Publications by authors named "M A Schalk"

Microcarrier-based cell culture is a commonly used method to facilitate the growth of anchorage-dependent cells like MA 104 for antigen manufacturing. However, conventionally, static cell culture is employed for cell propagation before seeding the production bioreactor with microcarriers (MCs). This study demonstrates the effective replacement of the conventional method by serial subculturing on MCs with in situ cell detachment under optimal conditions in closed culture units.

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Chemoresistive gas sensors made from SnO, ZnO, WO, and InO have been prepared by flame spray pyrolysis. The sensors' response to CO and NO in darkness and under illumination at different wavelengths, using commercially available LEDs, was investigated. Operation at room temperature turned out to be impractical due to the condensation of water inside the porous sensing layers and the irreversible changes it caused.

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Negatively-charged boron vacancy centers ([Formula: see text]) in hexagonal Boron Nitride (hBN) are attracting increasing interest since they represent optically-addressable qubits in a van der Waals material. In particular, these spin defects have shown promise as sensors for temperature, pressure, and static magnetic fields. However, their short spin coherence time limits their scope for quantum technology.

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Today's teaching and didactical methods are progressively aiming to integrate digital technologies, computational thinking (CT), and basic computer science concepts into other subjects. An innovative and creative way of combining and integrating CT and teaching cross-curricular skills without digital devices is to include the game Poly-Universe (PolyUni). According to previous research, the game is expected to have a positive effect on visual perceptual progress, including isolation, and the development of shape-background skills.

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Industrial exoskeletons have recently gained importance as ergonomic interventions for physically demanding work activities. The growing demand for exoskeletons is leading to a need for new knowledge on the effectiveness of these systems. The Exoworkathlon, as a prospective study approach, aims to assess exoskeletons in realistic use cases and to evaluate them neutrally in their entirety.

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