TITLE

Microstructure and chemical composition of giant avian eggshells

AUTHOR(S)
Dauphin, Yannicke; Cuif, Jean-Pierre; Salomé, Murielle; Susini, Jean; Williams, C. Terry
PUB. DATE
December 2006
SOURCE
Analytical & Bioanalytical Chemistry;Dec2006, Vol. 386 Issue 6, p1761
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The microstructure and composition of the layers of two giant avian eggshells were investigated using a combination of scanning electron microscopy, electron probe microanalyses, and X-ray absorption near-edge structure spectroscopy (XANES). The two species have some similarities and differences in their microstructure and composition; the composition is not homogeneous throughout the eggshell thickness. XANES studies show that sulfur is associated with amino acids in the inner organic membranes, whereas in the mineralised layers the sulfur is mainly associated with sulfated polysaccharides. These results are similar to those obtained on chicken eggshells, and confirm the active role of sulfated acidic polysaccharides in biomineralisation processes of carbonate skeletons.
ACCESSION #
23150728

 

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