Alkaline Shift Effect on the Uptake of Germanium by Algae, Chlorella ellipsoideae, Oscillatoria sp. and Spirulina platensis

概要

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The uptake of germanium (Ge) by microalgae was interesting because of a therapeutic effect of organic germanium. In the case of blue green algae, Oscillatoria sp. and Spirulina platensis, satisfactory amounts of Ge were accumulated in the cells, where the pH of the culture was shifted to 11.8 or 12.3,after sufficient growth. These algae could hardly grow in a culture at pH 11.8 or pH 12.3. In the case of Chlorella ellipsoideae, a good result could not be obtained. But a relatively high uptake of Ge into the cells could be obtained in the culture shifted to pH 8.6,in which the alga could hardly grow. Although the effective pHs are different, the effect of the elevated pH of the cultures can be called an alkaline shift efect from the same feature.
1983-06-25