Abstract

Disclosed is a urea concentration measurement method for measuring the concentration of urea in a dialysis waste fluid sample.  The method is characterized by comprising the steps of: supplying a dialysis waste fluid sample containing a chlorine ion and urea to a reaction zone; applying electric current to a space which is formed between a working electrode (7) and a counter electrode (8) and is filled with the dialysis waste fluid sample, wherein the thickness (t) of the sample solution that contacts with the working electrode (7) in the reaction zone is set to 20 mm or less; and measuring a chemiluminescence generated upon the reaction between an oxidizing agent produced electrolytically on the working electrode (7) with urea, thereby determining the concentration of urea.  The urea concentration measurement method does not need to feed any reagent from the outside, is maintenance-free, and can measure the concentration of urea in a dialysis waste fluid sample with high accuracy.

IPC Classes  ?

• G01N 21/78 - Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
• G01N 27/416 - Systems
• G01N 33/62 - Chemical analysis of biological material, e.g. blood, urineTesting involving biospecific ligand binding methodsImmunological testing involving urea

Abstract

A method of measuring chemiluminescence occurring in a cylinder (2), characterized by driving a piston (3) in the cylinder (2) to thereby suck either a sample solution or a reactant solution into the cylinder (2) and subsequently suck the other solution so that a turbulent flow is generated in the cylinder (2) by a jet flow brought about by the other solution to thereby attain homogeneous mixing of the sample solution with the reactant solution and by measuring any chemiluminescence generated by the homogeneous mixing. Accordingly, by piston driving, a turbulent flow can be generated in the cylinder by a jet flow brought about by the other solution to thereby homogenize the sample solution and the reactant solution within a short period of time. Thus, there can be provided a method of measuring chemiluminescence that would ensure high luminescence efficiency and high reproducibility.

IPC Classes  ?

• G01N 21/76 - ChemiluminescenceBioluminescence
• G01N 1/00 - SamplingPreparing specimens for investigation
• G01N 1/36 - Embedding or analogous mounting of samples
• G01N 33/62 - Chemical analysis of biological material, e.g. blood, urineTesting involving biospecific ligand binding methodsImmunological testing involving urea

Abstract

Disclosed is a melt-moldable biodegradable resin material which is sufficiently satisfactory in thermal characteristics and mechanical characteristics after molding (as a molded article). Specifically disclosed is a cellulose derivative characterized by having an average polymerization degree of not less than 500. This cellulose derivative is preferably a cellulose silyl ether. Also specifically disclosed is a cellulose derivative-polylactic acid graft copolymer, wherein the main chain is composed of a cellulose derivative having an average polymerization degree of not less than 500 and a graft chain is composed of a polylactic acid. In this graft copolymer, the cellulose derivative of the main chain is preferably composed of a cellulose silyl ether. Further specifically disclosed is a polylactic acid resin composition obtained by blending 1-50 parts by weight of the graft copolymer in 100 parts by weight of a polylactic acid.

IPC Classes  ?

• C08G 63/08 - Lactones or lactides
• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• C08L 1/00 - Compositions of cellulose, modified cellulose, or cellulose derivatives
• C08L 101/16 - Compositions of unspecified macromolecular compounds the macromolecular compounds being biodegradable

Abstract

A method of measuring urea concentration whereby the urea concentration of a sample solution is measured, characterized by comprising measuring chemical luminescence caused by the reaction between a hypohalous acid ion, which has been generated in the system by electrolysis, and urea and thus determining the urea concentration. By providing this method of measuring urea concentration, the hypohalous acid ion can be generated in the system by the electrolysis. Thus, it becomes unnecessary to directly handle the irritative hypohalous acid salt, which brings about a merit in cost.

IPC Classes  ?

• G01N 21/76 - ChemiluminescenceBioluminescence
• A61M 1/14 - Dialysis systemsArtificial kidneysBlood oxygenators

Abstract

Serum amyloid P component, oxidized LDL and β2-glycoprotein I can together form a complex. The presence of a disease such as hyperlipemia and arteriosclerosis can be determined by detecting the complex by using either one of an anti-serum amyloid P component antibody and an anti-β2-glycoprotein I antibody.

IPC Classes  ?

• G01N 33/53 - ImmunoassayBiospecific binding assayMaterials therefor
• G01N 33/543 - ImmunoassayBiospecific binding assayMaterials therefor with an insoluble carrier for immobilising immunochemicals