JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

Volume 29 Issue 3
May 2014
Article Contents
ZHAO Xue-wei, JIA Tao, ZHANG Xue-lin, et al. FT-IR spectroscopic characterization of soybean protein isolates after thermo-mechanical treatments[J]. Journal of Light Industry, 2014, 29(3): 12-16. doi: 10.3969/j.issn.2095-476X.2014.03.003
Citation: ZHAO Xue-wei, JIA Tao, ZHANG Xue-lin, et al. FT-IR spectroscopic characterization of soybean protein isolates after thermo-mechanical treatments[J]. Journal of Light Industry, 2014, 29(3): 12-16. doi: 10.3969/j.issn.2095-476X.2014.03.003 shu

FT-IR spectroscopic characterization of soybean protein isolates after thermo-mechanical treatments

  • Received Date: 2014-03-19
    Available Online: 2014-05-15
  • Soybean protein isolate(SPI) with a moisture content of 60% was thermo-mechanically treated torque rheometer at 30℃ and 90℃ for 2 min,15 min and 30 min respectively,and characterized by Fourier transform infrared (FT-IR) spectroscopy.The results showed that after thermo-mechanical treatments,the symmetrical and asymmetrical stretching of C-H bonds in -CH2 resides became weak and even disappeared the stretching vibration and asymmetrical stretching of C-H bonds drifted to higher position.The α-helix and β-turn decreased accompanying with β-sheet and random coil increased.For that lower moisture content SPI system,the mechanical effect during thermo-mechanical processing may be the major contributor to the transformation of secondary protein structure.
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