4. While both x = 0.5 and x = 0.6 compounds exhibit metal-insulator transition. Furthermore, large low field magnetoresistance (MR) and hysteresis appears only in the MR (H) curve of x = 0.5 sample. These results are discussed in terms of the charge localization caused by the lattice distortion due to the character of the 6s(2) lone pair of Bi3+ ions. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3506683]“
“Objective. The aim of this study was to compare the leakage of root canal fillings of gutta-percha or Resilon cones in association with AH Plus or Epiphany sealer.
Study
design. Four groups of premolars (n = 64) were instrumented to size 45/.04 ProFile and filled with laterally compacted gutta-percha cones or Resilon
Cl-amidine cones in association with AH Plus or Epiphany sealer. The specimens were stored for 2 weeks at 37 C and 100% humidity. After that, leakage was measured using the fluid filtration method and determined as mu L/min.10 psi.
Results. Homogeneity of variance and multiple comparisons tests were performed and indicated that root fillings with the combination of gutta-percha cones and AH Plus sealer showed lower leakage values (P < .05) than the other groups.
Conclusion. Considering the experimental conditions and the results obtained, it was concluded that fillings made with gutta-percha cones in combination with AH Plus sealer had the best performance. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2010;109:e131-e135)”
“Chemical modification was performed PD173074 mouse for macroporous crosslinked chloromethylated polystyrene. The obtained HJ-K01 resin was used to remove phenol from aqueous solution, and its adsorption behaviors selleck screening library for phenol were compared with commercial Amberlite XAD-4. The results indicate that methylamino groups were successfully uploaded onto the surface of the HJ-K01 resin and the adsorption capacity of phenol onto the
HJ-K01 resin was much larger than that onto XAD-4. Furthermore, the original phenol solution was suitable for the adsorption, the adsorption isotherms could be fitted by the Freundlich model, and its kinetic curves could be characterized by a pseudo-second-order rate equation. The fixed-bed column adsorption demonstrated that the HJ-K01 resin was an excellent resin for the removal of phenol. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 119: 1435-1442, 2011″
“Crystalline nanowires particularly metallic nanowires with twin boundaries have higher strength than those without. Achieving the higher strength requires controllable introduction of twin boundaries, which is impossible at the present. Turning the impossibility to a possibility, this paper proposes a mechanism of controllably introducing twin boundaries into crystalline nanowires by design; and demonstrates its feasibility using molecular dynamics simulations. This mechanism relies on the combination of mechanical torsion and local melting (and subsequent solidification).