Universitätspublikationen
Refine
Year of publication
- 2004 (85) (remove)
Document Type
- Article (85) (remove)
Language
- English (62)
- German (20)
- Portuguese (2)
- Multiple languages (1)
Has Fulltext
- yes (85)
Is part of the Bibliography
- no (85) (remove)
Keywords
- septic shock (2)
- Abort (1)
- Adorno (1)
- Angiogenesis (1)
- Aspirin (1)
- COPD (1)
- Calycotome villosa (Poiret) Link Subsp. Intermedia (1)
- Cardiac fibroblast (1)
- Chronic obstructive pulmonary disease (1)
- Critical Theory (1)
Institute
We report results on rho (770)0--> pi + pi - production at midrapidity in p+p and peripheral Au+Au collisions at sqrt[sNN]=200 GeV. This is the first direct measurement of rho (770)0--> pi + pi - in heavy-ion collisions. The measured rho 0 peak in the invariant mass distribution is shifted by ~40 MeV/c2 in minimum bias p+p interactions and ~70 MeV/c2 in peripheral Au+Au collisions. The rho 0 mass shift is dependent on transverse momentum and multiplicity. The modification of the rho 0 meson mass, width, and shape due to phase space and dynamical effects are discussed.
We report on the rapidity and centrality dependence of proton and antiproton transverse mass distributions from 197Au + 197Au collisions at sqrt[sNN ]=130 GeV as measured by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). Our results are from the rapidity and transverse momentum range of |y| <0.5 and 0.35< pt <1.00 GeV/c . For both protons and antiprotons, transverse mass distributions become more convex from peripheral to central collisions demonstrating characteristics of collective expansion. The measured rapidity distributions and the mean transverse momenta versus rapidity are flat within |y| <0.5 . Comparisons of our data with results from model calculations indicate that in order to obtain a consistent picture of the proton (antiproton) yields and transverse mass distributions the possibility of prehadronic collective expansion may have to be taken into account.
Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au + Au collisions at √sNN = 130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are K+/π− = 0.161± 0.002(stat) ± 0.024(syst) and K−/π− = 0.146± 0.002(stat) ± 0.022(syst) for the most central collisions. The K+/π− ratio is lower than the same ratio observed at the SPS while the K−/π− is higher than the SPS result. The ratios are enhanced by about 50% relative to p + p and p¯ + p collision data at similar energies.
his Erratum replaces incorrect plots shown in Fig. 7 with the corrected ones. In the publication, the NA57 [1] ratios of Ξ− and Ξ¯¯¯¯+ to the number of wounded nucleons at ⟨NW⟩=349 by mistake were plotted at the wrong values. The ratios were calculated and plotted by mistake using ⟨NW⟩=249.
The correct normalization does not change the conclusions of the paper. The correctly normalized results are presented in Fig. 7.
The transverse mass mt distributions for deuterons and protons are measured in Pb+Pb reactions near midrapidity and in the range 0<mt–m<1.0 (1.5) GeV/c2 for minimum bias collisions at 158A GeV and for central collisions at 40 and 80 A GeV beam energies. The rapidity density dn/dy, inverse slope parameter T and mean transverse mass <mt> derived from mt distributions as well as the coalescence parameter B2 are studied as a function of the incident energy and the collision centrality. The deuteron mt spectra are significantly harder than those of protons, especially in central collisions. The coalescence factor B2 shows three systematic trends. First, it decreases strongly with increasing centrality reflecting an enlargement of the deuteron coalescence volume in central Pb+Pb collisions. Second, it increases with mt. Finally, B2 shows an increase with decreasing incident beam energy even within the SPS energy range. The results are discussed and compared to the predictions of models that include the collective expansion of the source created in Pb+Pb collisions.
Sommer 1789: Frankreich revoltiert, Preußen evaluiert. Staatsminister Johann Christoph von Wöllner, Chef des geistlichen Departements, entsendet einen bewährten Berliner Schulmann ins deutsche Reich, mit dem Auftrag, die außerpreußischen Lehranstalten zu begutachten, "teils überhaupt die Verfassung der fremden Universitäten kennen zu lernen, teils von dem Vortrag solcher Professoren, auf die einmal bei irgend einer preußischen Universität reflektiert werden könnte, zuverlässig Nachricht und Kenntnis einzuziehen". Es ist Friedrich Gedike, der durch ministeriale Order zum Headhunter für das Königreich ernannt wird. Seine Beobachtungen legt er in einem Bericht an den König nieder, der, 1905 ediert, 61 Blätter umfasst. ...
P-O bond destabilization accelerates phosphoenzyme hydrolysis of sarcoplasmic reticulum Ca2+-ATPase
(2004)
The phosphate group of the ADP-insensitive phosphoenzyme (E2-P) of sarcoplasmic reticulum Ca2+-ATPase (SERCA1a) was studied with infrared spectroscopy to understand the high hydrolysis rate of E2-P. By monitoring an autocatalyzed isotope exchange reaction, three stretching vibrations of the transiently bound phosphate group were selectively observed against a background of 50,000 protein vibrations. They were found at 1194, 1137, and 1115 cm–1. This information was evaluated using the bond valence model and empirical correlations. Compared with the model compound acetyl phosphate, structure and charge distribution of the E2-P aspartyl phosphate resemble somewhat the transition state in a dissociative phosphate transfer reaction; the aspartyl phosphate of E2-P has 0.02 Å shorter terminal P–O bonds and a 0.09 Å longer bridging P–O bond that is ∼20% weaker, the angle between the terminal P–O bonds is wider, and –0.2 formal charges are shifted from the phosphate group to the aspartyl moiety. The weaker bridging P–O bond of E2-P accounts for a 1011–1015-fold hydrolysis rate enhancement, implying that P–O bond destabilization facilitates phosphoenzyme hydrolysis. P–O bond destabilization is caused by a shift of noncovalent interactions from the phosphate oxygens to the aspartyl oxygens. We suggest that the relative positioning of Mg2+ and Lys684 between phosphate and aspartyl oxygens controls the hydrolysis rate of the ATPase phosphoenzymes and related phosphoproteins.
Solidarität!
(2004)
Rechtshistorikern ist das Thema der Solidarität – und das damit verbundene Antithema eines ausufernden Individualismus – alt vertraut. Die Frage des sozialen Defizits jener Privatrechtskodifikation, die uns das 19. Jahrhundert hinterlassen hat, gehört zu den Königsthemen der Disziplin, seit Menger und Gierke mit den rechtstheoretischen Protagonisten des BGB die Klingen kreuzten. Und vor allem die Diskurse des Arbeits-, Sozial- und Verfassungsrechts, aber beileibe nicht nur sie, haben sich seit jenen Tagen in eindringlicher Weise mit den Konsequenzen beschäftigt, die sich aus der Integration kollektiver und solidaristischer Elemente in die Rechtsstruktur für das Recht selbst und für seine innergesellschaftliche Umwelt ergeben haben. ...
Regieren durch Solidarität?
(2004)
In Thomas Bernhards "Am Ziel" blickt der Dramatische Schriftsteller auf die Familienkämpfe seiner Jugend zurück: "Sie zogen mir eine Jacke an und sagten – so das ist die lebenslängliche Jacke für dich – und ich zog die Jacke wieder aus. Sie zogen Sie mir an – und ich zog sie wieder aus – immer so fort sie zogen sie mir an – ich zog sie wieder aus." "Ich ging weg ich machte mich selbständig." Dann gleichsam bilanzierend: "Ich fühlte mich mit mir selbst solidarisch – mit keinem Andern – Ich rettete mich aus den Andern heraus." Und die Kommunikationspartnerin echot unwidersprochen: "Sie retteten sich auf Kosten der Ihrigen." ...