The macroporous membranes (« breathing » membranes) enable to control gaseous exchanges between a closed space and the exterior.
For example, a macroporous membrane may have a significant influence on internal environmental conditions (temperature, relative humidity, pressure) of a motoring electronic calculator, it-self placed in the motor compartment of a car. A precise modeling of transfers allows a representation of the evolution of internal environmental parameters versus external environmental variations.
Another example concerns the closed vessel equipped with a breathing membrane, designed for cellular culture to perform new immunological and toxicity tests aimed to replace in vivo tests on animals. The main role of membrane is on one hand to facilitate permanent gaseous exchanges needed to cellular breathing (O, CO) and on the other hand to control the loss of the tested aromatic compounds. A 3 D modeling of gaseous and vapor exchanges between the different compartments of the closed space, coupling with the breathing equation for the used mammalian cells (hybridomes souri –souri CRL 1606), was validated by experimental data.