Kabushiki Kaisha Toshiba

Morinaga Co. Ltd.

Tsutomu Honjoh

Ikuo Uematsu

Tomohiro Takase

Ichiro Tono

Kayoko Oomiya

Shingo Kasai

Yuriko Oyama

Isao Nawata

Hideo Eto

Masami Hirata

Isao Kishimoto

Kenichi Uchiyama

Masatoshi Sakai

Rieko Tsuruma

Kaori Itoh

Eriko Watanabe

Masanori Sugitani

Yumiko Watanabe

Shiroo Muraoka

Kaori Ito

An optical-waveguide sensor chip includes an optical waveguide having a first substance immobilized on the surface thereof, the first substance being specifically reactive with an analyte substance, and fine particles dispersed on the optical waveguide and having a second substance immobilized on the surface thereof, the second substance being specifically reactive with the analyte substance.

Optical-waveguide sensor chip, method of manufacturing the same, method of measuring substance, substance-measuring kit and optical-waveguide sensor

Provided is a technique of extracting a component in a food from the food by using a reducing agent that is inexpensive and has a mild reducing action. A component in a food is extracted by mixing the food with an extractant containing a sulfite. In addition, the resultant food extract is brought into contact with a specific antibody that specifically recognizes a substance included in a specified ingredient of interest for inspection, to thereby inspect the presence or absence and/or the amount of a specified ingredient in a food by utilizing an immunological measurement method. Further provided is a food inspection kit for inspection of the presence or absence and/or the amount of a specified ingredient in a food, including: (1) an extractant and a sulfite to be added to the extractant, or an extractant including a sulfite added; and (2) an antibody that specifically recognizes a substance included in a specified ingredient of interest for inspection.

Method of extracting food component, food inspection method and food inspection kit

The method for measuring the concentration of the measuring object uses a sensor chip comprising an optical waveguide layer and an antibody immobilized layer formed on the surface of the optical waveguide layer, which comprises immobilizing the measuring object and an enzyme-labeled antibody labeled with a labeling enzyme on the antibody immobilized layer of the sensor chip having an immobilized antibody, producing a color-developing and precipitating enzyme reaction product by allowing to react a coloring reagent with the labeling enzyme on the antibody immobilized layer to precipitate the enzyme reaction product on the antibody immobilized layer, allowing to totally reflect a light impinged on the sensor chip from the outside at an interface between the optical waveguide layer and the antibody immobilized layer, and observing to a physical value of the totally reflected light.

Concentration measuring method, concentration measuring kit, and sensor chip for use in the method

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Yokohama, Japan

Tsutomu Honjoh