FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (3): 364-368.

Previous Articles     Next Articles

Physico-chemical Property Study of Exopolysaccharide Produced by Bifidobacterium 22-5

CHEN  Qian, LI  Wei-Xin, CHENG  Jing, SHI  Ai-Min, TANG  Ying-Long, LI  Ping-Lan   

  1. College of Food Science and Nutrition Engineering, China Agricultural University, Beijing 100083, China
  • Online:2008-03-15 Published:2011-08-24

Abstract: The purity and some physicochemical properties of EPS (exopolysaccharide) by Bifidobacterium astroides 22-5 are studied. The result showed that the EPS is an onefold polysaccharide without dissociative nucleic acid and protein ,whose molecular mass 1.1×105 D, acidity , pH 6.5, soluble in water, but indissoluble in organic solvent.solubility. The viscosity of EPS is negatively correlated with temperature. Besides, it is stable when the pH of environment varies in the range from 4 to 10 and the ironic intensity is changed

Key words: Bifidobacterium, exopolysaccharide, purity, physico-chemical property