摘要:
The inventive liquid separator of laboratory use can overcome the problems in the conventional separatory funnels used for liquid-liquid phase separation. The inventive apparatus comprises (a) a first bottle-like vessel with a mouth, (b) a second bottle-like vessel with a mouth connected with the first vessel at the mouths with air-tightness but disconnectable therefrom, (c) a porous membrane partitioning the first and the second vessels and made, preferably, of a sintered body of a water-repellent plastic resin such as a fluorocarbon polymer, and (d) an air-passage tubing opening at the ends in the first and the second vessels. When a two-phase mixture of an aqueous liquid and an organic liquid is taken in the first vessel positioned above the second vessel, the organic liquid can pass through the porous membrane to be transferred into the second vessel but the aqueous liquid is retained in the first vessel by virtue of the water-repellency of the fluorocarbon polymer. The air-passage tubing serves as an air escape from the second vessel to the first so as not to disturb the down-flow of the liquid through the porous membrane.
摘要:
In the present invention, a cardiomyocyte cluster is disposed on a transparent substrate, and the quality of the cardiomyocytes is evaluated from the response of the cells to a forced pulsation stimulus applied to the cardiomyocytes. The cardiomyocyte cluster is disposed on the transparent substrate, and is exposed to the flow of a liquid containing an agent in a manner so that the agent acts on the cells, which configure a network. The extent of cardiac toxicity resulting from the agent is evaluated from measuring the fluctuations obtained from a comparison of adjacent cardiomyocytes of the network.
摘要:
A cell sorting device using an inexpensive chip capable of being exchanged for each sample. The chip includes: a first flow path allowing buffer fluid containing cells to flow down; second and third flow paths which put the first flow path therebetween and allow buffer fluid not containing cells to flow down; a fourth flow path which allows the buffer fluid as a single flow path formed by joining the buffer fluids in the other three flow paths; a cell detecting region for detecting cells flowing with the buffer fluid down the fourth flow path; and a cell sorting region for sorting the cells according to a type of the cells detected. The first to fourth flow paths are cascaded, are supplied with the buffer fluid from reservoirs with the same fluid level, and have substantially the same width or cross-section area.
摘要:
This invention relates to a method and apparatus for processing cell cultures. The apparatus comprises a micro-chamber comprising no more than one absorption layer and at least one gel layer, in this order, laminated on a transparent base plate having no conspicuous absorbency in visible and infrared regions, and at least one light source, the absorption layer having absorbency in visible and infrared regions, and the gel-like material being a substance which has a gel dissolution temperature of 100 degree C. or less, solates when heated and is in a gel state at room temperature and has absorbency for a specific wave length of visible and infrared regions, and the light source having a monochromatic light in the specific wave length, wherein the light source is disposed such that it irradiates on the absorption layer and/or the gel layer, with the exception that when no absorption layer is provided, at least two layers each composed of a gel-like material are laminated on the transparent base plate.
摘要:
A composition for promoting bacterial proliferation and selectively proliferating Lactobacillus casei subsp. casei is disclosed, which includes a dextran. A variety of biological activities originating from L. casei subsp. casei can be sustained in a living body by selectively growing-proliferating and colonizing L. casei subsp. casei in the intestine of a human being, animal, or the like or by selectively growing-proliferating L. casei subsp. casei in the intestine, without supplying L. casei subsp. casei at all times.
摘要:
An inexpensive cell analysis and separation apparatus using a flow channel formed on one surface of a substrate and a chip replaceable for each sample, and a method for culturing the separated cells without contamination, are provided. A flow channel for allowing a cell-containing buffer solution to flow is provided. Cells are detected in the middle of the flow channel, and separated to a plurality of downstream flow channels based on whether each cell fulfills a predetermined condition. A culturing tank for collecting the condition-fulfilling cells is covered with a semipermeable membrane at a top surface so as to prevent contamination during cell separation. When the cell separation is finished, the flow channel communicated with the culturing tank accommodating the condition-fulfilling cells is closed, and the culturing tank is cut off from the apparatus and put into a culturing device containing a predetermined medium to culture the cells.
摘要:
A method of inspecting a DNA chip and an apparatus therefor that allow a picture to be reconstructed in the following steps: A plurality of irradiation spots are formed on a DNA probe array mounted on a stage. Then, the stage is displaced in X, Y directions so as to execute a scanning, thereby irradiating substantially all the entire surface of the DNA probe array. Next, a plurality of emitted fluorescent lights, which are generated from the plurality of irradiation spot portions on the DNA probe array, are converged and are then detected simultaneously by multi detectors. Finally, a data processing apparatus processes the detected signals, thereby reconstructing the picture.
摘要:
The present invention provides a cell sorting device using an inexpensive chip capable of being exchanged for each sample for cell sorting. The cell sorting device uses flow paths formed on the substrate and has the following structure. The chip includes: a first flow path allowing a buffer fluid containing cells to flow down; second and third flow paths which put the first flow path therebetween and allow a buffer fluid not containing cells to flow down from both sides of the first flow path; a fourth flow path which allows the buffer fluid as a single flow path formed by the join of the buffer fluid in the first flow path and the buffer fluid in the second and third flow paths; a cell detecting region for detecting cells flowing with a buffer fluid down the fourth flow path; a cell sorting region for sorting the cells according to a type of the cells detected. The first flow path, the second and the third flow paths, the fourth flow path, the cell detecting region and the cell sorting region provided in a cascade. Two flow paths are provided to allow the cells sorted to flow downstream of the cell sorting region. The buffer fluid flowing in the first to the fourth flow paths is supplied from reservoirs having the same fluid level. The first flow path and the fourth flow path are structured to have substantially the same width or cross-section area.
摘要:
There is provided a processing apparatus and a processing method for micro-chamber for cell culture having a desired culturing space. The micro-chamber processing apparatus for cell culture of the present invention comprises a micro-chamber comprising no more than one absorption layer and at least one gel layer, in this order, laminated on a transparent base plate having no conspicuous absorbency in visible and infrared regions, and at least one light source, said absorption layer having absorbency in visible and infrared regions, and said gel-like material being a substance which has a gel dissolution temperature of 100 degree C. or less, solates when heated and is in a gel state at room temperature and has absorbency for a specific wave length of visible and infrared regions, and said light source having a monochromatic light in said specific wave length, wherein said light source is disposed such that it irradiates on said absorption layer and/or said gel layer, with the exception that when no absorption layer is provided, at least two layers each composed of a gel-like material are laminated on said transparent base plate.
摘要:
A DNA microarray system whereby measurement can be performed at a low running cost, a low price and yet a high accuracy. A nucleic acid probe (3) is immobilized on the surface of a gate insulator of an electric field effect transistor and then hybridized with a target gene on the surface of the gate insulator. A change in the surface electric charge density thus arising is detected by using the electric effect.