摘要:
A device for detecting chemical or biochemical substances in fluids for use in an electrochemical camera. The device includes a first carrier having a sensor array with a plurality of electrochemical sensors. A second carrier includes a porous layer having at least one functional region, in which specifically binding capturing molecules are immobilized. The at least one functional region is arranged directly adjacent to at least one non-functionalized region. Assigned to the at least one functional region and the at least one non-functionalized region are several sensors of the sensor array, for use as the electrochemical camera.
摘要:
A process concentrates nucleic acid molecules to be detected of a sample on a surface, with capture molecules that specifically bind the nucleic acid molecules. A support material has a capture probe that can specifically be linked to the nucleic acid molecules to be detected to give complexes. The support material and the nucleic acid molecules of the sample are incubated to form the complexes. The complexes are moved to the surface. At least one portion of the complexes becomes bound to the capture molecules via the capture probe.
摘要:
Disclosed is an apparatus that is used for detecting liquids or substances from liquids and includes a plunger that has a porous plunger layer which is pressed onto a sensor array. Each sensor of the sensor array is surrounded by elevations which spatially separate the sensors from each other like walls. In at least one embodiment, when the plunger layer is pressed onto the sensor array, the walls are pressed into the pores of the plunger layer. Liquid-tight connections are created between the walls and the plunger layer while liquid remains over the sensors. The liquid can be measured. In at least one embodiment, when there is direct mechanical contact between the plunger layer and the sensors, the liquid over the sensors is located in open pores on the surface of the plunger layer. No liquid flows between the pores and across the walls when pressure is applied to the plunger layer such that closed reaction chambers are created.
摘要:
A cartridge (card) having a system of microchannels and/or microcavities is used for automated DNA or protein analysis. In at least one embodiment, the microchannels or microcavities include geometrical structures for receiving dry reagents. For the purpose of industrial production, the cartridge is produced from a flat card support, e.g., by injection moulding. The reagents are spotted into the open channels, dried and then the channels are sealed by way of a film. A finished cartridge can thus be provided with a test sample and the fully automated measuring sequence can be initiated by inserting said cartridge into a read-out device.
摘要:
The single nucleotide polymorphism analysis involves the utilization of a DNA hybridization process as well as the use of a DNA chip. A liquid DNA sample to be analyzed is guided over a DNA chip in a defined time course. After successful hybridization, the temperature is modified in a defined manner under low stringency conditions such that scavenger/target DNA hybrids are melted, whereby the melting of the scavenger/target DNA hybrids is detected and evaluated according to the temperature. In addition to the DNA chip, at least one device is provided that controls and regulates the temperature, and another device is provided that controls a lateral flow of liquid against the surface of the DNA chip. Factors for matching hybrids and mismatching/single point mismatching hybrids can be detected and evaluated using appropriate measuring device(s).
摘要:
Electrochemical transducer arrays are already known from the prior art. According to the invention, the transducer array is provided with at least one flexible, planar metal substrate on which at least one flexible insulator having a firm connection between the metal surface and the insulator surface is disposed. The metal substrate and the insulator disposed thereon are structured in such a manner as to give metal areas which are electrically insulated the one from the other and which serve as sensor areas. The metal substrate used is self-contained so that the structured metal areas can be contacted from the lower side.
摘要:
A PCR process for DNA amplification with thermocyclisation of the corresponding reagents is disclosed, in which total integration of all substances and process steps is achieved in a closed, single-use unit (so-called cartridge) in which the reagents are stored in a storage-stable form at room temperature. According to the process, the water-soluble reagents are covered by a water-insoluble medium, then the DNA to be amplified is supplied and the water-insoluble medium is eliminated, so that the water-soluble reagents are dissolved and PCR can start. In the corresponding arrangement, a test unit designed as a single-use produce (a so-called cartridge) has at least one micro-channel or micro-cavity for receiving a PCR reagent. The PCR reagents in the form of a mixture which can be dried at a negligible vapour pressure and forms a storage-stable substance substance at room temperature adhere to the walls of the micro-channel or micro-cavity and form a thin film covered by an insoluble medium.
摘要:
At least one embodiment of the invention relates to an arrangement for thermocyclisation of a substance. At least one embodiment of the invention also relates to a method for the thermocyclisation of a substance, including: the controllable valves automatically close the PCR chamber after the test fluid has been introduced into the PCR-chamber, and the properties for the memory metal or bimetal elements are used for closing the valves when a predetermined temperature has been exceeded. As a result, the mechanical actuator, which is used to actuate the valves, is thermally coupled to the heating/cooling element in order to carry out the thermocyclisation.
摘要:
The method includes binding living cells to magnetic particles, adding them to a sensor array, uniformly distributing over the sensor array, magnetically fixing the magnetic particles having the bound cells over the sensor array, and adding substances to maintain and/or improve the cell vitality to the sensory array, and/or adding substances to worsen the cell vitality to the sensor array. The assembly includes a sensor array composed of sensors, which are designed to be in direct fluidic contact with a fluid, and a device for generating a magnetic field over the sensor array. A layer that comprises magnetic particles and living cells is formed on the sensor array.
摘要:
A process is disclosed for detecting cells in a liquid sample, which includes: i) filtration of the liquid sample through a porous membrane which is suitable for retaining detectable cells, where at least one subregion of a support is configured as transparent supporting body and the membrane is arranged over its area on the transparent supporting body in such a way that detectable cells are retained on at least part of the surface of the membrane and that at least part of the sample liquid passes through the membrane, ii) application of a liquid optical medium which has essentially the same refractive index as the supporting body, and iii) optical measurement of at least a subarea of the membrane in order to detect detectable cells.