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Sökning: WFRF:(Zhang YW)

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  • Zhang, YW, et al. (författare)
  • High-fluence Co implantation in Si, SiO2/Si and Si3N4/Si Part I: formation of thin silicide surface films
  • 1999
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - : ELSEVIER SCIENCE BV. - 0168-583X. ; 159:3, s. 142-157
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • In order to obtain thin CoSi2 surface layers, Si(1 1 1) and Si(1 0 0), covered by SiO2 or Si3N4 With different thickness, have been implanted by Co to normal fluences from 1x10(16) to 2.6x10(18) ions cm(-2). The Co ions were produced by a high beam curren
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  • Zhang, YW, et al. (författare)
  • Sputtering transients for some transition elements during high-fluence MEVVA implantation of Si
  • 2001
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - : ELSEVIER SCIENCE BV. - 0168-583X. ; 173:4, s. 427-435
  • Tidskriftsartikel (refereegranskat)abstract
    • The approach to quasi equilibrium sputtering of transition elements Co, Er. V and Ni during high-fluence implantation of Si(1 1 1) using a metal vapour vacuum are (MEVVA) source has been studied by time of flight-energy elastic recoil detection analysis (
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  • Bai, XN, et al. (författare)
  • Molecular Characterization and Comparative Genomics of Clinical Hybrid Shiga Toxin-Producing and Enterotoxigenic Escherichia coli (STEC/ETEC) Strains in Sweden
  • 2019
  • Ingår i: Scientific reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 9:1, s. 5619-
  • Tidskriftsartikel (refereegranskat)abstract
    • Hybrid E. coli pathotypes are representing emerging public health threats with enhanced virulence from different pathotypes. Hybrids of Shiga toxin-producing and enterotoxigenic E. coli (STEC/ETEC) have been reported to be associated with diarrheal disease and hemolytic uremic syndrome (HUS) in humans. Here, we identified and characterized four clinical STEC/ETEC hybrids from diarrheal patients with or without fever or abdominal pain and healthy contact in Sweden. Rare stx2 subtypes were present in STEC/ETEC hybrids. Stx2 production was detectable in stx2a and stx2e containing strains. Different copies of ETEC virulence marker, sta gene, were found in two hybrids. Three sta subtypes, namely, sta1, sta4 and sta5 were designated, with sta4 being predominant. The hybrids represented diverse and rare serotypes (O15:H16, O187:H28, O100:H30, and O136:H12). Genome-wide phylogeny revealed that these hybrids exhibited close relatedness with certain ETEC, STEC/ETEC hybrid and commensal E. coli strains, implying the potential acquisition of Stx-phages or/and ETEC virulence genes in the emergence of STEC/ETEC hybrids. Given the emergence and public health significance of hybrid pathotypes, a broader range of virulence markers should be considered in the E. coli pathotypes diagnostics, and targeted follow up of cases is suggested to better understand the hybrid infection.
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  • Resultat 31-40 av 93

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