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Possible factors affecting nano-ZnO cytotoxicity in various media
| Factor/medium | Serum-free DMEM | DMEM/5 % FBS | DMEM/10 % FBS |
|---|---|---|---|
| Secondary size | Large | Small | Small |
| Sedimentation rate | Fast | Slow | Slow |
| Zinc ion release | Low | – | High |
| Protein protection | No | Yes | Yes |
| Cell growth rate | Slow | Medium | Fast |
| Resultant toxicity | High | Medium | Low |
