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Träfflista för sökning "WFRF:(Medina E) srt2:(2000-2004)"

Sökning: WFRF:(Medina E) > (2000-2004)

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  • Spolaore, P., et al. (författare)
  • Identification and study of the very neutron deficient nuclide I-111 : search for octupole correlations in the region of N approximate to Z approximate to 56
  • 2001
  • Ingår i: Nuclear Physics A. - 0375-9474 .- 1873-1554. ; 682, s. 387C-393C
  • Tidskriftsartikel (refereegranskat)abstract
    • High-spin states in the neutron-deficient nuclide I-111 have been populated with the fusion reaction Ni-58 + Ni-58 at a beam energy of 210 MeV, in an experiment performed at the Tandem Accelerator of the Laboratori Nazionali di Legnaro. The gamma spectrometer GASP was used in time coincidence with the ISIS Si-ball and the CAMEL recoil mass spectrometer for the positive identification of the nuclide. Gamma transitions and structure details previously attributed to I-111 by Other authors are only partially confirmed. The obtained level scheme includes new rotational bands and a new low lying structure which suggests the presence of octupole correlations at predicted rotational frequency values.
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5.
  • Toppel, AW, et al. (författare)
  • Contribution of protein G-related alpha(2)-macroglobulin-binding protein to bacterial virulence in a mouse skin model of group a streptococcal infection
  • 2003
  • Ingår i: Journal of Infectious Diseases. - 1537-6613. ; 187:11, s. 1694-1703
  • Tidskriftsartikel (refereegranskat)abstract
    • Protein G-related alpha(2)-macroglobulin-binding (GRAB) protein is a cell wall-attached determinant of group A streptococcus (GAS) that interacts with the human protease inhibitor a 2-macroglobulin (alpha(2)-M). Of 86 clinical isolates tested, 23% could bind a alpha(2)-M. However, all strains tested contained the grab gene. High levels of anti-GRAB antibodies were found in the serum of convalescent GAS-infected patients, a finding that indicates that this protein is expressed during the infection process. Among the alpha(2)-M-binding strains, 80% were skin isolates, and 20% were throat isolates, findings that suggest that the skin environment is a preferential site for expression of alpha(2)-M-binding activity. To test this possibility, we determined the role of GRAB in a mouse model of GAS skin infection. The wild-type strain KTL3, which interacts with alpha(2)-M, showed high virulence. The isogenic mutant of KTL3, MR4, devoid of surface-bound GRAB, was attenuated in virulence, compared with the wildtype strain. Thus, mice infected with MR4 survived longer, developed smaller skin lesions, and exhibited lower levels of bacterial dissemination than did those infected with KTL3. These results emphasize the role of GRAB as a virulence factor of GAS.
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