Morphological echocardiographic measurements: reference values as a function of body size in equids

Poster (2008)

Morphological image sketch coding

in Workshop on Circuits, Systems and Signal Processing, Proceedings (1993, March)

Morphological particularities of the head in four Carapidae (Ophidiiformes)

in Séret, Bernard; Sire, Jean-Yves (Eds.) 5th Indo-Pacific Fish Conference, Noumea - New Caledonia, 3-8 November 1997: Proceedings (1999)

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraborensis, Encheliophis homei, Encheliophis gracilis and Carapus acus) has ... [more ▼]

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraborensis, Encheliophis homei, Encheliophis gracilis and Carapus acus) has undertaken to compare it with the diet related characters. The cephalic organization of E. boraborensis and E. gracilis seems related to diet (mainly fishes and shrimps for the first one and holothurian tissues for the other) : these fishes are respectively commensal and parasitic. Although the feeding characters of E. homei and C. acus are closely similar to those of E. boraborensis, there are sparse observations of holothurian tissues in their stomach contents. It is suggested that these fishes are commensal when they are adults and have parasitic tendency when they are juvenile. [less ▲]

Morphological processing in developing readers: a visual word recognition study in French

Conference (2008, August)

Morphological properties of isolated galaxies vs. isolation criteria

in Astronomische Nachrichten (2009), 330

We studied the morphological properties of isolated galaxies samples in dependence on the isolation parameter and properties of primary catalogs. With this aim we identified the samples of single and ... [more ▼]

We studied the morphological properties of isolated galaxies samples in dependence on the isolation parameter and properties of primary catalogs. With this aim we identified the samples of single and isolated galaxies from SDSS DR5 (Single and QIsol) with the 3D Voronoi tessellation method (Elyiv et al. 2009). We found that in comparison with other samples of isolated galaxies, the QIsol sample contains an excess of late-type galaxies, especially with a low luminosity and BCG/Im/Irr morphology. We also showed that the fractions of early type galaxies in QIsol SDSS DR5 sample and samples 2MIG (Karachentseva et al. 2010) and CIG (Karachentseva et al. 1973; Hernandez-Toledo et al. 2008) are in a good agreement (16-19 %), but Allam's (Allam et al. 2005) and Prada's (Prada et al. 2003) SDSS DR1 samples show a higher excess of the early type galaxies that can be explained by the selection criteria and morphology definition method. We found a weak relation between isolation parameter and color index for the Single sample that may indicate that even in the low dense environment the morphology density relation is observed. We conclude that morphological properties of the resulting sample of isolated galaxies are highly dependent on the primary catalogue from which the galaxies were selected. Moreover, the selection criterion is also important but plays a secondary role in the resulting morphological content, color indices distribution and other parameters of the isolated galaxy samples. Only four galaxies are common in the 2MIG, QIsol, and CIG samples, namely UGC5184, UGC6121, UGC8495, and UGC9598, that allows to consider them as really most isolated galaxies. [less ▲]

Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

in Journal of Crystal Growth (2003), 249(1-2), 321-330

Among other applications, magnesium hydroxide is commonly used as a flame-retardant filler in composite materials, as well as a precursor for magnesium oxide refractory ceramic. The microstructure of the ... [more ▼]

Among other applications, magnesium hydroxide is commonly used as a flame-retardant filler in composite materials, as well as a precursor for magnesium oxide refractory ceramic. The microstructure of the powder is of prime importance in both technical applications. The influence of synthesis parameters on the morphological characteristics of magnesium hydroxide nanoparticles precipitated in dilute aqueous medium was studied. Several parameters were envisaged such as chemical nature of the base precipitant, type of counter-ion, temperature and hydrothermal treatment. Special attention was given to the obtaining of platelet-shaped, nanometric and de-agglomerated powders. The powders were characterized in terms of particle size distribution, crystal habits, morphology and ability to be redispersed in water. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption and laser diffusion analyses were used for this purpose. (C) 2002 Elsevier Science B.V. All rights reserved. [less ▲]

Morphological variability of some Devonian miospores

in Palaeozoic palynology in space and time. CIMP general meting (2006)

The morphological variation of fossil remains and the problematic notion of palaeontological species: the case of the Atlas bear resolved by ancient DNA analyses

Poster (2006, June)

Because of the morphological variation of the fossil remains, fossil species is a very difficult notion to define in palaeontology. This definition is effectively confronted to numerous problems such as ... [more ▼]

Because of the morphological variation of the fossil remains, fossil species is a very difficult notion to define in palaeontology. This definition is effectively confronted to numerous problems such as body size polymorphism inside a natural population, co-existence of lineages with different morphotypes in a same species. Interestingly, paleogenetics can clarify such ambiguous situations. Size polymorphism and sexual dimorphism were particularly highly pronounced in Ursid populations. Taking as an illustration the extinct populations of brown bear in North Africa, we succeed in addressing the mitochondrial genetic diversity of these Atlas bears and the sexual dimorphism of these samples using molecular typing We are confident that these results will give useful information to palaeontologists in order to revisit the Atlas bears taxonomy and that this approach should be extended to other complex cases of palaeontological species. [less ▲]

Morphological, chromosomal, and genic differences between sympatric Rattus rattus and Rattus satarae in South India

in Journal of Mammalogy (2011), 92(3), 659670

Two morphological forms of black rats (Rattus cf. rattus) were found living in sympatry in high-altitude dense forests of the Nilgiri Mountains, South India. The 1st one, often brown- or gray-bellied ... [more ▼]

Two morphological forms of black rats (Rattus cf. rattus) were found living in sympatry in high-altitude dense forests of the Nilgiri Mountains, South India. The 1st one, often brown- or gray-bellied, also is found commensal in lowland settlements and represents Rattus rattus cf. rufescens (Gray 1837), with a diploid number (2N) of 38 chromosomes. The 2nd form, which has most often a pure white belly, has 2N 5 42 chromosomes and is referable to Rattus r. satarae Hinton, 1918, based on morphological comparison with the holotype. A multidisciplinary study indicates that these 2 forms are characterized by clear-cut differences in biochemistry (electrophoresis of homologous isozymes), molecular sequences (mitochondrial and nuclear DNA), and chromosomes (detailed banding analysis). All these data, coupled to diagnostic morphological characteristics, support the hypothesis that Rattus satarae and Rattus rattus are separate, sympatric species, with no gene flow between them. Their similar external morphology is interpreted as the result of convergence through occupying the same ecological niche. [less ▲]

Morphologie de la mineuse des fruits du safoutier

Poster (2010, July)

L’étude de l’entomofaune des associations culturales prenant en compte le safoutier a permis de mettre en évidence des fortes abondances et une diversité des familles entomologiques. Au niveau des ... [more ▼]

L’étude de l’entomofaune des associations culturales prenant en compte le safoutier a permis de mettre en évidence des fortes abondances et une diversité des familles entomologiques. Au niveau des ravageurs majeurs, nous avons caractérisé un lépidoptère (tortricidae) dont les larves minent les noyaux des fruits du safoutier (Dacryodes edulis) et peuvent induire une chute prématurée d’au moins 25% de fruits. Toutes petites, les larves sont blanches et tachetées de points noirs, puis dans leur dernier stade, elles sont roses avec la tête, les plaque anale et prothoracique brunes. La chrysalide se forme dans un cocon de soie blanc. Elle est brune au départ et noir en fin de nymphose, et se caractérise par un crémaster noir proéminent au milieu de deux paires de soie recourbées à leurs extrémités. La nymphose dure au moins 20 jours. L’adulte est un paillon gris terne. Outre le safoutier, ce lépidoptère a été trouvé dans les fruits de Pseudopdondias longifolia. Des investigations ultérieures révéleront certainement d’autres plantes hôtes et permettront d’envisager une lutte biologique efficiente contre cette mineuse des fruits. [less ▲]