Fig. 1

Activity of catalase and SOD after microorganism incubation with various substrates (logarithmic scale): Cat - catalase specific activity (MME/mg of protein), SOD - superoxide dismutase specific activity (s.u./mg of protein × minutes), Control - basic mineral salt medium with addition of 0.5 % yeast extract and 0.5 % of tryptone, Dec - decane, HDec - hexadecane, RAF - resins and asphaltenes fractions, and Oil - crude oil as the only source of carbon. a - A. calcoaceticus EMBM-06 b - A. calcoaceticus VKPM B-10353. Differences from the control for all the data sets are statistically significant (p < 0.05)