한국미생물·생명공학회지 (Microbiology and Biotechnology Letters)

  • 제25권1호
  • /
  • Pages.82-88
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  • 1997
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  • 1598-642X(pISSN)
  • /
  • 2234-7305(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
권호 표지

Metarrhizium anisopliae (Metschn.) Sorok이 생산하는 Biopolymer YU-122의 생산과 그 특성

  • 최용석 (연세대학교 식품생물공학과 및 생물산업소재연구센터) ;
  • 옥승호 (연세대학교 식품생물공학과 및 생물산업소재연구센터) ;
  • 유주현 (연세대학교 식품생물공학과 및 생물산업소재연구센터) ;
  • 배동훈 (단국대학교 식품공학과 및 생물산업소재연구센터)
  • 발행 : 1997.02.01
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초록

To produce biopolymer, Metarrhizium anisopliae (Metschn.) Sorok was cultured in a medium containing glucose 1.0%, sucrose 2.0% , soluble starch 1.0%, yeast extract 0.5%, polypeptone 0.05%, K$_{2}$HPO$_{4}$ 0.1% MgSO$_{4}$ $\CDOT $ 7H$_{2}$O 0.02%. The culture broth was centrifuged and the polymer was harvested by adding methanol to the culture supermatant. When three times of methanol was added, the polymer was coagulated and precipitated. Then it was further purified through successive SK-1B, SA-20P, HP-20 column chromatographies. This polymer was designated as Biopolymer YU-122.C:H ratio of this Biopolmer YU-122 was 1:2 and small amount of N is detected by CHN analyzer. Glucose and glactose are main components of this polymer. Average molecular weight of this biopolymer was 1.7%$\times $10$^{6}$ by Sepharose 4B gel permeation chromatography. Optimal condition for biopolymer production was investigated. When 5% of mannitol was used as a carbon source, and polypepton as a N source, highest productivity of biopolymer was achieved. C/N ratio as nutrient was also a major factor in polymer production and its optimal ratio was 3.

키워드

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