Yannicke Dauphin

Yannicke Dauphin
Muséum National d'Histoire Naturelle · ISYEB

PhD and Habilitation
editor in chief section Biomineralization and Biominerals : Minerals (MDPI)

About

392
Publications
47,673
Reads
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7,348
Citations
Citations since 2017
45 Research Items
2271 Citations
20172018201920202021202220230100200300
20172018201920202021202220230100200300
20172018201920202021202220230100200300
20172018201920202021202220230100200300
Additional affiliations
April 2015 - present
Muséum National d'Histoire Naturelle
Position
  • collaborator
January 1973 - February 2015
Sorbonne Université
Position
  • Professor

Publications

Publications (392)
Conference Paper
Full-text available
pathological biomineralisations: URINARY LITHIASE
Article
Biomineralization is the process by which living organisms produce minerals. Although the term is recent (∼1970), the study of internal and external skeleton mineralization is older. This article describes the history of biomineralization studies. This story is strongly dependent on, but not only on, the history of analytical technique development....
Article
Full-text available
In a series of Polynesian pearls collected after short cultivation periods, early post-grafting mineral deposits were characterized by high resolution synchrotron-based X-ray fluorescence with unprecedented accuracy. Morphological patterns and elemental composition are correlated through simultaneous imaging processes. Evidence that aragonite and c...
Article
Full-text available
The calcareous skeletons built by invertebrate organisms share a paradoxical property. Although growing outside the mineralizing cell layers the crystal-like skeleton units exhibit morphologies and three-dimensional arrangements that imply an efficient link between crystallization process and taxonomy. Almost two centuries of investigation led to a...
Article
Full-text available
The mineral composition of eggshells is assumed to be a conserved phylogenetic feature. Avian eggshells are composed of calcite, whereas those of taxa within Chelonia are aragonitic. Yet, the eggshells of a passerine bird were reported to be made of aragonite. Here, we report a new study of the same bird eggshells using a combination of in situ mic...
Article
Full-text available
Fish fossilisation is relatively poorly known, and skeletal element modifications resulting from predation, burial and diagenesis need to be better investigated. In this article, we aim to provide new results about surface, structural and chemical changes in modern and fossil fish bone. Fossil samples come from two distinct localities of roughly th...
Article
Resolving Internal Structures and Composition of Biominerals: The Case of Calcitic Prisms of Mollusk Shells - Yannicke Dauphin, Jean-Pierre Cuif, Alain Brunelle, Kadda Medjoubi, Murielle Salomé, Andrea Somogyi
Article
Full-text available
In the shells of the Pelecypods belonging to the Pinnidae family, the calcareous prismatic units of the outer layer are long-standing references for biomineralization studies. To elucidate how the mechanism of prism formation enables both shell elongation and thickness increase, a top-down structural analysis of these classical “simple prisms” has...
Article
Full-text available
Development and evolution of the shell in cephalopods is difficult to establish as there is few species with a calcified shell that could be fossilized (stable in geological time). Internal cuttlebone of sepiids is so particular that homologies are difficult to find. The developmental sequence in embryos give some response elements by comparison wi...
Experiment Findings
Full-text available
Article
The quality of natural and cultured pearls depends on the size, shape and properties of the surface. The inner structure of the pearl is not known, and not taken into account. Indeed, it is assumed that the cultured pearl is a nucleus covered by a thin organic layer, a thin prismatic layer and a thick nacreous layer. The examination of spherical an...
Article
Full-text available
Rodent accumulations are widely used for palaeoenvironmental reconstructions. But these accumulations are created through the activity of predators (carnivorous mammals, birds of prey), the predation and digestion of which modify the preservation of bones and teeth. The microstructures of dentine and enamel, as well as the mineralogy and compositio...
Article
Cultivated pearls frequently exhibit morphological irregularities making obvious that mineral deposition was irregularly distributed onto nucleus surface. Taking advantage of experimental cultivations with short durations (from 10 days to few months), these irregular deposits predating occurrence of the nacre were investigated in Polynesian pearls...
Article
Northwestern Africa is today characterized by high geographical, climatic and ecological diversity; it is recognized as a hotspot of biodiversity and a major area for both human and faunal evolution. Studies of North African fossil microvertebrates have increased considerably in recent years, but they no longer just provide palaeontological descrip...
Article
Avian eggshells are composed of several layers made of organic compounds and a mineral phase (calcite), and the general structure is basically the same in all species. A comparison of the structure, crystallography, and chemical composition shows that despite an overall similarity, each species has its own structure, crystallinity, and composition....
Article
Full-text available
A top-down approach to the mineralized structures and developmental steps that can be separated in the shells of Pinctada margaritifera was carried out. Detailed characterizations show that each of the two major layers usually taken into account (the outer prismatic layer and the inner nacreous layer) is actually the result of a complex process dur...
Article
Full-text available
The prismatic layer of Pinna (Mollusca) is one of the most studied models for the understanding of the biomineralization mechanisms, but our knowledge of the organic components of this layer is limited to the proteins of the soluble organic matrices. The interplay of the mineral and organic matrices is studied using scanning electron and atomic for...
Conference Paper
Full-text available
Tropical ocean­atmosphere interaction plays a key­role for worldwide climate variability. Instrumental observations are available only for the last decades and paleoclimatic reconstruction becomes necessary to recognize decadal and longer changes of the tropical system. Long­live massive corals, developped all around tropical belt, are unique archi...
Article
Full-text available
Mollusc shells are complex organomineral structures, the arrangement and composition depending on the species. Most studies are dedicated to shells composed of an aragonite nacreous and a calcite prismatic layer, so the nacreous prismatic model based on Pinctada and Atrina–Pinna. Here, we studied the micro- and nanostructure, the mineralogy and com...
Article
Among the various defects that contribute to depreciate the commercial value of pearls, the occurrence of depressed rings is the most spectacular. Through a series of structural, physical and chemical characterizations of the pearl layer, this paper reveals that the origin and initial stages of these essentially superficial defects are to be found...
Chapter
Comment les vestiges matériels du passé se sont-ils constitués et conservés au cours du temps, durant des centaines, des milliers, ou des millions d’années? C’est dans cette perspective que se placent les études en taphonomie, largement pluri- et inter-disciplinaires, intégrant de multiples approches scientifiques relevant des sciences de la Terre,...
Chapter
Comment les vestiges matériels du passé se sont-ils constitués et conservés au cours du temps, durant des centaines, des milliers, ou des millions d’années? C’est dans cette perspective que se placent les études en taphonomie, largement pluri- et inter-disciplinaires, intégrant de multiples approches scientifiques relevant des sciences de la Terre,...
Chapter
Comment les vestiges matériels du passé se sont-ils constitués et conservés au cours du temps, durant des centaines, des milliers, ou des millions d’années? C’est dans cette perspective que se placent les études en taphonomie, largement pluri- et inter-disciplinaires, intégrant de multiples approches scientifiques relevant des sciences de la Terre,...
Chapter
Comment les vestiges matériels du passé se sont-ils constitués et conservés au cours du temps, durant des centaines, des milliers, ou des millions d’années? C’est dans cette perspective que se placent les études en taphonomie, largement pluri- et inter-disciplinaires, intégrant de multiples approches scientifiques relevant des sciences de la Terre,...
Chapter
Comment les vestiges matériels du passé se sont-ils constitués et conservés au cours du temps, durant des centaines, des milliers, ou des millions d’années? C’est dans cette perspective que se placent les études en taphonomie, largement pluri- et inter-disciplinaires, intégrant de multiples approches scientifiques relevant des sciences de la Terre,...
Article
Fossil teeth are used for palaeoenvironmental reconstructions. Among the criteria used, the geochemical composition is favoured, because it is said that the enamel is exempt from diagenetic changes. The combined microstructural and chemical analyses of rodent incisors from the cave of El Hahroura 2 (Morocco, Middle Palaeolithic–Neolithic) using sca...
Conference Paper
Full-text available
This Book contains the entire divulgation work wich is presented at TCS 2017 Barcelona Meeting. The abstracts are divided in Oral Sessions, Mini Symposia Sessions and Poster Presentations. We encourage you to take a glance to the book in favor of finding new ways of networking.
Article
Full-text available
The crayfish Cherax quadricarinatus stores calcium ions, easily mobilizable after molting, for calcifying parts of the new exoskeleton. They are chiefly stored as amorphous calcium carbonate (ACC) during each premolt in a pair of gastroliths synthesized in the stomach wall. How calcium carbonate is stabilized in the amorphous state in such a biocom...
Chapter
Three main categories are involved in biominerals: silica, calcium carbonates, and calcium phosphates. The calcium biominerals are usually crystalline, but amorphous types are also known. Within these categories, the shapes and chemical contents of structural units are variable. Moreover, the chemical and physical properties of biominerals are very...
Article
The structure and composition of the eggshells of two commercial species (guinea fowl and greylag goose) have been studied. Thin sections and scanning electron microcopy show the similarity of the overall structure, but the relative thickness of the layers differs in these two taxa. Atomic force microscopy shows that the different layers are compos...
Article
Full-text available
Ocean acidification is predicted to impact ecosystems reliant on calcifying organisms, potentially reducing the socioeconomic benefits these habitats provide. Here we investigate the acclimation potential of stony corals living along a pH gradient caused by a Mediterranean CO2 vent that serves as a natural long-term experimental setting. We show th...
Article
We report on a structural analysis of several basal spicules of the deep-sea silica sponge Monorhaphis chuni by electron microscope techniques supported by a precise focused ion beam (FIB) target preparation. To get a deeper understanding of the spicules length growth, we concentrated our investigation onto the apical segments of two selected spicu...
Article
Scleractinian corals are a major source of biogenic calcium carbonate, yet the relationship between their skeletal microstructure and mechanical properties has been scarcely studied. In this work, the skeletons of two coral species: solitary Balanophyllia europaea and colonial Stylophora pistillata, were investigated by nanoindentation. The hardnes...
Article
Full-text available
Bones and teeth in archaeological sites provide data on the past biodiversity, the age of the site and palaeoenvironment. Nevertheless, these remains are not intact. Predation produces damages, and these modifications preclude the mechanical and climatic alterations. Finally, buried samples are modified depending on the geological environment. Thus...
Article
Full-text available
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 c...
Article
Full-text available
Significant progress has been made in understanding the interaction between mineral precursors and organic components leading to material formation and structuring in biomineralizing systems. The mesostructure of biological materials, such as the outer calcitic shell of molluscs, is characterized by many parameters and the question arises as to wha...
Article
The precipitation of calcium carbonate was carried out in the presence of the intraskeletal organic matrix (OM) extracted from Mediterranean corals. They were diverse in growth form and trophic strategy, Balanophyllia europaea and Leptopsammia pruvoti-solitary corals, only the first zooxanthellate coral-and Cladocora caespitosa and Astroides calycu...
Article
Nearly equal volume fractions of biosilica and proteins are found in the micron-thick axial filament of the anchor spicule of the marine sponge Monorhaphis chuni. Chemical composition and mechanical properties of this unique composite material are characterized by confocal Raman spectroscopy and by nanoindentation and nanoscale elastic modulus mapp...
Article
The two layers of the shell of a living fossil, Neotrigonia, were examined using optical, electron and atomic-force microscopies. Nacre and prisms are composed of complex acicular crystallites. These crystallites are heterogeneous and composed of rounded granules surrounded by a thin cortex. Despite both layers being aragonite, the chemical composi...
Article
Full-text available
Mineralization in pearls is used as a 'study model' to understand basic mechanisms of calcium carbonate biomineralization. In addition to nacre formation, vaterite and calcite can be found in pearls, with the occurrence of calcite being the least studied. In this study, two calcite microstructures, prisms and “pseudo-prisms”, are described. Electro...
Article
Thin sections, scanning electron microscopy (SEM), diffraction X (DRX) and infrared spectrometry (FTIR) have been used to study the structure, mineralogy, crystallinity and bulk composition of fossil rodent long bones extracted from a succession of sedimentary layers in a cave from Morocco (Neolithic - Middle Palaeolithic, El Harhoura 2). The micro...
Article
The discovery of a perfectly ordered 3D mesoporous protein/silica structure in the axial filament of the marine sponge Monorhaphis chuni is reported by I. Zlotnikov and co-workers on page 1682. The structure belongs to a body-centered tetragonal symmetry system and comprises interconnecting lattices of protein (red) and silica (green), templated by...
Article
Full-text available
Nanostructured CaCO3 crystals are produced in vitro by adding the acid-soluble organic matrix (SOM) extracted from the nacreous layer of Pinctada margaritifera pearl oyster shell to a supersaturated solution of calcium carbonate. For SOM concentrations above 25 ppm, the produced calcite crystals show two structural features of nacre and, more gener...
Article
Full-text available
Species of Haliotis (abalone) show high variety in structure and mineralogy of the shell. One of the European species (Haliotis tuberculata) in particular has an unusual shell structure in which calcite and aragonite coexist at a microscale with small patches of aragonite embedded in larger calcitic zones. A detailed examination of the boundary bet...
Article
Organic compounds have been extracted from calcium carbonate skeletons produced by three invertebrate species belonging to distinct phyla. The soluble parts of these skeleton matrices were isolated and analysed by synchrotron-based X-ray spectroscopy (XPS). The presence of calcium associated with these organic materials was revealed in every sample...
Article
Scleractinian coral skeletons are composed mainly of aragonite in which a small percentage of organic matrix (OM) molecules is entrapped. It is well known that in corals the mineral deposition occurs in a biological confined nucleation site, but it is still unclear to what extent the calcification is controlled by OM molecules. Hence, the shape, si...
Article
Biogenic ceramics are known to exhibit superior toughness due to a laminated architecture with ultrathin organic layers separating the ceramic blocks. Theoretical analyses relate the toughness increase to the modulus contrast, Ec/Eo between the stiff, Ec, and the compliant, Eo, components. However, experimental data on this contrast are extremely d...
Article
Full-text available
Mollusk shells, especially the nacre, are of commercial interest as well as palaeoenvironmental proxies. They are also investigated as biomaterials for medical purposes and biomimetics. Although the mineralogy is well-known and unique (aragonite tablets), the organic components are various. However, determination of the precise composition of the s...
Article
Full-text available
Nerita undata is a marine gastropod, the shell of which consists of an external layer composed of very fine, long and undulating calcite prisms, and of an internal aragonite crossed-lamellar layer. As for any Ca-carbonate shell, both layers are composite materials, resulting from the sub-micrometric association of organic macromolecules with the mi...
Article
Full-text available
Y.D.); julius.nouet@u-psud.fr (J.N.) Abstract: In several recent models of invertebrate skeletogenesis, Ca-carbonate crystallization occurs within a liquid-filled chamber. No explanation is given neither for the simultaneous occurrence of distinct polymorphs of Ca-carbonate within these liquid volumes, nor for the spatial arrangement of the mineral...