. The basic aspects of radiation effects on living systems. Radiation -- Physiological effect. 376 ENERGY LOSS AND BIOLOGICAL EFFECTS Dulbecco (36) for ultraviolet-ray-induced effects, was tried. This model was used when the lethality of ultraviolet rays was tested on bacterio- phage, attached singly or doubly to bacteria. Applying the model to the haploid yeast cell, we may calculate the number of cells N which survive and form large colonies, when initially A^o are irradiated by dose D. N = Noe-""^ (9) where n — number of independent sites essential to cell division and inactivated
. The basic aspects of radiation effects on living systems. Radiation -- Physiological effect. 376 ENERGY LOSS AND BIOLOGICAL EFFECTS Dulbecco (36) for ultraviolet-ray-induced effects, was tried. This model was used when the lethality of ultraviolet rays was tested on bacterio- phage, attached singly or doubly to bacteria. Applying the model to the haploid yeast cell, we may calculate the number of cells N which survive and form large colonies, when initially A^o are irradiated by dose D. N = Noe-""^ (9) where n — number of independent sites essential to cell division and inactivated by a single intermediate molecule or radical. a = ^ap/w = constant (see Eq. 3). D = dose. Haploid yeast SC7 and SC8. Normal , ^^ , N = Noe Diploid yeast SC6 nhibited Normal. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Symposium on Radiobiology (1950 : Oberlin College); Nickson, James J. New York, Wiley
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