• 한국해양바이오학회지
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• 제2권2호
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• pp.120-122
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• 2007

A $Q_{10}$-producing photosynthetic bacterium was isolated from the silt at Nakdong river. The isolate had 1.55 mg of $Q_{10}$ per gram of dry cell. By the 16s-rDNA sequence analysis, the isolate was found to be Rhodobacter sphaeroids with 100% similarity (Genbank Accession No.=AM696701).

• 한국해양바이오학회지
• /
• 제2권3호
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• pp.198-200
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• 2007

Cultivation of a $Q_{10}$-producing photosynthetic bacterium, Rhodobacter sphaeroids, was carried out in a 1-L flask to characterize its cellular growth reaction. The result of experiment showed that dissolve oxygen in the broth was depleted within 7 h. ORP decreased with decrease of DO, and recovered somewhat with increase of pH. The growth of R. spahaeroids reached at late-log phase in 140 h of reaction. The final pH and dry-cell weight were 7.62 and 2.2 mg/mL, respectively. The $Q_{10}$ content in the final broth was 2.35 mg/g dry cell weight, which was higher than that obtained in tube culture.