Consulta: creatorFacets:"Bardeau, Jean-francois"
Registros recuperados: 2
Data/hora: 01/06/2024 06:05:57

Preparation techniques alter the mineral and organic fractions of fish otoliths: insights using Raman micro-spectrometry
Provedor de dados: 5
Autores: Jolivet, Aurelie; Fablet, Ronan; Bardeau, Jean-francois; De Pontual, Helene.
The high spatial resolution analysis of the mineral and organic composition of otoliths using Raman micro-spectrometry involves rigorous protocols for sample preparation previously established for microchemistry and trace elements analyses. These protocols often include otolith embedding in chemically neutral resin (i.e., resins which do not contain, in detectable concentration, elements usually sought in the otoliths). Such embedding may however induce organic contamination. In this paper, Raman micro-spectrometry reveals the presence of organic contamination onto the surface obtained from the use of epoxy resin, specifically Araldite. This contamination level varies depending on otolith structures. Core and checks, known as structural discontinuities,...
Tipo: Text
Palavras-chave: Epoxy resin; Otolith composition; Microstructure; Raman spectrometry.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00138/24965/26372.pdf

Mineral phase in shell repair of Manila clam Venerupis philippinarum affected by brown ring disease
Provedor de dados: 5
Autores: Trinkler, Nolwenn; Bardeau, Jean-francois; Marin, Frederic; Labonne, Maylis; Jolivet, Aurelie; Crassous, Philippe; Paillard, Christine.
The mineral phase of shell repair in the Manila clam Venerupis philippinarum affected by brown ring disease (BRD) was characterised at various scales and at various stages of shell repair by confocal Raman microspectrometry and scanning electron microscopy. Spherulitic and quadrangular aragonite microstructures associated with polyene pigments were clearly observed. Von Kossa staining showed that at the beginning of shell repair, hemocytes are filled with insoluble calcium carbonate salts in all fluids and then are transported toward the extrapallial fluids and the repair sites. Our analyses suggest that after a Vibrio tapetis attack and BRD deposit some clams rapidly cover the deposit, resulting in a modification in the microstructure, which could be...
Tipo: Text
Palavras-chave: Aragonite; Hemocytes; Shell microstructure; Calcium carbonate; Biomineralization; Mollusc; Raman microspectrometry; Scanning electron microscopy.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00029/14065/11301.pdf