The interaction between felodipine and bovine serum protein was studied, the optimal experimental conditions were selected, fluorescence quenching mechanism discussed. filodipine determined by UV spectrophotometry, selected control variable method. of in system explored spectrophotometry. intensity most obvious under buffer solution pH 7.4, concentration 8.0*10 -4 mol/L, reaction time 30min 25°...

In this study, a quinoline-4-carboxylic acid derivative was synthesized through Pfitzinger reaction. reaction, isatin is modified via its reaction with ketone and refluxed for 24 h to obtain acid. The presence of carboxylic group identified by Fourier Transform Infrared (FTIR) spectroscopy ultraviolet–visible (UV-Vis) spectrophotometry. results showed that the absorption peaks C=O O–H stretchin...

Chitin is a structural polysaccharide that can be found in the cell wall of fungi and in the exoskeleton of most invertebrates, of which crustaceans are currently the major source of chitin for the industry. This polysaccharide is similar to cellulose, both in function, chemical structure and abundance; chitin is likely to be one of the most abundant natural macromolecules in the biosphere. Bes...

A new sensitive, simple, rapid and precise method for simultaneous estimation of paracetamol and aceclofenac in combined tablet dosage form has been developed. The method is based on ratio derivative spectrophotometry. The amplitude in first derivative of the ratio spectra at 256 nm and 268 nm (minima) were selected to determine paracetamol and aceclofenac in combined formulation. The method sh...

Coffee is one of the plantation commodities that has a fairly high economic value compared to other crops and plays an important role as source foreign exchange for country. Caffeine belongs methylxanthine group compounds. Methylxanthine naturally occurring compound xanthine derivative which alkaloid To determine difference in caffeine content between coffee beans grounds circulating supermarke...

The development of novel chemical approaches for the fabrication gold nanostructures with localized surface plasmon resonance (LSPR) falling in near-infrared (NIR) region is one challenging topic nanomaterials science. Due to their optical and photothermal properties triggered by light excitation therapeutic window (λmax = 650–1300 nm), gold-based are appealing candidates anticancer nanomedicin...