025 to about 10 joules cm 2 preferably from about 0 1 to about 3 0 joules cm 2 may advantageously be used preferably four such lamps are used the time for which the aliquot is subjected to the stressors is normally within the time range of up to about 60 minutes the time depends to some extent upon the chosen intensity of the electromagnetic emission the temperature the concentration of the oxidizing agent and the rate at which it is supplied to the aliquot some experimentation to establish optimum times may be necessary on the part of the operator once the other stressor levels have been set under most stressor conditions preferred times will be in the approximate range of from about 2 to about 5 minutes more preferably about 3 or about 3 u00bd minutes the starting blood temperature and the rate at which it can be warmed or cooled to a predetermined temperature tends to vary from subject to subject such a treatment provides a modified blood aliquot which is ready for injection into the subject in the practice of the preferred process of the present invention the blood aliquot may be treated with the stressors using an apparatus of the type described in u s pat no 4 968 483 to mueller the aliquot.