001) and covariate-adjusted mortality (OR, 1.95; 95% CI, 1.30-2.92; P = .001). Overall, late RRT was associated with a longer duration of RRT and stay in hospital and greater dialysis dependence.
Conclusion: Timing of RRT, a potentially modifiable factor, might exert an
important influence on patient survival. However, this largely depended on its definition. Late RRT (days from admission) was associated with a longer duration of RRT, longer hospital stay, and higher dialysis dependence. (C) 2009 Elsevier Inc. All rights reserved.”
“PURPOSE: To compare the visual and refractive outcomes of laser in situ keratomileusis (LASIK) without iris registration, with static preablation iris registration, and with preablation iris registration-assisted intra-ablation
with dynamic rotational eye tracking.
SETTING: Refractive Surgery Services, Dr. Agarwal’s Eye Hospital, Chennai, India.
DESIGN: Randomized clinical trial.
METHODS: Ro-3306 Eyes with myopic astigmatism VX-809 manufacturer (cylinder >1.00 diopter [D]) had LASIK using the Technolas 217z100 platform. Preoperative and postoperative assessment included uncorrected and corrected .distance visual acuities, refraction, topographic analysis, and a routine LASIK workup. All cases were followed for 6 months.
RESULTS: The mean spherical equivalent (SE) was -6.1 D +/- 2.4 (SD) with no iris registration, -6.2 D +/- 2.3 D with static iris registration, and -6.5 +/- 2.2 a with dynamic iris registration (P = .4) preoperatively and -0.27 +/- 0.4 D, -0.12 +/- 0.4 D, and -0.02 +/- 0.35 D, respectively, 6 months postoperatively (P < .001). The mean cylindrical error was -2.05 +/- 0.7 D, -2.08 +/- 0.5 D, and -2.13 +/- 0.7 D, respectively, preoperatively (P = .6) and -0.37 +/- 0.2 D, -0.29 +/- 0.2 D, and -0.20 +/- 0.3
D, respectively, at 6 months (P < .001). Alpins analysis showed comparable target and surgically induced astigmatism between the 3 groups.; however, the difference vector, error angle, correction index, success index, and flattening index were best after dynamic iris registration see more (P < .001).
CONCLUSIONS: In myopic astigmatism, iris registration with dynamic rotational eye tracking gave better results than iris registration alone or no iris registration. The worst outcomes were in cases without iris registration.”
“Initial stage of oxidation of Si (100) surface by O(2) molecules was investigated in atomic scale by molecular dynamics (MD) simulation at 300 K and 1200 K without external constraint on the oxygen molecules. A reactive force field was used for the simulation to handle charge variation as well as breaking and forming of the chemical bonds associated with the oxidation reaction. Results of the present simulation are in good agreement with previous first principle calculations and experimental observations: the oxygen molecules spontaneously dissociated on the Si (100) surface and reacted with Si first layer without energy barrier.