Figure 1.

Effects of different concentrations of the organic extracts of Alpinia oxyphylla on the viability of PC12 cells.

(A–F) Effects of 95% ethanol extracts 1–3 (95% EE-1, 95% EE-2, 95% EE-3), petroleum ether extract, ethyl acetate extract and n-butanol extract on cultured PC12 cell viability. Cells (4 × 10⁴ cells/mL) were treated with different extracts for 24 hours at 37°C after normal culture for 24 hours. *P < 0.05, **P < 0.01, vs. control group (0 μg/mL). Data are expressed as the mean ± SD (n = 5; one-way analysis of variance followed by Dunnett’s post hoc test). EE: Ethanol extract.