Oxidation of alanine by quinquevalent Vanadium in the absence and in presence of cetyl trimethyl ammonium bromide (CTAB) is routed through the same mechanism as shown by the kinetic study. The oxidation rate is catalyse in the presence of cetyl trimethyl ammonium bromide. The acceleration has been traced to partition of the quinquevalent Vanadium species as well as the acid concentration between the aqueous and micellar phase.

The oxidation is first order each in substrate and the oxidant. The reaction follows an acid catalysed path, exhibiting second order dependence in H* Bunnett plot indicate that water acts as nucleophile. Protonated form of oxidant has been postulated as the reactive oxidizing species. The rate study at different temperatures enabled us to calculate activation parameters. A suitable mechanism has been proposed.
 

Various membrane parameter such as membrane potential, bi­ionic potential, permselectivity of these membranes have been determined. Thermodynamically effective fixed charge density and the impedance characteristics of inorganic precipitate membranes have also been analysed in order to understand the mechanism of ionic diffusion through bio-membranes. The observed value of membrane capacitance and resistance were found to be dependent on the concentration of bathing electrolyte and applied frequency. The complex impedance spectra have been found to deviate from the theoretical predicitions at low frequencies due to non homogenious and rough surface of the membrane.

Elecrtrochemistry of l-EQ/Q redox species in different medium is studied by cyclic voltammetric technique. The voltammograms show single anodic and cathodic peaks. The peak separation shows that it undergoes quasi-reversible diffusion controlled controlled with slow electron transfer which is the rate determining step. The reaction takes place at pH 4 in anionic medium. Kinetic parameters such as the rate constant and diffusion coefficients are presented. The adsorption on the electrode surface made a stable modification.The anodic peak current is varied in the order F'>Cf >Br". Energetically and analytically favourable medium for H2Q/Q redox system has been studied.

Like other cities of Rajasthan, Kota is also known for its architecture of dominion period. Many buildings constructed during state time. Historical Jagmandir, an enchanting mini palace build of red stone amid the picturesque artificial tank Kishore Sagar is one of them. On one end Kishore Sagar Tank is linked to Kota barrage, which is built on river Chambal and on another end to right main canal. When right main canal is flowing in winter and spring seasons the water quality of KST is good but in lean seasons water hold in KST is contaminated by wastewater generated from nearby residential and commercial area. Therefore study in order to seasonal and spatial variation in water quality physico-chemical parameters was determined from October 07 to May 08. Aggressive index (Al) and Langelier Saturation Index (LSI) were calculated to interprets the impact of water quality on Jagmandir Palace, The results show adverse effect in summer sessions. To prevent this historical monument some corrective measures are suggested.

Epoxy ester resins (EPR) were prepared by reaction between Diglycidyl ether of resacetophenone (DGE-RAP) and various acrylic acid derivatives. All the epoxy ester resins were characterized by elemental analysis, viscosity, unsaturation and IR spectral studies. Curing characteristic of DGE-RAP and their mixture with vinyl monomers was monitored by differenctial scanning calorimetry (DSC). Thermal stability of cured materials was determined by thermogravimetric analysis (TGA). The glass fibre reinforced composite of these resins and cryolite were prepared and characterized by chemical and mechanicalproperties.

Ziprasidone is a typical antipsychotic agent. Two simple, sensitive and accurate spectrophotometric methods have been developed for the determination of Ziprasidone hydrochloride (ZPD) in pure state and in its pharmaceutical formulations. The developed Method A is based on the diazocoupling reaction of the Brotton-Marshall's reagent with drug and it shows maximum absorption at max 540 nm; Linearity in the range of 2-10 pg/mL. Method B is based on the reaction between drug and 1, 10-phenanthroline with ferric chloride and orthophosphoric acid to form a colored chromogen and it shows maximum absorption at A. ,_nax 520 nm and Linearity in the range of 4-20 pg/mL. The results obtained were statistically evaluated and were found to be accurate and reproducible.

The reactions of hexabutylditin with triphenyl phosphine and arsine have been studied in the molar ratios of 1:2.The reactions were found to be slow. Complexes of the type [R3Sn]2.2LPhj(where R= -C4H9 and L=P or As) were isolated. It has been observed that tin-tin bond was not cleaved in these reactions. Two molecules of the triphenyl phosphine or arsine form adducts.

The resulting adducts have been isolated in the form of yellow solid or liquid. They are soluble in common organic solvents and are sensitive to atmospheric moisture. These adducts probably attain a coordination number of five with trigonal bipyramidal structure.