02201nas a2200265   4500008004100000022001400041245010700055210006900162260009500231300001000326490000600336520126700342653001701609653001201626653001101638653000901649653002301658653001801681100001701699700002501716700002601741700001701767700001901784856013201803       2005                        eng d  a1550-703300aExtra-/intracellular biosynthesis of gold nanoparticles by an alkalotolerant fungus, trichothecium sp.0 aExtraintracellular biosynthesis of gold nanoparticles by an alka  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScMAR  a47-530 v13 a<p>The development of reliable, eco-friendly processes for the synthesis of nanoscale materials is an important aspect of nanotechnology. As part of our ongoing investigation into the use of fungi for nanoparticle synthesis, we report herein that depending on the reaction conditions of the fungus Trichothecium sp. with aqueous gold ions, gold nanoparticle synthesis can be controlled to occur either within the biomass or extracellularly. Moreover, we have found that reaction of gold ions with the Trichothecium sp. fungal biomass under stationary conditions results in the rapid extracellular formation of gold nanoparticles of spherical, rod-like and triangular morphology whereas reaction of the biomass under shaking conditions resulted in intracellular growth of the nanoparticles. It is believed that on changing the reaction conditions of the fungus with gold ions, the enzymes and proteins which are being released into the medium under stationary conditions do not get released under shaking conditions resulting in the formation of extracellular or intracellular gold nanoparticles respectively. The gold nanoparticles are not toxic to the cells and the cells continued to grow after the biosynthesis of the gold nanoparticles in both the cases.</p>10aBiosynthesis10aenzymes10aFungus10aGold10aMorphology Control10aNanoparticles1 aAhmad, Absar1 aSenapati, Satyajyoti1 aKhan, Mohammad, Islam1 aKumar, Rajiv1 aSastry, Murali  uhttps://library.ncl.res.in/content/extra-intracellular-biosynthesis-gold-nanoparticles-alkalotolerant-fungus-trichothecium-sp-002305nas a2200277   4500008004100000022001400041245009800055210006900153260011100222300001200333490000700345520133600352653001701688653001201705653001001717653001801727653001801745100002501763700001501788700001701803700001901820700002601839700001701865700001701882856012801899       2014                        eng d  a1573-413700aExtracellular biosynthesis of metal sulfide nanoparticles using the fungus fusarium oxysporum0 aExtracellular biosynthesis of metal sulfide nanoparticles using   aEXECUTIVE STE Y-2, PO BOX 7917, SAIF ZONE, 1200 BR SHARJAH, U ARAB EMIRATESbBENTHAM SCIENCE PUBL LTDcJUL  a588-5950 v103 a<p>The development of reliable, eco-friendly processes for the synthesis of nanomaterials is an important aspect of nanotechnology. One approach that shows immense potential is based on the biosynthesis of nanoparticles using microorganisms such as bacteria. In this report, we demonstrate the extracellular biosynthesis and complete characterization of metal sulfide (PbS, ZnS, MnS and NiS) nanoparticles using fungus, Fusarium oxysporum. We observed that the exposure of aqueous solution of 1 mM metal sulfate to fungus Fusarium oxysporum resulted in the formation of highly stable technologically important metal sulfide semiconductor nanoparticles. Fusarium oxysporum synthesizes lead sulfide and zinc sulfide nanoparticles of fractal type structure whereas manganese sulfide and nickel sulfide nanoparticles are of variable polydispersed morphology. The variable morphology may be due to the dissimilar interaction of metal sulfide nanoparticles with capping proteins secreted by the fungus in solution. The nanoparticles solution is found to be extremely stable with little evidence of aggregation even after a month of storage. The long term stability of the nanoparticles is due to the proteins secreted by fungus in the nanoparticle solution which bind to the surface of the nanoparticles and thus prevent aggregation.</p>10aBiosynthesis10aenzymes10afungi10ametal sulfide10aNanoparticles1 aSenapati, Satyajyoti1 aSyed, Asad1 aKhan, Shadab1 aPasricha, Renu1 aKhan, Mohammad, Islam1 aKumar, Rajiv1 aAhmad, Absar  uhttps://library.ncl.res.in/content/extracellular-biosynthesis-metal-sulfide-nanoparticles-using-fungus-fusarium-oxysporum-0