title: Comparison of culture methods on exopolysaccharide production in the submerged culture of Cordyceps militaris and process optimization.
abstract: OBJECTIVE
  To improve exopolysaccharides (EPS) production of Cordyceps militaris (C. militaris), effects of different culture method on mycelial biomass and EPS production in the submerged culture of C. militaris were investigated.
  
  
  RESULTS
  A new two-stage fermentation process for EPS production of C. militaris was designed in this work. Central composite design (CCD) was utilized to optimize the two-stage fermentation process. The results showed that the two-stage fermentation process for EPS production was superior to other culture method (conventional static culture and shake culture). CCD revealed that the optimum values of the test variables for EPS production were shaken for 140 h followed by 130-h static culture. The maximum EPS production reached 3·2 g l(-1) under optimized two-stage culture and was about 2·3-fold and 1·6-fold in comparison with those of original static culture and shake culture.
  
  
  CONCLUSIONS
  It was indicated that a new two-stage culture method obtained in this work possessed a high potential for the industrial production for EPS of C. militaris.
  
  
  CONCLUSIONS
  The fundamental information obtained in this work is complementary to those of previous investigations on the submerged culture of C. militaris for the production of bioactive metabolites.
authors.affiliation: College of Bioscience and Bioengineering, Hebei University of Science and Technology, Shijiazhang, China. cjd007cn@163.com
authors.forename: J D
authors.initials: JD
authors.lastname: Cui
authors.forename: B Z
authors.initials: BZ
authors.lastname: Zhang
mesh_terms: D018533:Biomass; D032661:Cordyceps / Q000378:metabolism*; D005285:Fermentation; D025282:Mycelium / Q000378:metabolism; D011134:Polysaccharides / Q000096:biosynthesis*
chemical_list: D011134:Polysaccharides