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Artigos de revistas sobre o assunto "Bougouni (Mali)":

1

Sogoba, Nafomon, Kyle Rosenke, Jennifer Adjemian, Sory Ibrahim Diawara, Ousmane Maiga, Moussa Keita, Drissa Konaté et al. "Lassa Virus Seroprevalence in Sibirilia Commune, Bougouni District, Southern Mali". Emerging Infectious Diseases 22, n.º 4 (abril de 2016): 657–63. http://dx.doi.org/10.3201/eid2204.151814.

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2

Chappatte, André. "Night life in southern urban Mali: being a Muslimmaquisardin Bougouni". Journal of the Royal Anthropological Institute 20, n.º 3 (28 de julho de 2014): 526–44. http://dx.doi.org/10.1111/1467-9655.12121.

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Sidibé, Souleymane S., K. W. Coulibaly, Martin Dakouo, Z. Tarnagda, Amadou Sery, Mamadou Niang, K. Traoré, H. Nantoumé, Siaka Diarra e H. Seyni. "Fièvre Q chez les petits ruminants au Mali. Résultats d'une enquête sérologique". Revue d’élevage et de médecine vétérinaire des pays tropicaux 66, n.º 1 (1 de janeiro de 2013): 11. http://dx.doi.org/10.19182/remvt.10144.

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Au Mali, les pertes en reproduction constituent des contraintes majeures à l’amélioration de la productivité de l’élevage des petits ruminants. Parmi les causes de ces pertes qui demeurent mal connues figurent, entre autres, l’infertilité, les avortements, l’orchite et la chétivité. L’objet de la présente étude a été d’évaluer la prévalence sérologique de la fièvre Q dans les élevages de petits ruminants où des cas de pertes en reproduction ont été observés, ainsi que la valeur financière des pertes liées aux avortements enregistrés. L’étude a été conduite entre 2006 et 2009 dans les zones agropastorales des localités de Bougouni (région de Sikasso), Nioro (région de Kayes), Kéniébougouwéré (région de Ségou) et Koro (région de Mopti). Sur les 718 sérums analysés par la méthode Elisa indirecte, 155 (21,5 ± 3 p. 100) se sont révélés positifs aux anticorps de Coxiella burnetii. Cette prévalence a varié en fonction des sites et du rang de portée. La prévalence la plus élevée a été observée à Kéniébougouwéré (35 ± 6 p. 100), suivi de Nioro (28,5 ± 7,5 p. 100), puis de Bougouni (10,8 ± 4,6 p. 100), et la plus faible à Koro (5,8 ± 3,7 p. 100). Des études complémentaires intégrant le diagnostic moléculaire (technique PCR) pourraient aider à élucider le rôle étiologique de cette pathologie dans les cas de pertes en reproduction couramment enregistrés chez les petits ruminants au Mali. L’analyse technico-économique a permis d’évaluer la valeur financière des pertes.
4

VANYUKOVA, Darya. "2022 Expedition to Mali". Oriental Courier, n.º 1 (2022): 86. http://dx.doi.org/10.18254/s268684310021414-3.

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The 2022 field season (January 23 – February 23) turned out to be very productive: we managed to clarify the history of Dogon migrations from the Mande Country to the Bandiagara Highlands. We received quite complete information on the prophet Abirɛ, who predicted the return of Dogon to their historical homeland and completely new information about Bozo and Bambara puppets. Finally, we acquired many interesting artifacts for the State Museum of Oriental Arts. Due to the inability to arrive to the Dogon Country, it was decided to focus on the area of the city of Bougouni (Sikasso region) in southern Mali and on the Mande Country (regions of Koulikoro and Kayes, from the city of Kangaba in the west to Bamako in the east). Two magnificent, beautifully attributed works of traditional Bambara art were acquired in Bougouni for the collection of the State Museum of Oriental Arts: “Monkey” (Warabilen) and “Wild buffalo” (Sigi; Sigifin) masks. During the expedition, new and very significant data were obtained on the migrations of the Dogon from the Mande Country to the Bandiagara Highlands. A lot of information has now been accumulated regarding how the Dogon came to their new homeland. They were published, including in Russian. But the Manding oral traditions about the exodus of Dogon are still little known. We have partially succeeded in making up for this shortcoming. Oral historical traditions about the exodus of the Dogon from the Mande Country are changeable, internally contradictory and extremely unstable narratives with confused chronology, filled with omissions and vague allusions. However, some conclusions can still be drawn: there is almost no doubt that the root cause of the Dogon leaving for the lifeless rocks of Bandiagara was some kind of difficult and bloody conflict, accompanied by numerous victims. It is also clear that there were several waves of resettlement, and the last Dogon left for the highlands in the middle of the second half of the 19th century. It was also possible to find out that the Bambara and Bozo puppets are not at all a secularized popular theater. The puppet society is associated with the Koré secret society, and is perhaps one of the most powerful Bambara societies, which in this case refers to three ethnic groups: the Bambara proper, the Bozo (Dogon partners in a marriage-prohibitive joking relations) and the Marka (Soninké). Ceremonies involving puppets are completely sacred (only members of the Society take part in them), semi-sacred (only men take part in them), and, finally, publicly available — everyone, including women and children, takes part in them.
5

Sidibe, S., KW Coulibaly, A. Sery, M. Fofana, F. Sidibe e M. Kanoute. "Prévalence de la brucellose, chlamydiose et toxoplasmose chez les petits ruminants au Mali : résultats d'une enquête séro-épidemiologique". Revue Malienne d'Infectiologie et de Microbiologie 13, n.º 1 (1 de maio de 2019): 1–9. http://dx.doi.org/10.53597/remim.v13i1.1298.

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Au Mali, l'élevage des espèces à cycle court en général et celui des petits ruminants en particulier constitue une source précieuse de revenus et de protéines pour les populations. Cependant, au nombre des contraintes à l'amélioration de la productivité de cet élevage, figurent les pertes en reproduction, dont les causes demeurent mal connues. Les données relatives au rôle de certaines infections microbiennes comme la brucellose à Brucella ovis, chlamydiose et la toxoplasmose sont quasi inexistantes. L'objet de la présente étude a été d'évaluer la prévalence sérologique de ces pathologies, susceptibles de causer des pertes en reproduction chez ces espèces animales. Elle a couvert quatre sites dont Kéniébougou (Cercle de Ségou), Nioro (Cercle de Nioro), Bougouni (Cercle de Bougouni) et Briga (Cercle de Koro), choisis en collaboration étroite avec les services techniques d'encadrement et éleveurs de petits ruminants desdites localités. Au total 872 sérums (368 ovins et 504 caprins) issus des sujets présentant des signes de perte en reproduction ont été testés par la méthode Elisa indirecte. Parmi ceux-ci, 81 (9,28 %) se sont révélés positifs (1,26 % en brucellose à Brucella ovis, 3,55 % en chlamydiose à Chlamydia abortus et 4,47 % en toxoplasmose à Toxoplasma gondii). Les anticorps mis en évidence sont considérés comme d'origine infectieuse, les animaux n'ayant jamais été vaccinés contre les maladies investiguées, ce qui confirme la circulation des agents étiologiques des trois infections abortives parmi les populations de petits ruminants au Mali.
6

Keita, Sidiki, Koniba Keita, Mahamadou Coulibaly, Moussa Sissoko, Lamine Soumare, Oumar Sacko, Sekou Koumaré et al. "Peritonitis Management through Appendicular Perforation in the Department of Surgery Bougouni Hospital (Mali)". Surgical Science 11, n.º 12 (2020): 446–52. http://dx.doi.org/10.4236/ss.2020.1112046.

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Traoré, Siaka Drissa, Moro Souley Sidibé, Kapoury Sanogo, Urbain Dembélé, Djigui Dembélé, M'Piè BENGALI e Kalifa Traoré. "EVALUATION OF THE EFFECTIVENESS OF THE CONTRIBUTION OF AGRICULTURAL LIME AND NATURAL PHOSPHATE OF TILEMSI (PNT) ON THE PRODUCTION OF COTTON AND CORN IN THE PRODUCTION SYSTEM OF FARMS IN THE MALI-SOUTH ZONE". International Journal of Agriculture, Environment and Bioresearch 08, n.º 03 (2023): 119–29. http://dx.doi.org/10.35410/ijaeb.2023.5833.

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In the south of the Sahara, the cultivation of land leads to a rapid decrease in nutrients and the appearance of deficiencies in nitrogen, phosphorus, magnesium, calcium, and other elements. The major constraint of production in this area on agricultural soils is the low level of soil fertility. The objective of this study was to evaluate the effects of different amendment formulas on cotton and maize yields as well as their financial returns in order to propose a recommendable formula. To achieve this objective, the experimental set-up used was a dispersed series of five treatments of 3125 m² per school field in 6 villages in the circles of Sikasso, Koutiala and Bougouni, with each village constituting a replication. Four formulations were tested in addition to the farmer's practice, namely (i) agricultural lime (300 Kg/ha) combined with 300 Kg/ha of TNP, (ii) agricultural lime (500 Kg/ha) combined with 500 Kg/ha of TNP, (iii) agricultural lime at a dose of 300 Kg/ha and agricultural lime at a dose of 500 Kg/ha. Analysis of the results shows that the effect of the amendments varies according to the site (soil acidity level). The best marginal rates of return were recorded in Sikasso with T5 (665%), which is well above the recodable minimum (50-100%), followed by T2 (195%) at the same site. The T4 treatment remains the optimal treatment in Koutiala because it has the lowest recommendation rate (52%) compared to the farmer's practice. We also noted that all treatments in Bougouni were dominated by the farmer's practice. With respect to the evaluation of after-effects, treatments T4 and T3 remain the satisfactory treatments in Bougouni, while in Sikasso it is T4 and T2 provided the best after-effects.
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Mariam, D., TCA Bernadin e TM Inoussa. "Inventaire des vergers de mangues dans le cercle de Bougouni au Mali : Approche par Télédétection". Journal of Applied Biosciences 66 (8 de outubro de 2013): 5095. http://dx.doi.org/10.4314/jab.v66i0.95007.

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Traoré, N. K. "Etude des facteurs associés à la non compliance au traitement de masse ciblant les Schistosomiases dans le District Sanitaire de Bougouni, Bankass et Tominian". Mali Santé Publique 10, n.º 1 (24 de julho de 2020): 71–78. http://dx.doi.org/10.53318/msp.v10i1.1666.

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Introduction : La schistosomiase constitue un enjeu de santé publique d'envergure mondiale, affectant le plus souvent les enfants, elle semble être liée au développement et l'augmentation des réseaux d'irrigation. L'efficacité des traitements de masse (TDM) ciblant les schistosomiases reste compromise par la non compliance au Mali. L'objectif était d'étudier les facteurs associés à la non compliance au TDM dans trois districts sanitaire : Bougouni, Bankass, et Tominian. Matériel et méthodes : Il s'agissait d'une étude transversale avec analyse secondaire des données de 2277 participants âgés de 5 - 14 ans et/ou leurs parents issues de l'enquête réalisée de juin à décembre 2017 dans les districts sanitaires de Bankass, Bougouni et Tominian. La non compliance a été évaluée en utilisant une analyse uni et multi variée (régression logistique) avec le logiciel STATA version13. Résultats : La religion (p=0,0001), la profession du père (p=0,006), la peur des effets secondaires (p=0,001) et la présence d'hématurie terminale (p=0,001) ont été trouvées statistiquement associées à la non compliance. En terme de contribution au model, la religion explique plus la non compliance, suivie de la peur des effets secondaires avec respectivement 43,79%, 18,79%, le sexe contribue moins avec seulement 1,09%. Conclusion : La religion, la profession du père, la peur des effets secondaires et la présence d'hématurie terminale étaient des facteurs statistiquement associés à la non compliance. Une intervention basée sur l'éducation sanitaire serait nécessaire afin de minimiser le taux de non compliance au TDM ciblant les schistosomiases.
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Traore, Kalifa, e Birhanu Zemadim Birhanu. "Soil Erosion Control and Moisture Conservation Using Contour Ridge Tillage in Bougouni and Koutiala, Southern Mali". Journal of Environmental Protection 10, n.º 10 (2019): 1333–60. http://dx.doi.org/10.4236/jep.2019.1010079.

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Teses / dissertações sobre o assunto "Bougouni (Mali)":

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Bertrand, Monique. "Question foncière et villes secondaires au Mali : les communes méridionales de Sikasso, Koutiala et Bougouni". Paris 10, 1990. http://www.theses.fr/1990PA100116.

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La recherche porte d'une part sur le rôle des villes secondaires dans le développement territorial d'un pays africain pauvre, d'autre part sur la question foncière qui confronte des logiques institutionnelles nationales et des pratiques citadines locales. La première partie analyse les déformations en chaine des règles domaniales normatives : de l'état aux communes méridionales, la faiblesse des moyens budgétaires apparait à chaque niveau de production des lotissements résidentiels. La seconde partie décrit les marchés fonciers. Les sélections des offres en terrains urbains soulignent les stratifications sociales des villes. Les valorisations marchandes et immobilières de ces lots montrent d'étroites relations entre les rentes spéculatives et les ambitions patrimoniales du marché foncier. La troisième partie confronte ces différentes pressions au travers de filières professionnelles et migratoires d'insertion citadine. La famille et la durée de résidence déterminent des solvabilités sociales qui contournent ou consolident les solvabilités économiques. La quatrième partie envisage les implications historiques des conflits citadins autour de la terre. De nouvelles relations clientélistes s'établissent entre les communes locales et l'état. La conclusion nuance l'effet de taille des agglomérations urbaines dans la promotion résidentielle. Dans une comparaison géographique plus large, les liens entre rentes et patrimoines demandent de nouvelles recherches sur les concurrences économiques, sociales et politiques qui se déploient dans la société malienne
The investigations deal with the part of secondary towns in the territorial development of a west-African underdeveloped country on the one hand, and with the land question which confronts national institutional logics and local urban practices on the other hand. The first part analyses the deformations of normative domanial regulations : from the state to the southern communes, poor budgetary means are appearing at every levels of production of urban plots. The second part concerns the land markets. The selective offer of urban plots underlines the social stratifications in town. Market and property valorizations of these plots show close relations between speculative rents and patrimonial pressures on the land market. The third part confronts these different ambitions through occupational and migratory ways of town insertion. The family and the duration of residence determine social solvencies which bypass or consolidate economic solvencies. The fourth part considers historical implications of urban conflicts about land. New personal relationships develop between local communes and the state of Mali. The conclusion qualifies sizing effects between towns in the land and property market. Taken in a largest geographical comparison, the links between rents and patrimonies request new investigations about economic, social and political competitions which are spreading in Malian society
2

Chappatte, Andre. "Walking an earthly path : everyday Islam in Bougouni, a town of southwest Mali". Thesis, SOAS, University of London, 2013. http://eprints.soas.ac.uk/15627/.

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Sanogo, Séko. "Pegmatites lithinifères (Li-Cs-Ta) et roches plutoniques de Bougouni (Sud du Mali, Craton Ouest Africain) : approches pétrographiques, structurales, géochimiques et géochronologiques". Electronic Thesis or Diss., Université de Lille (2022-....), 2022. https://pepite-depot.univ-lille.fr/ToutIDP/EDSMRE/2022/2022ULILR083.pdf.

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La région de Bougouni a pour spécificité la présence de pegmatites et d'aplites porteuses de lithium. Le lithium est actuellement un élément stratégique au regard des besoins croissants en cette matière première. Les pegmatites lithinifères font ainsi partie des gisements les plus recherchés pour le lithium.La zone d'étude, située au SE de Bamako (Mali), appartient à la partie sud du craton ouest africain. Les différentes roches de cette zone se sont formées au cours des événements de croissance crustale du Birimien, lors de l'orogenèse éburnéenne, entre ca. 2200 et 1800 Ma. Les formations rencontrées sont des roches métavolcanosédimentaires et plutoniques majoritairement de nature granitoïdique (tonalite à monzogranite à deux micas), structurées dans une direction NNE-SSW par l'existence de grandes zones de cisaillement. Les dykes sont intrusifs dans ces roches encaissantes sous forme de filons d'épaisseur décimétrique à décamétrique depuis des faciès aplitiques à des faciès pegmatitiques. La mise ne place dans un domaine cassant couplé au bas grade métamorphique des métasédiments encaissants indiquent une mise en place des dykes au niveau de la croûte continentale supérieure.La province de Bougouni compte une centaine de dykes riches en lithium (Li2O > 1.00 wt% de la roche totale). Le spodumène, principal phase minérale porteuse de lithium (Li2O = 8 wt%), représente entre 5 et 30 vol.% de la roche, accompagné de feldspath alcalin, plagioclase, quartz et d'une faible quantité de muscovite et de biotite. Sont également présents une centaine de dykes pauvres en lithium (Li2O < 0.05 wt%) caractérisés par le même assemblage minéralogique que les dykes riches en lithium à l'exception du spodumène remplacé par le grenat.Concernant la géochronologie, les âges U-Pb sur zircons pour l'ensemble des granitoïdes (faciès granodioritiques à granitiques à deux micas) s'étendent entre 2100 ± 14 et 2136 ± 19 Ma. Ces âges sont en accord avec les âges d'autres formations plutoniques s'étalant entre 2080 et 2120 Ma à l'échelle du Birimien. Les âges U-Pb sur apatites magmatiques des dykes sont compris entre 2070 - 2000 Ma. La comparaison des données géochronologique à d'autres pegmatites du Birimien permettent de définir la période ca. 2070 - 2000 Ma comme la période de mise en place des dykes pegmatitiques (notamment les pegmatites de la famille LCT) du Birimien. Cette période tardi- à post orogénique représenterait l'étape finale du magmatisme paléoprotérozoïque dans le domaine du Baoulé-Mossi.Concernant la géochimie en éléments majeurs et traces, l'absence d'une évolution géochimique continue depuis les granitoïdes aux dykes ne permettent pas d'expliquer les liquides pegmatitiques comme étant les termes les plus évolués des granitoïdes. Cette conclusion est en accord avec les données géochronologiques qui témoignent d'une différence d'âge beaucoup trop importantes entre ces formations pour qu'elles puissent avoir un lien génétique. Concernant les dykes, bien qu'ils soient contemporains, les différences en termes de signature géochimique ne permettent pas d'expliquer qu'ils puissent avoir évolués depuis un seul et même liquide parent. Cependant, il est fort probable que les liquides à l'origine des deux types de dykes puissent provenir de la fusion du même type de protolithe de nature métapélitique.En somme, les données de terrain, pétrographiques, géochronologiques et géochimiques ne donnent pas de lien génétique entre les dykes et les granitoïdes de Bougouni. Les deux faciès de dykes sont formés à partir de deux liquides distincts issus d'un seul et même protolithe. La différence de composition minéralogique et géochimique, notamment en Li, entre les dykes riches en lithium et ceux pauvres en lithium pourrait être expliquée par le rôle de fluides d'origine sédimentaire ayant pu percoler et interagir avec les roches mères et/ou les liquides pegmatitiques permettant d'enrichir certains liquides en éléments mobiles, tel que le lithium
The Bougouni region in southern Mali is well known for the ore body lithium-bearing pegmatites and aplites. Lithium is currently a strategic element in view of the growing need for this raw material. The lithiniferous pegmatites are thus among the most sought-after deposits for lithium.The study area, located SE of Bamako (Mali), belongs to the southern part of the West African Craton. The various rocks in this area were formed during the Birimian crustal growth events, during the Eburnean oOrogeny, between ca. 2200 and 1800 Ma. The formations encountered are metavolcano sedimentary and plutonic rocks, mostly granitoid (tonalite to two-mica monzogranite), structured in a NNE-SSW direction by the existence of large shear zones. The dykes are intrusive in these host rocks, which occur in the form of decimeter to decameter thick dykes ranging from aplitic to pegmatitic facies. The emplacement in a brittle domain coupled with the low metamorphic grade of the enclosing metasediments indicate a dyke emplacement in the upper continental crust.The Bougouni province has about 100 Li-rich dykes (Li2O > 1.00 wt% of total rock). Spodumene, the main lithium-bearing mineral phase (Li2O = 8 wt%), represents between 5 and 30 vol.% of the rock, accompanied by alkali feldspar, plagioclase, quartz and a small quantity of muscovite and biotite. In addition to, 100 Li-poor dykes (Li2O < 0.05 wt%) that are characterized by the same mineralogical assemblage as the lithium-rich dykes except for spodumene, which is replaced by garnet.Concerning geochronology, U-Pb ages on zircons for all granitoids (granodioritic to granitic facies with two micas) range between 2100 ± 14 and 2136 ± 19 Ma. These ages are in agreement with the ages of other plutonic formations ranging between 2080 and 2120 Ma on the Birimian scale. The U-Pb ages on magmatic apatites of the dykes are between 2070 - 2000 Ma. Comparison of the geochronological data with other pegmatites of the Birimian allow us to define the period ca. 2070 - 2000 Ma as the period of establishment of the pegmatitic dykes (notably the LCT family pegmatites) of the Birimian. This late- to post-Orogenic period would represent the final stage of paleoproterozoic magmatism in the Boulé-Mossi domain.Concerning major and trace elements geochemistry, the absence of a continuous geochemical evolution from granitoids to dykes does not allow to explain the pegmatitic fluids as the most evolved terms of the granitoids. This conclusion is in agreement with the geochronological data that show a much too large age difference between these formations to be genetically related. Concerning the dykes, although they are contemporaneous, the differences in geochemical signature do not allow to explain that they could have evolved from a single parent melt. However, it is very likely that the melts that gave rise to both types of dykes may have been derived from the melting of the same type of metapelitic protolith.In sum, the field, petrographic, geochronological and geochemical data do not provide a genetic link between the Bougouni dykes and granitoids. The two dyke facies are formed from two distinct melts derived from a single protolith. The difference in mineralogical and geochemical composition, particularly in Li, between the Li-rich and Li-poor dykes could be explained by the role of fluids of sedimentary origin that may have percolated and interacted with the source? host rocks and/or the pegmatitic melts, allowing the enrichment of certain fluids in mobile elements such as lithium

Livros sobre o assunto "Bougouni (Mali)":

1

Togola, Dasse. Les organizations d'auto-promotion féminine et le développement de la filière fonio dans la zone de Bougouni au Mali. Arlington, VA: Winrock International, 2002.

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Capítulos de livros sobre o assunto "Bougouni (Mali)":

1

"Prologue". In Knowing by Ear, 1–9. Duke University Press, 2024. http://dx.doi.org/10.1215/9781478059028-001.

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The prologue connects the histories of temporary migration of African soldiers to Europe during World War I with the migration from Africa to Europe in the present. It discusses the absence of memories and records of the earlier migration in European historiographies. It then examines the history and nature of the Lautarchiv (sound archive) at Humboldt University in Berlin, where recordings of African soldiers and civilians, made in the early twentieth century, are held, and suggests that we understand the speakers on the recordings as the makers of the Lautarchiv. In Fragment I, Samba Diallo, a soldier from Bougounie in French Sudan (now Mali), sings in Bamanakan of the war as “the catcher of the living.”

Trabalhos de conferências sobre o assunto "Bougouni (Mali)":

1

Pujol, Magali, e Anne Battani. "Natural hydrogen occurrence in Bougou-1 well (Mali): geological accumulation or ongoing generation, insights from stable isotopes and noble gas tracing". In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.11436.

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Zhao, Hongwen, Ernest A. Jones, Rajput Seemant Singh, Hasnol Hady B. Ismail e Seng WahTan. "The Hydrogen System in the Subsurface: Implications for Natural Hydrogen Exploration". In ADIPEC. SPE, 2023. http://dx.doi.org/10.2118/216710-ms.

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Abstract In the context of global efforts to achieve carbon neutrality, Hydrogen (H2) has emerged as a key solution for reducing greenhouse gases emission. However, current methods of hydrogen production, such as thermochemical and electrochemical processes like electrolysis, methane reforming and pyrolysis, are generally expensive and suffer from issues including intensive carbon dioxide emission and high electricity consumption etc. (Ishaq et al. 2022; Younas et al. 2022). In fact, hydrogen gas can naturally occur in the subsurface which has been manifested by numerous hydrogen seepages found across the world (cf. Zgonnik 2020 and the references therein). Notably, a significant discovery of natural hydrogen was made accidently during drilling a water well (Bougou-1) in Mali in 1987. Subsequent exploration in the vicinity of Bougou-1 confirmed the existence of an active hydrogen system in the area (Prinzhofer et al. 2018), highlighting the possibility of commercial hydrogen accumulation in the subsurface. Moreover, there is a growing consensus that natural hydrogen could be an important alternative for hydrogen production (Zgonnik 2020). In recent years, extensive exploration activities and scientific research focusing on natural hydrogen occurrences, generation mechanisms, and accumulation processes have been conducted, particularly, in Africa (Moretti et al. 2022; Prinzhofer et al. 2018), Australia (Boreham et al. 2021; Frery et al. 2021; Leila eta al. 2022; Rezaee, 2021), Europe (Combaudon et al. 2022; Larin et al. 2015; Lefeuvre et al. 2022; Leila et al. 2021), Brazil (Moretti et al. 2021; Prinzhofer et al. 2019), and the USA (Guélard et al. 2017; Zgonnik et al. 2015). Geological investigations indicate that natural hydrogen is dominantly found on Precambrian cratons, ophiolite belts and mid-oceanic ridges (Rigollet and Prinzhofer, 2022). It occurs as gas leakages on the surface or is associated with other gases in the conventional and unconventional gas plays (Milkov 2022).
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Fuad, M. I. Ahmad, H. Zhao, M. S. Jaya e E. A. J. Jones. "Rock Physics Modeling of Hydrogen-Bearing Sandstone: Implications for Natural Hydrogen Exploration and Storage". In SPE Annual Technical Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/214789-ms.

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Resumo:
In the context of global carbon neutrality, using hydrogen as an energy source is becoming one of the key solutions to reduce greenhouse gas emissions. At present, hydrogen is mainly generated through a variety of thermochemical and electrochemical processes such as electrolysis, methane reforming and pyrolysis (Ishaq et al., 2022). However, these methods are generally expensive and suffer from serious issues such as intensive carbon dioxide emission and high electricity consumption (Younas et al., 2022). In fact, hydrogen gas can naturally occur in the subsurface, as evidenced by numerous hydrogen seepages found worldwide (cf. Zgonnik 2020 and the references therein). Furthermore, a significant amount of natural hydrogen was accidentally found during the drilling of a water well (Bougou-1) in Mali in 1987. The latest exploration in the vicinity of the Bougou-1 has indicated that an active hydrogen system exists in the area (Prinzhofer et al., 2018). A variety of scientific research and exploration activities have been conducted across the world to understand the occurrences, generation, and accumulation mechanisms of natural hydrogen (Tian et al., 2022). Natural hydrogen exploration is on the verge of becoming a full-fledged business, resembling hydrocarbon exploration that we are familiar with. Seismic is one of the most crucial geophysical data that is widely used to acquire a structural and stratigraphical description of the earth's subsurface and to understand complex geologic features. In addition to structural interpretation, seismic data is often used for reservoir characterization by quantitatively extracting both rock and fluid properties from the data through the solution of an inverse problem (Dvorkin et. Al., 2014). The discipline of rock physics plays an important role in seismic reservoir characterization by providing an accurate relationship between fluid and rock reservoir properties, elastic properties, and seismic responses. However, most seismic work is done for hydrocarbon exploration, and there are very few publications that demonstrate the utilization of geophysical seismic forward modeling and inversion for natural hydrogen exploration. Hydrogen accumulation in the subsurface relies on an effective "hydrogen system" in place, which shares some basic elements with a "hydrocarbon system," such as a reservoir and seal (Prinzhofer et al., 2018). Therefore, seismic exploration is assumed to be useful for hydrogen play detection and evaluation. One of the key aspects of natural hydrogen exploration is to understand the rock physical properties of hydrogen-bearing reservoir rocks in order to perform seismic-based reservoir characterization and potential hydrogen prospect evaluation. Currently, very few, if any, research works have been conducted regarding this topic. In comparison with hydrocarbon gases, hydrogen is characterized by ultra-light density and small molecular size. There is a significant knowledge gap in our routine rock physics analysis regarding how ultra-light gases like hydrogen affect the elastic properties of gas-bearing reservoir rocks. Questions such as whether it is possible to distinguish hydrogen gas with seismic data from other reservoir fluids (e.g., hydrocarbons, CO2, and brine) still need to be answered before conducting any seismic surveys targeting hydrogen plays.

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