Fig. 3

Effects of SBT twig and leaf extracts (0.5–50 μg/mL; 15 min (a) and 60 min (b)) on plasma protein carbonylation induced by H₂O₂. In these experiments the carbonyl group level (marker of protein oxidation) in control samples (plasma treated only with H₂O₂) was 17.1 ± 4.3 nmol/mg of plasma protein. Data represent means ± SD of 6–12. The effect of five different concentrations of two tested extracts (0.5, 1, 5, 10 and 50 μg/mL; for 15 min) was not statistically significant (p > 0.05 (n.s.)) in comparison to control. The effect of two different concentrations of SBT twig extracts (0.5 and 1 μg/mL; for 60 min) was not statistically significant (p > 0.05 (n.s.)) in comparison to control. The effect of one concentration of SBT leaf extract (0.5 μg/mL; for 60 min) was not statistically significant (p > 0.05 (n.s.)) in comparison to control. The effect of three different concentrations of SBT twig extracts (5, 10 and 50 μg/mL; for 60 min) was statistically significant (*p < 0.05), in comparison to control. The effect of four different concentrations of SBT leaf extracts (1, 5, 10 and 50 μg/mL; for 60 min) was statistically significant (*p < 0.05), in comparison to control. The effects were not statistically significant: SBT twig extract-treated plasma vs. SBT leaf extract-treated plasma (for 15 and 60 min, p > 0.05 (n.s.); for all tested concentrations- 0.5 - 50 μg/mL). black diagram – control, white diagram – twig, grey diagram - leaf