Thermal decomposition of nickel hexa(format0) fetrate(DQ decahydrate i.e. Ni3ve(HC00)s]2. 10H,O has been studied upto 913 K in static air atmosphere employing TG,DTG,DTApSC,XRD$!SR, Mossbauer and f i r e d spectroscopic techniques. Dehydration occurs in two stages in the temperature range of 348-423 K. Immediately &r the removal of the last water molecule, the anhydrous complex undergoes decomp...

Nickel ferrite-polyaniline nanocomposite has been prepared and characterized using different techniques. The prepared nanocomposite is used as an adsorbent for the removal of arsenic from aqueous solution of sodium arsenite. The effect of temperature on the equilibrium adsorption of As(III) from aqueous solution on nanocomposite has been investigated. Effect of pH (2-12), contact time (0-70 min...

The frequency dependent dielectric properties of Ni1−xCdxCrxFe2−xO4 (x = 0.0, 0.3, 0.5, 0.7 and 1.0) spinel ferrite system are studied by measuring dielectric constant (ε′), dielectric loss (D) and conductivity (σa.c) at 300 K in the frequency range 100 Hz-2 MHz. The highest value of σa.c and ε′ is observed for x = 0.3 composition. The values ε′ and σa.c decrease with increase in frequency for ...

HIsarna reactor is characterized by a high raw materials versatility and therefore attractive for processing secondary iron sources. Among the that can be recycled through HIsarna, zinc-bearing material has drawn special attention. Based on plant data, once dust-containing Zinc was injected into main reactor, final collected dust with zinc content of 16% achieved which opened up possibilities h...

Ponggol estuary, located on the northeastern coast of Singapore, is heavily impacted by reclamation, dredging, construction and shipping. Tin, lead, nickel, cadmium, copper and zinc in the particulate and dissolved fraction and in sediments were monitored biweekly in the estuary from July 1999 to June 2000. The concentrations of tin, lead, nickel, cadmium, copper and zinc were observed to range...

OBJECTIVE Toxic metal ions have been implicated in the generation of reactive oxygen species (ROS) and nitric oxide (NO). Metallothionines (MT) and plant flavonoids have been reported in the intervention against oxidative damage. We investigated the effect of zinc induced MT and green tea polyphenol (GTP) in reducing the oxidative responses induced by nickel and platinum. METHODS Zinc (10 mg/...

We report the first occurrence of a natural quasicrystal with decagonal symmetry. The quasicrystal, with composition Al71Ni24Fe5, was discovered in the Khatyrka meteorite, a recently described CV3 carbonaceous chondrite. Icosahedrite, Al63Cu24Fe13, the first natural quasicrystal to be identified, was found in the same meteorite. The new quasicrystal was found associated with steinhardtite (Al38...

We report an adjustable magnetic resonance frequency from 1.45 to 2.54 GHz for NiFe2O4 nanoparticles which were prepared by a sol-gel process. X-ray diffraction and scanning electron microscopy results indicate that the samples are polycrystalline nanoparticles, and the size of the particles increases obviously with the thermal treatment temperature. The consequence of the surface composition s...