FOOD SCIENCE ›› 2006, Vol. 27 ›› Issue (11): 294-296.

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Comparison of Two Kinds of Drying Methods for Processing Microecological Agent of Bacillus Subtilis var. Natto

 WANG  Fa-Xiang,   Wang-Qing-Yun,   Zhong-Qing-Ping, XIA  Li-Qiu   

  1. 1.College of Life Science,Hunan Normal University,Changsha 410081,China; 2.College of Life Science and Technology,Central South Forestry University,Changsha 410004,China; 3.College of Food Science,South China Agricultural University,Guangzhou 510642,China
  • Online:2006-11-15 Published:2011-11-28

Abstract:  Vacuum freeze-drying and spray-drying,the two kinds of drying methods for producing microecological agent of Bacillus subtilis var. natto,their effect on live-bacterium amount of the agent,the nattokinase vitality and the livability of Bacillus subtilis var. natto were studied. The results indicated that,for the two methods of drying,the maximal live-bacterium amount reach 1.21×109CFU/g and 0.96×109CFU/g,the best bacterium livability are 84.71% and 67.49%,and the highest nattokinase activities are 11516.58IU/g and 7203.96IU/g,respectively.

Key words:  , Bacillus subtilis var. natto; nattokinase; microecological agent; spray-dry; vacuum freeze-dry;