71 research outputs found

    Occurrence and genetic characterization of Echinococcus granulosus in naturally infected adult sheep and cattle in Romania

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    An epidemiological and molecular study was conducted to investigate the occurrence and genetic diversity of Echinococcus granulosus isolates from adult sheep and cattle in Romania. Overall, 642 sheep (aged over 3 years) and 1878 cattle (aged over 5 years) from 16 counties were examined for hydatid cysts. Of them, 421 (65.6%) sheep and 754 (40.1%) cattle were found infected by cystic echinococcosis (CE). Germinal layers were collected from 98 individual cysts (one cyst per animal; 31 from sheep and 67 from cattle), DNA was extracted and two different mitochondrial DNA genes, namely cytochrome c oxidase subunits 1 (CO1) and 12S ribosomal DNA (12S rDNA) were used as genetic markers. The assessment of the genetic diversity of the Echinococcus strains showed the presence of the E. granulosus sensu stricto complex and disclosed an apparent dominance of the G1 genotype within the G1-G3 complex. Furthermore, several mitochondrial variants were identified for the G1 and G2 genotypes of E. granulosus s.s. complex. Overall, the findings were of epidemiological relevance and highlighted a high potential risk of zoonotic infection

    Novel technique for direct measurement of the plasma diffusion coefficient in magnetized plasma

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    The diffusion coefficient in the edge plasma of fusion devices is measured by a new technique. The method is based on studying the decay of the plasma fluctuation spectrum inside the so-called "Ball-pen probe": a small ceramic tube having its mouth flush with a magnetic surface and a movable electrode inside the tube. When the electrode protrudes from the tube, the measured signal shows the floating potential fluctuations of the plasma or the ion saturation current outside the tube. Retracting the electrode into the tube, the power spectrum of the signal displays an exponential decay that is different for different frequencies. Assuming a mainly diffusive behaviour of the plasma inside the tube, the spectrum decay length can be used to derive the value of the diffusion coefficient. The measurements were performed at several radial positions in the CASTOR edge region for three different values of B-tor

    Occurrence and genetic characterization of Echinococcus granulosus in naturally infected adult sheep and cattle in Romania

    No full text
    An epidemiological and molecular study was conducted to investigate the occurrence and genetic diversity of Echinococcus granulosus isolates from adult sheep and cattle in Romania. Overall, 642 sheep (aged over 3 years) and 1878 cattle (aged over 5 years) from 16 counties were examined for hydatid cysts. Of them, 421 (65.6%) sheep and 754 (40.1%) cattle were found infected by cystic echinococcosis (CE). Germinal layers were collected from 98 individual cysts (one cyst per animal; 31 from sheep and 67 from cattle), DNA was extracted and two different mitochondrial DNA genes, namely cytochrome c oxidase subunits 1 (CO1) and 12S ribosomal DNA (12S rDNA) were used as genetic markers. The assessment of the genetic diversity of the Echinococcus strains showed the presence of the E. granulosus sensu stricto complex and disclosed an apparent dominance of the G1 genotype within the G1–G3 complex. Furthermore, several mitochondrial variants were identified for the G1 and G2 genotypes of E. granulosus s.s. complex. Overall, the findings were of epidemiological relevance and highlighted a high potential risk of zoonotic infection

    Measurements of plasma diffusion coefficient in Pilot-PSI device using Katsumata probe

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    Cross-field transport of particles and energy is a major issue in magnetized fusion-relevant plasmas, due to its relevance for plasma confinement. In this paper Katsumata probe measurements performed in Pilot-PSI linear magnetized plasma device are presented. The plasma diffusion coefficient in perpendicular direction to the magnetic field was estimated from the measurements

    Long-range angular correlations of π, K and p in p–Pb collisions at sNN\sqrt{s_{NN}} = 5.02 TeV

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    Angular correlations between unidentified charged trigger particles and various species of charged associated particles (unidentified particles, pions, kaons, protons and antiprotons) are measured by the ALICE detector in p-Pb collisions at a nucleon--nucleon centre-of-mass energy of 5.02 TeV in the transverse-momentum range 0.3 < pTp_T < 4 GeV/c. The correlations expressed as associated yield per trigger particle are obtained in the pseudorapidity range |ηlab\eta_{lab}| < 0.8. Fourier coefficients are extracted from the long-range correlations projected onto the azimuthal angle difference and studied as a function of pTp_T and in intervals of event multiplicity. In high-multiplicity events, the second-order coefficient for protons, v2pv_2^p, is observed to be smaller than that for pions, v2πv_2^\pi, up to about pTp_T = 2 GeV/c. To reduce correlations due to jets, the per-trigger yield measured in low-multiplicity events is subtracted from that in high-multiplicity events. A two-ridge structure is obtained for all particle species. The Fourier decomposition of this structure shows that the second-order coefficients for pions and kaons are similar. The v2pv_2^p is found to be smaller at low pTp_T and larger at higher pTp_T than v2πv_2^\pi, with a crossing occurring at about 2 GeV. This is qualitatively similar to the elliptic-flow pattern observed in heavy-ion collisions. A mass ordering effect at low transverse momenta is consistent with expectations from hydrodynamic model calculations assuming a collectively expanding system.Angular correlations between unidentified charged trigger particles and various species of charged associated particles (unidentified particles, pions, kaons, protons and antiprotons) are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV in the transverse-momentum range 0.3<pT<40.3 < p_{\rm T} < 4 GeV/cc. The correlations expressed as associated yield per trigger particle are obtained in the pseudorapidity range ηlab<0.8|\eta_{\rm lab}|<0.8. Fourier coefficients are extracted from the long-range correlations projected onto the azimuthal angle difference and studied as a function of pTp_{\rm T} and in intervals of event multiplicity. In high-multiplicity events, the second-order coefficient for protons, v2pv_2^p, is observed to be smaller than that for pions, v2πv_2^\pi, up to about pT=2p_{\rm T} = 2 GeV/cc. To reduce correlations due to jets, the per-trigger yield measured in low-multiplicity events is subtracted from that in high-multiplicity events. A two-ridge structure is obtained for all particle species. The Fourier decomposition of this structure shows that the second-order coefficients for pions and kaons are similar. The v2pv_2^p is found to be smaller at low pTp_{\rm T} and larger at higher pTp_{\rm T} than v2piv_2^pi, with a crossing occurring at about 2 GeV. This is qualitatively similar to the elliptic-flow pattern observed in heavy-ion collisions. A mass ordering effect at low transverse momenta is consistent with expectations from hydrodynamic model calculations assuming a collectively expanding system.Angular correlations between unidentified charged trigger particles and various species of charged associated particles (unidentified particles, pions, kaons, protons and antiprotons) are measured by the ALICE detector in p–Pb collisions at a nucleon–nucleon centre-of-mass energy of 5.02 TeV in the transverse-momentum range 0.3<pT<4 GeV/c . The correlations expressed as associated yield per trigger particle are obtained in the pseudorapidity range |ηlab|<0.8 . Fourier coefficients are extracted from the long-range correlations projected onto the azimuthal angle difference and studied as a function of pT and in intervals of event multiplicity. In high-multiplicity events, the second-order coefficient for protons, v2p , is observed to be smaller than that for pions, v2π , up to about pT=2 GeV/c . To reduce correlations due to jets, the per-trigger yield measured in low-multiplicity events is subtracted from that in high-multiplicity events. A two-ridge structure is obtained for all particle species. The Fourier decomposition of this structure shows that the second-order coefficients for pions and kaons are similar. The v2p is found to be smaller at low pT and larger at higher pT than v2π , with a crossing occurring at about 2 GeV/c . This is qualitatively similar to the elliptic-flow pattern observed in heavy-ion collisions. A mass ordering effect at low transverse momenta is consistent with expectations from hydrodynamic model calculations assuming a collectively expanding system

    Production of inclusive ϒ(1S) and ϒ(2S) in p–Pb collisions at √sNN = 5.02 TeV

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    We report on the production of inclusive Υ(1S) and Υ(2S) in p-Pb collisions at sNN−−−√=5.02 TeV at the LHC. The measurement is performed with the ALICE detector at backward (−4.46<ycms<−2.96) and forward (2.03<ycms<3.53) rapidity down to zero transverse momentum. The production cross sections of the Υ(1S) and Υ(2S) are presented, as well as the nuclear modification factor and the ratio of the forward to backward yields of Υ(1S). A suppression of the inclusive Υ(1S) yield in p-Pb collisions with respect to the yield from pp collisions scaled by the number of binary nucleon-nucleon collisions is observed at forward rapidity but not at backward rapidity. The results are compared to theoretical model calculations including nuclear shadowing or partonic energy loss effects

    Corrigendum to 'Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at sNN\sqrt{s_{NN}} = 2.76 TeV' [Phys. Lett. B 728 (2014) 216-227]

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    Production of inclusive ϒ(1S) and ϒ(2S) in p–Pb collisions at sNN=5.02\sqrt{s_{\rm NN}} = 5.02 TeV

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    We report on the production of inclusive ϒ (1S) and ϒ (2S) in p–Pb collisions at sNN=5.02 TeV at the LHC. The measurement is performed with the ALICE detector at backward ( −4.46<ycms<−2.96 ) and forward ( 2.03<ycms<3.53 ) rapidity down to zero transverse momentum. The production cross sections of the ϒ (1S) and ϒ (2S) are presented, as well as the nuclear modification factor and the ratio of the forward to backward yields of ϒ (1S). A suppression of the inclusive ϒ (1S) yield in p–Pb collisions with respect to the yield from pp collisions scaled by the number of binary nucleon–nucleon collisions is observed at forward rapidity but not at backward rapidity. The results are compared to theoretical model calculations including nuclear shadowing or partonic energy loss effects
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