Facile bio-synthesis of gold nanoparticles by using extract of Hibiscus sabdariffa and evaluation of its cytotoxicity against U87 glioblastoma cells under hyperglycemic condition

Mishra, Pratik; Ray, Sambit; Sinha, Sayantan; Das, Bhaskar; Khan, Md. Imran; Behera, Susant K.; Yun, Soon‐Il; Tripathy, Suraj K.; Mishra, Amrita

doi:10.1016/j.bej.2015.09.021

Cited by 101 publications

(44 citation statements)

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“…These results revealed that the more acidic condition was favorable for the formation of Au NPs (pH 2.62). At pH 3.45, a fraction of reductants in the Djulis shell extract may degrade or change their activity and result in agglomeration of the Au NPs . At higher values (pH values 5.74, 7.82, 9.09, and 11.26), most of the reductants may degrade or change their activity and bring about decrease of Au NPs formation .…”

Section: Resultsmentioning

confidence: 99%

“…At pH 3.45, a fraction of reductants in the Djulis shell extract may degrade or change their activity and result in agglomeration of the Au NPs . At higher values (pH values 5.74, 7.82, 9.09, and 11.26), most of the reductants may degrade or change their activity and bring about decrease of Au NPs formation . Previous studies have reported that the synthesis of Au NPs generally favors a nearly physicochemical condition for the biological extract being used as a reducing agent .…”

Section: Resultsmentioning

confidence: 99%

“…Various plants, including Annona squamosal , Swertia chirata , Momordica cochinchinensis , Gnidia glauca , Medicago sativa , Mussaenda glabrata , Acer pentapomicum , Mimusops elengi , and Hibiscus sabdariffa , have been proposed for Au NP synthesis. For plants containing betanin, the reducing power of Djulis ( Chenopodium formosanum ) with 69.93 µmol Fe 2+ /g for ferric reducing antioxidant power (FRAP) was higher than red‐fleshed Hylocereus polyrhizus (32.50 µmol Fe 2+ /g) for synthesis of NPs .…”

Section: Introductionmentioning

confidence: 99%

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Green biosynthesis of gold nanoparticles using Chenopodium formosanum shell extract and analysis of the particles' antibacterial properties

et al. 2019

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BACKGROUND Various physical and chemical methods for synthesis of metal nanoparticles have had some drawbacks. Therefore, green synthesis of gold nanoparticles (Au NPs) has became one of the most crucial emerging areas of nanobiotechnology. In the present study, plant‐mediated synthesis of Au NPs was performed using Djulis (Chenopodium formosanum) shell extract as a reducing and stabilizing agent. RESULTS Reaction parameters were manipulated to optimize the Au NPs using a UV‐visible spectrophotometer. Optimized Au NPs with a surface plasmon resonance band at 533 nm were prepared using a 744 µg mL−1 extract and a solution of pH 2.62 chloroauric acid (HAuCl4·3H2O) at 40 °C. High‐resolution transmission electron microscopy (HR‐TEM) results indicated that most of the resultant Au NPs were spherical in shape and exhibited a mean size of 8 ± 6 nm. Energy‐dispersive X‐ray spectroscopy (EDS), and selected area electron diffraction (SAED), and X‐ray diffraction (XRD) confirmed the elemental gold and crystalline nature of the resultant NPs. FTIR spectrum analysis indicated the critical role of phenolic groups in the reduction of Au3+ ions and stabilization of the formed Au NPs. Moreover, the synthesized Au NPs possessed antibacterial activity for Escherichia coli and Staphylococcus aureus. CONCLUSION In this study, Au NPs were synthesized with high efficiency and stability using Djulis shell extract, and related antibacterial applications were demonstrated. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Green biosynthesis of gold nanoparticles using Chenopodium formosanum shell extract and analysis of the particles' antibacterial properties

et al. 2019

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“…For example, aptamers within one QD can bind to the same target biomolecule (i.e. a protein with more than one homogeneous binding site) and might decrease the signal intensity (Mayoral et al, 1997;Lukianova-Hleb et al, 2012;Martinolich et al, 2012;Mkenzie et al, 2012;Monguzzi et al, 2014;Montano et al, 2014;Luo et al, 2015;Madden et al, 2015;Mahyad et al, 2015;Matea et al, 2015;Mishra et al, 2016).…”

Section: Semiconductor Quantum Dotsmentioning

confidence: 99%

Hybrid nanomaterial: biocolloidals

Gözübenli¹,

Yasun²,

Dilsiz³

2017

Turk J Biol

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Nanomaterials-based diagnostics have tremendous advantages over other conventional diagnostic systems in terms of sensitivity, specificity, and portability owing to the unique intrinsic properties of nanomaterials. Thus, there is a substantial need to develop and employ a broad spectrum of nanomaterials for biological and diagnostic applications. In this review, we focus on nanomaterials-assisted disease diagnosis utilizing different techniques such as photoluminescence, colorimetry, fluorescence, electrochemistry, microarray methods, surface plasmon resonance, and surface-enhanced Raman spectroscopy. In these techniques, different nanomaterials, including but not limited to gold and silver materials, metal oxides, and semiconductors, were employed according to their all-purpose chemical and physical properties. As the new properties of nanomaterials are discovered, their contributions to nanobiotechnology applications are vastly increased. In this review, the features of the selected nanobiomaterials, biological tag-modified nanomaterials, and their outstanding applications for the detection of specific biotargets have been summarized according to the latest studies. Nanomaterials contribute to the fields of photo/chemotherapy and biomedical imaging in particular, since all the biological events happen within this size range and beneficiary roles of nanoparticles (NPs) are countless in biomedical applications due to their unique physical and chemical properties. However, due to the necessity of specificity and selectivity, there is a clear ambition to study bioconjugation of NPs to increase the efficiency of the targeted biological applications. Thus, the combination of the specificity and the intrinsic properties of biohybrid NPs facilitate diagnostic and therapeutic applications.

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“…The nanoparticles synthesized by biosynthesis method result in different morphologies such as spherical shaped [25], fibril shaped [26], hexagonal shaped [27], cubical shaped [28] and triangular shaped [29] nanoparticles. Plant extracts from Terminalia cuneata is used to synthesize silver nanoparticles [30], Hibiscus sabdariffa is used to synthesis of gold nanoparticles [31], Magnolia kobus leaf extracts are used to synthesis of copper nanoparticles [32], peels of Punica granatum are used for synthesizing ZnO nanoparticles [33]. Owing to the above said, the biosynthesis of metal oxide nanoparticles is considered in the literature as a reliable method.…”

Section: Introductionmentioning

confidence: 99%

Microwave assisted biosynthesis of rice shaped ZnO nanoparticles usingAmorphophallus konjactuber extract and its application in dye sensitized solar cells

Kumar¹,

Sakthivel²,

Balasubramanian³

2017

Materials Science-Poland

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Rice shaped ZnO nanoparticles have been synthesized for the first time by a biological process using Amorphophallus konjac tuber extract and used as a photoanode in a dye sensitized solar cell. The glucomannan present in aqueous tuber extract acted as a reducing agent in the synthesis process, further it also acted as a template which modified and controlled the shape of the nanoparticles. The synthesized nanoparticles were dried by microwave irradiation followed by annealing at 400°C. The FESEM and TEM images confirmed that the synthesized ZnO nanoparticles had rice shaped morphology. Furthermore, the X-ray diffraction studies revealed that the prepared ZnO nanoparticles exhibited wurtzite phase with average particle size of 17.9 nm. The UV-Vis spectroscopy studies confirmed the value of band gap energy of biosynthesized ZnO nanoparticles as 3.11 eV. The photoelectrodes for dye sensitized solar cells were prepared with the biosynthesized ZnO nanoparticles using doctor blade method. The photoelectrode was sensitized using the fruit extract of Terminalia catappa, flower extracts of Callistemon citrinus and leaf extracts of Euphorbia pulcherrima. The dye sensitized solar cells were fabricated using the sensitized photoelectrode and their open circuit voltages and short circuit current densities were found to be in the range of 0.45 V to 0.55 V and 5.6 mA/cm 2 to 6.8 mA/cm 2 , respectively. Thus, the photovoltaic performances of all the natural dye sensitized ZnO solar cells show better conversion efficiencies due to the morphology and preparation technique.

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Facile bio-synthesis of gold nanoparticles by using extract of Hibiscus sabdariffa and evaluation of its cytotoxicity against U87 glioblastoma cells under hyperglycemic condition

Cited by 101 publications

References 52 publications

Green biosynthesis of gold nanoparticles using Chenopodium formosanum shell extract and analysis of the particles' antibacterial properties

Green biosynthesis of gold nanoparticles using Chenopodium formosanum shell extract and analysis of the particles' antibacterial properties

Hybrid nanomaterial: biocolloidals

Microwave assisted biosynthesis of rice shaped ZnO nanoparticles usingAmorphophallus konjactuber extract and its application in dye sensitized solar cells

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