Search results for "Bain"
showing 10 items of 422 documents
Dendrochronologie : potentialités et nouveaux enjeux pour l’archéologie préventive
2019
International audience; La dendrochronologie, méthode de datation qui étudie la variation des largeurs des cernes de croissance des arbres, est sollicitée, en archéologie, pour l’obtention d’une date absolue. Elle nécessite un dialogue incontournable entre les différents acteurs de la discipline pour fiabiliser les acquisitions, voire tout simplement obtenir une date. L’analyse des bois archéologiques ne se limite toutefois pas à la seule datation et constitue le point de départ de nouvelles approches qui permettent de combler des espaces et des champs de recherche encore lacunaire, pour le sud de la France notamment. Dans le contexte des changements climatiques actuels, la dendrochronologi…
Street art, récit et poésie
2019
International audience; Au croisement d’intérêts artistiques, sociologiques, juridiques, philosophiques et littéraires, le street art s’intègre de plus en plus au paysage universitaire. Ayant pour objet les relations entre le street art, la poésie et le récit, ce volume développe une nouvelle réflexion transdisciplinaire sur les pratiques urbaines, en proposant des approches littéraire, narrative, axiologique. Il s’interroge sur la portée poétique du street art, une forme d’expression mêlant bien souvent écriture et image, à la fois dessins sur les murs et jeux sur les mots, poésies graphiques et images poétiques.S’il est communément affirmé que l’art urbain apporte une note de poésie à l’e…
Les inégalités de mobilité dans les franges périphériques de Belo Horizonte (Brésil) : quelles évolutions ?
2019
International audience
Race et espace : la ville comme lieu d’étude des représentations raciales
2022
Cette étude examine les « paysages raciaux » dans le centre-ville de Bordeaux, c'est-à-dire la façon dont les discours sur la race et le racisme se matérialisent au quotidien. Les paysages raciaux rendent compte de la nature contradictoire des discours sur la race et le racisme en Europe, et en France, qui sont à la fois omniprésents et dissimulés. Analyser le centre-ville de Bordeaux permet d’appréhender la manière dont les discours locaux et nationaux s’étayent et se construisent, mettant ainsi en lumière les relations complexes entre les discours sur la race, le passé colonial et le cadre républicain universaliste spécifique à la France (Fila-Bakabadio 2011). Cette étude pose donc la que…
Délimitation d'ensembles morphologiques par une approche multi-échelle
2008
The paper deals with the identification of the envelope of built-up patterns that we define as the limit of a morphologically coherent set through the scales. The point of view is purely morphological; it refers to a multi-scale approach. Besides the description of the context of the research (that is the urban-rural delimitation) the paper is dedicated to the presentation of the methodological principles which allow the identification of the envelope of built-up patterns. The first step of the methodology, that is the step by step dilation of a studied built-up pattern, is briefly described. The emphasis is placed on the second step of the methodology that is the identification of a thresh…
Aménités urbaines et périurbaines dans une aire métropolitaine de forme fractale
2002
In the THÜNEN tradition, Urban Economy is a striking abstraction, giving models that keep the main features of the wide diversity of real word cities. Nevertheless, this paradigm less suits the modern urban spatial structures (polycentrism, weak centripetal forces, etc.), particularly the peri-urban form of metropolitan areas, which are an urban/rural integrated space. In this paper, we propose a classical micro-economic urban model combined with a " SIERPINSKI's carpet " geometry, a fractal form which suits for fit together urban and rural areas in a hierarchical structure. Subject to a budget constraint, a household maximises a Cobb-Douglas/CES function, where household's taste for divers…
Mechanisms of arachidonic acid induced glial swelling
2000
Accumulation of arachidonic acid (AA) in the brain during ischaemia may contribute to development of brain oedema. In this study we investigated the effect of selected drugs on AA-induced cytotoxic brain oedema in C6 glioma cells. Suspended C6 glioma cells were preincubated with drugs and AA (0.1 mM) was added. When no drug was administered cell volume increased immediately after the addition of AA with a maximum cell swelling of 13.1+/-1.9% at 15 min (mean +/- S.E. M.). Preincubation of cells with BW 755C, a dual inhibitor of cyclo- and lipoxygenases, showed no reduction in cell swelling from AA, whereas superoxide dismutase, amiloride and the protein kinase inhibitor H-9370 led to a signi…
Effect of inhibition of the electrogenic Na+/K+ pump on the mechanical activity in the rat uterus.
1996
The effects of ouabain and K(+)-free solution were studied in estrogen-primed rat uterine strips under resting tone or repeatedly stimulated with KCl, acetylcholine or oxytocin applied for 20 minutes at 60 minute intervals. These effects were compared with those of the K+ channel opener cromakalim. In preparations under resting tone, ouabain (0.1 mM and 0.3 mM) induced rhythmic contractions which disappeared after 20-30 minutes whereas at a higher concentration (1 mM) it evoked a rapid, phasic response followed by a small tonic contraction. Exposure of the strip to a K(+)-free solution induced either rhythmic waves, which ceased after 8-10 minutes, or a single phasic contraction which was f…
The effect of human proinsulin C-peptide on erythrocyte deformability in patients with Type I diabetes mellitus.
1999
Aims/hypothesis. In recent years, evidence has arisen that proinsulin C-peptide exerts biological effects especially on microcirculation, e. g. C-peptide has been shown to increase skin microcirculation in patients with Type I (insulin-dependent) diabetes mellitus and to activate endothelial nitric oxide synthase. This study aimed to investigate the influence of proinsulin C-peptide on erythrocyte deformability which was assessed by means of laser diffractoscopy. Methods. Blood samples from healthy control subjects (n = 10) and Type I diabetic patients (n = 15) completely deficient of C-peptide were analysed at shear stresses ranging from 0.3 to 30 Pa. Results. Erythrocyte deformability was…
The neuronal efflux of noradrenaline: Dependency on sodium and facilitation by ouabain
1974
Rabbit hearts were isolated after pretreatment with the MAO inhibitor pargyline and with reserpine and were perfused with 200 ng/ml noradrenaline for 1 h. During the subsequent wash-out with an amine-free solution for 2 h, the neuronal efflux of noradrenaline declined mono-exponentially with a mean halftime of 42 min. Both Na+-free solution and ouabain caused facilitation of the efflux which thereafter declined in a multi-exponential fashion. The maximum facilitation was reached after 3 min of Na+-free perfusion and 25 min after introduction of ouabain. The amount of exogenous noradrenaline accumulated in the heart was only partially released when the extracellular Na+-concentration was nor…