Abstract
The decay curves were determined from measurements of the pulse rate of radioactively labeled compounds on live insects by means of a FORTAN 7090 computer programme. The biological half-lives are calculated therefrom on the basis of formulae which are given. an exact mathematical method with rational data processing produced reproducible results. The method was tested with various kinds of bugs. Water bugs secrete the tracers used more quickly than bed bugs. For phosphate and iodide the biological half-life for bed bugs amounted to about 50 days and for water to amounted to about 50 dyas and for water bugs to 3 days. Half of the rubidium chloride, on the other hand, was eliminated by bed bugs within 1 1 2 days.
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