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논문 기본 정보

자료유형
학술저널
저자정보
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한국식품영양과학회 Journal of Food Science and Nutrition Journal of Food Science and Nutrition Vol.7 No.1
발행연도
2002.3
수록면
28 - 32 (5page)

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A Micrococcus sp. producing catalase was isolated from soil,, a commercial-scale cultivation, purification of catalase were conducted. The maximum catalase activity was about 103 BU/mL obtained after 46 hr of cultivation in a 30 L fermenter containing 2% glucose, 2% peptone, 4% yeast extract,, 0.5% NaCl. Soybean sauce, CSL (corn steep liquor),, yeast extract were also studied as media substitutes in the media 30 L fermenter. The optimum medium components for the production catalase were found to be 2% glucose, 4% soybean sauce,, 16% CSL. In a 18 kL fermenter, the stationary phase in the cell growth, maximum catalase activity (112 BU/mL) were reached after 46 hr of cultivation, which was the same result as in the 30 L fermenter. The catalase activity was purified with over 17 folds in four steps with a 33.6% yield. From 104,250 mg of protein after cell lysis, 1,966 mg of the purified enzyme with a specific activity of 192.7 kBU/mg was obtained. The residual activity with the addition of 10% NaCl exhibited more than 100%. The use of just NaCl produced a higher residual activity than combination of bencol (benzyldimethyl ammoniumcholride), PG (propyleneglycol).

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Abstract

INTRODUCTION

MATERIALS AND METHODS

RESULTS AND DISCUSSION

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