Structural and Charge Transport Properties of Composites of Phosphate-Silicate Protonic Glass with Uranyl Hydroxy-Phosphate and Hydroxy-Arsenate Obtained by Mechano-Chemical Synthesis Undergoing Hydration Changes.

The introduction of the hydrogen economy, despite its obvious technological problems, creates a need for a significant number of niche-focused solutions, such as small-sized (10-100 W) fuel cells able to run on hydrogen of lesser purity than what is considered a standard in the case of PEMFCs. One of the solutions can be derived from the fact that an increase in the operational temperature of a cell significantly decreases its susceptibility to catalyst poisoning. Electrolytes suitable for the so-called medium temperature operational range of 120-400 °C, hence developed, are neither commercialized nor standardized.

Ionic Transport Properties of PO-SiO Glassy Protonic Composites Doped with Polymer and Inorganic Titanium-based Fillers.

This paper is focused on the determination of the physicochemical properties of a composite inorganic-organic modified membrane. The electrical conductivity of a family of glassy protonic electrolytes defined by the general formula (PO)(SiO), where x/y is 3/7 are studied by Alternating Current electrochemical impedance spectroscopy (AC EIS) method. The reference glass was doped with polymeric additives-poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA), and additionally with a titanium-oxide-based filler.

[Cardiovascular involvement in systemic lupus erythematosus: report of two cases].

Cardiac abnormalities has been receiving increased attention in patients with systemic lupus erythematosus (SLE). Cardiovascular system involvement has been found to have a substantial effect on mortality and morbidity in patients with SLE [1]. Recent diagnostic methods using echocardiography examination have allowed the delineation of cardiac manifestations such as myocarditis and myocardial dysfunction, valvular disease, pericardial disease or pulmonary hypertension.