Biogenic Synthesis of Silver Nanoparticles Using <i>Scenedesmus abundans</i> and Evaluation of Their Antibacterial Activity

Aziz, Nafe; Fatma, Tasneem; Varma, Ajit; Prasad, Ram

doi:10.1155/2014/689419

Cited by 145 publications

(30 citation statements)

References 31 publications

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“…It also seems probable that glucose and ascorbate can reduce silver and gold ions to form nanoparticles at elevated temperatures [ 56 , 57 ]. Proteins, enzymes, phenolics, and other chemical compounds within plant leaf extracts can reduce silver salts and provide exquisite tenacity toward the agglomeration of the formed nanoparticles [ 27 , 58 , 59 ]. In Neem leaf extract, terpenoids, polyphenols, sugars, alkaloids, phenolic acids, and proteins play crucial roles in the bio-reduction of metal ions, yielding nanoparticles [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Gold Nanoparticles Using Leaf Extract of Ziziphus zizyphus and their Antimicrobial Activity

et al. 2018

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(1) Background: There is a growing need for the development of new methods for the synthesis of nanoparticles. The interest in such particles has raised concerns about the environmental safety of their production methods; (2) Objectives: The current methods of nanoparticle production are often expensive and employ chemicals that are potentially harmful to the environment, which calls for the development of “greener” protocols. Herein we describe the synthesis of gold nanoparticles (AuNPs) using plant extracts, which offers an alternative, efficient, inexpensive, and environmentally friendly method to produce well-defined geometries of nanoparticles; (3) Methods: The phytochemicals present in the aqueous leaf extract acted as an effective reducing agent. The generated AuNPs were characterized by Transmission electron microscopy (TEM), Scanning electron microscope (SEM), and Atomic Force microscopy (AFM), X-ray diffraction (XRD), UV-visible spectroscopy, energy dispersive X-ray (EDX), and thermogravimetric analyses (TGA); (4) Results and Conclusions: The prepared nanoparticles were found to be biocompatible and exhibited no antimicrobial or antifungal effect, deeming the particles safe for various applications in nanomedicine. TGA analysis revealed that biomolecules, which were present in the plant extract, capped the nanoparticles and acted as stabilizing agents.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Gold Nanoparticles Using Leaf Extract of Ziziphus zizyphus and their Antimicrobial Activity

et al. 2018

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“…In the United States alone, roughly 1.7 million estimated nosocomial infections, primarily from bacteria and fungi, are responsible for 99,000 deaths each year (Klevens et al, 2007). Owing to this increased resistance of several pathogenic bacteria against antibiotics, considerable attention has been focused on developing new treatment modalities featuring alternative antibacterial agents (Aziz et al, 2014; Manikprabhu and Lingappa, 2014; Teillant et al, 2015). In this milieu, metallic silver, especially in the form of nanoparticle and nanostructured substrates, has received considerable traction for antibacterial activity due to its unique physiochemical properties (Husain et al, 2015; Prasad et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Leveraging the Attributes of Mucor hiemalis-Derived Silver Nanoparticles for a Synergistic Broad-Spectrum Antimicrobial Platform

et al. 2016

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Driven by the need to engineer robust surface coatings for medical devices to prevent infection and sepsis, incorporation of nanoparticles has surfaced as a promising avenue to enhance non-fouling efficacy. Microbial synthesis of such nanoscale metallic structures is of substantive interest as this can offer an eco-friendly, cost-effective, and sustainable route for further development. Here we present a Mucor hiemalis-derived fungal route for synthesis of silver nanoparticles, which display significant antimicrobial properties when tested against six pathological bacterial strains (Klebsiella pneumoniae, Pseudomonas brassicacearum, Aeromonas hydrophila, Escherichia coli, Bacillus cereus, and Staphylococcus aureus) and three pathological fungal strains (Candida albicans, Fusarium oxysporum, and Aspergillus flavus). These antimicrobial attributes were comparable to those of established antibiotics (streptomycin, tetracycline, kanamycin, and rifampicin) and fungicides (amphotericin B, fluconazole, and ketoconazole), respectively. Importantly, these nanoparticles show significant synergistic characteristics when combined with the antibiotics and fungicides to offer substantially greater resistance to microbial growth. The blend of antibacterial and antifungal properties, coupled with their intrinsic “green” and facile synthesis, makes these biogenic nanoparticles particularly attractive for future applications in nanomedicine ranging from topical ointments and bandages for wound healing to coated stents.

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“…6). The previous result corresponds to the synthesis of silver sub-micro and nanoparticles of p-tert-butyl thiacalix [23] arenes and amla extract for antiproliferative property, which showed an average particle size distribution with ~188 nm [39,40].…”

Section: Psamentioning

confidence: 86%

“…This experiment was repeated for three times. The data generated were expressed as a mean±SD [23][24][25].…”

Section: Antibacterial Activitymentioning

confidence: 99%

Silver Nanoparticles From Trianthema Portulacastrum: Green Synthesis, Characterization, Antibacterial and Anticancer Properties

Krishnan¹,

Pradhan²,

Masilamani³

et al. 2017

Asian J Pharm Clin Res

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Objective: In this study, silver nanoparticles (SNPs) were synthesized using an aqueous extract of Trainthema portulacastrum and silver ions (Ag+) which have been proven against certain pathogenic bacterial strains and hepatocellular carcinoma (HepG2) cell line. Methods:The bio fabricated nanoparticles were confirmed by surface plasmon resonance which were characterized by biophysical measures utilizing the ultraviolet-visible spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray, and transmission electron microscope (TEM), Fourier transform infrared spectroscopy, particle size analyzer, and X-ray diffraction. Antibacterial efficacy against Enterobacter aerogens, Proteus mirabilis, Escherichia coli, Staphylococcus epidermis, and Bacillus subtilis. The effect of SNPs tested against HepG2 and NIH/3T3 cell line exhibits a dose-dependent toxicity. Results and Conclusion:The SEM and TEM images confirmed the presence of spherical and hexagonal shape (0.3-4 µm) of nanocrystalline particles with the size range of 11.5-29.2 nm. The average particles size of SNPs is 190.3±17.0 nm. Antibacterial activity was carried out by agar well diffusion method against different pathogenic bacteria of which B. subtilis showed a significant zone of inhibition 8.66 mm and 12.0 mm for aqueous plant extract and synthesized SNPs. The effect of SNPs tested against HepG2 and NIH/3T3 cell line exhibits a dose-dependent toxicity. In case of HepG2, the cell viability was decreased to 50% (IC 50 ) at the concentration of 173.8±0.84 µg/mL. From the results, it can be concluded that the SNPs fabricated using green synthesis method will be a promising candidate in the biomedical field, due to its high bioactive properties.

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Biogenic Synthesis of Silver Nanoparticles Using Scenedesmus abundans and Evaluation of Their Antibacterial Activity

Cited by 145 publications

References 31 publications

Synthesis of Gold Nanoparticles Using Leaf Extract of Ziziphus zizyphus and their Antimicrobial Activity

Synthesis of Gold Nanoparticles Using Leaf Extract of Ziziphus zizyphus and their Antimicrobial Activity

Leveraging the Attributes of Mucor hiemalis-Derived Silver Nanoparticles for a Synergistic Broad-Spectrum Antimicrobial Platform

Silver Nanoparticles From Trianthema Portulacastrum: Green Synthesis, Characterization, Antibacterial and Anticancer Properties

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