Mathias Reufer

TL;DR: The current standard model of how bacteria propelled by rotary helical flagella swim through concentrated polymer solutions postulates bacteria-sized pores, allowing them relative easy passage is overturned, and clear evidence for non-Newtonian effects in the highest-molecular-weight PVP solution is found.

TL;DR: A fast, high-throughput method for characterizing the motility of microorganisms in three dimensions based on standard imaging microscopy by analyzing the spatiotemporal fluctuations of the intensity in the sample from time-lapse images and obtaining the intermediate scattering function of the system.

TL;DR: The theory for applying differential dynamic microscopy to probe the dynamics of anisotropic colloidal samples such as various ordered phases, or particles interacting with an external field, is developed and demonstrated on a dilute aqueous dispersion of an isotropic magnetic particles aligned in a magnetic field.

TL;DR: The microaerophilic magnetotactic bacterium Magnetospirillum gryphiswaldense swims along magnetic field lines using a single flagellum at each cell pole, and the magnetic moment is determined using a to the authors' knowledge new method and found to be consistent with parameters emerging from quantitative fitting of trajectories to the model.

TL;DR: In this article, the synthesis of hematite cubes and spindle type particles with large aspect ratios such as 7.7 × 7.5 cm has been studied, and it has been shown that a moderate magnetic field (2-12mT) is sufficient to orient the particles.