2016 Fiscal Year Final Research Report
Study on chemical structure and origin of pigment composition in skeletons of precious corals
| Project/Area Number |
15K12184
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 宝石サンゴ / 微量元素 / 色彩 / 放射光 / マッピング分析 |
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| Outline of Final Research Achievements |
Precious corals have been commercially exploited for many centuries all over the world. Skeletons of precious corals consist of calcium carbonate, and have been used as amulets or gemstones since ancient times. In this project, several Corallium species (C. rubrum, C. elatus, C. konojoi, and P. japonicum) were collected from the Mediterranean Sea and Pacific Ocean, and studied on chemical structure and origin of pigment composition in skeletons of precious corals. We established a new analytical method for carotenoids complexed with proteins in the skeletons of the Japanese corals using an ultra-performance liquid chromatography quadrupole time of flight mass spectrometry. This study also investigated the distribution of sulfur (S), phosphorus (P), nitrogen (N) and alkali earth elements using micro X-ray fluorescence, and the speciation of sulfur using X-ray absorption near edge spectroscopy (XANES) along the annual growth rings in the skeletons.
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| Free Research Field |
水圏化学
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