abs

학술발표회초록보기

초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Evaluation of teeth of chiton accumulating magnetite (Fe3O4) as a major material

등록일
2015년 9월 9일 16시 38분 24초
접수번호
1410
발표코드
ANAL1-1 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 13시 : 00분
발표형식
심포지엄
발표분야
분석화학 - Diverse Technologies in Spectroscopy - Joint Symposium with JAIMA
저자 및
공동저자
Chiya Numako
Chiba University, Japan, Korea
※ 국외소속으로 등록된 저자의 승인여부는 최소 3일이내 발표자 email로 알려드립니다.
승인 1건

Chitons are well known to have special strong teeth accumulating iron oxides, especially magnetite (Fe3O4), and calcium phosphates as major components. In the case of Japanese chiton Acanthopleura japonica, about 80 pairs of the iron teeth (ca. 400 x 200 x 500 mm3) locate on a radula with their maturation sequence which can be divided into five stages from their mineral composition and appearance. The teeth was soft with organic flame work consist of chitin in the first maturation stage, and their color turns into reddish-brown with amorphous iron (III) components in the flame at the second stage. The posterior edge of a tooth where is main place for feeding accumulates magnetite abruptly at the thierd stage, and its abundance of magnetite increased until 60th teeth on a radular teeth, the fourth stage. Other mineral components can be observed in the later maturation stages; at third stage with red color, goethite (α-FeOOH) and lepidocrocite (γ-FeOOH) are stored at posterior surface of the tooth, and finally the posterior part of the tooth is filled with hydroxyapatite (Ca10(PO4)6(OH)2) at final maturation stage. The hardness of the teeth was much higher than those of other marine creature at intertidal zone because of the magnetite. In this study, nano-indentation technique was applied in order to evaluate of the mechanical property of the teeth of chiton and their variation through the teeth maturation on a radular teeth. Meterial scientific properties of the teeth of chiton has been investigated with ICP-AES, EPMA, FE-SEM, X-ray diffraction, IR, Mossbauer, Raman and X-ray Absotption spectroscopy.


상단으로