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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국미생물생명공학회 한국미생물·생명공학회지 한국미생물·생명공학회지 제36권 제3호
발행연도
2008.1
수록면
215 - 220 (6page)

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초록· 키워드

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Rahnella aquatilis AY2000 has an unique characteristic which produces an anti-yeast substance (AYS). The AYS of the strain AY2000 was always secreted on agar plate, however, its activity in liquid culture was labile upon storage of the medium. In this paper, cultural conditions of the strain AY2000 for the AYS production were investigated in liquid culture, and minimal inhibitory concentration (MIC) against Saccharomyces cerevisiae was determined for the AYS activity. MIC of the AYS cultured in PYG broth at 25oC for 24 hr was 23.5 μg/mL, however, that in MYCS (pH 5.5) broth at the same condition was 15.5 μg/mL. The activity of the AYS had increased rather in MYCS broth excluded NH4-citrate than in the same broth contained NH4-citrate, and MIC of the AYS produced in MYCS broth without NH4-citrate was 15.5 μg/mL. When the strain AY2000 was maintained in MYCS broth without NH4-citrate but added 100 μM FeCl3, the activity of the AYS had increased and its MIC was 7.8 μg/mL. MIC of the AYS was 7.8 μg/mL after the strain AY2000 was cultured in MYCS broth containing 100 μM FeCl3 without NH4-citrate, however, its MIC was 31.3 μg/mL after 48-60 hr culture in the same broth.

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