Abstract: The invention relates to a method for increasing the dosing precision of microfluidic pumps and valves based on a flexible cover film/diaphragm and a valve trough, in which the surface of the diaphragm facing the valve trough is heated with a laser beam.

Abstract: A device and method for the individual dosing or drainage of small quantities of liquids or gases in microreactors and microreactor arrays, having a membrane and an outlet to a reaction chamber or a reactor arranged therebelow, which is surrounded by an area which forms a fluid line with the membrane, wherein the area or the membrane has an annular elevation which can be arranged around the outlet.

Abstract: A microfluidic chip includes a functional area, which is covered by a flexible or deformable cover. The cover has an expansion limiter. This expansion limiter can for example be embodied as a stable plate including one or more than one opening. The expansion limiter may be fixedly connected to the cover.

Abstract: A device and method for the individual dosing or drainage of small quantities of liquids or gases in microreactors and microreactor arrays, haying a membrane and an outlet to a reaction chamber or a reactor arranged therebelow, which is surrounded by an area which forms a fluid line with the membrane, wherein the area or the membrane has an annular elevation which can be arranged around the outlet.

Abstract: Disclosed are a method and a device for feeding and/or discharging fluids in microreactor arrays through one or several fluid ducts that extend into each individual microreactor and can be individually controlled and regulated, in order to control, regulate, influence, and/or verify processes. The fed or discharged amounts of fluid are introduced into or discharged from the volume of the reaction liquid during a continuous shaking process and are evenly mixed as a result of the shaking process. The continuous shaking process causes sufficient mass transfer and thorough mixing of the reaction partners or fluids while the reaction is not limited or restricted by the mass transfer conditions.

Abstract: A microreactor with at least one cavity, which comprises a bottom, a side wall and an opening disposed opposite the bottom, has a cross-section intersecting the side wall parallel to the bottom, the cross-section having a shape diverging from a round, square or rectangular shape.