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Journal articles on the topic 'Ouaddaï'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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1

Djerossem, Félix, Julien Berger, Olivier Vanderhaeghe, Moussa Isseini, Jérôme Ganne, and Armin Zeh. "Neoproterozoic magmatic evolution of the southern Ouaddaï Massif (Chad)." BSGF - Earth Sciences Bulletin 191 (2020): 34. http://dx.doi.org/10.1051/bsgf/2020032.

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This paper presents new petrological, geochemical, isotopic (Nd) and geochronological data on magmatic rocks from the poorly known southern Ouaddaï massif, located at the southern edge of the so-called Saharan metacraton. This area is made of greenschist to amphibolite facies metasediments intruded by large pre- to syn-tectonic batholiths of leucogranites and an association of monzonite, granodiorite and biotite granite forming a late tectonic high-K calc-alkaline suite. U-Pb zircon dating yields ages of 635 ± 3 Ma and 613 ± 8 Ma on a peraluminous biotite-leucogranite (containing numerous inhe
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2

Triaud, Jean-Louis. "Les « trous de mémoire » dans l'histoire africaine. La Sanûsiyya au Tchad : le cas du Ouaddaï." Revue française d'histoire d'outre-mer 83, no. 311 (1996): 5–23. http://dx.doi.org/10.3406/outre.1996.3427.

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3

Abdoulaye, B., A. B. Béchir, and P. M. Mapongmetsem. "Variabilité morphologique de Balanites aegyptiaca (L.) Del. dans la région du Ouaddaï au Tchad." International Journal of Biological and Chemical Sciences 10, no. 4 (2017): 1733. http://dx.doi.org/10.4314/ijbcs.v10i4.23.

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4

Chahad, Aouadalkarim Moussa, Serge Michalet, Ali B. Bechir, Abdelsalam Tidjani, Bernard A. Nkongmeneck, and Marie-Geneviève Dijoux-Franca. "Medicinal Plants from the Ouaddaï Province (Chad): An Ethnobotanical Survey of Plants Used in Traditional Medicine." Journal of Alternative and Complementary Medicine 21, no. 9 (2015): 569–77. http://dx.doi.org/10.1089/acm.2014.0243.

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5

de Wit, M. J., S. Bowring, R. Buchwaldt, et al. "Geochemical reconnaissance of the Guéra and Ouaddaï Massifs in Chad: evolution of Proterozoic crust in the Central Sahara Shield." South African Journal of Geology 124, no. 2 (2021): 353–82. http://dx.doi.org/10.25131/sajg.124.0048.

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Abstract In 1964, W.Q. Kennedy suggested that the crust of Saharan Africa is different from the rest of Africa. To date, the geologic evolution of this region remains obscure because the age and composition of crystalline basement are unknown across large sectors of the Sahara. Most of Africa comprises Archaean cratons surrounded by Palaeo- to Mesoproterozoic orogenic belts, which together constitute Africa’s three major shields (the Southern, Central and West African Shields), finally assembled along belts of Pan-African rocks. By contrast, central Saharan Africa (5.3x106 km2), an area just o
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6

Shellnutt, J. G. "The enigmatic continental crust of North-Central Africa: Saharan Metacraton or Central Sahara Shield?" South African Journal of Geology 124, no. 2 (2021): 383–90. http://dx.doi.org/10.25131/sajg.124.0047.

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Abstract The continental crust of North-Central Africa between the Tuareg and Arabian-Nubian shields and south to the Central African Orogenic Belt is enigmatic due to the few bedrock exposures especially within the central region. The current understanding, based on a review of geochronology and isotope geochemistry, is that the central Sahara region is a large, coherent craton that was ‘highly remobilized’ during the Late Neoproterozoic amalgamation of Gondwana and referred to as the Saharan Metacraton. However, new data from the Guéra, Ouaddaï, and Mayo Kebbi massifs and the Lake Fitri inli
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7

Adey, Souleymane Adam, Abdenbi Zine El-Abidine, Mahamat Ali Mustapha, et al. "Analyse de l'évolution des formations végétales forestières et préforestières du Sahel : cas des régions du Ouaddaï et du Wadi-Fira au Tchad." Physio-Géo, Volume 12 (February 27, 2018): 79–103. http://dx.doi.org/10.4000/physio-geo.5882.

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8

Abdoulaye, Brahim, Ali Brahim Bechir, and Pierre Marie Mapongmetsem. "Utilités socioéconomiques et culturelles du Balanites aegyptiaca (L.) Del. (Famille Zygophyllaceae) chez les populations locales de la Région du Ouaddaï au Tchad." Journal of Applied Biosciences 111, no. 1 (2017): 10854. http://dx.doi.org/10.4314/jab.v111i1.2.

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9

Djerossem, Felix, Armin Zeh, Moussa Isseini, Olivier Vanderhaeghe, Julien Berger, and Jérôme Ganne. "U-Pb-Hf isotopic systematics of zircons from granites and metasediments of southern Ouaddaï (Chad), implications for crustal evolution and provenance in the Central Africa Orogenic Belt." Precambrian Research 361 (August 2021): 106233. http://dx.doi.org/10.1016/j.precamres.2021.106233.

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10

Delafosse, Arnaud, Flavie Goutard, and Emmanuel Thebaud. "Epidémiologie de la tuberculose et de la brucellose des bovins en zone périurbaine d'Abéché (Tchad)." Revue d’élevage et de médecine vétérinaire des pays tropicaux 55, no. 1 (2002): 5. http://dx.doi.org/10.19182/remvt.9846.

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Cette étude a eu pour objectif de préciser l’épidémiologie de la tuberculose et de la brucellose des bovins dans le bassin laitier d’Abéché (préfecture du Ouaddaï, Tchad oriental). La population étudiée a été constituée d’animaux de plus d’un an pour la tuberculose et de femelles de plus d’un an pour la brucellose. L’échantillon a été sélectionné à l’aide d’un sondage à deux degrés (village puis éleveur). Le diagnostic a été réalisé par intradermotuberculination (simple puis comparative) pour la tuberculose et par une analyse sérologique [épreuve à l’antigène tamponné (EAT), puis fixation du c
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11

Nguimalet, Cyriaque-Rufin, and Sylvain Ndjendole. "Les extrêmes hydrologiques: des indicateurs d'hydrodynamisme ou d'hydraulicité du plateau gréseux de Mouka-Ouadda sur la rivière Pipi à Ouadda (République Centrafricaine)." Zeitschrift für Geomorphologie 52, no. 1 (2008): 125–41. http://dx.doi.org/10.1127/0372-8854/2008/0052-0125.

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12

Bazzi, Illyass, Khadija El Mouaden, Aicha Chaouay, et al. "Monitoring heavy metal contamination levels and microbiological pollution in seawater of Agadir coastal zones." Indonesian Journal of Science and Technology 5, no. 3 (2020): 463–69. http://dx.doi.org/10.17509/ijost.v5i3.26208.

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The objective of this study was to monitor the bacteriological contamination of the seawater of the marine fisheries of the coastal Agadir, Morocco. The study was focused on the diagnosis on the pollution in heavy metals, such as cadmium, lead, and mercury in five zones: the port of Imi Ouaddar fish boarding (zone Z1), the old port of Agadir (zones Z2 and Z3), the port of Agadir Marina (zone Z4), and the estuary of Oued Souss (zone Z5). The analyses were done by testing physicochemical parameters (such as pH, temperature, dissolved oxygen, salinity and conductivity) as well as microbiological
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13

Chahad, Aouadalkarim Moussa, Souleymane Adam Adey, Adawaye Chatté, Zapfack Louis, and Marie-Geneviève Dijoux-Franca. "Chemical analysis and Biological properties of Terminalia macroptera Guill. & Perr. from Eastern Chad." Mediterranean Journal of Chemistry 11, no. 1 (2021): 104. http://dx.doi.org/10.13171/mjc02102121561saa.

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Based on a previous ethnobotanical survey, <em>Terminalia macroptera</em> Guill. & Perr. was selected as its heartwood is traditionally used for infections treatment and as mosquito repellent in the province of Ouaddai (Chad). In our course for a better knowledge of this medicinal plant which could be developed as phytomedicine, it is of great interest to subsequently characterize the chemical profile and bioactivities of this plant. In the present study we develop an Ultrahigh-performance liquid chromatography with diode array detection coupled to electrospray ionization a
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14

Doutoum, Abdesalam Adoum, Arnaud Delafosse, P. Elsen, and S. Amsler Delafosse. "Vecteurs potentiels de Trypanosoma evansi chez le dromadaire au Tchad oriental." Revue d’élevage et de médecine vétérinaire des pays tropicaux 55, no. 1 (2002): 21. http://dx.doi.org/10.19182/remvt.9841.

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Le Tchad oriental est une région d’élevage du dromadaire. La trypanosomose à Trypanosoma evansi (ou surra), maladie transmise mécaniquement par divers insectes hématophages, y est répandue et touche en priorité les cheptels transhumants. Une enquête entomologique a été réalisée dans sept sites représentatifs afin de préciser l’épidémiologie de la maladie dans cette zone. Quatre sites (Koukou Angarana et Djogori au Sud, Oum Chalouba et ouaddi Fira au Nord) ont été associés à une forte prévalence de la maladie et les trois autres (Abdi au Sud, Am sak et ouaddi Fama au Nord) à une faible prévalen
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15

Bendjelid, Abed. "Population et SociétésBulletin d’information de l’INEDn° 359, juillet-août 2000Maghreb : la chute irrésistible de la fécondité par B.H. Ouadah et J. Vallin." Insaniyat / إنسانيات, no. 11 (August 31, 2000): 158–59. http://dx.doi.org/10.4000/insaniyat.8022.

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16

Oursingbé, Massing, Zhonghua Tang, and Yonoudjoum M. Médard. "Methods and Problems of Drilling Implantation in Rural Water Supply in the Fractured Basement Area in Chad: Case of Ouaddaï Geographic." Modern Applied Science 4, no. 7 (2010). http://dx.doi.org/10.5539/mas.v4n7p9.

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