Nanostructures de la nacre des tests de céphalopodes actuels

@article{Dauphin2001NanostructuresDL,
  title={Nanostructures de la nacre des tests de c{\'e}phalopodes actuels},
  author={Yannicke Dauphin},
  journal={PalZ},
  year={2001},
  volume={75},
  pages={113-122}
}
  • Y. Dauphin
  • Published 1 August 2001
  • Materials Science
  • PalZ
The structures of the two types of nacreous layers previously described in cephalopod shells were studied with AFM (atomic force microscopy). The comparison of these results with those of SEM (scanning electron microscopy) and TEM (transmission electron microscopy) studies shows similarities and differences. Nacreous lamellae are composed of fibrillar crystallites, but these crystallites may not be composed of smaller elongated and parallel crystallites. Fibrillar crystallites seem to be… 

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References

SHOWING 1-10 OF 15 REFERENCES

Ultrastructural Characteristics of the Nacre in Some Gastropods

TLDR
The nacreous layer in Gibbula, Calliostoma, Trochus and Haliotis is described on the basis of scanning electron microscopic studies and the mechanical properties of the nacre, and the effects of the interlamellar conchiolin membranes upon the nucleation of the tablets are discussed.

Macromolecules in mollusc shells and their functions in biomineralization

Mollusc shells are used as a model for studying ‘organic-matrix -mediated’ biomineralization, in which crystals are nucleated and grow in a pre-formed structural framework composed of proteins and

TOPOGRAPHY OF THE ORGANIC COMPONENTS IN MOTHER-OF-PEARL

  • C. Grégoire
  • Materials Science
    The Journal of biophysical and biochemical cytology
  • 1957
TLDR
The present results support former conclusions with regard to the existence of taxonomic differences between Cephalopods, Gastropods, and Pelecypods in the morphological organization of the organic phase within mother-of-pearl.

The nacreous layer in Mytilus, Nucula, and Unio (Bivalvia). Crystalline composition and nucleation of nacreous tablets.

  • H. Mutvei
  • Materials Science
    Calcified tissue research
  • 1977
Etching with the glutaraldehyde-acetic acid solution reveals that the nacreous tablets in Mytilus, Nucula, and Unio are composed of four crystal individuals which occur in two structurally different

Nautilus hard parts: a study of the mineral and organic constitutents

The mineralized hard parts of Nautilus, including the mandibles, statoconia, and uroliths, are more complex with respect to ultrastructure, mineralogy, trace element, and isotopic composition than

STUDIES ON SHELL FORMATION

  • N. WatabeK. Wilbur
  • Materials Science
    The Journal of biophysical and biochemical cytology
  • 1961

Diagenese comparee des phases minerales et organiques solubles dans les tests aragonitiques de nautiles et d'ammonites

The compositions of both organic and mineral parts of shells of Nautilus macromphalus, a Cenozoic nautiloid and Jurassic ammonites are compared. The microstructures of the fossil shells show minor

Using Plasma-Etching and Proteolytic Enzymes in Studies of Molluscan Shell Ultrastructure

As in all mineralized tissues, the mineral components of the molluscan shell are associated with complex organic matrices. In order to study shell ultrastructure with the SEM the shell must first be