¹Department of chemistry, Avinashilingam Institute for Home Science and  Higher Education for Women, Coimbatore – 641043, Tamilnadu (India)

²Department of Chemistry, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore – 641043, Tamilnadu (India)

E-mail : umadevisadhasivam@gmail.com

In the present work adsorption studies of Acid blue110 dye ontoBauheniaRacemosa seed pod carbon has been studied in a batch system. The effect of concentration of the dye solution, adsorbent dosage, contact time, pH and temperature on the adsorption process was examined and the optimum experimental conditions were identified. The maximum removal of dye was obtained at pH 2. The percentage removal of the dye decreased with an increase in initial concentration. Though the R2 values of pseudo first and second order rate equations are very nearer to each other the qe values are in close agreement with second order reaction.

¹Chemical Kinetics Laboratory, Department of Chemistry, Pacific University, Udaipur (India)
²Asstt. Prof. of Chemistry, Govt. P. G. College, Neemuch, 458441 M.P. (India)

Email- bkdangarh11@gmail.com

The comparative study of oxidation of alanine and phenyl alanine by pyridiniumdichromate has been studied spectrophotometrically in the presence of perchloric acid in acetic acid-aquo (v/v) medium. The reaction is first order with respect to oxidant and inverse first order in [H+]. The rate of reaction increases with a decrease in the polarity of solvent indicating an ion–dipole interaction in the slow step. The reactions exhibit no primary kinetic isotope effect. The activation parameters have been evaluated. The reaction mechanism involving the formation of chromate-ester between unprotonated PDC and unprotonated amino acid followed by C–C bond fission in the slow step has been suggested.

Department of Chemistry, Dayanand Girls P.G. College, Kanpur (India)
E-mail : shashi.agrwl@gmail.com

In the present study the antioxidant effect of the tubers of Cyperus rotundus Linn. collected from Kannauj (U.P.) was assessed. The methanol extract of tubers of Cyperus rotundus were evaluated for antioxidant activity by 1, 1-diphenyl – 2 – picrylhydrazyl (DPPH) radical scavenging activity and reducing power assay. The total phenolic contents were estimated by Folin ciocalteu and aluminium chloride methods, respectively. Total phenol compounds were expressed in terms of equivalent amount of gallic acid (GAE) which is using as standard. Gallic acid and ascorbic acid were used as a reference standard.