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Sökning: LAR1:lu > (2005-2009) > Tidskriftsartikel > Engelska > Uppsala universitet

  • Resultat 871-873 av 873
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871.
  • Ögren, Mats, et al. (författare)
  • High incidence of vascular reconstructions in socioeconomically deprived areas of an urban Swedish population
  • 2007
  • Ingår i: British Journal of Surgery. - : Oxford University Press (OUP). - 0007-1323 .- 1365-2168. ; 94:2, s. 183-188
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: In Malmö approximately 250,000 citizens live in 17 administrative areas with substantial socioeconomic differences. At the single centre for arterial reconstruction, Malmö University Hospital, all procedures are registered prospectively. METHODS: Between 1987 and 2002, 1832 Malmö citizens underwent reconstruction for peripheral arterial disease, either intermittent claudication (IC) or critical leg ischaemia (CLI). A socioeconomic score based on migration rate, percentage of residents with foreign citizenship/residents with foreign background, social welfare support dependency and unemployment rate has previously been developed and validated for each area. The relationship between socioeconomic score and area-specific standardized morbidity ratios (SMRs) after vascular reconstruction was analysed by population-weighted linear regression. RESULTS: The mean incidence of vascular reconstruction was 76 (range 27-106) per 100,000 person years. Age- and sex-adjusted SMRs ranged from 0.57 to 1.39. A strong correlation between SMR and socioeconomic score was found overall (R=0.63; P=0.007), in men (R=0.63; P=0.007) and in women (R=0.58; P=0.039), and for IC (R=0.58; P=0.015) and CLI (R=0.58; P=0.015). CONCLUSION: In an urban population with similar access to medical care, vascular reconstruction rates varied substantially. High-rate areas were characterized by inferior socioeconomic circumstances and a higher prevalence of smoking, hypertension and obesity.
  •  
872.
  • Öhrn, Anders, et al. (författare)
  • p-Benzoquinone in aqueous solution: Stark shifts in spectra, asymmetry in solvent structure
  • 2007
  • Ingår i: Physical Chemistry Chemical Physics. - : Royal Society of Chemistry (RSC). - 1463-9084 .- 1463-9076. ; 9:4, s. 470-480
  • Tidskriftsartikel (refereegranskat)abstract
    • Results from a simulation of p-benzoquinone (PBQ) in water is presented. An explicit solvent representation is used together with a multiconfigurational ab initio quantum chemical method. The electronic n -> pi* transitions are studied in aqueous solution and the two such transitions are both blue-shifted but to different degree. Both non-equilibrium and many-body effects are found to have decisive influence on the solvation: despite stronger hydrogen bonding between solute and solvent in an excited state than in the ground state, there is a blue-shift, and the solvent structure around the non-polar PBQ is asymmetric, which is argued to come from special many-body effects. The unusual result of strengthened hydrogen bonds in the excited state that follows from an excitation of a non-bonding electron on a proton acceptor, is explained by the near-linear Stark shift that is present in the transition.
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873.
  • Öhrwall, Gunnar, et al. (författare)
  • The electronic structure of free water clusters probed by Auger electron spectroscopy
  • 2005
  • Ingår i: Journal of Chemical Physics. - : AIP Publishing. - 0021-9606 .- 1089-7690. ; 123, s. 054310-
  • Tidskriftsartikel (refereegranskat)abstract
    • (H2O)(N) clusters generated in a supersonic expansion source with N similar to 1000 were core ionized by synchrotron radiation, giving rise to core-level photoelectron and Auger electron spectra (AES), free from charging effects. The AES is interpreted as being intermediate between the molecular and solid water spectra showing broadened bands as well as a significant shoulder at high kinetic energy. Qualitative considerations as well as ab initio calculations explain this shoulder to be due to delocalized final states in which the two valence holes are mostly located at different water molecules. The ab initio calculations show that valence hole configurations with both valence holes at the core-ionized water molecule are admixed to these final states and give rise to their intensity in the AES. Density-functional investigations of model systems for the doubly ionized final states-the water dimer and a 20-molecule water cluster-were performed to analyze the localization of the two valence holes in the electronic ground states. Whereas these holes are preferentially located at the same water molecule in the dimer, they are delocalized in the cluster showing a preference of the holes for surface molecules. The calculated double-ionization potential of the cluster (22.1 eV) is in reasonable agreement with the low-energy limit of the delocalized hole shoulder in the AES.
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  • Resultat 871-873 av 873
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