The results revealed that fatigue was not limited to the near-electrode regions, but throughout the ceramic samples in the thickness direction. The electric field inhomogeneity in ferroelectric ceramics during bipolar switching was proposed to be responsible for ferroelectric fatigue and the fatigue profile through phase decomposition. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.”
“Objectives – To evaluate the impact of maternal age and prenatal diagnosis on the prevalence of Down’s syndrome at birth in R406 clinical trial French population sample.\n\nPatients and methods. – Data concerning Down’s syndrome

from 1978 to 2005 were obtained from the REMERA registry of congenital malformations. The population surveyed was approximately 10% of French births. We studied total prevalence, live-birth prevalence

and the prevalence of pregnancy termination after prenatal diagnosis.\n\nResults. – Mean maternal age has risen from 26 to 30 years over the study period. Total prevalence of Down’s syndrome has increased from 14 per 10,000 in 1978 to 23 per 10,000 live-births in 2005. Termination of pregnancy after THZ1 purchase prenatal diagnosis of Down’s syndrome gradually increased reaching 78% in 2005. Live-birth prevalence decreased from 14 per 10,000 in 1978 to 5.1 per 10,000 in 2005.\n\nConclusion. – This work shows the importance of continuing the epidemiological survey of Down’s syndrome in France, especially because of the modification in population ageing as well in prenatal screening policies for Down’s selleckchem syndrome. (C) 2010 Elsevier Masson SAS. All rights reserved.”
“Effects of UV radiation and associated elevated temperature on properties of polymeric composites have been well documented, limiting the scope of their usage in outdoor applications. In order to improve on this limitation, current study focused on incorporating nanoparticles into epoxy polymer composites and delay onset of deleterious effects of UV radiation by partially curing these samples. Samples were fabricated and cured to

80% conversion (partially cured) based on isothermal cure kinetic studies. Influence of I, 2 and 3 wt. % loading of montmorillonite nanoclay on the cure behavior and development of physical properties of these composites were evaluated. Results of the study revealed that for optimization of modified epoxy composite properties a different curing cycle was necessary due to interaction of different amounts of nanoclay and epoxy molecules. Fabricated samples infused with 1, 2 and 3 wt. % montmorillonite nanoclay were exposed to 2500 h of continuous UV radiation, where effects of UV radiation on viscoelastic and thermal properties were evaluated and compared with identical set of fabricated samples using manufacturers’ recommended cycle (fully cured).