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• W4384338440 startingPage "10574" @default.
• W4384338440 abstract "Surface modifications are generally used to functionalize QDots to improve their properties for practical applications, but the relationship between QDot modification and biological activity is not well understood. Using an early staged zebrafish model, we investigated the biodistribution and toxicity of CdSe/ZnS QDots with four types of modifications, including anionic poly(ethylene glycol)-carboxyl ((PEG)n-COOH), anionic mercaptopropionic acid (MPA), zwitterionic glutathione (GSH), and cationic cysteamine (CA). None of the QDots showed obvious toxicity to zebrafish embryos prior to hatching because the zebrafish chorion is an effective barrier that protects against QDot exposure. The QDots were mainly absorbed on the epidermis of the target organs after hatching and were primarily deposited in the mouth and gastrointestinal tract when the zebrafish started feeding. CA-QDots possessed the highest adsorption capacity; however, (PEG)n-COOH-QDots showed the most severe toxicity to zebrafish, as determined by mortality, hatching rate, heartbeat, and malformation assessments. It shows that the toxicity of the QDots is mainly attributed to ROS generation rather than Cd2+ release. This study provides a comprehensive understanding of the environmental and ecological risks of nanoparticles in relation to their surface modification." @default.
• W4384338440 created "2023-07-15" @default.
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• W4384338440 date "2023-07-14" @default.
• W4384338440 modified "2023-10-10" @default.
• W4384338440 title "Surface Modification Determines the Distribution and Toxicity of Quantum Dots during the Development of Early Staged Zebrafish" @default.
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• W4384338440 doi "https://doi.org/10.1021/acs.est.3c01949" @default.
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• W4384338440 hasPublicationYear "2023" @default.
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