“…When the mass transfer coefficient outside of the hollow fibers was measured, water was made to flow outside them at flow rates of 4.20-117 cm 3 /s with a rotary pump (MBP107, Senko Medical Instrument Mfg., Tokyo), and nitrogen gas flowed inside the hollow fibers at a rate of 5.00 cm 3 /s. Under these conditions, the water-side (liquid side) resistance limits the oxygen transfer across the membrane [7]. The temperature of the flowing water was maintained at 293 K. The oxygen partial pressure in water at the module inlet and outlet was measured using the dissolved oxygen meter, which is equipped with a blood gas analyzer (860 W, Bayer Medical, Tokyo).…”