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The number of survivors in cosmetic preparations, either without ZnO NP (C) or containing unirradiated and γ-irradiated ZnO NP, with time.
Note: (A) Sunblock, (B) foundation cream, (C) moisturizing cream, (D) body lotion, (E) face cream, (F) body scrub.
Abbreviation: ZnO NP, zinc oxide nanoparticles.
