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Regulatory Peptides Are Susceptible to Oxidation by Metallic Impurities within Carbon Nanotubes

机译:调节肽很容易被碳纳米管中的金属杂质氧化。

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In this article, we show that the redox properties of the regulatory peptide L-glutathione are affected by the presence of nickel oxide impurities within single-walled carbon nanotubes (SWCNTs). Glutathione is a powerful antioxidant that protects cells from oxidative stress by removing free radicals and peroxides. We show that the L-cysteine moiety in L-glutathione is responsible for the susceptibility to oxidation by metallic impurities present in the carbon nanotubes. These results have great significance for assessing the toxicity of carbon-nanotube materials. The SWCNTs were characterized by Raman spectroscopy, high-resolution X-ray photoelectron spectroscopy. transmission electron microscopy, and energy dispersive X-ray spectroscopy.
机译:在本文中,我们表明,调节肽L-谷胱甘肽的氧化还原特性受单壁碳纳米管(SWCNT)中氧化镍杂质的存在影响。谷胱甘肽是一种强大的抗氧化剂,可通过清除自由基和过氧化物来保护细胞免受氧化应激。我们表明,在L-谷胱甘肽中的L-半胱氨酸部分是由碳纳米管中存在的金属杂质引起的氧化敏感性。这些结果对评估碳纳米管材料的毒性具有重要意义。通过拉曼光谱,高分辨率X射线光电子能谱表征SWCNT。透射电子显微镜和能量色散X射线光谱。

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