RESUMO
The effects of five new derivatives of 2,6-dialkyl-4-propylphenole containing in para-radical different ionogenic groups (-SO3Na, -S-SO3Na, -S-(NH2)2Cl) in the presence and in the absence of hydrogen peroxide on the survival of E. coli AB1157 cells and its isogenic strain defective in repair enzyme genes were studied. Cell survival treated with hydrogen peroxide was remarkably increased in the presence of (3-(3,5-dimethyl-4-hydroxyphenyl)propyl)-1-sulphonate of sodium (Cl). Replacement of methyl ortho-radicals in the structure of Cl for tret-buthyl or cyclohexyl groups led to a decrease of the compounds ability to protect the cells from exogenic hydrogen peroxide. Between derivatives of 2,6-di-tret-buthylphenol the compound with thiosulphonate group demonstrated properties comparable with those for its sulphonate analog, then a chloride of isotiurone at concentration 3 mM completely suppressed the growth of cells in presence and in the absence of H2O2. Compound Cl may be considered as most perspective for detail analysis as antioxidant.
