FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (3): 42-46.

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Effects of High Voltage Pulsed Electric Fields on Structural Characteristics of Soybean Protein Isolates

 LI  Ying-Qiu, ZHANG  Wan-Zhong, CHEN  Zheng-Xing   

  1. 1.College of Food and Biological Engineering, Shandong Institute of Light Industry, Jinan 250353, China; 2.School of Food Science and Technology, Southern Yangtze University, Wuxi 214036, China; 3.Department of Laboratory Medicine, Jingxia Hospital of North China Petroleum Company, Renqiu 062552, China
  • Online:2007-03-15 Published:2011-12-31

Abstract: Effects of high voltage pulsed electric fields(PEF) on the structural characteristics of soybean protein isolates (SPI) were studied in this paper. The results indicated that at definite conditions, the changes of molecular weight, particle size and secondary structure of SPI are very small or almost do not occur during PEF treatment time 0~288μs. When treatment time is longer than 432μs, the molecular weight and particle size of SPI changes due to protein denaturation, and dissociation and reaggregation of subunits can form larger molecular aggregation by non-covalent interaction. But the secondary structure of SPI has little change.

Key words: high voltage pulsed electric fields, soybean protein isolates, structural characteristics