Abstract:
A disk-shaped microfluidic apparatus is provided to allow both immune serum test and biochemical test to be carried out simultaneously, thereby reducing the time and effort required for the pathological examination. A disk type microfluidic apparatus(200) comprises a rotatable disk-shaped platform(100); an immune serum test unit which is arranged at the one part of the platform, comprises a plurality of chambers, a plurality of channels connecting the chambers and a plurality of valves controlling the flow of fluid through the channels, and detects the target material from the sample by using a microparticle having a capture probe on surface; and a biochemical test unit(230, 240) which is arranged at the other part of the platform and detects the target material from the sample by the biochemical reaction of the flown sample and the pre-stored reaction solution, wherein the plurality of valves comprises at least one phase transfer valve which comprises a valve material of a heat radiating particle dispersed in a phase transfer material which is solid at a room temperature and is liquid in a high temperature and whose valve material moves in the state molten by the electromagnetic wave irradiated from the external energy source so as to open or close the channels.
Abstract:
A disk type microfluidic device using a microfluidic chip is provided to automatically perform the work using various microfluidic chips within a disk type platform, and to reduce the manual work required in experiment or diagnosis using a microarray chip. A disk type microfluidic device using a biomolecule microarray chip includes a rotatable disk-type platform(100); a microfluidic structure which are arranged within the disk-type platform, includes a plurality of chambers(120,130,140), a plurality of channels(183) connecting a plurality of chambers and a plurality of valves controlling the flow of the fluid through the chambers, and manipulates the fluid sample with the rotation of the disk-shape platform and the valve; and a biomolecule microarray chip(190) mounted on the disk-type platform to contact the biomass capture probe with the sample of the microflow structure.
Abstract:
An optical detection device and method for disk-type microfluidic apparatus use phase-sensitive detection method in order to provide precise information about the optical characteristic of reactant even at the state the darkroom condition is not prepared. An optical detection device using phase-sensitive detection method for disk-type microfluidic apparatus comprisesa rotation driving part(140), a light source, an optical sensor(153), a filter, and a signal processing unit. The rotation driving part stops the detection area of the disk-type microfluidic apparatus in the predetermined location. The light source irradiates the light to the detection area stopped in the predetermined location while flickering at the fixed frequency. The optical sensor is arranged toward the detection area and generates electric signal according to the intensity of the incident light. The filter is arranged on the optical path between the detection area and the optical sensor, and passes the light of the specific band. The signal processing unit receives the signal generated in the optical sensor and outputs only the signal of the same frequency component as the flickering frequency of the light source.
Abstract:
A centrifugal force-based microfluidic system is provided to prevent a waste of resources by scraping only a bio cartridge used in an examination when a biochemical examination is performed. A centrifugal force-based microfluidic system(10) includes: a spindle motor(12); a frame(15) which has a plurality of cells(20) divided by barrier ribs(18), is detachably fitted in the spindle motor, and rotates; and a bio cartridge(30) which is detachably mounted on at least one of the plurality of cells. The bio cartridge has a chamber(35) for storing fluid, a channel(36) for transferring the fluid, and a valve(33) for controlling a flow of the fluid.
Abstract:
A closing valve unit is provided to close the channel of a biochip rapidly by using an electromagnetic wave, and remove an air pump or a heating plate from the substrate which is required for dissolving and transporting paraffin wax into the channel, so that the substrate is miniaturized and integrated. A closing valve unit(110A) comprises: valve chambers(120A, 125A) which contain a valve filler containing a phase transition material which is solid state at room temperature and a plurality of micro heating particles which are dispersed to the phase transition material, absorb the external electromagnetic energy and emit heat; connection pathways(122A, 127A) for connecting the valve chambers to the channel; and external energy sources(150) for irradiating the electromagnetic wave to the valve filler, wherein the micro heating particles which are irradiated by the external electromagnetic wave dissolve and expand the phase transition material, so that the valve filler enters the channel through the connection pathways and close the channel. The reaction apparatus(100A) contains a fluid channel(111), a substrate(101) having a reaction chamber on the fluid channel, and the closing valve unit(110A).
Abstract:
A valve unit is provided to control the channel opening precisely in the biochip by increasing speed of channel opening compared to the conventional valve unit with plugs consisting of wax, minimize the substrate by containing no heating tool of wax, and reduce the manufacturing costs of the valve unit and apparatus by containing smaller number of energy source than number of plugs. A valve unit(50A) comprises: a plurality of plugs(60) which contains a phase transition material which is a solid phase at room temperature and a plurality of micro heating particles which are dispersed to the phase transition material, absorb the external electromagnetic energy and emit heat, and block fluid flow formed by the channel(55); and external energy sources(70) for irradiating the electromagnetic wave to the plugs, wherein the micro heating particles emit heat and phase transition material is dissolved when the external electromagnetic wave are irradiated to the plugs. The valve unit further comprises a phase transition material chamber(65) for receiving the dissolved phase transition material and micro heating particles mixed thereto.
Abstract:
A magnetic bead packing unit by using centrifugal force, a microfluidic device comprising the same unit and a method for immunoassay by using the same microfluidic device are provided to pack the magnetic beads in the microfluidic device effectively by using centrifugal and magnetic forces, minimize the size of microfluidic device, and reduce operation power of the device. The magnetic bead packing unit by using centrifugal force comprises: a controllable rotation plate(100); a microfluidic channel(130) which is located on the rotation plate and contains an inlet(31) disposed near the rotation center, an outlet(32) disposed far away the rotation center and a channel from the inlet and outlet through which fluid flows from the inlet to outlet by the centrifugal force; a curved part(135) which is a part of the microfluidic channel and is curved; and a magnet(40) which is disposed corresponding to the curved part and influencing magnetic force to fluid flowing the channel. The microfluidic device comprises a rotation body having a sample fluid chamber(110) disposed near the rotation center and a waste chamber(150) disposed far away the rotation center, a microfluidic channel, a curved part and a magnet.
Abstract:
본 발명은 원핵 세포를 이용하여 독성물질의 유해성을 전기적으로 측정하는 방법 및 장치에 관한 것으로, 보다 구체적으로는 독성물질 존재 시 초래되는 세포 내 변화를 원핵 세포의 세포막의 전기적 신호 변화로서 측정함으로써, 독성물질의 유해성을 분석하는 방법 및 장치에 관한 것이다. 본 발명에 따르면, 독성여부 및 유해성 정도를 매우 손쉽게 빠른 시간 내에 전기적으로 측정 가능하고, 유해물질의 특정 종류와 상관없이 유해성을 측정할 수 있어 범용의 응용예를 가질 뿐만 아니라, 랩-온-어-칩(lab-on- a-chip)에 적용하여 구현하는 것 또한 용이하다.
Abstract:
본 발명은 원심분리기를 이용하여 혈액 중의 혈청을 분리하기 위한 혈청 분리용 마이크로 장치에 관한 것으로서, 마이크로 장치 내에 소정의 챔버 및 채널이 구비되어 있어, 혈액을 마이크로 장치 내에 형성되어 있는 채널에 주입시키고 원심분리를 수행하면 그 주입된 혈액 중의 혈청과 혈구가 서로 다른 챔버에 분포되어 혈액으로부터 혈청을 분리할 수 있는 혈청 분리용 마이크로 장치를 제공한다.
Abstract:
본 발명은 (a) 티올기를 갖는 분자가 포함된 시료와 은 나노입자를 혼합하여 상기 분자와 은 나노입자 복합체를 형성하는 단계; 및 (b) 상기 혼합물로부터 상기 복합체를 분리하여 제거하는 단계를 포함하는 은 나노입자 (silver nanoparticle)를 이용하여 표적 물질을 정제하는 방법에 관한 것이다. 본 발명에 따르면, 기존의 핵산 정제 방법에 비해 3 단계 작업으로 신속하게 PCR 증폭이 가능한 DNA 를 정제할 수 있으므로, 랩온어칩에 매우 유용하게 이용될 수 있다.