http://nopr.niscpr.res.in/handle/123456789/20186 2026-10-09T20:35:50Z http://nopr.niscpr.res.in/handle/123456789/20204 Title: Synthesis of a novel ion exchanger, ceric vanadate and its application to the separation of ⁹⁰Sr-⁹⁰Y pair Authors: Maji, Samir; Lahiri, Susanta; Basu, S Abstract: A new inorganic ion exchanger, ceric vanadate, has been synthesized and characterized. The ion exchanger is highly stable towards thermal, chemical and radiation effects. The probable formula of the exchanger is 4CeO₂.5V₂O₅.12H₂O. It has high ion exchange capacity for some metal ions. The newly synthesized ion exchanger has been used to separate ⁹⁰Y from ⁹⁰Sr-⁹⁰Y equilibrium mixture. High purity ⁹⁰Y has been eluted out with 0.01 <i>M</i> EDTA solution. Page(s): 1838-1840 2005-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/20203 Title: Ultrasonic measurements in solutions of electrolytes in dimethyl sulfoxide + water mixtures at different temperatures Authors: Mehra, Rita Abstract: Ultrasound speed and density of electrolytes CdCl₂+ KCl have been measured in DMSO and H₂O mixtures at 2 MHz from 25 to.45°C. Various derived parameters such as acoustic impedance, adiabatic compressibility and solvation number have been calculated. The results have been discussed in terms of the nature of electrolyte and solvent mixtures. Solvation number throws light on the solute-solute and solute-solvent interactions. Page(s): 1834-1837 2005-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/20202 Title: Effect of solvents and nucleophiles on the reactivity of allyl bromide — A kinetic study Authors: Reddy, S Ranga; Kalyani, P; Manikyamba, P Abstract: The kinetics of the reaction of allyl bromide with benzoyl thiosemicarbazide has been studied in different protic and aprotic solvents. Correlation of rate constants with different solvent parameters applying linear multiple regression analysis indicates that the non-specific solvent parameters Y, P and nucleophilicity, B, influence the rate of nucleophilic substitution. Using these solvent parameters, the linear solvation energy relationship is derived. Study of the reaction with substituted thiosemicarbazides indicates that structural effects on rate of the reaction are minimal. Page(s): 1831-1833 2005-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/20201 Title: Kinetics and mechanism of oxidation of substituted benzyl alcohol by polymer supported oxidizing agent Authors: Jawanjal, A L; Hilage, N P Abstract: The kinetics of oxidation of monosubstituted benzyl alcohol with polymer supported chromic acid in 1:4 dioxane has been studied. The reaction is found to be of zero order each in [alcohol] and [oxidant). The effect of substituent on the rate of oxidation and the thermodynamic parameters are evaluated. The reaction products have been isolated and characterised by their derivatives. A probable mechanism of oxidation is proposed. Page(s): 1827-1830 2005-09-01T00:00:00Z