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. Author manuscript; available in PMC: 2006 Aug 30.
Published in final edited form as: J Agric Food Chem. 2006 Apr 19;54(8):2881–2890. doi: 10.1021/jf052344k

Figure 1.

Figure 1

Cytotoxicity of diluted Frontier Herb Hp Soxhlet ethanol and chloroform extracts. Cytotoxicity (mean % control survival as compared to vehicle control ± SE) of diluted Hp extracts prepared via Soxhlet extraction in (A) ethanol, (B) sequential extraction in chloroform first followed by evaporation to dryness of this first extraction and re-extraction in ethanol, (C) hexane, and (D) chloroform (n = 3–6). A 20 μM concentration of hypericin is the positive control showing 8.4 (±4.3)% survival after light exposure and 73.5 (±2.2)% survival relative to the control in the dark, which are significantly different from each other. ** = p < 0.0001 and * = p < 0.01 significantly different cell growth survival as compared to DMSO solvent control. ## = p < 0.0001 and # = p < 0.01 significantly different cell growth survival after exposure to 30 min of ambient light as compared to the dark incubation.