An empirical model for predicting the color variation of biologic molecules as a function of irradiation dose

The effect of 60Co source γ-radiation on β-carotene and chlorophyll-b solutions and on methyl blue dye fixed on cotton fabric has been investigated by colorimetric measurements. For the three reactive pigments, the result obtained shows that the power-law function can be used to predict the value of color difference according to γ-radiation dose. This same behaviour was observed during examination of many other published data. Based on these observations, the power-law function has been proposed as an empirical distribution for modeling the color variation of biologic molecules as a function of irradiation dose.