Preservation of cell populations, comprises settling a circular carrier matrix with out-differentiated hepatocyte cells, freezing the settled carrier matrix and rinsing the carrier matrix with addition of protective substance

摘要

The freezing of the carrier matrix (18) is carried out to -100[deg]C for 50 minutes using liquid nitrogen. The carrier matrix; is made of polyurethane fleece; exhibits a integrated capillary membrane (20); has a surface area of 1.25 mm2; and is arranged in a housing that has inlets (22, 26) for bringing liquid and gas medium and outlets for exhausting the liquid and gas medium through the settled carrier matrix. The housing is arranged with other similar housings (12, 14, 16) as a dialysis unit. An independent claim is included for a carrier matrix.