| 摘要 |
PROBLEM TO BE SOLVED: To effectively extract and obtain at a low cost an antioxidant and an active-oxygen eliminator by concentrating an org.-solvent extract soln. of prune fruits. SOLUTION: The antioxidant is obtd. by extracting prune fruits with a hydrophilic org. solvent, partitioning the extract between water and a fat-sol. org. solvent, and concentrating the resultant org. solvent layer or by extracting the fruits with water, extracting the extraction residue with a fat-sol. org. solvent, and concentrating the resultant extract. The eliminator is obtd. by extracting the fruits with water and removing fibers and saccharides from the extract or by extracting the fruits with a hydrophilic org. solvent and removing saccharides from the extract. Since the major part of the active antioxidant component is fat-sol., an antioxidant having a strong activity similar to DL-α- tocopherol, BHT, or BHA is obtd. by extracting the fruits with a fat-sol. solvent followed by concentration. Since the major part of the active-oxygen-eliminating component is water-sol., the eliminator is obtd. by the extraction with water or a hydrophilic org. solvent followed by the removal of fibers and saccharides from the extract.
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