Abstract: There is provided a composition for separating blood serum or blood plasma that can inhibit bubbling during sterilization, and can inhibit the occurrence of phase separation during storage. The composition for separating blood serum or blood plasma according to the present invention comprises a (meth)acrylic acid ester-based polymer, a silica fine powder, and a silicone oil, wherein the (meth)acrylic acid ester-based polymer has fluidity at room temperature, and has a weight average molecular weight of 15000 or more and 100000 or less.

Abstract: A specimen collection container is provided, the specimen collection container being capable of suppressing a change in a mixing ratio of a specimen collected to a liquid contained even when a long period of time has elapsed after manufacturing. A specimen collection container according to the present invention is a specimen collection container into which a specimen is collected, the specimen collection container including: a container main body having an opening; a plug attached to the opening; a barrier film disposed on an outer surface of the container main body; and a liquid contained in the container main body, the barrier film having a water vapor transmission rate at 40° C. and 90% RH of 0.8 g/(m2·day) or less.

Abstract: Provided is a blood collection container with which a specimen with a high leukocyte recovery rate and a small amount of contaminating erythrocytes can be obtained. A blood collection container according to the present invention is a blood collection container by which a predetermined amount of blood is collected, the blood collection container including: a blood collection container main body; and a hemocyte separation material contained in the blood collection container main body, the hemocyte separation material having a specific gravity at 25° C. of 1.075 or more and 1.

Abstract: There is provided a blood collection container capable of suppressing the contamination of white blood cells into blood plasma. A blood collection container according to the present invention is a blood collection container into which a predetermined amount of blood is collected. The blood collection container includes a blood collection container main body, and a blood plasma separation material, an osmotic pressure regulator, and an anticoagulant contained in the blood collection container main body. The specific gravity of the blood plasma separation material at 25° C. is 1.030 or more and 1.120 or less. When the osmotic pressure regulator and the anticoagulant contained in the blood collection container main body are dissolved in an amount of physiological saline solution equivalent to a predetermined amount of blood collected in the blood collection container to obtain an osmotic pressure measurement solution, the specific gravity of the blood plasma separation material at 25° C.

Abstract: Provided is a composition for mononuclear cell-containing plasma separation capable of suppressing a flow of the composition for mononuclear cell-containing plasma separation during storage, capable of satisfactorily forming a partition during centrifugation, and capable of yielding mononuclear cell-containing plasma with little admixture of blood cell components other than mononuclear cells. The composition for mononuclear cell-containing plasma separation according to the present invention contains an organic component having fluidity at 25° C. and two or more kinds of inorganic fine powders, and has a specific gravity of 1.060 or more and 1.080 or less at 25° C.

Abstract: Provided is a clot adhesion preventing agent capable of suppressing adhesion of clot to the inner wall surface of a blood collection container. The clot adhesion preventing agent according to the present invention includes a polyether compound or a silicone oil, and an amino acid.

Abstract: There is provided a composition for separating blood serum or blood plasma that can inhibit bubbling during sterilization, and can inhibit the occurrence of phase separation during storage. The composition for separating blood serum or blood plasma according to the present invention comprises a (meth)acrylic acid ester-based polymer, a silica fine powder, and a silicone oil, wherein the (meth)acrylic acid ester-based polymer has fluidity at room temperature, and has a weight average molecular weight of 15000 or more and 100000 or less.

Abstract: There is provided a serum- or plasma-separating composition capable of maintaining stable blood separation performance over a prolonged period even if subjected to a sterilization step during production or to prolonged storage. The serum- or plasma-separating composition comprises a resin composition having fluidity at normal temperature, a silica fine powder, and an amide-based compound represented by the following formula (1): wherein R3 is an alkyl group having 1 to 4 carbon atoms; and R1 and R2 are independently a hydrogen atom or a linear or branched alkyl group having 1 to 8 carbon atoms.

Abstract: There is provided a serum- or plasma-separating composition capable of maintaining stable blood separation performance over a prolonged period even if subjected to a sterilization step during production or to prolonged storage. The serum- or plasma-separating composition comprises a resin composition having fluidity at normal temperature, a silica fine powder, and an amide-based compound represented by the following formula (1): wherein R3 is an alkyl group having 1 to 4 carbon atoms; and R1 and R2 are independently a hydrogen atom or a linear or branched alkyl group having 1 to 8 carbon atoms.