undurchlässiges

Undurchlässiges is a German adjective meaning impermeable or impervious. It describes a material or substance that does not allow fluids, gases, or other substances to pass through it. This property is crucial in many applications where containment or protection is required.

In geology, undurchlässiges layers in the earth's strata are important for forming aquifers and controlling groundwater flow. For instance, a layer of clay can be undurchlässiges, preventing water from percolating further down and thus creating an impermeable barrier. This is essential for the storage and availability of groundwater.

In engineering and manufacturing, undurchlässiges materials are used to create barriers. This includes waterproof coatings, sealants, and packaging materials designed to prevent leakage or contamination. For example, an undurchlässiges container will keep its contents from escaping and prevent external substances from entering.

The concept of undurchlässiges is also relevant in biology, particularly in cell membranes. Cell membranes are selectively permeable, but certain components or processes can make them effectively undurchlässiges to specific molecules, regulating the passage of substances in and out of cells. The term can also be used metaphorically to describe someone or something that is unreceptive to new ideas or influences.