Anion exchange membrane (AEM) electrolysis aims to combine the benefits of alkaline electrolysis, such as stability cheap catalyst and advantages proton-exchange systems, like ability operate at differential pressure, fast dynamic response, low energy losses, higher current density. However, today, AEM is limited by AEMs exhibiting insufficient ionic conductivity well lower activity stability. ...

Fluoride release from six light-activated restorative materials, including two resinmodified glass-ionomers, two composites, and two compomers, was evaluated and compared with one conventional acid-based glass-ionomer cement. The amount and rate of release varied among the tested materials. Both resin-modified glass-ionomers and the conventional acid-base glass-ionomer cements released more flu...

To evaluate the influence of adding different antibiotics to glass ionomer cement (GIC) on its surfaceroughness, water sorption, and solubility.

Modern fuel cell technologies use Nafion as the material of choice for proton exchange membrane (PEM) and binding (ionomer), used to assemble catalyst layers anode cathode. These applications demand high conductivity well other requirements. For example, PEM is expected block electrons, oxygen, hydrogen from penetrating diffusing while anode/cathode ionomer should allow hydrogen/oxygen move eas...

Glass ionomer cements are tooth-coloured materials that bond chemically to dental hard tissues and release fluoride for a relatively long period. They have therefore been suggested as the materials of choice for the restoration of carious primary teeth. However, the clinical performance of conventional and metal-reinforced glass ionomer restorations in primary molars is disappointing. And altho...

We have used a combination of analytical theory and molecular-dynamics simulations to investigate the effect of various material parameters on the structure and proton conductivity of Nafion-like ionomer membranes. This has included the effects of varying the length of the molecular side chains and their spacing along the polymer backbone, as well as membrane stretching, membrane poling by the ...

cementation of alloy-based restorations with traditional cements (e.g., glass-ionomer, resin-modified glass-ionomer, zinc phosphate, zinc polycarboxylate) to bonding of all ceramic restorations with resin based cements. With the increasing demand for high-end esthetic treatments for anterior teeth restorations, the need for a good esthetic cementation system comes into play in modern day dentis...

As the population ages, an increased prevalence of gingival recessions and root surfaces exposed to the oral environment has been reported. This in turn causes an increased risk for caries; it is estimated that the incidence of root caries in those older than 65 years of age is 23.7%. Published data support the use of glass ionomer as a restorative material that seems particularly suitable for ...

The dimensional changes of 4 types commercial luting cements after setting were examined in distilled water, using a developed thermal expansion testing apparatus. The measurements were carried out under three conditions: increasing temperature (from 37•Ž to 60•Ž), decreasing temperature (from 37•Ž to 10•Ž), and constant temperature (37•Ž). The results indicated that: (1) the zinc phosphate cem...

phosphate, polycarboxylate, zinc oxide-eugenol and glass-ionomer products and the characteristics of these cements have been examined by several investigators2-5). In our previous investigation6), a decrease in compressive and diametral tensile strength was observed following 12 months immersion in distilled water with zinc phosphate, polycarboxylate and glass ionomer cements for luting, contai...