Search results for "morphologie"
showing 10 items of 70 documents
Stimuli-responsive hybrid materials: breathing in magnetic layered double hydroxides induced by a thermoresponsive molecule
2014
[EN] A hybrid magnetic multilayer material of micrometric size, with highly crystalline hexagonal crystals consisting of CoAl-LDH ferromagnetic layers intercalated with thermoresponsive 4-(4-anilinophenylazo)benzenesulfonate (AO5) molecules diluted (ratio 9 : 1) with a flexible sodium dodecylsulphate (SDS) surfactant has been obtained. The resulting material exhibits thermochromism attributable to the isomerization between the azo (prevalent at room temperature) and the hydrazone (favoured at higher temperatures) tautomers, leading to a thermomechanical response. In fact, these crystals exhibited thermally induced motion triggering remarkable changes in the crystal morphology and volume. In…
Characterization of the biofilm mode of life in the spoilage yeast Brettanomyces bruxellensis
2022
The management of contamination by the spoilage yeast Brettanomyces bruxellensis is a real challenge for the wine industry. The biofilm mode of life, known to increase the resistance of micro-organisms and to allow their persistence in the environment, is a strategy that can be adopted by B. bruxellensis.In this thesis project, microscopic observations revealed the presence of matrix around the cells, an essential element in the definition of a biofilm. The study also revealed that different morphotypes are involved in the structure of the biofilm, in particular filaments forming a network. Chlamydospore-like elements, never described before in B. bruxellensis, were observed within the biof…
L’audition chez les primates : entre forme, fonction, écologie et comportement
2019
The order Primates is composed of species whose morphologies, life history traits and behaviors are very diversified. The oldest representatives are dated about 65 million years. Because of this diversity, studies have focused on understanding the relationships between different parameters. Among the morphological structures studied, the basicranium, in particular the characters of the ear, have very often been considered in a phylogenetic perspective. Since the development of new acquisition techniques such as micro-tomography (μCT), new data are available. Thus, the interest for the morphology of the inner and middle ear, hitherto difficult to access, is growing. The structures of the ear…
Impact of thrombectomy on distales embolization during ST elevation myocardial infaction
2017
Percutaneous primary coronary angioplasty is the cornerstone for acute coronary syndrome with ST segment elevation (STEMI) treatment with proven efficacy to restore flow in culprit coronary artery. A TIMI (thrombolysis in myocardial infarction) 3 flow is generally restored in more than 90 % of patients. However, distal embolization of an angiographically visible thrombus (EDAV) has been identified as one of the major complications of primary angioplasty in STEMI because it limits the effectiveness of myocardial reperfusion and leads to a worse prognosis.Our objective was to determine the frequency of EDAVs during primary angioplasty for STEMI and to identify the determining factors.We evalu…
Archéologie du cheval
2002
Ouvrage de vulgarisation; Les restes d'équidés découverts sur les sites archéologiques constituent la source documentaire la plus cohérente que l'on puisse imaginer pour écrire l'histoire du cheval et de ses rapports avec l'homme, sur une période qui couvre sept millénaires, du Mésolithique aux temps modernes.Cette présentation repose essentiellement sur les découvertes archéologiques réalisées en France, mais certaines approches synthétiques prennent en compte un domaine plus large, celui de l'Europe. De même, si l'accent est mis sur l'apport des ossements découverts en fouille, d'autres sources, iconographiques ou textuelles notamment, sont sollicitées ici et là. Nous n'avons pas les moye…
On the synonymization of Acaulon longifolium Herrnst. & Heyn with Acaulon fontiquerianum Casas & Sérgio (Pottiaceae)
2021
During bryological work conducted in the Sharon plane region (Israel), a colony of Acaulon Müll. Hal. was discovered. The plants showed morphological affinities both to A. longifolium Herrnst. & Heyn and A. fontiquerianum Casas & Sérgio depending on the floras used for their identification which challenged their recognition as separate species. In order to solve this taxonomic dilemma, we conducted a detailed morphological characterization of the two species based on representative samples. The micromorphological study of vegetative, sporophytic and spore traits revealed the large overlap of range values between both species. Both species showed the characteristic combination of morphologic…
Évolution du paysage des franges urbaines à travers le temps
2019
National audience; Les paysages sont devenus un enjeu pour les territoires qui veulent offrir un cadre de vie agréable aux populations. C’est un facteur clé dans le choix des ménages pour installer leur logement, au même titre par exemple que l’accès aux commerces et services (Cavailhès et al., 2007). Ce phénomène peut s’observer plus spécifiquement dans les franges urbaines, zones où des surfaces bâties s’implantent au dépens des espaces agricoles ou boisés. Cette urbanisation progressive engendre une dynamique des paysages bien particulière, avec de fortes modifications dans des délais qui peuvent être très courts (Barnes et al., 2001). La qualité visuelle du paysage est alors modifiée à …
LES VARIATIONS DU NIVEAU MARIN SUR LE BASSIN DE PARIS AU BATHONIEN-CALLOVIEN. IMPACTS SUR LES COMMUNAUTÉS BENTHIQUES ET SUR L'ÉVOLUTION DES ORNITHELL…
1992
The study deals with the biological impacts of sea-Ievel changes on evolution of a Jurassic benthic fossil group (Ornithellida, Brachiopoda). The different time and scale at which the shifts in marine environments occur leads to the recognition of three interacting dynamic systems: environmental, communities, populations dynamics. The analysis is thus divided into a three steps hierarchy: sequence stratigraphy, analysis of the diversity of brachiopod assemblages, and analysis of morphological variations within omithellid populations. Sequence stratigraphy of the Dogger marly and carbonate successions in the Paris basin provides accurate correlations of depositional environments from shallow…
Über die gegenseitigen topographischen Beziehungen von Sacrum, Acetabulum und Splanchnocoel bei Vögeln [Putnu sakruma, acetabuluma un splanchnocēla s…
1936
Teksts vācu valodā, kopsavilkums latviešu valodā.
Zur Morphologie des embryonalen Meckelschen Knorpels der Vögel [Putnu embrionālā Meckela skrimšļa morfoloģija]
1933
Teksts vācu valodā, kopsavilkums latviešu valodā.