02203nas a2200205   4500008004100000022001400041245009300055210006900148260007300217300001000290490000700300520147600307653001701783653001101800653001801811653001301829100001501842700001701857856012301874       2012                        eng d  a0927-776500aExtracellular biosynthesis of platinum nanoparticles using the fungus fusarium oxysporum0 aExtracellular biosynthesis of platinum nanoparticles using the f  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcSEP  a27-310 v973 a<p>Nanoscience is a blooming field and promises a better future. In order to fabricate nanoparticles in an eco-friendly and inexpensive manner, significant efforts are being made to replace the chemical and physical methods currently being used with the biological methods. Chemical methods are toxic while the physical ones are very expensive. Biological methods, apart from being cost-effective, also provide protein capped nanoparticles which are thus very stable, have good dispersity and do not flocculate, and may find use in various applications. The present work emphasizes on platinum nanoparticles synthesis protocol which occurs at ambient conditions. The fungus Fusarium oxysporum when incubated with hexachloroplatinic acid (H2PtCl6) in ambient conditions reduces the precursor and leads to the formation of stable extracellular platinum nanoparticles. The biosynthesis of platinum nanoparticles was monitored by UV-visible spectroscopy and these nanoparticles were completely characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The nanoparticles are in the size range of 5-30 nm and are stabilized by proteins present in the solution. The reduction process is believed to occur enzymatically, thus creating the possibility of a rational, fungal-based method for the synthesis of nanoparticles over a wide range of chemical compositions. (C) 2012 Elsevier B.V. All rights reserved.</p>10aBiosynthesis10aFungus10aNanoparticles10aplatinum1 aSyed, Asad1 aAhmad, Absar  uhttps://library.ncl.res.in/content/extracellular-biosynthesis-platinum-nanoparticles-using-fungus-fusarium-oxysporum-002065nas a2200241   4500008004100000022001400041245014800055210006900203260010600272300001200378490000800390520114400398653001901542653001101561653001701572653001801589653001101607100001501618700002301633700002101656700001701677856012901694       2013                        eng d  a1386-142500aBiological synthesis of silver nanoparticles using the fungus humicola sp and evaluation of their cytoxicity using normal and cancer cell lines0 aBiological synthesis of silver nanoparticles using the fungus hu  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcOCT  a144-1470 v1143 a<p>Nanoscience is a new born science of the modern era and taps into the potential of particles at nanoscale. Bulk materials reduced to nanoscale dimensions thus obtain unique properties such as electronic, optical, magnetic and chemical. As far as synthesis of nanoparticles is concerned, biological synthesis has recently sparked a great interest as compared to other available chemical and physical methods on account of its eco-friendliness and cost-effectiveness. Here we report, for the first time, the biosynthesis of silver nanoparticles by the thermophilic fungus Humicola sp. The fungus when reacted with Ag+ ions reduces the precursor solution and leads to the formation of extracellular nanoparticles as monitored by ultra violet visible spectroscopy (UV-Vis). The morphology of nanoparticles is found to be spherical with good dispersity as revealed by transmission electron microscopy (TEM). Cell viability assays were carried out to assess the cytotoxicity of silver nanoparticles on NIH3T3 mouse embryonic fibroblast cell line and MDA-MB-231 human breast carcinoma cell line. (C) 2013 Elsevier B.V. All rights reserved.</p>10aCell viability10aFungus10aHumicola sp.10aNanoparticles10aSilver1 aSyed, Asad1 aSaraswati, Supriya1 aKundu, Gopal, C.1 aAhmad, Absar  uhttps://library.ncl.res.in/content/biological-synthesis-silver-nanoparticles-using-fungus-humicola-sp-and-evaluation-their-002033nas a2200217   4500008004100000022001400041245011900055210006900174260010600243300001000349490000800359520120700367653002701574653001701601653000901618653001101627653001801638100001501656700001701671856012701688       2013                        eng d  a1386-142500aExtracellular biosynthesis of CdTe quantum dots by the fungus fusarium oxysporum and their anti-bacterial activity0 aExtracellular biosynthesis of CdTe quantum dots by the fungus fu  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAPR  a41-470 v1063 a<p>The growing demand for semiconductor [quantum dots (Q-dots)] nanoparticles has fuelled significant research in developing strategies for their synthesis and characterization. They are extensively investigated by the chemical route; on the other hand, use of microbial sources for biosynthesis witnessed the highly stable, water dispersible nanoparticles formation. Here we report, for the first time, an efficient fungal-mediated synthesis of highly fluorescent CdTe quantum dots at ambient conditions by the fungus Fusarium oxysporum when reacted with a mixture of CdCl2 and TeCl4. Characterization of these biosynthesized nanoparticles was carried out by different techniques such as Ultraviolet-visible (UV-Vis) spectroscopy, Photoluminescence (PL), X-ray Diffraction (XRD), X-ray Photoelectron spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transformed Infrared Spectroscopy (FTIR) analysis. CdTe nanoparticles shows antibacterial activity against Gram positive and Gram negative bacteria. The fungal based fabrication provides an economical, green chemistry approach for production of highly fluorescent CdTe quantum dots. (C) 2013 Elsevier B.V. All rights reserved.</p>10aantibacterial activity10aBiosynthesis10aCdTe10aFungus10aNanoparticles1 aSyed, Asad1 aAhmad, Absar  uhttps://library.ncl.res.in/content/extracellular-biosynthesis-cdte-quantum-dots-fungus-fusarium-oxysporum-and-their-anti-002847nas a2200289   4500008004100000022001400041245012500055210006900180260000800249300001100257490000700268520189300275653001702168653001102185653001402196653001502210653003102225100001502256700003102271700002102302700002702323700002402350700001702374700002102391700001702412856012802429       2021                        eng d  a1773-224700aBiological synthesis of alpha-Ag2S composite nanoparticles using the fungus Humicola sp. and its biomedical applications0 aBiological synthesis of alphaAg2S composite nanoparticles using   cDEC  a1027700 v663 aSynthesis of alpha-Ag2S (silver sulfide) is a highly challenging task, usually attempted using synthetic, hazardous chemical processes. This report puts efforts to exploring microbial-based eco-friendly alternatives. A facile, onepot biological method for the synthesis of alpha-Ag2S composite nanoparticles (NPs) in an aqueous medium at ambient conditions was established. As prepared alpha-Ag2S composite NPs were efficiently produced from precursors silver nitrate and sodium sulfite. The extracellular biomolecules produced by Humicola sp. reduced the precursor solution and at the same time it capped the formed Ag2S NPs. The characterization performed by different techniques revealed excellent optical, morphological, and structural properties (size, shape distribution, and crystallinity) of the alpha-Ag2S NPs. The change in color from colorless to dark brown indicated the formation of alpha-Ag2S, which was further confirmed by fluorescence and UV-Visible spectroscopy, showing a sharp peak at 410 nm. Morphological analysis of alpha-Ag2S NPs confirmed the spherical shape, and narrow size distribution. alpha-Ag2S NPs were found to be potent in antimicrobial applications owing to their high dispersibility in water and capping by extracellular biomolecules secreted by Humicola sp. The anti-cancer activity for alpha-Ag2S performed using human breast cancer cell line (ZR-75-1) and human Burkitt's lymphoma cancer (Daudi). The biocompatibility test was performed using human peripheral blood mononuclear cells (PBMCs) for alpha-Ag2S NPs. The anti-leishmania activity was also determined for alpha Ag2S NPs in-vitro using the standard anti-promastigote protocol (Leishmania donovani promastigotes). This extracellular system is an economically and environmentally benign route for the biosynthesis of alpha-Ag2S NPs having desired surface, structure and biomedical properties.10aCytotoxicity10aFungus10aHemolysis10aHumicolasp10aSilver sulfide(alpha-Ag2S)1 aSyed, Asad1 aSaedi, Marzouq, Hussain Al1 aBahkali, Ali, H.1 aElgorban, Abdallah, M.1 aKharat, Maheshkumar1 aPai, Kalpana1 aGhodake, Gajanan1 aAhmad, Absar  uhttps://library.ncl.res.in/content/biological-synthesis-alpha-ag2s-composite-nanoparticles-using-fungus-humicola-sp-and-its