in this research, the interaction of hexadecyl trimahyl ammonium bromide (htab) with enzyme ureasehas been investigated comprehensively at different experimental conditions such as ionic strength, proteinconcentration using ion selective membrane electrode of surfactants. the obtained binding isotherms frompotentiometnc studies have been analyzed by different theories such as wyman binding pote...

results low concentrations of agnps and short incubation times can have the maximum positive impact on the peroxidase activity, and in the present study the highest activity was seen at a concentration of 40 mg/l and two hours of incubation time. conclusions this study suggests that changes of enzyme activity can occur as a result of the effect of silver nanoparticles on enzyme conformation, in...

phosphatidate phosphohydrolase (pap) from cytosolic fraction of rat liver was purified to homogeneity having specific activity of 5.14 u/mg protein. an activity staining procedure was developed to determine molecular weight of the enzyme on polyacrylamide gel electrophoresis using ferguson plot. molecular weight (m.w.) of the active pap was 298 kda. sds-page analysis showed a m.w. of 47 kda for...

microcantilevers (mcls) are cost-effective and highly sensitive devices for biodetection. adsorption of specific analytes on the microcantilever surface causes the bending of mcl through changing of the surface characteristics. these new bioprobes designed in a way that one side of the microcantilever surface is coated with a selective receptor that absorbs particular molecules. after surface a...