Abstract
COMPARING the in vitro calcium-45 uptake by bone salts (ashed by a method slightly modified from that of Gabriel) from alcoholic and aqueous calcium-45 labelled calcium chloride solutions, we have been able to demonstrate the occurrence of remodelling phenomena (chemical reaction between the solid and the ions dispersed in the liquid phase, recrystallization sensu stricto) and of an isoionic exchange, which reaches an equilibrium when 8 per cent of the calcium ions of the solid are involved. All remodelling processes being discarded, we believe that this figure corresponds to a pure exchange value. In our conditions, the intracrystalline ion exchange by thermal vibration is too slow to interfere with the surface exchange process1.
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RICHELLE, L., DALLEMAGNE, M. Calcium Exchange of Bone Salts considered as a Measure of the Crystal Surface. Nature 190, 165 (1961). https://doi.org/10.1038/190165a0
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DOI: https://doi.org/10.1038/190165a0
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