Abstract: A method of preparing a purified purple corn coloring agent comprising passing a purple corn color extract solution through an adsorption resin, washing with water, and releasing the purple corn color from the resin with the use of an aqueous solution containing alcohol of 25 to 45 v/vt %.

Abstract: The invention provides a method for efficiently improving emulsifying ability of gum arabic, in other words, a method for producing gum arabic with excellent emulsifying ability. Further, the present invention provides a method by which a gum arabic modified so as to have a high emulsifying ability can be obtained without involving the problem of forming syrupy masses or sticking to the vessel or the trouble of excessive dehydration or charring. The above-described methods can be carried out by heating gum arabic (unmodified) under dry conditions. Preferably, the method is carried out by heating gum arabic in such a manner that the loss-on-drying is not more than 3%.

Abstract: Purple corn color which has a high safety and no odor in odor components since impurities (odor components, precursor thereof, a mycotoxin fumonisintc) seemingly contained in the purple corn material have been eliminated therefrom; and color preparations containing the same. This purple corn color can be obtained by a preparation method comprising passing a purple corn color extract solution through an adsorption resin, washing with water, and releasing the purple corn color from the resin with the use of an aqueous solution containing alcohol of 25 to 45 v/vt %.

Abstract: High-resolution powder diffraction is performed using high-energy synchrotron radiation as an x-ray source in such a way that a detector mounted on a measuring instrument such as a diffractometer is moved by smaller distances than the distance between adjacent x-ray detection units (pixels) in order to measure data for interpolation between pixels and the obtained interpolating data are put together to thereby improve the spatial resolution in measurement that has been limited by the detection unit in the detector.

Abstract: The invention provides a cochineal color, a colorant product containing the cochineal color and the method of its production, wherein the cochineal color is free of allergenic proteins and contaminants derived from the raw material Coccus cacti L. insect and can be added with safety to products taken by mouth, such as foods, pharmaceutical products, etc. The invention relates to a cochineal color substantially free of proteins of molecular weight not less than 6000. The invention also relates to a process for producing a cochineal color which comprises subjecting a cochineal extract solution to proteolysis and then to at least one treatment selected from the group consisting of adsorption treatment, ion exchange treatment, acid treatment, extraction treatment and membrane treatment.

Abstract: High-resolution powder diffraction is performed using high-energy synchrotron radiation as an x-ray source in such a way that a detector mounted on a measuring instrument such as a diffractometer is moved by smaller distances than the distance between adjacent x-ray detection units (pixels) in order to measure data for interpolation between pixels and the obtained interpolating data are put together to thereby improve the spatial resolution in measurement that has been limited by the detection unit in the detector.

Abstract: The invention provides a cochineal color, a colorant product containing the cochineal color and the method of its production, wherein the cochineal color is free of allergenic proteins and contaminants derived from the raw material Coccus cacti L. insect and can be added with safety to products taken by mouth, such as foods, pharmaceutical products, etc. The invention relates to a cochineal color substantially free of proteins of molecular weight not less than 6000. The invention also relates to a process for producing a cochineal color which comprises subjecting a cochineal extract solution to proteolysis and then to at least one treatment selected from the group consisting of adsorption treatment, ion exchange treatment, acid treatment, extraction treatment and membrane treatment.

Abstract: The invention provides a cochineal color, a colorant product containing the cochineal color and the method of its production, wherein the cochineal color is free of allergenic proteins and contaminants derived from the raw material Coccus cacti L. insect and can be added with safety to products taken by mouth, such as foods, pharmaceutical products, etc. The invention relates to a cochineal color substantially free of proteins of molecular weight not less than 6000. The invention also relates to a process for producing a cochineal color which comprises subjecting a cochineal extract solution to proteolysis and then to at least one treatment selected from the group consisting of adsorption treatment, ton exchange treatment, acid treatment, extraction treatment and membrane treatment.