FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (2): 52-57.

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Glycosylation Modification of Rice Bran Glutelin by Dry-Heating

  

  • Received:2012-07-09 Revised:2012-12-22 Online:2013-01-25 Published:2013-01-15

Abstract: Rice bran glutelin was modified by glycosylation under dry -heating condition, and the optimal reaction conditions were: pH 7.8, 50 ℃, at 1:5 ratio of rice bran glutelin to glucose in weight, reaction time 24h, relative humidity 79,Under this condition the degree of grafting was 25.67% and index of browning was 0.795. Compared with the unmodified rice bran glutelin, the solubility of the modified rice bran glutelin had higher solubility within all the examined range of pH value. Its solubility was increased by 3.5 times at pH 5.0, but increased by 82.1% at pH 6.5. AT pH<8, emulsifying properties of the glycation products markedly was elevated, but the foaming properties of the glycation products improvement was not obvious. It was proved by FTIR that the rice bran glutelin was grafted with the glucose by the covalent bond. In addition, it was observed with SEM that the surface structure of the rice bran glutelin was different from the aggregation , which was pieces formed.

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