Abstract: Various embodiments of systems, methods, and computer programs are disclosed for transferring a conference session with a conferencing system from a first client device to a second client device. One such method comprises: a conferencing system establishing a first conference session for an online conference with a first client device via a communication network; presenting a conference interface via a graphical user interface to the first client device, the conference interface displaying a participant object corresponding to a participant identifier associated with a first participant operating the first client device; the participant initiating a transfer request comprising the participant identifier; sending the transfer request to a second client device; the second client device acknowledging the transfer request; and the second client device establishing a second conference session with the conferencing system using the participant identifier.

Abstract: The present invention concerns a plunging jet bioreactor (1) comprising a mechanism (4), (5) adapted in use to form culture fluid into a hollow flow stream and to introduce into the hollow of the flow stream an oxygen-containing gas. In some embodiments the mechanism comprises concentrically arranged outer (4) and inner tubes (5) wherein the inner tube is in flow communication with the culture fluid container whereby the culture fluid flows over the inner tube to form the hollow flow stream into which the oxygen from the inner tube is introduced.