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Sökning: WFRF:(Jansson Håkan)

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  • Jansson, Håkan, et al. (författare)
  • Genetic relationships among species of hagfish revealed by protein electrophoresis
  • 1995
  • Ingår i: Journal of Fish Biology. - : Wiley. - 0022-1112 .- 1095-8649. ; 47:4, s. 599-608
  • Tidskriftsartikel (refereegranskat)abstract
    • Hagfish species of the genera Myxine, Eptatretus and Pnramyxine were analysed for genetic variation by allozyme electrophoresis and isoelectric focusing of general proteins. Large genetic differences were observed between samples of supposed conspecifics of Myxine circifrons from off the Californian coast, and also within one sample of Paramyxine sp. from Sagami Bay, Japan. The results are convincing evidence of the existence of additional sympatric species in these two areas. In general, the highest genetic identities were found between species within the subfamilies Myxininae and Eptatretinae. Within Eptatretinae, the Japanese species Eptatietus burgeri was genetically more similar to Japanese species of Paramyxine than to American species of Eptatretus. Thus, our data indicate that the generic status of Paramyxine should be reconsidered. (C) 1995 The Fisheries Society of the British Isles.
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  • Jansson, Jan-Håkan, et al. (författare)
  • Snus (Swedish smokeless tobacco) use and risk of stroke: pooled analyses of incidence and survival
  • 2014
  • Ingår i: Journal of Internal Medicine. - : Wiley. - 1365-2796 .- 0954-6820. ; 276:1, s. 87-95
  • Tidskriftsartikel (refereegranskat)abstract
    • Background. Snus is a moist smokeless tobacco product with high nicotine content. Its use has a short-term effect on the cardiovascular system, but the relationship between snus use and stroke is unclear. Objective. The aim of this study was to assess the associations between use of snus and incidence of and survival after stroke, both overall and according to subtypes. Methods. Pooled analyses of eight Swedish prospective cohort studies were conducted, including 130 485 men who never smoked. We estimated hazard ratios (HRs) with 95% confidence intervals (CIs) of incidence and death after diagnosis using Cox proportional hazard regression models and case fatality and survival using logistic regression and Kaplan-Meier methods, respectively. Results. No associations were observed between the use of snus and the risk of overall stroke (HR 1.04, 95% CI 0.92-1.17) or of any of the stroke subtypes. The odds ratio (OR) of 28-day case fatality was 1.42 (95% CI 0.99-2.04) amongst users of snus who had experienced a stroke, and the HR of death during the follow-up period was 1.32 (95% CI 1.08-1.61). Conclusion. Use of snus was not associated with the risk of stroke. Hence, nicotine is unlikely to contribute importantly to the pathophysiology of stroke. However, case fatality was increased in snus users, compared with nonusers, but further studies are needed to determine any possible causal mechanisms.
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  • Lindroos, Mats, et al. (författare)
  • The European Spallation Source
  • 2011
  • Ingår i: Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. - : Elsevier BV. - 0168-583X .- 1872-9584. ; 269:24, s. 3258-3260
  • Tidskriftsartikel (refereegranskat)abstract
    • In 2003 the joint European effort to design a European Spallation Source (ESS) resulted in a set of reports, and in May 2009 Lund was agreed to be the ESS site. The ESS Scandinavia office has since then worked on setting all the necessary legal and organizational matters in place so that the Design Update and construction can be started in January 2011, in collaboration with European partners. The Design Update phase is expected to end in 2012, to be followed by a construction phase, with first neutrons expected in 2018-2019. (C) 2011 Elsevier By. All rights reserved.
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