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KMID : 0380619950270010129
Korean Journal of Food Science and Technology
1995 Volume.27 No. 1 p.129 ~ p.133
Effect of Growth Rate and Cultivation Temperature on the Yeast RNA Accumulation and Autolysis Efficiency
ÀÌÇüÀç/Lee, Hyung Jae
±Ç¿À¼º/³²Èñ¼·/±è¼º·æ/Kwon, Oh Sung/Nam, Hee Sop/Kim, Sung Yong
Abstract
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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