Abstract: A microfluidic device includes a first supply channel and a first discharge channel fluidically connected to one another by a first valve. The device also includes a second supply channel and a second discharge channel fluidically connected to one another by a second valve. At least one of the first channels can be fluidically connected to at least one of the second channels by a T-valve. The device also includes a control unit for controlling the valves, the control unit being configured in such a way that a first fluid from one of the first channels and a second fluid in one of the second channels can be laminated in parallel by actuating the valves in one of the first or second channels. A microfluidic system and a method for transporting fluids, and a use thereof are also disclosed.

Abstract: A microfluidic system for a polymerase chain reaction is disclosed. The system includes a substrate having three chambers fluidically connected to one another in series, which chambers are held at different temperature levels. An elastic film on the substrate closes the chambers, wherein the chambers connected to one another in series are fluidically closable at the ends of the serial connection. The film above a chamber is movable into the chamber for emptying of the chamber. Thus, without a separate pump, it is possible for a PCR solution to be pumped through the chambers or temperature levels, with the PCR solution in a chamber acquiring the temperature thereof very rapidly.

Abstract: A microsystem for fluidic applications includes a substrate with a reservoir, a first microchannel, connected to the reservoir, and a second microchannel, separated from the first microchannel by a web. The microsystem furthermore has an elastic film on the substrate, which film has a joint to the substrate around the reservoir and seals the reservoir. Here, the joint has a permanent joining area and, on the web, a web joining area that can be broken open and adjoins the permanent joining area at both ends of the web. Such a microsystem forms a processing chip with reagent receptacle.

Abstract: A method for producing a microfluidic system, containing at least one microfluidic component having at least one microfluidically active surface is disclosed. The method includes providing a microfluidic composite substrate having a connection side, comprising at least one microfluidic component introduced into a polymer composition, wherein the microfluidically active surface of said component forms a part of the connection side of the microfluidic composite substrate. The method further includes providing a mating substrate having a connection side for connection to the microfluidic composite substrate. Also, the method includes providing microfluidic structures at least on the connection side of the composite substrate and/or on the connection side of the mating substrate at least for the purpose of forming a microfluidic channel structure in the microfluidic system.

Abstract: A method for producing a multilayer system with at least two joining elements, these being produced in particular from plastic, is disclosed. The method includes applying a compensating means, for at least partially compensating for mechanical stresses, to a first joining element, applying a second joining element to the compensating means, for joining together the first and second joining elements, firstly connecting the first joining element to the compensating means and secondly connecting the second joining element to the compensating means. A corresponding multilayer system and a corresponding use is also disclosed.

Abstract: A microfluidic system for purposes of analysis and diagnosis is made up of layers arranged substantially one above the other. The microfluidic system includes at least a first and a second conducting-through layer, which respectively comprise at least one channel for a fluid to be conducted through in the respective conducting-through layer. The microfluidic system further includes at least one chip layer, which comprises at least one active, micromechanical element, the active, micromechanical element being in operative connection with at least one of the channels, and the chip layer being arranged between the first and the second conducting-through layer, and the channels being fluidically connected to one another. A corresponding production method is disclosed in addition to the microfluid system.

Abstract: A device and a method for optical parallel analysis of a sample arrangement. The device includes a system of sample areas provided on and/or in a front face of the carrier substrate for receiving a sample substance; a system of detector areas provided on and/or in a back face of the carrier substrate, each detector area being assigned to a corresponding sample area; and a system of optical devices, each optical system being assigned to a corresponding sample area and being designed in such a way that it deflects light beams, which the corresponding sample area in response to an optical excitation does not emit in the direction of a detector area assigned to it, in the direction of the detector area assigned to it and/or in the direction of a detector-free area on the back face of the carrier substrate.

Abstract: A microfluidic cell for the dielectrophoretic separation, accumulation, and/or lysis of polarizable bioparticles, including an interdigital electrode system composed of two electrode groups having interdigitated electrodes, and a micromixer having microchannels and microelevations. The interdigital electrode system and the micromixer are situated on the same side of the cell to improve the separation, accumulation, and/or lysis characteristics. Moreover, also described is a microfluidic system which includes such a microfluidic cell, and use thereof, and a method for separating, accumulating, and/or lysing polarizable bioparticles.

Abstract: A microfluidic cell for the dielectrophoretic separation, accumulation, and/or lysis of polarizable bioparticles, including an interdigital electrode system composed of two electrode groups having interdigitated electrodes, a flat electrode in which the interdigital electrode system and the flat electrode are situated on opposite sides of the cell in order to improve the separation, accumulation and/or lysis characteristics. Moreover, a microfluidic system which includes such a microfluidic cell, and use thereof, and a method for separating, accumulating, and/or lysing polarizable bioparticles is also described.

Abstract: A microfluidic chips (1), microfluidic fluid reservoirs (2), microfluidic kits (1,2) comprising a microfluidic chip (1) and a microfluidic fluid reservoir (2), and to methods of operating such microfluidic kits (1,2). According to the invention, at least either the microfluidic chip (1) or the microfluidic fluid reservoir (2) includes a distensible diaphragm (4) or a distensible wall region, respectively, which is distensible into the fluid reservoir (2), with volume displacement taking place, in order to move a fluid (8) out of the fluid reservoir (2) through the fluid channel inlet (6) into a fluid channel (7) of the microfluidic chip (1).

Abstract: A pinch valve, a chip including a pinch valve of this type, a peristaltic pump including a pinch valve of this type and a method for manufacturing same. The pinch valve includes a first substrate, a second substrate, and a third substrate, the third substrate being farmed from an elastic material and situated between the first and second substrates, the first substrate adjoining the third substrate and having at least one first recess on the side adjacent to the third substrate, the second substrate adjoining the third substrate and having at least one second recess on the side adjacent to the third substrate, the first recess and the second recess being situated at least partially opposite each other.