Microwave Heating Affects Composition and Oxidative Stability of Sesame (Sesamum indicum) Oil

The effects of microwave heating on antioxidative components and lipid quality of sesame seeds were studied. Amounts of antioxidative components were 576, 18, and 8 mg/kg oil for γ-, δ-, and α-tocopherols; 6,824, 5,642, and 54 mg/kg oil for sesamin, sesamolin, and sesamol, respectively. During microwave treatments, concentrations of tocopherols, sesamin and sesamolin gradually decreased, and ca. 20% of these dominant components was lost after 30 min heating. However, microwave treatments for 16 to 20 min, which would be optimal to prepare sesame oil with better quality, still retained over 85% of the antioxidative components (with few exceptions) and caused no significant chemical changes in lipids.

[1]  M. Namiki,et al.  Recent Studies on Sesame Seed and Oil , 1988 .

[2]  H. Yoshida,et al.  Effects of Microwave Energy on the Tocopherols of Soybean Seeds , 1989 .

[3]  H. Yoshida,et al.  Effects of Microwave Treatment on the Trypsin Inhibitor and Molecular Species of Triglycerides in Soybeans , 1988 .

[4]  K. Kikugawa,et al.  Participation of sesamol in stability of sesame oil , 1983 .

[5]  S. Nelson,et al.  Dielectric and Steam Heating Treatments for Quality Maintenance in Stored Pecans , 1985 .

[6]  Y. Fukuda.  Food Chemical Studies on the Antioxidants in Sesame Seed , 1990 .

[7]  H. Tsuyuki.  Utilization of High Frequency and Microwave Heating in Food Industry , 1982 .

[8]  J. I. Gray,et al.  Measurement of lipid oxidation: A review , 1978 .

[9]  H. Yoshida,et al.  Microwave Energy Effects on Quality of Some Seed Oils , 1990 .

[10]  H. Fadel,et al.  Effect of antioxidants on the volatiles of roasted sesame seeds , 1985 .

[11]  J. L. Collins,et al.  HEAT INACTIVATION OF TRYPSIN INHIBITOR IN FRESH GREEN SOYBEANS AND PHYSIOLOGICAL RESPONSES OF RATS FED THE BEANS , 1980 .

[12]  Gow-Chin Yen,et al.  Influence of seed roasting process on the changes in composition and quality of sesame (Sesame indicum) oil , 1990 .

[13]  Gow-Chin Yen,et al.  Oxidative stability of sesame oil prepared from sesame seed with different roasting temperatures , 1989 .

[14]  J. Folch,et al.  A simple method for the isolation and purification of total lipides from animal tissues. , 1957, The Journal of biological chemistry.

[15]  S. Kawakishi,et al.  Oxidative Degradation of β‐Cyclodextrin Induced by Lipid Peroxidation , 1983 .

[16]  Masayasu Nagata,et al.  Chemical Aspects of the Antioxidative Activity of Roasted Sesame Seed Oil, and the Effect of Using the Oil for Frying , 1986 .

[17]  Taro Matsumoto,et al.  Comparison of Tocopherol Contents in Crude and Refined Edible Vegetable Oils and Fats by High Performance Liquid Chromatography , 1983 .

[18]  P. Perera,et al.  Effects of Microwave Heating and Gamma Irradiation on Phytate and Phospholipid Contents of Soybean (Glycine max. L.) , 1989 .

[19]  C. Manley,et al.  SOME AROMA COMPONENTS OF ROASTED SESAME SEED (Sesamum indicum L.) , 1974 .

[20]  B. M. Watts,et al.  A distillation method for the quantitative determination of malonaldehyde in rancid foods , 1960 .