FOOD SCIENCE ›› 2012, Vol. 33 ›› Issue (3): 14-18.doi: 10.7506/spkx1002-6630-201203004

• Basic Research • Previous Articles     Next Articles

Gel Properties of Soybean Protein Isolate Prepared from Alcohol-Washed Soybean Flakes Subjected to Dry Heat Treatment

HUANG You-ru,CHEN Yi-yong,ZHU Dong-xing,ZHAO Yang,WANG Tan-yu   

  1. School of Biological Science and Food Engineering, Changshu Institute of Technology, Changshu 215500, China
  • Online:2012-02-15 Published:2012-02-14

Abstract: Alcohol-washed soybean flakes were treated at different temperatures and used to prepare soybean protein isolates (SPIs). The gel properties and other related properties of SPIs from alcohol-washed soybean flakes were characterized. The gel strength of SPI increased with increasing dry heat treatment temperature, while the gel elasticity exhibited a somewhat downward trend. The fluorescence and UV-visible spectra showed that the microenvironment around the chromospheres changed after dry heat treatment. Meanwhile, the surface hydrophobicity of soluble proteins and the extent of molecular aggregation obviously increased. Proper dry heat treatment could increase the solubility of SPI but gradually reduce the gel elasticity as a result of enhanced molecular aggregation.

Key words: soybean protein isolate, gel property, dry heat treatment

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