摘要:
Provided is a novel polysaccharide derivative having a main structure of the following formula (1) in which a polysaccharide or its derivative has been chemically bonded to the inner and outer surfaces of the pores of a porous carrier at the reducing terminal of the polysaccharide or polysaccharide derivative.
Also provided are a method of producing the novel polysaccharide derivative in which a silane agent is chemically bonded to a porous carrier and thereafter a polysaccharide having a degree of polymerization from 11 to 500 or its derivative is further chemically bonded to surface treated carrier at the reducing terminal of the polysaccharide or its derivative, and a method of producing the novel polysaccharide derivative in which a polysaccharide having a degree of polymerization from 11 to 500 or its derivative is chemically bonded to a silane agent at the reducing terminal of the polysaccharide or its derivative and thereafter the polysaccharide derivative is further chemically bonded to a porous carrier. Further provided is a separating agent for chromatography containing the novel polysaccharide derivative. The novel polysaccharide derivative has excellent solvent resistance and is useful as a separating agent for chiral resolution of chiral compounds by chromatography. The methods of the present invention efficiently give the novel polysaccharide derivative.
摘要:
Disclosed are a novel fructosylamine deglycase characterized by the specificity to amadori compounds of catalyzing oxidation of the compounds to produce an α-ketoaldehyde, an amine derivative and hydrogen peroxide; a method of producing the novel enzyme by cultivating microorganisms belonging to the genus Candida and having an ability of producing the novel enzyme; and a method of quantitative determination of amadori compounds by applying the novel enzyme to a sample containing amadori compounds to measure the amount of the hydrogen peroxide to be formed by the oxidation reaction or measure the amount of the oxygen to be consumed by the reaction to thereby obtain the amount of the amadori compounds from the measured value. The invention provides a novel enzyme characterized by the high specificity to the reaction with amadori compounds, especially that having therein a saccharide moiety as bonded to the ε-amino group, and also provides a method of producing the enzyme and a method of quantitative determination of amadori compounds with the enzyme. Using the enzyme, quantitative determination of amadori compounds, which is difficult by conventional enzymatic methods, is possible with ease. In particular, in measurement of the amount of a saccharified protein in a sample from a living body, which is an important index substance in diagnosis of diabetes, the enzymatic method of the invention of measuring fructosamine in the sample is hardly influenced by other interfering substances or impurities in the sample, the influence by them having been inevitable in conventional chemical methods. Accurate determination of the amount is possible by the method, and the method is free from the inconvenience of staining the kits and instruments used. For measuring glycohemoglobin, the method displays another characteristic feature that its operation is more simple and needs less labor and time than conventional methods.
摘要:
An enzyme sensor comprising an enzyme-modified electrode and a counter electrode, wherein the enzyme-modified electrode comprises, on an electrode substrate, a homogenous composition comprising an electron-transfer mediator and an enzyme and/or an enzyme-containing substance. The enzyme sensor is useful in analysis, such as the analysis of compounds in foods or components in the living body, the diagnosis of diseases and the control of reaction processes. The preparation of the enzyme-modified electrode is also described.
摘要:
The present invention relates to a novel clinical examination method which comprises analyzing the alteration in the amount of a specific component in oligosaccharides of immunogloblin G. Human diseases such as liver diseases, malignant hypertension, immunogloblin A nephropathy, pediatric disorders, etc., are examined in terms of the alteration in bisecting N-acetylglucosamine-containing oligosaccharides in immunogloblin G from collected humor. The present invention provides highly accurate information in a manner applicable to practical operation for examination of liver diseases, allergic diseases, malignant hypertension, immunogloblin A nephropathy, pediatric disorders, as well as aging-dependent variations and the therapeutic effect of interferon.
摘要:
The electrophoretic electrode has two capillaries (2, 3) possessing different diameters and which are coaxially telescopically disposed to form a gap (14) having a predetermined width dimension between them, electrophoresis being caused in the gap 14. The electrode has an intermediate fractured portion, which is covered by a cover material, i.e., polyacrylamide gel containing an electrolytic buffer solution to form an electrically connected portion 8. The electrode may be used for electrophoresis to separate a large quantity of electrophoretically purified substance continuously and quickly.
摘要:
The total amount of sulfurous acid in a sample is measured by treating the sample with acid and/or alkali to convert any sulfurous acid-containing compound therein to free sulfurous acid and then measuring the total amount of free sulfurous acid in the sample by an oxidation reaction of free sulfurous acid to sulfuric acid using a bacterium belonging to Thiobacillus thiooxidans or Thiobacillus ferrooxidans.