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Träfflista för sökning "WFRF:(Dominguez N) srt2:(2002-2004)"

Sökning: WFRF:(Dominguez N) > (2002-2004)

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1.
  • Aspholm-Hurtig, Marina, et al. (författare)
  • Functional adaptation of BabA, the H. pylori ABO blood group antigen binding adhesin.
  • 2004
  • Ingår i: Science (New York, N.Y.). - : American Association for the Advancement of Science (AAAS). - 1095-9203 .- 0036-8075. ; 305:5683, s. 519-22
  • Tidskriftsartikel (refereegranskat)abstract
    • Adherence by Helicobacter pylori increases the risk of gastric disease. Here, we report that more than 95% of strains that bind fucosylated blood group antigen bind A, B, and O antigens (generalists), whereas 60% of adherent South American Amerindian strains bind blood group O antigens best (specialists). This specialization coincides with the unique predominance of blood group O in these Amerindians. Strains differed about 1500-fold in binding affinities, and diversifying selection was evident in babA sequences. We propose that cycles of selection for increased and decreased bacterial adherence contribute to babA diversity and that these cycles have led to gradual replacement of generalist binding by specialist binding in blood group O-dominant human populations.
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  • Stolte, W. C., et al. (författare)
  • Photofragmentation dynamics of core-excited water by anion-yield spectroscopy
  • 2003
  • Ingår i: Phys. Rev. A. ; 68, s. 022701-
  • Tidskriftsartikel (refereegranskat)abstract
    • Partial-anion and- cation yields from H2O are presented for photon energies near the oxygen K edge. The O- yield exhibits a feature above threshold attributed to doubly excited states, in contrast to the H- and cation yields, which are nearly featureless above threshold. Additionally, the lack of the OH- fragment indicates radiative decay and provides a negligible amount of anion formation.
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  • Yu, Sung W., et al. (författare)
  • Anionic and cationic photofragmentation of core-excited N2O
  • 2003
  • Ingår i: J. Phys. B: At. Mol. Opt. Phys. - 0953-4075. ; 36, s. 1255-1261
  • Tidskriftsartikel (refereegranskat)abstract
    • We have measured all detectable cationic and anionic fragments in singlechannel mode from N2O as a function of photon energy in the vicinity of the nitrogen 1s core-level threshold. Due to the high degree of localization of the core electrons, the two excitations Nt1s → 3π∗ and Nc1s → 3π∗ show high levels of site-selective behaviour. The observed partial ion yield for the sole anionic fragment,O−, in conjunctionwith the partial cation yields,confirms our previous demonstration of anion-yield spectroscopy as a unique tool to identify core-level shape resonances.
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  • Resultat 1-8 av 8

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