Fig. 2

Effects of SBT twig and leaf extracts (0.5–50 μg/mL; 15 min (a) and 60 min (b)) on plasma lipid peroxidation induced by H₂O₂/Fe. In these experiments, the TBARS level (marker of lipid peroxidation) in control samples (plasma treated with only H₂O₂/Fe) was 0.341 ± 0.078 nmol/mL of plasma. Data represent means ± SD of 5–10. The effect of two different concentrations of two tested extracts (0.5 and 1 μg/mL; for 15 and 60 min) was not statistically significant (p > 0.05 (n.s.)) in comparison to control. The effect of two different concentrations of SBT leaf extract (10 and 50 μg/mL; for 15 min) was not statistically significant (p > 0.05 (n.s.)) in comparison to control. The effect of three different concentrations of SBT twig extract (5, 10 and 50 μg/mL; for 15 min) was statistically significant (*p < 0.05, **p < 0.005) in comparison to control. The effect of one concentration of SBT leaf extract (5 μg/mL; for 15 min) was statistically significant (*p < 0.05) in comparison to control. The effect of three different concentrations of two tested extracts (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 min: p > 0.05 (n.s.), for all tested concentrations- 0.5 - 50 μg/mL); for 60 min (p > 0.05 (n.s.), for tested concentrations: 0.5, 1 and 10 μg/mL). The effects were statistically significant: SBT twig extract-treated plasma vs. SBT leaf extract-treated plasma, (for 60 min, p < 0.05 for tested concentrations: 10 and 50 μg/mL). black diagram – control, white diagram – twig, grey diagram - leaf