Félátereszt

Félátereszt is a Hungarian term that translates to "permeable" or "half-permeable" in English. It describes a material or membrane that allows certain substances to pass through while restricting the passage of others. This selective permeability is a crucial property in various natural and artificial systems.

In biology, cell membranes are often described as semipermeable. They regulate the movement of nutrients, waste products, and ions into and out of cells, maintaining the cell's internal environment. This selective passage is vital for cellular function and survival.

In chemistry and engineering, félátereszt materials are used in processes like filtration and separation. For example, semipermeable membranes are employed in dialysis to remove waste products from blood and in reverse osmosis to purify water by separating it from dissolved salts and impurities. The effectiveness of these applications relies on the precise control over which molecules can cross the membrane.

The degree of permeability can vary significantly depending on the material and the substances involved. Some materials might be highly permeable to water but largely impermeable to larger molecules, while others might allow gases to pass through easily but block liquids. Understanding and controlling this property is fundamental to many scientific and technological advancements.