Nietthermische

Nietthermische refers to phenomena in which the primary mechanism of effect is not heating. In science and technology, the term distinguishes processes driven by energy forms other than bulk temperature increases, such as electric or magnetic fields, photons, mechanical stresses, or chemical reactions.

Applications occur across domains. Non-thermal plasma is a partially ionized gas operated at near-room temperature used for surface modification and sterilization. In food processing, non-thermal methods like high-pressure processing, pulsed electric fields, cold plasma, ultraviolet light, or irradiation inactivate microorganisms while preserving sensory and nutritional quality. In medicine and biology, non-thermal effects include photobiomodulation and other radiation effects that influence cellular behavior without substantial heat.

Characterization usually involves measuring energy deposition, temperature change, microbial inactivation, or chemical changes, with the goal of demonstrating minimal bulk heating. The term is not strictly standardized and may vary by discipline; some contexts prefer non-thermal, athermal, or nicht-thermisch equivalents.

Nietthermische approaches provide alternatives to thermal processing, offering potential benefits such as product quality, energy efficiency, and new functionalities, but they also require careful management of localized heating, exposure patterns, and material responses.