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We derive a lumped circuit model for inductive antenna spin-wave transducers in the vicinity of a ferromagnetic medium. The model considers the antenna's Ohmic resistance, its inductance, as well as the additional inductance due to the excitation of ferromagnetic resonance or spin waves in the ferromagnetic medium. As an example, the additional inductance is discussed for a wire antenna on top of a ferromagnetic waveguide, a structure that is characteristic for many magnonic devices and experiments. The model is used to assess the scaling properties and the energy efficiency of inductive antennas. Issues related to scaling antenna transducers to the nanoscale and possible solutions are also addressed., (© 2022. The Author(s).)

We describe an extension of the micromagnetic finite difference simulation software MuMax3 to solve elasto-magneto-dynamical problems. The new module allows for numerical simulations of magnetization and displacement dynamics in magnetostrictive materials and structures, including both direct and inverse magnetostriction. The theoretical background is introduced, and the implementation of the extension is discussed. The magnetoelastic extension of MuMax3 is freely available under the GNU General Public License v3., Competing Interests: No competing interests were disclosed., (Copyright: © 2021 Vanderveken F et al.)

Four Streptococcus thermophilus strains (Strep. thermophilus BTC, Strep. thermophilus LY03, Strep. thermophilus 480 and Strep. thermophilus Sfi20) have been examined for their exopolysaccharide production capacity. All strains produced a polymer composed of the neutral sugars glucose and galactose, but in different ratios. It was clearly shown that the biosynthesis of exopolysaccharides from Strep. thermophilus LY03 is growth-associated and hence displays primary metabolite kinetics. The monomer ratio of the exopolysaccharide synthesized did not vary throughout the fermentation cycle. The production kinetics and exopolysaccharide yields were strongly dependent on the fermentation conditions. Physical factors such as temperature, pH and oxygen tension as well as chemical factors (medium composition, initial lactose concentration, carbon/nitrogen levels) were of utmost importance.