| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Outline of Final Research Achievements |
Aiming to develop non-toxic and safe photochromic pigments for food, toys and cosmetics, we have studied composites of plant extract pigments and nontoxic cosmetic/ food ingredients.
3-deoxy-anthocyanidins which are classified to anthocyanin pigments are isolated and purified from edible sorghum by using HPLC and were dissolved in a mixed solvent of butylene glycol and aqueous citric acid. This solution exhibited photochromic properties; it became vivid red by UV-A irradiation and discolored under light-shielding condition.
When the dye solution was absorbed into the pores of porous silica particle, the obtained powder exhibiting a photochromic behavior under high humidity conditions.
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