Abstract:
An electrostatic inkjet head has first and second electrodes. The first electrode is supported on a substrate and the second electrode is on a diaphragm so that a gap is formed between the first and second electrodes. A drive circuit is connected to the first and second electrodes to apply a voltage or pulse between the electrodes. When a voltage is applied between the electrodes, an electrostatic attraction force is generated between the electrodes. The attraction force displaces the diaphragm toward the substrate. This displacement of the diaphragm is used for the ejection of ink. Also, when the voltage is turned off, opposing central portions of the first and second electrodes define a gap that is greater than that defined by opposing end portions of the first and second electrodes. On the other hand, when the voltage is turned on, the opposing central portions of the first and second electrodes define another gap that is substantially equal to that defined by the opposing end portions of the first and second electrodes.
Abstract:
A surface plasmon resonance fluorescence analysis device emits a light beam to a prism in which a metal film is formed on a prescribed surface while changing an angle of incidence relative to the metal film in a state in which the light beam is totally reflected, measures light generated on a surface of the metal film, determines an angle at which the light beam enters the metal film based on a change in intensity of the measured light, adjusts the emitting direction of the light beam so that the light beam enters the metal film at the determined angle of incidence, and measures fluorescence generated on the surface of the metal film in a state in which the light beam is emitted the adjusted direction.
Abstract:
A surface plasmon resonance fluorescence analysis device emits a light beam to a prism in which a metal film is formed on a prescribed surface while changing an angle of incidence relative to the metal film in a state in which the light beam is totally reflected, measures light generated on a surface of the metal film, determines an angle at which the light beam enters the metal film based on a change in intensity of the measured light, adjusts the emitting direction of the light beam so that the light beam enters the metal film at the determined angle of incidence, and measures fluorescence generated on the surface of the metal film in a state in which the light beam is emitted the adjusted direction.
Abstract:
There are provided a micro mixer capable of efficiently mixing at least two types of liquids in a simple structure and a microfluidic chip provided with the micro mixer. In order to achieve the object, the micro mixer includes a minute passage through which first and second liquids are caused to flow respectively, and a mixing vessel in which a liquid injecting port caused to communicate with the minute passage is provided in a bottom part, and the liquid injecting port is provided in a shifted position from a center of the bottom part in the bottom part. Moreover, the liquid injecting port may be provided in a shifted position from a center line of the mixing vessel.
Abstract:
A microchip capable of sending liquid in a micro flow channel to a predetermined place irrespective of the pressure difference and sending a mixture of two or more liquid masses to a predetermined place even if the channel structure is simple. The microchip comprises an intermediate reservoir portion provided in a micro flow channel and adapted for temporarily holding liquid sent through the micro flow channel. The microchip is characterized in that the intermediate reservoir portion has a side channel, the volume of the intermediate reservoir portion is smaller than the total volume of the liquid sent into the intermediate reservoir portion, the side channel is provided for communication of a micro flow channel on the upstream side of the intermediate reservoir portion with a micro flow channel on the downstream side thereof, and the cross-section area of the side channel is smaller than that of the micro flow channel.
Abstract:
An analyzer for analysis of a specimen in a testing chip that includes a micropump connecting section that is connected with a micropump to take in liquid from the micropump and includes a micro flow channel in which a reagent and the specimen are mixed so as to react with each other, the analyzer including: a mounting section for mounting the testing chip attachably and detachably thereto; a micropump unit that has a testing chip connecting section to be connected with the micropump connecting section of the testing chip which is mounted on the mounting section, and feeds liquid to the testing chip through the testing chip connecting section; and a pressing mechanism that presses the micropump connecting section and the testing chip connecting section against each other, the connecting sections being connected with each other.
Abstract:
Disclosed is a microchip reaction detection system comprising: a microchip comprising a driving liquid injection unit into which a driving liquid for driving a solution is injected and a detection unit on which a substance to be reacted is supported and where the reaction between the substance and the solution is detected; a driving liquid pump for injecting the driving liquid into the driving liquid injection unit; an air pump for injecting a gas into the detection unit; and a control unit for controlling the driving liquid pump so that the driving liquid can be injected into the driving liquid injection unit and also controlling the air pump so that the gas can be injected into the detection unit intermittently in an amount at least effective for pushing away the solution injected in the detection unit while feeding the solution to the detection unit.
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:
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 system including an inspection chip equipped with at least a pump connection having a flow path opening for interconnecting to a micro-pump, a flow path through which a fluid flows, and a fluid mixing section for joining and mixing two or more fluids, and including a system body equipped with at least a base body, a chip connection having a flow path opening for interconnecting to the inspection chip, a micro-pump unit in the base body including micro-pumps in substantially the same shape, a detection processor and a controller for controlling at least the functions of the micro-pump unit and the detection processor, and the joining amount ratio is adjusted to set the mixing ratio of two fluids to be joined in the fluid mixing section to be approximately m:n (not 1:1) by making the drive voltages of the micro-pumps substantially equal to each other.