摘要:
The invention concerns a device for lysis (1) of micro-organism to release at least one intracellular biological constituent, comprising a container (2) wherein are present a biological sample, in liquid medium, containing the micro-organism to be lyzed, and a material in the form of particles, relatively hard and inert with respect to the sample. The invention also concerns a grinding method. The material in the form of particles comprises at least two types of grinding means into different dimensions: at least large dimension magnetic means (3) automatically controlled by a magnetic field; and at least small dimension means (4) actuated by the large dimension grinding means (3). The invention is useful for separating biological constituents.
摘要:
An apparatus including at least one sonotrode (2) designed to generate ultrasound of variable power in at least one biological sample (5) containing cells to be lysed, the sample (5) being contained in at least one receptacle (4 or 10) such that the sonotrode (2) is in direct contact with the receptacle(s) (4). Also disclosed is a method for using ultrasound to lyse a biological sample (5) contained in a receptacle (4), which includes placing the receptacle (4) in direct contact with the sonotrode (2), and activating the sonotrode (2) for long enough to lyse the cells in the sample (5) but preserve the DNA and/or RNA molecules released for subsequent operations, e.g. amplification. The invention is particularly applicable in the discipline of molecular biology.
摘要:
A reaction card (1) having a body, a front surface (62) and a rear surface (63) defined by an edge (68), at least one inlet (2, 3, 4 and/or 5) and at least one outlet (7and/or 8), connected by a network of channels (64) constituting at least one reaction path for at least one fluid which is directed via valves (11to 36 and/or 61); each valve includes a flexible film (67) which can be deformed to allow fluid passage, the film being fixed on the card's rear surface at a peripheral indentation of an assembly of channels associated with the valve; the card includes channels flush with at least one of its surfaces, the channels being of two different cross-sections, a small cross-section serving as a reaction compartment; each front or rear surface is delimited by at least one film (48, 49, 65, 66 and/or 67).
摘要:
The invention relates to an electrically-opened micro fluid-valve. The inventive valve comprises: at least one planar support (12); at least one afferent microchannel (14); at least one efferent microchannel (16), said microchannels being arranged in the support (12); such that at least one of the ends (141 and 161) thereof touch the inner face (121) of the support close to one another; at least one deposit (18) of a heat-sensitive material which is disposed on the inner face (121) of the support (12); and at least one heating means (20). According to the invention, the aforementioned deposit (18) of heat-sensitive material at least partially seals the space separating the ends (141 and 161) of the microchannels (14 and 16), thereby preventing same from intercommunicating. When the temperature of the above-mentioned heating means (20) is raised, the structure of the heat-sensitive material is altered, thereby at least partially opening the ends of the microchannels an the space therebetween, in order to enable communication between said microchannels and to restore the flow of the fluid.
摘要:
The invention concerns the technical field of micro-actuators used for mechanical, chemical, electrical or thermal functions in microsystems, for microelectronic applications such as chips, or biomedical functions such as microfluidics integrating cards. The invention concerns a micro-actuator comprising a so-called main chamber, made in a solid support and containing a so-called main pyrotechnic charge, the main chamber being sealed and delimited by solid support walls and by a deformable membrane, such that the gases emitted by the combustion of the main pyrotechnic charge, enable the volume of the chamber to be increased by deforming the membrane while maintaining intact the solid walls of the main chamber. The invention is characterized in that it comprises means for evacuating the gases from the main chamber.
摘要:
The invention relates to a device for the electrical initiation of at least one pyrotechnic microcharge (3), this device being characterized in that it comprises a support element having at least one conductive finger (6) connected to a first terminal of a central control unit (8), a second terminal of said central control unit (8) being intended to be electrically connected to an electrically conductive support for the pyrotechnic microcharge (3). The invention also relates to a microactuator (1, 1a, . . . , 1h) and a microsystem (1′) that use such an initiation device.
摘要:
The invention relates to a microsystem and a method for fabricating a microsystem. The pyrotechnic microsystem (7, 1′) comprises a substrate having at least two separate electrical initiation zones, each of which provides separate electrical initiation of a pyrotechnic material deposited on the substrate. This microsystem (7, 1′) is characterized in that the same pyrotechnic material deposit (721, 721′, 13) covers both initiation zones, said deposit (721, 721′, 13) produced on the substrate having a thickness sufficiently small for the initiation of the pyrotechnic material in the initiation zone to remain localized and not propagate to the other initiation zone, but sufficient to generate a specific gas quantity.
摘要:
The invention relates to a device for the electrical initiation of at least one pyrotechnic microcharge (3), this device being characterized in that it comprises a support element having at least one conductive finger (6) connected to a first terminal of a central control unit (8), a second terminal of said central control unit (8) being intended to be electrically connected to an electrically conductive support for the pyrotechnic microcharge (3). The invention also relates to a microactuator (1, 1a, . . . , 1h) and a microsystem (1′) that use such an initiation device.
摘要:
The present invention relates to an electrically openable microfluidic valve, which comprises: at least one plane support (12); at least one afferent microchannel (14); at least one efferent microchannel (16); said microchannels being provided in the support, so that at least one of their ends (141) and (161) opens onto the internal face (121) of said support (12), near one another; at least one deposit (18) of a heat-sensitive material laid out on the internal face (121) of the support (12); and at least one heating means (20); so that the deposit (18) of heat-sensitive material at least partly closes off the space separating the ends (141) and (161) of the microchannels (14) and (16), thus preventing the latter from communicating with one another; the increase in temperature by the heating means (20) resulting in a modification of the structure of the heat-sensitive material, thus at least partially clearing the ends of the microchannels and the space between the latter, so as to allow communication between said microchannels and to restore flow of the fluid.
摘要:
The invention relates to a microsystem and a method for fabricating a microsystem. The pyrotechnic microsystem (7, 1′) comprises a substrate having at least two separate electrical initiation zones, each of which provides separate electrical initiation of a pyrotechnic material deposited on the substrate. This microsystem (7, 1′) is characterized in that the same pyrotechnic material deposit (721, 721′, 13) covers both initiation zones, said deposit (721, 721′, 13) produced on the substrate having a thickness sufficiently small for the initiation of the pyrotechnic material in the initiation zone to remain localized and not propagate to the other initiation zone, but sufficient to generate a specific gas quantity.