Effects of sterol structure, temperature, and lipid medium on phytosterol oxidation

被引：93

作者：

Soupas, L ^{[1
]}

Juntunen, L ^{[1
]}

Lampi, AM ^{[1
]}

Piironen, V ^{[1
]}

机构：

[1] Univ Helsinki, Dept Appl Chem & Microbiol, FIN-00014 Helsinki, Finland

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2004年 / 52卷 / 21期

关键词：

phytosterol oxides; phytostanol oxides; gas chromatography-mass spectrometry; thermooxidation; lipid medium;

D O I：

10.1021/jf049168k

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Factors contributing to the oxidative stability of phytosterols were studied. Unsaturated stigmasterol and saturated sitostanol were used as model compounds and were heated at different temperatures in different lipid matrices for various periods of time. Accumulations of the major secondary oxidation products were used as a marker of the stability of heated compounds, and the products were analyzed by gas chromatography-mass spectrometry. The results showed that both temperature and heating time, as well as sterol structure and lipid matrix composition, affected phytosterol oxidation. In particular, the interactions between different lipid matrices and temperatures had drastic effects on the total contents of the phytosterol oxides formed and also on the reaction pathways of oxidation, During heating at high temperatures for prolonged periods, >20% of stigmasterol was oxidized. At moderate temperatures the oxidation of stigmasterol was rather slow. Sitostanol oxide contents were low under all heating conditions studied.

引用

页码：6485 / 6491

页数：7

共 34 条

[1] Comparative effects of phytosterol oxides and cholesterol oxides in cultured macrophage-derived cell lines [J].

Adcox, C ;

Boyd, L ;

Oehrl, L ;

Allen, J ;

Fenner, G .

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2001, 49 (04) :2090-2095

[2] Presence of phytosterol oxides in crude vegetable oils and their fate during refining [J].

Bortolomeazzi, R ;

Cordaro, F ;

Pizzale, L ;

Conte, LS .

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2003, 51 (08) :2394-2401

[3] Kinetic model of the cholesterol oxidation during heating [J].

Chien, JT ;

Wang, HC ;

Chen, BH .

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1998, 46 (07) :2572-2577

[4] Studies on phytosterol oxides .2. Content in some vegetable oils and in french fries prepared in these oils [J].

Dutta, PC .

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, 1997, 74 (06) :659-666

[5]

FRANEL EN, 1998, LIPID OXIDATION

[6] IN SEARCH OF BETTER METHODS TO EVALUATE NATURAL ANTIOXIDANTS AND OXIDATIVE STABILITY IN FOOD LIPIDS [J].

FRANKEL, EN .

TRENDS IN FOOD SCIENCE & TECHNOLOGY, 1993, 4 (07) :220-225

[7]

Gardner H. W., 1987, AUTOXIDATION UNSATUR, P51

[8] Oxyphytosterols are present in plasma of healthy human subjects [J].

Grandgirard, A ;

Martine, L ;

Demaison, L ;

Cordelet, C ;

Joffre, C ;

Berdeaux, O ;

Semon, E .

BRITISH JOURNAL OF NUTRITION, 2004, 91 (01) :101-106

[9]

Grandgirard A, 2002, CHOLESTEROL AND PHYTOSTEROL OXIDATION PRODUCTION: ANALYSIS, OCCURRENCE, AND BIOLOGICAL EFFECTS, P375

[10]

Holman R.T., 1954, Prog. Chem. Fats Other Lipids, V2, P51, DOI [10.1016/0079-6832(54)90004-X, DOI 10.1016/0079-6832(54)90004-X]

← 1 2 3 4 →