Extracellular biosynthesis of silver nanoparticles using the fungus Fusarium oxysporum

Ahmad, Absar; Mukherjee, Priyabrata; Senapati, Satyajyoti; Mandal, Deendayal; Khan, M. Islam; Kumar, Rajiv; Sastry, Murali

doi:10.1016/s0927-7765(02)00174-1

Cited by 1,702 publications

(930 citation statements)

References 27 publications

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“…Due to the excitation of plasma resonances or inter band transitions, some metallic nanoparticle dispersions exhibit the unique bands/peaks (Kuber and D'Souza 2006). A similar result was obtained by other researchers (Ahmad et al 2003;Kathiresan et al 2009). The results of the FTIR used to identify the possible bio molecules responsible for the stabilization of the (Asmathunisha et al 2010).…”

Section: Discussionsupporting

confidence: 92%

Biosynthesis of silver nanoparticles from mangrove plant (Avicennia marina) extract and their potential mosquito larvicidal property

2014

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To identify the larvicidal activities of silver nanoparticles synthesised with Avicennia marina leaf extract against the larvae of Aedes aegypti and Anopheleus stephensi, in vitro larvicidal activities such as LC 50 and LC 90 were assessed. Further, characterisation such as UV and FTIR analysis were carried out for the synthesised silver nanoparticles. The LC 50 value of the synthesised silver nanoparticles was identified as 4.374 and 7.406 mg/L for An. stephensi and Ae. aegypti larvae respectively. Further, the LC 90 values are also identified as 4.928 and 9.865 mg/L for An. stephensi and Ae. aegypti species respectively. The synthesised silver nanoparticles have maximum absorption at 420 nm with the average size of 60-95 nm. The FTIR data showed prominent peaks in

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Section: Discussionsupporting

confidence: 92%

Biosynthesis of silver nanoparticles from mangrove plant (Avicennia marina) extract and their potential mosquito larvicidal property

2014

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“…Other signals of C and Cu are from the carbon-coated copper grid. The TEM image in Figure 1D revealed that these AgNPs are located extracellularly, which is consistent with the finding of Ahmad et al 15 These combined results demonstrated that the live fungus F. oxysporum can extracellularly synthesize AgNPs.…”

Section: Environmental Science and Technology Letterssupporting

confidence: 90%

Superoxide-Mediated Extracellular Biosynthesis of Silver Nanoparticles by the Fungus Fusarium oxysporum

Yin

Xiao-ya

et al. 2016

Environ. Sci. Technol. Lett.

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The biosynthesis of silver nanoparticles (AgNPs) by microorganisms has become a hot topic in recent years, although its mechanism is still not well understood. Here we report the extracellular biosynthesis of AgNPs by the fungus Fusarium oxysporum through a superoxide-dependent mechanism. Reduction of Ag + to AgNPs in the extracellular region of F. oxysporum was verified by transmission electron microscopy, while the superoxide produced extracellularly by F. oxysporum was evidenced by chemiluminescence. We further demonstrated that the biosynthesis of AgNPs was inhibited by a superoxide scavenger or the inhibitor of NADH oxidases, and the addition of NADH significantly improved the formation of AgNPs. These results demonstrated that, for the first time, the fungus F. oxysporum can mediate the synthesis of AgNPs through the enzymatic generation of extracellular superoxide, which is helpful in understanding the biosynthesis of AgNPs and the biomineralization and transformation of silver and other metals or metalloids.

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“…Biological methods are regarded as safe, cost-effective, sustainable and environment friendly processes for the synthesis of nanoparticles [2]. Silver nanoparticles have been successfully synthesized using various bacteria [3][4][5], fungi [6,7] and plants [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Biosynthesized Silver Nanoparticles on Staphylococcus aureus Biofilm Quenching and Prevention of Biofilm Formation

et al. 2012

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Abstract:The development of green experimental processes for the synthesis of nanoparticles is a need in the field of nanotechnology. The synthesis of silver nanoparticles was achieved using Bacillus cereus supernatant and 1 mM silver nitrate. 100 mM glucose was found to quicken the rate of reaction of silver nanoparticles synthesis. UV-visible spectrophotometric analysis was carried out to assess the synthesis of silver nanoparticles. The synthesized silver nanoparticles were further characterized by using Nanoparticle Tracking Analyzer (NTA), Transmission Electron Microscope and Energy Dispersive X-ray spectra. These silver nanoparticles showed enhanced quorum quenching activity against Staphylococcus aureus biofilm and prevention of biofilm formation which can be seen under inverted microscope (40 X). The synergistic effect of silver nanoparticles along with antibiotics in biofilm quenching was found to be effective. In the near future, silver nanoparticles could be used in the treatment of infections caused by highly antibiotic resistant biofilm.

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Extracellular biosynthesis of silver nanoparticles using the fungus Fusarium oxysporum

Cited by 1,702 publications

References 27 publications

Biosynthesis of silver nanoparticles from mangrove plant (Avicennia marina) extract and their potential mosquito larvicidal property

Biosynthesis of silver nanoparticles from mangrove plant (Avicennia marina) extract and their potential mosquito larvicidal property

Superoxide-Mediated Extracellular Biosynthesis of Silver Nanoparticles by the Fungus Fusarium oxysporum

Effect of Biosynthesized Silver Nanoparticles on Staphylococcus aureus Biofilm Quenching and Prevention of Biofilm Formation

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