Abstract: According to the present invention, precipitation of a reactive substance-bound microparticle can be prevented in a dispersion liquid, to make a concentration of the reactive substance-bound microparticle uniform in the dispersion liquid. The present invention provides a method of preventing precipitation of a reactive substance-bound microparticle. The method includes coexisting at least one selected from the group consisting of polyanion or its salt, dextran, cyclodextrin, polyethylene glycol, and glycerol, with the microparticle in a dispersion liquid.

Abstract: A suspension storage container (10) has a flat portion across a specific region including the tail end. The flat portion has an outer peripheral wall (13) forming a flat outer peripheral surface and partition walls (14) that extend in the flat cross section of the outer peripheral wall (13) in a direction substantially orthogonal to the major axis direction of the flat cross section to partition a chamber inside the outer peripheral wall (13) into plural chambers (S1) through (S3) aligned side by side in the major axis direction. A suspension (K) is stored only in part of all the chambers (S1) through (S3), that is, the chamber (S2), and a sealing film 21 having the outline almost identical with the outline of the outer peripheral wall is laminated to the tail end surfaces of the outer peripheral wall (13) and the partition walls (14).

Abstract: A central electrode (12a) and an outer electrode (16a) are arranged in such a manner that their top end portions are inclined in the same direction with respect to the axial direction of the outer conductor (14). When the outer conductor (14) and the moveable conductor (16) are relatively shifted in the axial direction, the central electrode (12a) and the outer electrode (16a) slidingly move on each other along the inclined direction, whereby a biotissue is cut between the central electron (12a) and the outer electrode (16a).

Abstract: A fecal analyzing apparatus includes an extraction/dilution section (43) for extracting a fecal suspension from a feces sampling container (1). The fecal suspension is formed by dispersing feces in a feces-dissolving liquid in the feces sampling container (1), and mixing a diluting solution having a different concentration than the feces-dissolving liquid, with respect to a specific pigment, into the extracted fecal suspension in a predetermined amount. An optical-absorbance measurement section (61) detects the concentration of the specific pigment to be changed in response to the addition of the diluting solution, and a control device (66) determines the adequacy of the extraction amount of the fecal suspension in accordance with the detected concentration of the specific pigment. The adequacy of the extraction amount of the fecal suspension can be determined to provide an adequate assay result.

Abstract: A method for detecting or measuring homocysteine in a sample includes the steps of (a) reacting a D-amino acid present in a sample with a D-amino acid converting enzyme to convert the D-amino acid into a substance that does not serve as a substrate of D-amino acid oxidase or D-amino acid acetyltransferase; (b) reducing homocysteine in the sample with a thiol compound; (c) reacting the reduced homocysteine with a methyltransferase and a methyl donor to newly produce D-amino acid; and (d) reacting the produced D-amino acid with the D-amino acid oxidase or the D-amino acid acetyltransferase in the presence of an SH reagent to produce hydrogen peroxide, and color-developing the produced hydrogen peroxide by using an oxidative color-developing agent.