2014 Fiscal Year Final Research Report
Atomic-scale analysis of nanominerals and behavior of the associated radionuclides using Cs corrected TEM
| Project/Area Number |
24540516
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 環境ナノ物質 / 電子顕微鏡 |
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| Outline of Final Research Achievements |
This study performed nanoscale analysis of natural nanoparticles that ubiquitously occur on the Earth surface by means of high resolution transmission electron microscopy in conjunction with a variety of bulk analytical techniques. In Fe and Ce oxide nanoparticles, the surface atoms revealed lower coordination number than bulk. The relationship of nanoparticle with environmental nanoparticles was also investigated. After interaction of microorganisms with inert nanoparticles, the microbial metabolisms were slightly affected; The relative composition of the extracellular polymeric substances (EPS) has been changed as revealed by high performance liquid chromatography. Peptide mass finger print analysis of the intracellular substances exhibited an expression of Eno2p, which is involved in glycolysis of metabolism. The impact of EPS on nanoparticle agglomeration was also evaluated and the adsorption of EPS formed steric barrier resulting in stabilization of colloids.
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| Free Research Field |
環境物質科学
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