FOOD SCIENCE ›› 2011, Vol. 32 ›› Issue (24): 73-77.doi: 10.7506/spkx1002-6630-201124016

• Processing Technology • Previous Articles     Next Articles

Phosphorylation Modification of Polysaccharides from Entermorpha

SUN Xue1,PAN Dao-dong1,2,*,ZENG Xiao-qun1,CAO Jin-xuan1   

  1. (1. College of Life Science and Biotechnology, Ningbo University, Ningbo 315211, China; 2. Branch of National Dairy Processing Technology Developing Center, Nanjing Normal University, Nanjing 210097, China)
  • Online:2011-12-25 Published:2011-12-29

Abstract: This study was undertaken to optimize the phosphorylation of Enteromorph polysaccharides prepared by hot water extraction, deproteinization, decolorization, and sequential chromatographic purification on DEA-Sepharose Fast Flow and Sephadex G-100 columns. Phosphate group content in phosphorylated products was investigated with respect to reaction conditions including temperature, reaction time, pH and phosphorylation agent dosage (sodium tripolyphosphate-sodium trimetaphosphate at a mass ratio of 6:1) by one-factor-at-a-time experiments and subsequent response surface analysis. The optimal phosphorylation conditions were pH 9.0, temperature 80 ℃ and phosphorylation agent dosage 0.10 g/mL for a reaction duration of 5 h. Under these conditions, the phosphate group content in phosphorylated products was 14.40%.

Key words: polysaccharides from Entermorpha, phosphorylation, response surface methodology (RSM)

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