Permeation is the process by which a substance, such as a gas or liquid, passes through a barrier or material. This process involves the movement of molecules through the microscopic pores or spaces within the barrier. Permeation is a critical concept in various fields, including chemistry, materials science, and engineering, as it influences the behavior and performance of materials in response to external substances. In practical applications, permeation is often discussed in context with membranes, coatings, and filters.
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