Study on formation mechanism of radural teeth of chiton which is composed with magnetite, and application for environmental and material science

Research Project

Project/Area Number	24310064
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Partial Multi-year Fund
Section	一般
Research Field	Environmental technology/Environmental materials
Research Institution	Chiba University
Principal Investigator	Numako Chiya 千葉大学, 理学(系)研究科(研究院), 准教授 (80284280)
Project Period (FY)	2012-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000) Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000) Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000) Fiscal Year 2012: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Keywords	ヒザラガイ / 生体濃縮 / 環境モニタリング / キチン / 吸着 / 希土類元素 / PIXE / 原子吸光 / 歯舌 / 高濃度濃集 / リン酸化 / 吸着能 / 生体鉱物化現象 / 地球表層物質循環 / 可搬型蛍光X線分析装置 / オンサイト分析
Outline of Final Research Achievements	Transportation of iron from environmental material till radular teeth of chiton and its formation process of magnetite, major material of tooth cups were investigated in order to elucidate formation of the teeth of chiton which are composed with magnetite. Monitoring of Sr or REEs using bio-accumulation abilities of chitons was also examined in this study. Accumulation of Sr into the teeth of chiton was observed with micro PIXE analyses. In addition, Fe and Ca absorption experiments to chitin or phosphate treated showed that phosphate treatment enhanced accumulation of metal irons to chitin.