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Journal ArticleDOI

Bio-fabrication of zinc oxide nanoparticles using leaf extract of Parthenium hysterophorus L. and its size-dependent antifungal activity against plant fungal pathogens.

TL;DR: Parthenium mediated zinc oxide nanoparticles were synthesized and proved to be good antifungal agents and environment friendly and explored the size-dependent antifundal activity against plant fungal pathogens.
About: This article is published in Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy.The article was published on 2013-08-01. It has received 400 citations till now. The article focuses on the topics: Zinc.
Citations
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Journal ArticleDOI
TL;DR: In this paper, a comprehensive review of the synthesis and characterization methods used for green synthesis of ZnO NPs using different biological sources is presented, including plants, fungus, bacteria, and algae.

669 citations

Journal ArticleDOI
TL;DR: Precision farming is measuring and responding to inter and intra-field variability in crops to form a decision support system for crop commodities.

665 citations

Journal ArticleDOI
Tamanna Bhuyan1, Kavita Mishra1, Manika Khanuja1, Ram Prasad1, Ajit Varma1 
TL;DR: In this article, the authors reported low-cost, green synthesis of zinc oxide (ZnO) nanoparticles using 25% (w/v) of Azadirachta indica (Neem) leaf extract.

484 citations

Journal ArticleDOI
TL;DR: It is concluded that nanotechnology offers a plethora of opportunities, by providing a novel and sustainable alternative in the food and agriculture sectors by providing the potential application of bio-synthesized and bio-inspired nanomaterial for sustainable development.

468 citations

Journal ArticleDOI
TL;DR: This study determines the antimicrobial efficacy of the synthesized ZnO nanoparticles against clinical and standard strains of S. aureus and P. aeruginosa and standard strain of E. coli.

466 citations


Cites background from "Bio-fabrication of zinc oxide nanop..."

  • ...Purpurascens, Parthenium hysterophorus L. (Rajiv et al., 2013), Citrus aurantifolia extract (Samat and Nor, 2013), Plectranthus amboinicus (Vijayakumar et al., 2015)....

    [...]

References
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Journal ArticleDOI
TL;DR: Recommendations of the National Committee for Clinical Laboratory Standards continue to be based on this publication; the “Kirby-Bauer” method is, among the many disk methods used in other countries, still the one that has been researched most thoroughly and updated continuously.
Abstract: In the words of the authors, the paper by A. W. Bauer et al., from the University of Washington in Seattle, on a standardized single-disk method for antibiotic susceptibility testing “. . . consolidate(s) and update(s) previous descriptions of the method and provide(s) a concise outline for its performance and interpretation.” Clinical microbiologists were relieved that finally a disk diffusion method had been standardized, could be used with ease, and provided reliable results as compared with minimum inhibitory concentration tests. The pivotal role of Hans Ericsson’s theoretical and practical studies (H. Ericsson and G. Svartz-Malmberg, Antibiot. Chemother. 6:41–74, 1959), as well as earlier reports by some of the authors of the publications cited, must be mentioned as a matter of fairness. Most of the recommendations given are still valid today even though some of the antimicrobial agents are obsolete, new ones have been added, some zone sizes had to be modified, and new media were designed for Haemophilus influenzae and Neisseria gonorrhoeae. Recommendations of the National Committee for Clinical Laboratory Standards continue to be based on this publication; the “Kirby-Bauer” method is, among the many disk methods used in other countries, still the one that has been researched most thoroughly and updated continuously. ALEXANDER VON GRAEVENITZ

16,916 citations

Journal ArticleDOI
TL;DR: This review presents an overview of silver nanoparticles (Ag NPs) preparation by green synthesis approaches that have advantages over conventional methods involving chemical agents associated with environmental toxicity.

3,290 citations

Journal ArticleDOI
TL;DR: The rates of reduction of the metal ions by Neem leaf extract are much faster than those observed by us in earlier studies using microorganisms such as fungi, highlighting the possibility that nanoparticle biological synthesis methodologies will achieve rates of synthesis comparable to those of chemical methods.

2,339 citations

Journal ArticleDOI
TL;DR: In this article, a sundried biomass of Cinnamomum camphora leaf with aqueous silver or gold precursors at ambient temperature was used for simple synthesis of nanoparticles.
Abstract: The synthesis of nanocrystals is in the limelight in modern nanotechnology. Biosynthesis of nanoparticles by plant extracts is currently under exploitation. Not only could silver nanoparticles ranging from 55 to 80 nm in size be fabricated, but also triangular or spherical shaped gold nanoparticles could be easily modulated by reacting the novel sundried biomass of Cinnamomum camphora leaf with aqueous silver or gold precursors at ambient temperature. The marked difference of shape control between gold and silver nanoparticles was attributed to the comparative advantage of protective biomolecules and reductive biomolecules. The polyol components and the water-soluble heterocyclic components were mainly responsible for the reduction of silver ions or chloroaurate ions and the stabilization of the nanoparticles, respectively. The sundried leaf in this work was very suitable for simple synthesis of nanoparticles.

1,614 citations

Journal ArticleDOI
TL;DR: The discovery that the extract from the lemongrass plant, when reacted with aqueous chloroaurate ions, yields a high percentage of thin, flat, single-crystalline gold nanotriangles, which seem to grow by a process involving rapid reduction, assembly and room-temperature sintering of 'liquid-like' spherical gold nanoparticles.
Abstract: The optoelectronic and physicochemical properties of nanoscale matter are a strong function of particle size. Nanoparticle shape also contributes significantly to modulating their electronic properties. Several shapes ranging from rods to wires to plates to teardrop structures may be obtained by chemical methods; triangular nanoparticles have been synthesized by using a seeded growth process. Here, we report the discovery that the extract from the lemongrass plant, when reacted with aqueous chloroaurate ions, yields a high percentage of thin, flat, single-crystalline gold nanotriangles. The nanotriangles seem to grow by a process involving rapid reduction, assembly and room-temperature sintering of 'liquid-like' spherical gold nanoparticles. The anisotropy in nanoparticle shape results in large near-infrared absorption by the particles, and highly anisotropic electron transport in films of the nanotriangles.

1,473 citations