| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
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| Outline of Final Research Achievements |
This project aimed to understand interaction between actinides nanoparticles - microorganisms for a possible implication to actinides migration surrounding deep underground repository. We have elucidated the nanocrystallization processes of lanthanides (surrogate of actinides) phosphate in the P-free initial solution, which was released with extracellular polymeric substances (EPS)from microorganisms (S. Cerevisiae). Colloidal stability of Ln oxides nanoparticles was enhanced by EPS adsorbed to the nanoparticles. In addition, Ln oxides nanoparticles were experimentally exposed to S. Cerevisiae. The proportion of extra-cellular polymeric substances changes by the presence of nanoparticles and a protein involved in glycolysis system. The results indicate that migration of actinides mediated by biogenic and natural nanoparticles is constrained by the complex interaction between microorganisms and nanoparticles.
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