TY - CONF A1 - Berger, Georg A1 - Steinhauser, E. A1 - Willmann, G. A1 - Liesner, C. A1 - Willems, U. A1 - Grössl, H. T1 - Biokompatible Werkstoffe - Ersatzteile für Menschen T2 - Podiumsdiskussion zur Materialica 2000 CY - München, Deutschland DA - 2000-09-26 PY - 2000 AN - OPUS4-918 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Berger, Georg A1 - Mensing, M. A1 - Sittinger, M. A1 - Gross, U. A1 - Rahmanzadeh, R. A1 - Müller-Mai, C. ED - Haas, N. P. T1 - Autologe Chondrozyten Transplantation durch Tissue Engineering auf resorbierbaren bioaktiven Biomaterialträgern T2 - 64. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie CY - Hannover, Deutschland DA - 2000-09-10 PY - 2000 SN - 3-540-67734-8 SN - 0945-1382 N1 - Serientitel: Hefte zur Zeitschrift "Der Unfallchirurg" – Series title: Hefte zur Zeitschrift "Der Unfallchirurg" IS - 282 SP - 1(?) PB - Springer CY - Berlin AN - OPUS4-948 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Knabe, C. A1 - Gildenhaar, Renate A1 - Berger, R. A1 - Ostapowicz, W. A1 - Fitzner, R. A1 - Radlanski, R. A1 - Gross, U. A1 - Siebert, G. T1 - In vitro examination of novel calcium phosphates using osteogenic cultures T2 - 5th World Biomaterials Congress CY - Toronto, Canada DA - 1996-05-29 KW - In-vitro Untersuchung KW - Kalzium-Phosphat KW - Zahnersatz KW - Knochen PY - 1996 VL - 1 SP - 890 CY - Toronto AN - OPUS4-672 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Knabe, C. A1 - Stiller, M. A1 - Kampschulte, M. A1 - Wilbig, Janka A1 - Peleska, B. A1 - Günster, Jens A1 - Gildenhaar, R. A1 - Berger, G. A1 - Rack, A. A1 - Linow, U. A1 - Heiland, M. A1 - Rendenbach, C. A1 - Koerdt, S. A1 - Steffen, C. A1 - Houshmand, A. A1 - Xiang-Tischhauser, L. A1 - Adel-Khattab, D. T1 - A tissue engineered 3D printed calcium alkali phosphate bioceramic bone graft enables vascularization and regeneration of critical-size discontinuity bony defects in vivo N2 - Recently, efforts towards the development of patient-specific 3D printed scaffolds for bone tissue engineering from bioactive ceramics have continuously intensified. For reconstruction of segmental defects after subtotal mandibulectomy a suitable tissue engineered bioceramic bone graft needs to be endowed with homogenously distributed osteoblasts in order to mimic the advantageous features of vascularized autologous fibula grafts, which represent the standard of care, contain osteogenic cells and are transplanted with the respective blood vessel. Consequently, inducing vascularization early on is pivotal for bone tissue engineering. The current study explored an advanced bone tissue engineering approach combining an advanced 3D printing technique for bioactive resorbable ceramic scaffolds with a perfusion cell culture technique for pre-colonization with mesenchymal stem cells, and with an intrinsic angiogenesis technique for regenerating critical size, segmental discontinuity defects in vivo applying a rat model. To this end, the effect of differing Si-CAOP (silica containing calcium alkali orthophosphate) scaffold microarchitecture arising from 3D powder bed printing (RP) or the Schwarzwalder Somers (SSM) replica fabrication technique on vascularization and bone regeneration was analyzed in vivo. In 80 rats 6-mm segmental discontinuity defects were created in the left femur. KW - Additive Manufacturing KW - Bio active ceramic KW - In-vivo KW - Alcium alkali phosphate PY - 2023 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-584555 DO - https://doi.org/10.3389/fbioe.2023.1221314 SN - 2296-4185 VL - 11 SP - 1 EP - 20 PB - Frontiers SA CY - Lausanne AN - OPUS4-58455 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ecker, Klaus A1 - Wätjen, U. A1 - Berger, Achim A1 - Persson, L. A1 - Pritzkow, Wolfgang A1 - Radtke, Martin A1 - Riesemeier, Heinrich T1 - RBS, SY-XRF, INAA and ICP-IDMS of antimony implanted in silicon - A multi-method approach to characterize and certify a reference material N2 - A layer of Sb atoms, implanted with an energy of 400 keV and a nominal dose of 5×1016 atoms/cm2 into a high purity silicon wafer, was certified for its areal density (atoms/cm2) using Rutherford backscattering spectrometry (RBS), instrumental neutron activation analysis (INAA) and inductively coupled plasma isotope dilution mass spectrometry (ICP-IDMS) and for its isotope ratio using INAA and ICP-IDMS. Excellent agreement between the results of the different independent methods was found. In the present work, the measurements of the homogeneity of the areal density of Sb, previously determined with RBS in spots having 1 mm diameter, are improved with synchrotron X-ray fluorescence analysis: Higher precision in even smaller sample spots allows to estimate a reduced inhomogeneity of the whole batch of samples of the order of only 0.4%. Thus the uncertainty of the certified value can further be reduced. Down to fractions of a chip with 0.3×0.4 mm2 area, the areal density is now certified as (4.81±0.06)×1016 Sb atoms/cm2, where the expanded uncertainty 0.06 (coverage factor k=2) corresponds to only 1.2%. The relative merits of the different analytical methods are discussed. KW - Certified reference material KW - RBS KW - INAA KW - ICP-IDMS KW - XRF KW - SY-XRF PY - 2002 DO - https://doi.org/10.1016/S0168-583X(01)01038-2 SN - 0168-583X SN - 1872-9584 VL - 188 IS - 1-4 SP - 120 EP - 125 PB - Elsevier CY - Amsterdam AN - OPUS4-13870 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Illerhaus, Bernhard A1 - Badde, Aurelia A1 - Michaelis, Matthias A1 - Berger, U. A1 - Onel, Yener A1 - Meinel, Dietmar A1 - Goebbels, Jürgen T1 - Einsatz von mobilen Röntgenuntersuchungsmethoden im Museum - Zwei Fallbeispiele N2 - Zwei Bildhauermodelle aus dem Georg-Kolbe-Museum Berlin standen zur Restaurierung an. Das kleinere, 'Lucino' (1920), 41cm, wurde hochauflösend mit CT gemessen, da mittels CT sowohl der Herstellungsprozeß einer Gipsstatue als auch der innere Zustand, wie Ergänzungen, Klebungen und Armierungen, festgestellt werden können. Aus den CT Bildern ergab sich eine für die vorher vermutete Gipszusammensetzung ungewöhnliche innere Struktur. Mit einer Freihand bedienten Röntgenpistole zur Messung der Röntgenfluoreszenz wurde daraufhin die Zusammensetzung des Materials der Statuette als Terracotta bestimmt. Durch den Einsatz von Helium als Spülmittel konnten auch leichte Materialien nachgewiesen und so eine Unterscheidung zwischen Gips und gebranntem Ton durchgeführt werden. Aus den CT Daten wurde eine virtuelle Darstellung der äußeren Geometrie gewonnen. Ein damit versuchsweise erstelltes Replik (Rapid Prototyping, 3D-Drucker, TU-Berlin) entsprach nicht den Anforderungen des Museums zur Erstellung einer Gußform für eine Bronzekleinserie der Statuette. Die zweite Statue, die 'Große Nacht' (1930) ist mit ihrer Größe von 2,12m und aufgrund des durch korrodierende Metallarmierung verursachten Schadensbildes nicht mehr transportfähig. Eine in-situ Untersuchung mit dem mobilen Tomographen, der in den 1980ern zur Untersuchung von Bäumen gebaut und jetzt mit einem modernen Flachdetektor und einer Röntgenröhre ausgestattet ist, wird vorgestellt. Die Möglichkeiten acder in-situ CT für große Skulpturen werden anhand der Ergebnisse diskutiert. T2 - DGZfP-Jahrestagung 2010 CY - Erfurt, Deutschland DA - 10.05.2010 KW - Mobile CT KW - Mobile RFA PY - 2010 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-246956 UR - https://www.ndt.net/?id=10149 SN - 978-3-940283-26-9 VL - 122 SP - 1 EP - 8 PB - Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP) CY - Berlin AN - OPUS4-24695 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Ecker, K. H. A1 - Wätjen, U. A1 - Berger, Achim A1 - Grötzschel, R. A1 - Persson, L. A1 - Pritzkow, W. A1 - Radtke, Martin A1 - Riebe, Gundel A1 - Riesemeier, Heinrich A1 - Vogl, Jochen T1 - Certification of antimony implanted in silicon wafer with a silicon dioxide diffusion barrier - IRMM-302 and BAM-L001 N2 - This Report describes the certification of the reference material antimony implanted in Si/SiO2 intended to be used for calibration of surface and near surface analytical methods. It describes the preparation, homogeneity measurements and the analytical work performed for the certification of both Areal density of antimony Atoms (retained dose) and the isotope amount Ratio as well as giving considerations on the stability of the material. KW - Isotope ratio KW - Areal density KW - Surface analysis PY - 2002 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-355752 SP - 1 EP - 40 PB - Institute for Reference Materials and Measurements CY - Geel, Belgium AN - OPUS4-35575 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Arndt, R.W. A1 - Grosse, C.U, A1 - Maehner, D. A1 - Niederleithinger, Ernst A1 - Taffe, A. A1 - Algernon, D. A1 - Berger, J. A1 - Kessler, S. A1 - Krueger, M. A1 - Kruschwitz, Sabine A1 - Ufermann-Wallmeier, D. A1 - Walther, A. T1 - Non-destructive testing in civil engineering: A memorandum for teaching at German-speaking universities N2 - This contribution summarizes actual developments and draft fundamental teaching topics in the field of nondestructive testing in civil engineering (NDT-CE). It is based on the first memorandum on teaching and research in the field of NDT-CE at German speaking universities and provides an overview of the academic education and highlights possible focuses, especially in teaching but also takes into account noteworthy developments and topics in research in the field of NDT-CE. Suggestions are given for the development and advancement of the teaching curricula in regards to a comprehensive and sound professional education of students in civil engineering and adjacent disciplines. T2 - NDT-CE 2022 CY - Zurich, Switzerland DA - 16.08.2022 KW - Curriculum KW - NDT-CE KW - University KW - Competencies PY - 2022 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-563269 UR - https://www.ndt.net/article/ndtce2022/paper/61547_manuscript.pdf SP - 1 EP - 10 PB - NDT.net AN - OPUS4-56326 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -