摘要:
Provided is a quantitative cell dispensing apparatus using liquid droplet manipulation, for quantitatively dispensing cells from hydrophilic suspension containing a plurality of cells. The quantitative cell dispensing apparatus includes hydrophilic suspension, a liquid droplet manipulation unit, a dispensing unit, a sensing unit, and a control unit. The hydrophilic suspension includes a plurality of cells and electrolyte, and the liquid droplet manipulation unit. The liquid droplet manipulation unit includes an inlet and a liquid droplet outlet portion. The dispensing unit discharges a liquid droplet received from the liquid droplet outlet portion to a target portion. The sensing unit optically senses liquid droplets distributed on a panel of the liquid droplet manipulation unit. The control unit analyses the number of cells contained in each liquid droplet using a single sensed by the sensing unit, and controls the liquid droplet manipulation unit to transfer a liquid droplet containing a predetermined number of cells to the liquid droplet outlet portion.
摘要:
A device and method for printing biomolecules on a substrate uses an electric charge concentration effect. The device overcomes limitations of the material and surface characteristics of a substrate, enables accurate dropping of a biomolecular droplet onto a target surface of the substrate, prevents electric discharge, and thus allows the manufacturing of a high density biochip by depositing numerous biomolecular droplets, which are small in size and volume, onto a substrate. The device includes: a needle-shaped electric field forming electrode; a substrate which is grounded and disposed below the electric field forming electrode, the substrate including a target surface; and an open circuit type voltage applying unit which supplies first electric charges to the electric field forming electrode to drop the biomolecular droplet onto the target surface of the substrate.
摘要:
A method for controlling the hydrophilic droplet using the electrowetting principle is disclosed. More specifically, the present invention provides a method for increasing the change of the contact angle in the interface that is formed between the hydrophilic droplet and the nonpolar fluid by adding a constant concentration of two-element electrolyte or three-element electrolyte to the hydrophilic droplet; and an apparatus for controlling the droplet having the change of the contact angle and velocity scope increased by the method.
摘要:
A device for printing a droplet onto a substrate includes: a droplet generating member which is needle-shaped and comprises a receiving portion disposed vertically to receive a solution, and a discharge hole connected to the receiving portion and formed on a bottom of the receiving portion so that the solution can be discharged from the receiving portion; a substrate disposed below the droplet generating member, the substrate includes a target portion to which the droplet discharged from the discharge hole of the droplet generating member is dropped and attached; a voltage applier applying a voltage to the droplet so that the droplet can be dropped onto the target portion of the substrate; a volume measuring unit measuring the volume of the droplet; and a droplet control unit maintaining the volume of the droplet at a predetermined level based on the measured volume of the droplet.
摘要:
Provided is a quantitative cell dispensing apparatus using liquid droplet manipulation, for quantitatively dispensing cells from hydrophilic suspension containing a plurality of cells. The quantitative cell dispensing apparatus includes hydrophilic suspension, a liquid droplet manipulation unit, a dispensing unit, a sensing unit, and a control unit. The hydrophilic suspension includes a plurality of cells and electrolyte, and the liquid droplet manipulation unit. The liquid droplet manipulation unit includes an inlet and a liquid droplet outlet portion. The dispensing unit discharges a liquid droplet received from the liquid droplet outlet portion to a target portion. The sensing unit optically senses liquid droplets distributed on a panel of the liquid droplet manipulation unit. The control unit analyses the number of cells contained in each liquid droplet using a single sensed by the sensing unit, and controls the liquid droplet manipulation unit to transfer a liquid droplet containing a predetermined number of cells to the liquid droplet outlet portion.
摘要:
Provided is a device for printing a biomolecule solution onto a substrate using an electrohydrodynamic (EHD) effect. The device can deposit drops of the biomolecule solution with small size and volume and print more of the biomolecule solution onto a substrate, thereby enabling the manufacture of a high density biochip. The device includes a first electric field forming electrode that is shaped like a needle, is made of a conductive material, is disposed vertically, and includes an accommodating area in which the biomolecule solution is accommodated and an outlet formed on a bottom end of the accommodating area through which the biomolecule solution is discharged; a substrate disposed below the first electric field forming electrode, and including a target surface onto which the biomolecule solution discharged from the outlet of the first electric field forming electrode is deposited; a second electric field forming electrode made of a conductive material and disposed below the first electric field forming electrode; and a voltage applying device which is electrically connected to the first and second electric field forming electrodes to apply a voltage between the first and second electric field forming electrodes so that an electric field is generated around the biomolecule solution suspended in the outlet, wherein, due to the interaction between the electric field and a difference between dielectric constants of the biomolecule solution having a free surface and the surrounding atmosphere, the electric force acts inward on the biomolecule solution, thereby causing a predetermined amount of the biomolecule solution to drop onto the target surface of the substrate.
摘要:
A dual clutch transmission with multiple gears operatively coupled thereto, comprises: first and second input shafts coaxially arranged to each other; a first clutch operatively coupled with the first input shaft to drive the transmission with a gear selected from a first set of non-consecutively numbered gears; a second clutch coaxially arranged with the first clutch and operatively coupled with the second input shaft to drive the transmission with a gear selected from a second set of non-consecutively numbered gears; first and second clutch actuating devices, each including an actuator and a pivot member, each pivot member operatively coupled between the actuator and a clutch applicator of cylindrical shape to move its clutch applicator for clutch operation; and a plurality of first and second clutch levers received in a clutch retaining housing in a circularly and alternately arranged pattern. The first and second clutch levers are configured to move the first and second clutches, respectively. The cylindrically shaped clutch applicator of the first clutch actuating device is disposed coaxially with the cylindrically shaped clutch applicator of the second clutch actuating device, and the first clutch levers and the second clutch levers can operate independently to each other upon movement of the first clutch applicator or the second clutch applicator to perform a selective clutch operation between the first and second clutches.
摘要:
The present invention provides a method of purifying RNA, including contacting a solid support with an acidic solution having a RNA-containing sample and a kosmotropic salt having a concentration of less than 1M, thereby binding the RNA to the solid support. According to the present invention, RNA is purified efficiently due to high RNA yield and low contamination by DNA. The present invention is particularly effective in purifying RNAs of 200 nucleotides or less.
摘要:
Provided is an agitation device used to agitate a solution in a hybridization chamber, the agitation device including: the hybridization chamber; first and second air channels connected to ends of the hybridization chamber; a first valve disposed in the first air channel; a second valve disposed in the second air channel; an integrated air channel connecting the first and second air channels; and a pump disposed in the integrated air channel. The agitation device is suitable for effective diffusion of a sample when performing hybridization using a DNA chip. Therefore, a probe can be effectively hybridized with a target material.
摘要:
Provided are a primer set for amplifying a target sequence specific to Bordetella pertussis, Chlamydophila pneumoniae, Haemophilus influenzae, Klebsiella pneumoniae, Legionella pneumophila, Moraxella catarrhalis, Mycoplasma pneumoniae, Pseudomonas aeruginosa, Stapylococcus aureus, and Streptococcus pneumoniae, the primer set including at least one oligonucleotide of 10 to 100 nucleotides in length, selected from the group consisting of oligonucleotides each of which comprises a fragment of at least 10 contiguous nucleotides present in a sequence as set forth in SEQ ID NO: 1 and at least one oligonucleotides of 10 to 100 nucleotides in length, selected from the group consisting of oligonucleotides each of which comprises a fragment of at least 10 contiguous nucleotides present in a sequence as set forth in SEQ ID NO: 2; and probes specific to a specific species of the 10 bacterial species.