Technically, many of these materials are only vapor retarders as they have varying degrees of permeability.

As a result, dentin has a degree of permeability which can increase the sensation of pain and the rate of tooth decay.

"We have to establish a precise degree of permeability for the membrane of the alta-mist cells," M'Benga said.

The fragmentation of the state, and the relative autonomy of its constituent agencies, also depends on the degree of permeability of the state to the interests of civil society.

Ligeti here considers Palestrina's music as having "perhaps the lowest degree of permeability" because its handling of consonance and dissonance was the most sensitively defined of all historical styles.

No, this creature, which has fabric skins of different degrees of permeability that can be changed to simulate different perspiration rates, is meant for testing fabrics and clothing under extreme conditions of temperature and activity.

The grain size, shape and distribution of the foundry sand, the type and quantity of bonding materials, the density to which the sand is rammed, and the percentage of moisture used for tempering the sand are important factors in regulating the degree of permeability.