STRONTIUM IN MAN AND BEAST 



Anderson*' have calculated the ^°Sr/Ca equilibrium in the bones of ado- 

 lescents taking both accretion and remodelling into account. They derive 

 figures which are in close agreement with those observed Ijy Kulp et alJ^. 

 This mav be fortuitous as both sets of authors made some rather shaky 

 assumptions. However, if the procedure is valid it provides support for the 

 concept that the behaviour of "°Sr in the body can be predicted from the 

 intake of ®"Sr and calcium. 



At these periods of life, because in mixed diets ^Sr and calcium can be in 

 fairly constant equilibrium, measurement of them can have some prognostic 

 value in predicting '•"'Sr values for bone. 



CONCLUSION 



If the above deductions and speculations are valid, the important factors to 

 determine if we wish to predict the concentration in bone of ''"Sr, are the 

 average daily intakes of ^^Sr and calcium. Determinations of *Sr and the 

 derivation of specific activity of ^''Sr/Sr give indications merely of the degree 

 to which ^"Sr and strontium have equilibrated. On the basis of present-day 

 observations on food and bone, I have therefore attempted to predict some 

 of the values on which there are so far no published data, {Figure 1). I do 

 this in the hope of stimulating those with clinical material to make the 

 observations. 



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124 



