Data/hora: 06/06/2024 07:31:41

Provedor de dados: 	5	
País: 	France	
Título: 	Evidence of a Biological Control over Origin, Growth and End of the Calcite Prisms in the Shells of Pinctada margaritifera (Pelecypod, Pterioidea)	
Autores: 	Cuif, Jean-pierre; Burghammer, Manfred; Chamard, Virginie; Dauphin, Yannicke; Godard, Pierre; Le Moullac, Gilles; Nehrke, Gernot; Perez-huerta, Alberto.	
Data: 	2014-12	
Ano: 	2014	
Palavras-chave: 	Biomineralization; Bivalve shell; Microstructure; Calcite prisms.	
Resumo: 	Consistently classified among the references for calcite simple prisms, the microstructural units that form the outer layer of the Pinctada margaritifera have been investigated through a series of morphological, crystallographical and biochemical characterizations. It is often said that the polygonal transverse shape of the prisms result from the competition for space between adjacent crystals. In contrast to this classical scheme the Pinctada prisms appear to be composed of four successive developmental stages from the concentrically growing disks on the internal side of the periostracum to the morphological, structural and compositional changes in both envelopes and mineral components at the end of the prisms. These latest structural and compositional changes predate nacre deposition, so that the end of prism growth is not caused by occurrence of nacre, but by metabolic changes in the secretory epithelium. This sequence makes obvious the permanent biological control exerted by the outer cell layer of the mantle in both organic envelopes and mineralizing organic phases.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00249/36039/34574.pdf

DOI:10.3390/min4040815

http://archimer.ifremer.fr/doc/00249/36039/	
Formato: 	application/pdf	
Fonte: 	Minerals (2075-163X), 2014-12 , Vol. 4 , N. 4 , P. 815-834	
Fonte: 	2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

info:eu-repo/semantics/openAccess

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