Özet:
This study was carried out to investigate whether there are any inhibitions of bovine liver catalase (CAT) activity by lambda cyhalothrin and fenthion pesticides. CAT activity was inhibited by increasing lambda cyhalothrin and fenthion pesticides concentrations from 0 to 500 ppm. Under the exposure of 25, 50, 100, 250 and 500 ppm lambda cyhalothrin concentrations, % CAT enzyme activity decreases were calculated as 3.4; 11.7; 12.7; 21.2 and 22.5%, respectively. Under the exposure of 25, 50, 100, 250 and 500 ppm fenthion concentrations, % CAT enzyme activity decreases were calculated as 4.6; 6.2; 6.7; 17.1 and 19.9%, respectively. Lambda cyhalothrin inhibited CAT non-competitively and fenthion inhibited CAT competitively.
