The base of the concussion container null flask whose oxygen uptake efficiency

摘要

PROBLEM TO BE SOLVED: To provide a shaking vessel of high oxygen-absorbing efficiency for mass cultures which is useful even in a high shearing field if the field is oxygen-absorbing rate determined.;SOLUTION: The bottom side of a flask is changed to be a spherical bottom from a flat bottom, so that the area of a liquid membrane generated in the vessel become larger and the liquid free surface area for absorbing oxygen is increased. Then, a feeding amount of liquid can be increased than a conventional round-bottle flask by making the upper part of the flask a cylindrical type, so that a mass treatment is possible. A liquid mixing is suitably maintained without retarding a revolution flow generated in the vessel by making a baffle shape a semi-cylindrical type.;COPYRIGHT: (C)2007,JPO&INPIT