| Project/Area Number |
16360388
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Reaction engineering/Process system
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| Research Institution | Tohoku University |
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Principal Investigator |
YONEMOTO Toshikuni Tohoku University, Graduate School of Engineering, Professor (40125688)
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| Co-Investigator(Kenkyū-buntansha) |
KITAKAWA Naomi Tohoku University, Graduate School of Engineering, Associate Professor (00261503)
KUBO Masaki Tohoku University, Graduate School of Engineering, Assistant Professor (50323069)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥15,100,000 (Direct Cost: ¥15,100,000)
Fiscal Year 2006: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2005: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥8,500,000 (Direct Cost: ¥8,500,000)
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| Keywords | bioactive material / prevention of oxidation / antioxidant / β-carotene / vitaminE / vitaminC / catechin / kinetic model / 油水二相系 / β-カロチン |
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| Research Abstract |
In this research, a high-speed regeneration cycle of antioxidants was designed by combining an amphiphilic catechin with a lipophilic vitamin E and a hydrophilic vitamin C for the purpose of long-term prevention of f3-carotene oxidation in the food system. In the presence of vitamin E and C, the following things were clarified: 1) the carotene oxidation was prevented as long as vitamin E existed in the system, 2) vitamin C was related to two contrastive reactions consuming and regenerating vitamin E, 3) the prevention period of carotene oxidation significantly increased under specific conditions. Conventionally the regeneration reaction of vitamin E by vitamin C was considered to contribute the increase of the prevention period. However, oxygen in the system was clarified to be almost consumed by the oxidation of vitamin C itself and consequently the carotene oxidation was prevented. The novel kinetic model considering the reaction mechanisms of carotene, vitamin E and C well described the contrastive effects progressing or preventing the carotene oxidation according to the amounts of vitamin C and oxygen in the system. On the other hand, the following things were clarified in the presence of catechin: 1) catechin was related to two contrastive reactions consuming carotene and preventing the carotene oxidation and 2) the structure of catechin was controlled which reaction preferentially occurred.
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