67)Sr(0.33)Mn(1-x)Mo(x)O(3) is found to be 50% higher than that of La(0.67)Sr(0.33)MnO(3) without Mo doping. The significant enhancement for room temperature magnetoresistance could likely be attributed to the presence BI 2536 price of the cluster spin glass state caused by the Mo doping. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3152600]“
“Sugarcane combustion generates fine-grained particulate

that has the potential to be a respiratory health hazard because of its grain size and composition. In particular, conversion of amorphous silica to crystalline forms during burning may provide a source of toxic particles. In this study, we investigate and evaluate the toxicity of sugarcane ash and bagasse ash formed from commercial sugarcane burning. Experiments to determine the main physicochemical properties of the particles, known to modulate biological responses, were combined with cellular toxicity assays to gain insight into the potential reactions DAPT research buy that could occur at the particle-lung interface following inhalation. The specific surface area of the particles ranged from similar to 16 to 90 m(2) g(-1). The samples did not generate hydroxyl- or carbon-centered radicals in cell-free tests. However, all samples were able to ‘scavenge’ an external source of hydroxyl radicals, which may be indicative of defects on the particle surfaces that may

interfere with cellular processes. The bioavailable iron on the particle surfaces was low (2-3 mu mol m(-2)), indicating a low propensity for iron-catalyzed JQ1 purchase radical generation. The sample surfaces were all hydrophilic and slightly acidic, which may be due to the presence of oxygenated (functional) groups. The ability to cause oxidative stress and membrane rupture in red blood cells (hemolysis) was found to be low, indicating that the samples are not toxic by the mechanisms tested. Cytotoxicity of sugarcane ash was observed, by measuring lactate dehydrogenase release, after incubation of relatively high concentrations of ash with murine alveolar macrophage cells. All samples induced nitrogen oxide release (although only at very high concentrations) and reactive oxygen species generation

(although the bagasse samples were less potent than the sugarcane ash). However, the samples induced significantly lower cytotoxic effects and nitrogen oxide generation when compared with the positive control. (c) 2012 Wiley Periodicals, Inc. Environ Toxicol 29: 503-516, 2014.”
“We report investigations on the control of the magnetic domain nucleation and domain wall motion performed in glass covered amorphous microwires using the magneto-optical Kerr effect. The conditions of the acceleration, deceleration, and suppression of the domain nucleation have been determined. It was found that the combination of the dc electric current flowing along the wire and the phase shift in the nucleation coil permits to control the direction of the domain wall motion.