摘要:
The present invention relates to an electron transfer mediator comprising the osmium complex or a salt thereof, a reagent composition for an electrochemical biosensor, and an electrochemical biosensor, where the osmium compound or its salt has a stable oxidation-reduction form for a long time, a capacity to react with oxidoreductase being capable of performing the redox reaction of the target analytes, and no effect of oxygen partial pressure.
摘要:
The present invention relates to an electron transfer mediator comprising the osmium complex or a salt thereof, a reagent composition for an electrochemical biosensor, and an electrochemical biosensor, where the osmium compound or its salt has a stable oxidation-reduction form for a long time, a capacity to react with oxidoreductase being capable of performing the redox reaction of the target analytes, and no effect of oxygen partial pressure.
摘要:
The present invention is directed to a device that comprises a biomolecular processor and one or more nanotubes. Each biomolecular processor comprises a bioreactor chamber defined by a solid substrate, a plurality of spaced support structures within said bioreactor chamber and attached to the solid substrate, and one or more capture molecules immobilized to some or all of said plurality of spaced support structures, said one or more capture molecules suitable to bind to a portion of a target nucleic acid molecule in a sample. The device also comprises one or more nanotubes defined by the solid substrate and fluidically coupled to the bioreactor chamber.
摘要:
Provided are an amadoriase that is less likely to be influenced by oxygen concentration and a method and a reagent kit for measurement of HbAlc using such amadoriase. Provided are an amadoriase that is obtained via substitution of one or more amino acid residues at a position or positions corresponding to the position(s) selected from the group consisting of positions 280, 267, 269, 54, and 241 of the amadoriase derived from the genus Coniochaeta, a method for measurement of HbA1c, a reagent kit for measurement, and a sensor using such amadoriase. The modified amadoriase according to the invention has a lowered oxidase activity and an enhanced dehydrogenase activity, and this enables the use of an electron mediator, and this reduces the influence of oxygen concentration. Thus, HbAlc can be measured with high sensitivity.
摘要:
The invention relates to a system for measuring sulphite in food samples using a biosensor, a method for determining sulphite in food samples using said biosensor, and the use of said biosensor for measuring the sulphite values in food samples. The system uses an amperometric biosensor comprising a bi-enzymatic system, a working electrode, a counter electrode and a reference electrode. The bi-enzymatic system is composed of the human sulphite oxidase and peroxidase enzymes, and the immobilisation of the enzymes in the working electrode is carried out via simple physical retention. The mixture of the enzymes is mixed with a chemical mediator. The method comprises the following phases: applying a sample to the amperometric biosensor; changing the electrical current upon coming into contact with the analyte to be detected; and amperometrically measuring said electrical current in solutions with continuous agitation, using a constant potential.
摘要:
Provided are an amadoriase that is less likely to be influenced by oxygen concentration and a method and a reagent kit for measurement of HbAlc using such amadoriase. Provided are an amadoriase that is obtained via substitution of one or more amino acid residues at a position or positions corresponding to the position(s) selected from the group consisting of positions 280, 267, 269, 54, and 241 of the amadoriase derived from the genus Coniochaeta, a method for measurement of HbA1c, a reagent kit for measurement, and a sensor using such amadoriase. The modified amadoriase according to the invention has a lowered oxidase activity and an enhanced dehydrogenase activity, and this enables the use of an electron mediator, and this reduces the influence of oxygen concentration. Thus, HbAlc can be measured with high sensitivity.
摘要:
One embodiment of the present invention relates to a nucleic acid extraction device, which can realize automation, ultra-miniaturization and super-high speed in the nucleic acid extraction reaction, have no limitation to the biological specimens, such as sputum, blood, cells, urine, saliva, tissues, etc., minimize the used amount of the sample solution, and also maintain and/or improve the nucleic acid extraction efficiency with reliability.