SIZE AND DENSITY OF POLYSTYRENE PARTICLES MEASURED BY ULTRACENTRIFUGATION

Size and density of polystyrene particles measure by ultracentrifugation.

A material currently in use (1) for calibration of electron magnification is a polystyrene latex, characterized by a remarkably high degree of particle uniformity with respect to size and shape. The particles, spherical in shape and stable in water suspension, are in a range suitable not only for electron micrography but for independent determinations of size by sedimentation velocity, viscosit...

Synthesis of Silica/Polystyrene Nanocomposite Particles by Miniemulsion Polymerization

Miniemulsion polymerization is one of heterogeneous polymerization method that can be effectively used to synthesis of various novel organic-inorganic nanocomposite particles. This method can provide opportunity of good incorporation between the polymer and inorganic phases in the formed submicrometer-sized particles. In this article, we report preparation polystyrene/silica nanocomposite p...

High-density lipoprotein subfractions as measured by differential polyanionic precipitation and rate zonal ultracentrifugation.

Recent interest in the putative protective role of high-density lipoprotein (HDL) and its subfractions against atherosclerosis has highlighted the need for a rapid, simple subfractionation procedure. Here we compared HDL subfractionation by two recently developed polyanionic-precipitation methods with the values obtained by rate zonal ultracentrifugation. A similar result for total HDL choleste...

synthesis of silica/polystyrene nanocomposite particles by miniemulsion polymerization

synthesis of amido alkylnaphthols using nano-magnetic particles and surfactants

we used dbsa and nano-magnetic for the synthesis of amido alkylnaphtols.