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Experimental Investigation of the Stability of the Performance Characteristics of a Photovoltaic Module in the Face of Environmental and Meteorological Factors

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Open Journal of Applied Sciences 2024年第2期14卷 589-608页

作者： Adingra Paul Arsène Kouassi Siaka Touré Diakaridja Traoré laboratoire des Sciences de la Matière de l’Environnement et de l’Energie Solaire (LASMES) Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie (UFR-SSMT) Université Félix Houphou&#235t Boigny Abidjan C&#244te d’Ivoire

The explosive technological improvement of photovoltaic systems as well as the necessity of populations to come to less expensive energy sources, that have led to an implosion at the level of solar panel manufacturers. This causes a large flow of these equipments to developing countries where the need is high, without any quality control. That conducted an experimental investigation on the performance characteristics of a 250 wp monocrystalline silicon photovoltaic module in other to check the verification and quality control. Most of these PV panels which often have missing informations are manufactured and tested in places that are inadequate for our environmental and meteorological conditions. Also, their influences on the stability of internal parameters were evaluated in order to optimize their performance. The results obtained at maximum illumination (1000 w/m2) confirmed those produced by the manufacturer. The analysis of these characteristics showed that the illumination and the temperature (meteorological factors) influenced at most the stability of the internal characteristics of the module in the sense that the maximum power increased very rapidly beyond 750 w/m2 but a degradation of performance was accentuated for a temperature of the solar cells exceeding 50°C. The degradation coefficients were evaluated at -0.0864 V/°C for the voltage and at -1.6248 w/°C for the power. The 10° inclination angle of the solar panel proved to be ideal for optimizing overall efficiency in practical situations.

关键词： Renewables energies Instruments Internal Parameters of Photovoltaic Panel Monocrystalline Photovoltaic Panel Solar energy Production energy Intermittence

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Molecular detection of Resistance and Virulence Genes in Coagulase Negative Staphylococci Isolated from Blood Cultures at the University Teaching Hospital of Bouake

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Journal of Biosciences and Medicines 2024年第6期12卷 52-63页

作者： Oby Zéphirin Wayoro Ahou Micheline N’Guessan Adjaratou Traore Akissi Christine Houssou etilé Augustin Anoh Abdoulaye Diarrassouba Safiatou Karidioula Juste Olivier Tadet Pacôme Monemo Chantal Akoua-Koffi Centre Hospitalier et Universitaire (CHU) de Bouak Laboratoire de Bactriologie-Virologie Bouak Cte dIvoire departement des Sciences Fondamentales et Bioclinique UFR des Sciences Mdicales Universit Alassane Ouattara (UAO) de Bouak Bouak Cte dIvoire

Introduction: Coagulase-negative staphylococci (CoNS) are currently recognized as genuine pathogens. However, little is known about the resistance and virulence genes that explain their pathogenicity in hospitals in Cte d'Ivoire. The aim of this study was to contribute to the genotypic identification of resistance and virulence genes in CoNS isolated from blood cultures at the University Teaching Hospital (CHU) of Bouak, in order to improve patient management. Material and Methods: This was a descriptive study conducted from September to december 2023. The CoNS isolates studied came from the collection of strains isolated from blood cultures of febrile patients hospitalized or attending consultations at the CHU of Bouak. The strains were analyzed using conventional simplex PCR. Results: Of the 45 isolates analyzed, 46.7% carried both the aacA-aphD and tetK genes and 40% carried the mecA gene. With regard to virulence genes, only the LukS-PV gene was observed in S. epidermidis and S. haemolyticus isolates. Conclusion: The high prevalence of CoNS isolates carrying the mecA gene and the presence of virulence genes observed in this study give cause for concern in hospitals. It is important to develop comprehensive surveillance strategies against nosocomial and multi-resistant infections at the CHU of Bouak.

关键词： Coagulase-Negative Staphylococcus Gene Multiresistance Virulence Bouaké

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APOBEC3G Role on HIV Infection in Africa: A Systematic Review

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American Journal of Molecular Biology 2024年第1期14卷 25-42页

作者： Tegwinde Rebeca Compaore Abdoul Karim Ouattara Adama Baguiya Lassina Traore Abdou Azaque Zoure Henri Gautier Ouedraogo Seni Kouanda Jacques Simpore Biomedical and Public Health department Institut de Recherche en Sciences de la Santé (IRSS)/CNRST Ouagadougou Burkina Faso laboratoire de Biologie et de Génétique Moléculaire (LABIOGENE) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Centre de Recherche Biomoléculaire Pietro Annigoni (CERBA) Ouagadougou Burkina Faso Université Norbert Zongo (UNZ) Centre Universitaire de Manga Koudougou Burkina Faso

The highly active antiretroviral treatment (HAART) has allowed people living with HIV to live longer with a better quality of life. However, toxicity and the emergence of drug resistance arise from HAART use. Therefore, new antiretroviral therapy is needed since no cure or vaccine is available against HIV. Virus-host interaction has been proven to be important in the last decade. Host factors such as the C-C chemokine receptor type 5 (CCR5), a receptor used by HIV to penetrate host cells, have led to the discovery of the Maraviroc, which is an antiretroviral medication used in the United States. In contrast, other factors like C-X-C Motif Chemokine Receptor 4 (CXCR4) and the Apolipoprotein B mRNA editing enzyme catalytic polypeptide-like 3G (APOBEC3G), a potent host defense factor against HIV, is under investigation. APOBEC3G antiviral activity remains a possible therapeutic target against HIV. This systematic review aimed to synthesize the available evidence on the role of APOBEC3G polymorphisms and their expression on HIV infection disease progression in Africa. We used Web of Science, PubMed, Embase, and Google Scholar and searched for relevant publications in French or English reporting on APOBEC3G polymorphisms association with HIV infection in African populations from January 2009 to May 2023. The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-analyzes) was used to process for reporting systematic review. Fifteen studies were included, of which seven were on APOBEC3G polymorphisms and eight were on APOBEC3G expression. Among the APOBEC3G polymorphisms, the most studied was H186R or rs8177832. The average of the minor allele frequency of H186R of APOBEC3G available for the studies included in this study was 0.29 with a 95% CI (0.172;0.401) and varied from 0.108 reported in Uganda to 0.47 recorded from Burkina Faso. The polymorphism H186R was not associated with HIV status in Southern Africa. However, the referent allele of H186R was protectiv

关键词： APOBEC3G HIV Genetic Variation Therapeutic Target African Populations

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Indirect Electroanalysis of 3-Methyl-4-Nitrophenol in Water Using Carbon Fiber Microelectrode Modified with Nickel Tetrasulfonated Phthalocyanine Complex

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Materials Sciences and Applications 2024年第2期15卷 25-35页

作者： Yibor Fabrice Roland Bako Serge Foukmeniok Mbokou Boukaré Kaboré Issa Tapsoba Maxime Pontié laboratoire de Chimie Analytique Environnementale et Bio-organique (LCAEBiO) Département de Chimie Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Institut des Sciences et de Technologie Ecole Normale Supérieure Ouagadougou Burkina Faso Group of analysis and Processes Analysis (GA&P) Département de Chimie Université d’Angers Angers France laboratoire de Sciences et Technologies (LaST) Université Thomas SANKARA Ouagadougou Burkina Faso

Electrochemical detection of 3-methyl-4-nitrophenol (MNP) in direct phenol oxidation occurs at high potentials and generally leads to progressive passivation of the electrochemical sensor. This study describes the use of a carbon fiber microelectrode modified with a tetrasulfonated nickel phthalocyanine complex for the detection of MNP at a lower potential than that of direct phenol oxidation. The MNP voltammogram showed the presence of an anodic peak at -0.11 V vs SCE, corresponding to the oxidation of the hydroxylamine group generated after the reduction of the nitro group. The effect of buffer pH on the peak current and SWV parameters such as frequency, scan increment, and pulse amplitude were studied and optimized to have better electrochemical response of the proposed sensor. With these optimal parameters, the calibration curve shows that the peak current varied linearly as a function of MNP concentration, leading to a limit of detection (LoD) of 1.1 μg/L. These results show an appreciable sensitivity of the sensor for detecting the MNP at relatively low potentials, making it possible to avoid passivation phenomena.

关键词： 3-Methyl-4-Nitrophenol Carbon Fiber Microelectrode Nickel Tetrasulfonated Phthalocyanine Indirect Electroanalysis Square Wave Voltammetry

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High-Order Two-Scale Asymptotic Paradigm for the Elastodynamic Homogenization of Periodic Composites

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Acta Mechanica Solida Sinica 2024年第1期37卷 124-138页

作者： Wei-Zhi Luo Mu He Liang Xia Qi-Chang He State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China laboratoire Modélisation et Simulation Multi-Echelle MSME UMR 8208 CNRSUniversite Gustave Eiffel77454 Marne-la-ValléeFrance

The classical two-scale asymptotic paradigm provides macroscopic and microscopic analyses for the elastodynamic homogenization of periodic composites based on the spatial or/and temporal variable,which offers an approximate framework for the asymptotic homogenization analysis of the motion ***,in this framework,the growing complexity of the homogenization formulation gradually becomes an obstacle as the asymptotic order *** such a context,a compact,fast,and accurate asymptotic paradigm is *** work reviews the high-order spatial two-scale asymptotic paradigm with the effective displacement field representation and optimizes the implementation by symmetrizing the tensor to be ***,the modified implementation gets rid of the excessive memory consumption required for computing the high-order tensor,which is demonstrated by representative one-and two-dimensional *** numerical results show that(1)the contrast of the material parameters between media in composites directly affects the convergence rate of the asymptotic results for the homogenization of periodic composites,(2)the convergence error of the asymptotic results mainly comes from the truncation error of the modified asymptotic homogenized motion equation,and(3)the excessive norm of the normalized wavenumber vector in the two-dimensional inclusion case may lead to a non-convergence of the asymptotic results.

关键词： Composites Homogenization Asymptotic analysis Dynamics Dispersion

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Petrographic and Geochemical Characteristics of the Pouni Palaeoproterozoic Formations North of the Léo Square degree (Burkina Faso, West Africa)

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Open Journal of Geology 2024年第1期14卷 126-141页

作者： Adama Ouédraogo Yaméogo Pascal Ouiya Hubert Gounwendmanaghré Zongo Omar Akonyiré Abraham Seydoux Traoré Saga Sawadogo Séta Naba Unité de Formation et de Recherche en Sciences et Technologies Département des Sciences de la Vie et de la Terre Université Norbert Zongo Koudougou Burkina Faso Unité de Formation et de Recherche en Sciences de la Vie et de la Terre Laboratoire Géosciences et Environnement (LaGE) Département des Sciences de la Terre Université Joseph Ki-Zerbo Ouaga Burkina Faso Ecole Normale Supérieure (ENS) Institut des Sciences et de Technologie (IST) Ouaga Burkina Faso Ecole Supérieure d’Ingénieries Université de Fada N’gourma Fada N’Gourma Burkina Faso

The Pouni area is made up of basalts belonging to the Boromo belt, lamprophyres and granitoids. These geological formations are similar to geological formations of the same type in other regions of the Palaeoproterozoic domain of the Man/Leo shield. This study, which focused on the petrographic and geochemical characteristics of these geological formations, led to the following main conclusions: The lamprophyres are basic plutonic rocks that cut through other geological formations. The basalt belongs to the northern part of the Borormo belt and is thought to be a relic of overthickened oceanic plateaus. There are two groups of granitoid rocks. The granodiorite has a geochemical signature close to that of Archean TTGs and is metaluminous in character. It has a low potassium content. The minor element and rare earth element spectra indicate that it could be derived from partial melting of basic magmatic rocks. Biotite granites are peraluminous and highly potassic. Minor element contents and rare earth spectra indicate that they could be derived from partial melting of felsic materials. Geotectonic diagrams show that the granitoids identified in the Pouni zone were emplaced in an active tectonic context, similar to that of present-day subduction zones.

关键词： Burkina Faso Dori Man/Léo Shield Petrography Geochemistry Partial Melting Geotectonic Context

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Insight from Lithostructural and Aeromagnetic Data from the Léo Square degree, Central-Western Burkina Faso

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Open Journal of Geology 2024年第1期14卷 19-28页

作者： Adama Ouédraogo Yaméogo Pascal Ouiya Gounwendmanaghré Hubert Zongo Omar Akonyiré Abraham Seydoux Traoré Saga Sawadogo Séta Naba Unité de Formation et de Recherche en Sciences et Technologies Département des Sciences de la Vie et de la Terre Université Norbert Zongo Koudougou Burkina Faso Unité de Formation et de Recherche en Sciences de la Vie et de la Terre Laboratoire Géosciences et Environnement (LaGE) Département des Sciences de la Terre Université Joseph Ki-Zerbo Ouaga Burkina Faso Ecole Normale Supérieure (ENS)/Institut des Sciences et de Technologie (IST) Ouaga Burkina Faso Ecole Supérieure d’Ingénieries Université de Fada N’gourma Fada N’Gourma Burkina Faso

This study, carried out in the Léo square degree (west-central Burkina Faso) in the Palaeoproterozoic domain of the Man/Léo ridge, aims to define the shapes and positions of granitic plutons and the organisation of deformation structures using aeromagnetic data. These data have shown that there are small sub-circular granitic bodies to the north of the granitic masses in this region, and a large sub-circular granitic body to the south, around which are other smaller granitic bodies. The lineament map shows that the deformation structures are organised along three main directions and largely form these sub-circular plutonic bodies. We suggest that the granitic plutons are coalescent, pending identification of the internal structures of these granites to further refine the geodynamic model.

关键词： Burkina Faso Lineaments Belts Rocks Leo’s Leaf Granitoïd Airbornes Magnétics

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Petrographic and Geochemical Characteristics of the Granitoids in the South of Godé (North of the Square degree of Léo-Burkina Faso, West Africa)

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International Journal of Geosciences 2024年第2期15卷 106-118页

作者： Adama Ouédraogo Yaméogo Hubert Gounwendmanaghré Zongo Pascal Ouiya Omar Akonyiré Abraham Seydoux Traoré Saga Sawadogo Séta Naba Unité de Formation et de Recherche en Sciences et Technologies Département des Sciences de la Vie et de la Terre Université Norbert Zongo Koudougou Burkina Faso Unité de Formation et de Recherche en Sciences de la Vie et de la Terre Laboratoire Géosciences et Environnement (LaGE) Départe-ment des Sciences de la Terre Université Joseph Ki-Zerbo Ouaga Burkina Faso Ecole Supérieure d’Ingénieries Université de Fada N’gourma Fada N’Gourma Burkina Faso Ecole Normale Supérieure (ENS)/Institut des Sciences et de Technologie (IST) Ouaga Burkina Faso

South of Godé, in the central-western region of Burkina Faso, granitoids of Paleoproterozoic age are similar to those of the Man/Leo shield. This study focused on the petrographic and geochemical characteristics of these granitoids, with the following results: 1) The tonalite that outcrops in the south-west of the study area belongs to the TTG group or first generation granitoids. They are most often ribboned at outcrop and have a geochemical signature close to that of Archean TTGs. Tonalite has a metaluminous character and the REE spectrum indicates that it may be derived from partial melting of basic magmatic rocks. 2) Biotite granites have no outcrop structure. They are weakly metaluminous to peraluminous and potassic to highly potassic. Their rare earth spectra indicate that they may be derived from the partial melting of TTG granitoids. 3) Geotectonic diagrams show that the granitoids studied to the south of Godé were emplaced in an active tectonic context similar to that of present-day subduction zones.

关键词： Burkina Faso Godé Man/Leo Shield Petrography Geochemistry Partial Melting Geotectonic Setting

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High frequency of severe liver dysfunction in critically ill dengue patients in the French West Indies

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Journal of Intensive Medicine 2024年第3期4卷 403-404页

作者： Laurent Camous Samuel Markowicz Cecile Loraux Julien Jabot Jean David Pommier Réanimation Médicale et Chirurgicale CHU de GuadeloupeChemin ChauvelLes Abymes97139 GuadeloupeFrance Service de Maladies infectieuses et tropicales CHU de GuadeloupeChemin ChauvelLes Abymes97139 GuadeloupeFrance Service de Microbiologie CHU de GuadeloupeChemin ChauvelLes Abymes97139 GuadeloupeFrance Médecine Intensive et Réanimation Centre hospitalier universitaire de la Réunion 97460 Saint-PaulFrance Institut Pasteur de la Guadeloupe Morne Jolivière97183 AbymesFrance

dear Editor,dengue is a worldwide zoonosis,transmitted by mosquitoes and highly prevalent in tropical and subtropical *** recent years,its incidence has increased with a massive healthcare burden worldwide[1]and recent climatic changes have expanded the geographic range of the insect vector with described outbreaks in Europe.[2]Most patients present pauci-symptomatic infections,but some patients could present severe manifestations with high reported mortality[[3],[4],[5]]and no specific *** bleeding,hemodynamic failure and various organ damage(cardiac,renal,neurological,and hepatic)are described in severe dengue(SD)patients.[5]In the future,intensivists worldwide will be increasingly treating SD and the spectrum of severe organ impairment should be well known.

关键词： patients mortality expanded

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Long-wave instabilities

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Science China Mathematics 2024年第8期67卷 1761-1776页

作者： Dongfen Bian Emmanuel Grenier School of Mathematics and Statistics Beijing Institute of TechnologyBeijing 100081China Unité de Mathématiques Pures et Appliquées CNRS UMR 5669Ecole Normale Supérieure de LyonLyon 69007France

This paper aims to give a detailed presentation of long-wave instabilities of shear layers for NavierStokes equations,and in particular to give a simple and easy-to-read presentation of the study of the OrrSommerfeld equation and to detail the analysis of its *** these analyses,we prove the existence of long-wave instabilities in the cases of slowly rotating fuids,slightly compressible fuids,or fuids with Navier boundary conditions,under smallness conditions.

关键词： Navier-Stokes equations boundary layers Prandtl equations

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