| 학회 | 한국화학공학회 |
| 학술대회 | 1999년 봄 (04/23 ~ 04/24, 성균관대학교) |
| 권호 | 5권 1호, p.929 |
| 발표분야 | 분체공학 |
| 제목 | 패각형성에서 나노복합체와 유기물과의 상관관계에 대한 연구 |
| 초록 | The oyster shell consists of mineralized composites of calcium carbonate, the most common biomineral, and macromolecules in an exquisitely controlled manner[1],exhibiting exceptional nanoscale regularity and strength that could overcome the intrinsicbrittleness of the crystals. The higher-order architecture results from the presence oforganic matrix that creates defects in the perfect lattice which, in turn, enhance thefracture toughness by both absorbing stress and deviating the propagation of cracksalong the cleavage planes of calcium carbonate[2]. It has been proposed that theinteraction of proteins with specific inorganic crystal planes is governed by intrinsicstereochemical recognition of the macromolecules[3]. Recently some results showed theconformation-dependent control of calcite crystal growth by a peptide of definedsecondary structure[4], and suggested the construction a polypeptide that could bind to aspecific surface of a growing calcite crystal and alter its morphology would be possible.In this study, we specifically discuss shell formation of oyster, Crassostrea Gigas,which is a composite of crystallographically highly ordered calcium carbonate withintracrystalline proteins. The investigation of the structural relationship between organicmatrix calcium carbonate is the main subject. The approach taken was to extractquantitative information on the shell protein structure in vivo using Fourierself-deconvolution analysis of amide 1 band spectra[5] obtained from FTIR spectroscopy.And in order to establish the correlation between morphological modification andpolymorphic behavior, the effect of secondary structure variations on the shell formationwas studied from calcium carbonate formation in the presence of proteins extracted fromwithin biominerals. Also structure and texture in shell were investigated by wide-angleX-ray diffractometer. In particular, features of the coherence length to mineral tissueswere interesting subject to be investigated. The results provide evidence on the role ofprotein structure in the calcification of shell and the methods for understanding theprinciples that govern shell formation. |
| 저자 | 김용완, 최청송 |
| 소속 | 서강대 |
| 키워드 | nanocomposite; intracrystalline protein; calcite; aragonite; oyster shell |
| 원문파일 | 초록 보기 |
