Abstract: A cell culture system includes a first component having an opening at the bottom, a membrane for diffusing a gas into a liquid by dissolution, an enclosure able to hold a volume of gas that can diffuse into the liquid via the membrane and a drive member for driving the container, the container being inclined at a non-zero angle ? that is less than or equal to 30°. A cell culture system comprising a first component and a second component forming a ring-shaped container and a drive member, the container being inclined at a non-zero angle ? that is less than or equal to 30°. A method using a system of the invention and to an assembly comprising a system of the invention and a liquid containing a species that is to be cultured.

Abstract: A bladeless mixer for mixing a liquid, includes a cylindrical or truncated cone-shaped receptacle having an axis A and a radius R, the radius R being the shortest distance between the axis A and a side wall of the receptacle, the liquid to be mixed being placed in the receptacle and having an exposed surface at a height H measured along axis A; a member for tilting the receptacle such that axis A forms a non-zero-degree angle of up to 30° relative to the vertical direction; a member for imparting a rotational movement to the receptacle along axis A at an angular speed of rotation ?; wherein the aspect ratio H/R of the height H to the radius R and the angular speed of rotation ? are selected such that an inherent mode of inertia of the liquid has an unstable resonance when the receptacle is tilted and rotates.

Abstract: A bladeless mixer for mixing a liquid, includes a cylindrical or truncated cone-shaped receptacle having an axis A and a radius R, the radius R being the shortest distance between the axis A and a side wall of the receptacle, the liquid to be mixed being placed in the receptacle and having an exposed surface at a height H measured along axis A; a member for tilting the receptacle such that axis A forms a non-zero-degree angle of up to 30° relative to the vertical direction; a member for imparting a rotational movement to the receptacle along axis A at an angular speed of rotation ?; wherein the aspect ratio H/R of the height H to the radius R and the angular speed of rotation ? are selected such that an inherent mode of inertia of the liquid has an unstable resonance when the receptacle is tilted and rotates.