a new potassium persulfate redox system has been investigated for the graft polymerization of vinyl monomers. in this study potassium persulfate system was used for initiation the polymerization. graft polymerization of acrylonitrile (an) onto starch (sta) was carried out in aqueous solution using potassium persulfate (i) redox system. it was found that the percentage of grafting and rate of gr...

Spent coffee grounds (SCGs) are a waste product with no relevant commercial value. However, SCGs rich in extractable compounds biological activity. To add value to this byproduct, water and aqueous solutions of cholinium-based ionic liquids (ILs) were studied extract caffeine from SCGs. In general, all IL lead higher extraction efficiencies than pure water, cholinium bicarbonate being the most ...

In this work we obtained a polymer-metal complex by mixing aqueous solution of copper(II) acetate with PVA at certain ratio, pH the and temperature. The composition compound was determined potentiometric conductometric titration. possibility formation proved calculating thermodynamic characteristics. stability constant calculated on basis modified Bjerrum’s method. metal-polymer synthesized in ...

Atorvastatin, a highly lipophilic anti-hyperlipidemic drug, has poor oral bioavailability (14%) due to hepatic first pass effect. The present study aimed at developing an optimal oral nanoemulsion formulation containing an atorvastatin using different proportions of oil and surfactant systems for enhancing its oral bioavailability. Pseudoternary phase diagrams were constructed by aqueous titrat...

Petroleum ether (60 degrees-80 degrees C), chloroform, acetone, ethanol, aqueous and crude hot water extracts of the whole plant of C. dactylon and the two fractions of aqueous extract were tested for antihyperglycaemic activity in glucose overloaded hyperglycemic rats and in alloxan induced diabetic model at two-dose levels, 200 and 400 mg/kg (po) respectively. The aqueous extract of C. dactyl...