Biosynthesis of gold nanoparticles by Pseudomonas veronii AS41G inhabiting Annona squamosa L.

Baker, Syed; Satish, S.

doi:10.1016/j.saa.2015.05.080

Cited by 76 publications

(23 citation statements)

References 15 publications

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“…Absorbance at 600 nm was subsequently measured to quantify bacterial growth. Positive and negative controls were maintained to distinguish the activity of the gold nanoparticles based on the optical density (OD) of the controls compared with the test pathogens treated with gold nanoparticles [ 14 ].…”

Section: Methodsmentioning

confidence: 99%

Endogenic mediated synthesis of gold nanoparticles bearing bactericidal activity

Baker

Prasad²,

Sardana

2016

J Microsc Ultrastruct

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The present investigation aimed to synthesize gold nanoparticles using Pseudomonas fluorescens 417 inhabiting Coffea arabica L. Biologically synthesized gold nanoparticles were polydispersed in nature and characterized using hyphenated techniques such as UV-visible spectrophotometry, which ascertained characteristic peaks between 450 nm and 650 nm. Fourier transform infrared analysis predicted the functional groups present in the cell-free supernatant that mediated the synthesis and stabilization of gold nanoparticles. The crystalline nature of the gold nanoparticles was analyzed with X-ray diffraction techniques that displayed the Bragg's diffraction intensity. Transmission electron microscopy revealed the size of nanoparticles ranging from 5 nm to 50 nm, with most of them bearing a spherical shape. The study also revealed the bactericidal activity of synthesized nanoparticles against a panel of clinically significant pathogens. Maximum activity was observed against Pseudomonas aeroginosa followed by Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Klebsiella pneumoniae. The results obtained in the present investigation are promising for ecofriendly approaches for synthesis of gold nanoparticles bearing bactericidal activity that can act as an alternative to combat drug-resistant pathogens.

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Section: Methodsmentioning

confidence: 99%

Endogenic mediated synthesis of gold nanoparticles bearing bactericidal activity

Baker

Prasad²,

Sardana

2016

J Microsc Ultrastruct

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“…In ancient times, gold was used to treat fever and syphilis and it was in the early nineteenth century, Robert Koch developed gold cyanide against Bacillus species which led to progress in treating tuberculosis in the twentieth century [46]. In recent decades, gold nanoparticles owing to their unique properties have traded their applications in diverse fields [47]. Some of the prime properties of gold nanoparticles include high electric conductivity, improved surface catalytic activity, high heat conductivity and enhanced photoemission properties [48].…”

Section: Gold Nanoparticles As Nanobactericidesmentioning

confidence: 99%

“…Some of the prime properties of gold nanoparticles include high electric conductivity, improved surface catalytic activity, high heat conductivity and enhanced photoemission properties [48]. Interestingly, gold nanoparticles are regarded as one of the stable metallic nanoparticles and their easy surface functionalization has led to their potential applications in the biomedical sector for instance in diagnosis, drug delivery and potent antimicrobial agents [47].…”

Section: Gold Nanoparticles As Nanobactericidesmentioning

confidence: 99%

Bio-nanobactericides: an emanating class of nanoparticles towards combating multi-drug resistant pathogens

Baker

Перьянова

2019

SN Appl. Sci.

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The recent research on nanomaterials as antibacterials agents have gained significant importance in recent decades. The sustainable development of bio-nanobactericides from biogenic sources have resulted as one of the potent bactericidal agents at nanoscale. Bio-nanobactericides generously offers low toxic profiles in comparison with nanomaterials synthesized from conventional routes. The biological components mediate the synthesis and act as stabilizing agent to participate in the desired activity. These nanobactericides offers efficient alternatives to combat drug resistant pathogens with their unique mode of actions. Owing to their size dependent properties, they can be one of the most attractive tools against both gram +ve and gram −ve pathogens which are resistant to most of the available antibiotics. Based on these keys fundamental facts and considerations, the present mini review is designed to compile the recently published studies on nanomaterials bearing antibacterial activity against clinically important test pathogens.

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“…The use of endophytes for the synthesis of nanomaterials has been reported in the literature [4]. The integration of nanomaterials from biological origin in nanoengineered devices has also gained significant research interest.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired ZnS:Gd Nanoparticles Synthesized from an Endophytic Fungi Aspergillus flavus for Fluorescence-Based Metal Detection

et al. 2019

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Recently, several nonconventional sources have emerged as strong hotspots for the biosynthesis of chalcogenide quantum dots. However, studies that have ascertained the biomimetic methodologies that initiate biosynthesis are rather limited. The present investigation portrays a few perspectives of rare-earth(Gd)-doped ZnS biosynthesis using the endophytic fungi Aspergillus flavus for sensing metals based on their fluorescence. Analysis of ZnS:Gd nanoparticles was performed by elemental analysis, energy-dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), photoluminescence (PL), and transmission electron microscopy (TEM). The results of TEM demonstrated that the particles were polycrystalline in nature, with a mean size of 10–18 nm. The fluorescence amenability of the biogenic ZnS nanoparticles was further used for the development of a simple and efficient sensing array. The results showed sensitive and detectable quenching/enhancement in the fluorescence of biogenic colloidal ZnS nanoparticles, in the presence of Pb (II), Cd (II), Hg (II), Cu (II) and Ni (II), respectively. The fluorescence intensity of the biogenic ZnS:Gd nanoparticles was found to increase compared to that of the ZnS nanoparticles that capacitate these systems as a reliable fluorescence sensing platform with selective environmental applications.

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Biosynthesis of gold nanoparticles by Pseudomonas veronii AS41G inhabiting Annona squamosa L.

Cited by 76 publications

References 15 publications

Endogenic mediated synthesis of gold nanoparticles bearing bactericidal activity

Endogenic mediated synthesis of gold nanoparticles bearing bactericidal activity

Bio-nanobactericides: an emanating class of nanoparticles towards combating multi-drug resistant pathogens

Bioinspired ZnS:Gd Nanoparticles Synthesized from an Endophytic Fungi Aspergillus flavus for Fluorescence-Based Metal Detection

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