Abstract: A testing microchip includes a specimen storage section; a reagent storage section; a reaction section; a testing section for a test of a reaction product obtained from the reaction; a liquid feed control section; and a gas bubble trapping structure. The sections are connected continuously by a series of flow channels. The liquid feed control section stops passing of liquid until a liquid feeding pressure reaches a predetermined pressure, and passes the liquid when the liquid feeding pressure becomes higher than the predetermined pressure; and the gas bubble trapping structure traps a gas bubble in the liquid that flows in the flow channel so that the gas bubble does not flow to the downstream side and only the liquid passes to the downstream side. A testing apparatus that performs testing in the testing section of the testing microchip, wherein the testing microchip is attachably and detachably mounted to the apparatus.

Abstract: Disclosed herein is a micro fluid transferring system that comprises a micropump having a chamber, a first fluid transferring portion connected to the chamber, and a second fluid transferring portion connected to the chamber. This system is characterized in that at least one of the first and second fluid transferring portions comprises a pressure absorbing section for absorbing or alleviating a liquid vibrational pressure therein.

Abstract: Disclosed herein is a micro fluid transferring system that comprises a micropump having a chamber, a first fluid transferring portion connected to the chamber, and a second fluid transferring portion connected to the chamber. This system is characterized in that at least one of the first and second fluid transferring portions comprises a pressure absorbing section for absorbing or alleviating a liquid vibrational pressure therein.

Abstract: A micro reactor for inspecting a biological material, comprising: a first substrate on which a minute flow path is formed; a second substrate laminated on the first substrate so as to cover the minute flow path; a detection section provided on the minute flow path formed between the first and second substrates so as to inspect a liquid mixture of a sample and a reagent; (4) an opening section formed at a region on the second substrate corresponding to the detection section so as to irradiate inspection light to the liquid mixture arriving the detection; and (5) a transparent member to cover the opening section.

Abstract: The invention provides gene-inspecting micro-reactor for detecting a bacterial cell wherein flexibility and high sensitivity are secured, low cost by a disposable type is realized, highly accurate detection is possible in a simple structure, and preliminary processing suitable for amplification reaction can be done for specimen efficiently and rapidly. After lysing a bacterial cell in the specimen by bacteriolysis reagent stored in bacteriolysis reagent storage section 3, and after adsorbing bacterial genes on carriers filled in carrier filling section 4, there is conducted preliminary processing for washing and detecting bacterial genes. Further, there are provided a control means that switches the direction of liquid-feeding for a liquid containing bacterial genes fed to carrier filling section 4, a check valve, amplified reagent storage section 7 and a cooling means such as Pertier element that cools reagent mixing section.

Abstract: The object of the present invention is to provide a micro-reactor, equipped with a high-precision liquid feed system of simple structure, capable of high-precision analysis of at least one item. The present invention provides a micro-reactor for biological substance inspection including a sample storage section, a reagent storage section, a sample pre-processing section, a micro-pump connecting section and a branched minute flow path. And a sample pre-processed by the sample pre-processing section is fed into the minute flow path branched off into at least two parts by a micro-pump and a liquid dividing section, and on the downstream side of each of the branched minute flow paths, the sample is fed to a flow path constituting a reaction site, and then to a flow path constituting the detection site, thereby providing simultaneous measurement of a plurality of items of a sample.

Abstract: A fuel cell device has a small and compact structure as a whole. The fuel cell device employs a fuel cell (e.g., direct methanol fuel cell of an MEA structure) using liquid fuel. Diluted liquid fuel is prepared by diluting the liquid fuel (methanol-contained liquid in the case of DMFC) with dilution liquid, and is supplied to the fuel cell. A first pump unit stacked on the fuel cell supplies the diluted liquid fuel to the fuel cell while diluting the liquid fuel by mixing the liquid fuel and the dilution liquid together. A second pump unit stacked on the fuel cell collects liquid (water usable as dilution liquid in DMFC) produced by an electrochemical reaction in the fuel cell.

Abstract: A micro-reactor is provided with a flow jointing section to joint flows of at least two kinds of liquids including a reacting reagent by feeding the two kinds of liquids with a micro pump; a mixing flow path connected to a downstream end of the flow jointing section so as to diffuse and mix the liquids; and a reaction advancing section to advance the reaction among the mixed liquids.

Abstract: A microfluidic device for performing a test on the reagent includes a fill port formed on the chip to inject the reagent into at least one of the channels, one or more heating portions for performing a test on the reagent injected into the channel, and a micropump. An inside of the micropump and a vicinity of the channel connecting to an inlet and an outlet of the micropump are filled with a drive solution that is driven by the micropump, a gas is sealed between the reagent and the drive solution in the channel to prevent the reagent from contacting the drive solution directly, and the micropump directly drives the drive solution in the forward and backward directions, so that the reagent is repeatedly moved to the test portions through the gas in an indirect manner or is repeatedly passed through the test portions through the gas.

Abstract: A micro-reactor for analyzing a sample, comprises (1) a plate-shaped chip; (2) a plurality of regent storage sections each having a chamber to store respective agents; (3) a regent mixing section to mix plural regents fed from the plurality of regent storage sections so as to produce a mixed reagent; (4) a sample receiving section having an injection port through which a sample is injected from outside; and (5) a reacting section to mix and react the mixed regent fed from the reagent mixing section and the sample fed from the sample receiving section. The plurality of regent storage sections, the regent mixing section, the sample receiving section and the reacting section are incorporated in the chip and are connected through flow paths, and the regent mixing section includes a feed-out preventing mechanism to prevent an initially-mixed regent from being fed out to the reacting section.

Abstract: A method and a device are provided which can mix two liquids faster at a precise mixing ratio. The method for mixing at least two liquids transported in respective channels includes transporting, of the two liquids, a liquid having a low mixing rate intermittently in one of the channels, and transporting, of the two liquids, a liquid having a high mixing rate so as to join the liquid having a low mixing rate from both sides of the channel for the liquid having a low mixing rate.

Abstract: Disclosed herewith is a microchip having a micromixer therein. The mixromixer employs a mixing or extracting structure having (1) a first flow pass provided at a first level of the microchip; (2) a second flow pass provided at a second level of the microchip, which is different from the first level; (3) a third flow pass having a plurality of sub flow passes separately layered at the first level and each having a first end and second end thereof, each sub flow pass being connected to one of the first and second flow passes at the first end thereof; and (4) a fourth flow pass, provided at the first level, connected to the second ends of the sub flow passes so that, at least connecting portions between the fourth flow pass and the sub flow passes of the third flow pass, an extending direction of the fourth flow pass is substantially identical to those of the sub flow passes.

Abstract: Disclosed herein is a microchip provided with a specimen flow pass, a reagent flow pass, a confluence flow pass all of which are fine flow passes. The specimen flow pass allows specimen to flow toward one end thereof. The reagent flow pass is connected to that end of the specimen flow pass and allows at least one reagent to flow for reaction with the specimen. The confluence flow pass extends from that end of the specimen flow pass and allows the confluent specimen and reagent to flow. A sensing portion is assigned near or at the confluence flow pass, and the reaction of the specimen and the reagent is capable of being detected or observed there. Further to this, the microchip comprises a force applying means for reciprocally moving the specimen and the reagent at the sensing portion.

Abstract: Disclosed herewith is an extracting structure for incorporating a substance contained in a first liquid into a second liquid. The extracting structure comprises: a channel for allowing the first liquid and the second liquid to flow therein in a form of a layered flow in which first laminar flows of the first liquid and second laminar flows of the second liquid alternately come in contact with each other, wherein the substance in the first laminar flow of the first liquid moves to the second laminar flow of the second liquid through the boundaries between the first laminar flows and the second laminar flows; and a separating section, connected to a lower stream side of the channel, for separating the second liquid from the first liquid. Further, disclosed also herewith is a separating structure for separating a second liquid from the mixture of a first liquid and the second liquid.

Abstract: A microfluidic device is provided in which dead volume is small, response is satisfactory and a channel can be changed easily depending on application of an analysis or a synthesis. The microfluidic device includes pump units each of which has a first joint surface, a pumping mechanism and channels that connect to the pumping mechanism and opens to the first joint surface, and a channel unit having a second joint surface for being detachably joined to the first joint surface and channels that open to the second joint surface and are connectable to the channels of the pump unit. At least one of a material constituting the first joint surface and a material constituting the second joint surface is an elastic material having a self-sealing feature.

Abstract: Disclosed herewith is a microchip having a micromixer therein. The mixromixer employs a mixing or extracting structure having (1) a first flow pass provided at a first level of the microchip; (2) a second flow pass provided at a second level of the microchip, which is different from the first level; (3) a third flow pass having a plurality of sub flow passes separately layered at the first level and each having a first end and second end thereof, each sub flow pass being connected to one of the first and second flow passes at the first end thereof; and (4) a fourth flow pass, provided at the first level, connected to the second ends of the sub flow passes so that, at least connecting portions between the fourth flow pass and the sub flow passes of the third flow pass, an extending direction of the fourth flow pass is substantially identical to those of the sub flow passes.

Abstract: Disclosed herein is a micro fluid transferring system that comprises a micropump having a chamber, a first fluid transferring portion connected to the chamber, and a second fluid transferring portion connected to the chamber. This system is characterized in that at least one of the first and second fluid transferring portions comprises a pressure absorbing section for absorbing or alleviating a liquid vibrational pressure therein.

Abstract: Disclosed herewith is an extracting structure for incorporating a substance contained in a first liquid into a second liquid. The extracting structure comprises: a channel for allowing the first liquid and the second liquid to flow therein in a form of a layered flow in which first laminar flows of the first liquid and second laminar flows of the second liquid alternately come in contact with each other, wherein the substance in the first laminar flow of the first liquid moves to the second laminar flow of the second liquid through the boundaries between the first laminar flows and the second laminar flows; and a separating section, connected to a lower stream side of the channel, for separating the second liquid from the first liquid. Further, disclosed also herewith is a separating structure for separating a second liquid from the mixture of a first liquid and the second liquid.

Abstract: A microchip comprises a flow pass in which a solution containing particles can flow, and a deflection mechanism for deflecting a portion of the particles as the particles flow through the flow pass.

Abstract: A microchip comprises a plurality of supply units capable of supplying a plurality of fluids, a common unit commonly provided for the plurality of supply units, and a flow pass connecting each supply unit and the common unit. The flow pass allows each fluid supplied by each supply unit to flow to the common unit. The dimensions and shape of the flow pass determines the relative timing for each fluid supplied from each supply unit to reach the common unit.