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Tectonic implications of new late Cretaceous paleomagnetic constraints from Eastern Liaoning Peninsula,NE China

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Tectonic implications of new Late Cretaceous paleomagnetic c...

Agro-Morphological Characterization of a Collection of Fonio [Digitaria exilis (Kippist.) Stapf.] Accessions from Burkina Faso

中国科学院地质与地球物理研究所2003学术年会

作者： Michel Faure departement des sciences de la terre Institut des Sciences de la Terre d’OrleansUniversite d’OrleansOrleansFrance

A paleomagnetic study has been carried out in the east of the Tan-Lu fault,in Liaoning Province,NE China,to understand the timing of Tan-Lu fault *** aging from Early Paleozoic to late Mesozoic from 51 sites have been *** and late Permian-Early Triassic rocks are remagnetized by the recent geomagnetic field;however, late Cretaceous(between 118 and 83 Ma) red tuffaceous sandstone passes a positive fold test,shows no Present Earth Field characteristic remanent magnetization carried by both magnetite and hematite,presents a solo normal polarity,and thus provides the only reliable paleomagnetic data in this *** paleomagnetic pole calculated from these rocks(λ = 59.4°N,φ = 205.5°E,and A = 7.3°) is statistically undistinguishable from all available Cretaceous paleomagnetic data from Eastern Liaoning-Korean Peninsula,indicating that these areas may belong to a single tectonic unit,here named the East Liaoning-Korea(ELK) Block,at least since the late ***,a significant discrepancy between the ELK Block and Chinese Block(i.e.,North and South China Blocks) characterized by a differential rotation(22.5°±10.2°) with a negligible latitudinal displacement(0.8°±6.1°) is *** result indicates,first,that the left-lateral displacement along the Tan-Lu fault,if any,must have occurred before the late Cretaceous and,second,that the Korean Block can not be considered as a rigid part of North China *** and structural evidence show that the Meso-Cenozoic triangle shaped plain,consisting of Songliao,Xialiaohe,Sanjiang,Zeya,and other smaller basins developing in northeast China and southeast Russia,south of the Mongol-Okhotsk Belt,experienced a heterogeneous rifting from the late Jurassic to *** variable amount of extension,larger in the northeast(～300 km) than in the southwest(～80 km),is probably related to the clockwise rotation of the ELK Block centered at the south of the Bohai Bay *** resu

关键词： pateomagnetism rifting continental margin Meso-Cenozoic geodynamics Songliao Basin northeastern China plain

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American Journal of Plant sciences 2023年第6期14卷 677-690页

作者： Balma Patrice Kabore Boukare Kiebre Mariam Kiebre Zakaria Sanou Jacob Bationo/Kando Pauline laboratoire Biosciences Unité de Formation et de Recherche en Sciences de la Vie et de la Terre Université Joseph KI-ZERBO Ouagadougou Burkina Faso Institut de l’Environnement et de Recherches Agricoles/Farako-Bñ (INERA/Farako-B&#241) Bobo Dioulasso Burkina Faso

Considered as the oldest cereal, fonio (Digitaria exilis Stapf.) is grown in West Africa for its therapeutic virtues, its nutritional and organoleptic qualities. It plays an important socio-cultural and economic role for the populations of western Burkina Faso. However, very few studies on the genetic diversity of fonio have been carried out. This study aims to contribute to a better knowledge of the diversity of Digitaria exilis in Burkina Faso using agro-morphological descriptors. Thus, 60 accessions of fonio collected from western Burkina Faso were characterized using 21 agro-morphological characters according to an Alpha latice design with three replications. The study showed morphological variability for most of the qualitative and quantitative characters studied. Principal component analysis (PCA) explained 56.07% of the variability. Hierarchical cluster analysis splits the accessions of the collection into four clusters using seven characters. These characters can constitute basic criteria for differentiating fonio accessions in Burkina Faso. The accessions of Group II have a long cycle and high production of grain, while the accessions of Group IV have a short cycle and low production of grain. The groups identified can serve as a starting point for fonio breeding in Burkina Faso.

关键词： Digitaria exilis Agro-Morphological Variability Accession Burkina Faso

Abundance and Diversity of Woody Undergrowth Reservoir as Indicator of Suitable Vegetation Patch for Natural Regeneration

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Open Journal of Ecology 2022年第2期12卷 113-132页

作者： Saran Traoré Issiaka Keïta Sébastien Ange Habih Nombré Hassan Bismarck Nacro Brice Sinsin UFR/de la vie et de la terre Université Nazi Boni Bobo-Dioulasso Burkina Faso laboratoire d’etude et de Recherche en Fertilité de Sols IDR Université Nazi Boni Bobo-Dioulasso Burkina Faso laboratoire de Biologie et Ecologie Végétales UFR-Sciences de la Vie et de la Terre Université Joseph Ki-Zerbo Ouagadougou Burkina Faso laboratoire d’Ecologie Appliquée Faculté des Sciences Agronomiques Université d’Abomey-Calavi Cotonou République du Bénin

The diversity, abundance and height structure of naturally regenerated woody species were analyzed and compared for undergrowth reservoir associated with vegetation patches as bowal, shrubland and woodland for understanding the effect of vegetation conditions on spatial distribution of woody plants in Sudanian ecosystem. All undergrowth individuals (height ded by species and the total height and collar diameter were measured in 50 subplots of 5 m × 5 m (or 25 m2) laid out in each vegetation patch during rainy season. In total 52 undergrowth species and 2224 stems arranged in 38 genera and 21 families out of which 25, 36 and 38 species were found in bowal, shrubland and woodland respectively and 15 shared species. Combretaceae, Caesalpiniaceae and Mimosaceae families were the most abundant and species density was significantly higher (P land and woodland than bowal, and increase diversity in only shrubland (P = 0.002) comparing with bowal. Undergrowth was abundantly concentrated in small height class as canopy benefit and indicate a specific-site distribution. Results also showed that bowal had a particular vegetation which vary in function of tree community characters in place (P land and shrubland are similar vegetation patches. As conclusion, the study vegetation patches form suitable regeneration niches for the undergrowth reservoir of limited number of species which in return can be predictor of species richness and abundance and thus the structure of tree community. Woody undergrowth community could be considered in biodiversity management and degraded land restoration. Supplementary works could be undertaken to understand the characteristics of seed bank for bowal, shrubland and woodland regarding the undergrowth and tree communities.

关键词： Biodiversity Conservation Burkina Faso Regeneration Spatial Heterogeneity Sudanian Ecosystems

Critical review of EPS production, synthesis and composition for sludge flocculation

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Journal of Environmental sciences 2018年第4期30卷 225-245页

作者： Klai Nouha Ram Saurabh Kumar Sellamuthu Balasubramanian Rajeshwar Dayal Tyagi Universite du Quebec Institut national de la Recherche Scientifique Centre Eau Terre & Environnement 490 de la CouronneQuebec G1K 9A9 Canada Institut Armand-Frappier 531 boul. des Prairies Laval Quebec H7V 1B7 Canada

Extracellular polymeric substances（EPS） produced by microorganisms represent biological macromolecules with unfathomable potentials and they are required to be explored further for their potential application as a bioflocculant in various wastewater sludge treatment. Although several studies already exist on biosynthetic pathways of different classical biopolymers like alginate and xanthan, no dedicated studies are available for EPS in sludge. This review highlights the EPS composition, functionality, and biodegradability for its potential use as a carbon source for production of other metabolites. Furthermore, the effect of various extraction methods（physical and chemical） on compositional, structural, physical and functional properties of microbial EPS has been addressed. The vital knowledge of the effect of extraction method on various important attributes of EPS can help to choose the suitable extraction method depending upon the intended use of EPS. The possible use of different molecular biological techniques for enhanced production of desired EPS was summarized.

关键词： Extracellular polymeric substances Metabolic pathways Extraction methods Flocculation properties

Urban landscape structure anatomy:Structure patterns and typology identification in the space-time of Setif City,Algeria

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Frontiers of Architectural Research 2022年第3期11卷 421-439页

作者： Hodne Sami Belmahdi Abderezak Djemili laboratoire Architecture Urbanisme et Transport:HabitatPaysage et Mobilite Urbaine(LAUTr-HPM)Institut d'Architecture et d’UrbanismeUniversite Batna 1 HadJ LakhdarBatna 05000Algeria laboratoire Habitat et Environnement(LHE) Departement d’ArchitectureInstitut d’Architecture et des Sciences de la TerreUniversite Ferhat Abbas Setif 1Setif 19000Algeria

The definition of urban form and its elements raises a wide debate in urban *** study presents a proposal to understand the structuring of the urban landscape of Setif City over 170 years(1848-2018)by abstracting its main elements into permanent structure(PSUL).It corresponds to the street network,more static to the change of the town plan,and flexible structure(FSul),more resilient to change and explains the superimpositions of morphological components(plot,building,and land use).This work aims to identify typological patterns of structures suggested in space-time through the inspection of the growth of the street network and the filling of morphological layers framed by the concept of *** methodology is based on syntactic(diachronic)morphogenetic analysis,with statistical analyses as unsupervised *** indicate that PSUL presents an accumulation of microincrements produced with a similar degree of coherence in different urban fabrics,which explain the local patterns of street network *** typology of FSul patterns indicates an unbalanced growth by the arrangement between morphological elements,resulting in a variation in the degree of urbanity.

关键词： Urban landscape structure Permanent structure Flexible structure Patterns

Tarkwaian deposits of the Birimian Belt of Houndé: Petrological, Structural and Geochemical Study (Burkina-Faso, West Africa)

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International Journal of Geosciences 2016年第5期7卷 685-700页

作者： Yao Honoré Koffi Urbain Wenmenga Sagbrou Chérubin Djro department des sciences de la terre Laboratoire de géoressource Université Ouagadougou I Pr. Joseph Ky Zerbo Ouagadougou Burkina-Faso departement des sciences de la terre et des Ressources Minières (STRM) Laboratoire de la Géologie du Socle et de Métallogénie Université Felix Houphouet Boigny Abidjan Cote d’Ivoire

The Tarkwaian deposits of the Birimian belt of Houndé are located in the Baoule-Mossi Paleoproterozoic area of the West African Craton. The sedimentary units consist of sandstone heterometric pelitic feldspthic sandstone with locally interbedded breccias, puddings and polygenic conglomerates. Lithic pebbles and macroscopic fragments that are similar to vein type originated quart castings and andesitic-dacitic projections, felsic sub-volcanic rocks evolving from microdioritic to microgranite composition are detected in terrigenous sediments. The volcanic packages form a linear strip composed of basic to intermediate rocks and andesitic to dacitic volcaniclastites. The contacts between these units are not clearly exposed but the different facies between the polygenic conglomerates and sandstones show discordant tectonic contacts with the Tarkwaian and the Birimian. The geochemical nature of these Tarkwaian formations is strongly influenced by the relative decline of the dominant quartz of feldspars and phyllites. The improperly classified and immature feldspathic sandstones show context affinities of island arc probably dictated by Birimian lithic products. Sedimentologically, the cross-bedded stratification and the predominance of sandstone terrigenous lands indicate a deposition in a fluvio-deltaic hydrodynamic setting along intermontane Birimian rift. The similarities between these Tarkwaian formations and the typical Tarkwaian of the Tarkwa basin in Ghana are probably limited to petrographic and not stratigraphic aspects, which lead to likening them to flyscho?d or molassic tardi Birimian deposits.

关键词： Tarkwaian Birimian Sandstone Polygenic Conglomerat Molassic Fluvio-deltaic

Anthropogenic Activities and the degradation of the Environmental Quality in Poor Neighborhoods of Abidjan,Cote d’Ivoire:Abia Koumassi Village

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Journal of Environmental Protection 2013年第10期4卷 1099-1107页

作者： S.Loko K.E.Ahoussi Y.B.Koffi A.M.Kouassi J.Biemi laboratoire de chimie et de Microbiologie Universite Technologique et Tertiaire Loko(UTTLOKO)AbidjanCote d’Ivoire Unite de Formation et de Recherche(UFR)des sciences de la terre et des Ressources Minieres(STRM) Universite de CocodyCocodyCote d’Ivoire departement des sciences de la terre et des Ressources Minieres(STeRMi) Institut National Polytechnique Felix Houphouet Boigny(INP-HB)YamoussoukroCote d’Ivoire

This study deals with the degradation of the quality of the water environment in the village of Abia Koumassi, due to the pollution that has risen in Abidjan. The method used in this study is based on piezometric measurements, the physico-chemical and microbiological analysis. The results were processed using statistical and hydrochemical methods. The groundwater in the village is shallow, with a piezometric average level 0.55 m. The groundwater flows from the north of the village to the south. The Water resources have a neutral pH that varies between 6.8 and 7.43. Water temperature varies from 27.7°C to 29.8°C. The Water is highly mineralized, with electrical conductivity ranging from 585 μS/cm to 1310 μS/cm. The groundwater contains high levels of nitrate (116.81 mg·L-1) greater than the WHO standard for drinking water. High levels of Metallic Trace Elements (Ni, Zn, Co, Cr, Pb, Fe, Cu and Cd) are found in the water. Microbiological analysis shows that the water contains important levels of Escherichia coli, faecal streptococci, Clostridium perfringens and thermo tolerant coliform. These microorganisms create microbiological pollution in the water from the area. The Water resources of the village are facing a recent faecal pollution of human origin. This pollution comes from anthropogenic activities taking place in the area.

关键词： Anthropogenic Activities Environment Pollution Water Sanitation and Quality

Study of Varietal Influence Post Conservation on Biochemical and Sensory Qualities of Attiékéand Boiled Cassava (Manihot esculenta Crantz)

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Agricultural sciences 2016年第3期7卷 127-136页

作者： Pierre Martial Thierry Akely Yves Djina Brou Roger Konan Kady Irie Lucien Patrice Kouame N’guessan Georges Amani laboratoire de Biochimie Alimentaire Technologie de Produits Tropicaux UFR STA UNA Abidjan Cote d’Ivoire Section sciences de la vie et de la terre Sciences et Technologie ENS Abidjan Cote d’Ivoire laboratoire d’Enzymologie et Catalyse Enzymatique UFR STA UNA Abidjan Cote d’Ivoire

Cassava root is shortly preserved after harvesting due to its tanning and rapid physiological decomposition. Consequently, the commercial value is reduced and the craving of its finishes products. With an aim of improving physiological quality, post harvest food value “the effects of bleaching and conservation in silo-pits were evaluated. Four (04) varieties of cassava: Bocou1, Bocou2, Bocou3 and Yavo were collected fresh and healthy in 13 months of maturity. They were subjected to a bleaching (65°C /15 - 30 s) followed by a kinetic conservation (7 days of intervals) in silo-pit (1 × 0.6 × 0.5 m). Results show that Bocou2 variety has the high proteins content (2.64% ± 0.01%), followed by hydrocyanic acid (8.21 ± 0.01 mg/100 g) and total carotenoids (26.7 μg/100 g). The conservation influences positively the protein content, reducing sugars content, the dries matter content and the total phenolic compounds for all the varieties excluded Bocou2 variety whose protein content drops. As regard of the fat contents, a weak increase is observed. The sensory analysis reveals that the boiled cassava of the Yavo variety is more appreciated followed by Bocou1 variety. Concerning the Attiéké, Bocou3 variety gives the more appreciated dish followed by the Yavo variety. In conclusion, the silo-pit conservation after bleaching improves the physiological quality of the cassava and the sensory taste even during 14 days. This study has a huge impact of reducing the post harvests losses and increases the commercial value of cassava in the world.

关键词： Cassava Atttieke Boiled Post Conservation Silo-Pit Case Sensory Quality

Assessment of Risk of Malnutrition in Elderly Hypertensive Patients with or without Associated Cardiovascular Risk Factors Living at Home (West Algeria) Sidi-Bel-Abbès

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International Journal of Clinical Medicine 2016年第2期7卷 144-168页

作者： Hamza Nadjib Merad-Boudia Karima Bereksi-Reguig Département de Biologie Faculté des Sciences de la Nature et de la Vie Université Djilali Liabès Sidi-Bel-Abbès Algérie

Undernutrition is frequently underestimated in the elderly, because clinical manifestations are non-specific. For the francophone Club geriatrics and nutrition, poly medication is one of the warning signs to be the possibility of malnutrition in an elderly person. To do this, it is particularly interesting to verify what the profiles of hypertensive patients who are at risk of malnutrition are. This component remains very little explored and studies are lacking. The authors conducted a descriptive cross-sectional study whose objective is to evaluate the prevalence of undernutrition in hypertensive patients with or without associated cardiovascular risk factors, in a population of consultants of liberal medical offices, determine the profiles of hypertensive patients who are at risk of undernutrition and describe their eating habits and their anthropometric parameters as well as the link between the number of supported antihypertensives and risk of undernutrition. 1144 patients with an average age of 65 years old have been collected during the period of recruitment. The data collection was done using a questionnaire: the MNA. Sensitive and specific, it is validated method which has international sacle. The percentage of the risk of malnutrition was estimated at 36.7%. Thus the number of associated cardiovascular risk factors becomes larger, and the risk of malnutrition is increased. The risk of malnutrition was three times higher in patients who take more than three medications per day compared with those who consumed less (75.8% vs. 24.2%). As a monotherapy, an increased risk of malnutrition is associated with diuretics. For these older hypertensives, the risk of malnutrition was linked to the type of used dual. The percentage of hypertension risk of malnutrition treated with free dual was significantly higher compared to hypertensive treated dual handset. Some associations have proved to be more favorable than others in terms of nutritional risk. Finally, a third o

关键词： Risk of Malnutrition Cardiovascular Risk Poly Medication Older Hypertensive Mini Nutritional Assessment