N. M. Made Gowda

TL;DR: Two simple, rapid and sensitive spectrophotometric methods for the determination of catecholamine derivatives (pyrocatechol, dopamine, levodopa and methyldopa) are developed and are successfully applied in injections and tablets of pharmaceutical preparation.

TL;DR: Two simple and sensitive extractive spectrophotometric methods for the determination of sildenafil citrate are proposed and have been successfully applied to the analysis of bulk drug and its tablets.

TL;DR: The proposedRP-HPLC method has been developed for the quantitation of sildenafil citrate in pure form and its pharmaceutical formulations and is successfully employed for the determination of SC in the tablets.

TL;DR: In this article, a two-pathway mechanism is proposed in which RNHX and RNX− interact with the substrate in the rate-limiting steps, which is consistent with the observed kinetics.

TL;DR: In this article, a series of lanthanide(III) nitrate complexes of 10-dimethylaminopropylphenothiazine (promethazine or PM) with the general formula [Ln(PM)2(NO3)2]NO3, where Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, have been prepared and characterized based on elemental analysis, molar conductivity, magnetic susceptibility, spectroscopic data