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Träfflista för sökning "LAR1:gu ;spr:eng;srt2:(2000-2009)"

Sökning: LAR1:gu > Engelska > (2000-2009)

  • Resultat 1-10 av 31682
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1.
  • 2-(p-Hydroxybenzyl)indoles - Side Products Formed Upon Cleavage of Indole Derivatives from Carboxylated Wang Polymer - an NMR Study.
  • 2003
  • Ingår i: molecules. ; 8:10, s. 728-734
  • Tidskriftsartikel (refereegranskat)abstract
    • Treatment of carboxylated Wang polymer attached to a 2-unsubstituted indole derivative with a trifluoroacetic acid based mixture resulted in a side reaction: p-hydroxybenzylation at the 2-position of the indole ring. The structure of the resulting N-3- aminopropyl)-N-benzyl-4-[2-(4-hydroxybenzyl)-1H-indol-3-yl]-butyramide trifluoroacetate was ascertained by a full assignment of its 1H- and 13C-NMR spectra. The side reaction could be suppressed by the use of 1,2-ethanedithiol in high concentrations (16 %).
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5.
  • A. Nojima,, et al. (författare)
  • Calculational aspects of electron-phonon coupling at surfaces
  • 2008
  • Ingår i: J. Phys: Condens. Matter. - : IOP Publishing. - 1361-648X .- 0953-8984. ; 20
  • Tidskriftsartikel (refereegranskat)abstract
    • We study the validity of two frequently used approximations in calculations of electron–phonon coupling at surfaces. The rigid-ion approximation is a standard approximation used for the bulk metals. On the basis of density functional theory calculations, we find that for Be this approximation is as valid for surface atoms as for bulk atoms. In addition, the slab method for calculations of a phonon induced surface state lifetime is examined. The convergence of the electron–phonon matrix element with respect to the thickness of the slab is studied for several systems. When the number of slab layers is increased, the net effect of decreasing overlap and increasing number of final states depends strongly on the decay length of the surface state wavefunction and the band structure.
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6.
  • A. Nojima,, et al. (författare)
  • Model Eliashberg function for surface states
  • 2008
  • Ingår i: Applied Surface Science. ; 254:23
  • Tidskriftsartikel (refereegranskat)abstract
    • We present a simplified procedure for the analysis of the phonon-induced lifetimes of surface states. The model includes information about the electron and phonon structure and is thus more reliable than procedures based on phonon Debye models. We apply the model to calculate the lifetime broadening of Cu(1 1 1) and Al(0 0 1) surface states. The obtained Eliashberg functions and lifetimes are in reasonable agreement with previous detailed studies.
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7.
  • Aaberge, Rolf, et al. (författare)
  • Evaluation of an In-work Tax Credit Reform in Sweden: Effects on Labor Supply and Welfare Participation of Single Mothers
  • 2008
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • The purpose of this paper is to evaluate a recent Swedish in-work tax credit reform where we pay particular attention to labor market exclusion; i.e. individuals in as well as outside the labor force are included in the analysis. To highlight the importance of the joint effects from the tax and the benefit systems it appears particular relevant to analyze the labor supply behavior of single mothers. To this end, we estimate a structural microeconometric model of labor supply and welfare participation. The model accounts for heterogeneity in consumption-leisure preferences as well as for constraints in job opportunities. The results of the evaluation show that the reform generates welfare-gains for virtually every single mother, and moreover benefits low-income households. Finally, due to increased labor supply and decline in welfare participation we find that this reform is almost self-financing.
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9.
  • Aaro Jonsson, Catherine, 1963-, et al. (författare)
  • Long-term cognitive outcome after neurosurgically treated childhood traumatic brain injury
  • 2009
  • Ingår i: Brain Injury. - : Taylor & Francis. - 0269-9052 .- 1362-301X. ; 23:13-14, s. 1008-1016
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To explore the cognitive long term outcome of two cohorts of patients neurosurgically treated for childhood traumatic brain injury (CTBI), either in 1987-1991 according to an older concept, or 1997-2001 with a stronger emphasis on volume targeted interventions. Research design and methods: Participants in the two cohorts were subject to an extensive neuropsychological assessment, 13.2 and 6.1 years post injury, respectively. In a between group design, assessment results of the two cohorts, n 18 and n 23, were compared to each other and to controls. Data were analyzed with multivariate analyses of variance. Results: Long-term cognitive deficits for both groups of similar magnitude and character were observed in both groups. Abilities were especially low regarding executive and memory function and verbal IQ. The cognitive results are discussed in terms of  vulnerability of verbal functions and decreased executive control over memory-functions. Conclusions: There is a definite need for long term follow up of cognitive deficits after neurosurgically treated CTBI, also with the newer neurosurgical concept. Verbal learning and the executive control over memory functions should be addressed with interventions aimed at restoration, coping and compensation.
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10.
  • Aaro Jonsson, Catherine, 1963-, et al. (författare)
  • Neuropsychological progress during 14 years after severe traumatic brain injury in childhood and adolescence
  • 2004
  • Ingår i: Brain Inj. - : Informa UK Limited. - 0269-9052 .- 1362-301X. ; 18:9, s. 921-34
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: To investigate the impact of time since injury on neuropsychological and psychosocial outcome after serious TBI in childhood or adolescence. METHODS: The subjects were eight patients with serious TBI sustained at a mean age of 14 years who had been assessed neuropsychologically at 1, 7 and 14 years after TBI. A retrospective longitudinal design was chosen to describe the development in six neuropsychological domains on the basis of the assessments. Psychosocial data were gathered from clinical knowledge and a semi-structured interview 14 years after TBI. RESULTS: Performance of verbal IQ shows a declining trend over the three assessments, that the performance of attention and working memory is low and that verbal learning is the cognitive domain which exhibits the largest impairments. The main psychosocial result is that three of the eight subjects went from a school situation with no adjustments to adult life with early retirement. CONCLUSIONS: Time since insult is an important factor when assessing outcome after TBI in childhood and adolescence and that assessment of final outcome should not be done before adulthood.
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