Oxygen Uptake Rate of Immobilized Growing Candida lipolytica
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概要
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The oxygen uptake rate of gel-entrapped growing microorganisms was studied, in particular the effects of the size of support and the immobilized cell concentration, using a strictly aerophilic yeast, Candida lipolytica. The effectiveness factor regarding the oxygen uptake rate of the yeast cells immobilized in spherical agar gel particles was predicted well by a reaction-diffusion equation involving both the experimentally determined diffusion coefficient of oxygen in agar gel and the Michaelis-Menten kinetics for yeast respiration. After one day's incubation at 30℃, the effectiveness factor of the immobilized growing microorganisms (IGM) decreased if the initial effectiveness factor was greater than 0.5; increased if the latter effectiveness factor was not greater than 0.5. In both cases, the effectiveness factor of IGM increased more than the theoreitical value caluculated according to the above reaction-diffusion equation. By measuring the axial distribution of the maximum oxigen uptake rate for IGM in a rod shape in contact with fresh untrient medium at one end, it was shown quantiatively that the amount of actively growing cells per unit volume of the support gel increased with time to a maximum in the region close to the support surface, while it decreased with first order kinetics to a negligible value in the region far from the interface because of cell inactivation brought about by oxygen depletion.
- 公益社団法人日本生物工学会の論文
- 1983-06-25
著者
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SATO Kazuo
Research Center, Asahi Glass Co., Ltd.
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Toda Kiyoshi
Institute Of Applied Microbiology The University Of Tokyo
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Sato Kazuo
Research Center Asahi Glass Co. Ltd.
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Sato Kazuo
Research Institute Of Brewing Tax Administration Agency
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