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Reductions in E. coli O157: H7 counts after photosensitization with curcumin in solution and S465 micelles at (A) pH 3.5, (B) pH 5, and (C) pH 7.4. Capital letters indicate differences between irradiated and non-irradiated samples. Lower-case letters indicate differences within treatments (irradiated vs. non-irradiated). Means with same letters are not significantly different (p > 0.05).
