Two simple, accurate and sensitive spectrophotometric methods were developed for the determination of ticlabendazole in bulk and pharmaceutical formulation. These methods were based on the formation of ion-pair association complex (1:1) with bromocresol purple (BCP) and bromophenol blue (BPB). The coloured products were extracted into chloroform and measured spectrophotometrically at 420 nm. Li...

Phlebotominae sand fly specimens were prepared for histological and physiological studies. Different fixatives were tested on sectioned and whole bodied adult females in order to obtain good fixation and provide satisfactory penetration of the embedding media. All fixed specimens were infiltrated (up to seven days under 5 C) and embedded in hydroxyethyl metacrylate. Two-three m sections were s...

1. The concentration of Bromophenol Blue used as tracking dye in polyacrylamide-gel electrophoresis affected the resolution of rat neurophysins. 2. A final dye concentration of 1 p,g/ml in the tris-glycine running buffer was found to give the best results. 3. The presence oftwo major and one minor neurophysin(s) in the rat was confirmed. 4. The two major proteins were found to re-run as single ...

A laboratory computer controlled potentiometric titrator interfaced to a diode array spectrophotometer is described. The titrator consists of widely used, commercially available components; therefore, major attention is given to modes of interconnection and software implementation in data format and system control. Replicate potentiometric titrations of glycines gave a relative standard deviati...

A straightforward, sensitive, and quick spectrophotometric approach was created validated for the detection of Ciprofloxacin hydrochloride, Moxifloxacin Roxithromycin hydrochloride in pure form. These techniques were based upon fact that these antibiotics produced dark yellow ion pairs when combined with bromophenol blue. The binary complex universal buffer solution optimum pH values demonstrat...

Clonidine hydrochloride is an antihypertensive agent used for migraine prophylaxis, attention deficit hyperactivity disorder, menopausal flushing and Tourette syndrome. The quantity of the active substance in pharmaceutical preparations must be within specific limits, in agreement with the respective label claim. Therefore, the aim of this study was to establish the conditions for two spectroph...