Abstract: Provided is an orally administrable vaccine against a coronavirus infectious disease. A transformed Bifidobacterium designed to display a part or a whole of a constituent protein of a coronavirus on a surface of the Bifidobacterium enables the provision of the orally administrable vaccine against a coronavirus infectious disease. The transformed Bifidobacterium designed to display a part or a whole of a constituent protein of a coronavirus on a surface of the Bifidobacterium can induce humoral immunity and cellular immunity through oral administration to suppress an increase in severity of pneumonia or the like even after viral infection.

Abstract: A cyclodextrin derivative is an X-hydroxynaphthalene-Y-amidated cyclodextrin formed by subjecting a starting cyclodextrin to an addition reaction with A-hydroxyl-B-carboxyl naphthalane and used for measuring the contamination degree of water.

Abstract: Disclosed is a clathrate compound comprising an organic peroxide as a guest compound and at least one of natural and derived cyclodextrins as a host compound.

Abstract: A temperature detecting unit extended, through a cable, from an inside wall of the microwave oven has a probe formed at end portion thereof for inserting the probe into an object such as food items to be heated for detecting the temperature of the object during the heating, so as to produce a signal indicative of the temperature of the object. The cable of the temperature detecting unit is formed by comparatively thin wires having sufficient flexibility and durability so as to facilitate the manipulation of the unit during inserting thereof into the object.

Abstract: A microwave oven includes radiation detecting means for detecting radiations from at least two detection points within a heating oven of the microwave oven. A signal of the radiation detecting means derived from that point of said at least two detection points which is at relatively high temperature is used to control a high frequency wave generator which feeds a high frequency wave into the heating cavity. The radiation detecting means includes a radiation detector and a chopper which chops radiations directed to the radiation detector from said at least two detecting points.