摘要:
A multilayer analysis film for assaying transaminase in a coupled reaction system by a kinetic method comprises (1) a porous layer containing a transaminase substrate, (2) a coloring indicator layer for the detection of hydrogen peroxide, and (3) a transparent support, integrally laminated in this order. Pyruvate oxidase is located in a large excess in the uppermost porous layer where a rate-determining step receives maximum exposure to oxygen in the air. By the use of the analysis film, transaminase activity can be assayed with high sensitivity.
摘要:
An analysis film for assaying transaminase activity comprises a reagent layer containing pyruvic acid oxidase, a combination of a hydrogen donor and a coupler--which is capable of forming a cationic dye--and an anionic polymer. The cationic dye formed by the reaction with a color indicator composition for detecting hydrogen peroxide is fixed with the anionic polymer, thereby mobilization and diffusion of the cationic dye being prevented so that the analysis film achieves high detection sensitivity and high accuracy.
摘要:
A quantitative analysis film comprising a reagent layer comprising a cationic dye-forming color indicator for detecting hydrogen peroxide and an anionic polymer. By the use of such a color indicator and an anionic polymer in combination, a cationic dye is formed; the formed cationic dye is then bound and fixed to the anionic polymer to provide an intensified color. A method for the colorimetric assay of hydrogen peroxide or a precursor thereof with high sensitivity and high efficiency is also disclosed.
摘要:
A thiopyrylium compound having t-butyl groups at the 2- and 6-positions of the thiopyrylium nucleus, having a main absorption near the red region, i.e., 600 to 700 nm but substantially no side absorption near 400 nm, and useful as a sensitizer for a photoconductive composition.
摘要:
A color photographic silver halide light-sensitive material which comprises a support having thereon at least two light-sensitive layers, at least one of said layers containing a compound capable of coupling with an oxidation product of a color developing agent and in which splitable hetero aromatic ring containing a triazole or diazole ring is connected to the carbon atom in the coupling position, through the nitrogen atom in the 1-position of said triazole or diazole ring.
摘要:
A dry analytical element for use in the measurement of activity of enzyme in an aqueous liquid, such as, body fluid, having one or more water-retaining layers. The enzyme has an optimum pH in a in pH range within which the dissociation of p-nitrophenol is insufficient for color formation. The layers of the element comprise a self-developing substrate having p-nitrophenol group attached to the molecular structure through an ether or ester linkage and a cationic polymer, said self-developing substrate and said cationic polymer being incorporated separately in different water-retaining carriers which are arranged to allow the layers to have liquid contact with each other.
摘要:
A multilayer analytical element for quantitative analysis of bilirubin in a liquid sample by a diazo method, which comprises a laminated structure consisting essentially of:(1) a porous reagent layer containing an acidic binder and a diazonium salt being reactive to bilirubin to produce azobilirubin;(2) an absorbent layer capable of absorbing an excessive liquid portion; and(3) a liquid-impermeable light-transmissive support.
摘要:
An integral multilayer analytical element for the measurement of alkaline phosphatase activity, which comprises a porous spreading layer containing a self-developable substrate in response to contact with alkaline phosphatase, a buffer layer containing a diffusion-resistant base and a support in a laminated form.
摘要:
A multilayer analytical element for analysis of analyte in a liquid sample comprising a liquid sample-spreading layer, a reagent layer containing a diazonium salt, and a liquid-impermeable light-transmissive support, being laminated in this order, in which said reagent layer contains a sulfonic acid group-containing polymer having at least 10 molar % of a repeating unit selected from those consisting of a sulfoalkyl group and sulfophenyl group. The analytical element can be an element comprising a porous reagent layer containing a diazonium salt and the liquid-impermeable light-transmissive support, being laminated in this order.
摘要:
A thiopyrylium compound having t-butyl groups at the 2- and 6-positions of the thiopyrylium nucleus, having a main absorption near the red region, i.e., 600 to 700 nm but substantially no side absorption near 400 nm, and useful as a sensitizer for a photoconductive composition.