Novel synthesis of cerium oxide nanoparticles for free radical scavenging.

Aims: The aim of this article is to present a novel synthetic route to form CeO(2) nanoparticles that protects against the detrimental influence of oxidative stress in mammalian cells.

Methods: The noncytotoxic surfactant lecithin was used to synthesize CeO(2) nanoparticles and the products were colloidally stabilized in a biocompatible tri-sodium citrate buffer. These nanoparticles were delivered into murine insulinoma betaTC-tet cells, and intracellular free radical concentrations responding to exposure to hydroquinone were measured in a variety of extracellular CeO(2) concentrations.

Non-invasive evaluation of alginate/poly-l-lysine/alginate microcapsules by magnetic resonance microscopy.

In this report, we present data to demonstrate the utility of (1)H MR microscopy to non-invasively examine alginate/poly-l-lysine/alginate (APA) microcapsules. Specifically, high-resolution images were used to visualize and quantify the poly-l-lysine (PLL) layer, and monitor temporal changes in the alginate gel microstructure during a month long in vitro culture. The thickness of the alginate/PLL layer was quantified to be 40.