01699nas a2200241   4500008004100000022001400041245007800055210006900133260009500202300001400297490000600311520088200317653001901199653000901218653001201227653001601239653001801255653002301273100002001296700001701316700001901333856010501352       2005                        eng d  a1533-488000aSynthesis of gold nanospheres and nanotriangles by the Turkevich approach0 aSynthesis of gold nanospheres and nanotriangles by the Turkevich  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScOCT  a1721-17270 v53 a<p>Gold nanoparticles of triangular morphology possess interesting optical properties with potential application in medicine and infrared absorbing coatings, however, little is known about conditions that favor their growth. In this paper, we have reinvestigated a time-tested recipe for the formation of gold nanospheres by citrate reduction of aqueous gold ions under boiling conditions (Turkevich recipe). Our principle findings are that gold nanotriangle formation is kinetically controlled and is highly favored at low temperatures. Furthermore, the presence of chloride ions from the precursor chloroaurate ions plays a major role in promoting the growth of [111] oriented triangular/truncated triangular particles. The presence of bromide and iodide ions that possess the ability to replace surface-bound chloride ions inhibits triangle formation to varying degrees.</p>10aCrystal growth10aGold10ahalides10ananospheres10ananotriangles10aTemperature effect1 aShankar, S., S.1 aBhargava, S.1 aSastry, Murali  uhttps://library.ncl.res.in/content/synthesis-gold-nanospheres-and-nanotriangles-turkevich-approach-102178nas a2200229   4500008004100000022001400041245013100055210006900186260008800255300001200343490000700355520127800362653001001640653002901650653002001679653002301699653001801722100002501740700002801765700002301793856013201816       2008                        eng d  a0352-513900aRapid liquid-liquid extraction of thallium(III) from succinate media with 2-octylaminopyirdine in chloroform as the extractant0 aRapid liquidliquid extraction of thalliumIII from succinate medi  aKARNEGIJEVA 4, PO BOX 462, YU-11001 BELGRADE, YUGOSLAVIAbSERBIAN CHEMICAL SOCcJAN  a435-4510 v733 a<p>A simple solvent extraction study of thallium(III) was conducted. Selective and quantitative extraction of thallium(III) by 2-octylaminopyridine (2-OAP) in chloroform occurred from aqueous sodium succinate medium (0.0075 M) at pH 3.0. Thallium(III) was back extracted with acetate buffer (pH 4.63). The effect of the concentration of succinate and 2-OAP, the role of various diluents, stripping agents, loading capacity of 2-OAP, equilibrium time and aqueous:organic volume ratio on the extraction of thallium(III) was studied. The stoichiometry of the extracted species was determined based on the slope analysis method and found to be 1: 2: 1 (metal: acid: extractant). The temperature dependence of the extraction equilibrium constant was also examined to estimate the apparent thermodynamic functions Delta H, Delta G and Delta S for the extraction reaction. The method is free from interference of a large number of cations and anions. The method was used for the selective extraction of thallium(III) from its binary mixture with Zn(II), Cd(II), Hg(II), Bi(ill), Pb(II), Se(IV), Te(IV), Sb(III), Ga(III), In(III), AI(III), TI(I) and Fe(III). The proposed method was applied to the synthetic mixtures and alloys. It is simple, selective, rapid and eco-friendly.</p>10a2-OAP10aliquid-liquid extraction10asuccinate media10aTemperature effect10athallium(III)1 aMahamuni, Sandip, V.1 aWadgaonkar, Prakash, P.1 aAnuse, Mansing, A.  uhttps://library.ncl.res.in/content/rapid-liquid-liquid-extraction-thalliumiii-succinate-media-2-octylaminopyirdine-chloroform-001627nas a2200241   4500008004100000022001400041245009600055210006900151260007300220300001400293490000700307520076800314653001401082653002301096653002701119100002001146700001801166700002001184700001901204700001701223700002201240856012301262       2009                        eng d  a1293-255800aEffect of sintering temperature and thermoelectric power studies of the system MgFe2-xCrxO40 aEffect of sintering temperature and thermoelectric power studies  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC  a2075-20790 v113 a<p>Mixed metal oxides showing the spinel structure exhibit interesting structural and electrical properties. Substances with specific compositions in the system MgFe2-xCrxO4 were synthesized by the simple co-precipitation method and have been investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM) to study the effect of temperature on the size of particles and grains. The infrared spectrum shows, two strong bands around 600 and 500 cm(-1). An elemental composition of one of the samples, MgFeCrO4 was found by energy dispersive X-ray spectroscopy (EDS). The thermoelectric power measurements carried out from room temperature to 500 degrees C, show both n-type and p-type behavior. (C) 2009 Elsevier Masson SAS. All rights reserved.</p>10asynthesis10aTemperature effect10aThermoelectric studies1 aHankare, P., P.1 aVader, V., T.1 aSankpal, U., B.1 aGavali, L., V.1 aSasikala, R.1 aMulla, Imtiaz, S.  uhttps://library.ncl.res.in/content/effect-sintering-temperature-and-thermoelectric-power-studies-system-mgfe2-xcrxo4-0