205 research outputs found

    Le nƓud et la terre

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    A partir du double constat d’une carence de statut et d’une crise de sens de la topologie lacanienne du nƓud borromĂ©en, nous tenterons d’expliciter le sens phĂ©nomĂ©nologique de ce nƓud. RĂ©duit Ă  son essence, le nƓud borromĂ©en est composĂ© de points et de trous. Or ces trous sont le rĂ©sultat de mouvements expĂ©rimentables sur un mode affectif et charnel. La pul- sion, le dĂ©sir, l’amour, constituent en effet la matiĂšre phĂ©nomĂ©nale du nƓud borromĂ©en. Avec Husserl, Merleau-Ponty et Patočka, nous montrerons que la Terre originaire et immobile cons- titue l’ancrage de tous ces mouvements. Les mouvements-nƓuds de la vie affective reçoivent alors une signification ontologique. Ils sont autant de variantes du mouvement primordial vers l’ĂȘtre

    Anti-MDA5 positive dermatomyositis complicated with rapidly progressive interstitial lung disease : a case report

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    Case presentation: We present a case of a 55-year-old Caucasian male with manifestations of dermatomyositis complicated with rapidly progressive interstitial lung disease (RP-ILD). Diagnosis of anti-MDA5 positive dermatomyositis was made. Discussion: Myositis specific antibodies (MSA) can be used for diagnosis and predicting prognosis in patients with polymyositis and dermatomyositis. Anti-MDA5 positive dermatomyositis should be considered in patients presenting with dermatomyositis and a disease course resembling antisynthetase syndrome in the absence of antisynthetase autoantibodies, especially if a remarkably high ferritin is noted. Anti-MDA5 autoantibodies have been associated with RP-ILD and adverse outcome. In patients with anti-MDA5 autoantibodies, early diagnosis and aggressive immunosuppressive treatment may improve prognosis. Conclusion: This case highlights the importance of determining MSA in patients with dermatomyositis and associated interstitial lung disease, as this has implications for diagnosis, prognosis and therapy

    Etude Floristique Et Structurale D’une ForĂȘt Mixte À l’Ile M’bamou, RĂ©publique Du Congo

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     La forĂȘt joue un rĂŽle important dans le maintien de l’équilibre global ainsi qu’à la protection de la biodiversitĂ©. RĂ©alisĂ©e dans la forĂȘt mixte de l’Ile M’bamou, cette Ă©tude vise Ă  contribuer Ă  une meilleure connaissance de la flore insulaire de ladite Ile. Quatre parcelles de 50 m de cĂŽtĂ© chacune soit 2500 mÂČ (0,25 ha) sur une superficie totale de 10000 mÂČ (1 ha) ont Ă©tĂ© installĂ©es. Au total, 223 individus de DHP≄ 10 cm ont Ă©tĂ© dĂ©nombrĂ©s avec 39 espĂšces, 37 genres et 21 familles. Les Ebenaceae (48,88 %) reste la famille dominante. Qualitativement, les Moraceae et Rubiaceae (12,82 %) sont les familles plus abondantes. L’Indice de Valeur d’Importance indique que Diospyros alboflavescens et Cleistopholis glauca sont les espĂšces les plus importantes. L’indice de Shannon varie de 1,41 Ă  2,38 et d’EquitabilitĂ© de 0,36 Ă  0,64. La densitĂ© Ă  l’hectare varie de 164 Ă  312 arbres et les valeurs de la surface terriĂšre varient de 13,92 Ă  17,69 mÂČ/ha. La structure diamĂ©trique prĂ©sente une forme exponentielle dĂ©croissante. Cette Ă©tude montre que la forĂȘt de l’Ile M’bamou prĂ©sente une dĂ©gradation trĂšs accentuĂ©e. The forest plays an important role in the maintenance of the global balance and in the protection of biodiversity. Carried out in the mixed forest of M'bamou Island, this study aims to contribute to a better knowledge of the island flora of the said Island. Four plots of 50 m each side, that is 2500 mÂČ (0.25 ha) on a total area of 10000 mÂČ (1 ha) were installed. In total, 223 individuals of DHP≄ 10 cm were counted with 39 species, 37 genera and 21 families. Ebenaceae (48.88%) remains the dominant family. Qualitatively, Moraceae and Rubiaceae (12.82%) are the more abundant families. The Importance Value Index indicates that Diospyros alboflavescens and Cleistopholis glauca are the most important species. The Shannon Index ranges from 1.41 to 2.38 and the Equitability Index from 0.36 to 0.64. The density per hectare varies from 164 to 312 trees and the basal area values vary from 13.92 to 17.69 mÂČ/ha. The diameter structure shows a decreasing exponential shape. This study shows that the forest of Ile M'bamou presents a very accentuated degradation

    Enhancing Bioproducts in Seaweeds via Sustainable Aquaculture: Antioxidant and Sun-Protection Compounds

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    Marine macroalgae are considered an untapped source of healthy natural metabolites and their market demand is rapidly increasing. Intertidal macroalgae present chemical defense mechanisms that enable them to thrive under changing environmental conditions. These intracellular chemicals include compounds that can be used for human benefit. The aim of this study was to test cultivation protocols that direct seaweed metabolic responses to enhance the production of target antioxidant and photoprotective biomaterials. We present an original integrated multi-trophic aquaculture (IMTA) design, based on a two-phase cultivation plan, in which three seaweed species were initially fed by fish effluents, and subsequently exposed to various abiotic stresses, namely, high irradiance, nutrient starvation, and high salinity. The combined effect of the IMTA’s high nutrient concentrations and/or followed by the abiotic stressors enhanced the seaweeds’ content of mycosporine-like amino acids (MAAs) by 2.3-fold, phenolic compounds by 1.4-fold, and their antioxidant capacity by 1.8-fold. The Sun Protection Factor (SPF) rose by 2.7-fold, and the chlorophyll and phycobiliprotein synthesis was stimulated dramatically by an order of magnitude. Our integrated cultivation system design offers a sustainable approach, with the potential to be adopted by emerging industries for food and health applicationsPartial funding for open access charge: Universidad de Málag

    Diversité et cartographie des ligneux le long des grandes artÚres de la ville de Brazzaville : cas des arrondissements 1 Makélékélé, 2 Bacongo et 4 Moungali, République du Congo

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    A l’échelon mondial, toutes les forĂȘts jouent un rĂŽle crucial dans la rĂ©gulation du climat du fait qu’elles sont l’un des principaux rĂ©servoirs de carbone de la terre, leur survie Ă©vite donc l’aggravation de l’effet de serre. RĂ©alisĂ©e dans la ville de Brazzaville, notamment dans trois : Moungali, Bacongo et MakĂ©lĂ©kĂ©lĂ© dont l’objectif gĂ©nĂ©ral Ă©tait d’amĂ©liorer les connaissances des ligneux se trouvant le long des grandes artĂšres. L’étude a portĂ©e sur la mesure le gĂ©orĂ©fĂ©rencement de tous les arbres de diamĂštre supĂ©rieur ou Ă©gal Ă  5 cm Ă  1,30 m du sol se trouvant le long des grandes artĂšres des arrondissements. Au total, 824 arbres dont 39 espĂšces, 31 genres et 20 familles. Arrondissement Moungali a prĂ©sentĂ© plus d’arbres (478) que les deux autres. La famille des Fabaceae est la plus reprĂ©sentĂ©e qualitativement dans tous les arrondissements (Bacongo, MakĂ©lĂ©kĂ©lĂ© et Moungali) avec respectivement 71,26 %, 35,20 et 44,14 %. Les sept (7) espĂšces les mieux reprĂ©sentĂ©es avec une frĂ©quence relative de 100 % sont : Bauhinia purpurea, Cananga odorata, Delonix regia, Eucalyptus Sp. Mangifera indica, Millettia laurentii et Terminalia mantaly. Les moyennes sur les indices de diversitĂ©s ont Ă©tĂ© d’ordre 3,40±0,22 pour Shannon et 0,77±0,004 pour l’EquitabilitĂ© de PiĂ©lou. L’analyse du Coefficient de Sorensen a montrĂ© une affinitĂ© floristique entre les trois arrondissements (51,37±3,76 %). La structure diamĂ©trique a prĂ©sentĂ© une allure exponentielle dĂ©croissante. Le diamĂštre moyen le plus Ă©levĂ© a Ă©tĂ© obtenu Ă  Moungali avec 1207,85±921,64 cm. Cette Ă©tude a permis de comprendre que les grandes artĂšres de Brazzaville prĂ©sentent une bonne diversitĂ© floristique dont la gestion rationnelle s’avĂšre nĂ©cessaire. Aussi, ces rĂ©sultats pourront servir de donnĂ©es de rĂ©fĂ©rences dans le programme d’amĂ©nagement de la ville. On a global scale, all forests play a crucial role in climate regulation, as they are one of the earth's main carbon reservoirs, and their survival therefore prevents the greenhouse effect from worsening. Carried out in the city of Brazzaville, particularly in three areas: Moungali, Bacongo, and MakĂ©lĂ©kĂ©lĂ©, the general aim was to improve knowledge of the woody plants found along the main arteries. The study involved measuring and geo-referencing all trees with a diameter of 5 cm or more at 1.30 m above ground level located along the main arteries of the districts. In all, 824 trees were surveyed, including 39 species, 31 genera, and 20 families. Arrondissement Moungali had more trees (478) than the other two. The Fabaceae family is the most represented qualitatively in all boroughs (Bacongo, MakĂ©lĂ©kĂ©lĂ©, and Moungali), with 71.26%, 35.20 and 44.14% respectively. The seven (7) best-represented species with a relative frequency of 100% are Bauhinia purpurea, Cananga odorata, Delonix regia, Eucalyptus Sp. Mangifera indica, Millettia laurentii and Terminalia mantaly. The averages for the diversity indices were 3.40±0.22 for Shannon and 0.77±0.004 for PiĂ©lou Equitability. Analysis of Sorensen's Coefficient showed a floristic affinity between the three districts (51.37±3.76%). The diametric structure showed a decreasing exponential trend. The highest mean diameter was obtained in Moungali at 1207.85±921.64 cm. This study has shown that Brazzaville's main arteries have a good diversity of flora, which needs to be managed rationally. These results can be used as reference data for the city's development program

    DiversitĂ© des Épiphytes Vasculaires de la ForĂȘt Secondaire de Koubola (DĂ©partement du Pool, District de Goma TsĂ©-TsĂ©) et de la ForĂȘt du Parc Zoologique de Brazzaville, RĂ©publique du Congo

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    Les plantes Ă©piphytiques contribuent Ă  la complexification naturelle des Ă©cotones en multipliant leurs habitats sur les arbres. Ils prĂ©sentent un intĂ©rĂȘt particulier pour comprendre le fonctionnement des Ă©cosystĂšmes tropicaux. L’étude a Ă©tĂ© rĂ©alisĂ©e dans la pĂ©riode de mais Ă  juin en RĂ©publique du Congo notamment dans la forĂȘt de Koubola et celle du parc Zoologique de Brazzaville sur une superficie totale de 1,2 ha, soit 3 parcelles de 50 m sur 40 m chacune par zone, sur lesquelles tous les Ă©piphytes se trouvant sur les arbres de diamĂštre ≄ 5 cm ont Ă©tĂ© dĂ©nombrĂ© aux diffĂ©rentes hauteurs. Le substrat sur lequel l’espĂšce est fixĂ©e a Ă©tĂ© notĂ©. Ainsi, dans la forĂȘt de Koubola 24 Ă©piphytes, 11 espĂšces, 10 genres et 9 familles ont Ă©tĂ© dĂ©nombrĂ©s. Agelanthus brunneus, les Loranthaceae, les Parasites et les Ă©piphytes accidentels dominent. Macaranga monandra (29,17 %) et Pentaclethra eetveldeana (25 %) sont les  deux arbres hĂŽtes les plus reprĂ©sentĂ©s en Ă©piphytes. Dans la forĂȘt du Parc Zoologique, 77 Ă©piphytes, 24 espĂšces, 20 genres et 17 familles ont Ă©tĂ© dĂ©nombrĂ©s. Platycerium angolense, lees Polypodiaceae et les Ă©piphytes stricts dominent. Millettia laurentii (36,36 %) et Elaeis guineensis (28,57 %) reprĂ©sentent les deux arbres hĂŽtes les plus abondants en Ă©piphytes. Les indices indiquent une diversitĂ© maximale et une rĂ©partition non Ă©quitable des espĂšces dans ces forĂȘts.   Epiphytic plants contribute to the natural complexification of ecotones by multiplying their habitats on trees. They are of particular interest for understanding the functioning of tropical ecosystems. The study was carried out in the forest of Koubola and Zoological Park on an area of 1.2 ha, including 3 plots of 50 m by 40 m each per area, on which all epiphytes found on trees of diameter ≄ 5 cm were counted at different heights. The substrate on which the species is fixed was noted. Thus, in the Koubola forest 24 epiphytes, 11 species, 10 genera and 9 families were counted. The species Agelanthus brunneus, the family Loranthaceae, Parasites and accidental epiphytes dominate. Macaranga monandra (29.17%) and Pentaclethra eetveldeana (25%) are the two most represented host trees in epiphytes. In the Zoological Park forest, 77 epiphytes, 24 species, 20 genera and 17 families were counted. The species Platycerium angolense, the family Polypodiaceae and the strict epiphytes dominate. Millettia laurentii (36.36%) and Elaeis guineensis (28.57%) represent the two most abundant epiphyte host trees. The indices indicate maximum diversity and non-equitable distribution of species in these forests
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