TY - JOUR A1 - Eichler, Thorsten A1 - Isecke, Bernd A1 - Klein, H.-H. A1 - Schade, A. A1 - Pruckner, F. A1 - Michel, S. T1 - Kathodischer Korrosionsschutz von Stahl in Beton - Instandsetzung des Parkhauses "Am Gericht" in Frankfurt am Main N2 - Die Instandsetzung von Stahlbetonbauteilen bzw.-werken, welche durch chloridinduzierte Korrosion der Bewehrung gefährdet oder bereits geschädigt sind, hat in den letzten Jahrzehnten weltweit an Bedeutung gewonnen. Der kathodische Korrosionsschutz, als elektrochemisches Instandsetzungsverfahren, bildet in diesem Fall eine zuverlässige und oftmals kostengünstige Methode zur Instandsetzung. Am Beispiel des Parkhauses Am Gericht in Frankfurt am Main werden die Durchführung solch einer Maßnahme sowie die Besonderheiten des Verfahrens beschrieben. Es werden die theoretischen Hintergründe erläutert und die praktische Umsetzung sowie zu klärende Detailfragen beschrieben. Die Daten der ersten Depolarisationsmessungen zeigen den aktuellen Zustand der Anlage sowie des Schutzobjektes. KW - Stahlbeton KW - Kathodischer Korrosionsschutz KW - Korrosion KW - Lochkorrosion KW - Instandsetzung KW - Elektrochemische Verfahren PY - 2007 SN - 0005-9900 SN - 1437-1006 VL - 102 IS - 5 SP - 310 EP - 320 PB - Ernst CY - Berlin AN - OPUS4-14769 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klein, H.-H. A1 - Schade, A. A1 - Eichler, Thorsten A1 - Pruckner, F. T1 - Parkhaus "Am Gericht" in Frankfurt am Main - Eine Sanierung mit kathodischem Korrosionsschutz N2 - Parkhäuser haben nach mehreren Jahrzehnten der Nutzung häufig Sanierungsbedarf in Bezug auf die tragende Stahlbetonkonstruktion, die durch eingedrungene Chloride aus eingeschlepptem Tausalz und die hierdurch hervorgerufene Korrosion der Bewehrung in der Tragfähigkeit erheblich beeinträchtigt sein kann. Das Verfahren des kathodischen Korrosionsschutzes kann hier als elektrochemisches Instandsetzungsverfahren eine wirtschaftliche und zuverlässige Alternative zu herkömmlichen Sanierungsverfahren bieten. Voraussetzungen sind intensive Voruntersuchungen, die Kenntnis der sinnvollen Anwendungsgrenzen des Systems, eine qualitativ hochwertige bauliche Umsetzung des Systems und die Nutzung der Möglichkeiten der Überwachung des Instandsetzungserfolges durch Monitoring, was am Beispiel des Parkhauses Am Gericht in Frankfurt am Main erläutert wird. Parking garage Am Gericht in Frankfurt am Main - a refurbishment with cathodic corrosion protection. After several decades in use a refurbishment is often necessary for the bearing structure of reinforced concrete parking garages due to chlorides, which have been brought into concrete by road salt, and the resulting corrosion of the reinforcement, which may lead to a serious decrease of the bearing capacity. With the system of the cathodic protection of the reinforcement exists a cost-effective and reliable technique as an alternative to common solutions. An intensive investigation of the structure, the knowledge of the reasonable limits of the system, excellent design and execution of the construction work and the monitoring of the working system are nevertheless required, which is illustrated by the example of the parking garage Am Gericht in Frankfurt am Main. KW - Stahlbeton KW - Kathodischer Korrosionsschutz KW - Korrosion KW - Lochkorrosion KW - Instandsetzung KW - Elektrochemische Verfahren PY - 2007 DO - https://doi.org/10.1002/bate.200710040 SN - 0932-8351 SN - 1437-0999 SN - 0005-6820 SN - 0341-1052 SN - 0932-6359 SN - 0932-8351 VL - 84 IS - 7 SP - 465 EP - 476 PB - Ernst & Sohn CY - Berlin AN - OPUS4-17871 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Rabin, Ira A1 - Hahn, Oliver A1 - Wolff, Timo A1 - Kindzorra, Emanuel A1 - Masic, A. A1 - Schade, U. A1 - Weinberg, G. ED - Dik, J. ED - Gunneweg, J. ED - Adriaens, A. T1 - Characterization of the writing media of the Dead Sea scrolls KW - Dead Sea scrolls KW - Parchment KW - Carbon ink KW - XRF KW - FTIR KW - SEM PY - 2010 SN - 978 90 04 18152 6 SN - 0169-9962 IS - Chapter 9 SP - 123 EP - 134 PB - Brill CY - Leiden, The Netherlands AN - OPUS4-21238 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Marchetti, Barbara A1 - von Chrzanowski, Lars A1 - Beckmann, Jörg A1 - Röseler, A. A1 - Schade, U. T1 - THz Spectroscopy to derive the optical constants of liquids N2 - THz stand-off detection of explosives and other hazardous liquids in public areas becomes more and more relevant and with it the knowledge of their optical properties. We present here both the results of THz transmission spectroscopy measurements and spectroscopic ellipsometry measurements on liquids and their mixtures. T2 - IRMMW-THz 2010 - 35th International conference on infrared, millimeter, and terahertz waves CY - Rome, Italy DA - 2010-09-05 KW - THz Spectroscopy KW - Optical constants KW - Liquids PY - 2010 SN - 978-1-4244-6656-6 DO - https://doi.org/10.1109/ICIMW.2010.5612487 SP - 1 EP - 2 AN - OPUS4-22045 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Chowdhary, S. A1 - Schmidt, R. F. A1 - Sahoo, A. K. A1 - tom Dieck, T. A1 - Hohmann, T. A1 - Schade, B. A1 - Brademann-Jock, Kerstin A1 - Thünemann, Andreas A1 - Netz, R. R. A1 - Gradzielski, M. A1 - Koksch, B. T1 - Rational design of amphiphilic fluorinated peptides: evaluation of self-assembly properties and hydrogel formation N2 - Advanced peptide-based nanomaterials composed of self-assembling peptides (SAPs) are of emerging interest in pharmaceutical and biomedical applications. The introduction of fluorine into peptides, in fact, offers unique opportunities to tune their biophysical properties and intermolecular interactions. In particular, the degree of fluorination plays a crucial role in peptide engineering as it can be used to control the characteristics of fluorine-specific interactions and, thus, peptide conformation and self-assembly. Here, we designed and explored a series of amphipathic peptides by incorporating the fluorinated amino acids (2S)-4-monofluoroethylglycine (MfeGly), (2S)-4,4-difluoroethylglycine (DfeGly) and (2S)-4,4,4-trifluoroethylglycine (TfeGly) as hydrophobic components. This approach enabled studying the impact of fluorination on secondary structure formation and peptide self-assembly on a systematic basis. We show that the interplay between polarity and hydrophobicity, both induced differentially by varying degrees of side chain fluorination, does affect peptide folding significantly. A greater degree of fluorination promotes peptide fibrillation and subsequent formation of physical hydrogels in physiological conditions. Molecular simulations revealed the key role played by electrostatically driven intra-chain and inter-chain contact pairs that are modulated by side chain fluorination and give insights into the different self-organization behaviour of selected peptides. Our study provides a systematic report about the distinct features of fluorinated oligomeric peptides with potential applications as peptide-based biomaterials. KW - Small-angle X-ray scattering KW - SAXS KW - Amyloid PY - 2022 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-553504 DO - https://doi.org/10.1039/D2NR01648F SN - 2040-3364 VL - 14 IS - 28 SP - 10176 EP - 10189 PB - Royal Society of Chemistry AN - OPUS4-55350 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schade, U. A1 - Puskar, L. A1 - Golnak, R. A1 - Veber, A. A1 - Beckmann, Jörg T1 - Infrared Attenuate Total Reflection Cell with a Functionalized Surface N2 - ATR cell utilizing chips from silicon wafers is discussed. The cell can be used for wet-chemical analysis on functionalized surfaces. Here, silicon chips are exemplarily "functionalized" by silica layers to provide a hydrophilic or hydrophobic ATR surface in-situ. T2 - 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) CY - Montreal, Quebec, Canada DA - 17.09.2023 KW - THz radiation KW - ATR KW - FTIR PY - 2023 DO - https://doi.org/10.1109/IRMMW-THz57677.2023.10298918 SP - 1 PB - IEEE CY - New York, NY AN - OPUS4-59326 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schade, U. A1 - Ritter, E. A1 - Bawagan, A.D.O. A1 - Beckmann, Jörg A1 - Aziz, E. F. T1 - Far-infrared absorption measurements on thin polymer films N2 - Interference fringes in the far-infrared spectra of thin films are the result of the coherent adding up of waves and can influence the spectral interpretation by concealing smaller features. A number of methods have been developed in order to eliminate such oscillating features from the transmittance spectrum. The paper critically evaluates the total transmission-reflection technique and applies the method to quantify the spectra of different polymer films. T2 - IRMMW-THz 2014 - 39th International conference on infrared, millimeter, and terahertz waves CY - Tucson, Arizona, USA DA - 14.09.2014 KW - Far-infrared spectra KW - Thin films KW - Total transmission reflection technique KW - Infrared spectroscopy KW - Light absorption KW - Light reflection KW - Polymer films KW - Far-infrared absorption measurements KW - Thin polymer films KW - Interference fringes KW - Spectral interpretation KW - Transmittance spectrum KW - Oscillating features KW - Total transmission-reflection technique KW - Interference KW - Absorption KW - Finite impulse response filters KW - Optical films KW - Optical reflection PY - 2014 UR - http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6956145&isnumber=6955975 SN - 978-1-4799-3877-3 DO - https://doi.org/10.1109/IRMMW-THz.2014.6956145 IS - IEEE Catalog No.: CFP14IMM-ART SP - 1 EP - 2 AN - OPUS4-32700 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -