Journal
FOOD CHEMISTRY
Volume 290, Issue -, Pages 16-23Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.03.126
Keywords
Soy protein isolate; Thermal denaturation; Binding constant; Binding sites; Headspace-solid-phase micro extraction-gas; chromatography-mass spectrometry (HS-SPME-GC-MS)
Funding
- Natural Science Foundation of China [31471583]
- National First-class discipline program of Food Science and Technology [JUFSTR20180201]
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The interactions between flavors (hexyl acetate [HxAc], heptyl acetate [HpAc], linalyl formate [LiFo], linalyl acetate [LiAc], geraniol, linalool, limonene and myrcene) and soy protein isolate (SPI) were investigated, the influence of flavors structure and preheated SPI (PSPI) were determined by using headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME/GC-MS) technology. For HxAc and HpAc, the binding of SPI and the flavors decreased in the order nature > 80 degrees C > 90 degrees C > 100 degrees C PSPI, for LiFo, LiAc, geraniol, and linalool, nature < 80 degrees C < 90 degrees C < 100 degrees C PSPI. For limonene and myrcene, an increase in headspace concentration or salting out effect was noticed. The NSPI (nature SPI) and PSPI of 80 degrees C showed two class binding sites for HxAc and HpAc. These results serve as a foundation for further investigation into the effect of preheating of SPI on its ability to bind to flavor-inducing compounds.
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