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Transverse momentum (pT) spectra of pions, kaons, and protons up to pT=20 GeV/c have been measured in Pb-Pb collisions at sNN−−−√=2.76 TeV using the ALICE detector for six different centrality classes covering 0-80%. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT≈3 GeV/c in central Pb-Pb collisions that decreases towards more peripheral collisions. For pT>10 GeV/c, the nuclear modification factor is found to be the same for all three particle species in each centrality interval within systematic uncertainties of 10-20%. This suggests there is no direct interplay between the energy loss in the medium and the particle species composition in the hard core of the quenched jet. For pT<10 GeV/c, the data provide important constraints for models aimed at describing the transition from soft to hard physics.
Transverse momentum (pT) spectra of pions, kaons, and protons up to pT=20 GeV/c have been measured in Pb-Pb collisions at sNN−−−√=2.76 TeV using the ALICE detector for six different centrality classes covering 0-80%. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT≈3 GeV/c in central Pb-Pb collisions that decreases towards more peripheral collisions. For pT>10 GeV/c, the nuclear modification factor is found to be the same for all three particle species in each centrality interval within systematic uncertainties of 10-20%. This suggests there is no direct interplay between the energy loss in the medium and the particle species composition in the hard core of the quenched jet. For pT<10 GeV/c, the data provide important constraints for models aimed at describing the transition from soft to hard physics.
Das in der I. Mitteilung beschriebene Nucleoprotein führt bei Zugabe zu Tropokollagen-Lösungen zur Bildung von kollagenen Fibrillen. Die Fibrillen-bildende Potenz des Nucleoproteins ist sehr groß. Die gebildeten Fibrillen zeigen eine sehr gute Feinstruktur und weisen eine 640 Å Hauptperiodik auf. Es ist zu vermuten, daß dem ubiquitär im Organismus vorkommenden Nucleoprotein eine bedeutende oder gar ausschlaggebende Rolle bei der Bildung von kollagenen Fibrillen aus Tropokollagen im Organismus zukommt.
In weiteren Versuchen wurden Streptokokken der Gruppe A und C dem in der I. Mitteilung beschriebenen Trennungsgang unterworfen. Es gelang dabei, aus diesen Streptokokken ein Nucleoprotein zu isolieren, das in bezug auf seine elektrophoretischen Eigenschaften, Farbreaktionen, UV-Absorptionskurve, Zuckeranalyse mit dem aus menschlichen und tierischen Organen gewonnenen Nucleoprotein identisch ist.