摘要:
An object of the present invention is to provide a method for analyzing a target nucleic acid fragment which can be simply and swiftly carried out by using a small apparatus, a kit for analyzing a target nucleic acid fragment using the method for analysis, and a dry analytical element for quantifying pyrophosphoric acid. The present invention provides a method for analyzing pyrophosphoric acid generated upon polymerase elongation reaction based on certain nucleotide sequence of a target nucleic acid, a kit for analysis for carrying out the above mentioned method for analysis, and a dry analytical element for quantifying pyrophosphoric acid.
摘要:
A method of producing a porous membrane, the method comprising: casting a polymer solution, in which a polymer is dissolved in a mixture of a good solvent, a poor solvent and a non-solvent, over a support, so as to form a casted polymer solution; drying the casted polymer solution, so as to form a cast film; and subjecting the cast film to a phase separation, wherein the porous membrane is produced under a condition where a temperature of a casted surface is lower than a temperature of the polymer solution, and each of a temperature change of the polymer solution and a temperature change of the casted surface is kept within ±3.0° C.
摘要:
The present invention is a method for isolating and purifying a nucleic acid, where generation of foams is able to be suppressed whereby the isolation and purification of a nucleic acid are easily and efficiently carried out, the method for isolating and purifying a nucleic acid comprising the step of: (1) contacting a sample solution containing nucleic acid to a solid phase to adsorb the nucleic acid onto the solid phase; (2) contacting a washing solution to the solid phase to wash the solid phase in such a state that the nucleic acid is adsorbed; and (3) contacting an elution solution to the solid phase to desorb the nucleic acid, wherein the sample solution containing nucleic acid contains an antifoaming agent.
摘要:
An object of the present invention is to provide a method for separation and purification of nucleic acid, which has excellent separating properties, high washing efficiency, and easy processability, which uses mass-producible solid phases with substantially uniform separating capacities, and wherein procedures can be automated, and a unit for separation and purification of nucleic acid suitable for implementing this method. The object of the present invention was attained by a method for separation and purification of nucleic acid comprising the steps of adsorbing nucleic acid onto a solid phase and desorbing the nucleic acid from the solid phase, wherein the solid phase comprises a base material in which a graft polymer chain having a hydrophilic group is bonded onto the surface; and a unit for separation and purification of nucleic acid which comprises, in a container having at least two openings, a solid phase of a base material in which a graft polymer chain having a hydrophilic group is bonded onto its surface.
摘要:
An integral multilayer analytical element in which a first fibrous porous layer, a nonfibrous porous layer, and a second fibrous porous layer superposed in this order on a water-impermeable light-transmissive support the first fibrous porous-layer having a larger pore size than the nonfibrous porous layer. The above three porous layers are integrally laminated to each other substantially closely by an adhesive discontinuously disposed so as to form microspaces continuing through from one layer to the next so as not to interfere with the approximately uniform permeation of liquid. A reagent composition which produces an optically detectable change in the presence of an analyte is incorporated in at least one of said three porous layers. When a nonporous reagent layer is incorporated on the support in the above analytical element, the reagent composition is incorporated in the nonporous reagent layer. By using the analytical element of the invention, the analytical values of various analytes of blood samples can be obtained independently of hematocrit values from whole blood samples and blood plasma samples in the range of the hematocrit values of 0% to 55%.
摘要:
The present invention provides an apparatus for separating and purifying nucleic acids, which comprises: a cylindrical syringe having a leading end part in which a first opening part is formed, a base end part in which a second opening part is formed and an accommodation part between said first opening part and second opening part, the accommodation part being able to hold liquid therein; and a solid phase-holding member connected to said leading end part, a flow hole being formed at the leading end side of the solid phase-holding member; wherein a solid phase comprised of an organic polymer having a hydroxyl group on the surface thereof is accommodated in said solid phase-holding member, the solid phase being able to adsorb and desorb nucleic acids in a sample solution; and wherein a pressure sensor capable of detecting the pressure in the accommodation part is connected.
摘要:
A method of automatically isolating and purifying nucleic acid from a nucleic acid-containing specimen is provided, the method comprising: injecting a liquid into a cartridge for isolation and purification of a nucleic acid including at least two openings from one opening of the at least two openings, in which the cartridge includes a container having the at least two openings and containing a nucleic acid-adsorbent solid phase; passing the liquid through the nucleic acid-adsorbent solid phase by a pressure difference generated by a pressure generation means for generating a pressure difference between the inside and outside of the container; and discharging the liquid from the other opening of the container to the outside of the container by a pressure difference generated by the pressure generation means, wherein a pressure generated in the inside of the container by the pressure generation means is measured, a pressure change velocity and a pressure change acceleration are calculated on the basis of the value of the measured pressure, and the timing of completion of discharge of the liquid from the container is determined by use of a temporal change pattern of at least one of the measured pressure, the pressure change velocity and the pressure change acceleration.
摘要:
An object of the present invention is to provide a method for separating and purifying a nucleic acid by adsorbing the nucleic acid in a test sample to a surface of a solid phase and desorbing the nucleic acid by washing and the like. The present invention provides a method for separating and purifying RNA from a nucleic acid mixture, comprising a step of: adsorbing and desorbing a nucleic acid in the nucleic acid mixture containing RNA and DNA to and from a solid phase of an organic macromolecule.
摘要:
A micro-array for analysis of DNA is prepared by the steps of spotting onto a solid carrier in its predetermined area in which plural reactive groups are fixed an aqueous solution which contains a thickening agent and probe molecules (e.g., DNA fragments) having a group reactive with the reactive group of the solid carrier to produce covalent bonding; spotting onto the solid carrier in a different area having the same reactive groups an aqueous solution (same or different); incubating the aqueous solution-spotted solid carrier to produce the covalent bondings; and washing the solid carrier with an aqueous medium to remove the thickening agent from the solid carrier. An electrostatic bonding can be utilized in place of the covalent bonding.
摘要:
A method of quantitatively analyzing an analyte contained in a whole blood sample, wherein a dry multi-layered analysis element is used. The method provides particular merits when the used multi-layered analysis element has no light-shielding layer which is interposed, in the conventional analysis element, between a coloring reagent layer and a blood cell separating layer, so that red coloring matters of blood cells are detected from the support side during the step of measuring the optical density of the reflected light. After the optical density due to coloring matters of blood cells trapped by the blood cell separating layer has reached a constant level or background density, the changing rate in optical density is measured and then the measured changing rate is converted to the corresponding content or activity of the analyte through a colorimetric operation, or the total change in optical density is measured and then the substantially constant background density is subtracted therefrom to know the change in optical density caused by a coloring dye or like material formed in the coloring reagent layer in the presence of the analyte, followed by a similar conversion operation performed on the basis of the principle of colorimetry, to determine the content or activity of the analyte.