CO_2 Sorption by Microbial Cells and Sterilization by High-pressure CO_2
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概要
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The amount of CO_2 sorbed by microbial cells in a Saccharomyces cerevisiae-water system was measured by a gravimetric method with a quartz spring, and the correlation between CO_2 sorption and the sterilization effect of high-pressure CO_2 was investigated. The sterilization rate of Saccharomyces cerevisiae by high-pressure CO_2 was measured by varying the water content and CO_2 pressure, and analyzed by reaction kinetics. The sterilization rate could be described by a first-order reaction, and the dependence of the sterilization rate constant, k, on the water content and CO_2 pressure was evaluated. The amount of CO_2 sorbed by the microbial cells reached equilibrium at a constant CO_2 pressure within a few minutes and was correlated well with the value of k. In addition, the amount of unfreezable water was measured by DSC as an index of the state of water in the cell-water system, this being considered to be closely related to the amount of CO_2 sorbed by the microbial cells. The value of k increased with increasing water content; however, the increase wad only slight for a water content by which free water existed.
- 社団法人日本農芸化学会の論文
- 1997-06-23
著者
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Hata C
Department Of Applied Biological Chemistry Division Of Agriculture And Agricultural Life Sciences Th
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Hata Chiho
Department Of Applied Biological Chemistry The University Of Tokyo
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Kumagai Hitoshi
Department Of Agricultural And Biological Chemistry Nihon University
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Kumagai Hitoshi
Department Of Applied Biological Chemistry Division Of Agriculture And Agricultural Life Sciences Th
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Nakamura Kozo
Department Of Agricultural Chemistry The University Of Tokyo
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Nakamura Kozo
Department Of Applied Biological Chemistry Division Of Agriculture And Agricultural Life Sciences Th
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