TY - JOUR A1 - Breuer, Lars A1 - Raue, Markus A1 - Strobel, M. A1 - Mang, Thomas A1 - Schöning, Michael Josef A1 - Thoelen, R. A1 - Wagner, Torsten T1 - Hydrogels with incorporated graphene oxide as light-addressable actuator materials for cell culture environments in lab-on-chip systems JF - Physica status solidi (a) N2 - Abstractauthoren Graphene oxide (GO) nanoparticles were incorporated in temperature-sensitive Poly(N-isopropylacrylamide) (PNIPAAm) hydrogels. The nanoparticles increase the light absorption and convert light energy into heat efficiently. Thus, the hydrogels with GO can be stimulated spatially resolved by illumination as it was demonstrated by IR thermography. The temporal progression of the temperature maximum was detected for different concentrations of GO within the polymer network. Furthermore, the compatibility of PNIPAAm hydrogels with GO and cell cultures was investigated. For this purpose, culture medium was incubated with hydrogels containing GO and the viability and morphology of chinese hamster ovary (CHO) cells was examined after several days of culturing in presence of this medium. Y1 - 2016 U6 - https://doi.org/10.1002/pssa.201533056 SN - 1862-6300 VL - 213 IS - 6 SP - 1520 EP - 1525 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Dantism, Shahriar A1 - Takenaga, Shoko A1 - Wagner, Patrick A1 - Wagner, Torsten A1 - Schöning, Michael Josef T1 - Determination of the extracellular acidification of Escherichia coli K12 with a multi-​chamber-​based LAPS system JF - Physica status solidi (a) N2 - On-line monitoring of the metabolic activity of microorganisms involved in intermediate stages of biogas production plays an important role to avoid undesirable “down times” during the biogas production. In order to control this process, an on-chip differential measuring system based on the light-addressable potentiometric sensor (LAPS) principle combined with a 3D-printed multi-chamber structure has been realized. As a test microorganism, Escherichia coli K12 (E. coli K12) were used for cell-based measurements. Multi-chamber structures were developed to determine the metabolic activity of E. coli K12 in suspension for a different number of cells, responding to the addition of a constant or variable amount of glucose concentrations, enabling differential and simultaneous measurements. Y1 - 2016 U6 - https://doi.org/10.1002/pssa.201533043 SN - 1862-6300 VL - 213 IS - 6 SP - 1479 EP - 1485 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Bayon, Arnau A1 - Valero, Daniel A1 - Garcia-Bartual, Rafael A1 - Vallés-Morán, Francisco José A1 - López-Jiménez, P. Amparo T1 - Performance assessment of OpenFOAM and FLOW-3D in the numerical modeling of a low Reynolds number hydraulic jump JF - Environmental Modelling & Software N2 - A comparative performance analysis of the CFD platforms OpenFOAM and FLOW-3D is presented, focusing on a 3D swirling turbulent flow: a steady hydraulic jump at low Reynolds number. Turbulence is treated using RANS approach RNG k-ε. A Volume Of Fluid (VOF) method is used to track the air–water interface, consequently aeration is modeled using an Eulerian–Eulerian approach. Structured meshes of cubic elements are used to discretize the channel geometry. The numerical model accuracy is assessed comparing representative hydraulic jump variables (sequent depth ratio, roller length, mean velocity profiles, velocity decay or free surface profile) to experimental data. The model results are also compared to previous studies to broaden the result validation. Both codes reproduced the phenomenon under study concurring with experimental data, although special care must be taken when swirling flows occur. Both models can be used to reproduce the hydraulic performance of energy dissipation structures at low Reynolds numbers. Y1 - 2016 SN - 1364-8152 U6 - https://doi.org/10.1016/j.envsoft.2016.02.018 VL - 80 SP - 322 EP - 335 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Nakagawa, Masaki A1 - Kallweit, Stephan A1 - Michaux, Frank A1 - Hojo, Teppei T1 - Typical Velocity Fields and Vortical Structures around a Formula One Car, based on Experimental Investigations using Particle Image Velocimetry T2 - SAE International Journal of Passenger Cars - Mechanical Systems Y1 - 2016 U6 - https://doi.org/10.4271/2016-01-1611 SN - 1946-4002 ER - TY - CHAP A1 - Wollert, Jörg T1 - Wireless systems for machinery safety : Requirements and solutions for wireless real time systems T2 - 16th International Conference on Research and Education in Mechatronics (REM), 2015 Y1 - 2015 SN - 978-3-945728-01-7 U6 - https://doi.org/10.1109/REM.2015.7380377 SP - 88 EP - 91 ER - TY - CHAP A1 - Butenweg, Christoph A1 - Kleemann, Anne A1 - Altay, Okyay A1 - Renault, Philippe T1 - Simulation of impact-loads on reinforced concrete structural elements T2 - 22nd International Conference on Structural Mechanics in Reactor Technology 2013 : (SMiRT 22) ; San Francisco, California, USA, 18 - 23 August 2013 Y1 - 2013 SP - 1 EP - 10 ER - TY - CHAP A1 - Butenweg, Christoph A1 - Rosin, Julia A1 - Kubalski, Thomas T1 - Seismic response of conventional and base-isolated liquid storage tanks T2 - International Conference on Earthquake Engineering : 29.-31.05.2013, Skopje, Mazedonien Y1 - 2013 SP - 1 EP - 8 ER - TY - CHAP A1 - Gellert, Christoph A1 - Norda, Hannah A1 - Butenweg, Christoph T1 - Nonlinear behaviour of masonry under cyclic loading T2 - 7th European Conference on Structural Dynamics, EURODYN 2008 : 7-9 July 2008, Southampton Y1 - 2008 SP - 1 EP - 12 ER - TY - CHAP A1 - Renault, Philippe A1 - Butenweg, Christoph T1 - Seismic vulnerability assessment of bridges T2 - First Munich Bridge Assessment Conference, MBAC 2005 : Munich, 20.-25. June 2005 Y1 - 2005 SP - 1 EP - 16 ER - TY - CHAP A1 - Butenweg, Christoph A1 - Kuhlmann, Winfried A1 - Lopez, M. A1 - Fernandez, S. T1 - Seismic vulnerability assessment of the Aachen Cathedral based on measurements and numerical simulations T2 - International Conference on Earthquake Engineering to mark 40 years from Catastrophic 1963 Skopje Earthquake, Skopje 2003 Y1 - 2003 SP - 1 EP - 8 ER -