the objectives of this investigation are the studies on the effect of copper ion on photolytic degradation of ethylenediaminetertraaceticacid (edta), the effect of edta on electrolytic recovery of copper as well as the introduction of a novel combined photolytic and electrolytic cell system for simultaneous recovery of copper and the degradation of edta.in this experimental study, a photolytic ...

A novel stability-indicating reverse-phase high-performance liquid chromatographic (HPLC) method has been developed for quantitative determination of Fosamprenavir Calcium, HIV-1 protease inhibitor. Chromatographic separation was achieved using an YMC Pack ODS AQ (150 mm × 4.6 mm × 3.0 μm) HPLC column in isocratic mode employing 0.05 M Potassium dihydrogen orthophosphate monohydrate (pH 6.8) bu...

A novel stability-indicating reversed-phase high-performance liquid chromatographic (HPLC) method has been developed for the quantitative determination of darunavir ethanolate, an HIV-1 protease inhibitor. The chromatographic separation was achieved using an X-Bridge C18 (150 × 4.6 mm × 3.5 µm) HPLC column in isocratic mode employing 0.01M ammonium formate (pH.3.0) buffer and acetonitrile in th...

Engine oils undergo oxidative degradation and wears out during service. Hence it is important to characterize ageing of engine oils at different simulated conditions to evaluate the performance of existing oils and also design new formulations. This work focuses on characterizing the thermo-oxidative degradation of synthetic and semi-synthetic engine oils aged at 120, 149 and 200 °C. Apparent a...

BACKGROUND To understand the degradation behavior of diacerein and to develop a simple, rapid, sensitive, and validated RP-HPLC method for the determination of diacerein, in the presence of its degradation products. MATERIALS AND METHODS An accurate, sensitive, precise, rapid, and isocratic reversed-phase high-performance liquid chromatography (RP-HPLC) method, equipped with a photo-diode arr...

Light and temperature have considerable effect on the degradation of piroxicam in aqueous solutions. The pH and acetate buffer ions also affect the degradation process. The apparent first-order rate constants for the photochemical and thermal degradation of piroxicam have been determined as 2.04-10.01 and 0.86-3.06×10(-3) min(-1), respectively. The first-order plots for the degradation of pirox...

Ionomers are generally described by copolymers having either acrylic or methacylic acid as one component and the other component is mostly either ethylene or styrene. The objective of this research was to study the thermal behaviour and stability of ionomers of styrene with some alkali metal acrylates. These materials have been synthesized by neutralization of the respective copoly...

A robust, sensitive, and stability-indicating rapid resolution liquid chromatography method for the simultaneous determination of process impurities and degradation products of lercanidipine hydrochloride in pharmaceutical dosage form was developed and validated. The chromatographic separation was performed on the Zorbax SB C18 [(50 × 4.6) mm] 1.8 μm column, using gradient elution of a potassiu...

Laminate composites which are widely used in the aeronautical industry, are usually subjected to frequency variation of environmental temperature and excessive humidity in the in-service environment. The thermal fatigue and moisture absorption in composites may induce material degradation. There is a demand to investigate the coupling damages mechanism and characterize the degradation evolution...

Abstract The most common preservation process for chili peppers is drying, which inevitably causes oxidative degradation of thermolabile molecules. aim this research was to evaluate the potential protective effect exerted by an active ingredient based on grape seed oil, pepper fruits. Grapeseed oil rich in antioxidant compounds and applied pepper’s surface form a sol–gel product, before fruit t...