Kinetic studies on citric acid production by Aspergillus niger. I. Phases of mycelium growth and product formation.

A Chmiel
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Abstract

The physiology and growth kinetics of Aspergillus niger B-64-5 in shaken culture were studied, five successive phases of citric acid fermentation being distinguished. Growth was found to be diauxic, spore germination being followed by an exponential growth phase, then a period of growth disturbance, and last of all a phase of secondary growth, characterized by a constant coefficient of growth decline appeared. The citric acid production started in the phase of growth disturbance. The chief increase in citric acid concentration took place in the production phase, i.e. in the last fermentation phase.

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黑曲霉产柠檬酸的动力学研究。1 .菌丝生长和产物形成的阶段。
研究了黑曲霉B-64-5在摇摇培养中的生理和生长动力学,区分了柠檬酸发酵的5个连续阶段。孢子萌发后进入指数生长阶段,然后进入生长干扰期,最后进入以生长衰减系数恒定为特征的二次生长阶段。柠檬酸生产开始于生长扰动期。柠檬酸浓度的增加主要发生在生产阶段,即发酵的最后阶段。
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Soil microflora of the rhizosphere of plants from several habitats in the botanical garden in Poznań. Kinetic studies on citric acid production by Aspergillus niger. II. The two-stage process. L-Glutamate-glyoxylate aminotransferase in Lactobacillus plantarum. Studies on growth, nitrogen fixation and protein synthesis in a blue-green alga Calothrix sp. Effect of simazine on growth of microorganisms and decomposition of this preparation in various types of soil.
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