Correlation between Nafion Morphology in Various Dispersion Liquids and Properties of the Cast Membranes.

Nafion is a perfluorosulfonic acid polymer that is most commonly used in proton-exchange membrane fuel cells. The processes of pretreatment and formation of such membranes strongly affect their properties. In this work, dispersions of Nafion in various ionic forms and dispersing liquids (ethylene glycol, -dimethylformamide, -methyl-2-pyrrolidone and isopropyl alcohol-water mixtures in different ratios) were obtained and studied.

Telemedicine-based system for quality management and peer review in radiology.

Objectives: Quality assurance is the key component of modern radiology. A telemedicine-based quality assurance system helps to overcome the "scoring" approach and makes the quality control more accessible and objective.

Methods: A concept for quality assurance in radiology is developed.