FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (7): 222-225.

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Study on Preparation of Water Lettuce Dietary Fiber by Combination of Enzymolysis and Alkaline Hydrolysis

 HU  Xiao-Jun, HE  Yu-Xue, ZENG  Yu-Dai   

  1. School of Chemical Science and Technology, Zhanjiang Normal University, Zhanjiang 524048, China
  • Online:2007-07-15 Published:2011-10-24

Abstract: The preparation technology of water lettuce dietary fibe was studied by combination of enzymolysis and alkaline hydrolysis. Meanwhile, the characteristics of water lettuce dietary fiber were analysed. The results showed that the best preparation conditions are α-amylase concentration of 0.6%, NaOH concentration of 3% at 60 ℃ for 90 min extraction. Under these conditions extraction rate was up to 76%, but chemical extraction rate was only 65%. Combination of enzymolysis and alkaline hydrolysis was superior to chemical extraction on water-holding and expansibility.

Key words: water lettuce, dietary fiber, preparation technology