Figure 7From: The permeability of SPION over an artificial three-layer membrane is enhanced by external magnetic fieldTransepithelial Electrical Resistance. The resistance of MDCK cells cultured on the SIS membrane was measured for a period of seven days. The resisitance increased significantly from day 1 to day 4. After day 4, resistance stabilized and changes were no longer significant. The data confirmed that MDCK cells were at or near confluence on day 4.Back to article page