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KMID : 0380619950270010129
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Korean Journal of Food Science and Technology
1995 Volume.27 No. 1 p.129 ~ p.133
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Effect of Growth Rate and Cultivation Temperature on the Yeast RNA Accumulation and Autolysis Efficiency
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이형재/Lee, Hyung Jae
권오성/남희섭/김성룡/Kwon, Oh Sung/Nam, Hee Sop/Kim, Sung Yong
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Abstract
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Continuous fermentations were performed in order to investigate the effect of culture condition on the yeast RNA accumulation and autolysis efficiency. The content of intracellular RNA increased with increasing dilution rate, showing its maximum value of 14.8% at D=0.35 h^(-1). Also, both RNA productivity and specific RNA productivity tended to increase with the increase of dilution rate. The maximum biomass was obtained at 30C in the fixed dilution rate of 0.2 h^(-1), whereas the maximum RNA content appeared at the lowest temperature experimented. Growth rate affected significantly on the yeast autolysis efficiency such that the extraction ratio(TN/TN) increased with increasing growth rate, whereas the hydrolysis ratio(AN/TN) was reversed. On the other hand, its efficiency was little affected by cultivation temperature.
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