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Figure 2 Assessment of effects by copper-plated coin. (a) Effects of US 1 cent coin on developing embryos (n = 10) at differential stages of development, indicating time point of exposure to penny: 1-cell (~0.25 hours post fertilization or hpf), sphere (~4 hpf), bud (~10 hpf), 10-somite (~14 hpf); control: embryos in egg water (no addition). (b) Magnification of representative image for relevant stages and time points. Scale bars: 200 μm. (c) Survival curve showing percent mortality at indicated stages and time points.
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