Abstract: A rotatable microfluidic device that comprises a hydrophilic microchannel structure in which there is a) an upstream microcavity I with a liquid outlet I, b) a microconduit I connected to liquid outlet I, and c) a capillary valve I associated with microconduit I. The inlet end of the microconduit is closer to the spin axis than the outlet end of the microconduit. The difference in radial distance between the inlet end and the outlet end of microconduit I is typically ?5%, such as ?10% or ?100% or ?500%, of the difference in radial distance between the uppermost part of the upstream microcavity and liquid outlet I.

Abstract: A microfluidic device (1) comprising a hydrophilic microchannel structure (2) in which there is a functional unit that comprises a microconduit I (17) in which there is an inlet end (16), an outlet end (18), and a capillary stop function I (24) in the form of a local non-wettable surface area (44). The capillary stop function (24) defines a segment of microconduit I (17). Microconduit I (17) is within at least a part of this segment (46) divided into two or more microchannels (42). A part of the non-wettable surface area (44a,b) is associated with an inner wall of each of the microchannels (42).

Abstract: A microfluidic device comprising a hydrophilic microchannel structure in which there is a functional unit that comprises a microconduit which a) is intended for the transportation of liquid aliquots, and b) has an inlet end and an outlet end between which there is a capillary valve I, which preferably is based on the presence of a local non-wettable surface area. Microconduit I further comprises one or more additional capillary valves, typically one. At least one of the additional valves is upstream of capillary valve I, such as at the inlet end of the microconduit.

Abstract: A centrifugal-based microfluidic device (1) that comprises a hydrophilic microchannel structure (2) in which there is a A) a separation microcavity I (4) that comprises i) a liquid inlet I (5), and ii) a liquid outlet I (6) that is at a level below the level of liquid inlet I (5) and above the level of the bottom (8) of the microcavity (4) thereby defining a lower part (4b) and an upper part (4a) of the microcavity (4), and B) a microconduit I (17) that has an inlet end I (16) directly connected to liquid outlet I (6), and an outlet end I (18) that is at a lower level than inlet end I (6). A capillary valve I (24) is associated with microconduit I (17). The flow direction through liquid outlet I (6) is directed upwards and/or liquid outlet I (6) is placed in a downwardly turned part of an inner wall of the separation microcavity (4), and/or the part of microconduit I (17) next to liquid outlet I (6) is directed upwards.

Abstract: A liquid router that comprises an inlet microconduit that branches into two exit microconduits (microconduit I and II) and is present in a microchannel structure of a microfluidic device which is using centrifugal force created by spinning the device about a spin axis for transporting liquid. The router is characterized in comprising a microcavity in which there are: a lower part comprising two exit openings (exits I and II), and an upper part comprising an inlet opening to which the inlet microconduit (3) is connected, and microconduits I and II which are connected to exits I and II, respectively, and stretch from a shorter radial position to a larger radial position relative to the spin axis. Microconduit II has a reduced hydrophilicity (=reduced apparent wettability) compared to microconduit I.

Abstract: A rotatable microfluidic device that comprises a hydrophilic microchannel structure in which there is a) an upstream microcavity I with a liquid outlet I, b) a microconduit I connected to liquid outlet I, and c) a capillary valve I associated with microconduit I. The inlet end of the microconduit is closer to the spin axis than the outlet end of the microconduit. The difference in radial distance between the inlet end and the outlet end of microconduit I is typically ?5%, such as ?10% or ?100% or ?500%, of the difference in radial distance between the uppermost part of the upstream microcavity and liquid outlet I.

Abstract: A centrifugal based microfluidic device that comprises a microchannel structure in which there is a detection microcavity which in the upstream direction is attached to an inlet microconduit for transport of liquid (transport microconduit) to the detection microcavity and which is used for detecting the result of a reaction taking place in the detection microcavity or in a reaction microcavity positioned upstream of the detection microcavity. The detection microcavity comprises a detection microconduit having an inlet part and an outlet part and therebetween an upward or a downward meander.

Abstract: A microfluidic device that comprises several microchannel structures in which there are an inlet port, an outlet port and there between a structural unit comprising a fluidic function. The structural unit can be selected amongst units enabling a) retaining of nl-aliquots comprising constituents which has been defined by mixing of aliquots within the microfluidic device (unit A), b) mixing of aliquots of liquids (unit B), c) partition of larger aliquots of liquids into smaller aliquots of liquids and distributing the latter individually and in parallel to different microchannel structure of the same microfluidic device (unit C), d) quick penetration into a microchannel structure of an aliquot of a liquid dispensed to an inlet port of a microchannel structure (unit D), and e) volume definition integrated within a microchannel structure (unit E).

Abstract: A microfluidic device comprising a hydrophilic microchannel structure in which there is a functional unit that comprises a microconduit which a) is intended for the transportation of liquid aliquots, and b) has an inlet end and an outlet end between which there is a capillary valve I. Microconduit I comprises an upwardly directed section that extends over a part of or over the full length of microconduit I. Capillary valve I is preferably placed in this section.

Abstract: A microfluidic device that comprises several microchannel structures in which there are an inlet port, an outlet port and therebetween a substructure comprising a fluidic function. The device has an axis of symmetry around which the microchannel structures are arranged as two or more concentric annular zones. for an inlet port and an outlet port of the same microchannel structure the inlet port is typically closer to the axis of symmetry than the outlet port. Each microchannel structure comprises a substructure that can retain liquid while the disc is spun around the axis and/or the inlet ports are positioned separate from the paths waste liquid leaving open waste outlet ports will follow across the surface of the disc when it is spun. For the microchannel structures of an annular zones the corresponding substructures are at essentially at the same radial distance while corresponding substructures in microchannel structures of different annular zones are at different radial distances.

Abstract: A microfluidic device (1) comprising a hydrophilic microchannel structure (2) in which there is a functional unit that comprises a microconduit I (17) in which there is an inlet end (16), an outlet end (18), and a capillary stop function I (24) in the form of a local non-wettable surface area (44). The capillary stop function (24) defines a segment of microconduit I (17). Microconduit I (17) is within at least a part of this segment (46) divided into two or more microchannels (42). A part of the non-wettable surface area (44a,b) is associated with an inner wall of each of the microchannels (42).

Abstract: A centrifugal-based microfluidic device (1) that comprises a hydrophilic microchannel structure (2) in which there is a A) a separation microcavity I (4) that comprises i) a liquid inlet I (5), and ii) a liquid outlet I (6) that is at a level below the level of liquid inlet I (5) and above the level of the bottom (8) of the microcavity (4) thereby defining a lower part (4b) and an upper part (4a) of the microcavity (4), and B) a microconduit I (17) that has an inlet end I (16) directly connected to liquid outlet I (6), and an outlet end I (18) that is at a lower level than inlet end I (6). A capillary valve I (24) is associated with microconduit I (17). The flow direction through liquid outlet I (6) is directed upwards and/or liquid outlet I (6) is placed in a downwardly turned part of an inner wall of the separation microcavity (4), and/or the part of microconduit I (17) next to liquid outlet I (6) is directed upwards.

Abstract: A microfluidic device comprising a hydrophilic microchannel structure in which there is a functional unit that comprises a microconduit which a) is intended for the transportation of liquid aliquots, and b) has an inlet end and an outlet end between which there is a capillary valve I, which preferably is based on the presence of a local non-wettable surface area. Microconduit I further comprises one or more additional capillary valves, typically one. At least one of the additional valves is upstream of capillary valve I, such as at the inlet end of the microconduit.

Abstract: A microfluidic device that comprises several microchannel structures in which there are an inlet port, an outlet port and there between a structural unit comprising a fluidic function. The structural unit can be selected amongst units enabling a) retaining of nl-aliquots comprising constituents which has been defined by mixing of aliquots within the microfluidic device (unit A), b) mixing of aliquots of liquids (unit B), c) partition of larger aliquots of liquids into smaller aliquots of liquids and distributing the latter individually and in parallel to different microchannel structure of the same microfluidic device (unit C), d) quick penetration into a microchannel structure of an aliquot of a liquid dispensed to an inlet port of a microchannel structure (unit D), and e) volume definition integrated within a microchannel structure (unit E).

Abstract: Microstructure for fluids provided in a rotatable disc (D) having a U-shaped volume-defining structure (7) connected at its base to an inlet arm of a U-shaped chamber (10).

Abstract: A method for characterizing n components An of n catalytic systems.

Abstract: A microfluidic device that comprises several microchannel structures in which there are an inlet port, an outlet port and there between a structural unit comprising a fluidic function. The structural unit can be selected amongst units enabling a) retaining of nl-aliquots comprising constituents which has been defined by mixing of aliquots within the microfluidic device (unit A), b) mixing of aliquots of liquids (unit B), c) partition of larger aliquots of liquids into smaller aliquots of liquids and distributing the latter individually and in parallel to different microchannel structure of the same microfluidic device (unit C), d) quick penetration into a microchannel structure of an aliquot of a liquid dispensed to an inlet port of a microchannel structure (unit D), and e) volume definition integrated within a microchannel structure (unit E).

Abstract: A microfluidic device that comprises several microchannel structures in which there are an inlet port, an outlet port and there between a structural unit comprising a fluidic function. The structural unit can be selected amongst units enabling a) retaining of nl-aliquots comprising constituents which has been defined by mixing of aliquots within the microfluidic device (unit A), b) mixing of aliquots of liquids (unit B), c) partition of larger aliquots of liquids into smaller aliquots of liquids and distributing the latter individually and in parallel to different microchannel structure of the same microfluidic device (unit C), d) quick penetration into a microchannel structure of an aliquot of a liquid dispensed to an inlet port of a microchannel structure (unit D), and e) volume definition integrated within a microchannel structure (unit E).

Abstract: A microfluidic device that comprises several microchannel structures in which there are an inlet port, an outlet port and there between a structural unit comprising a fluidic function. The structural unit can be selected amongst units enabling a) retaining of nl-aliquots comprising constituents which has been defined by mixing of aliquots within the microfluidic device (unit A), b) mixing of aliquots of liquids (unit B), c) partition of larger aliquots of liquids into smaller aliquots of liquids and distributing the latter individually and in parallel to different microchannel structure of the same microfluidic device (unit C), d) quick penetration into a microchannel structure of an aliquot of a liquid dispensed to an inlet port of a microchannel structure (unit D), and e) volume definition integrated within a microchannel structure (unit E).

Abstract: A liquid router that comprises an inlet microconduit that branches into two exit microconduits (microconduit I and II) and is present in a microchannel structure of a microfluidic device which is using centrifugal force created by spinning the device about a spin axis for transporting liquid. The router is characterized in comprising a microcavity in which there are: a lower part comprising two exit openings (exits I and II), and an upper part comprising an inlet opening to which the inlet microconduit (3) is connected, and microconduits I and II which are connected to exits I and II, respectively, and stretch from a shorter radial position to a larger radial position relative to the spin axis. Microconduit II has a reduced hydrophilicity (=reduced apparent wettability) compared to microconduit I.