Green synthesis of gold nanoparticles from leaf extract of Terminalia arjuna, for the enhanced mitotic cell division and pollen germination activity

Gopinath, Kasi; Venkatesh, K. S.; Ilangovan, R.; Sankaranarayanan, K.; Arumugam, A.

doi:10.1016/j.indcrop.2013.08.060

Cited by 118 publications

(41 citation statements)

References 41 publications

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“…Metal nanoparticles and their alloys such as silver, iron, cadmium, zinc, platinum, gold and graphene have diverse applications in different aspects of human endeavours, such as catalytic activity [9,22,23], optical [24], electronic [25], magnetic, antimicrobial [3,7,10,13,26] and biomedical usefulness [27,28]. AgNPs, for instance, are of interest because of their unique properties (size-and shape-dependent optical, electrical and magnetic properties) which can be incorporated into coating materials, antimicrobial applications, biosensor materials, composite fibres and electronic components [29].…”

Section: Introductionmentioning

confidence: 99%

Cola nitida-Mediated Biogenic Synthesis of Silver Nanoparticles Using Seed and Seed Shell Extracts and Evaluation of Antibacterial Activities

et al. 2015

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In this study, seed and seed shell extracts of Cola nitida were investigated for the biogenic synthesis of silver nanoparticles (AgNPs) under ambient condition. The biosynthesized AgNPs were characterized through visual development of colour, UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The antibacterial activities of the AgNPs were determined using some multidrug-resistant clinical isolates. The biosynthesized AgNPs depicted brown and yellowish orange colour using seed and seed extract, respectively, with maximum absorbance readings at 457.5 and 454.5 nm. The FTIR spectrum showed strong peaks at 3292.49, 2086.98 and 1631.78 cm −1 for seed extract-mediated AgNPs, while peaks of 3302.13, 2086.05 and 1633.71 cm −1 were obtained for seed shell extract-mediated AgNPs, all indicating that proteins were the capping and stabilization molecules in the biogenic synthesis of AgNPs. The AgNPs were spherical in shape with sizes ranging from 8 to 50 and 5 to 40 nm for seed and seed shell-mediated AgNPs, respectively. The energydispersive X-ray (EDX) analysis showed the presence of silver as a prominent metal, while the selected area electron diffraction (SAED) pattern conformed to the face-centred cubic phase and crystalline nature of AgNPs. At various concentrations ranging from 50-150 μg/ml, the AgNPs inhibited growth of multidrug-resistant strains of Klebsiella granulomatis, Pseudomonas aeruginosa and Escherichia coli to the tune of 10-32 mm. Comparatively, seed shell extractmediated AgNPs had better activities with minimum inhibitory concentration (MIC) of 50 μg/ml against all the tested isolates, while the MICs of seed extract-mediated AgNPs were obtained as 50, 80 and 120 μg/ml against E. coli, P. aeruginosa (wound) and P. aeruginosa (burn), respectively. This study has demonstrated the feasibility of eco-friendly biogenic synthesis of AgNPs using seed and seed shell extracts of C. nitida, and the report to the best of our knowledge is the first reference to extracts of C. nitida for the green synthesis of AgNPs.

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Section: Introductionmentioning

confidence: 99%

Cola nitida-Mediated Biogenic Synthesis of Silver Nanoparticles Using Seed and Seed Shell Extracts and Evaluation of Antibacterial Activities

et al. 2015

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“…Rietveld XRD was designed to refine simultaneously crystallite size of the samples ant the obtained values of crystallite size are given in Table 1. [32]. Also, two main broad metal-oxygen (M-O) bands are seen in the FT-IR spectra of all spinel, and ferrites in particular [3].…”

Section: Structural Analysismentioning

confidence: 94%

Hibiscus rosa-sinensis Leaf Extracted Green Methods, Magneto-Optical and Catalytic Properties of Spinel CuFe2O4 Nano- and Microstructures

Manikandan

Durka²,

Antony

2015

J Inorg Organomet Polym

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Spinel CuFe 2 O 4 nano-and microstructures were synthesized by a simple, economical and eco-friendly microwave heating (MHM) and modified sol-gel methods (SGM) using metal nitrates and Hibiscus rosa-sinensis leaf extracted solution, instead of toxic inorganic/organic catalyst, template and surfactant. Powder XRD, FT-IR, EDX and SAED results were confirmed that the as-synthesized products have a single-phase spinel structure with high crystallinity and without the presence of any other secondary phase impurities. The morphology of the samples was revealed by HR-SEM and HR-TEM techniques show that the MHM and SGM products consist of nano-and microstructures, respectively, and their possible formation mechanisms were also proposed. The optical band gap (E g ) was measured using Kubelka-Munk model and it shows higher value (2.35 eV) for CuFe 2 O 4 -MHM than CuFe 2 O 4 -SGM (2.18 eV), due to the smaller particle size of CuFe 2 O 4 -MHM. The magnetic property of the samples showed a ferromagnetic behavior and the magnetization (M s ) value of CuFe 2 O 4 -MHM is higher i.e. 61.13 emu/g than CuFe 2 O 4 -SGM (57.25 emu/g). Both the samples were successfully tested as catalysts for the conversion of benzylic alcohols to respective carbonyls using H 2 O 2 (as oxidant) and acetonitrile (as a solvent) catalytic system. It was found that the CuFe 2 O 4 -MHM catalyst show best performance of conversion of aromatic alcohols into aldehydes than that of CuFe 2 O 4 -SGM. Spinel CuFe 2 O 4 catalyst is magnetically recyclable and could be reused with no significant loss in catalytic activity as proved for five consecutive cycles.

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“…On the other hand, the gram positive S. aureus bacteria have a very thick cell wall membrane, its thickness ranged from 12 nm and made up of large number of mucopeptides, lipoteichoic and acids murein [7]. In addition, S. aureus has an antioxidant enzyme and shows a strong oxidant resistance [8,9].…”

Section: B Ftir Studiesmentioning

confidence: 99%

Bio Mediated Synthesis of Silver Nanoparticles using Moringa Oleifera Bark Extract and its Antimicrobial Activity against Human Pathogens

Varthini¹

2018

IJRASET

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There is an increasing commercial demand for nanoparticles due to their wide applicability areas such as electronics, chemistry, catalysis, energy and medicine. Metallic nanoparticles are traditionally synthesized by wet -chemical techniques, where the chemicals used are quit toxic and inflammable. In the present report, bio-reduction of silver nitrate into silver nanoparticles using the plant of Moringa oleifera barks is reported. The synthesized silver nanoparticles are characterized by XRD, FTIR, UV-visible and antimicrobial activity analysis. From the XRD analysis it is found that the synthesized silver nanoparticles were the Face Centered Cubic structure and the crystalline size of the sample is 22.08 nm. FTIR data proved that the components in Moringa oleifera barks act as good reductants and stabilizers for the silver nanoparticles. The absorption in the visible region and broad peak at 480 nm was studied by UV studies. The antimicrobial activity of bio-synthesized silver nanoparticles was analyzed against E.coli and Staphylococcus bacteria. The results revealed that the bark extract is a very good bio reductant for the synthesis of silver nanoparticles.

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Green synthesis of gold nanoparticles from leaf extract of Terminalia arjuna, for the enhanced mitotic cell division and pollen germination activity

Cited by 118 publications

References 41 publications

Cola nitida-Mediated Biogenic Synthesis of Silver Nanoparticles Using Seed and Seed Shell Extracts and Evaluation of Antibacterial Activities

Cola nitida-Mediated Biogenic Synthesis of Silver Nanoparticles Using Seed and Seed Shell Extracts and Evaluation of Antibacterial Activities

Hibiscus rosa-sinensis Leaf Extracted Green Methods, Magneto-Optical and Catalytic Properties of Spinel CuFe2O4 Nano- and Microstructures

Bio Mediated Synthesis of Silver Nanoparticles using Moringa Oleifera Bark Extract and its Antimicrobial Activity against Human Pathogens

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