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Phase contrast microscopy. (A) Controls showing untreated Vero normal kidney epithelial cells. Cytotoxic activity of ethyl acetate vapor saturated flasks at (B) 0.02 M, (C) 0.026 M, (D) 0.03 M, (E) 0.034 M, (F) 0.04 M, (G) 0.05 M, (H) 0.1 M, and (I) 0.2 M on Vero cells after 48 hours (magnification 10×).
