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. Author manuscript; available in PMC: 2014 Aug 20.
Published in final edited form as: Environ Sci Technol. 2013 Aug 2;47(16):9132–9139. doi: 10.1021/es304987r

Figure 1. Toxicity to zebrafish embryos of intact and oxidatively weathered PEG5000-CdSecore/ZnSshell quantum dots (QDs).

Figure 1

(a) Dose-response relationships for mortality at 120 hours post fertilization (hpf) induced by intact and weathered QDs. Data for CdCl2 shown as a reference. (b) Morphological malformations at 120 hpf resulting from exposure to 20 μM Cd equivalents of as-synthesized QDs, weathered QDs or CdCl2. Morphological endpoints of toxicity included altered axial curvatures (aac), yolk sac malformations (ysm), pericardial edema (pe), tail malformations (tm), ocular edema (oe), opaque tissues and craniofacial malformations (cfm). In (a), calculated LC50 values (95% confidence intervals, CI95%) for PEG5000-QD, weathered PEG5000-QDs, and CdCl2 were 42 (CI95%: 24-75), 14 (CI95%: 9-21), and 409 (CI95%: 270-563) μM Cd equivalents, respectively.