Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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41458 Publications

Experimental hypoxia is a potent stimulus for radiotracer uptake in vitro: Comparison of different tumor cells and primary endothelial cells

Oswald, J.; Treite, F.; Haase, C.; Kampfrath, T.; Mäding, P.; Schwenzer, B.; Bergmann, R.; Pietzsch, J.

Hypoxia causes upregulation of vascular endothelial growth factor (VEGF) which is a key regulator in tumor angiogenesis and essential for the proliferation of endothelial cells. Endothelial cells have been described to accumulate radiotracers like 18F-FDG. However, the contribution of radiotracer uptake by endothelial cells to uptake measured in tumors by positron emission tomography (PET) is still unclear. In this study 18F-FDG and 18F-FMISO radiotracer uptake in various tumor and primary endothelial cells cultured at hypoxic conditions was investigated. Experimental hypoxia was confirmed by significant upregulation of VEGF mRNA. In comparison to normoxic conditions, cellular uptake of 18F-FDG was significantly increased at hypoxic conditions in two of the tumor and all endothelial cells, whereas 18F-FMISO uptake was only enhanced in tumor cell lines HT-29 and MCF-7. Our data showed a marked influence of experimental hypoxia on the metabolism and gene expression of tumor and endothelial cells in vitro. This indicates an important contribution of endothelial cells to 18F-FDG radiotracer uptake in tumors and for the visualization of tumors by means of PET.

Keywords: Hypoxia; VEGF; Endothelial cells; Radiotracer uptake; 18F-FDG; 18F-FMISO

Permalink: https://www.hzdr.de/publications/Publ-10068

Receptor for Advanced Glycation Endproducts in Health and Disease

Pietzsch, J.; (Editor)

kein Abstract verfügbar

  • Book (Editorship)
    Trivandrum, Kerala, India: Research Signpost, 2007
    50 Seiten

Permalink: https://www.hzdr.de/publications/Publ-10067

An algebraic approach to bare nucleon matrix elements

Zschocke, S.

  • Lecture (others)
    Institut für Theoretische Physik, 10.12.2004, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10066

Splitting and mixing of the ρ and ω in nuclear matter

Zschocke, S.

  • Lecture (Conference)
    KFKI-RMKI, 19.11.2004, Budapest, Hungary
  • Invited lecture (Conferences)
    FIAS, 03.12.2004, Frankfurt am Main, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10065

Mass-shift of the ρ and ω meson and their mixing in nuclear matter

Zschocke, S.

Mass-shift of the ρ and ω meson and their mixing in nuclear matter

  • Lecture (others)
    Institut für Theoretische Physik, 06.06.2004, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10064

ρ − ω splitting and mixing in nuclear matter

Zschocke, S.

  • Lecture (Conference)
    DPG Frühjahrstagung, 08.-12.03.2004, Köln, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10063

Radical Enhanced Atomic Layer Deposition of Tantalum Oxide

Niskanen, A.; Kreissig, U.; Leskelä, M.; Ritala, M.

Tantalum oxide was deposited by radical enhanced atomic layer deposition using tantalum ethoxide and oxygen radicals. The radicals were produced by dissociating oxygen gas in a remote microwave plasma discharge. Argon was used as the carrier and purge gas. The films were deposited at 150 and 250°C on glass, silicon, and platinum substrates. Growth rate of the films was 0.19 nm per cycle with a 0.6 s pulse length for tantalum ethoxide and 3 s for oxygen radicals. The films were amorphous according to X-ray diffraction. The densities measured by X-ray reflectivity were between 7.1 and 7.6 g/cm3 for films grown both at 150 and 250°C. The dielectric constants were 28 and 36 for films grown on platinum electrodes at 150 and 250 °C, respectively. The leakage current densities at 1 MV/cm electric field were less than 1 x 10-8 A/cm2 for both deposition temperatures. The effect of water as an additional oxidant was studied at 250 °C. The water was supplied as a separate pulse either right before or after the tantalum ethoxide pulse.

  • Chemistry of Materials 19(2007), 2316-2320

Permalink: https://www.hzdr.de/publications/Publ-10062

Photon scattering from 92Mo, 98Mo and 100Mo up to the neutron-seperation energy

Rusev, G.

  • Lecture (Conference)
    DPG Frühjahrstagung, 08.-12.03.2004, Köln, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10061

The ELBE Microbeam

Pawelke, J.

  • Lecture (Conference)
    Microbeam-Workshop, 30.-31.03.2004, Darmstadt, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10060

Feasibilty of dose quantification with in-beam PET data in radiotherapy with 12C and proton beams

Parodi, K.

  • Invited lecture (Conferences)
    BROWN BAG - physics seminar, 12.12.2004, Boston, USA

Permalink: https://www.hzdr.de/publications/Publ-10059

The feasibility of in-beam PET for proton therapy

Parodi, K.

  • Invited lecture (Conferences)
    BROWN BAG - physics seminar, 02.02.2004, Boston, USA

Permalink: https://www.hzdr.de/publications/Publ-10058

Testing of X-ray sensitive detectors at ELBE

Naumann, L.

  • Lecture (Conference)
    CBM Collaboration Meeting, 07.10.2004, Darmstadt, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10057

FAIR an international accelerator facility for antiproton and ion beam research in Darmstadt

Naumann, L.

  • Invited lecture (Conferences)
    INTAS TRD Collaboration Meeting, 01.07.2004, Gatchina, Russia

Permalink: https://www.hzdr.de/publications/Publ-10056

Structural and tribological properties of cluster-assembled CNx films

Blomqvist, M.; Bongiorno, G.; Podesta, A.; Serin, V.; Abrasonis, G.; Kreissig, U.; Möller, W.; Coronel, E.; Wachtmeister, S.; Csillag, S.; Cassina, V.; Piseri, P.; Milani, P.

We report the structural and tribological characterization of nanostructured CNx thin films produced by the deposition of a supersonic carbon cluster beam assisted by nitrogen ion bombardment. The influence of the deposition parameters on the chemical composition and structure of the films has been systematically studied by X-ray photoelectron spectroscopy, elastic recoil detection analysis, transmission electron microscopy and atomic force microscopy. Depending on the deposition parameters, the films show a structure ranging from amorphous to disordered graphitic with interlinked planes. Nitrogen content depends on the nitrogen ion kinetic energy. The films have a very low density with a high surface roughness. Friction measurements at the nanoscale show a correlation between nitrogen content and mechanical properties of the system.

  • Applied Physics A 87(2007), 767-772

Permalink: https://www.hzdr.de/publications/Publ-10055

Bi-annual Report 2005/06 - Rossendorf Beamline at ESRF (ROBL-CRG)

Scheinost, A.; von Borany, J.; (Editors)

  • Open Access Logo Wissenschaftlich-Technische Berichte / Helmholtz-Zentrum Dresden-Rossendorf; FZD-463 2007
    ISSN: 1437-322X

Downloads

Permalink: https://www.hzdr.de/publications/Publ-10054

Dileptons and charm as probes of chiral restoration

Kämpfer, B.

  • Invited lecture (Conferences)
    Int. Conf. High Energy Phys., 16.-22.04.2004, Bejing, China

Permalink: https://www.hzdr.de/publications/Publ-10053

Quasiparticle model of QCD matter above and below Tc and at large μ

Kämpfer, B.

  • Lecture (Conference)
    Int. Symp. ”The QCD phase diagramme: from theory to experiment”, 28.05.-03.06.2004, Skopelos, Greece

Permalink: https://www.hzdr.de/publications/Publ-10052

Phantastische Ausblicke auf unser Universum

Kämpfer, B.

  • Lecture (others)
    Urania-Seniorenakademie, 05.05.2004, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10051

QCD equation of state above and below Tc

Kämpfer, B.

  • Lecture (Conference)
    XLII Int. Winter Meeting on Nucl. Physics, 25.-31.01.2004, Bormio, Italy

Permalink: https://www.hzdr.de/publications/Publ-10050

Baryon resonances and the production of light vector mesons near thresholds

Kämpfer, B.

  • Lecture (Conference)
    Internat. Workshop, 11.-17.01.2004, Hirschegg, Österreich

Permalink: https://www.hzdr.de/publications/Publ-10049

Overview of the present status of the SRF gun design and construction

Michel, P.

  • Invited lecture (Conferences)
    Workshop on Advanced Free Electron Lasers and Their Applications, 24.-25.06.2004, Taiwan, China

Permalink: https://www.hzdr.de/publications/Publ-10048

Electron Beam Diagnostics at the ELBE Free Electron Laser

Michel, P.

  • Invited lecture (Conferences)
    Workshop on Advanced Free Electron Lasers and Their Applications, 24.-25.06.2004, Taiwan, China

Permalink: https://www.hzdr.de/publications/Publ-10047

Design and Status of the Radiation Source ELBE and its FEL(s)

Michel, P.

  • Invited lecture (Conferences)
    Workshop on Advanced Free Electron Lasers and Their Applications, 24.-25.06.2004, Taiwan, China

Permalink: https://www.hzdr.de/publications/Publ-10046

Experiments and simulation on bubbly flow in a complex 3D flow field

Lucas, D.; Prasser, H.-M.; Krepper, E.; Beyer, M.

A new approach for the modelling of poly-dispersed bubbly flows – the so-called Inhomogeneous Multi Bubble Size Group (MUSIG) model was developed jointly by FZD and ANSYS. It was implemented into the CFX code and is now available starting with code version 10. This model enables the consideration of a number bubble classes in the mass balance as well as in the momentum balance. Usually only few classes are required for the momentum balance to reflect the bubble size dependent de-mixing of small and large bubbles caused by the inversion of the sign of the lift force with increasing bubble diameter. The model was developed and first tested using data for vertical pipe flow. To show the indepen¬dency of the model on geometry and to test it for more complex flow situations, now experiments were conducted with a pronounced three-dimensional character of the flow fields. A diaphragm which blocks about one half of the pipe was placed into the vertical DN200 test sections available at the TOPFLOW facility of FZD. Main feature is the trans¬location of the diaphragm to scan the 3D void field with a stationary wire-mesh sensor. Be¬sides the measurement of time-averaged void fraction fields, a novel data evaluation method was developed to extract estimated liquid velocity profiles from the wire-mesh sensor data. Simulations were done using CFX-10 and applying the Inhomogeneous MUSIG model. In general the complex flow including a recirculation zone behind the obstacle (where bubble coalescence is observed) and a pronounced jet of high liquid velocity at the unobstructed side (were bubble break-up dominates) are reflected well in the simulations. There is a strong interaction between size dependent bubble migration in the complex liquid velocity field (mainly caused by the lift force) and local bubble coalescence and break-up. The data clearly demonstrate the necessity to consider the bubble size dependent bubble migration for an adequate simulation of bubbly flows in complex geometries. Some weaknesses of the simulations are connected with shortcomings in the modelling of bubble coalescence and break-up.

Keywords: bubbly flow; 3D; flow field; CFD

  • Lecture (Conference)
    45th European Two-Phase Flow Group Meeting, 22.-25.05.2007, Toulouse, France

Permalink: https://www.hzdr.de/publications/Publ-10045

Stability effect of the lateral lift force in bubbly flows

Lucas, D.; Krepper, E.; Prasser, H.-M.; Manera, A.

The role of the lift force for the stability of bubbly flows is discussed. The main interest is directed towards bubble columns, since instabilities caused by the lift force may be one important reason for the transition from homogeneous to heterogeneous flow regimes. The lift force acts on rising bubbles in lateral direction, when gradients of the liquid velocity are present. Such gradients may result from the main liquid flow or from local disturbances in case of initially homogeneous flows. Depending on the sign of the lift force such local disturbances in a homogeneous flow may be damped or enhanced. The corresponding feedback mechanism was previously analysed by means of a linear stability analyses. In the result criteria for stability were obtained for mono-dispersed flow, for a flow with two bubble size groups and finally with some additional approximations also for the case of N bubble size groups or a given bubble size distribution. Recently two different groups confirmed the stability criteria experimentally. Now the effects were investigated also by means of CFD simulations. In a first step bubble coalescence was excluded, while the second step comprises a numerical study which includes coalescence. In the latter case coalescence leads to a transition from stable to instable flow patterns along the height position in the column. The transitions fit well together with the criteria for stability. Finally the influence of the lift force is discussed also for other flow situations.

Keywords: bubbly flow; stability; bubble column; lift force

  • Contribution to proceedings
    International Conference on Multiphase Flow - ICMF 2007, 09.-13.07.2007, Leipzig, Germany
    paper S1_Mon_C_9
  • Lecture (Conference)
    International Conference on Multiphase Flow - ICMF 2007, 09.-13.07.2007, Leipzig, Germany

Permalink: https://www.hzdr.de/publications/Publ-10044

Spontaneous symmetry breaking and rotational bands

Frauendorf, S.

  • Invited lecture (Conferences)
    Fall meeting of the Div. of Nucl. Phys. of the American Physical Society, 02.10.2004, Chicago, USA

Permalink: https://www.hzdr.de/publications/Publ-10043

Normal persistent currents and gross shell structure at high spin

Frauendorf, S.

  • Lecture (Conference)
    Workshop on mesoscopic physics, 01.10.2004, Michigan, USA

Permalink: https://www.hzdr.de/publications/Publ-10042

Probing shape coexistence by dipole excitations

Frauendorf, S.

  • Lecture (others)
    Forschungszentrum Rossendorf, 01.07.2004, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10041

Experimental evidence for chirality

Frauendorf, S.

  • Lecture (others)
    Niels Bohr Institute, University of Copenhagen, 02.06.2004, Copenhagen, Danmark

Permalink: https://www.hzdr.de/publications/Publ-10040

Symmetries of the cranked mean field

Frauendorf, S.

  • Invited lecture (Conferences)
    International Nuclear Physics Conference, 07.06.2004, Goeteborg, Sweden
  • Invited lecture (Conferences)
    Niels Bohr Institute, 01.06.2004, Copenhagen, Danmark

Permalink: https://www.hzdr.de/publications/Publ-10039

Tilted rotation

Frauendorf, S.

  • Lecture (others)
    Bejing University, 03.04.2004, Bejing, China

Permalink: https://www.hzdr.de/publications/Publ-10038

Nuclear tidal waves

Frauendorf, S.

  • Lecture (others)
    Bejing University, 02.04.2004, Bejing, China

Permalink: https://www.hzdr.de/publications/Publ-10037

Exotic phenomena at high spin

Frauendorf, S.

  • Lecture (Conference)
    Workshop on AGATA physics, 01.03.2004, Orsay, France

Permalink: https://www.hzdr.de/publications/Publ-10036

Topology of conformational changes in photoreceptor activation

Fahmy, K.

  • Lecture (others)
    Universität Frankfurt am Main, 20.12.2004, Frankfurt am Main, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10035

Metallisierung von Proteinen: Wege zu neuen Materialien

Fahmy, K.

  • Lecture (Conference)
    Bruker-Anwendertreffen, 11.11.2004, Ettlingen, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-10034

Proteinstruktur und Funktion: Ein Infrarot-Blick auf Membranproteine

Fahmy, K.

  • Lecture (Conference)
    ISAS, 05.05.2004, Berlin, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-10033

Tomographische Rekonstruktion beim in-beam PET Monitoring der Schwerionentherapie

Enghardt, W.

  • Invited lecture (Conferences)
    DKFZ, 21.01.2004, Heidelberg, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10032

Testing novel time of flight detectors at ELBE: Overview

Dohrmann, F.

  • Lecture (Conference)
    HADES Collaboration Meeting, 30.10.2004, Darmstadt, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-10030

Testing novel time of flight detectors at ELBE: Status report

Dohrmann, F.

  • Lecture (Conference)
    CBM Collaboration Meeting, 07.10.2004, Darmstadt, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-10029

Electroproduction of 3,4H-λ states on Helium

Dohrmann, F.

  • Lecture (Conference)
    19th European Conference on FEW-Body Problems in Physics, 23.08.2004, Groningen, Netherlands

Permalink: https://www.hzdr.de/publications/Publ-10028

Die besondere Rolle der seltsamen Quarks in Kernen und Kernmaterie

Dohrmann, F.

  • Lecture (others)
    Physikalisches Kolloquium der Technischen Universität Dresden, 22.06.2004, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10027

Productions of antikaons in p+Au and p+C collisions

Dohrmann, F.

  • Lecture (Conference)
    DPG Frühjahrstagung, 10.03.2004, Köln, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10026

Testing new time of flight detectors at ELBE: Status report

Dohrmann, F.

  • Lecture (Conference)
    CBM Collaboration Meeting, 13.02.2004, Darmstadt, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10025

In-beam PET for hadron therapy using LSO/APD-array detectors

Crespo, P.

  • Lecture (Conference)
    41th General (Open) Meeting of the Crystal Clear Collaboration, CERN, 29.09.2004, Geneva, Switzerland

Permalink: https://www.hzdr.de/publications/Publ-10024

In-situ monitoring with PET: Suppression of random coincidences during in-beam PET measurements

Crespo, P.

  • Lecture (Conference)
    ENLIGHT Workpackage 5, 06.06.2004, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-10023

Quasi-particle model for deconfined matter

Bluhm, M.

  • Lecture (Conference)
    Strangness in Quark Matter 2004, 15.-20.09.2004, Cape Town, South Africa

Permalink: https://www.hzdr.de/publications/Publ-10022

BUU calculations for K+, K− and φ production for proton-nucleus collisions in the GeV region

Barz, H. W.

  • Invited lecture (Conferences)
    International Workshop on Hot and Dense Matter in Relativistic Heavy-Ion Collisions, 24.-27.03.2004, Budapest, Ungarn

Permalink: https://www.hzdr.de/publications/Publ-10021

Contribution of the nucleon-hyperon reaction channels to K− production in proton-nucleus collisions

Barz, H. W.

  • Lecture (Conference)
    DPG Frühjahrstagung, 08.-12.03.2004, Köln, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10020

Experimental evidence for chirality in the odd-A Rh-105

Timar, J.; Joshi, P.; Starosta, K.; Dimitrov, V.; Fossan, D.; Molnar, J.; Sohler, D.; Wadsworth, R.; Algora, A.; Bednarczyk, P.; Curien, D.; Dombradi, Z.; Duchene, G.; Gizon, A.; Gizon, J.; Jenkins, D.; Koike, T.; Krasznahorkay, A.; Paul, E.; Raddon, P.; Rainovski, G.; Scheurer, J.; Simons, A.; Vaman, C.; Wilkinson, A.; Zolnai, L.; Frauendorf, S.

High-spin states in Rh-105 were populated by the Zr-96(C-13,p3n) reaction at beam energies of 51 and 58 MeV, and studied using the EUROBALL IV gamma-ray spectrometer and the DIAMANT charged particle array. A pair of nearly degenerate DeltaI = 1 three-quasiparticle bands with the same spins and parity have been observed. Comparison of the experimental results with tilted axis cranking calculations confirms the chiral character of the two bands, while arguments based on the excitation of particles within the pig(9/2)nu(h(11/2))(2) configuration of the yrast band and comparison with the previously observed gamma band exclude the other possible interpretations. This is the first experimental evidence for three-quasiparticle chiral structure in the A similar to 100 region, and the first simultaneous observation of a gamma band and chiral partner bands in one nucleus. (C) 2004 Elsevier B.V. All rights reserved.

  • Physics Letters B 598(2004), 178-187

Permalink: https://www.hzdr.de/publications/Publ-10019

Comment on "Electromagnetic dissociation of B-8 and the astrophysical S factor for Be-7(p,gamma)B-8"

Snover, K.; Junghans, A.; Mohrmann, E.

Recently, Davids and Typel recommended a "low" value of S-17(0) based on fits to published direct and Coulomb dissociation data, in which they excluded the precise result of Junghans We show that their statistical analysis is incorrect due to a substantial underestimate of the experimental uncertainties, and that there is no reason to exclude the Junghans result based on statistical arguments.

  • Physical Review C 70(2004), 39801

Permalink: https://www.hzdr.de/publications/Publ-10018

Chiral bands in Rh-105

Alcantara-Nunez, J.; Oliveira, J.; Cybulska, E.; Medina, N.; Rao, M.; Ribas, R.; Rizzutto, M.; Seale, W.; Falla-Sotelo, F.; Wiedemann, K.; Dimitrov, V.; Frauendorf, S.

The Rh-105 nucleus has been studied by in-beam gamma spectroscopy with the heavy-ion fusion-evaporation reaction Mo-100(B-11, alpha2ngamma) at 43 MeV A rich variety of structures was observed at high and low spin, using gamma - gamma - t and gamma - gamma - particle coincidences and directional correlation ratios. Four magnetic dipole bands have also been observed at high spin. Two of them are nearly degenerate in excitation energy and could be chiral partners, as predicted by Tilted Axis Cranking calculations.

  • Open Access Logo Brazilian Journal of Physics 34(2004), 999

Permalink: https://www.hzdr.de/publications/Publ-10017

Magnetic dipole and electric quadrupole rotational structures and chirality in Rh-105

Alcantara-Nunez, J.; Oliveira, J.; Cybulska, E.; Medina, N.; Rao, M.; Ribas, R.; Rizzutto, M.; Seale, W.; Falla-Sotelo, F.; Wiedemann, K.; Dimitrov, V.; Frauendorf, S.

The Rh-105 nucleus has been studied with the Mo-100(B-11, alpha2ngamma) reaction at 43 MeV incident energy. A rich variety of structures was observed at high and low spins, using gamma-gamma-t and gamma-gamma-particle coincidences and directional correlation ratios. A gamma-vibrational band was observed for the first time in this nucleus. A new structure based on the intruder 1/2(+)[431] proton orbital was identified. Four magnetic dipole bands have also been observed at high spin, three of which have negative parity and have similar characteristics: they are very regular in energy spacing, presenting nearly constant alignments and large values of B(M1)/B(E2) ratios. Two of them are nearly degenerate in excitation energy and could be chiral partners. The pig(9/2)xnuh(11/2)(g(7/2),d(5/2)) configuration is tentatively assigned for these bands, with the angular momenta of the proton and neutron intruders and the collective angular momentum aligning along the three perpendicular axes of the triaxial core, as predicted by tilted axis cranking calculations.

  • Physical Review C 69(2004), 024317

Permalink: https://www.hzdr.de/publications/Publ-10016

Vortex structures in the separated flow on an inclined flat plate under electromagnetic forcing: influences of excitation wave form, frequency, and amplitude

Weier, T.; Cierpka, C.; Gerbeth, G.

Wall parallel Lorentz forces have been used to excite the separated flow on the suction side of inclined symmetric hydrofoils. Resulting lift enhancements resemble those known from alternative active flow control methods. The controlled flow is characterized by a small number of relatively large vortices, which are related to the control mechanism. Consequently, time resolved flow fields have been analyzed by proper orthogonal decomposition and continuous wavelet transform to extract dominant features. Both evaluation methods highlight significant influences of excitation frequency, wave form, and amplitude.

Keywords: Proper Orthogonal Decomposition; Continuous Wavelet Analysis; Coherent Structures; Flow Control; Lorentz force

  • Lecture (Conference)
    5th International Symposium on Turbulence and Shear Flow Phenomena, 27.-29.08.2007, München, Germany
  • Contribution to proceedings
    5th International Symposium on Turbulence and Shear Flow Phenomena, 27.-29.08.2007, München, Germany
    Proceedings of the 5th International Symposium on Turbulence and Shear Flow Phenomena, 1105-1110

Permalink: https://www.hzdr.de/publications/Publ-10015

In-Medium Properties of Omega.Meson and Nucleon: QCD Sum Rules Approach and Rule of Four-Quark Condensates

Thomas, R.

  • Invited lecture (Conferences)
    Virtual Institute Workshop III, 16.10.2006, Rathen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10014

In-Medium Change of Four-Quark Condensates: QCD Sum Rules Evaluation for Omega-Meson and Nucleon

Thomas, R.

  • Lecture (Conference)
    44. Int. Universitätswochen für Theoretische Physik, 12.03.2006, Schladming, Dtl.
  • Lecture (Conference)
    Frühjahrstagung der Deutschen Physikalischen Gesellschaft, 22.03.2006, München, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-10013

Omega, Nucleon, D Spectroscopy: QCD Sum Rules in Vakuum and Nuclear Matter

Thomas, R.

  • Lecture (Conference)
    37. Arbeitstreffen "Kernphysik", 08.03.2006, Schleching, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10012

FEL-induced Reflectivity changes in thin DNA-Films

Sczepan, M.

  • Lecture (others)
    Institut für neue Materialien, 12.06.2006, Saarbrücken, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-10011

Electromagnetic excitations in nuclei: from photon scattering to photodisintegration

Schwengner, R.

  • Lecture (Conference)
    Frühjahrstagung der Deutschen Physikalischen Gesellschaft, 20.-24.03.2006, München, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10010

Quenching of electroluminescence and charge trapping in high-efficiency Ge-implanted MOS light-emitting silicon diodes

Nazarov, A.; Osiyuk, I.; Sun, J.; Yankov, R.; Skorupa, W.; Tyagulskii, I.; Lysenko, V.; Prucnal, S.; Gebel, T.; Rebohle, L.

Combined measurements of charge trapping and electroluminescence intensity as a function of injected charge and current have been carried out with the aim of clarifying the mechanisms of electroluminescence (EL) quenching in Ge-implanted ITO-SiO2-Si light-emitting silicon diodes. Good correlation between the negative charge capture in traps of small effective capture cross-sections (sigmat1 e=1.7x10-19 cm2 and sigmat2 e=4.8x10-20 cm2) located in SiO2, and the quenching of the asymmetrical EL line with a maximum intensity at 400 nm has been observed. Similar correlation between the electron capture in traps with extremely small effective capture cross-section (sigmat3 e=5x10-21 cm2) and the quenching of the EL line at 637 nm has been established. A quantitative model for the EL quenching has been developed, which takes into account the modification of the luminescent centers with subsequent electron capture at the newly generated trap! s. The model shows good agreement between simulation and experimental data. It also demonstrates that small effective capture cross-sections for electron charging during the EL quenching are determined by the probability of the luminescence centers (LCs) being disrupted, and enables one to estimate the Ge concentration associated with the EL at 400 nm.

Keywords: Silicon-based light emitter; ion implantation; rare earths; electroluminescence; Metal-Oxide-Silicon-based Light Emitting Diodes (MOSLEDs); hot electron injection; charge trapping

Permalink: https://www.hzdr.de/publications/Publ-10009

Dipole-strength distributions below the giant dipole resonance in 92Mo, 98Mo and 100Mo

Rusev, G.

  • Lecture (others)
    Institut für Kern- und Teilchenphysik, 19.10.2006, Dresden, Deutschland
  • Open Access Logo Wissenschaftlich-Technische Berichte / Helmholtz-Zentrum Dresden-Rossendorf; FZD-478 2007
    ISSN: 1437-322X

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Permalink: https://www.hzdr.de/publications/Publ-10008

Phi-Mesons in C+C collisions at 2 AGeV

Kotte, R.

  • Lecture (Conference)
    Hades collaboration meeting, 25.-28.10.2006, Darmstadt, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10007

Quasi-particle perspective on critical end point

Kämpfer, B.

  • Invited lecture (Conferences)
    Critical point and onset of deconfinement, 02.-09.07.2006, Florence, Italy

Permalink: https://www.hzdr.de/publications/Publ-10006

Our interest on omega mesons

Kämpfer, B.

  • Lecture (Conference)
    OMEGA-Workshop, 19.-20.10.2006, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10005

Interpretation of HADES data

Kämpfer, B.

  • Lecture (Conference)
    Virtual Institute (III): Dense Hadronic Matter and QCD Phase Transitions, 15.-17.10.2006, Rathen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10004

Dense and hot strongly interacting matter on the universe

Kämpfer, B.

  • Lecture (Conference)
    Seminar on IST, 12.09.2006, Lissabon, Portugal
  • Lecture (others)
    Seminar FSU Jena, 01.06.2006, Jena, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-10003

Quasi-particle perspective on equation of state and critical end point

Kämpfer, B.

  • Lecture (Conference)
    Quark Confinement and the Hadron Spectrum VII, 02.-07.09.2006, Ponta Delgado, Portugal

Permalink: https://www.hzdr.de/publications/Publ-10002

Impact of 4-quark condensates on in-medium effects of hadrons

Kämpfer, B.

  • Lecture (Conference)
    Quark Confinement and the Hadron Spectrum VII, 02.-07.09.2006, Ponta Delgado, Portugal

Permalink: https://www.hzdr.de/publications/Publ-10001

Heavy ion reactions at ultrarelativistic energies from hot deconfined matter to hadronic freeze-out

Kämpfer, B.

  • Lecture (Conference)
    ECT* Workshop, 26.06.-21.07.2006, Trento, Italy

Permalink: https://www.hzdr.de/publications/Publ-10000

On the effect of discretization in HELIOS 1.9

Merk, B.; Koch, R.

Study on the discretization effects in HELIOS 1.9 on teh basis of a single cell calculation

Keywords: Neutronics; HELIOS; Discretization; Neutronflux

  • Lecture (others)
    Studsvik 2007 UGM, 31.05.-01.06.2007, West Palm Beach, United States

Permalink: https://www.hzdr.de/publications/Publ-9999

Physics of high baryon density, Presentation of the chapter "In-medium modifications of hadrons"

Kämpfer, B.

  • Lecture (Conference)
    ECT* Workshop, 05.05.-02.06.2006, Trento, Italy

Permalink: https://www.hzdr.de/publications/Publ-9998

Quasi-particle model of QCD matter and a family of equations of state

Kämpfer, B.

  • Lecture (Conference)
    ECT* Workshop, 21.-25.03.2006, Trento, Italy

Permalink: https://www.hzdr.de/publications/Publ-9997

Exclusive virtual bremsstrahlung

Kämpfer, B.

  • Lecture (Conference)
    HADES-Meeting, 04.-08.04.2006, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9996

Medium modifications of hadrons: chiral condensate and more

Kämpfer, B.

  • Lecture (Conference)
    HADES-Meeting, 04.-08.04.2006, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9995

Electromagnetic probes of strongly interacting matter

Kämpfer, B.

  • Lecture (Conference)
    HADES-Meeting, 04.-08.04.2006, Dresden, Deutschland
  • Lecture (Conference)
    Workshop on In-Medium Hadron Physics, 11.11.2004, Gießen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9994

D mesons and the chiral condensate

Kämpfer, B.

  • Invited lecture (Conferences)
    PANDA-Meeting, 20.06.2006, Dresden, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9993

Pulsed ion-beam induced nucleation and growth of Ge nanocrystals on SiO2

Stepina, N. P.; Dvurechenskii, A. V.; Armbrister, V. A.; Kesler, V. G.; Novikov, P. L.; Gutakovskii, A. K.; Kirienko, V. V.; Smagina, Z. V.; Groetzschel, R.

Pulsed low-energy (200 eV) ion-beam induced nucleation during Ge deposition on thin SiO2 film was used to form dense homogeneous arrays of Ge nanocrystals. The ion-beam action is shown to stimulate the nucleation of Ge nanocrystals when being applied after thin Ge layer deposition. Temperature and flux variation was used to optimize the nanocrystal size and array density required for memory device. Kinetic Monte Carlo simulation shows that ion impacts open an additional channel of atom displacement from a nanocrystal onto SiO2 surface. This results both in a decrease in the average nanocrystal size and in an increase in nanocrystal density.

  • Applied Physics Letters 90(2007)13, 33120

Permalink: https://www.hzdr.de/publications/Publ-9992

Dipole strength below and above particle thresholds - new data and new ideas

Grosse, E.

Dipole strength below and above particle thresholds - new data and new ideas

  • Lecture (others)
    WS Nucl. Astrophys., 11.12.2006, Brüssel, Belgien

Permalink: https://www.hzdr.de/publications/Publ-9991

Emergent phenomena in mesoscopic systems

Frauendorf, S.

Emergent phenomena in mesoscopic systems

  • Lecture (Conference)
    Colloquium, National Superconducting Cyclotron Laboraty/Department of Physics, 17.11.2006, Michigan, USA

Permalink: https://www.hzdr.de/publications/Publ-9990

Emergent phenomena in mesoscopic nuclear systems

Frauendorf, S.

Emergent phenomena in mesoscopic nuclear systems

  • Invited lecture (Conferences)
    Key note talk, Mini-symposium on Nuclei as Mesoscopic Systems, The Annual Meeting of the Division of Nuclear Physics of the American Physical Society, 25.-28.10.2006, Nashville, USA

Permalink: https://www.hzdr.de/publications/Publ-9989

A closeup of the spinning nucleus

Frauendorf, S.

A closeup of the spinning nucleus

  • Invited lecture (Conferences)
    Nuclear Structure '06, Conference on nuclei at the limit, Pollard Technology Conference Center, 24.-28.07.2006, Tennessee, USA

Permalink: https://www.hzdr.de/publications/Publ-9988

Dynamical and static chirality of rotating triaxial nuclei

Frauendorf, S.

Dynamical and static chirality of rotating triaxial nuclei

  • Invited lecture (Conferences)
    Contemporary Frontiers in Nuclear Structure, American Chemical Society Meeting & Exposition, 26.-30.03.2006, Atlanta, USA

Permalink: https://www.hzdr.de/publications/Publ-9987

Bioactive composite ceramics in the hydroxyapatite-tricalcium phosphate system

Kubarev, O. L.; Komlev, V. S.; Maitz, M.; Barinov, S. M.

  • Doklady Chemistry 413(2007)1, 72-74

Permalink: https://www.hzdr.de/publications/Publ-9986

Free transverse vibrations of nano-to-micron scale beams

Xu, M.

In the present work, the integral equation approach and the non-local elasticity theory are employed to investigate the free transverse vibrations of nano-to-micron scale beams. The frequency equation is analytically formulated into an eigenvalue problem of a matrix with an infinite order. The numerical calculation is implemented by truncating this matrix to a finite order one. It is found that the impact of the non-local effect on the natural frequencies and vibrating modes is negligible for the beams with micrometre scale length. But when the length of beams reaches the nanoscale, the non-local effect becomes important; especially for the high-order natural frequencies and vibrating modes.

  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 462(2006)2074, 2977-2995

Permalink: https://www.hzdr.de/publications/Publ-9985

Towards bio-inspired metal complexes for targeted radionuclide therapy

Juran, S.

kein Abstrakt verfügbar

  • Lecture (Conference)
    Supraphone meeting 2007, 31.05.-03.06.2007, Lipari, Italy

Permalink: https://www.hzdr.de/publications/Publ-9984

Effect of increase of radiation dose on local control relates to pre-treatment FDG uptake in FaDu tumours in nude mice

Schütze, C.; Bergmann, R.; Yaromina, A.; Hessel, F.; Kotzerke, J.; Steinbach, J.; Baumann, M.; Beuthien-Baumann, B.

Objectives:

To investigate whether heterogeneity in [18F]2-fluoro-2-deoxy-D-glucose (FDG) uptake in a single tumour line, i.e. in tumours with identical genetic background, relates to radiation response.

Materials and methods:

Sixty-two human FaDu head and neck squamous cell carcinomas in nude mice with a diameter of 7 mm entered the study. FDG-PET scanning was performed without anaesthesia on an animal PET scanner immediately prior to irradiation in order to determine maximum standardized uptake values (SUVmax). Single dose irradiations of 25 or 35 Gy were applied under normal blood flow conditions using 200 kV X-rays (0.5 mm Cu, ~ 1.2 Gy min-1). The mice
were observed for 120 days after irradiation, experimental endpoint was local tumour control evaluated using the
Kaplan-Meier method.

Results:

Analyzing all 62 animals, tumour control probability after irradiation with 25 Gy was significantly lower than after irradiation with 35 Gy (29% vs. 57%, log rank p = 0.016). Pre-treatment SUVmax values ranged from 0.72 to 3.47, the median SUVmax value was 1.59. In tumours with FDG uptake less than the median SUVmax, local control was 37% after 25 Gy vs. 47% after 35 Gy (p = 0.37). In contrast, substantial differences in local tumour control were found in tumours with FDG uptake above the median SUVmax (24% vs. 71%, p = 0.006). Multivariate Cox analysis revealed a significant decrease of hazard of recurrence with increasing dose and SUVmax.

Conclusions:

An increase of radiation dose had a greater effect on local control in FaDu tumours with higher FDG uptake than in tumours with lower FDG uptake. This supports the hypothesis that pre-treatment FDG-PET may provide
useful information for heterogeneous radiation dose prescription in subvolumes of tumours of individual patients. As only one tumour model was studied and single doses were applied, confirmatory investigations using further tumour models and fractionated radiotherapy are warranted.

Keywords: (18F]FDG; Positron emission tomography; Irradiation; Squamous cell carcinoma; Human tumour xenografts; Local tumour control

Permalink: https://www.hzdr.de/publications/Publ-9983

DNA-Backbone Dynamics Studied by Time-Resolved Infrared Spectroscopy

Fahmy, K.

DNA-Backbone Dynamics Studied by Time-Resolved Infrared Spectroscopy

  • Lecture (Conference)
    Inst. of Education and Research, 12.12.2006, Pune, India

Permalink: https://www.hzdr.de/publications/Publ-9982

Emittance Compensation of a Superconducting RF Photoelectron Gun by a Magnetic RF Field

Janssen, D.; Volkov, V.

For compensation of transverse emittance in normal conducting RF photoelectron guns a static magnetic field is applied. In superconducting RF guns the application of a static magnetic field is impossible. Therefore we put instead of a static field a magnetic RF field (TE - mode) together with the corresponding accelerating mode into the superconducting cavity of the RF gun. For a 3 _ cell cavity of the superconducting gun with frequencies f = 1.3GHz for the accelerating mode and f = 3.9 GHz for the magnetic mode and a bunch charge of 1 nC a transversal emittance of 0.5 mm mrad has been obtained. In this case the maximal field strength on the axis were Ez = 50 MV/m for the accelerating mode and Bz = 0.34 T for the magnetic mode.(This corresponds to Bs(max) = 0.22T on the surface of the cavity). Possibilities for the technical realization (input of RF power for the TE mode, tuning of two frequencies in one cavity, phase stability) are discussed.

  • Contribution to proceedings
    9th European Particle Accelerator Conference EPAC 2004, 05.-09.07.2004, Lucerne, Switzerland
    Contributions to the Proceedings, 9th European Particle Accelerator Conference EPAC 2004, MOPKF014, 92-9083-231-2, 330-332

Permalink: https://www.hzdr.de/publications/Publ-9981

Molecular switching in GPCRs: FTIR- and Fluorescence-Spectroscopyic Identification of Functional Modules in Rhodopsin

Fahmy, K.

Molecular switching in GPCRs: FTIR- and Fluorescence-Spectroscopyic Identification of Functional Modules in Rhodopsin

  • Lecture (Conference)
    Inst. of Technology Madras, 07.12.2006, Chennai, India

Permalink: https://www.hzdr.de/publications/Publ-9980

Der weiterbildende Masterstudiengang "Medical Radiation Sciences" an der TU Dresden

Enghardt, W.

Der weiterbildende Masterstudiengang "Medical Radiation Sciences" an der TU Dresden

  • Invited lecture (Conferences)
    Technische Fachhochschule Berlin, 12.12.2006, Berlin, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9979

Präzisionsbestrahlung auf der Basis biologischer Daten

Enghardt, W.

Präzisionsbestrahlung auf der Basis biologischer Daten

  • Invited lecture (Conferences)
    Präzisionsbestrahlung auf der Basis biologischer Daten, 07.01.2006, Leipzig, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9978

In-beam PET in der Hadronentherapie

Enghardt, W.

In-beam PET in der Hadronentherapie

  • Invited lecture (Conferences)
    37. Jahrestagung der Deutschen Gesellschaft für Medizinische Physik, 21.09.2006, Regensburg, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9977

Application of the SUSA and CIAU methods to the calculation of a NPP start-up experiment using a coupled code system

Kliem, S.; Bousbia Salah, A.; Rohde, U.; D’Auria, F.

The modeling of complex transients in Nuclear Power Plants (NPP) remains a challenging topic for Best Estimate three-dimensional coupled code computational tools. This technique is, nowadays, extensively used since it allows decreasing conservatism in the calculation models and performs more realistic simulating and more precise consideration of multidimensional effects under complex transients in NPPs. Therefore, large international activities are in progress aiming to assess the capabilities of coupled codes and the new frontiers for the nuclear technology that could be opened by this technique. In the current paper a contribution to the assessment and validation of coupled code technique through the Kolzoduy VVER100 pump trip test is performed. For this purpose, the coupled REALP5/3.3-PARCS/2.6 code is used. The code results were assessed against experimental data and the overall data comparison shows good agreements between the calculations and the global kinetic and thermal-hydraulic aspects observed experimentally. Further investigations through the use of two “antagonist” GRS and the CIAU methods, in order to evaluate and quantify the origin of the observed discrepancies. It was revealed on one hand that relative error quantification discrepancies exist between the two approaches, and on the other hand deviations between code predictions and measurements are mainly due to the used models for evaluating and modeling of the Doppler feedback effect.

  • Lecture (Conference)
    First Workshop on OECD Benchmark for Uncertainty Analysis Modeling, 10.-11.05.2007, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-9976

Der postgraduale Masterstudiengang "Medical Radiation Sciences" und die Ausbildung von Medizinphysik-Experten in Dresden

Enghardt, W.

Der postgraduale Masterstudiengang "Medical Radiation Sciences" und die Ausbildung von Medizinphysik-Experten in Dresden

  • Invited lecture (Conferences)
    12. Jahrestagung der Deutschen Gesellschaft für Radioonkologie (DEGRO), 27.05.2006, Dresden, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9975

Visionen der Medizinphysik

Enghardt, W.

Visionen der Medizinphysik

  • Invited lecture (Conferences)
    12. Jahrestagung der Deutschen Gesellschaft für Radioonkologie (DEGRO), 25.05.2006, Dresden, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9974

DYN3D/ATHLET Calculations of Exercise 2 – Influence of Coolant Mixing on the Power Behaviour

Kliem, S.; Kozmenkov, Y.; Höhne, T.; Rohde, U.

The results of the basic solution of the V1000 coolant transient benchmark obtained by means of the coupled code system DYN3D/ATHLET are compared to a variation calculation, where the coolant mixing is simulated using the CFD code CFX-5.

  • Lecture (Conference)
    V1000CT5 Workshop, 07.05.2007, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-9973

Der postgraduale Masterstudiengang "Medical Radiation Sciences" in Dresden

Enghardt, W.

Der postgraduale Masterstudiengang "Medical Radiation Sciences" in Dresden

  • Invited lecture (Conferences)
    XVIII. Winterschule der DGMP, 14.03.2006, Pichel, Österreich

Permalink: https://www.hzdr.de/publications/Publ-9972

The Control System of Strahlungsquelle ELBE at Forschungszentrum

Leege, K.-W.

Technisches Seminar, DESY Zeuthen, 13.03.2007 Zeuthen

Keywords: Control System of Strahlungsquelle ELBE

  • Invited lecture (Conferences)
    The Control System of Strahlungsquelle ELBE at Forschungszentrum, 13.03.2007, Zeuthen, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-9971

Second Dynamic AER Benchmark – Comparison of results

Kliem, S.; Rohde, U.

A three-dimensional hexagonal dynamic benchmark describing the ejection of a peripheral control rod in a VVER-440 core with neutron kinetics and simple adiabatic Doppler feedback. The initially critical reactor experiences a power excursion without any reactor scram. Nodal solutions are compared to a reference solution obtained with the fine mesh diffusion code CRONOS2.

  • Lecture (Conference)
    Annual Meeting of the AER Working Group D, 08.-09.05.2007, Paris, France

Permalink: https://www.hzdr.de/publications/Publ-9970

WP1: Development of PET/CT for oncology

Enghardt, W.

WP1: Development of PET/CT for oncology

  • Lecture (others)
    BioCare Meeting, EU FP6 Integrated Project Biocare, 08.-09.05.2006, Dresden, Dtl.

Permalink: https://www.hzdr.de/publications/Publ-9969

In-beam PET for radiotherapy monitoring

Enghardt, W.

In-beam PET for radiotherapy monitoring

  • Invited lecture (Conferences)
    Conf. on Clinical and Experimental Research in Radiation Oncology, 24.01.2006, Les Menuires, France

Permalink: https://www.hzdr.de/publications/Publ-9968

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