Dissertations / Theses on the topic 'Province de l' (Gabon)'
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Badra, Abdo, and Abdo Badra. "Diagnostic nutritif compositionnel CND d'un gazon en pâturin des prés (Poa pratensis L.) suite aux ajouts de N, P et K." Doctoral thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/37074.
Full textLa fertilisation du pâturin des prés (Poa pratensis L.), utilisée fréquemment comme graminée à gazon, requiert un dosage de N, de P et de K permettant de répondre aux attentes d’entretien extensif, intermédiaire ou intensif des espaces verts établis sur des sols de diverses classes texturales mais généralement variant de loameuse à sableuse telles les verts et les allées des terrains de golf, les terrains sportifs et municipaux, les champs de gazonnières, les terrains de jeux, les espaces verts résidentiels et scolaires, les abords de routes, les cimetières, les cours de tennis, etc. Beaucoup d’études sur la fertilisation du pâturin des prés ont été menées aux États-Unis sous climat tempéré chaud. De plus, le diagnostic nutritif du pâturin des prés, basé sur des concentrations critiques, ne tient pas compte des interactions entre les éléments nutritifs, conduisant à des diagnostics peu fiables. Afin de guider la fertilisation des gazons au Québec, il y a un double besoin de calibrer les besoins nutritifs du pâturin des prés selon la texture du sol et de développer des normes diagnostiques qui intègrent les interactions multiples à l’aide de méthodes numériques robustes telles le diagnostic nutritif compositionnel (Compositional Nutrient Diagnosis CND). Cette thèse vise donc à produire de nouvelles connaissances sur la fertilisation azotée, phosphorique et potassique du pâturin des prés pour l’entretien extensif, intermédiaire ou intensif des espaces engazonnés sous climat tempéré froid, également à développer et à valider des normes nutritives permettant de détecter tout déséquilibre nutritif. Le but ultime de l’entretien du pâturin des prés en espace vert est de produire un gazon de haute qualité visuelle. En fait, le rendement maximum des rognures de tonte n’est pas un attribut recherché. L’équilibre nutritif N : K est particulièrement nécessaire pour atteindre ce but. Une étude en plein champ fut réalisée pendant trois années consécutives pour évaluer les réponses quantitatives (le rendement des rognures de tonte et la biomasse souterraine) et qualitatives (la densité de tallage et la couleur du feuillage) du pâturin des prés (Poa pratensis L.) aux ajouts de 0 ou 50 à 300 kg N ha-1 an-1, de 0 ou 21,8 à 87,3 kg P ha-1 an-1, et de 0 ou 41,7 à 250 kg K ha-1 an-1, épandus également six fois par période de croissance sur un site en sol sableux qualifié de Norme U.S.G.A. pour les verts de golf et sur un autre site adjacent d’un sol natif loameux. Les normes CND ont été élaborées à l’aide des essais de fertilisation et validées à l’aide d’une base de données sur 318 spécimens provenant des gazonnières commerciales. Une réponse quadratique significative du rendement des rognures de tonte fut obtenue avec un maximum à 200 kg N ha-1 en loam et 300 kg N ha-1 en sable. Aux deux sites, l’ajout d’azote a réduit linéairement la biomasse souterraine et a significativement augmenté de façon quadratique la densité de tallage et la couleur du feuillage. Les ajouts de P et de K ne montraient aucune réponse significative sur le rendement des rognures de tonte ni sur la biomasse souterraine aux deux sites, non plus sur la densité de tallage et la couleur du feuillage au site loameux. Par contre, les ajouts de P et de K ont montré de faibles effets significatifs sur la couleur foliaire au site sableux. La transformation logarithmique centrée (clr = centred log ratio) des concentrations d’azote des rognures de tonte a réduit le degré d’inter-corrélation de 0,6 à 0,1 entre les éléments nutritifs lors de l’analyse en composantes principales, facilitant ainsi l’atteinte d’une distribution χ2 des indices du diagnostic nutritif compositionnel CND. En utilisant l’indice de déséquilibre critique CND r2 de 5,6 et un indice critique CND IN 2 de 1,5 pour un simplexe de cinq éléments nutritifs (N, P, K, Ca, Mg), la méthodologie CND a diagnostiqué 179 spécimens provenant des gazonnières commerciales à succès de 99 % comme étant déséquilibrés dont 110 en azote. Le diagnostic CND s’est avéré efficace pour déceler les niveaux d’azote des rognures de tonte chez le pâturin des prés en régie de gazon. La composition minérale foliaire du pâturin des prés, particulièrement la variable azote (N), influence significativement la qualité esthétique telle la densité de tallage et la couleur du feuillage. L’excès d’azote diminue la biomasse souterraine du gazon tout en augmentant la couleur du feuillage et la densité de tallage. Pour une croissance harmonieuse, il ne faut pas que l’amélioration de la qualité esthétique soit au détriment de la biomasse souterraine du pâturin des prés. À cette fin, un modèle de diagnostic nutritif compositionnel comprenant onze éléments nutritifs (N, S, P, K, Ca, Mg, B, Cu, Zn, Mn, Fe) a été développé en se servant des ratios logarithmiques centrés clr ainsi que des ratios logarithmiques isométriques ilr par lesquels les intervalles critiques établis d’après la qualité esthétique (la densité de tallage et la couleur du feuillage) ont été assujettis à la biomasse souterraine du pâturin des prés en phase d’entretien.
The fertilization of Kentucky bluegrass (Poa pratensis L.), managed as turfgrass, requires a dosage of N, P and K to sustain the performance of extensive, intermediate or intensive maintenance of turfgrass grounds established in diverse soil textures from loam to sand such as golf greens and fairways, sports fields, commercial sod farms, road sides, tennis courts, municipal grounds, play grounds, residential and school green space... A three-year field study was conducted to evaluate the quantitative (clipping yield and underground turf biomass) and qualitative responses (shoot density and foliage colour) of Kentucky bluegrass turf to added (0 or 50 to 300 N); (0 or 21.8 to 87.3 P), and (0 or 41.7 to 250 K) kg ha-1 yr-1 equally broadcast six times per growing season on sand site that met the U.S.G.A. specifications and native loam site. Many studies related to fertilization of Kentucky bluegrass were conducted in the United States under a temperate climate. On the other hand, the nutritional diagnosis of Kentucky bluegrass, usually based on critical nutrient concentrations, does not account for nutrient interactions leading to less reliable conclusions. In order to obtain a fertilizer guide for turfgrasses in Quebec, calibration of nutrient needs must relate to soil texture to develop diagnostic norms for Kentucky bluegrass that include multiple interactions based on robust numeric methods such as the compositional nutrient diagnosis (CND). This thesis puts forth a new knowledge in nitrogen, phosphorus and potassium fertilization of Kentucky bluegrass under extensive, intermediate or intensive green space management in the cold area of the temperate climate then develops and validates nutritional norms enabling the user to identify any unbalanced nutrition. The ultimate goal in Kentucky bluegrass maintenance is to produce a visual high-quality turf from an aesthetic point of view. The maximum clipping yield is not a characteristic to strive for. Rather, nutritional balance N: K is necessary to reach this objective. A threeyear field study was carried out to evaluate the quantitative (clipping yield and underground biomass) and qualitative (shoot density and foliage colour) responses of Kentucky bluegrass (Poa pratensis L.) to added 0 or 50 à 300 kg N, 0 or 21.8 à 87.3 kg P and 0 or 41.7 à 250 kg K ha-1 yr-1 equally spread six times per growing period on a sand site that met the U.S.G.A. sand specifications for golf greens (United States Golf Association) and another site of native loam. CND norms were developed based on fertilization responses and validated using data of 318 qualified specimens from commercial sod farms in Quebec. Clipping yields showed significant quadratic responses at 200 kg N ha-1 in the loam and 300 kg N ha-1 in the sand. On both sites, added nitrogen linearly reduced the underground biomass and showed a quadratic increase in shoot density and foliage colour. Added P and K did not show any significant response on clipping yield and underground biomass on both sites, nor on shoot density and foliage colour in the loam. However, added P and K showed some weak significant effects on foliage colour in the sand. The centred logarithmic transformation (clr = centred log ratio) of nitrogen concentrations in the clippings have reduced the degree of inter-correlation between nutrients from 0.6 to 0.1 in the principal component analysis and was amenable to a χ2 distribution of CND indices. Using a critical imbalance index CND r2 of 5.6 as χ2 value and a critical CND IN 2 of 1.5 for a five-nutrient simplex (N, P, K, Ca, Mg), CND diagnosed 179 qualified specimens as imbalanced of which 110 specimens were excessively high in N level (with a success rate of 99 %) among the total 328 qualified specimens taken from commercial sod farms. Consequently, CND norms proved to be effective in diagnosing the N status in Kentucky bluegrass clippings. The composition of foliar nutrients in Kentucky bluegrass, particularly nitrogen (N), can significantly influence its aesthetic quality such as shoot density and foliage colour. As a result, an overdose of added nitrogen can increase shoot density and foliage colour while reducing the underground biomass. For a balanced growth, the improvement of aesthetic quality should not be at the expense of the underground biomass. To this end, a diagnostic compositional model of eleven nutrients (N, S, P, K, Ca, Mg, B, Cu, Zn, Mn, Fe) has been developed using log-centered ratios clr and log-isometric ratios ilr whereby the critical ranges found in the aesthetic quality (shoot density and foliage colour) have been subjugated to the underground biomass of Kentucky bluegrass during its maintenance stage.
The fertilization of Kentucky bluegrass (Poa pratensis L.), managed as turfgrass, requires a dosage of N, P and K to sustain the performance of extensive, intermediate or intensive maintenance of turfgrass grounds established in diverse soil textures from loam to sand such as golf greens and fairways, sports fields, commercial sod farms, road sides, tennis courts, municipal grounds, play grounds, residential and school green space... A three-year field study was conducted to evaluate the quantitative (clipping yield and underground turf biomass) and qualitative responses (shoot density and foliage colour) of Kentucky bluegrass turf to added (0 or 50 to 300 N); (0 or 21.8 to 87.3 P), and (0 or 41.7 to 250 K) kg ha-1 yr-1 equally broadcast six times per growing season on sand site that met the U.S.G.A. specifications and native loam site. Many studies related to fertilization of Kentucky bluegrass were conducted in the United States under a temperate climate. On the other hand, the nutritional diagnosis of Kentucky bluegrass, usually based on critical nutrient concentrations, does not account for nutrient interactions leading to less reliable conclusions. In order to obtain a fertilizer guide for turfgrasses in Quebec, calibration of nutrient needs must relate to soil texture to develop diagnostic norms for Kentucky bluegrass that include multiple interactions based on robust numeric methods such as the compositional nutrient diagnosis (CND). This thesis puts forth a new knowledge in nitrogen, phosphorus and potassium fertilization of Kentucky bluegrass under extensive, intermediate or intensive green space management in the cold area of the temperate climate then develops and validates nutritional norms enabling the user to identify any unbalanced nutrition. The ultimate goal in Kentucky bluegrass maintenance is to produce a visual high-quality turf from an aesthetic point of view. The maximum clipping yield is not a characteristic to strive for. Rather, nutritional balance N: K is necessary to reach this objective. A threeyear field study was carried out to evaluate the quantitative (clipping yield and underground biomass) and qualitative (shoot density and foliage colour) responses of Kentucky bluegrass (Poa pratensis L.) to added 0 or 50 à 300 kg N, 0 or 21.8 à 87.3 kg P and 0 or 41.7 à 250 kg K ha-1 yr-1 equally spread six times per growing period on a sand site that met the U.S.G.A. sand specifications for golf greens (United States Golf Association) and another site of native loam. CND norms were developed based on fertilization responses and validated using data of 318 qualified specimens from commercial sod farms in Quebec. Clipping yields showed significant quadratic responses at 200 kg N ha-1 in the loam and 300 kg N ha-1 in the sand. On both sites, added nitrogen linearly reduced the underground biomass and showed a quadratic increase in shoot density and foliage colour. Added P and K did not show any significant response on clipping yield and underground biomass on both sites, nor on shoot density and foliage colour in the loam. However, added P and K showed some weak significant effects on foliage colour in the sand. The centred logarithmic transformation (clr = centred log ratio) of nitrogen concentrations in the clippings have reduced the degree of inter-correlation between nutrients from 0.6 to 0.1 in the principal component analysis and was amenable to a χ2 distribution of CND indices. Using a critical imbalance index CND r2 of 5.6 as χ2 value and a critical CND IN 2 of 1.5 for a five-nutrient simplex (N, P, K, Ca, Mg), CND diagnosed 179 qualified specimens as imbalanced of which 110 specimens were excessively high in N level (with a success rate of 99 %) among the total 328 qualified specimens taken from commercial sod farms. Consequently, CND norms proved to be effective in diagnosing the N status in Kentucky bluegrass clippings. The composition of foliar nutrients in Kentucky bluegrass, particularly nitrogen (N), can significantly influence its aesthetic quality such as shoot density and foliage colour. As a result, an overdose of added nitrogen can increase shoot density and foliage colour while reducing the underground biomass. For a balanced growth, the improvement of aesthetic quality should not be at the expense of the underground biomass. To this end, a diagnostic compositional model of eleven nutrients (N, S, P, K, Ca, Mg, B, Cu, Zn, Mn, Fe) has been developed using log-centered ratios clr and log-isometric ratios ilr whereby the critical ranges found in the aesthetic quality (shoot density and foliage colour) have been subjugated to the underground biomass of Kentucky bluegrass during its maintenance stage.
Boussougou, Boussougou Jean-Louis. "La préhistoire de la vallée de la Nyanga (province de la Nyanga) (Gabon)." Paris 1, 2010. http://www.theses.fr/2010PA010617.
Full textMatoumba, Martial. "Les sites paléolithiques de la province de la Nyanga (sud-ouest du Gabon)." Paris 1, 2008. http://www.theses.fr/2008PA010543.
Full textEssogo-Ba-Mintsa, Gabin. "Décentralisation municipale et modes de gestion de l'espace urbain : l'exemple des villes de la province de l'estuaire au Gabon." Grenoble 2, 2005. http://www.theses.fr/2005GRE29027.
Full textMouleba, Emma Prudence. "L' enseignement secondaire au Gabon sous l'angle du genre (1947-1983)." Paris 7, 2012. http://www.theses.fr/2012PA070022.
Full textThe study of secondary education in Gabon in terms of gender from 1947 to 1983 questions the place of girls in secondary education. Two main issues are addressed as well: the evolution of secondary education from 1947, on the one hand and the inclusion of the feminine element in the middle and high schools, on the other. One of the objectives is also to see if the school system set up in Gabon from independence (1960) has shown by a break or, conversely, is it a continuation of the colonial System. Furthermore, using the gender approach, this study assumes a reflection on gender inequalities in schools in general and secondary education in particular. It is based on a number of criteria: school objectives, methods of recruitment, educational buildings, and other examinations, enrollment, etc. The analysis highlights the differences between girls and boys. It in follows indeed that the girls are, a general perspective, marginalized in the secondary from 1947 to 1983. In other words, despite some progress observed from the sixties, girls are less active than boys at this level of education. The various obstacles to girls' education, maintained by the inherent inequalities in social sex roles justify the slowness of changes
Mambani, Jean-Bernard. "Aménagement du territoire et maîtrise spatiale : les dynamiques des paysages de la province de la Ngounié (Gabon)." Pau, 2007. http://www.theses.fr/2007PAUU1007.
Full textThe crisis of the Gabonese provinces continues and the quality of the life of the populations does not stop degrading. The politics of land settlement based on the model interventionist and which privileged an absolved centralization from the power gave the territorial disparities. It is spatially translated by a variety of the landscapes. That they are urban, rural or identical, these landscapes offer themselves to the glances of the walkers, the motorists and the researchers who scrutinize them in. For five years, the Gabonese authorities are in search of the ways of making up. They privilege for that purpose, the rotary holidays; they gave to the government the occasion to invest in the various provincial capitals: to restore, modernize and to improve cities. Unfortunately, the realizations are often there - down of the projections and expectations of the government and citizens. This impasse obliged us to look for another way of territorial development. Having summarized the main lines of the construction of the Gabon, the thesis bends over the province of Ngounié. It examines in the light of the notions, concepts and tools (remote sensing, cartography, photo-interpretation) the dynamics of the landscapes of the mentioned province. The thesis proposes “the provincialization” to end in a reasoned and mastered territorial development
Manganguéla, Bertille. "L' Etat, la justice et les justiciables au Gabon." Paris 1, 2002. http://www.theses.fr/2002PA010329.
Full textSello, Madoungou Leticia. "Le monde rural gabonais entre production et conservation." Thesis, Pau, 2013. http://www.theses.fr/2013PAUU1002/document.
Full textGabonese rural world is an area largely emptied of its populations, subjected for a long time to the pressures of the forestry development and, for about more than twenty years, to a very voluntary conservation policy. We have wanted to study the impact of these pressures on the contemporary rural world by focusing our work particularly on the conservation areas. It is in the province of Ogooué-Ivindo, around three national parks (Ivindo, Mwagné and Lopé) that we examined the activities of conservation and production, the actors involved as well as the conflicts which result from them. The history widely unfavorable to the rural world, the unequal distribution of wealth, infrastructures and services, benefiting almost exclusively the cities to the detriment of the rural areas and the conservation policies too binding for the rural populations have made it difficult for villages to survive. In despite of all this, they still exist - largely thanks to the local tradition. But, can possible solutions such as the attribution of community forests, introduced recently by the Gabonese state, bring villages back to life and make rural populations participate in the process of developing their localities? Beyond this question, this thesis seeks to initiate a process of reflection on possible actions to stop the extinction of the Gabonese villages
Mboutsou, Charles. "Les problèmes démographiques au Gabon : le cas de la migration intérieure et de la croissance démographique de la province de l'Estuaire de 1960 à 1993." Bordeaux 3, 2000. http://www.theses.fr/2000BOR30053.
Full textAbessolo, Mewono Fred-Paulin. "L' automobile à la conquête du Gabon des années 1940 aux années 1980 : de l'introductionà la généralisation du quatre roues." Aix-Marseille 1, 2006. http://www.theses.fr/2006AIX10031.
Full textELLA, ONDO BRUNO. "Geopolitique d'une peripherie gabonaise : le woleu-ntem et les echanges transfrontaliers." Paris 1, 1997. http://www.theses.fr/1997PA010680.
Full textWoleu-ntem is borded to the north by camerun, to the north-west by equatorial guinea and to the east by the republic of congo. Woleu-ntem's boundaries are the result of maint conventions: franco-german (1908) with camerun, franco-spanish (1905) with equatorial guinea. The boundary with the congo's republic is intra-imperial (franco-french). Woleu-ntem is suffering from much deseases that are to the origin of its underdevelopment: centralism of gabone's institutions, economic monolithism based upon the one secteur of agriculture. Add its economy and commercial dependance face to libreville and neighbouring countries. In fact, woleu-ntem's economy is not. Woleu-ntem economy depends on an underground economy. Hence its peripheric position. But at the end of this century, woleu-ntem can not to treat oneself the wealth of becoming the prisoner of centralism. An other offer is possible: integration in gabon- espace and integration in regional espace
Papy, Albert. "Réseaux de communication et développement territorial : cas des régions Ngounié et Nyanga (Sud Gabon)." Paris 7, 2011. http://www.theses.fr/2011PA070016.
Full textRich country, oil producer, Gabon records a very great deficit transport communications. With leaving Independence, the country adopted a land settlement policy which led to the development of the five-year plans of development. The objective was to disenclose the territory. The foregrounds and the policies led in the Sixties aimed at setting up road, airport national connections and telecommunications towards and between the chief towns of the provinces in order to introvertir the organization of the service roads to affirm the national unit and to support the development of the regions. Unfortunately, the accomplishments were not worthy of waitings. When the communication networks defective and are degraded, they do not play any more their function of connection and the economy just like suffers from it the areas, the case of Ngounié and Nyanga. It is time to leave them the underdevelopment for better integrating them economically and socially. The new policy of diversification of the economy installation by the Gabonese government to prepare after-oil, cannot lead without a considerable effort carried in the building of efficient networks of communication meeting needs of the country and able to serve the totality of the areas
Ombigath, Pierre. "L' exploitation forestière au Gabon (1892-1973) : impact économique et social." Paris 7, 2005. http://www.theses.fr/2005PA070009.
Full textIn the perspective to prepare the era of after petroleum, Gabon implemented since the 2001 a politics of diversification of its economy allowing to stimulate a durable growth. Among the main pillars of the economic reflation considered priority by the government is the forested sector. Taking advantage of good international capacities on this question since the Conference of United Nations on the Environment Development (CUNED) held in Rio de Janeiro (Brazil) in 1992, Gabon endowed of a new forested code in 2001. This new politics which insists on the durable management of forested ecosystems is sensible to increase the part of the forested incomes in the GDP of the country. However, interest aroused by the exploitation of the Gabonese forest does not date current. It goes bad: up to the period of the First World War during which were taken first measures recommending a rational exploitation of the forest. Well to accentuate the influence which can have this sector on the process of development of the Gabon in the years to come, we chose to interrogate past by insisting on the period 1892-1973 during which the forestry development occupied a dominating place in the economic and social life of this country
Sallée, Pierre. "L' arc et la harpe : contribution à l'histoire de la musique du Gabon." Paris 10, 1985. http://www.theses.fr/1986PA100008.
Full textEkwa, Ngui Mathieu. "Temps social et développement en milieu rural, cas de la province du Woleu-Ntem, Gabon." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0004/NQ31491.pdf.
Full textBeneteau, Jean-Luc. "Contribution a l'exploitation de l'infecondite du couple dans la province du haut-ogoue, gabon, 1986-1987." Poitiers, 1989. http://www.theses.fr/1989POIT1010.
Full textOslisly, Richard. "Préhistoire de la moyenne vallée de l'Ogooué (Gabon)." Paris 1, 1992. http://www.theses.fr/1992PA010563.
Full textThe Ogooue middle valley is a country particularly with a high palaeoclimatic samples and prehistoric remains content. The study of terrace deposits including lithic industries (OSA and MSA), stone-lines with picks (MSA) and clayey recovery with microlithic industry (LSA), provide an approach of the continental quaternary palaeoenvironment. The neolithic stage (3500-2300 bp) is caracterized by the first potters arrival. Since 2500 bp, the bantou metalworkers supplant them and engrave abstract and schematic representations of a rock art
Zan, Claudia. "Carbon storage in switchgrass (Panicum virgatum L.) and short-rotation willow (Salix alba x glatfelteri L.) plantations in southwestern Québec." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20614.
Full textAdiwas-Kouerey, Gervais. "La vie rurale dans les pays Myènè du delta intérieur de l'Ogooué (Gabon)." Bordeaux 3, 1986. http://www.theses.fr/1986BOR30029.
Full textAbessolo, Mezui Pierre. "Mise en valeur de l'Ogooué et structuration spatiale de son bassin." Aix-Marseille 2, 1986. http://www.theses.fr/1986AIX23005.
Full textBadjina, Egombengani Linda. "Dynamique des changements dans l'activité de la pêche au Gabon de 1900 à nos jours." Thesis, Bordeaux 2, 2011. http://www.theses.fr/2011BOR21897/document.
Full textThe aim of our study on the changes that have marked the development of artisanal fisheries in Gabon from the part of the province of the estuary was intended on the one hand, the support of record showing the organization of the fisheries sector during the colonial period and partly on the basis of surveys conducted in several villages, to understand the changes involved in this activity, which is currently moving from a traditional craft and another part more heterogeneous.This new framework assorted artisanal fisheries now appears first through the presence of fishing communities from various ethnic backgrounds, in which we observed rich interactions of sharing knowledge and know-how; Then, through interactions between fishing communities and the environment of the territories in which they are embedded. We have updated a population growth of players in this industry.Beyond the analysis of the dynamics of changes, we wanted to show a changing relationship between fishermen and their socio-political environment, economic on the one hand, and answer the other hand the problem of the joint between the dynamics of social change in these companies enjoyed riethniques and dynamics of the coastal area they share
Jenni, Sylvie. "Predicting yield and development of muskmelon (Cucumis melo L.) under mulch and rowcover management." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=42061.
Full textBoulingui, Jean-Eudes. "Inventaire des Ressources en Argiles du Gabon et leurs Utilisations Conventionnelles ou non dans les régions de Libreville et de Tchibanga." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0309/document.
Full textMaterials and clayey minerals abound in the Gabon. The pioneers works reveal the presence of red clays in the barrémian series of Agoula and red clays with violets in the neocomian series of Ndombo. Clays constitute a precious and plentiful resource which was widely beneficiated as well in traditional constructions of green clays as in terra-cotta in diverse places of the country. The present researches aim at inventorying the resources in various clays easily accessible in Gabon, and in the study of selection of deposits with application potential, according to the nature of clays. This work is carried on in the regions of Libreville and Tchibanga. The collected samples are the object of macroscopic, microscopic (tiny), chemical, structural and superficial analyses. Trials of formulation are the object of applications in the domains of bricks, tiles and refractories. The population growth of the Gabonese Republic generates a demand in diverse local materials satisfying the needs for the current life. The emphasis is put on the applications concerning terra-cottas: bricks, roof tiles and floor tiles. Zones of interest with economic potential are identified. Clays of the region of Libreville, rich in kaolinites and illite are interesting for applications in terra-cotta. The characterization of the mineralogical properties of the clayey rocks is realized with the aim of identifying the most interesting industrial uses. Characterizations and tests of applications, identify raw materials for the construction, the ceramic, but also in many other domains as pharmacology (galenic), paper industry, cosmetics, food-processing industry, rubber, paint, civil engineering and environment engineering. As in all the countries of Central Africa, the sustainable development passes inevitably by a control of the local resources. The fine characterization of clays of the Cretaceous of Libreville is realized by: X-ray Diffraction, Fourier transform infrared spectroscopy, scanning electronic microscopy, determination of the cation exchange capacity, particle size analysis, chemical analyses, plasticity index, ceramic tests. According to the X-ray diffraction, these clays are mixtures of kaolinite, and/or illite and montmorillonite, quartz, ± muscovite, ± microcline, ± hematite, ± rutile ± anatase. The observation in Scanning Electron Microscopy and the treatment with Ethylène Glycol or heating at 550°C in XRD confirms the dominating presence of these minerals
Saint-Jean, Armande 1945. "L' Evolution de l'éthique journalistique au Québec de 1960 à 1990." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41222.
Full textFrom this analysis, the author is able to draw a theory of displacements that is submitted as an interpretative model to explain the evolution of journalistic ethics in Quebec between 1960 and 1990. This theory shows that the main characteristics of this evolution lie in a series of progressive changes (1) in the levels of responsibility towards ethics, which engenders a general abandonment of such responsibilities; (2) in the definition of fundamental principles on which the press operates, namely freedom of the press, public right to information, and Social Responsibility, which is doubled by a relative failure of the self-regulation model of press ethics management; and (3) in many areas related to journalists' role and status, namely autonomy, adversary positions, social involvement, conflicts of interests and the definition of news itself.
Karatha, Diba Serge. "L' université du Gabon 1959-1986 : jeu des acteurs dans sa création et sa gestione : contribuer à l'histoire culturelle de l'Afrique centrale." Aix-Marseille 1, 2010. http://www.theses.fr/2010AIX10003.
Full textEdzegue, Mendame Aristide. "L' Europe et les pays ACP du traité d'Association à la Convention de Lomé IV : l'exemple de la Coopération entre l'Union européenne et le Gabon (1957-2000)." Nantes, 2009. http://www.theses.fr/2009NANT3037.
Full textCote, John Christopher. "The impact of predevernalization and plasticulture treatments on bolting of celery (Apium graveolens L.) grown in Quebec /." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33742.
Full textHusain, Saima. "Effects of nitrogen fertilizer rate and irrigation on the annual culture of globe artichoke (Cynara scolymus L.) in Quebec." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19697.
Full textPhaneuf, Edith. "Description and study of a Phoma sp., a new fungal pathogen of lupines (Lupinus albus L.), in Québec." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20838.
Full textJadinon, Rémy. "Du religieux au commercial: Créativité musicale et circulation numérique dans les compositions des harpistes MITSƆGƆ de la province de la Ngounié au Gabon." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/253703.
Full textDoctorat en Sciences politiques et sociales
info:eu-repo/semantics/nonPublished
De, Asis Ines Nicole Echevarria. "The epistemic province of photography." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/8963.
Full textKoumba-Mouity, Germain. "L' usage vernaculaire et-ou véhiculaire du français scolaire : étude de l'orthographe : comparaison de collégiens gabonais et français." Paris 8, 2004. http://www.theses.fr/2004PA082499.
Full textOur study “the use of vernacular and/or common french. Study of orthography. Comparison between gabonese and french schoolchildren” allowed us to compare how successful are the french first form schoolchildren of prioritary education area from paris suburban and the gabonese first form schoolchildren from rural and urban milieu, aged eleven to thirteen in spelling mistakes when both applying for a same exercise of dictation. The out comes have been compared to those of the two previous studies led by Beuvain in 1873 and by Chervel et Manesse in 1987. We drew up a typology of spelling mistakes from the french orthographic plurisystem led by Nina Catach. 1. All patterns make twice more mistakes as those of the 19th and 20th c. Schoolchildren. 2. The difficult words of the 19th and 20th c. Remain the same in the year 2003. The mistakes are of same types. 3. The gabonese schoolchildren from rural milieu make less mistakes than the gabonese schoolchildren from the urban milieu and the french schoolchildren from the prioritary education area and are best in grammar and orthography. We looked for why some schoolchildren make such mistakes, the orthographic understanding are seldom serious. We try beyond the study of performance, the study of orthographic skills. For each type of mistake, we match it with understanding why this mistake occurs
Kipkech, Francis Chepkonga. "The effects of sugar maple (Acer saccharum Marsh.) and black walnut (Juglans nigra L.) on soil fertility : preliminary assessment of their agroforestry potential." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23403.
Full textIn the second study, the effects of black walnut (Juglans nigra L.) on growth and nutrient content of lettuce (Lactuca sativa L.), kale (Brussica oleracea L.), parsley (Petroselinum crispum) and Swiss chard (Beta vulgaris L.) in an alley cropping system were determined. The experiment was carried out in a randomized complete block design with repeated measures. All vegetables survived in the black walnut plantation and in the open field. The order of sensitivity to growth under black walnut was Swiss chard $>$ kale $>$ lettuce $>$ parsley. Low light intensity in the plantation likely decreased plant dry weights and nutrient content. Generally plant N, P and K concentrations were higher in the plantation while Ca, Mg and Mn concentrations were higher in the open field, possibly due to an antagonistic effect of high soil K$ sp+$ content in the plantation and to inhibitory effects of black walnut.
Moundaka, Iris ursula. "Obstacles à l'accès aux soins d'urgences suite aux complications des avortements non sécurisés dans la province du Moyen Ogooué au Gabon : aspects juridique, socioculturel et médical." Thesis, Paris 8, 2014. http://www.theses.fr/2014PA080040.
Full textThis dissertation begins with a broad overview of juridical and historical controversies surrounding abortion in the world followed by an analysis of attitudes and practices in diverse socio-cultural contexts linked to gender relations, unwanted pregnancy and unsafe abortion. We then examine articulations between traditional, colonial and modern medicine in Gabon. That panorama brings us to our study of the obstacles women with medical emergencies face in accessing modern health care.The objective of this doctoral research is to elaborate and apply a methodology for studying the network of actors involved in practices connected to abortion in order to better understand resistance to socio-clinical and juridical change. What is the formal and informal health care system of medical providers in matters related to abortion and what are the obstacles that providers and women must transverse to offer (providers) and obtain (women) this service? Specifically, an investigation of social and institutional interactions was conducted in urban hospital settings and in surrounding rural areas. That led us to detect different extra-medical and intra-medical barriers to emergency care access following unsafe abortion complications. In this way, we focused, on one side, upon the discourse, practices and medical contexts of health professionals while, on the other side, privileging the accounts women recited of their strategies for terminating pregnancies with or without medical help and for accessing modern care despite the obstacles.Content analysis of interviews revealed major barriers to emergency care access. Those difficulties start in the social environment with the search for abortion products and for initial treatments (self-medication and visits to the pharmacy or to traditional practitioners). In cases of advanced complications, extra-medical obstacles intensify with greater geographic distance, transportation problems and insufficient financial means. Moreover, once those obstacles are more or less overcome, women must then confront intra-medical obstacles within emergency care hospital units. Providing access to safe abortion for Gabonese women in current times is one of the great challenges we must confront. This dissertation contributes to a loud vocal denunciation of informal happenings in the society of Gabon. Women live tragic circumstances
Rémillard, Michel. "Effect of hybrids, plant populations, rates of fertilizer and irrigation on soil test levels, field and nutrient uptake with corn (Zea mays L.) in Quebec." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61270.
Full textHigh rates of fertilization increased soil test P and K but decreased soil test Ca and Mg and soil pH. Irrigation decreased soil test K, Ca and Mg. In both years maximum grain yields (at 15.5% moisture) were obtained when all factors were at high levels. Hybrid Pioneer 3925 and and hybrid CO-OP 2645 produced a maximum yield of 11.9 and 15.2 Mg ha$ sp{-1}$ in 1984 and 1985, respectively. Increasing plant population alone increased grain yield from 9.6 to 10.4 Mg ha$ sp{-1}$ in 1984, bu increases in grain yield with high plant population in 1985 could only be obtained when high rate of nutrients and supplemental irrigation were applied.
Nutrient uptake was usually greater for hybrid 2645 than hybrid 3925 in 1985, and greater for hybrid 3925 than for hybrid 3949 in 1984. Increasing plant population, rate of fertilization as well as available soil moisture generally brought about greater nutrient uptake. Ear leaf nutrient concentration at silking time was influenced by these factors but the differences obtained were not agronomically significant.
St-Louis, Sophie. "Resistance of common ragweed (Ambrosia artemisiifolia L.) to the herbicide linuron and evaluation of several species of pathogenic fungi for its biological control." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33447.
Full textPezzente, Mauro. "Effects of urban environmental conditions on the symbiosis between vesicular-arbuscular mycorrhizal fungi and silver maple (Acer saccharinum L.)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0002/MQ29764.pdf.
Full textLoubaki-Kaya, Eudes Sabas. "L' évolution du droit des relations de travail dans les pays d'Afrique noire francophone : les cas du Congo et du Gabon (étude comparée)." Aix-Marseille 3, 2002. http://www.theses.fr/2002AIX32052.
Full textFlexibility, mondialisation and employability are keys words in the context of our African reality. In order to adapt, the Congolese labour laws have been ambitiously reoriented towards an economic finality, whereas the labour of Gabon still retain a purely protective finality. Unfortunately, the former, owing to its liberal orientation, only imperfectly ensures the rights and guarantees of the workers. The protectionism which characterises the latter country has a creed of overbearing legalistic positivism, and as an instrument rigid and all embracing rules whose volume, incessant flow and incoherence as regards market economy and the OHADA, cannot but give rise to confusion and interrogations. Between flexibility and rigidity, an extension of the role of collective negociation would appear to be the ideal means to adapt to the changes which are taking place. This would entail total participation by the Congolese and the Gabonese Unions. It is no longer a question of simply negiciating additional advantages but of the actual contents of the rules to be applied. At the same time, the extreme poverty of the rural populations must lead Congo and Gabon to move beyond programmes of stabilisation and structural adjustments, in order to launch growth strategies to create jobs. Tha adaptation of labour laws in rural areas leads naturally to a redifinition of the word "worker" and would seem to necessitate a new right : the right to a job or professional activity. Whence comes the necessity for a normative modification of the basis of labour laws in French speaking countries of Central Africa (in a general way). This new ideal of working relations which moves from the idea of work towards that a job in the sense of a professional activity must not however lead us to anticipate a change of rationality in the way in which working relations are understood in the legal sense. As far as social security systemes are concerned, they are rudimentary in both countries, althought the Gabonese is moving towards universality
Asbil, Wendy. "Early spring broadcast seeding to improve established stands of alfalfa (Medicago sativa L.)." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61956.
Full textMedina-Ross, Jose Antonio. "Study on phosphorus desorption and availability to soybean (Glycine max L.) in two phosphorus rich Gleysolic soils under different tillage and fertilization practices." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=21609.
Full textMosiane, M. S. "Diamondback Moth, Plutella xylostella (L.), (Lepidoptera: Plutellidae ), and Other Insects of Canola, Brassica napus L., in Gauteng Province, South Africa." Thesis, Rhodes University, 2002. http://hdl.handle.net/10962/d1018250.
Full textDernovici, Serghei. "Susceptibility of sunflower to Ophraella communa LeSage (Coleoptera:Chrysomelidae), a candidate for the biological control of common ragweed (Ambrosia artemisiifolia L.)." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80250.
Full textBombardier-Cauffopé, Christine. "Dynamique de régénération du thuya occidental (Thuja occidentalis L ) dans les vieilles forêts mixtes sur sol mésique." Master's thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/30436.
Full textAymes, Marc. "L' accent de la province : une histoire des réformes ottomanes à Chypre au XIXe siècle." Aix-Marseille 1, 2005. http://www.theses.fr/2005AIX10042.
Full textHosseini, Seyed Ali, Seydeh Zohreh Mirdeilami, Fatemeh Ghilishli, and Mohammad Pessarakli. "Estimating nutritive values of Jasminum fruticans L. plant species in northern rangelands of Golestan province." Taylor & Francis, 2017. http://hdl.handle.net/10150/626137.
Full textPotvin, Maryse. "L'appartenance et la participation dans un Québec en mutation : l' expérience de deux générations d'origine hai͏̈tienne au cours des années 1990." Paris, EHESS, 2002. http://www.theses.fr/2002EHES0032.
Full textThe object of this thesis is the construction of a social "expérience" among two generations of Haitians in Quebec, as captured through five "sociological interventions" during the 1990's. The first chapter presents the concepts used to construct an analytical schema of "expérience", that relates several elements: citizenship, racism, group identifications and participation. Chapter 2 presents the "Politics of Citizenship" in Canada and Quebec, and points out the historical transformations of ethnic relations and issues of pluralism. Chapter 3 examines the specificities and the "objective" living conditions of the Haitian population in Quebec in several spheres of social life. Chapter 4 analyzes the results of the "sociological interventions" and the articulation of the analytical elements by the actors to construct their own "expérience". The thesis concludes with a comparative synthesis of both generations and of group's "expérience"
Marsan-Pelletier, Félix. "Enquête sur la petite herbe à poux (Ambrosia artemisiifolia L) résistante à l'imazéthapyr au Québec." Master's thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/35073.
Full textCôté-Roberge, Myriam, and Myriam Côté-Roberge. "Contexte tectonométamorphique du nord-ouest du Complexe de Laguiche, sous-province d'Opinaca, Eeyou Itschee Baie-James." Master's thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/34575.
Full textLa Sous-province d’Opinaca, située dans le craton du Supérieur, est un important bassin néoarchéen de sédiments métamorphisés. Les modèles tectoniques disponibles pour la formation puis l’évolution de l’Opinaca sont variés, allant du prisme accrétionnel au bassin d’arrière-arc. L’étude tectonométamorphique proposée permet de définir le parcours prograde de la région et ainsi discriminer les modèles probables, chacun impliquant une progression du métamorphisme distincte. Dans le nord-ouest de la Sous-province d’Opinaca, des isogrades tracés à partir de minéraux indicateurs du métamorphisme soulignent une progression du faciès des schistes verts dans le nord-ouest au faciès supérieur des amphibolites au sud-est. L’étude de la chimie minérale des minéraux métamorphiques révèle une homogénéisation généralisée des zonations chimiques. Les relations texturales observées dans le secteur au nord de l’Opinaca et une modélisation de l’équilibre des phases indiquent un chemin P-T-t en sens horaire avec un segment en décompresson de 6 à 4 kbar, à ~ 600 °C. Dans la partie sud du secteur d’étude, le chemin PTt est caractérisé par une décompression isothermique suparsolidus de 9 à 5 kbar, à ~ 800 °C, L’âge de la sédimentation est définie par les populations de zircons détritiques et le recoupement d’intrusifs felsiques entre 2712 Ma et >2690 Ma selon les secteurs. La géochronologie U-Pb sur des monazites indiquent deux pics de métamorphisme, à ~ 2670 et ~ 2645 Ma. La datation des grenats avec le système Lu-Hf indique que la croissance du grenat correspond à la plus jeune génération de monazite, circa 2645 Ma. La première génération de monazite est interprétée comme liée à un événement métamorphique de basse pression n’impliquant pas la croissance de grenat. Ces résultats permettent de proposer pour l’évolution du bassin d’Opinaca un polymétamorphisme dans un environnement géodynamique d’inversion tectonique d’un basin. Après la sédimentation, un premier épisode métamorphisme de haute température affecte le bassin en extension vers 2670 Ma. Vers 2645 Ma, la fermeture du bassin et l’épaississement crustal provoque un deuxième épisode de métamorphisme, de type barrovien, caractérisé par une décompression isothermale possiblement aidée par un certain degré d’extrusion ductile
The Opinaca Subprovince, in the Superior craton, is an important Neoarchean metamorphosed sediments basin. Various models are proposed to explain the formation and evolution of the Opinaca, ranging from accretional prism to back-arc basin. The proposed tectonometamorphic study allows the determination of the prograde evolution of the basin and hence the selection of the most probable regional model, each being characterized by contrasting styles of metamorphic progression. In the north-western Opinaca Subprovince, isograds traced from index minerals highlight a progression from greenschist facies in the north-west to upper amphibolites facies in the south-east. The chemistry of metamorphic minerals shows a global homogenisation of growth zonation. In the northernmost Opinaca Subprovince, textural relations and phase equilibrium modelling indicate a clockwise PTt path with an isothermal decompression segment from 6 to 4 kbar at ~ 600 °C. In the southern part of the study region, the clockwise PTt path is characterized by stronger, suprasolidus isothermal decompression from 9 to 5 kbar at ~ 800 °C. We constrain deposition of the Opinaca greywacke from 2712 to 2690 Ma with the youngest detrital zircon population and crosscutting felsic intrusions. U-Pb monazite geochronology indicates two pulses of metamorphism, at ~2670 and ~ 2645 Ma. Lu-Hf dating of garnet supported by textural analysis and trace element mineral chemistry indicates that garnet growth is coeval with the younger population of monazite, circa 2645 Ma. The first generation of monazite around 2670 Ma is thus interpreted as a low-pressure metamorphic event that did not involve garnet growth. These results point towards a polymetamorphic evolution for the Opinaca Subprovince consistent with the tectonic inversion of a rift-like basin. Clastic sedimentation between 2712 to 2690 Ma in a magmatically active, rift-like basin was followed by regional low-P metamorphism at 2670 Ma. The onset of crustal shortening and thickening in the basin by 2645 Ma resulted in Barrovian-type metamorphism, and involved isothermal decompression that could have been accommodated by some degree of ductile extrusion.
The Opinaca Subprovince, in the Superior craton, is an important Neoarchean metamorphosed sediments basin. Various models are proposed to explain the formation and evolution of the Opinaca, ranging from accretional prism to back-arc basin. The proposed tectonometamorphic study allows the determination of the prograde evolution of the basin and hence the selection of the most probable regional model, each being characterized by contrasting styles of metamorphic progression. In the north-western Opinaca Subprovince, isograds traced from index minerals highlight a progression from greenschist facies in the north-west to upper amphibolites facies in the south-east. The chemistry of metamorphic minerals shows a global homogenisation of growth zonation. In the northernmost Opinaca Subprovince, textural relations and phase equilibrium modelling indicate a clockwise PTt path with an isothermal decompression segment from 6 to 4 kbar at ~ 600 °C. In the southern part of the study region, the clockwise PTt path is characterized by stronger, suprasolidus isothermal decompression from 9 to 5 kbar at ~ 800 °C. We constrain deposition of the Opinaca greywacke from 2712 to 2690 Ma with the youngest detrital zircon population and crosscutting felsic intrusions. U-Pb monazite geochronology indicates two pulses of metamorphism, at ~2670 and ~ 2645 Ma. Lu-Hf dating of garnet supported by textural analysis and trace element mineral chemistry indicates that garnet growth is coeval with the younger population of monazite, circa 2645 Ma. The first generation of monazite around 2670 Ma is thus interpreted as a low-pressure metamorphic event that did not involve garnet growth. These results point towards a polymetamorphic evolution for the Opinaca Subprovince consistent with the tectonic inversion of a rift-like basin. Clastic sedimentation between 2712 to 2690 Ma in a magmatically active, rift-like basin was followed by regional low-P metamorphism at 2670 Ma. The onset of crustal shortening and thickening in the basin by 2645 Ma resulted in Barrovian-type metamorphism, and involved isothermal decompression that could have been accommodated by some degree of ductile extrusion.
Witte, Malte Verfasser], and Peter [Akademischer Betreuer] [Kremsner. "Characterization of the epidemiology of major infectious diseases in the rural region of Tsamba-Magotsi in la Ngounie province in Gabon / Malte Witte ; Betreuer: Peter Gottfried Kremsner." Tübingen : Universitätsbibliothek Tübingen, 2017. http://d-nb.info/116550698X/34.
Full textWitte, Malte [Verfasser], and Peter [Akademischer Betreuer] Kremsner. "Characterization of the epidemiology of major infectious diseases in the rural region of Tsamba-Magotsi in la Ngounie province in Gabon / Malte Witte ; Betreuer: Peter Gottfried Kremsner." Tübingen : Universitätsbibliothek Tübingen, 2017. http://d-nb.info/116550698X/34.
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