2000 Fiscal Year Final Research Report Summary
Degradation mechanism of lipids by the photo-oxidation and the development of application on anti-oxidation technology of lipids
| Project/Area Number |
10650762
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
反応・分離工学
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| Research Institution | MIYAZAKI UNIVERSITY |
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Principal Investigator |
KAWANO Yoshinobu Miyazaki Univ., Fac.Eng., Prof., 工学部, 教授 (10040974)
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| Co-Investigator(Kenkyū-buntansha) |
SHIOMORI Koichiro Miyazaki Univ., Fac.Eng., Res.Assoc., 工学部, 助手 (80235506)
HATATE Yasuo Kagoshima Univ., Fac.Eng., Prof., 工学部, 教授 (00038051)
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| Project Period (FY) |
1998 – 2000
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| Keywords | Squalene / Peroxide / UV irradiation / Decomposition products / Polymer / Bubble column reactor / Chemiluminescence detector |
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| Research Abstract |
The oxidation reaction of squalene was investigated using a bubble column reactor under the various conditions either with or without UV irradiation. Oxidation products and decomposition products during the oxidation were also qualitatively and quantitatively analyzed. For the oxidation, two stages which are an induction period with a slow increase in hydroperoxide and an accelerated period with rapid increase are observed. The oxidation rate in the induction period increases with photo intensity, however, the rate in the accelerated period is unaffected by the UV irradiation. The formation rate equation of peroxide is derived from the chain reaction model of lipid radical and the experimental results are analyzed using the rate equation. The formation rate of the peroxide is independent on the peroxide concentration and expressed as a function of photo intensity in the induction period, and is expressed by the first order for the peroxide concentration in the accelerated period. The peroxide produced was analyzed by a HPLC system equipped with chemiluminescence and UV/VIS detectors. Six kinds of peroxide are detected as oxidation porducts from squalene. As the oxidation proceeds, the peroxide products are changed to ketones, aldehydes, fatty acids and their polymers.
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