We show that bias polarity can greatly accelerate device failure in such GST-based PCM devices and, through extensive transmission electron microscopy-based failure analysis, trace these effects to a two-stage elemental segregation process. Segregation is initially driven by bias across the molten region of the cell and is then greatly enhanced during the crystallization process at lower temperatures. These results
have implications for the design of pulses and PCM cells for maximum endurance, the use of reverse polarity for extending endurance, the requirements for uni- or bi-polar access devices, the need for materials Epigenetics inhibitor science on active rather than initial stoichiometries, and the need to evaluate new PCM materials under both bias polarities. (C) 2011 American Institute of Physics. [doi:10.1063/1.3626047]“
“An interfacial polymerization reaction was used to coat a
functional paper with a polyamide film containing volatile essential oil (VEO) composites. The components of the VEO extract were linalool, alpha-terpineol, carveol, carvone, perillaldehyde and valencene. Preparing the polyamide film by an interfacial polymerization reaction eliminated the need for microcapsule preparation and coating with a binder, which are typically click here used in functional paper preparation. The interfacial polymerization involved immersing a filter paper impregnated with an oil-in-water emulsion of ethylenediamine and VEO in a cyclohexane solution of terephthaloyl chloride. This successfully fixed the polyamide film containing the VEO on the paper surface. Release of VEO fragrance from the paper surface was studied, and the paper showed sustained release of the VEO. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012″
“Purpose: The aim of this study is to evaluate the relationship between timing of renal replacement therapy (RRT) in severe acute kidney injury and clinical outcomes.
Methods: This was a prospective multicenter observational
www.selleckchem.com/products/cl-amidine.html study conducted at 54 intensive care units (ICUs) in 23 countries enrolling 1238 patients.
Results: Timing of RRT was stratified into “”early”" and “”late”" by median urea and creatinine at the time RRT was started. Timing was also categorized temporally from ICU admission into early (<2 days), delayed (2-5 days), and late (>5 days). Renal replacement therapy timing by serum urea showed no significant difference in crude (63.4% for urea <= 24.2 mmol/L vs 61.4% for urea >24.2 mmol/L; odds ratio [OR], 0.92; 95% confidence interval [CI], 0.73-1.15; P = .48) or covariate-adjusted mortality (OR, 1.25; 95% CI, 0.91-1.70; P = .16). When stratified by creatinine, late RRT was associated with lower crude (53.4% for creatinine >309 mu mol/L vs 71.4% for creatinine <= 309 mu mol/L; OR, 0.46; 95% CI, 0.36-0.58; P < .0001) and covariate-adjusted mortality (OR, 0.51; 95% CI, 0.37-0.69; P < .001).However, for timing relative to ICU admission, late RRT was associated with greater crude (72.8% vs 62.