Relevant bibliographies by topics / Chott el- (Tunisie)

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Academic literature on the topic 'Chott el- (Tunisie)'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "Chott el- (Tunisie)"

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Raddadi, Afef, Yann Callot, and Pascal Podwojewski. "Un géopatrimoine en péril : les tertres du Nefzaoua dans le sud tunisien." Géo-Regards 14, no. 1 (2021): 95–118. http://dx.doi.org/10.33055/georegards.2021.014.01.95.

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Les paysages des tertres oasiens du Nefzaoua sont disposés à l’est du Chott el Jerid en Tunisie aride. Les palmeraies s’étalent au pied des tertres, monticules de forme conique creusés au centre par une source artésienne d’eau douce. Ils ont été aménagés et ont été à la base du développement des oasis. Aujourd’hui, les sources sont taries par la prolifération des forages et les tertres, fruits d’une conjonction de conditions géomorphologiques, hydrogéologiques et climatiques sont à l’abandon, voire détruits pour étendre les plantations de palmiers dattiers. Ces édifices peuvent être considérés à la fois comme un géopatrimoine et un patrimoine culturel en péril et certains mériteraient d’être préservés.
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Lahdhiri, A., and M. Mekki. "Caractérisation des itinéraires techniques de la culture de courgette au périmètre public irrigué de chott meriem-Tunisie." African Crop Science Journal 24, no. 4 (December 2, 2016): 349. http://dx.doi.org/10.4314/acsj.v24i4.2.

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Latrech, Basma, Hiba Ghazouani, Lasram Asma, Boutheina M. Douh, Mansour Mohsen, and Abdelhamid Boujelben. "Long-term trend analysis of climatic variables and reference evapotranspiration over different urban areas in Tunisia." Brazilian Journal of Biological Sciences 6, no. 12 (2019): 189–201. http://dx.doi.org/10.21472/bjbs.061218.

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In this study, the trend analysis of annual climatic variables including Tmax, Tmin, Tmean, RHmean, WS and SR as well as FAO-56 PM ET0 were investigated in three locations in Tunisia during 1984-2007. The Mann-Kendall Test, the Sen's Slope Estimator and linear regression tests were used for the analysis. The obtained results showed a significant increasing trends (a < 0.001) and (a < 0.01) in annual Tmax, Tmin and Tmean at all the considered locations. However, Tmin increase faster than Tmax with a slope of magnitudes ranging between 0.057 to 0.1 oC year-1. For RHmean, a non-significant tendency of decrease was observed in Chott-Mariem station. However, significantly increasing trends were found for Kelibia and Tunis Carthage. Concerning the WS variable, a tendency of decrease is observed during the study period for all the stations. Nevertheless, the statistical analysis of decreasing tendency of wind speed varied from non-significant for Tunis Carthage to highly significant (a <= 0.001) at Chott-Mariem and Kelibia. Despite the highly significant upward trend of temperature, the temporal pattern of mean annual FAO56 PM-ET0, over the different stations, did not exhibit any significant trend except for Kelibia station.
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Bedoui, Sana, Elhoucine Essefi, Houda Besser, Ali Benour, Yosra Ayadi, Faten Khelifi, and Younes Hamed. "Geochemical, Mineralogical and Isotopic Fracturing during the Progressive Evaporation of Chott Djerid Brine (Southern Tunisia)." International Journal of Engineering Research in Africa 58 (January 11, 2022): 107–25. http://dx.doi.org/10.4028/www.scientific.net/jera.58.107.

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Djerid Chott, in southwestern Tunisia, is one of the biggest salt lakes in the world. This work follows the specific precipitation of evaporites through progressive evaporation of Chott Djerid brines using geochemical, isotopic and mineralogical approaches, to explain the intricacy of the working of saline frameworks controlled basically by climatic driving and the underlying geochemical structure acquired from the geographical system. Toward the finish of every evaporation step, solid and liquid samples went through analyses. Djerid brine is remarkably saline (427.7 g/l) and it is supersaturated contrasted with halite. The outcomes indicated that the Chott Djerid brines shaped fundamentally Cl--Na+-SO4- type geochemistry. Added to halite and gypsum as significant minerals, other minor minerals including carnallite, hexahydrite and sylvite were recognized in various phases of progressive evaporation of Djerid brine. Regardless of their low costs, significant minerals are of geo-economic interest because of their high amounts of production. Then, minor valuable minerals secure their geo-economic interest from their excessive costs. In this work, we find the window of precipitation of these valuable minerals' at the evaporation paces of 80% and 100%.
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Rhouma, Abdelhak, Mohammad Imad Khrieba, Yehya A. Salih, Hamza Rhouma, and Hanane Bedjaoui. "Efficacy of fungicides for control of powdery mildew on grapevines in Chott Sidi Abdel Salam oasis, southeastern Tunisia." JOURNAL OF OASIS AGRICULTURE AND SUSTAINABLE DEVELOPMENT 3, no. 2 (December 1, 2021): 1–7. http://dx.doi.org/10.56027/joasd.072021.

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Grapevine is an important fruit crop grown in the Chott Sidi Abdel Salam oasis in south eastern Tunisia. It provides great economic potential for the oasis population due to its higher yield and monetary returns. It, also, has a good nutritional value and is consumed fresh or in dried form. Powdery mildew represents one of the most destructive diseases affecting viticulture, especially in temperate-humid climate. It is an economically important fungal disease in the grapevine farms. This pathogen is able to differentially attack leaves and grapes, and is currently controlled with repeated applications of fungicides. This research aimed to use chemical control in order to assess the ability of contact, systemic and the combination of both routes of fungicides’ administration, at three different sampling moments to manage powdery mildew infestation of grapevines (Cv. Bazzoul Kalba), under field conditions. The experiments were conducted in the oasis of Chott Sidi Abdel Salam in southeastern Tunisia. Both Pristine WG and Vectra 10 SC allowed controlling the disease intensity of powdery mildew compared to Talendo® showing a highly significant augmentation of the inhibitory growth potential (84.26% and 88.94%, respectively at 21 days after the first fungicide application) and the protective potential (73.11% and 76.92%, respectively at 21 day). This information can be used to help grapevines growers to improve powdery mildew control and enhance marketable yields.
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Kbir-Ariguib, Najia, Dalila Ben Hassan Chehimi, and Lotfi Zayani. "Treatment of Tunisian salt lakes using solubility phase diagrams." Pure and Applied Chemistry 73, no. 5 (May 1, 2001): 761–70. http://dx.doi.org/10.1351/pac200173050761.

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The Tunisian salt lakes are considered as an important materials resource useful for industry and agriculture. They are called sebkhat or chott, and they cover a large part of Tunisian land. Their brines correspond to the quinary system: Na+, K+, Mg2+ / Cl­, SO42­­H2O. In the first part of this paper, a short description and abstracted geochemical and economical data about some Tunisian salt lakes are given. In the second part, the fitting equations used for modeling the quinary system are established and applied to the subsystems NaCl­KCl­H2O, NaCl­MgCl2­H2O, KCl­MgCl2­H2O, and to NaCl­Na2SO4­H2 O, KCl­K2SO4­H2 O, Na2SO4­K2SO 4­H2O. The coherence between the calculated and the experimental diagrams is discussed.
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Abdallah, Manel Ben, Fatma Karray, Najla Mhiri, Nan Mei, Marianne Quéméneur, Jean-Luc Cayol, Gaël Erauso, Jean-Luc Tholozan, Didier Alazard, and Sami Sayadi. "Prokaryotic diversity in a Tunisian hypersaline lake, Chott El Jerid." Extremophiles 20, no. 2 (January 2, 2016): 125–38. http://dx.doi.org/10.1007/s00792-015-0805-7.

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Kraiem, Zohra, Kamel Zouari, Najiba Chkir, and Aissa Agoune. "Geochemical characteristics of arid shallow aquifers in Chott Djerid, south-western Tunisia." Journal of Hydro-environment Research 8, no. 4 (December 2014): 460–73. http://dx.doi.org/10.1016/j.jher.2013.06.002.

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Najjari, Afef, Panagiota Stathopoulou, Khaled Elmnasri, Faten Hasnaoui, Ines Zidi, Haitham Sghaier, Hadda Imene Ouzari, Ameur Cherif, and George Tsiamis. "Assessment of 16S rRNA Gene-Based Phylogenetic Diversity of Archaeal Communities in Halite-Crystal Salts Processed from Natural Saharan Saline Systems of Southern Tunisia." Biology 10, no. 5 (May 4, 2021): 397. http://dx.doi.org/10.3390/biology10050397.

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A thorough assessment of the phylogenetic diversity and community structure of halophilic archaea from three halite-crystal salts, processed from two separated saline systems of Southern Tunisia has been performed using culture dependent and independent methods targeting different regions of 16S rRNA gene sequences including DGGE, 16S rRNA clone libraries and Illumina Miseq sequencing. Two samples, CDR (red halite-crystal salts) and CDW (white halite-crystal salts), were collected from Chott-Eljerid and one sample CDZ (white halite-crystal salts) from Chott Douz. Fourteen isolates were identified as Halorubrum, Haloferax, Haloarcula, and Halogeometricum genera members. Culture-independent approach revealed a high diversity of archaeal members present in all samples, represented by the Euryarchaeal phylum and the dominance of the Halobacteria class. Nanohaloarchaea were also identified only in white halite samples based on metagenomic analysis. In fact, a total of 61 genera were identified with members of the Halorhabdus, Halonotius, Halorubrum, Haloarcula, and unclassified. Halobacteriaceae were shared among all samples. Unexpected diversity profiles between samples was observed where the red halite crust sample was considered as the most diverse one. The highest diversity was observed with Miseq approach, nevertheless, some genera were detected only with 16S rRNA clone libraries and cultured approaches.
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Attia-Essaies, S., L. Zayani, D. Ben Hassen Chehimi, R. Cohen Adad, N. Kbir Ariguib, and M. Trabelsi-Ayadi. "Simulation of crystallization sequence during the evaporation of Chott El Jerid brine (south Tunisia)." Thermochimica Acta 503-504 (May 2010): 8–11. http://dx.doi.org/10.1016/j.tca.2010.02.011.

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Dissertations / Theses on the topic "Chott el- (Tunisie)"

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Abbas, Khairat. "Suivi par télédétection multi-source du bassin endoréique du Chott El Djérid (Tunisie) entre 1985 et 2015." Thesis, Reims, 2016. http://www.theses.fr/2016REIMS008.

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La dépression du Chott El Djérid constitue l'un des bassins endoréiques salins les plus importants dans le monde. Au cours du stade d'inondation, le Chott est rempli par deux lacs temporaires localisés au centre du Chott et séparés par la digue-route P16, suite à des pluies abondantes et/ou la remontée de la nappe souterraine. Les variations spatiales du cycle inondation-assèchement sont marquées par une inondation et un assèchement plus rapide dans la partie au sud de la digue-route que celle au nord. Les variations temporelles sont illustrées par la comparaison de ce cycle entre les inondations de l’hiver 2009, du printemps 2007 et de juin 2014 au cours de la période sèche. Au cours de ce cycle entre avril et août 2007, les valeurs de réflectance ont varié de 2 à 37 % au sud de la digue-route et de 2 à 31 % au nord. Elles sont donc plus élevées et leur augmentation est en moyenne plus rapide au sud de la digue-route qu’au nord. Les processus évaporitiques du Chott sont contrôlés par les processus hydriques et éoliens. Après l'assèchement du lac, les croûtes évaporitiques du Chott comprennent un assemblage de minéraux dominé par la halite sur la marge méridionale de la digue-route et par le gypse au nord de celle-ci. Les croûtes gypseuses apparaissent dynamiques dans l'espace et le temps et sont distribuées plus largement que les croûtes de halite. Les données LSR (Landsat Surface Reflectance) ont fourni des indications sur la minéralogie des évaporites, même si elles sont à moyenne résolution spectrale. L’étude a apporté également des informations sur les autres unités de paysage telles que les aïoun, la bordure sableuse, etc
Chott El Jerid is one of the most important endorheic salt lake or playa lakes in the world. During the flooding stage, the Chott is mainly filled by two temporary lakes separated by the causeway P16, after high rainfalls and/or groundwater recharge. Spatial variations of flooding-desiccation cycle are illustrated by a faster flooding and drying on the southern edge of Chott than the northern. The temporal variation was illustrated by the comparison between the winter flood in 2009, the spring flood in 2007 and the flood of June 2014 (the only flood during the dry period). During this cycle between April and August 2007, the reflectance values varied from 2 to 37 % to the south of the causeway and from 2 to 31 % to the north. The reflectance values are higher and their increase was faster to the south of the causeway than to the north. The behaviour of precipitation, concentration and distribution of the evaporites on the Chott follows the behaviour of flooding and desiccation. After the final desiccation of the playa lake, the mineralogy of salt crusts comprised an assemblage dominated by halite to the south of the causeway and by gypsum to the north. Gypsum crusts appear highly dynamic in space and time, and they are more widely distributed than halite crusts. The LSR (Landsat Surface Reflectance) data provide information about the mineralogical nature of evaporites of the Chott, although LSR offers only a medium spectral resolution. The study also provided information on the other landscape-units such as aioun, the sandy border, etc
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Ben, Abdallah Manel. "Etude de la diversité microbienne (bactéries et archées) d'un environnement hypersalé tunisien, le Chott El Jerid : applications biotechnologiques." Electronic Thesis or Diss., Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4757.

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Le présent travail s’intéresse à l’étude de la diversité des communautés procaryotiques, basée sur le gène codant pour l’ARNr 16S et sur les gènes codants pour la sous-unité β du sulfite réductase dissimilatrice (dsrB) et la sous-unité alpha de la méthyl-coenzyme M réductase (mcrA), pour étudier la diversité de la communauté des bactéries sulfato-réductrices et des méthanogènes, respectivement à partir des échantillons collectés en saison sèche ou pluvieuse du Chott El Jerid. Les analyses des séquences du gène codant pour l’ARNr 16S ont montré que les bactéries regroupées aux Proteobacteria et Firmicutes sont détectés dans les deux saisons alors que les séquences appartenant au groupe taxonomique Bacteroidetes, Actinobacteria et Betaproteobacteria sont apparues uniquement dans la saison pluvieuse. Le groupe Deinococcus-Thermus sont observés que dans la saison sèche. Dans le domaine des archées, la plupart des séquences appartiennent au phylum Euryachaeota, détecté dans les deux saisons, alors que, le phylum Crenarchaeota apparait uniquement dans la saison pluvieuse. En plus, les bactéries sulfato-réductrices, appartenant à la classe Deltaproteobacteria, sont fréquents notamment à la saison pluvieuse prouvée déjà par les deux techniques DGGE et qPCR. A partir des cultures d’enrichissement, de nombreuses bactéries anaérobies fermentaires appartiennent aux familles Halanaerobiaceae et Halobacteroidaceae. Les analyses phylogénétiques ainsi que les caractéristiques phénotypiques et physiologiques montrent une nouvelle souche Sporohalobacter salinus proche de l’espèce Sporohalobacter lortetii, seule espèce décrite à ce jour du genre Sporohalobacter
The present work concerns microbial biodiversity of prokaryotic communities, sulfate-reducing bacteria, and methanogens targeting the 16S rRNA gene and functional gene markers encoding the dissimilatory sulfite reductase β-subunit gene (dsrB) and alpha subunit of the methyl-coenzyme M reductase (mcrA), respectively from samples collected in the dry and wet seasons from Chott El Jerid. Phylogenetic analysis targeting the 16S rRNA gene showed that bacteria were grouped to Proteobacteria and Firmicutes detected at both seasons, whereas, Bacteroidetes, Actinobacteria and Betaproteobacteria were present only in the wet season. Deinococcus-Thermus group were observed in the dry season. Archaeal sequences were belonged to the phyla of Euryarchaeota in both seasons and Crenarchaeota was appeared in wet season. Sulfate-reducing bacteria, related to Deltaproteobacteria class were dominant mainly in wet season proved by two techniques DGGE and QPCR. From enrichment cultures, anaerobic fermentative bacteria were isolated in pure cultures, related to Halanaerobiaceae and Halobacteroidaceae families. Phylogenetic analysis, phenotypic and physiological characteristics showed a novel strain Sporohalobacter salinus related to Sporohalobacter lortetii, an unique species of genus Sporohalobacter described until now
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Ben, Abdallah Manel. "Etude de la diversité microbienne (bactéries et archées) d'un environnement hypersalé tunisien, le Chott El Jerid : applications biotechnologiques." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4757.

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Le présent travail s’intéresse à l’étude de la diversité des communautés procaryotiques, basée sur le gène codant pour l’ARNr 16S et sur les gènes codants pour la sous-unité β du sulfite réductase dissimilatrice (dsrB) et la sous-unité alpha de la méthyl-coenzyme M réductase (mcrA), pour étudier la diversité de la communauté des bactéries sulfato-réductrices et des méthanogènes, respectivement à partir des échantillons collectés en saison sèche ou pluvieuse du Chott El Jerid. Les analyses des séquences du gène codant pour l’ARNr 16S ont montré que les bactéries regroupées aux Proteobacteria et Firmicutes sont détectés dans les deux saisons alors que les séquences appartenant au groupe taxonomique Bacteroidetes, Actinobacteria et Betaproteobacteria sont apparues uniquement dans la saison pluvieuse. Le groupe Deinococcus-Thermus sont observés que dans la saison sèche. Dans le domaine des archées, la plupart des séquences appartiennent au phylum Euryachaeota, détecté dans les deux saisons, alors que, le phylum Crenarchaeota apparait uniquement dans la saison pluvieuse. En plus, les bactéries sulfato-réductrices, appartenant à la classe Deltaproteobacteria, sont fréquents notamment à la saison pluvieuse prouvée déjà par les deux techniques DGGE et qPCR. A partir des cultures d’enrichissement, de nombreuses bactéries anaérobies fermentaires appartiennent aux familles Halanaerobiaceae et Halobacteroidaceae. Les analyses phylogénétiques ainsi que les caractéristiques phénotypiques et physiologiques montrent une nouvelle souche Sporohalobacter salinus proche de l’espèce Sporohalobacter lortetii, seule espèce décrite à ce jour du genre Sporohalobacter
The present work concerns microbial biodiversity of prokaryotic communities, sulfate-reducing bacteria, and methanogens targeting the 16S rRNA gene and functional gene markers encoding the dissimilatory sulfite reductase β-subunit gene (dsrB) and alpha subunit of the methyl-coenzyme M reductase (mcrA), respectively from samples collected in the dry and wet seasons from Chott El Jerid. Phylogenetic analysis targeting the 16S rRNA gene showed that bacteria were grouped to Proteobacteria and Firmicutes detected at both seasons, whereas, Bacteroidetes, Actinobacteria and Betaproteobacteria were present only in the wet season. Deinococcus-Thermus group were observed in the dry season. Archaeal sequences were belonged to the phyla of Euryarchaeota in both seasons and Crenarchaeota was appeared in wet season. Sulfate-reducing bacteria, related to Deltaproteobacteria class were dominant mainly in wet season proved by two techniques DGGE and QPCR. From enrichment cultures, anaerobic fermentative bacteria were isolated in pure cultures, related to Halanaerobiaceae and Halobacteroidaceae families. Phylogenetic analysis, phenotypic and physiological characteristics showed a novel strain Sporohalobacter salinus related to Sporohalobacter lortetii, an unique species of genus Sporohalobacter described until now
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Abdallah, Hassen. "Le Crétacé supérieur de la chaine nord des Chotts (Sud tunisien) : biostratigraphie, sédimentologie, diagenèse." Dijon, 1987. http://www.theses.fr/1987DIJOS001.

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L'étude du Crétacé supérieur du pays du Jerid s'articule en trois volets : -les formations lithologiques : identification des milieux de sédimentation, variations latérales des faciès, calage stratigraphique et établissement d'une échelle biostratigraphique. -la dynamique sédimentaire : perturbations sédimentaires et diagénétiques en relation avec le jeu des failles Bir oum Ali, Chebika et Atra ; le comportement des rudistes, inocérames, orbitoides, bryozoaires ; l'évolution en deux étapes, du cadre paléogéographique : au Cénomanien, où dominent les sollicitations du substratum, des plate-formes laguno-littorales, sous influence saharienne, sont caractérisées par des groupes biologiques réduits et des minéraux argileux détritiques; au Sénonien, où prévalent les actions eustatiques, dans les plate-formes carbonatées sous influence téthysienne, abondent des groupes biologiques hiérarchisés et des smectites d'origine "océanique". La diagenèse subaérienne des surface durcies polyphasées, notamment l'émersion précoce et la lithification d'origine supratidale. L'étude de la dolomitisation de la formation Gattar a démontré que l'histoire diagénétique comportait trois phases : deux phases intra-turoniennes et une phase non datée. . .
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Hedi, Abdeljabbar. "Biodiversité des bactéries halophiles de Chotts et Sebkhas tunisiens et applications biotechnologiques." Aix-Marseille 1, 2009. http://theses.univ-amu.fr.lama.univ-amu.fr/2009AIX11034.pdf.

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Les bactéries halophiles (modérées et extrêmes) ont été isolées à partir de sites hypersalins tels que les lacs et les sols salés aussi bien que des lacs alcalins. La biodiversité taxonomique des microorganismes trouvés dans les environnements hypersalés, est liée essentiellement à la haute concentration en sel. Les microorganismes halophiles sont doués d’une activité métabolique et physiologique intervenant dans la fermentation d’aliments ainsi que dans la transformation et la dégradation des déchets et des polluants organiques des environnements salés. Les bactéries halophiles sont classées parmi les microorganismes modérés dont la concentration du milieu en NaCl se situe entre 0,5 M et 2,5 M alors que les bactéries extrêmophiles poussent dans des milieux où la salinité est supérieure à cette concentration. La diversité microbienne dans les écosystèmes hypersalins au nord et au sud de la Tunisie a été faiblement étudiée. Chott El-Djerid et Sebkhas Sehline, les deux grands lacs salés du pays représentent les sources les plus importantes du sel de cuisine. L’intêret économique de ces régions nous amène à une étude taxonomique des microorganismes qui occupent de tels écosystèmes. L’objectif de ce travail est d’examiner par des approches phénotypiques, physiologiques, biochimiques et moléculaires, les souches isolées à partir des deux environnements ainsi que d’étudier les caractéristiques de ces souches nouvelles. Les isolats étudiés sont repiqués sur milieu concentré en sel (25% NaCl). La caractérisation moléculaire a été effectuée et les résultats obtenus montrent que les isolats représentatifs de la collection sont des bactéries aérobies appartenant phylogénétiquement aux genres Salicola, Pontibacillus, Bacillus, Halomonas, Marinococcus, Yeomjeonicoccus, Gracilibacillus, Halovibrio, Pseudomonas et Halobacillus. Dans les conditions d’anaérobiose de Chott El-Djerid, une seule bactérie a été isolée. L’identification moléculaire de cette souche et la comparaison phylogénétique avec les plus proches, montrent que la souche 6SANG représente une nouvelle espèces d’un nouveau genre Halanaerobaculum tunisiense gen. Nov. , sp. Nov. Pour confirmer la biodiversité des espèces fongiques des sites hypersalés de Sebkha Sehline, une analyse moléculaire a été réalisée pour les neuf isolats grâce à un séquençage du gène ITS. Les résultats témoignent de la présence de quatre espèces différents et qui sont : Hypocrea lixii, Hypocrea koningii, Trichoderma longibrachiatum et Pichia guilliermondii
Hypersaline environments are found in a wide variety of aquatic and terrestrial ecosystems. Bacterial aerobic communities were recovered from sediments of the shallow salt lake of the hypersalins environments and their distribution with respect to salinity gradients was established. The north and south of Tunisia consists of numerous ecosystems including extreme environments in which the microbial diversity has not been studied. We isolated the bacterial and archaeal communities in the shallow salt lake (El-Djerid and Sebkhas) and their distribution with respect to different physico-chemical characteristics like salinity gradients was established. The characterization was performed by using phenotypic characters including morphological, physiological, biochemical, nutritional test and phylogenetic approaches. Due to the economic importance of salt obtained from this lake, a microbial survey has been conducted. Physico-chemical analysis showed that the salts contain sufficient ions and hardness to support extremely halophilic bacteria. The salt collected from the lake contained a microbial community well adapted to the specific physical and nutritional conditions of each site. The results of analyses were quite similar and demonstrated the phenotypic heterogeneity of the species in question. Extreme bacteria were recovered from sampling sites, which contained up to 250 g/l NaCl. Results of this study were discussed with regard to the ecological significance of these microorganisms in the breakdown of organic matter in hypersalins environments together with the potential use of them in the industry. The purpose of this research was to examine their phenotypic features and their physiological and biochemical characteristics with the aim to screen for metabolites of industrial interest produced by the novel halophilic isolates. A new halophilic anaerobe was isolated from the hypersaline surface sediments of El-Djerid Chott, Tunisia. The isolate, designated as strain 6SANG, grew at NaCl concentrations ranging from 14 to 30%. Based on phenotypic and phylogenetic characteristics, we propose that this bacterium be classified as a novel species of a novel genus, Halanaerobaculum
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Gharbi, Mohamed. "Relationship between the southern Atlas foreland and the eastern margin of Tunisia (Chotts-Gulf of Gabes) : tectono-sedimentary, fault kinematics and balanced cross section approaches." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4340/document.

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L'architecture structurale de l’avant-pays sud atlasique tunisien est caractérisée par un style tectonique mixte résultant de la réactivation de failles normales connectées avec le socle, de la mise en place de décollements dans la couverture sédimentaire ainsi que d’un diapirisme non négligeable. La géométrie et l’orientation des structures extensives préexistantes, issues du rifting Trias à Turonien, contrôlent la déformation de la couverture sédimentaire au cours des phases compressives d’âge fini-mésozoïque et cénozoïque. En effet, la marge tunisienne a enregistrée une longue période de rifting, de la fin du Permien-Trias jusqu’au Turonien. Une inversion tectonique s’est initiée probablement pendant le Crétacé supérieur. Les compressions tectoniques tertiaires se sont produites au cours de trois périodes: l’Eocène, le Mio-Pliocène et le Plio-Quaternaire. Notre étude montre une variation temporel du champ de contrainte régional, d’un régime tectonique compressif de direction NW-SE d’âge Mio-Pliocène à un régime tectonique compressif de direction N-S à NNE-SSW d’âge Quaternaire à l’actuel. Ce changement de régime tectonique a lieu, soit à la fin du Pliocène, soit au début du Quaternaire. Et une variation spatiale du champ de contrainte, de la compression (Domaine atlasique de la Tunisie) à la transtension (Golfe de Gabès), semble se faire progressivement du Nord vers le Sud-Est. Cette étude souligne le rôle prépondérant des failles profondes héritées et acquises au cours de l'évolution de la marge passive sud téthysienne. Dans ce domaine, la restauration de notre coupe équilibrée montre un raccourcissement modéré en surface de l’ordre de 8.1 km (~7,3%)
The structural architecture of the Tunisian foreland consists in a mixed tectonic style with deep-seated basement faults, shallower décollements within sedimentary cover and salt diapirism. Structural geometry and orientation of the pre-existing Triassic-Turonian extensional structures controlled subsequent contractional deformation within the sedimentary cover. The rifting of the margin started in the late Permian–Triassic and continued up to the Turonian. From the inversion of the successive compressions, the development of ENE-trending thrust-related anticlines such as the Orbata and Chemsi structures are controlled by the reactivation of the inherited Mesozoic faults. Geologic data from this region indicate that the positive tectonic inversion occurred probably during Late Cretaceous period. The Cenozoic tectonic compressions in the southern Atlassic domain occurred during three periods: Late Eocene, Late Miocene and Plio-Quaternary. The Fault kinematic analysis reveals a temporal change in states of stress that occurred during the Late Cenozoic. A paleostress (Miocene-Pliocene) state is characterized by a regional compressional tectonic regime with a mean N134±09°E trending compressional axis (σ1). A modern (Quaternary to present-day) state of stress also corresponds to compressional tectonic regime with a regionally mean N05±10°E trending horizontal σ1. This study underlines the predominant role of inherited basement structures acquired during the evolution of the southern Tethyan margin, and their influence on the geometry of the Atlassic fold-and-thrust belt. At the southern Atlas of Tunisia our restoration shows a surface shortening of ~8.1 km (~7.3%)
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Books on the topic "Chott el- (Tunisie)"

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Ouezdou, Hédi Ben. Discovering southern Tunisia: The chotts and around the oases. [Tunis: s.n.], 1999.

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Book chapters on the topic "Chott el- (Tunisie)"

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Pugno, Nicola M., Richard B. Cathcart, and Joseph J. Friedlander. "Treeing the CATS: Artificial Gulf Formation by the Chotts Algeria–Tunisia Scheme." In Macro-engineering Seawater in Unique Environments, 489–517. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14779-1_22.

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Abbas, Khairat, Jean-Paul Deroin, and Samir Bouaziz. "Multitemporal Remote Sensing for Monitoring Highly Dynamic Phenomena: Case of the Ephemeral Lakes in the Chott El Jerid, Tunisia." In Advances in Remote Sensing and Geo Informatics Applications, 101–3. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01440-7_24.

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Kraouia, Safa, Amina Mabrouk El Asmi, Abdelhamid Ben Salem, and Moncef Saidi. "Geopetroleum Evaluation of the Ordovician and Triassic Reservoirs in the Southern Part of Chotts Area (Southern Tunisia) and Maturity Modeling." In Advances in Petroleum Engineering and Petroleum Geochemistry, 153–56. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01578-7_36.

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Boukhalfa, Kamel, Mohamed Soussi, Walid Ben Ali, and Mohamed Ouaja. "Facies and Architecture of a Tide-Dominated Estuary in the Lower Cretaceous Sidi Aich Formation of the Chotts Basin, Southern Tunisia." In Advances in Science, Technology & Innovation, 139–43. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-72547-1_30.

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Gammoudi, Sana, Ines Dahmen-Ben Moussa, Neila Annabi-Trabelsi, Habib Ayadi, and Wassim Guermazi. "Antioxidant Properties of Metabolites from New Extremophiles Microalgal Strain (Southern, Tunisia)." In Antioxidants - Benefits, Sources, Mechanisms of Action. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96777.

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With the demand for bioproducts that can provide benefits for biotechnology sectors like pharmaceuticals, nutraceuticals, and cosmeceuticals, the exploration of microalgal products has turned toward extremophiles. This chapter is intended to provide an insight to most important molecules from halotolerant species, the cyanobacteria Phormidium versicolor NCC-466 and Dunaliella sp. CTM20028 isolated from Sfax Solar Saltern (Sfax) and Chott El-Djerid (Tozeur), Tunisia. These microalgae have been cultured in standard medium with a salinity of 80 PSU. The in vitro antioxidant activities demonstrated that extremolyte from Dunaliella and Phormidium as, phycocaynin, lipids, and polyphenol compound presents an important antioxidant potential.
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Bedoui, Sana, Elhoucine Essefi, and Younes Hamed. "Geochemistry and Sedimentology Study of a Core From Chott Geuttar." In Climatic and Environmental Significance of Wetlands, 117–38. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-9289-2.ch007.

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Endoreic saline systems in Tunisia such as that of Chott El Guettar recorded the climatic changes as well as the setting of millennial cycles. This study deals with high-resolution proxies (colors variability, geochemistry, magnetic susceptibility, and grain size distribution) to find the different cycles. Cycles should be attributed either to internal or external forcing. The output of this study demonstrates a sun-driven Holocene cyclostratigraphy of 1000yr that was previously discussed in the literature. Since color studies were confirmed by direct analyses, this method was used to carry a higher resolution. The solar periodicity clearly identified with a continuous cycle of around 2500 years and with two others of around 1000 and 1660 years only during the Early Holocene. This work confirmed the cycles found by colors study through the real analyses such as geochemical and magnetic measurement.
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Bedoui, Sana, Elhoucine Essefi, and Younes Hamed. "Comparative Thermodynamic Theoretical Modeling of Brines From Chott Djerid, Southeastern Tunisia and Sebkha Bazer, Northeast Algeria." In Advances in the Modelling of Thermodynamic Systems, 48–62. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8801-7.ch003.

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The thermodynamic theoretical modeling of brines from the Chott Djerid, Southeastern Tunisia and Sebkha Bazer, Northeast Algeria between the initial solution and evaporation of 100% shows different geochemical evolutions and variable precipitated mineral species. This is due to different initial geochemical compositions, which are basically related to different geological and climatic contexts. A rigorous thermodynamic model has been presented for determining the crystallization sequence during the different stages of the evaporation process. A geochemical software program (PHREEQC) was used. Based on the analyses, PHREEQC appears the precipitation of a sequence of minerals. These results are confirmed by the mineralogical analyses (XRD results). The gradual evaporation process of brine showed that thenardite, gypsum, halite, and huntite are the feasible salts that could be extracted. Halite is the most abundant mineral along with the evaporation experiment of the two sebkhas.
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Blum, M., G. Kocurek, C. Swezey, M. Deynoux, N. Lancaster, D. M. Price, and J. C. Pion. "Quaternary wadi, lacustrine, aeolian depositional cycles and sequences, Chott Rharsa basin, southern Tunisia." In Quaternary Deserts and Climatic Change, 539–52. CRC Press, 2020. http://dx.doi.org/10.1201/9781003077862-55.

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DRAKE, NICK A., ROBERT G. BRYANT, ANDREW C. MILLINGTON, and JOHN R. G. TOWNSHEND. "PLAYA SEDIMENTOLOGY AND GEOMORPHOLOGY: MIXTURE MODELLING APPLIED TO LANDSAT THEMATIC MAPPER DATA OF CHOTT EL DJERID, TUNISIA." In Sedimentology and Geochemistry of Modern and Ancient Saline Lakes, 125–31. SEPM (Society for Sedimentary Geology), 1994. http://dx.doi.org/10.2110/pec.94.50.0125.

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BRYANT, ROBERT G., NICK A. DRAKE, ANDREW C. MILLINGTON, and BRUCE W. SELLWOOD. "THE CHEMICAL EVOLUTION OF THE BRINES OF CHOTT EL DJERID, SOUTHERN TUNISIA, AFTER AN EXCEPTIONAL RAINFALL EVENT IN JANUARY 1990." In Sedimentology and Geochemistry of Modern and Ancient Saline Lakes, 3–12. SEPM (Society for Sedimentary Geology), 1994. http://dx.doi.org/10.2110/pec.94.50.0003.

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Conference papers on the topic "Chott el- (Tunisie)"

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Gabtni, H., C. Jallouli, K. L. Mickus, H. Zouari, and M. M. Turki. "Deep Structure of the Chott Jerid trough Southern Tunisia." In 2nd EAGE North African/Mediterranean Petroleum & Geosciences Conference & Exhibition. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.11.b02.

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Chaari, G., and P. Tremolières. "Structural Study and Impact on the Hydrocarbons Exploration, Chott El Jerid Area – Central Tunisia." In 4th EAGE North African/Mediterranean Petroleum and Geosciences Conference and Exhibition Tunis 2009. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609.20145797.

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Rezouga, Nawel, Anis Belhaj Mohamed, Moncef Saidi, and Ibrahim Bouazizi. "Assessment of Unconventional shale Reservoir, The Fegaguira Fm, Chotts Basin, Tunisia." In North Africa Technical Conference and Exhibition. Society of Petroleum Engineers, 2012. http://dx.doi.org/10.2118/150830-ms.

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Deroin, Jean-Paul, Damien Dhont, Majed Jabbour, Jean Chorowicz, and Benedicte Fruneau. "Geological mapping in the zone of Chotts, Tunisia, using ALOS sensors." In 2009 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2009). IEEE, 2009. http://dx.doi.org/10.1109/igarss.2009.5417987.

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BOUAZIZI, IBRAHIM, Moncef Saidi, and Anis Belhaj Mohamed. "Oil-Oil Correlation and Potential Source Rocks in the Chotts Basin, Tunisia." In 7th International Petroleum Technology Conference. Society of Petroleum Engineers, 2014. http://dx.doi.org/10.2523/17302-ms.

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Mohamed, A. Belhaj, M. Saidi, and M. Soussi. "Organic Geochemistry of the Paleozoic Source Rocks in the Chotts Basin, Southern Tunisia." In SPE North Africa Technical Conference and Exhibition. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/175830-ms.

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Klepacki, D. W., and J. A. Batchelor. "An Active Overthrust Belt and Associated Foredeep in the Chott Region of Central Tunisia – Some Implications for Hydrocarbon Exploration." In 1st EAGE North African/Mediterranean Petroleum & Geosciences Conference & Exhibition. European Association of Geoscientists & Engineers, 2003. http://dx.doi.org/10.3997/2214-4609-pdb.8.s016.

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Machowski, Robert. "CHEMICAL COMPOSITION OF THE SURFACE LAYER OF BOTTOM SEDIMENTS IN THE NORTHERN PART OF THE CHOTT EL JERID PERIODIC LAKE IN TUNISIA." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/11/s01.011.

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