| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
Selenium and tellurium have the rarity as rare element, and the effective method for recovery and recycling of selenium and tellurium under mild conditions, has been required. As selenium (Tellurium) -oxyanion which is one of the oxide form of Se (Te) is toxic to various organisms, the simple and practical technique for detoxification of Se (Te) -oxyanions is necessary. In this study, we searched for and isolated microbes capable of reducing Se (Te)-oxyanions into elemental Se (Te) nano-spheres from deep-sea sediments. Furthermore, the biochemical and culture properties, phylogenetic analysis, and the possibility of the nano-sphere formation were investigated. Formation of nano-sphere which consist of almost pure Se (Te) due to deep-sea isolates that were identified as Shewanella spp. was confirmed by the TEM observation and the EDS analysis. In addition, it was suggested that the isolates were also available for the synthesis of fine particles of rare elements such as silver.
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