Consulta: creatorFacets:"Chabrier, Sebastien"
Registros recuperados: 2
Data/hora: 02/06/2024 07:29:35

Yes, it turns: experimental evidence of pearl rotation during its formation
Provedor de dados: 5
Autores: Gueguen, Yannick; Czorlich, Yann; Mastail, Max; Le Tohic, Bruno; Defay, Didier; Lyonnard, Pierre; Marigliano, Damien; Gauthier, Jean-pierre; Bari, Hubert; Lo, Cedrik; Chabrier, Sebastien; Le Moullac, Gilles.
Cultured pearls are human creations formed by inserting a nucleus and a small piece of mantle tissue into a living shelled mollusc, usually a pearl oyster. Although many pearl observations intuitively suggest a possible rotation of the nucleated pearl inside the oyster, no experimental demonstration of such a movement has ever been done. This can be explained by the difficulty of observation of such a phenomenon in the tissues of a living animal. To investigate this question of pearl rotation, a magnetometer system was specifically engineered to register magnetic field variations with magnetic sensors from movements of a magnetic nucleus inserted in the pearl oyster. We demonstrated that a continuous movement of the nucleus inside the oyster starts after a...
Tipo: Text
Palavras-chave: Pearl oyster; Pearl rotation; Biomineralization.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00275/38598/37127.pdf

Influence of Temperature and Pearl Rotation on Biomineralization in the Pearl Oyster Pinctada margaritifera
Provedor de dados: 5
Autores: Le Moullac, Gilles; Schuck, Lucie; Chabrier, Sebastien; Belliard, Corinne; Lyonnard, Pierre; Broustal, Floriane; Soyez, Claude; Saulnier, Denis; Brahmi, Chloe; Ky, Chin-long; Beliaeff, Benoit.
The objective of this study was to observe the impact of temperature on pearl formation using  an integrative approach describing the rotation of the pearls, the rate of nacre deposition, the  thickness of the aragonite tablets and the biomineralizing potential of the pearl sac tissue  though the expression level of some key genes. Fifty pearl oysters were grafted with  magnetized nuclei to allow the rotation of the pearls to be described. Four months later, 32 of  these pearl oysters were exposed to four temperatures (22, 26, 30 and 34°C) for 2 weeks.  Results showed that the rotation speed differed according to the movement direction: pearls  with axial movement (AM) had a significantly higher rotation speed than those with random  movement (RM). Pearl...
Tipo: Text
Palavras-chave: Magnetometer; Rotation speed; Nacre growth; Nacre thickness; Gene expression; Pmarg-Pif177.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00450/56196/57753.pdf