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Hyderabad, India

Jeevana Jyothi V.,Rbvrr Womens College | Anjaneyulu C.H.,Osmania University
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2014

Anodization of Niobium in 0.1M L-Ascorbic acid has been carried out. Kinetics of anodic oxidation of Niobium has been studied at a constant current density of 8 mA.cm-2 and at room temperature. The plots of formation voltage vs. time, and reciprocal capacitance vs. time were drawn. From these plots, formation rate, current efficiency and differential field were calculated. The Addition of Solvent (Ethylene glycol at various concentrations) to the aqueous solution of L-ascorbic acid showed improvement in the kinetic results. The surface morphology of the anodic films was also studied by Scanning Electron Micrographs (SEM). Kinetics was studied at different temperatures ranging from 273K to 333K at a constant current density of 8 mA.cm-2. It was observed that kinetic results were found to be increasing linearly with the decrease in temperature. Source


Shukla V.D.,BJR Government Degree College | Jyothi V.J.,Rbvrr Womens College | Anjaneyulu C.,Osmania University
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2014

The kinetics of anodic oxidation of Zircaloy-4 in 0.1M sulphamic acid have been studied under galvanostatic conditions at a current density of 8mA.cm-2 and at room temperature (300K). The conventional plots of formation voltage vs. time and reciprocal capacitance vs. time were found to be non-linear. But with the addition of a millimole (mM) of sodium phosphate to 0.1M sulphamic acid, the conventional plots have become linear even upto break down voltage. This marked improvement in the kinetics can be attributed to the incorporation of phosphate ion into the oxide film. This was confirmed by radiotracer techniques using 32P isotope. The uptake and distribution of 32PO4 3- content in the film has suggested a mechanism for the growth of oxide film via interstitial movement of oxide ions. Migration of anion impurities from one layer to another layer in the oxide film has also been established by transferring the specimen from active to inactive solution of the electrolyte and vice versa and thinning subsequently. Source


Anuradha G.H.,Rbvrr Womens College | Chandra Pal A.V.,Osmania University
E-Journal of Chemistry | Year: 2011

The ligand N(2-benzimidazolyl)acetylacetohydrazone (BAAH) have been synthesized and characterized. Coordination complexes of Cr(III), Mn(II) and Fe(III) have been synthesized with the ligand BAAH. These complexes were characterized on the basis of analytical, conductance, thermal, magnetic data and infrared and electronic spectral data. The ligand BAAH is behaving as a neutral tridentate NNO donar employing two azomethine nitrogens (ring and side chain) and carbonyl oxygen. The ligand and it's metal complexes were tested for anti microbial activity on the gram positive S. Aureus, E. coli and Proteus. Source


Jeevana Jyothi V.,Rbvrr Womens College | Anjaneyulu C.,Osmania University
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2015

Anodization of Zircaloy-2 in 0.1M L-Ascorbic acid has been carried out. Kinetics of anodic oxidation of Zircaloy-2 has been studied at a constant current density of 8 mA.cm-2 and at room temperature. The plots of formation voltage vs. time, reciprocal capacitance vs. time and reciprocal capacitance vs. formation voltage were drawn. From these plots, formation rate, current efficiency and differential field were calculated. The Addition of Solvent (Ethylene glycol) showed better kinetic results. For 20%, 40%, 60% and 80% aquo-glycolic media, the dielectric constant values are low leading to the marked improvement in the kinetics. The surface morphology of the anodic films was also studied by Scanning Electron Micrographs (SEM). Source


Jyothi V.J.,Rbvrr Womens College | Anjaneyulu Ch.,Osmania University
Journal of the Indian Chemical Society | Year: 2013

Anodization of Zircaloy-4 in 0.1 M L-ascorbic acid has been carried out. Kinetics of anodic oxidation of Zircaloy-4 has been studied at a constant current density of 8 mA.cm-2 and at room temperature. The plots of formation voltage vs time, reciprocal capacitance vs time and reciprocal capacitance vs formation voltage were drawn. From these plots, formation rate, current efficiency and differential field were calculated. The addition of solvent (ethylene glycol) showed better kinetic results for 20, 40, 60 and 80% aquo-glycolic media, the dielectric constant values are low leading to the marked improvement in the kinetics. The surface morphology of the anodic films was also studied by Scanning Electron Micrographs (SEM). Source

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