01648nas a2200193   4500008004100000022001400041245010400055210006900159260007100228300001400299490000700313520092400320100001501244700001701259700001801276700001701294700001901311856012401330       2005                        eng d  a0743-746300aHeavy-metal remediation by a fungus as a means of production of lead and cadmium carbonate crystals0 aHeavymetal remediation by a fungus as a means of production of l  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcAUG  a7220-72240 v213 a<p>We show here that reaction of the fungus, Fusarium oxysporum, with the aqueous heavy-metal ions Pb2+ and Cd2+ results in the one-step formation of the corresponding metal carbonates. The metal carbonates are formed by reaction of the heavy-metal ions with CO2 produced by the fungus during metabolism and thus provide a completely biological method for production of crystals of metal carbonates. The PbCO3 and CdCO3 crystals thus produced have interesting morphologies that are shown to arise because of interaction of the growing crystals with specific proteins secreted by the fungus during reaction. An additional advantage of this approach is that the reaction leads to detoxification of the aqueous solution and could have immense potential for bioremediation of heavy metals. Under conditions of this study, the metal ions are not toxic to the fungus, which readily grows after exposure to the metal ions.</p>1 aSanyal, A.1 aRautaray, D.1 aBansal, Vipul1 aAhmad, Absar1 aSastry, Murali  uhttp://library.ncl.res.in/content/heavy-metal-remediation-fungus-means-production-lead-and-cadmium-carbonate-crystals-001309nas a2200169   4500008004100000022001400041245016200055210006900217260007300286300001200359490000800371520056500379100002000944700001900964700003000983856012601013       2010                        eng d  a0009-261400aHalide ion controlled shape dependent gold nanoparticle synthesis with tryptophan as reducing agent: enhanced fluorescent properties and white light emission0 aHalide ion controlled shape dependent gold nanoparticle synthesi  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN  a271-2750 v4843 a<p>We report the synthesis of Au nanoparticles in presence of two surfactants cetyltrimethyl ammonium chloride (CTAC) and cetyltrimethyl ammonium bromide (CTAB) by reducing Au(3+) ions with tryptophan. Interestingly, triangular shaped particles were seen to form in presence of CTAB, while spherical nanoparticles resulted with CTAC. The highlight of this result is the white light emission from the Au triangles obtained when CTAB is used. These results are supported by lifetime measurements and fluorescence. (C) 2009 Elsevier B. V. All rights reserved.</p>1 aKasture, Manasi1 aSastry, Murali1 aPrasad, Bhagavatula L. V.  uhttp://library.ncl.res.in/content/halide-ion-controlled-shape-dependent-gold-nanoparticle-synthesis-tryptophan-reducing-0