Abstract: The present invention relates to a valve unit for a microfluid system comprising a first and a second fluid reservoir, a flow chamber, a fluid channel array and a conveying means, said first fluid reservoir being, via the flow chamber, in fluidic communication with the second fluid reservoir through the fluid channel array, wherein the valve unit can be brought from a first state to a second state so that, in said first state, a fluid can be conveyed by the conveying means from said first fluid reservoir through the flow chamber in a predetermined direction of flow into the second fluid reservoir, and so that, in said second state, a fluid can be conveyed by the conveying means from said second fluid reservoir through the flow chamber in a predetermined direction of flow into the first fluid reservoir.

Abstract: The invention relates to polymer substrates which are provided with fluorescence features and in which photochemical fluorescence features, i.e. fluorescent structures, are produced by UV irradiation. Thus, fluorophores can be produced in polymer substrates with a low inherent fluorescence by means of suitable UV radiation, which fluorophores display a marked and detectable emission upon being excited with light of a suitable wavelength. If such an irradiation is implemented in a structured manner, emission patterns can be produced in this way in polymer substrates, which emission patterns can be applied for example as recovery grids in fluorescence microscopy. A further application field relates to product authentication which is made possible by the polymer substrates according to the invention provided with fluorescence features.

Abstract: The invention relates to a method of positioning an organic, biological and/or medical specimen in a desired surface region of a specimen carrier, whereby a magnet device is provided, comprising the steps joining the specimen with one or a plurality of magnetic, in particular paramagnetic particles, arrangement of the magnet device relative to the specimen carrier so that a desired magnetic field arrangement is provided in a predetermined region of the specimen carrier, introduction of the specimen into the specimen carrier and arrangement of the specimen in the desired surface region with the aid of the magnet device.

Abstract: The invention relates to a method of positioning an organic, biological and/or medical specimen in a desired partial region of a specimen carrier, comprising the steps arrangement of a gel in a partial region of the specimen carrier, polymerisation or gelification of the gel, by means of which a polymerised gel is obtained, whereby the polymerised gel at least partially, in particular horizontally, delimits the desired partial region and introduction of the specimen into the specimen carrier, in particular into the desired partial region of the specimen carrier.

Abstract: The present invention relates to a sample chamber for a liquid, wherein at least one part in the interior of the sample chamber comprises a fluid-absorbent and/or fluid-permeable plastic, which is essentially degasified in at least one area and/or in which a predetermined fluid and/or predetermined solid is stored in soluble form in at least one area.

Abstract: The invention relates to a sample chamber for testing samples, comprising a bottom plate and a cover plate connected thereto, a sample reservoir for receiving a liquid and/or a sample to be tested, and a contact electrode which is arranged entirely in the bottom plate, in the cover plate or between the bottom plate and the cover plate and which is electrically conductively connected to a conductor element or semiconductor element disposed in and/or on the sample chamber, wherein the bottom plate and/or the cover plate are designed in such a way that an electrical contact with the contact electrode can be established from the outside in such a way that an electrically conductive connection to the conductor element or to the semiconductor element can be established from the outside through the bottom plate or through the cover plate via the contact electrode.

Abstract: The invention relates to a device for microfluid analyses for a substrate with plane base surface and cover surface, wherein a chamber is integrated in the substrate for receiving liquid with at least two admissions and a semipermeable or permeable membrane is arranged in the chamber, wherein the chamber is subdivided by the membrane into two sectional chambers with at least one admission each.

Abstract: A flow chamber (1) made of plastics as an object carrier for light-microscopic examinations comprised at least one channel (4) in a base plate (2), said channel having a width of 0.01 to 20 mm and a height of 0.01 to 5 mm. One liquid reservoir (3, 3?) each is connected to the inlet and outlet opening (6, 6?) of the channel, whereby a communicating system is generated. The bottom and/or the cover of this chamber is made of a high-class plastic material and may be functionalized. The inlet and outlet portions of the channel may be formed by a rounding (7) of the channel edges or by a surface treatment in a manner that drop formation is prevented and the flow is therefore not obstructed.

Abstract: The invention relates to a specimen carrier for the study of cell growth, comprising a substrate with a reservoir with a bottom, wherein the reservoir is filled up to a predetermined height of the side wall, which is smaller than the complete height of the reservoir, with a carrier material for cell growth and the side wall of the reservoir is formed such that a predetermined contact angle of the carrier material can be adjusted with respect to the side wall.