TY - JOUR A1 - Baumann, Marcus A1 - Brandini, Frederico A1 - Staubes, Regina T1 - The influence of light and temperature on carbonspecific DMS release by cultures of Phaeocystis antarctica and three antarctic diatoms / Baumann, Marcus E.M. ; Brandini, Frederico ; Staubes, Regina JF - Marine Chemistry. 45 (1994), H. 1-2 Y1 - 1994 SN - 0304-4203 SP - 129 EP - 136 ER - TY - JOUR A1 - Baumann, Marcus A1 - Goeyens, L. A1 - Semeneh, M. A1 - Elskens, M. T1 - Phytoplankton nutrient utilisation and nutrient signature in the Southern Ocean / Goeyens, L. ; Semeneh, M. ; Baumann, M.E.M. ; Elskens, M. ; Shopova, D. ; Dehairs, F. JF - Journal of Marine Systems. 17 (1998), H. 1-4 Y1 - 1998 SN - 0924-7963 SP - 143 EP - 157 ER - TY - JOUR A1 - Baumann, Marcus A1 - Gradinger, R. T1 - Distribution of Phytoplankton Communities in Relation to the Large Scale Hydrographical Regime in the Fram Strait 1984 / Gradinger, R. ; Baumann, M.E.M. JF - Marine Biology. 111 (1991), H. 2 Y1 - 1991 SN - 0025-3162 SP - 311 EP - 321 ER - TY - JOUR A1 - Baumann, Marcus A1 - Hirche, H.-J. A1 - Kattner, G. A1 - Gradinger, R. T1 - Plankton distribution and the impact of copepod grazing on primary production in Fram Strait, Greenland Sea / Hirche, H.-J. ; Baumann, M.E.M. ; Kattner, G.; Gradinger, R. JF - Journal of Marine Systems. 2 (1991), H. 3-4 Y1 - 1991 SN - 0924-7963 SP - 477 EP - 494 ER - TY - JOUR A1 - Baumann, Marcus A1 - Jahnke, J. T1 - Chemical and Physical Effects on the Shape and Growth of the Diatom Biddulphia sinensis GREVILLE in Batch Cultures: A Contribution to Bioindication in Plankton Ecology / Jahnke, J. ; Baumann, M. JF - Hydrobiological Bulletin . 17 (1983), H. 1 Y1 - 1983 SN - 0165-1404 SP - 5 EP - 20 ER - TY - JOUR A1 - Baumann, Marcus A1 - Lancelot, C. A1 - Brandini, F. A1 - Sakshaug, E. T1 - The taxonomic identity of the cosmopolitan prymnesiophyte Phaeocystis, a morphological and ecophysiological approach / Baumann, M.E.M. ; Lancelot, C. ; Brandini, F. ; Sakshaug, E. ; John M. JF - Journal of Marine Systems. 5 (1994), H. 1 Y1 - 1994 SN - 0924-7963 SP - 5 EP - 22 ER - TY - JOUR A1 - Baumann, Marcus A1 - Lara, R.J. A1 - Hubberten, D.N. A1 - Thomas, D.N. T1 - Dissolved organic matter studies in enclosed systems: Application of hydophobic fractionation for the assessment of organic nitrogen dynamics / Lara, R.J. ; Hubberten, U. ; Thomas, D.N. ; Baumann, M.E.M. ; Kattner, G. JF - Journal of Marine Systems. 13 (1997), H. 1-4 Y1 - 1997 SN - 0924-7963 SP - 155 EP - 161 ER - TY - JOUR A1 - Baumann, Marcus A1 - Rousseau, V. A1 - Vaulot, D. A1 - Casotti, R. T1 - The life cycle of Phaeocystis (Prymnesiophycae): evidence and hypotheses / Rousseau, V. ; Vaulot, D. ; Casotti, R. ; Cariou, V. ; Lenz, J. ; Gunkel, J. ; Baumann, M. JF - Journal of Marine Systems. 5 (1994), H. 1 Y1 - 1994 SN - 0924-7963 SP - 23 EP - 39 ER - TY - JOUR A1 - Baumann, Marcus A1 - Schwarz, Sonja A1 - Kotliar, Konstantin A1 - Eynatten, Maximilian von A1 - Trucksaess, Arno A1 - Burckhardt, Klaus A1 - Lutz, Jens A1 - Heemann, Uwe A1 - Lanzl, Ines T1 - Non-diabetic chronic kidney disease influences retinal microvasculature JF - Kidney and Blood Pressure Research Y1 - 2009 SN - 1423-0143 VL - 32 IS - 6 SP - 428 EP - 433 PB - - ER - TY - JOUR A1 - Baumann, Marcus A1 - Semeneh, M. A1 - Dehairs, F. A1 - Elskens, M. T1 - Nitrogen uptake regime and phytoplankton community structure in the Southern Ocean / Semeneh, M. ; Dehairs, F. ; Elskens, M. ; Baumann, M.E.M. ; Kopczynska, E.E. ; Lancelot, C. ; Goeyens, L. JF - Journal of Marine Systems. 17 (1998), H. 1-4 Y1 - 1998 SN - 0924-7963 SP - 159 EP - 177 ER - TY - JOUR A1 - Baumann, Marcus A1 - Thomas, D. A1 - Gleitz, M. T1 - Efficiency of carbon assimilation and photoacclimation in a small unicellular Chaetoceros species from the Weddel Sea (Antarctica): Influence of temperature and irridiance / Thomas, D. ; Baumann, M.E.M. ; Gleitz, M. JF - Journal of Experimental Marine Biology and Ecology. 157 (1992), H. 2 Y1 - 1992 SN - 0022-0981 SP - 195 EP - 209 ER - TY - JOUR A1 - Baumann, Marcus A1 - Tillmann, U. A1 - Aletsee, L. T1 - Distribution of Carbon Among Photosynthetic End Products in the Bloom-Forming Arctic Diatom Thalassiosira antarctica COMBER / Tillmann, U. ; Baumann, M.E.M. ; Aletsee, L. JF - Polar Biology. 10 (1989), H. 3 Y1 - 1989 SN - 0722-4060 SP - 231 EP - 238 ER - TY - CHAP A1 - Baumann, T. A1 - Teixeira Boura, Cristiano José A1 - Göttsche, Joachim A1 - Hoffschmidt, Bernhard A1 - O'Connell, B. A1 - Schmitz, S. A1 - Zunft, S. T1 - Air/Sand heat exchanger design and materials for solar thermal power plant applications T2 - SolarPACES 2010 : the CSP Conference: electricity, fuels and clean water from concentrated solar energy ; 21 to 24 September 2010, Perpignan, France Y1 - 2010 SP - 146 EP - 147 PB - Soc. OSC CY - Saint Maur ER - TY - CHAP A1 - Baumann, Torsten A1 - Teixeira Boura, Cristiano José A1 - Eckstein, Julian A1 - Dabrowski, Jan A1 - Göttsche, Joachim A1 - Hoffschmidt, Bernhard A1 - Schmitz, Stefan A1 - Zunft, Stefan T1 - Properties of bulk materials for high-temperature air-sand heat exchangers T2 - 30th ISES Biennial Solar World Congress 2011 : Kassel, Germany, 28 August - 2 September 2011. Vol. 2 Y1 - 2012 SN - 978-1-61839-364-7 SP - 1270 EP - 1278 PB - Curran CY - Red Hook, NY ER - TY - CHAP A1 - Baumann, Torsten A1 - Teixeira Boura, Cristiano José A1 - Göttsche, Joachim A1 - Hoffschmidt, Bernhard A1 - Schmitz, Stefan A1 - Zunft, Stefan T1 - Air-sand heat exchanger: materials and flow properties T2 - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain Y1 - 2011 CY - Granada ER - TY - GEN A1 - Baumgartner, Thomas A1 - Wunderlich, Florian A1 - Jaunich, Arthur A1 - Sato, Tomoo A1 - Bundy, Georg A1 - Grießmann, Nadine A1 - Kowalski, Julia A1 - Burghardt, Stefan A1 - Hanebrink, Jörg T1 - Lighting the way: Perspectives on the global lighting market Y1 - 2012 CY - McKinsey ET - 2nd ed. ER - TY - JOUR A1 - Baumgartner, Werner A1 - Fidler, Florian A1 - Weth, Agnes A1 - Habbecke, Martin A1 - Jakob, Peter A1 - Butenweg, Christoph A1 - Böhme, Wolfgang T1 - Investigating the locomotion of the sandfish in desert sand using NMR-Imaging JF - PLOS ONE N2 - The sandfish (Scincus scincus) is a lizard having the remarkable ability to move through desert sand for significant distances. It is well adapted to living in loose sand by virtue of a combination of morphological and behavioural specializations. We investigated the bodyform of the sandfish using 3D-laserscanning and explored its locomotion in loose desert sand using fast nuclear magnetic resonance (NMR) imaging. The sandfish exhibits an in-plane meandering motion with a frequency of about 3 Hz and an amplitude of about half its body length accompanied by swimming-like (or trotting) movements of its limbs. No torsion of the body was observed, a movement required for a digging-behaviour. Simple calculations based on the Janssen model for granular material related to our findings on bodyform and locomotor behaviour render a local decompaction of the sand surrounding the moving sandfish very likely. Thus the sand locally behaves as a viscous fluid and not as a solid material. In this fluidised sand the sandfish is able to “swim” using its limbs. KW - magnetic resonance imaging KW - body limbs KW - swimming KW - lizards KW - deserts Y1 - 2008 U6 - http://dx.doi.org/10.1371/journal.pone.0003309 SN - 1932-6203 VL - 3 IS - 10 PB - Plos CY - San Francisco, California, US ER - TY - THES A1 - Bayer, Robin T1 - Development of a novel in-vitro vascular model for determination of physiological and pathophysiological mechanobiology Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:38-362212 N1 - Dissertation, Universität zu Köln, 2021 PB - Universität zu Köln CY - Köln ER - TY - CHAP A1 - Bayer, Robin A1 - Hescheler, Jürgen A1 - Artmann, Gerhard A1 - Temiz Artmann, Aysegül ED - Staat, Manfred ED - Erni, Daniel T1 - Treating arterial hypertension in a cell culture well T2 - 3rd YRA MedTech Symposium 2019 : May 24 / 2019 / FH AachenW N2 - Hypertension describes the pathological increase of blood pressure, which is most commonly associated with the increase of vascular wall stiffness [1]. Referring to the “Deutsche Bluthochdruck Liga” this pathology shows a growing trend in our aging society. In order to find novel pharmacological and probably personalized treatments, we want to present a functional approach to study biomechanical properties of a human aortic vascular model. In this method review we will give an overview of recent studies which were carried out with the CellDrum technology [2] and underline the added value to already existing standard procedures known from the field of physiology. Herein described CellDrum technology is a system to measure functional mechanical properties of cell monolayers and thin tissue constructs in-vitro. Additionally, the CellDrum enables to elucidate the mechanical response of cells to pharmacological drugs, toxins and vasoactive agents. Due to its highly flexible polymer support, cells can also be mechanically stimulated by steady and cyclic biaxial stretching. Y1 - 2019 SN - 978-3-940402-22-6 U6 - http://dx.doi.org/10.17185/duepublico/48750 SP - 5 EP - 6 PB - Universität Duisburg-Essen CY - Duisburg ER - TY - JOUR A1 - Bayer, Robin A1 - Temiz Artmann, Aysegül A1 - Digel, Ilya A1 - Falkenstein, Julia A1 - Artmann, Gerhard A1 - Creutz, Till A1 - Hescheler, Jürgen T1 - Mechano-pharmacological testing of L-Type Ca²⁺ channel modulators via human vascular celldrum model JF - Cellular Physiology and Biochemistry N2 - Background/Aims: This study aimed to establish a precise and well-defined working model, assessing pharmaceutical effects on vascular smooth muscle cell monolayer in-vitro. It describes various analysis techniques to determine the most suitable to measure the biomechanical impact of vasoactive agents by using CellDrum technology. Methods: The so-called CellDrum technology was applied to analyse the biomechanical properties of confluent human aorta muscle cells (haSMC) in monolayer. The cell generated tensions deviations in the range of a few N/m² are evaluated by the CellDrum technology. This study focuses on the dilative and contractive effects of L-type Ca²⁺ channel agonists and antagonists, respectively. We analyzed the effects of Bay K8644, nifedipine and verapamil. Three different measurement modes were developed and applied to determine the most appropriate analysis technique for the study purpose. These three operation modes are called, particular time mode" (PTM), "long term mode" (LTM) and "real-time mode" (RTM). Results: It was possible to quantify the biomechanical response of haSMCs to the addition of vasoactive agents using CellDrum technology. Due to the supplementation of 100nM Bay K8644, the tension increased approximately 10.6% from initial tension maximum, whereas, the treatment with nifedipine and verapamil caused a significant decrease in cellular tension: 10nM nifedipine decreased the biomechanical stress around 6,5% and 50nM verapamil by 2,8%, compared to the initial tension maximum. Additionally, all tested measurement modes provide similar results while focusing on different analysis parameters. Conclusion: The CellDrum technology allows highly sensitive biomechanical stress measurements of cultured haSMC monolayers. The mechanical stress responses evoked by the application of vasoactive calcium channel modulators were quantified functionally (N/m²). All tested operation modes resulted in equal findings, whereas each mode features operation-related data analysis. Y1 - 2020 U6 - http://dx.doi.org/10.33594/000000225 SN - 1421-9778 VL - 54 SP - 371 EP - 383 PB - Cell Physiol Biochem Press CY - Düsseldorf ER -