatalytic Degradation Different Pollutants and Hydrogen Production

et al. 2020

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In the present work, copper nanoparticles were deposited onto the surface of two different commercial titanias (Evonik Aeroxide P25 and Aldrich anatase). During the synthesis, the concentration of copper was systematically varied (0.5%, 1.0%, 1.5%, 5.0%, and 10 wt.%) to optimize the composite-composition. The photocatalytic activity was evaluated under UV-light, using methyl orange and Rhodamine B as model and ketoprofen as real pollutant. For the hydrogen production capacity, oxalic acid was used as the sacrificial agent. The morpho-structural properties were investigated by using XRD (X-ray diffraction), TEM (Transmission Electron Microscopy) DRS (Diffuse Reflectance Spectroscopy), XPS (X-ray Photoelectron Spectroscopy), and SEM-EDX methods (Scanning Electron Microscopy-Energy Dispersive X-ray Analysis). Increasing the copper concentration enhanced the photocatalytic activity for methyl orange degradation in the case of Aldrich anatase-based composites. When the P25-based composites were considered, there was no correlation between the Cu concentration and the activity; but, independently of the base photocatalyst, the composites containing 10% Cu were the best performing materials. Contrarily, for the ketoprofen degradation, increasing the copper concentration deteriorated the photoactivity. For both Aldrich anatase and P25, the best photocatalytic activity was shown by the composites containing 0.5% Cu. For the degradation of Rhodamine B solution, 1.5% of copper nanoparticles was the most suitable. When the hydrogen production capacity was evaluated, the P25-based composites showed higher performance (produced more hydrogen) than the Aldrich anatase-based ones. It was found that Cu was present in four different forms, including belloite (Cu(OH)Cl), metallic Cu, and presumably amorphous Cu(I)- and Cu(II)-based compounds, which were easily convertible among themselves during the photocatalytic processes.

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Biological synthesis of silver nanoparticles and evaluation of antibacterialand antifungal properties of silver and copper nanoparticles

Cited by 41 publications

References 23 publications

Chitosan and Silver Nanoparticles as Control Agents of Some Faba Bean Spot Diseases

Chitosan and Silver Nanoparticles as Control Agents of Some Faba Bean Spot Diseases

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Application of TiO2-Cu Composites in Photocatalytic Degradation Different Pollutants and Hydrogen Production

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