Improve Cell Growth with New Baffled Flasks

When cultivating microorganisms in Erlenmeyer flasks on a vibrating board, the oxygen intake is frequently the limiting factor for cell growth.

In standard Duran® Erlenmeyer flasks, a liquid sickle forms, the size of which depends on the speed of the board and the vibration diameter. The larger the surface of the content, the larger is the gas exchange surface and with it the possible oxygen intake.

The speed and the associated oxygen intake only increase in a limited manner. The new Duran Erlenmeyer flask with four baffles on the bottom interrupts the laminar flow to create a turbulent flow. The surface of the
liquid and the gas exchange surface are increased, so that the oxygen intake can be increased. Laboratory tests showed that the oxygen intake could be doubled due to the chi-canes in contrast with the standard Duran
Erlenmeyer flasks.

Due to completely automated machine manufacturing, the Erlenmeyer flasks with bafles from the Duran Group are geometrically reproducible.

The wall thickness of the flasks has been increased to achieve excellent mechanical strength and to guarantee a long product service life. The special manufacturing process means it is possible to manufacture the product complete with threading in a two-stage process. Hence the flasks can be sealed with the proven membrane cap from the Duran Group. This enables reproducible gas exchange in contrast with other closure options, such as sealing with cotton wadding or similar. The cap can be reused many times.