| 摘要 |
PROBLEM TO BE SOLVED: To obtain an antioxidant with strong free-radical elimination action and antioxidant action by incorporating an extract of Mimosa tenuiflora into the same. SOLUTION: A part or the whole of Mimosa tenuiflora, a plant of the pulse family, including leaves, stems, flowers, roots, etc., in the raw or dried state is extracted with a solvent in an amount of 100 pts.wt. (based on 5-50 pts.wt. dried plant) for 1 hr to 1 week, The extractant is utilized in the form of a concentrate prepared by concentrating under normal or reduced pressure, in the form of a solid prepared by evaporating the solvent from the concentrate to dryness, in the form of a solid prepared by the crystallization out of the concentrate followed by filtration and drying, or in the form of a solid prepared by freeze-drying the concentrate. Preferably, the Mimosa tenuiflora extract, as an antioxidant, is compounded in an amount (dry basis) of 0.0120.0 wt.%, still preferably 0.01-10 wt.%, of an object article to be protected, At least one solvent selected from among water, monohydric lower alcohols, liquid polyhydric alcohols, lower alkyl esters, hydrocarbons, ketones, ethers, acetonitrile, etc., is used as the extraction solvent.
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