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1 Indiana University, Department of Physiology and Department of Chemistry, Bloomington, Ind.
1. Fluorine added to the blood acts as a vasodilator. Flow increases may be elicited by 0.15 mg. or more fluorine, and amounts in excess of 5 mg. result in a decline in blood pressure.
2. The cation of a fluoride compound influences its activity. The order of activity of 4 fluorides studied was SnF2, KF, Na2PO3F, and NaF.
3. The action of fluorine is longer than most vasodilators, and concomitant studies of respiration and muscle temperatures suggest that it may act to depress body cell metabolism, in the higher concentrations studied.
4. It is believed that these findings suggest a mechanism by which fluorine may stimulate the flow of saliva which has been reported but not well explained.
Submitted on April 10, 1954
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