Dynamics of sheet nacre formation in bivalves |
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Authors: | Marthe Rousseau Anders Meibom Marc Gze Xavier Bourrat Martine Angellier Evelyne Lopez |
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Institution: | aUMR 7561 CNRS-Nancy University, BP 184, 54505 Vandoeuvre les Nancy, France;bNational Museum of Natural History, LEME, 61, rue Buffon, 75005 Paris, France;cNational Museum of Natural History, USM 504, 61, rue Buffon, 75005 Paris, France;dOrléans University-CNRS, ISTO, 1A rue de Férollerie, 45071 Orléans Cedex 2, France;eNational Museum of Natural History, BOME, 43 rue Cuvier, 75005 Paris, France |
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Abstract: | Formation of nacre (mother-of-pearl) is a biomineralization process of fundamental scientific as well as industrial importance. However, the dynamics of the formation process is still not understood. Here, we use scanning electron microscopy and high spatial resolution ion microprobe depth-profiling to image the full three-dimensional distribution of organic materials around individual tablets in the top-most layer of forming nacre in bivalves. Nacre formation proceeds by lateral, symmetric growth of individual tablets mediated by a growth-ring rich in organics, in which aragonite crystallizes from amorphous precursors. The pivotal role in nacre formation played by the growth-ring structure documented in this study adds further complexity to a highly dynamical biomineralization process. |
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Keywords: | Biomineralization Calcium carbonate Nacre SEM SIMS |
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