Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Calorimeter
Patent
1986-12-09
1991-12-31
Maples, John S.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Calorimeter
422 57, 422 58, 435 4, 435 21, 436170, C12Q 100, G01N 2177, G01N 3122, 435, 435, 422, 422, 422, 422, 422, 422, 422, 436
Patent
active
050770110
ABSTRACT:
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.
REFERENCES:
patent: 4069017 (1978-01-01), Wu et al.
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patent: 4274832 (1981-06-01), Wu et al.
patent: 4557901 (1985-12-01), Koyama et al.
patent: 4576793 (1986-03-01), Koyama et al.
patent: 4671937 (1987-06-01), Katsuyama et al.
Amano Yoshikazo
Katsuyama Harumi
Fuji Photo Film Co. , Ltd.
Maples John S.
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