It is shown that substances with a distinct radioprotective effect sulfur-containing, of the phenol type affect most markedly the kinetics of prolonged afterglow in irradiated serum albumin. The same substances affect the kinetics even more markedly if added prior to the irradiation, but in the latter case the conditions of experiment do not always make it possible to take in account the portion of light absorbed by the protective substance. By contrast, substances with a feeble radioprotectant effect insignificantly affect the kinetics of afterglow. These findings warrant the assertion that research into the mechanism of the process of prolonged afterglow may shed light on certain aspects of the primary effect of radiation.
Trans. of Akademiya Nauk SSSR. Doklady, v162 n3 p691-693 1965.