Half-Life, Effective 1
Half-Life, Effective 1 : The period during which the quantity of a radionuclide in a biological system is reduced by half by interaction of radioactive decay and excretion due to biological processes. Teff = (Tphys Tboil) / (Tphys + Tboil). Where as Tphys = Physical Half-Life, and Tbiol = Biological Half-Life.