Abstract
Summary
Relatively high concentrations of barium (1 to 1000 μg per ml) reduce the area of outgrowth of chick fibroblasts propagated in a medium containing fowl plasma and chick embryo extract. But these same concentrations of barium do not shorten the period of survival of chick embryo mesenchyme tissues maintained in a synthetic medium. Chemical analyses showed the barium content of the natural and synthetic media that were used to be less than 5 μg per 10 ml.
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