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Search Results: 1 - 10 of 424 matches for " Madeleine Goutx "
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Fast Growth May Impair Regeneration Capacity in the Branching Coral Acropora muricata
Vianney Denis, Mireille M. M. Guillaume, Madeleine Goutx, Stéphane de Palmas, Julien Debreuil, Andrew C. Baker, Roxane K. Boonstra, J. Henrich Bruggemann
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0072618
Abstract: Regeneration of artificially induced lesions was monitored in nubbins of the branching coral Acropora muricata at two reef-flat sites representing contrasting environments at Réunion Island (21°07′S, 55°32′E). Growth of these injured nubbins was examined in parallel, and compared to controls. Biochemical compositions of the holobiont and the zooxanthellae density were determined at the onset of the experiment, and the photosynthetic efficiency (Fv/Fm) of zooxanthellae was monitored during the experiment. Acropora muricata rapidly regenerated small lesions, but regeneration rates significantly differed between sites. At the sheltered site characterized by high temperatures, temperature variations, and irradiance levels, regeneration took 192 days on average. At the exposed site, characterized by steadier temperatures and lower irradiation, nubbins demonstrated fast lesion repair (81 days), slower growth, lower zooxanthellae density, chlorophyll a concentration and lipid content than at the former site. A trade-off between growth and regeneration rates was evident here. High growth rates seem to impair regeneration capacity. We show that environmental conditions conducive to high zooxanthellae densities in corals are related to fast skeletal growth but also to reduced lesion regeneration rates. We hypothesize that a lowered regenerative capacity may be related to limited availability of energetic and cellular resources, consequences of coral holobionts operating at high levels of photosynthesis and associated growth.
Karyotypic polymorphism and evolution within and between the Liolaemus monticola (Iguanidae) "northern 2n = 38-40" chromosome race populations in central Chile
LAMBOROT,MADELEINE;
Revista chilena de historia natural , 2001, DOI: 10.4067/S0716-078X2001000000017
Abstract: chromosomal genotypes were scored from 359 liolaemus monticola lizards of the "northern, 2n = 38-40" chromosomal race from 21 locality samples between the maipo (and one of its tributaries) and the aconcagua (and one of its tributaries) ribers, plus a sample from the interracial hybridization zone, and some representative locality samples of the "southern 2n = 34" and the "multiple fission 2n = 42-44" chromosomal races for comparisons. the first seven variable chromosomal pairs were coded as mendelian genotypes and statistically summarized by several clustering and population genetic algorithms. spatial and temporal differentiation was assessed by chromosome frequencies, chromosomal diversity and heterozygosity. while no differentiation was found for diversity in the "northern 2n = 38-40" race, chromosomal frequencies and heterozygosity showed significant spatial differentiation that permit distinguishing between the coastal, andean and transversal mountain range populations. the sample of cuesta chacabuco may represent a hybrid zone between the other two range samples. the origin of the chromosomal rearrangements, the population cytogenetics, and the recombination patterns resulting from chromosomal heterozygosity are compared in these chromosomal races, thus expanding the geographical area. these patterns are discussed with respect to the evolution of this complex in chile and the importance of the riverine barriers in central chile
Participación y organización comunitaria en el sector salud: Servicios sociales quebequense
Madeleine,Richer;
Revista de Ciencias Sociales , 2005,
Abstract: this article analyzes citizen participation and community organizations in the health sector in the canadian province of québec. participation is a theme of great relevance in democracy, and also in the efficiency and efficacy of public services. in the quebec health system different participation models co-exist : consultative citizen participation, assemblies and public forums, and decision making participation through representation in administrative councils in regional organizations, health installations and social services. the integration of health services and social services within its administration is an original facet of the quebec system. another distinctive characteristic is the importance of the social movement known as the quebec community movement, which has achieved important recognition and innovation in the handling of social and health problems.
La précarité au Québec : un concept parmi d’autres pour parler des jeunes
Madeleine Gauthier
SociologieS , 2011,
Abstract: Ce texte met en contexte l’usage du concept de précarité au Québec. Celui-ci a surtout été utilisé parmi beaucoup d’autres pour décrire la situation des jeunes au moment de la crise de l’emploi des décennies 1970 et 1980. Il a parfois contribué, par son attribution à l’ensemble des jeunes, à laisser les plus vulnérables dans l’ombre et à amplifier l’effet du travail atypique sur l’avenir de toute une génération. Un usage plus modéré du concept s’est imposé progressivement en présence de faits plus justement vérifiés. Sa force de persuasion a pu susciter des stratégies tant individuelles que collectives en faveur des jeunes. Ce retour dans le temps a permis de montrer que les jeunes sont sensibles à la conjoncture mais n’en restent pas pour autant les victimes. Est-ce à cause du type d’état (de G sta Esping-Anderson, évoqué par Mircea Vultur) que le concept n’a eu qu’une importance relative au Québec ? La question se pose-t-elle dans une approche pragmatique du changement ? "Precariousness" in Québec: one of several concepts applied to young peopleThis paper examines the concept of "precariousness" in a Québec context. This concept was one of several used to describe the situation of young people during the employment crisis of the 1970s and 1980s. It was applied to young people as a whole and thus sometimes favoured a tendency to gloss over the highly vulnerable situations and to amplify the effect of non-standard employment on the future of an entire generation. More moderate use of the concept gradually prevailed with more accurate data. It was a persuasive concept that did bring about individual and collective strategies to help young people. This look backward in time shows that young people are sensitive to the economy and its performance. They are nonetheless not permanently victims of economic downturn. Is the type of welfare state (Esping-Anderson as argued by Vultur) the reason why the concept has had only relative importance in Québec? Should the question be raised as part of a pragmatic approach to change? La Precariedad en Québec: un concepto entre otros para hablar de la JuventudEste texto contextualiza la utilización del concepto de precariedad en Québec. El concepto se ha utilizado, entre otros muchos, para describir la situación de los jóvenes en el momento de la crisis del empleo de los a os 1970-1980. Por habérsele atribuido a la totalidad de los jóvenes, a veces contribuyó a dejar en la oscuridad a aquéllos más vulnerables y a amplificar los efectos del trabajo atípico sobre el futuro de una generación entera. Paulatinamente, se ha i
Karyotypic polymorphism and evolution within and between the Liolaemus monticola (Iguanidae) "northern 2n = 38-40" chromosome race populations in central Chile Polimorfismo cromosómico y evolución intra e inter poblacional de la raza cromosómica "Norte 2n = 28-40" de Liolaemus monticola (Iguanidae) en Chile Central
MADELEINE LAMBOROT
Revista chilena de historia natural , 2001,
Abstract: Chromosomal genotypes were scored from 359 Liolaemus monticola lizards of the "northern, 2n = 38-40" chromosomal race from 21 locality samples between the Maipo (and one of its tributaries) and the Aconcagua (and one of its tributaries) ribers, plus a sample from the interracial hybridization zone, and some representative locality samples of the "southern 2n = 34" and the "multiple fission 2n = 42-44" chromosomal races for comparisons. The first seven variable chromosomal pairs were coded as Mendelian genotypes and statistically summarized by several clustering and population genetic algorithms. Spatial and temporal differentiation was assessed by chromosome frequencies, chromosomal diversity and heterozygosity. While no differentiation was found for diversity in the "northern 2n = 38-40" race, chromosomal frequencies and heterozygosity showed significant spatial differentiation that permit distinguishing between the coastal, Andean and transversal mountain range populations. The sample of Cuesta Chacabuco may represent a hybrid zone between the other two range samples. The origin of the chromosomal rearrangements, the population cytogenetics, and the recombination patterns resulting from chromosomal heterozygosity are compared in these chromosomal races, thus expanding the geographical area. These patterns are discussed with respect to the evolution of this complex in Chile and the importance of the riverine barriers in central Chile Se cuantificaron los "genotipos" cromosómicos para 359 lagartijas de 21 muestras poblacionales de la raza "Norte, 2n = 38-40" comprendida entre los ríos: río Maipo y uno de sus afluentes el río Yeso y río Aconcagua (y uno de sus afluentes el río Juncal). Con fines comparativos agregamos una muestra de la zona de hibridación interracial, algunas muestras representativas de la raza "Sur 2n = 34" y una de la raza "múltiples fisiones 2n = 42-44". Los siete primeros pares cromosómicos variables fueron codificados como genotipos mendelianos y resumidos en varios algoritmos de agrupaciones y de genética de poblaciones. La diferenciación espacial y temporal fue pesquisada por las frecuencias cromosómicas, la diversidad cromosómica y la heterocigocidad. Si bien en la raza "Norte 2n = 38-40" no encontramos diferenciación para la diversidad cromosómica, las frecuencias y la heterocigosidad cromosómicas muestran una significativa diferenciación espacial, permite distinguir las poblaciones procedentes de la cordillera de La Costa, cordillera de Los Andes y cordón transversal. La muestra Cuesta de Chacabuco (Transversal) podría correspo
Interpretative Theories about Ultra Dilutions: Supporting Evidences
Madeleine Bastide
International Journal of High Dilution Research , 2006,
Abstract:
Di-μ-iodido-bis[(diethyl ether-κO)(η5-1,3-di-tert-butylcyclopentadienyl)ytterbium(II)]
Madeleine Schultz
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807066871
Abstract: The half-sandwich title compound, [Yb2(C13H21)2I2(C4H10O)2], crystallizes as a centrosymmetric dimer. The Yb atom is coordinated in a three-legged piano-stool geometry by a cyclopentadienyl ring, two I anions and the O atom of a diethyl ether molecule. The central Yb2I2 core is an approximate square.
Les paysages de la banquise
Madeleine Griselin
Mappemonde , 1990,
Abstract: La banquise polaire arctique, un univers formé exclusivement d'eau sous ses trois états, solide, liquide et gazeux, peut être considéré comme paysage puisqu'elle est un spectacle que l'on peut décrire. De la genèse de cette banquise et de son évolution par la dérive naissent des formes typiques dans ce milieu qui n'a rien de calotte ni de patinoire. Les paysages ainsi engendrés sont soumis à de constantes mutations liées à la permanence de mouvement et à l'action répétée et conjuguée des facteurs météorologiques, glaciologiques et océanographiques.
à propos de Chorèmes (Mappemonde 86/4). Carto-humeur, carto-humour
Madeleine BROCARD
Mappemonde , 1988,
Abstract:
Second Language Writing: Research Insights for the Classroom. Second Language Writing: Research Insights for the Classroom.
Madeleine Youmans
Ilha do Desterro , 2008,
Abstract: The study of composition at the post-secondary level is a relatively new practice which has become widespread only during the past half-century. More recent is the emergence over the past two to three decades of composition studies as an academic discipline, and even more recent is the awareness that composition research and pedagogy must expand to meet the needs of the ESL population. As growing numbers of international students flood colleges and universities in the English-speaking world, and as English becomes increasingly important as a world language, ESL composition is a burgeoning field. The study of composition at the post-secondary level is a relatively new practice which has become widespread only during the past half-century. More recent is the emergence over the past two to three decades of composition studies as an academic discipline, and even more recent is the awareness that composition research and pedagogy must expand to meet the needs of the ESL population. As growing numbers of international students flood colleges and universities in the English-speaking world, and as English becomes increasingly important as a world language, ESL composition is a burgeoning field.
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