Abstract: A device for generating bubbles or droplets may include a cavity comprising a first pressurized phase, at least one input capillary of a second phase, and an output capillary coaxially aligned with the at least one input capillary. The opening of the tip of the at least one input capillary has an internal diameter of less than half the internal diameter of the output capillary. The cross section of the cavity may be selected so that, in use, the average speed field in the cavity is quasi-static.

Abstract: A method for encapsulating a compound of interest in a matrix may include preparing a first aqueous solution including the compound of interest and a gelating agent. An oil or oil mixture and a second aqueous solution having a gelation inducing agent are prepared. The first aqueous solution is emulsified in the oil or oil mixture to form an emulsion of aqueous solution droplets in oil. That emulsion is emulsified in the second aqueous solution. The gelation inducing agent from the second aqueous solution is diffused through the oil towards the interface of the oil and the first aqueous solution. Gelation of the gelating agent at the interface forms the matrix, wherein particles are obtained including the matrix composed of the gelified gelating agent and encapsulating the compound of interest.

Abstract: A device for generating bubbles or droplets may include a cavity comprising a first pressurized phase, at least one input capillary of a second phase, and an output capillary coaxially aligned with the at least one input capillary. The opening of the tip of the at least one input capillary has an internal diameter of less than half the internal diameter of the output capillary. The cross section of the cavity may be selected so that, in use, the average speed field in the cavity is quasi-static.

Abstract: The invention relates to a device comprising a body or an enclosure (100) constituting at least one chamber (120, 140) with at least one inlet or fluid intake (16 or 18) and one outlet or delivery port (17) for said fluid, said device comprising at least one moving element serving as a flap (12 or 13) and making it possible to close/open the inlet and/or outlet cyclically, •-characterized in that said moving element (12 or 13) forms a body with at least one part of the body or enclosure (10) that forms the chamber of said device, •-characterized in that the nature and the mass of the moving element are such that they can be subjected to a movement under the action of an outside force.