Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport
文献类型：期刊论文
| 作者 | Chen DL(陈栋梁) ; Li, WW; Yu, HQ; Ma, JY; Chen, DL; Peng, Y; Tian, LJ
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| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2017 |
| 卷号 | 7页码:4370 |
| ISSN号 | 2045-2322 |
| DOI | 10.1038/s41598-017-04694-6 |
| 文献子类 | Article |
| 英文摘要 | The discharge of engineered nanomaterials (ENMs) into environment is raising widespread concern not only due to their direction bio-toxicity but also their bio-concentration and bio-magnification through food web. However, the transformation and distribution of ENMs during food-chain transport are poorly understood, due to lack of accurate, reliable analytical methods. In this study, by using a suite of advanced spectrum techniques, we successfully tracked the distribution and biotransformation dynamics of CdSe quantum dots (QDs) during their transport from Shewanella onedensis to Caenorchabditis elegans in predation. Fluorescence microscopy and Raman mapping showed that the ingested QDs by C. elegans were located at the gut lumen and subcutaneous tissue, and were partially excreted from the nematode body over time. Micro-X-ray fluorescence (mu-XRF) spectroscopy and Se K-edge X-ray absorption fine structure (XAFS) results further revealed the changed distribution of Se element over time, and a shift in the major Se species from CdSe to Se-0 and Na2SeO3 IV. This work demonstrates the utility of advanced spectral techniques for characterizing QDs in vivo, and may facilitate a better understanding on the environmental transformation and fates of ENMs. |
| WOS关键词 | RAY-ABSORPTION SPECTROSCOPY ; CAENORHABDITIS-ELEGANS ; SILVER NANOPARTICLES ; RAMAN-SCATTERING ; EXPOSURE |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000404332100008 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284862]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_加速器中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Chen DL,Li, WW,Yu, HQ,et al. Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport[J]. SCIENTIFIC REPORTS,2017,7:4370. |
| APA | 陈栋梁.,Li, WW.,Yu, HQ.,Ma, JY.,Chen, DL.,...&Tian, LJ.(2017).Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport.SCIENTIFIC REPORTS,7,4370. |
| MLA | 陈栋梁,et al."Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport".SCIENTIFIC REPORTS 7(2017):4370. |
入库方式： OAI收割
来源：高能物理研究所
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