摘要:
PROBLEM TO BE SOLVED: To provide an electronic pipetter which is adapted to a very small fluid system used to move an object substance by an electroosmotic force. SOLUTION: The electronic pipetter is provided with a capillary comprising a channel. An electrode is attached along the length in the outside of the capillary, and it is terminated at the end part of the capillary in the shape of an electrode ring. When the end part of the capillary is arranged in a substance source, a substance is guided electrokinetically by operating a voltage on the electrode and the electrode in a target reservoir by which the channel communicates with a fluid. An object substance region in one row, a high- and-low ion concentration buffer or a spacer region can be formed inside the channel so as to be easily introduced into the very small fluid system.
摘要:
The present invention provides a device and methods of use thereof for desalting a solution. The methods, inter-alia, make use of a device comprising microchannels, which are linked to conduits, whereby induction of an electric field in the conduit results in the formation of a space charge layer within the microchannel. The space charge layer provides an energy barrier for salt ions and generates an ion depletion zone proximal to the linkage region between the microchannel and the conduit. The method thus enables the removal of salt ions from the region proximal to the conduit and their accumulation in a region distant from the conduit, within the microchannel.
摘要:
A microdevice for supporting a flowing nonpolar fluid is disclosed. The microdevice includes a substrate that is at least partially coated by one or more amphiphilic layers. Methods for using the device in biological and chemical assays are also disclosed.
摘要:
PROBLEM TO BE SOLVED: To provide a microchip and a microparticle fractional collection apparatus capable of stably fractionally collecting microparticles at a high speed without damaging the microparticles subject to collection.SOLUTION: A microchip includes: a sample liquid feed channel 11 permitting a sample liquid 2 containing microparticles to flow through; at least one pair of sheath liquid feed channels 12a and 12b configured to merge to the sample liquid feed channel 11 from both sides thereof for permitting a sheath liquid 3 to flow through surrounding the sample liquid 2; a merging channel 13 connected to the sample liquid feed channel 11 and the one pair of the sheath liquid feed channels 12a and 12b for permitting the sample liquid and the sheath liquid to merge and flow through the merging channel; and at least one pair of discharge channels 15a and 15b connected to the merging channel. The microchip further includes a vacuum suction unit 14 connected to the merging channel 13 for sucking and drawing in the microparticles subject to collection.
摘要:
PROBLEM TO BE SOLVED: To provide a sample concentrating device which can concentrate particles to be detected to a high concentration. SOLUTION: The inner wall surface of a passage 14 is negatively charged, and positive ions 30 contained in a sample solution 28 in the passage 14 are adsorbed on the inner wall surface of the passage 14. When an electric field is generated between electrodes 18, 19 for concentration, negatively charged particles 29 in the sample solution 28 in a concentration area between the electrodes 18, 19 for concentration is forced in the reverse direction of the electric field and moved (electrophoresis), and attracted to the electrode 18 for concentration to be flocculated and to be concentrated at the electrode 18 for concentration. The positive ions 30 are moved in the electric field direction by Coulomb force to generate a flow (electroosmotic flow) of the sample solution 28. Consequently, the particles 29 are continuously supplied to the concentration area by the electroosmotic flow, and the supplied particles 29 are concentrated by the electrophoresis. COPYRIGHT: (C)2010,JPO&INPIT