ON THE EFFECT OF GAMMA-RADIATION ON LIQUID-CRYSTALLINE PROPERTIES OF CHOLESTEROL DERIVATIVES

The influence of gamma radiation on liquid-crystalline properties of c holesterol derivatives was studied. It was found that the temperature of phase transitions depends linearly on the exposure dose in a wide r ange of doses. The lower was the energy of radiation the greater effec ts were observed. The exposure dose ratio did not affect a phase trans ition temperature in a wide range of values. The observed effects were greater for the compounds with shorter molecules and for less uniform ed phases. The change of phase transition temperature was larger for m ixtures than for individual compounds. Initial studies on the mechanis m of radiolysis of cholesterol derivatives were done.