Abstract: Provided is a nucleic acid purification method capable of efficiently purifying a nucleic acid. The nucleic acid purification method including the steps of: mixing a nucleic acid with an antifoaming agent and a coprecipitation agent; and purifying the nucleic acid, in which the antifoaming agent is at least one of a nonionic surfactant and a silicone antifoaming agent.

Abstract: Provided is an inspection chip with simplified channel switching structure, which is generally complicated.

Abstract: Provided is a method for purifying a nucleic acid capable of easily purifying a nucleic acid and efficiently recovering the nucleic acid. The method for purifying a nucleic acid including a step of bringing a sample containing a nucleic acid into contact with an extraction solution containing a metal cation to prepare an extraction solution containing the nucleic acid, a step of bringing the extraction solution containing the nucleic acid into contact with an anionic adsorbent 4 to cause the nucleic acid to adsorb to the anionic adsorbent 4, a step of bringing a wash solution having a pH of 5.0 or less into contact with the anionic adsorbent 4 to wash the anionic adsorbent 4 to which the nucleic acid is adsorbed, and a step of bringing a recovery solution having a pH of 6.0 or more into contact with the anionic adsorbent 4 to isolate the nucleic acid from the anionic adsorbent 4.

Abstract: Provided is a micro-fluid chip that enables reducing contamination between branch channels, has a relatively simple channel structure and facilitates miniaturization. A micro-fluid chip (1) having a channel structure (3) through which a fluid is delivered, wherein the channel structure (3) includes: a main channel (4) having an inflow port (5) and an outflow port (6); a plurality of branch channels (11) to (13) connected to the main channel (4), each branch channel having an inflow end on a side connected to the main channel (4) and an outflow end that is an end portion on an opposite side to the inflow end; and a sub-branch channel (14) connected to the main channel (4) between at least one pair of adjacent branch channels (11) and (12) among the plurality of branch channels (11) to (13), the sub-branch channel (14) having an inflow end on a side connected to the main channel (4).

Abstract: Provided is a micro fluid device capable of reliably performing measurement of a fluid into a branched flow path and dispensing of a predetermined amount of a fluid into a plurality of the branched flow paths.

Abstract: Provided is a micro-fluid chip that enables reducing contamination between branch channels, has a relatively simple channel structure and facilitates miniaturization. A micro-fluid chip 1 having a channel structure 3 through which a fluid is delivered, wherein the channel structure 3 includes: a main channel 4 having an inflow port 5 and an outflow port 6; a plurality of branch channels 11 to 13 connected to the main channel 4, each branch channel having an inflow end on a side connected to the main channel 4 and an outflow end that is an end portion on an opposite side to the inflow end; and a sub-branch channel 14 connected to the main channel 4 between at least one pair of adjacent branch channels 11 and 12 among the plurality of branch channels 11 to 13, the sub-branch channel 14 having an inflow end on a side connected to the main channel 4.

Abstract: The present invention provides a microchip that allows to highly accurately control a transported amount of a fluid. The microchip 1 includes: a container 3 encapsulating a liquid reagent X (fluid) filled in the container 3; and a substrate 2 including an accommodation section 4 in which the container 3 is placed. The accommodation section 4 includes a top surface and a bottom surface 2b. The accommodation section 4 is opened to the top surface of the substrate 2. At least a part of the inflow passage 5 that is connected to the accommodation section 4 and into which a medium for transporting the liquid reagent X flows is provided on the substrate 2. At least a part of the outflow passage 6 that is connected to the accommodation section 4 and through which the liquid reagent X flows out is provided on the substrate 2. The microchip 1 further includes a sheet member 7 that is provided on the top surface of the substrate 2 so as to close the opening of the accommodation section 4.