Abstract: Highly dispersible inorganic compound nanoparticles modified by functional molecules include the functional molecules; a high molecular nitrogen compound having at least two amino groups selected from primary amino groups, secondary amino groups and tertiary amino groups; and inorganic compound nanoparticles bonded to at least one amino group of the at least two amino groups. The high molecular nitrogen compound is modified by the functional molecules, and the inorganic compound nanoparticles are covered with the high molecular nitrogen compound modified by the functional molecules.

Abstract: Highly dispersible inorganic compound nanoparticles modified by functional molecules include the functional molecules; a high molecular nitrogen compound having at least two amino groups selected from primary amino groups, secondary amino groups and tertiary amino groups; and inorganic compound nanoparticles bonded to at least one amino group of the at least two amino groups. The high molecular nitrogen compound is modified by the functional molecules, and the inorganic compound nanoparticles are covered with the high molecular nitrogen compound modified by the functional molecules.

Abstract: A composite body of an inorganic compound and cells includes animal cells filled with fine particles of the inorganic compound, and the fine particles of the inorganic compound adhered to an outer portion of the animal cells. A method of producing a composite body of an inorganic compound and cells is also provided, including cultivating animal cells in a culture medium containing fine particles of the inorganic compound, and separating a solid component from the cultivated product.

Abstract: The invention relates to a histostain composition for endoscope containing one or more members selected from colors derived from Monascus. The stain composition is a staining agent which sharpens the shapes of digestive tract lumen surfaces and the like with a light in the visible wavelength range, having a function of being excited by a light of specific wavelength to emit fluorescence, and being biologically safe and suitable for endoscopy.

Abstract: Highly dispersible inorganic compound nanoparticles include a high molecular nitrogen compound having at least two amino groups selected from primary amino groups, secondary amino groups and tertiary amino groups; and inorganic compound nanoparticles bonded to at least one amino group of the at least two amino groups. The inorganic compound nanoparticles are covered with the high molecular nitrogen compound.