Wako Pure Chemical Industries, Inc.

Tadashi Hamanaka

Yoshitsugu Sakata

Kenzi Iwata

Toshiro Hanada

Kazuhiko Yamanishi

Yutaka Miki

Yoshinobu Miyashita

Hiroyuki Kodera

Yoshibonu Miyashita

Misato Nakaue

Stability of a sensitivity test disk obtained by impregnating a disk carrier with an aqueous solution of antibacterial agent and drying is improved by incorporating a water-soluble polymer material having film-forming properties in the disk carrier.

Stabilized sensitivity test disk

A substrate in a sample can be determined quantitatively by measuring colorimetrically superoxide ion generated by treating the sample with a specific oxidase corresponding to the substrate to be determined, said oxidase treatment and measuring of the generated superoxide ion being conducted by using a reagent composition comprising (a) an oxidase, (b) peroxidase, (c) a phenol and/or an amine, (d) a thiol compound, (e) a color producing reagent to be reduced, and if necessary (f) a chelating agent.

Process for quantitative determination of substrate treated with oxidase

A composition comprising a 9-fluorenone-2-diazonium salt, an acid or acidic salt which is solid at normal temperatures, and if necessary an anionic surface active agent can produce a vivid red color instantly by reacting with urobilinogen without interfered with bilirubin.

Composition, method and test strip for examining urobilinogen

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Kobe, Japan

Tadashi Hamanaka