| Project/Area Number |
17510015
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | University of Shizuoka |
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Principal Investigator |
HASHIMOTO Shinya University of Shizuoka, Institute for Environmental Sciences, 環境科学研究, 助教授 (10228413)
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| Co-Investigator(Kenkyū-buntansha) |
早津 雅仁 静岡大学, 農学部, 教授 (70283348)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2006: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2005: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | methyl iodide / marine bacterium / Alteromonas macleodii / GC-MS / Alteromonas Macleodii / Vibrio splendidus |
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| Research Abstract |
We evaluated the potential of a marine bacterium, Alteromonas macleodii, to produce CH_3I. Bacterium was incubated at temperatures (10,15,20,25,30℃) in marine broth 2216 with or without 1 mmol/L of potassium iodide. From 15 to 30℃, the higher the culture temperature, the more rapid the proliferation rate. Proliferation rate was not affected by potassium iodide. CH_3I was produced between 15 and 30℃ with potassium iodide. Optimum temperature for CH_3I production was 25℃. A. macleodii was also incubated at 25℃ in medium spiked with potassium iodide from 0.1 to 1000μmol/L. Results showed that the greater the concentration of spiked iodide, the more CH_3I was produced. Notably, production of CH_3I strongly increased at over 10μmol/L of potassium iodide. At the concentration of iodine in surface seawater (about 0.4μmon/L), the CH_3I produced was estimated to be about 0.2μmol/L. This suggested that marine bacteria would produce about 2-20 % of CH_3I in surface seawater (the total number of bacteria in medium was 100-1000 times higher than that seen in surface seawater).
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