Abstract:
A centrifugal force-based microfluidic device for nucleic acid extraction and a microfluidic system are provided. The microfluidic device includes a body of revolution; a microfluidic structure disposed in the body of revolution, the microfluidic structure including a plurality of chambers, channels connecting the chambers, and valves disposed in the channels to control fluid flow, the microfluidic structure transmitting the fluid using centrifugal force due to rotation of the body of revolution; and magnetic beads contained in one of the chambers which collect a target material from a biomaterial sample flowing into the chamber, wherein the microfluidic structure washes the magnetic beads which collect the target material, and separates nucleic acid by electromagnetic wave irradiation from an external energy source to the magnetic beads. The microfluidic system includes the microfluidic device; a rotation operating unit which rotates the body of revolution; and an external energy source which irradiates electromagnetic waves.
Abstract:
Provided are a micro-fluidic device having multiple reaction chambers to simultaneously detect a plurality of different analytes, and an analyte detection method using the same. The micro-fluidic device includes multiple reaction chambers containing a plurality of capture materials to be combined with different analytes, multiple channels connecting the multiple reaction chambers, and valves provided within the multiple channels to control fluid flowing through the channels.
Abstract:
A centrifugal force-based microfluidic device in which a sample including particles and a fluid is centrifugally separated such that the separated fluid is quantitatively distributed, and a microfluidic system including the centrifugal force-based microfluidic device are provided. The centrifugal force-based microfluidic device includes a microfluidic structure in which, within a rotatable disc-shaped platform, a sample, including particles and a fluid, is quickly centrifugally separated into the particles and the fluid using the rotation of the disc-shaped platform and the fluid having a certain volume of the separated fluid is discharged by rotation of the disc-shaped platform.
Abstract:
Provided is a rotatable microfluidic device for conducting simultaneously two or more assays. The device includes a platform which can be rotated, a first unit which is disposed at one portion of the platform and detects a target material from a sample using surface on which a capture probe selectively binds to the target material is attached, and a second unit which is disposed at another portion of the platform and detects a target material included in the sample by a different reaction from the reaction conducted in the first unit.
Abstract:
Disclosed is a microfluidic device including a microfluidic structure formed in a platform in which various examinations, such as an immune serum examination, can be automatically performed using the biomolecule microarray chip. The biomolecule microarray chip-type microfluidic device using a biomolecule microarray chip comprises: a platform which is rotatable; a microfluidic structure disposed in the platform, comprising: a plurality of chambers; a plurality of channels connecting the chambers each other; and a plurality of valves controlling flow of fluids through the channels, wherein the microfluidic structure controls flow of a fluid sample using rotation of the platform and the valves; and a biomolecule microarray chip mounted in the platform such that biomolecule capture probes bound to the biomolecule microarray chip contact the fluid sample in the microfluidic structure.
Abstract:
Provided are a centrifugal force based microfluidic device which can automatically perform a dilution operation and a microfluidic system including the same. The centrifugal force based microfluidic device for dilution includes a rotatable disk type platform, a mixing chamber disposed on the platform; a buffer solution storage disposed on a portion of the platform which is closer to a center of the platform than the mixing chamber, connected to the mixing chamber through a channel to supply a predetermined amount of buffer solution to the mixing chamber at least one time, and a plurality of diluted solution chambers which are disposed on a portion of the platform which is farther from the center of the platform than the mixing chamber, are each connected to the mixing chamber through flow paths extended from a middle exit corresponding to a predetermined water level, and sequentially receiving a solution which is serially diluted in the mixing chamber at least one time.
Abstract:
Provided are a valve unit and a reaction apparatus having the valve unit. The valve unit includes a phase transition material, which melts and expands upon an application of the electromagnetic waves to the valve filler, and the valve filler is directed into the channel through the connection passage and closes the channel. The valve unit also includes heat generation particles, which are dispersed in the phase transition material and generate heat upon an application of electromagnetic wave energy.
Abstract:
Disclosed are a blood tester for measurement of temperature of a sample placed in a blood-testing disc using a thermochromic pigment, and a control method thereof. The disclosed blood-testing disc, the blood tester having the blood-testing disc loaded therein, and the control method of the same, are used to measure a light absorbance of the thermochromic pigment in order to determine a temperature of a sample when a biological material such as blood, blood serum, blood plasma, or sputum, is subjected to analysis, so that the test may be executed at a constant temperature. Accordingly, more reproducible and accurate results are obtainable, and temperature measurement of a sample may be simply and effectively attained by an optical analyzer built in the blood tester, without an alternative instrument or sensor for measurement thereof.
Abstract:
A centrifugal force-based microfluidic device for the detection of a target biomolecule and a microfluidic system including the same are provided. The device includes a body of revolution; a microfluidic structure disposed in the body of revolution including chambers, channels connecting the chambers, and valves disposed in the channels to control fluid flow, the microfluidic structures transmitting fluid using centrifugal force due to rotation of the body of revolution; and beads disposed in the microfluidic structures, the beads having capture probes on the surfaces thereof which are selectively bonded with target protein; and a detection probe disposed in the microfluidic structures and selectively bonded to the target protein, and which includes a material required to express an optical signal, wherein the microfluidic structure mixes the beads, biological samples, and the detection probe to react and washes and separates the beads after the reaction.
Abstract:
Provided is a centrifugal force based microfluidic system including: a microfluidic device including a rotatable platform and an optical path formed to extend horizontally in a straight line from a circumference of the platform; a motor rotating so as to control the microfluidic device; a light emitting unit emitting light towards the microfluidic device; a light receiving unit detecting the light emitted from the light emitting unit; and a controller determining a home position to be the position of the microfluidic device at a point of time when the light emitted from the light emitting unit is detected by the light receiving unit, wherein the light emitted from the light emitting unit passes through the optical path to be incident on the light receiving unit only when the microfluidic device is located in a predetermined position.