Another criterion for evaluating the permeability of plastics to moisture is found in USP24/NF19 chapter 671, "Containers' Permeability." [4] In the section entitled "Single-Unit Containers and ...

Conversely, sandy soils have larger pores and lower tortuosity that facilitate rapid water flow. The National Cooperative Soil Survey identifies the following permeability classes based on soil ...

Permeability is a measure of the ease with which a fluid can flow through a porous medium;it is the inverse of resistance to flow. The permeability of a sample is, therefore, determined by measuring ...