Biotechnology and Bioprocess Engineering:BBE

  • 제3권2호
  • /
  • Pages.71-77
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  • 1998
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  • 1226-8372(pISSN)
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  • 1976-3816(eISSN)
한국생물공학회 (The Korean Society for Biotechnology and Bioengineering)
권호 표지

Effective Production of N-Acetyl-$\beta$-glucosamine by Serratia marcescens Using Chitinadceous Waste

  • Kim, Kwang (Department of Chemical engineering, Dong-A University) ;
  • A. Louise Creagh (The Biotechnology Laboratory, Wesbrook Bldg., The University of British Columbia, Canada) ;
  • Charles A. Haynes (Biotechnology Laboratory, Wesbrook Bldg., The University of British Columbia, Canada)
  • 발행 : 1998.12.01
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초록

The strain of Serratia marcescens QM B1466 produces selectively large amount of chitinolytic enzymes (about 1mg/L medium). Enzymatic hydrolysis of chitin to N-acetyl-${\beta}$-D-glucosamine (NAG) was performed with a system consisting of two hydrolases (chitinase and chitobiase) produced by optimization of a microbial host consuming chitin particles. For the development of Large-scale biological process for the production of NAG from chitinaceous waste, the selection and optimization of a microbial host, particle size of crab/shrimp chitin sources and initial induction time using chitin as a sole carbon source on chitinase/chitobiase production and NAG production were examined. Crab-shell chitin(1.5%) treated by dilute acid and , ball-milled with a normal diameter less than 250m gave the highest chitinase activity over a 7 days culture. Crude chitinase/ chitobiase solution obtained in a 10 L fed-batch fermentation showed a maximum activities of 23.6 U/mL and 5.1 U/mL, respectively with a feeding time of 3 hrs, near pH 8.5 at 30$^{\circ}C$.

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