Biological synthesis of silver nanoparticles using the fungus Aspergillus flavus

Vigneshwaran, N.; Ashtaputre, Nandita; Varadarajan, P. V.; Nachane, R. P.; Paralikar, K. M.; Balasubramanya, R. H.

doi:10.1016/j.matlet.2006.07.042

Cited by 843 publications

(411 citation statements)

References 26 publications

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“…These functional groups are the major classes in many of the chemical groups, which have been previously proven to have potential as reducing agents in the synthesis of silver nanoparticles (Cho et al, 2005). Studies indicate that the carboxyl (-C=O), hydroxyl (-OH) and amine (-NH) groups in leaf extracts are the ones mainly involved in the fabrication of silver nanoparticles, and for which bands were reported (Vigneshwaran et al, 2007).…”

Section: Resultsmentioning

confidence: 99%

Larvicidal and pupicidal activity of synthesized silver nanoparticles using Leucas aspera leaf extract against mosquito vectors, Aedes aegypti and Anopheles stephensi

Sivapriyajothi

Kumar

Kovendan

et al. 2014

J Entomol Acarol Res

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Mosquitoes are one of the most medically significant groups of vectors, having an ability to transmit parasites and pathogens that can have devastating impacts on humans. The development of reliable and ecofriendly processes for the synthesis of metallic nanoparticles is an important step in the field of application of nanotechnology. In this study, we address the biosynthesis of silver nanoparticles (AgNPs) using Leucas aspera leaf extract, and evaluate its lethal concentration (LC50 and LC90) values against first to fourth instar larvae and pupae of the mosquito vectors, Aedes aegypti and Anopheles stephensi. The nanoparticles were characterized by UV-Vis spectrum, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Fourier-transformed infrared spectroscopy analysis. Larvae and pupae were exposed to varying concentrations of aqueous extracts of synthesized AgNPs for 24 h. The maximum mortality was observed from synthesized AgNPs, with LC50 values for I-IV instars and pupae ranging from 13.06 to 25. 912.94. The study suggests that nanoparticles could be a preferred alternative to the most hazardous existing chemical pesticides, contributing to a more healthy environment by providing an ideal ecological and user-friendly vector control strategy for managing malaria and dengue, and contributing to their eventual elimination in the near future.

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Section: Resultsmentioning

confidence: 99%

Larvicidal and pupicidal activity of synthesized silver nanoparticles using Leucas aspera leaf extract against mosquito vectors, Aedes aegypti and Anopheles stephensi

Sivapriyajothi

Kumar

Kovendan

et al. 2014

J Entomol Acarol Res

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“…As mentioned in method section, the silver nanoparticles were repeatedly centrifuged and redispersed in sterile distilled water prior to XRD and TEM analysis, ruling out possibility the presence of any free compound/protein that might independently crystallize and give rise to Braggs reflections. The intense background noise is due to the protein shell around the nanoparticles [24]. An unidentified peak at 46º …”

Section: Xrd Studiesmentioning

confidence: 99%

Extracellular synthesis of silver nanoparticles using dried leaves of pongamia pinnata (L) pierre

et al. 2010

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Extract of oven dried leaves of Pongamia pinnata (L) Pierre was used for the synthesis of silver nanoparticles. Stable and crystalline silver nanoparticles were formed by the treatment of aqueous solution of AgNO 3 (1mM) with dried leaf extract of Pongamia pinnata (L) Pierre. UV-visible spectroscopy studies were carried out to quantify the formation of silver nanoparticles. Transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy were used to characterize the silver nanoparticles. TEM image divulges that silver nanoparticles are quite polydispersed, the size ranging from 20 nm to 50 nm with an average of 38 nm. Water soluble heterocyclic compounds such as flavones were mainly responsible for the reduction and stabilization of the nanoparticles. Silver nanoparticles were effective against Escherichia coli (ATCC 8739), Staphylococcus aureus (ATCC 6538p), Pseudomonas aeruginosa (ATCC 9027) and Klebsiella pneumoniae (clinical isolate). The move towards extracellular synthesis using dried biomass appears to be cost effective, eco-friendly to the conventional methods of nanoparticles synthesis.

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“…Biological methods of nanoparticle synthesis using microorganisms [15][16][17] , enzymes [18] , fungus [19] , and plants or plant extracts [20][21][22][23][24] have been suggested as possible ecofriendly alternatives to chemical and physical methods. Sometimes the synthesis of nanoparticles using plants or parts of plants can prove advantageous over other biological processes by eliminating the elaborate processes of maintaining microbial cultures [20] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of silver nanoparticles using leaves of Catharanthus roseus Linn. G. Don and their antiplasmodial activities

Sekar

Panneerselvam

Murugan

et al. 2012

Asian Pacific Journal of Tropical Biomedicine

395

159

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Biological synthesis of silver nanoparticles using the fungus Aspergillus flavus

Cited by 843 publications

References 26 publications

Larvicidal and pupicidal activity of synthesized silver nanoparticles using Leucas aspera leaf extract against mosquito vectors, Aedes aegypti and Anopheles stephensi

Larvicidal and pupicidal activity of synthesized silver nanoparticles using Leucas aspera leaf extract against mosquito vectors, Aedes aegypti and Anopheles stephensi

Extracellular synthesis of silver nanoparticles using dried leaves of pongamia pinnata (L) pierre

Synthesis of silver nanoparticles using leaves of Catharanthus roseus Linn. G. Don and their antiplasmodial activities

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