Food Science and Biotechnology

Korean Society of Food Science and Technology (한국식품과학회)
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FT-IR and X-Ray Diffraction Characterization of Melanoidins Formed from Glucose and Fructose with Amino Acid Enantiomers in the Maillard Reaction

  • Kim, Ji-Sang (Department of Food and Nutrition, Kyung Hee University) ;
  • Lee, Young-Soon (Department of Food and Nutrition, Kyung Hee University)
  • Published : 2009.04.30
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Abstract

The objective of this study was to investigate Fourier transform infrared (FT-IR) spectrometry and the X-ray diffraction (XRD) characterization of melanoidins formed from glucose and fructose with amino acid enantiomers in the Maillard reaction. Before dialysis, FT-IR spectroscopy of all the samples showed that the characteristic absorption intensities appeared as a broad and intense band of the stretching vibration of the -OH group at 3,400/cm for a high pH. The absorption bands of the melanoidins sharply decreased in intensity after dialysis as compared to those before dialysis. In particular, the absorption bands at 992 and 575/cm disappeared. The XRD confirmed that the crystal structure of the melanoidins disappeared after dialysis and a new crystal structure was formed at 9 and $28^{\circ}$ ($2{\theta}$. In particular, broad diffraction peaks were formed in the $10-21^{\circ}$ ($2{\theta}$) range for a high pH, while other sharp diffraction peaks disappeared.

Keywords

References

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