Université de Sherbrooke

About: Université de Sherbrooke is a education organization based out in Sherbrooke, Quebec, Canada. It is known for research contribution in the topics: Population & Receptor. The organization has 14922 authors who have published 28783 publications receiving 792511 citations. The organization is also known as: Universite de Sherbrooke & Sherbrooke University.

Direct measurement of the upper critical field in cuprate superconductors

Abstract: The point at which a magnetic field kills superconductivity in the cuprates has been difficult to measure. Grissonnanche et al. use thermal conductivity measurements to reliably determine this field and find that it drops suddenly below some critical doping, suggesting the onset of a new competing phase.

Release of interleukin-8, interleukin-6, and colony-stimulating factors by upper airway epithelial cells: implications for cystic fibrosis.

Abstract: Cystic fibrosis (CF) is characterized by a dramatic neutrophil recruitment and repeated Pseudomonas infections in the lungs. To evaluate cytokine releasability by airway epithelial cells in the context of CF, we studied primary nasal epithelial cells isolated from the upper airways and continuous epithelial cell lines from normal and CF subjects. Relatively low levels of interleukin (IL)-8, IL-6, and granulocyte/macrophage colony-stimulating factor (GM-CSF) were produced spontaneously by primary epithelial cells (< 50 pg/106 cells) and higher levels of colony-stimulating factor-1 (CSF-1) (1 to 2 ng/106 cells). Cells were stimulated with substances that are likely to be present in the inflamed lungs of CF patients—namely, the proinflammatory monokines IL-1 and tumor necrosis factor-α (TNFα) as well as neutrophil elastase and bacterial products from Pseudomonas (mucoid exopolysaccharide [MEP] and rhamnolipids). Both IL-1 and TNFα induced a dose-dependent release of IL-6 (5 to 10 ng/106 cells) and GM-CSF (2 ...

Orbital-selective Mott transition out of band degeneracy lifting.

Abstract: We outline a general mechanism for orbital-selective Mott transition, the coexistence of both itinerant and localized conduction electrons, and show how it can take place in a wide range of realistic situations, even for bands of identical width and correlation, provided a crystal field splits the energy levels in manifolds with different degeneracies and the exchange coupling is large enough to reduce orbital fluctuations. The mechanism relies on the different kinetic energy in manifolds with different degeneracy. This phase has Curie-Weiss susceptibility and non-Fermi-liquid behavior, which disappear at a critical doping, all of which is reminiscent of the physics of the pnictides.