Extracellular biosynthesis of silver nanoparticles by the culture supernatant of Bacillus licheniformis

Kalishwaralal, Kalimuthu; Deepak, Venkataraman; Ramkumarpandian, Sureshbabu; Nellaiah, H.; Gurunathan, Sangiliyandi

doi:10.1016/j.matlet.2008.06.051

Cited by 427 publications

(183 citation statements)

References 11 publications

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“…There are numerous reports regarding extracellular synthesis of the AgNPs by Bacillus species generated with the different sizes (31,32,36,37). Also, in 2008 two studies have been reported on the synthesis of AgNPs using Bacillus licheniformis by Kalishwaralal et al (13,19). age particle size around 40 and 50 nm.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, biological method of synthesis could be introduced as an alternative method for elimination of such problems (10)(11)(12). Until now, the AgNPs were synthesized by bacteria (13), plants (14), fungi (15), Algae (16), and yeasts (17). Inorganic nanoparticles can be generated using micro-organisms through either extracellular or intracellular activities (18).…”

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confidence: 99%

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Green Extracellular Synthesis of the Silver Nanoparticles Using Thermophilic Bacillus Sp. AZ1 and its Antimicrobial Activity Against Several Human Pathogenetic Bacteria

Deljou

Goudarzi

2016

Iran J Biotechnol

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Green Extracellular Synthesis of the Silver Nanoparticles Using Thermophilic Bacillus Sp. AZ1 and its Antimicrobial Activity Against Several Human Pathogenetic Bacteria

Deljou

Goudarzi

2016

Iran J Biotechnol

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“…Two enzymes, NADPH-dependant reductase [48] and nitroreductase NfsA [49], have been proven involved in the reduction of Ag + to Ag 0 . Reducing sugars are thought to be responsible for the non enzymatic reduction; these are more likely to be found in plant extracts [48].…”

Section: Discussionmentioning

confidence: 99%

Biogenic synthesis of antimicrobial silver nanoparticles capped with l-cysteine

Perni

Hakala

Prokopovich

2014

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The number of medical applications of silver nanoparticles is constantly expanding due to their high bactericidal properties coupled with low toxicity towards mammalian cells. Because of this expanding use of silver nanoparticles, novel methods of synthesis have been developed in order to achieve nanoparticles preparation through inexpensive and environmentally friendly processes; biogenic synthesis of silver nanoparticles is an approach that meets those requirements.In this work, E. coli cultures centrigugates were used to synthesis L-cysteine capped silver nanoparticles. The ratio between AgNO 3 and L-cysteine has been proven to affect the size of the nanoparticles: higher amount of L-cysteine returns smaller nanoparticles, but does not affect the percentage of organic matter in the nanoparticles as determined through TGA.The silver nanoparticles prepared had antimicrobial activity against E. coli and S. aureus with Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) independent of the nanoparticles size; for both bacterial species the values of MIC and MBC were the same, 0.0432 mg/ml for E. coli and 0.0216 mg/ml for S. aureus.

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“…In addition, AgNPs can be prepared by chemical reduction, such as microemulsion techniques [19], UV-initiated photo reduction [20], photo induced reduction [21], electrochemical synthetic methods [22], irradiation methods [23] and microwave-assisted synthesis [24]. In a biosynthesis method, AgNPs have been synthesized using bacteria [25], fungi [26], algae [27] and plants [28] [29].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Silver Nanoparticles and Their Use in Catalytic Reduction of 4-Nitrophenol

Al-Marhaby¹,

Seoudi²

2016

WJNSE

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Silver nanoparticles of various sizes were prepared at room temperature using silver nitrate as a precursor, various molar ratios of sodium citrate as a surfactant stabilizing material and sodium borohydride as a reducing agent. The morphology, distribution and sphericity of the particles were assessed in images from a transmission electron microscope (TEM). The sizes of the particles were calculated as being 9, 11 and 14 nm. The effects of the particles' sizes on the plasmon bands were confirmed by ultraviolet-visible spectra measurements. The prepared samples were applied in photo catalysis of 4-Nitrophenol (4-NP), and the rate constant was determined as 0.05 s −1 , 0.0015 s −1 and 0.00021 s −1 for particles of 9 nm, 11 nm and 14 nm, respectively. Due to their high surface energy, the smaller particle sizes were more active in the photo catalytic application.

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Extracellular biosynthesis of silver nanoparticles by the culture supernatant of Bacillus licheniformis

Cited by 427 publications

References 11 publications

Green Extracellular Synthesis of the Silver Nanoparticles Using Thermophilic Bacillus Sp. AZ1 and its Antimicrobial Activity Against Several Human Pathogenetic Bacteria

Green Extracellular Synthesis of the Silver Nanoparticles Using Thermophilic Bacillus Sp. AZ1 and its Antimicrobial Activity Against Several Human Pathogenetic Bacteria

Biogenic synthesis of antimicrobial silver nanoparticles capped with l-cysteine

Preparation and Characterization of Silver Nanoparticles and Their Use in Catalytic Reduction of 4-Nitrophenol

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