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Sökning: WFRF:(Viklund C) > (2015-2019)

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  • Beneš, C., et al. (författare)
  • Scaling limit of the loop-erased random walk Green’s function
  • 2015
  • Ingår i: Probability theory and related fields. - : Springer. - 0178-8051 .- 1432-2064.
  • Tidskriftsartikel (refereegranskat)abstract
    • We consider loop-erased random walk (LERW) running between two boundary points of a square grid approximation of a planar simply connected domain. The LERW Green’s function is the probability that the LERW passes through a given edge in the domain. We prove that this probability, multiplied by the inverse mesh size to the power 3/4, converges in the lattice size scaling limit to (a constant times) an explicit conformally covariant quantity which coincides with the (Formula presented.) Green’s function. The proof does not use SLE techniques and is based on a combinatorial identity which reduces the problem to obtaining sharp asymptotics for two quantities: the loop measure of random walk loops of odd winding number about a branch point near the marked edge and a “spinor” observable for random walk started from one of the vertices of the marked edge.
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  • Ericson, Petrea, 1966, et al. (författare)
  • Low Levels of Exhaled Surfactant Protein A Associated With BOS After Lung Transplantation
  • 2016
  • Ingår i: Transplantation Direct. - : Ovid Technologies (Wolters Kluwer Health). - 2373-8731. ; 2:9
  • Tidskriftsartikel (refereegranskat)abstract
    • Background. There is no clinically available marker for early detection or monitoring of chronic rejection in the form of bronchiolitis obliterans syndrome (BOS), the main long-term complication after lung transplantation. Sampling and analysis of particles in exhaled air is a valid, noninvasive method for monitoring surfactant protein A (SP-A) and albumin in the distal airways. Methods. We asked whether differences in composition of exhaled particles can be detected when comparing stable lung transplant recipients (LTRs) (n = 26) with LTRs who develop BOS (n = 7). A comparison between LTRs and a matching group of healthy controls (n = 33) was also conducted. Using a system developed in-house, particles were collected from exhaled air by the principal of inertial impaction before chemical analysis by immunoassays. Results. Surfactant protein A in exhaled particles and the SP-A/albumin ratio were lower (P = 0.002 and P = 0.0001 respectively) in the BOS group compared to the BOS-free group. LTRs exhaled higher amount of particles (P < 0.0001) and had lower albumin content (P < 0.0001) than healthy controls. Conclusions. We conclude that low levels of SP-A in exhaled particles are associated with increased risk of BOS in LTRs. The possibility that this noninvasive method can be used to predict BOS onset deserves further study with prospective and longitudinal approaches.
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