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Salunke, Bipinchandra K.,Sawant, Shailesh S.,Kang, Tae Koo,Seo, Deok Yun,Cha, Youngjong,Moon, Sun A.,Alkotaini, Bassam,Sathiyamoorthi, Ezhaveni,Kim, Beom Soo Hindawi Limited 2015 Journal of nanomaterials Vol.2015 No.-
<P>Silver nanoparticles (AgNPs) as a result of their excellent optical and electronic properties are promising catalytic materials for various applications. In this study, we demonstrate a novel approach for enhanced degradation of cellulose using biosynthesized AgNPs in an enzyme catalyzed reaction of cellulose hydrolysis by cellulase. AgNPs were synthesized through reduction of silver nitrate by extracts of five medicinal plants (<I>Mentha arvensis</I>var.<I>piperascens, Buddleja officinalis</I>Maximowicz,<I>Epimedium koreanum</I>Nakai,<I>Artemisia messer-schmidtiana</I>Besser, and<I>Magnolia kobus</I>). An increase of around twofold in reducing sugar formation confirmed the catalytic activity of AgNPs as nanocatalyst. The present study suggests that immobilization of the enzyme onto the surface of the AgNPs can be useful strategy for enhanced degradation of cellulose, which can be utilized for diverse industrial applications.</P>
Salunke, Bipinchandra K.,Sawant, Shailesh S.,Lee, Sang-Ill,Kim, Beom Soo Rapid Communications of Oxford Ltd in association 2016 World journal of microbiology biotechnology Vol.32 No.5
<P>Nanoparticles, the elementary structures of nanotechnology, are important materials for fundamental studies and variety of applications. The different sizes and shapes of these materials exhibit unique physical and chemical properties than their bulk materials. There is a great interest in obtaining well-dispersed, ultrafine, and uniform nanoparticles to delineate and utilize their distinct properties. Nanoparticle synthesis can be achieved through a wide range of materials utilizing a number of methods including physical, chemical, and biological processes with various precursors from liquids and solids. There is a growing need to prepare environmentally friendly nanoparticles that do not produce toxic wastes in their process synthesis protocol. This kind of synthesis can be achieved by green environment benign processes, which happen to be mostly of a biological nature. Microorganisms are one of the most attractive and simple sources for the synthesis of different types of nanoparticles. This review is an attempt to provide the up-to-date information on current status of nanoparticle synthesis by different types of microorganisms such as fungi, yeast, bacteria, cyanobacteria, actinomycete, and algae. The probable biosynthesis mechanism and conditions for size/shape control are described. Various applications of microbially synthesized nanoparticles are summarized. They include antibacterial, antifungal, anticancer, larvicidal, medical imaging, biosensor, and catalytic applications. Finally, limitations and future prospects for specific research are discussed.</P>
Enhancement of Antibacterial Effect by Biosynthesized Silver Nanoparticles with Antibiotics
Salunke, Bipinchandra K.,Sawant, Shailesh S.,Kim, Beom Soo American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.7
<P>The bark extract of medicinal plant Hovenia dulcis was used for rapid, low cost, and ecofriendly synthesis of silver nanoparticles (AgNPs). The biosynthesized AgNPs demonstrated absorption peak at 433 nm in UV-visible spectroscopy and binding energies at 368.2 and 374 eV in X-ray photoelectron spectroscopy. Transmission electron microscopy micrographs of AgNPs exhibited spherical shapes with average size of 33 nm and selected area electron diffraction pattern suggested their crystalline nature. Fourier transform-infrared spectroscopy analysis revealed role of plant metabolites as reducing and capping agent in synthesis of AgNPs. Enhancement of antibacterial potential of biosynthesized AgNPs after combination with ten different antibiotics with diverse documented mode of action is reported in the present study. The antibacterial effect of AgNP combination with antibiotics was observed to be synergistic. The highest synergistic effects were 3.04 folds for Penicillin against Bacillus cereus and 1.55 folds for Tetracycline against Escherichia coli. This unique property of AgNPs can be therapeutically valuable for fabrication of innovative hybrid drugs for enhancing effectiveness of antibiotics to kill bacteria.</P>
Phyto-synthesized silver nanoparticles for biological applications
Bipinchandra K. Salunke,Ezhaveni Sathiyamoorthi,Tuan Kiet Tran,김범수 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.4
Silver nanoparticles (AgNPs) are valuable metal nanoparticles that exhibit exceptional properties compared to their bulk materials. Pronounced surface area, quantum confinement effect complemented by small particle dimension, and many other extraordinary characteristics make AgNPs suitable in a variety of applications. Different methods have been adopted to synthesize AgNPs. Biological methods can formulate AgNPs in an environmentally friendly manner without producing toxic waste. Among the biological methods, plants are simple and attractive sources for AgNP synthesis. Compared to AgNPs produced via other modes of synthesis, phyto-synthesized AgNPs, due to their safety features, have been found to be advantageous for a variety of applications, especially biological applications. Strong research efforts have investigated the utility of phyto-synthesized AgNPs for different applications. Investigators are coming up with innovative applications of phyto-synthesized AgNPs for the development of science and technology and to benefit humankind. The present article focuses on phyto-synthesized AgNPs for biological applications, with a brief review of their synthesis, mechanism, and size/shape control.
Salunke, Bipinchandra K,Sawant, Shailesh S,Kim, Beom Soo Humana Press 2014 Applied biochemistry and biotechnology Vol.174 No.2
<P>Silver nanoparticles (AgNPs) were synthesised using Kalopanax septemlobus plant leaf extracts. UV-visible spectrophotometric, Fourier-transform infrared, electron dispersive X-ray spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses confirmed synthesis of AgNPs. TEM micrographs revealed presence of well-dispersed AgNPs predominantly of small size and different shapes with an average particle size of 30.8 nm. Antimicrobial susceptibility tests of AgNP treatments revealed variability in sensitivity of bacteria Bacillus cereus and Saccharophagus degradans under study. Minimum inhibitory concentration (MIC) values of the AgNPs for B. cereus and S. degradans were found to be 30 and 10 μg/mL, respectively. The mixed culture of B. cereus and S. degradans treated with AgNPs at 10 μg/mL showed increase in growth with time, suggesting survival of bacteria in liquid media. The plating of mixed culture before AgNP treatment showed presence of both bacteria, but 24-h-old mixed culture treated with AgNPs at the concentration of 10 μg/mL showed presence of B. cereus colonies. SEM micrographs revealed damage to S. degradans cells but no effect on B. cereus cells after AgNP treatment. Confocal microscopic observations of AgNP-treated mixed cultures by Nile blue A staining indicated intact polyhydroxyalkanoates producing flourescent cells of B. cereus but damage and deformities in S. degradans cells. This study suggests that AgNPs can selectively inhibit growth of S. degradans and retain B. cereus at MIC of S. degradans. This report is a case study for selective inhibition of one bacteria and growth of the other in a culture using plant-synthesized silver nanoparticles.</P>
Salunke, Bipinchandra K.,Sawant, Shailesh S.,Lee, Sang-Ill,Kim, Beom Soo Springer-Verlag 2015 Applied microbiology and biotechnology Vol.99 No.13
<P>Microorganisms are one of the most attractive and simple sources for the synthesis of different types of metal nanoparticles. The synthesis of manganese dioxide nanoparticles (MnO2 NPs) by microorganisms from reducing potassium permanganate was investigated for the first time in the present study. The microbial supernatants of the bacterium Saccharophagus degradans ATCC 43961 (Sde 2-40) and of the yeast Saccharomyces cerevisiae showed positive reactions to the synthesis of MnO2 NPs by displaying a change of color in the permanganate solution from purple to yellow. KMnO4-specific peaks also disappeared and MnO2-specific peaks emerged at an absorption maximum of 365?nm in UV-visible spectrophotometry. The washed Sde 2-40 cells did not show any ability to synthesize MnO2 NPs. The medium and medium constituents of Sde 2-40 showed similar positive reactions as supernatants, which indicate the role of the Sde 2-40 medium constituents in the synthesis of MnO2 NPs. This suggests that microorganisms without nanoparticle synthesis ability can be misreported for their abilities to synthesize nanoparticles. S. cerevisiae washed cells showed an ability to synthesize MnO2 NPs. The strategies of keeping yeast cells in tea bags and dialysis membranes showed positive tests for the synthesis of MnO2 NPs. A Fourier transform-infrared spectroscopy study suggested roles for the proteins, alcoholic compounds, and cell walls of S. cerevisiae cells in the synthesis of MnO2 NPs. Electron-dispersive X-ray spectroscopy analyses confirmed the presence of Mn and O in the sample. X-ray?photoelectron?spectroscopy revealed characteristic binding energies for MnO2 NPs. Transmission electron microscopy micrographs revealed the presence of uniformly dispersed hexagonal- and spherical-shaped particles with an average size of 34.4?nm. The synthesis approach using yeast is possible by a simple reaction at low temperature without any need for catalysts, templates, or expensive and precise equipment. Therefore, this study will be useful for the easy, cost-effective, reliable, and eco-friendly production of nanomaterials.</P>
구현석,Bipinchandra K. Salunke,Bilal Iskandarani,오원균,김범수 한국생물공학회 2017 Biotechnology and Bioprocess Engineering Vol.22 No.5
The ability of Fe3O4 Fenton-like reaction to produce glucose from lignocellulosic biomass was investigated. Fe3O4 magnetite nanoparticles were chemically synthesized from iron salts (a mixture of 1 M FeCl2 and 2M FeCl3) using an ammonia solution (30% NH4OH). The synthesized Fe3O4 nanoparticles were further characterized by X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy, scanning electron microscopy, and transmission electron microscopy. Reed stems and rice straw biomasses pretreated with optimized Fenton-like reagents (Fe3O4 and H2O2) increased glucose production by 177 and 87%, respectively, compared to the control without the catalysts.
Biosynthesis of graphene‐metal nanocomposites using plant extract and their biological activities
Wen, Jing,Salunke, Bipinchandra K,Kim, Beom Soo WILEY & SONS 2017 Journal of Chemical Technology & Biotechnology Vol. No.
<P>CONCLUSION: The present results show that GN/Ag and GN/Au nanocomposites can be ecofriendly synthesized using Xanthium strumarium leaf extract. The graphene/metal nanocomposites produced may be less-toxic, biocompatible, and useful for bioapplications. (C) 2016 Society of Chemical Industry</P>