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 microchip inspection system including: a microchip having at least a target substance and a reagent which is fluorescently labeled and is specifically combined with the target substance, wherein a reaction of the target substance and the reagent is performed and detecting a fluorescence intensity in a detected section of the microchip is performed; a microchip holder; a photo detection section; a reaction start device; and a control section for controlling a reaction start timing of the reaction start device and a detection timing of the fluorescence intensity before and after a reaction by the photo detection section, wherein the control section correlates a detection timing of the fluorescence intensity before the reaction by the photo detection section with the reaction start timing by the reaction start device.
Abstract:
There is described a microchip inspection system, which makes it possible not only to correct the influence of the viscosity change of the liquid, but also to accurately conduct the liquid conveyance controlling operation. The microchip inspection system includes: a micro pump to inject a driving liquid from a liquid flow path into a microchip; a liquid temperature adjusting section to adjust a liquid temperature of the driving liquid; a driving liquid detecting section to detect presence or absence of the driving liquid at two predetermined positions located in the liquid flow path, so as to output detection signals; a fluid velocity calculating section to calculate a fluid velocity based on the detection signals outputted by the driving liquid detecting section; and a liquid temperature controlling section to control the liquid temperature adjusting section, based on the fluid velocity calculated by the fluid velocity calculating section.
Abstract:
A micro total analysis chip including: a main flow chip for feeding a liquid; and a divided flow path for dividing and feeding the liquid at a predetermined division ratio, each divided path of the plurality of divided paths having a high flow path narrower than a preceding part and a subsequent part of the each divided path, wherein a flow portion of a first divided path in the divided paths satisfies and expression of: R×Q>σ×L/S, where, Q is a flow rate of the first divided path, S is a sectional area and L is a sectional circumferential length of a flow path of other divided path of the plurality of divided paths, and σ is a surface tension liquid.
Abstract:
At the joining section where two flow paths join, a reverse flow preventing means is installed in one flow path on the upstream side of the joining section and the flow path resistance of the reverse flow preventing means is set so as to be larger than the overall flow path resistance which is the total flow path resistance of the upstream and downstream sides of the joining section in the other flow path.
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 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 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:
Provided is a microchip which is capable of determining the quantity of the liquid in the chip and dividing the liquid, and has a relatively simple flow passage structure. In the microchip liquid supply system, a portion of the liquid in an upstream passage among the liquid injected into a first flow passage is supplied from a liquid discharge passage by operating a suction pump connected to a liquid supply passage in such a state that an air vent hole is closed. Thereafter, the suction pump is operated with the air vent hole closed, whereby a portion of the liquid in a quantity determination passage among the liquid injected into the first flow passage is supplied from a liquid supply passage.
Abstract:
A microreactor capable of reaction between a sample and a mixed reagent containing a mixture of multiple reagents, which microreactor avoids the interposition of air between driving solution and reagents and realizes high-precision controlling of the timing of mixing of reagents and other liquids, the mixing ratio of liquids, the pressure for liquid feeding, etc. Further, there is provided a method of liquid feeding making use of the same. Accordingly, a flow path branched at the position of an inlet from a flow path through which an opening communicating with an external pump communicates with the inlet is provided with an air evacuation flow path with its terminal open outward. Further, the flow path resistance of the air evacuation flow path for a liquid is made greater than the flow path resistance, for the liquid, of a flow channel from the reagent storage chamber to a reagent feed-out flow path.