radioactive calcium

radioactive calcium

Any of the radionuclides of calcium, the most common of which are the beta-emitting 45Ca, which has a half-life of 163 days, and the beta and gamma-emitting 47Ca, which has a half-life of 4.5 days and has some currency as a tracer for calcium metabolism studies.
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While radioactive and non radioactive calcium isotopes were employed to study the active transport and passive transport of calcium, transport of labelled mannitol was taken as a measure of passive permeability.
In the rush to develop "peaceful uses of the atom" in the years following testing of the H-bomb, much interesting work was done with radioactive calcium isotopes ([sup.
At Columbia University and Montefiore Hospital in New York City, twelve terminally ill cancer patients were injected, in the late 1950s, with concentrations of radioactive calcium and strontium-85 in an attempt to measure the rate at which radioactive substances were absorbed into various human tissues.