Effect of texturization on microbial inactivation in UV-C treated orange juice: Predictive modeling and analysis of Alicyclobacillus acidoterrestris physiological and morphological changes.

UV-C light is an alternative for preserving clear fruit-based drinks, replacing existing thermal treatments that degrade product quality and are ineffective against some microorganisms, including Alicyclobacillus acidoterrestris, a spoiling agent of concern in the juice sector. Texturizing agents are essential since consumers' preferences for these products strongly depend on the mouthfeel. However, the complexity of the treated texturized system may have an essential influence on UV-C effectiveness.

Sub-THz Characterization of Technical Surfaces for Particle Accelerator Vacuum Chambers.

Coatings play a crucial role in the functionality of vacuum chambers in particle accelerators, serving a dual goal by efficiently facilitating pumping and mitigating electron cloud effects. However, their impact on the surface impedance of the chamber walls raises concerns, potentially affecting the machine performance and imposing limitations on achievable energies and currents. Therefore, an electromagnetic characterization is essential for a comprehensive study of accelerator structures, particularly in the context of the next-generation machines where the demand for extremely short particle bunches accentuates the importance of evaluating material responses in the very-high-frequency region.

Dielectric Response of Different Alcohols in Water-Rich Binary Mixtures from THz Ellipsometry.

We report a study on the hydrogen bonding mechanisms of three aliphatic alcohols (2-propanol, methanol, and ethanol) and one diol (ethylene glycol) in water solution using a time-domain ellipsometer in the THz region. The dielectric response of the pure liquids is nicely modeled by the generalized Debye-Lorentz equation. For binary mixtures, we analyze the data using a modified effective Debye model, which considers H-bond rupture and reformation dynamics and the motion of the alkyl chains and of the OH groups.