31. In nanofluidics, the active control of ion transport is realized using nano-scale channels or pores. 32. It can serve as a vehicle for studying ion transport limits in dense, nanostructured, electrode arrays. 33. Calbindin is a protein involved in calcium ion transport within cells, and excess calcium in cells is toxic. 34. The most current theory suggests that defective ion transport leads to dehydration in the airway epithelia, thickening mucus. 35. This causes a higher concentration of cAMP in the cell, which disrupts the regulation of ion transport mechanisms. 36. In practice the molar ionic conductivities are calculated from the measured ion transport numbers and the total molar conductivity. 37. Finally, " Xenopus " oocytes are a leading system for studies of ion transport and channel physiology. 38. Furthermore, " Xenopus " oocytes are a leading system for studies of ion transport and channel physiology. 39. They demonstrate high levels of calmodulin, and may be involved in mediating Ca 2 + regulation and ion transport . 40. AdSICs are fast ion conductors that have a crystal structure close to optimal for fast ion transport ( FIT ).