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Quality of Life of Chronic Haemodialytic Patients at Cotonou Teaching Hospital (BENIN)

Open Journal of Nephrology 2014年第4期4卷 131-141页

作者： Elhadji Fary Ka Jacques Vigan Ahmed Tall Lemrabott Noriace Excelle Zohoun Mohamedou Moustapha Cissé Séraphin Ahoui maria faye Younoussa Keita Khodia Fall Bruno Léopold Agboton Abdou Niang Boucar Diouf Nephrology Department Aristide Le Dantec Hospital Dakar Senegal Nephrology and Hemodialysis Clinic Hubert Koutoukou Maga Teaching Hospital Cotonou Benin

Introduction: The objectives of this work were to assess haemodialytic patients’ quality of life (QoL) and to identify factors affecting this QoL. Patients and Methods: It was a three (03) month monocentric and transversal study (from October 24, 2011 to January 27, 2012) conducted in the haemodialysis unit at Hubert Koutoukou Maga Teaching Hospital (CNHU-HKM) in Cotonou. Patients included were residents of Benin, aged 18 years and above, chronic haemodialysis in this unit for over 3 months, and willfully gave their consent. Quality of life was evaluated using questionnaire on Kidney Disease Quality of Life Short-Form French version 1.2 (KDQoL-SF 36). Epidemiological data, nephropathy etiologies and purification parametres were recorded in patients files. Data statistical analysis was performed using SPSS software 11.5. Results: In total 131 patients were involved in the study. The average age was 50.27 ± 12.17 years with a sex ratio of 1.69. Nephroangiosclerosis was the 1st cause. Most patients 128 (97.71 %) received two haemodialysis sessions on weekly basis. The Average Overall Score (AOS) based respectively on SF 36 and KDQoL was 48.55 and 58.55. The average of both SF 36 and KDQoL AOS was 53.55. Factors affecting hemodialytic patients quality of life were vitality, limitations related to mental health and physical condition, burden of kidney disease, effect of the disease on daily life and occupational status. The study revealed that: Patients education level was correlated with vitality

关键词： Quality of Life Haemodialysis Patients Chronic Kidney Disease Benin

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Determination of the Series Resistance of a Series Vertical-Junction Silicon (N+/P/P+) Solar Cell under Polychromatic Illumination and Magnetic Field: Effect of Optimum Thickness

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Journal of Modern Physics 2024年第10期15卷 1543-1554页

作者： Dibor faye Babou Dione Mountaga Boiro Pape Diop Semiconductor and Solar Energy Laboratory Department of Physics Cheikh Anta Diop University Dakar Senegal

By solving the magneto-transport equation for excess minority charge carriers in the base of the series vertical-junction silicon cell, the phenomenological parameters of the cell can be determined from the boundary conditions. Photocurrent density and photovoltage are determined for each value of applied magnetic field and corresponding optimum thickness, to establish the current-voltage characteristic (Jph(Sf, Sb, z, B, Hop)-Vph(Sf, Sb, z, B, Hop) of the silicon cell under polychromatic illumination. This study will make it possible to reduce the material used (by reducing the optimum thickness), which will help to lower prices. It will also enable us to reduce betting effects (lower series resistance), thereby boosting solar cell efficiency.

关键词： Series Vertical Junction Silicon Cell Static Regime Magnetic Field Optimum Thickness Series Resistance

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Secondary Hypertension in Sub-Saharan African Populations: A Retrospective Study between 2011 and 2016 at Regional Hospital of Saint-Louis, Senegal

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Open Journal of Nephrology 2016年第3期6卷 93-97页

作者： Yaya Kane Joel Simon Manga Diatou Gueye Dia Maiga Moussa Zeinabou Tondi Ahmed Tall Lemrabott maria faye Sidy Mouhamed Seck Mouhamadou Moustapha Cisse Alex Ismael Keita Kalilou Diallo El Hadj Fary Ka Abdou Niang Boucar Diouf Nephrology-Cardiology and Internal Medicine Department Assane Seck University Ziguinchor Sénégal Nephrology and Internal Medicine Department Gaston Berger University Saint-Louis Sénégal Nephrology Department Abdou Moumouni University Niamey Niger Nephrology Department Teaching Hospital Aristide Le Dantec Dakar Senegal

Introduction: High blood pressure (HBP) is a worldwide health issue responsible of high cardiovascular morbidity and mortality. Even though essential HBP is far the most frequently reported in patients, secondary causes must be known because of their severity and the possibility of aetiological treatment. No recent epidemiological data are available about secondary causes of HBP in black African populations. The aim of this study was to describe aetiological patterns of secondary HBP in patients followed at Saint-Louis Hospital. Patients and Method: We conducted a retrospective and descriptive study in regional hospital of Saint-Louis. All patients aged ≥15 years old admitted from January 1st 2011 to January 31st 2015 in internal medicine, nephrology, emergency and cardiology departments were included. Clinical, paraclinical data and patients outcomes were collected from medical records. Hypertension was defined according to JNC8 criteria. Secondary HBP was considered if explorations identified a clear aetiology to hypertension. Statistical analysis was done with Excel 2010 and STATA 12.0. Results: We included 9253 patients with mean age of 35 ± 12 years (15 - 83 years) and sex-ratio of 1.6. Overall 67.5% of patients had hypertension and secondary causes were found in 10.5% of them. The majority of patients presented clinical symptoms suggesting a secondary cause of HBP and first-line laboratory explorations were normal in half of cases. Renal diseases were responsible for 79.1% of secondary HBP cases mainly dominated by glomerulonephritis (22.6%), vascular nephropathies (18.7%) and autosomal dominant polycystic kidney disease (5.8%). They were followed by preeclampsia (13.6%) and endocrinal aetiologies such as hyperthyroidism (5.8%), hypercorticism (0.5%), pheochromcytoma (0.5%), primary hyperparathyroidism (0.4%) and Conn’s adenoma (0.1%). Combination of ≥3 antihypertensive drugs was necessary in 71.5% of cases and surgical treatment was performed in three patient

关键词： Secondary High Blood Pressure Internal Medicine Black Africans

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Study of the Biological Quality of the Water in the Manantali Dam Reservoir: Analysis of the Fish Fauna and Plankton Communities

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Journal of Agricultural Chemistry and Environment 2024年第1期13卷 100-114页

作者： Joseph Mbeur faye Saïdou Ndao Louis Eugène Victor Sambou Laboratory of Water and Environment Sciences and Technologies (LaSTEE) Polytechnic School of Thies (EPT) Thies Senegal UFR Sciences et Technologies (SET) University Iba Der Thiam of Thies (UIDT) Thies Senegal

The aim of this study of the Manantali dam reservoir is to investigate the biological quality of the water through inventories and analysis of the ichthyofauna and planktonic communities (zooplankton and phytoplankton). Inventories of ichthyofauna and plankton communities were carried out quarterly from 2003 to 2022. The fish populations studied on the basis of bioindicators (species richness, diversity index, equitability index, diversification index) identified 29 species belonging to 10 families. The Cichlidae family is the most represented, while the Schilbeidae and Tetraodontioae families are less represented in terms of number of species. The species Hydrocynus forskalii and Brycinus nurse with relative abundances of 40.12% and 21.4% respectively, both from the family Alestidae, are the most abundant. The species H. forskalii has a frequency of occurrence of 100%. The specific diversity index of 2.9 and the equitability index of 0.6 show an average diversity of fish species. The diversification index of 2.9 indicates a theoretical number of habitats of 2 to 3. The planktonic community is made up of zooplankton and phytoplankton. The inventory of zooplankton shows the presence of 28 zooplankton species belonging to 9 families of the three zooplankton groups Rotifera, Cladocera and Copepoda. Analysis of the frequencies of occurrence of the various taxa showed that the characteristic species of Lake Manantali are the omnipresent rotifers Keratella cochlearis, Keratella quadrata and Trichocerca chattoni. For phytoplankton, the inventories carried out show the presence of 65 species belonging to 5 families (Chlorophycees, Diatomees, Dinophycees, Chrysophycees and Cyanophycees). An analysis of the frequency of occurrence of the various taxa shows that the characteristic species of Lake Manantali are Chlorophycees, with 7 species: Desmidium baileyi, Micrasterias alata, Sphaerocystis schroeteri, Spondylosium sp., Staurastrum heimii, Staurastrum subanchora, Staurodesmu

关键词： Inventory Fish Zooplankton Phytoplankton Diversity Manantali

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Hydrogeophysical and Structural Investigations Using VES: A Case Study of Dosso Region in the Southwestern Part of the Meso-Cenozoic Iullemmeden Basin (Southwestern Niger)

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Open Journal of Geology 2024年第1期14卷 50-80页

作者： Abdou Ali Ibrahim Huguette C. Emvoutou Alain Zanga Konaté Moussa Serigne faye Department of Life and Earth Sciences Ecole Normale Supérieure Université Abdou Moumouni Niamey Niger Department of Earth Sciences Faculty of Sciences University of Douala Douala Cameroon Department of Geology Faculty of Sciences and Techniques University Cheikh Anta Diop of Dakar Dakar Senegal Department of Geology Faculty of Sciences and Techniques Université Abdou Moumouni Niamey Niger

A regional study connecting geolelectrical surveys with geology and hydrogeology was carried out in the western part of the Iullemmeden basin, precisely in the Dosso region in Niger. One hundred and four (104) vertical electrical sounds have been realized, among them nineteen representative were thus be used as parametric surveys. The local resistivity values of the geological formations of Quaternary range from 100 Ω⋅m to 1000 Ω⋅m (sands and lateritic sandstones). The Oligo-Miocene formation of the Continental terminal (Ct) shows resistivity values ranging from 1 to 5 Ω⋅m (brackish groundwaters) to 1500 Ω⋅m (clay sandstones) while the Upper Cretaceous formation of the Continental “hamadien” (Ch) indicates values ranging from 20 Ω⋅m (sandy clay) to 5000 Ω⋅m (clayey sandstones). The geological formations of Paleocene have values from 2 Ω⋅m (marls) to 60 Ω⋅m (calcareous marl), while the Precambrian basement exhibits values of granite around 300 Ω⋅m to 60,000 Ω⋅m. The update of the structural settings reveals many faults in the study area which explain both the shape of the basin and the geometry of the aquifers. Tectonics is also consistent with the hydraulic characteristics of aquifers. In addition, brackish groundwaters were identified as perched aquifer groundwaters in different depths in Dosso region. They probably come from the marine brines during the regression of the Paleocene Sea.

关键词： Vertical Electrical Soundings Continental Terminal Continental “Hamadien” Brackish Groundwaters Iullemmeden Basin Dosso Region

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Infantile Spinal Muscular Atrophy at the Albert Royer National Children’s Hospital Center in Dakar

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Open Journal of Pediatrics 2024年第3期14卷 514-521页

作者： Guillaye Diagne Khadim Bop Sofiatou Dieye Arame faye Fatou Ly Amadou Lamine Fall Pediatrics Ward of Pikine Hospital Pikine Senegal Pé diatrics Ward of Albert Royer National Hospital Dakar Senegal

Introduction: Infantile spinal muscular atrophy (ISA) is an autosomal recessive disease caused by primary degeneration of cells in the anterior horn of the spinal cord, leading to muscle weakness and hypotonia. Its incidence is estimated at 1 in 6000 births worldwide. In Africa, particularly in Senegal, there are few studies interested on this pathology. We therefore deemed this study necessary, which set itself the objective of describing the diagnostic, therapeutic and progressive aspects of infantile spinal muscular atrophy at the Albert Royer National Children’s Hospital Center in Dakar (CHNEAR). Methodology: We conducted a retrospective descriptive study over a period of two (2) years from December 2020 to December 2022. Included were all hospitalized patients in whom the diagnosis of spinal muscular atrophy was made with or without genetic confirmation. The data were collected on a pre-established form then entered and analyzed with the following software: Excel 2013 and R version 4.1.3. Results: During our study period, 2100 children were hospitalized, the annual incidence was 0.76%. The average age of our patients was 9 ± 9 months with a range of 3 months to 32 months and the median was 6.5 months. The sex ratio was 7. The notion of family consanguinity was found in 62.5% of cases and the notion of ISA in the family in 25% of cases. Hypotonia and respiratory distress were found at the forefront in equal proportions (50% of cases). Electromyogram (EMG) was performed in 3 patients (37.5%). Symptomatic medical treatment was administered in 100% of patients, 04 patients had benefited from respiratory physiotherapy, i.e. 50% of cases, and genetic counseling was carried out in one patient (12.5%). The evolution was immediately favorable in 2 patients or 25% of cases, unfavorable in 75% of cases with a death rate of 50% and the average age of death was 5.5 months ± 1 with extremes ranging from 3 to 7 months. Conclusion: The number of Infantile spinal muscular atrop

关键词： Spinal Muscular Atrophy Child Hypotonia Dakar

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Enhancing Precision in Radiotherapy Delivery: Validating Monte Carlo Simulation Models for 6 MV Elekta Synergy Agility LINAC Photon Beam Using Two Models of the GAMOS Code

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World Journal of Nuclear Science and Technology 2024年第2期14卷 146-163页

作者： Nogaye Ndiaye Oumar Ndiaye Papa Macoumba faye Kodjo Joël Fabrice N’Guessan Djicknack Dione Khady Sy Moussa Hamady Sy Jean Paul Latyr faye Alassane Traoré Ababacar Sadikhe Ndao Institute of Applied Nuclear Technology University Cheikh Anta Diop Dakar Senegal International Cancer Center of Dakar Dakar Senegal Department of Physics Faculty of Sciences and Technology University Cheikh Anta Diop Dakar Senegal

The most crucial requirement in radiation therapy treatment planning is a fast and accurate treatment planning system that minimizes damage to healthy tissues surrounding cancer cells. The use of Monte Carlo toolkits has become indispensable for research aimed at precisely determining the dose in radiotherapy. Among the numerous algorithms developed in recent years, the GAMOS code, which utilizes the Geant4 toolkit for Monte Carlo simula-tions, incorporates various electromagnetic physics models and multiple scattering models for simulating particle interactions with matter. This makes it a valuable tool for dose calculations in medical applications and throughout the patient’s volume. The aim of this present work aims to vali-date the GAMOS code for the simulation of a 6 MV photon-beam output from the Elekta Synergy Agility linear accelerator. The simulation involves mod-eling the major components of the accelerator head and the interactions of the radiation beam with a homogeneous water phantom and particle information was collected following the modeling of the phase space. This space was po-sitioned under the X and Y jaws, utilizing three electromagnetic physics mod-els of the GAMOS code: Standard, Penelope, and Low-Energy, along with three multiple scattering models: Goudsmit-Saunderson, Urban, and Wentzel-VI. The obtained phase space file was used as a particle source to simulate dose distributions (depth-dose and dose profile) for field sizes of 5 × 5 cm2 and 10 × 10 cm2 at depths of 10 cm and 20 cm in a water phantom, with a source-surface distance (SSD) of 90 cm from the target. We compared the three electromagnetic physics models and the three multiple scattering mod-els of the GAMOS code to experimental results. Validation of our results was performed using the gamma index, with an acceptability criterion of 3% for the dose difference (DD) and 3 mm for the distance-to-agreement (DTA). We achieved agreements of 94% and 96%, respective

关键词： GAMOS Monte Carlo LINAC Radiotherapy Dose Distribution Phase Space Gamma Index 6 MV Photon Beam

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Lithostructural Control of the Gold Mineralization of the Douta Permit of African Star Resources (Kédougou-Kéniéba Inlier, Southeastern Senegal)

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International Journal of Geosciences 2024年第4期15卷 303-333页

作者： Masse Ndour Papa Moussa Ndiaye Koffi Félix Ekra Alain Ndong Malick faye Pierre Ndour African Star Resources Yoff Dakar S&#233n&#233gal Dé partement de G&#233ologie Universit&#233 Cheikh Anta Diop Dakar S&#233n&#233gal

The Douta permit of African Star Resources/Thor Explorations, located in the southeast of Senegal, in the Kédougou-Kéniéba Inlier (western part of the West African Craton), is dominated to the East by metasedimentary formations such as greywackes, shales, graphitic shales, quartzites, cherts, claystones and breccias characteristic of the Dialé-Daléma basin. To the West, the mafic formations of the Mako volcanic belt are the most common. Metasedimentary rocks are associated with metavolcanosedimentary terms found at the contact zones between the two (2) Birimian groups. These different geological formations are cut by mafic dolerite and gabbro sills and/or dykes, as well as quartz and microgranite veins. The Douta gold project is crossed from North to South by the MTZ (Main Transcurrent Zone), generally oriented NE-SW and becoming N-S towards the North. The permit is characterized by several shear corridors. The rocks are affected by brittle, brittle-ductile to ductile deformations. The gold mineralization is hosted by a NE-trending shear corridor called the Makosa corridor (Makosa shear zone), therefore sub-parallel to the MTZ. It has a subvertical dip (75˚ to 85˚ to the NW). It is associated with a hydrothermal phase characterized by quartz-sericite-epidote-fine, disseminated pyrite and arsenopyrite ± albite ± chlorite paragenesis. These minerals testify to the existence of a low degree of metamorphism (greenschist facies, epizonal domain) in the area. However, metamorphism reaches amphibolite facies in some places, particularly in the vicinity of intrusive bodies, with the presence of hornblende (amphiboles) and plagioclase. The gold mineralization is mainly hosted by two (2) metasedimentary lithological units: meta-greywackes and shales.

关键词： Douta Kédougou-Kéniéba Inlier Senegal Metasedimentary MTZ Control Gold Mineralization Makosa Corridor

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Humoral Response and Tolerance of Vaccination against SARS-CoV-2 in Adults Senegalese Patients Undergoing Hemodialysis: A Multicenter Prospective Study

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Open Journal of Nephrology 2024年第1期14卷 70-80页

作者： Lot Nehemie Motoula Latou Moustapha Mbow Modou Ndongo Gnagna faye Gora Lo Sidy Mohamed Seck Department of Nephrology and Dialysis Military Hospital of Ouakam Dakar Senegal Immunology Laboratory Military Hospital of Ouakam Dakar Senegal Department of Nephrology and Dialysis Regional Hospital of Kedougou Kedougou Senegal Department of Nephrology Idrissa Pouye General Hospital Dakar Senegal Bacterioloy and Virology Laboratory CMIA Dakar Senegal IRL-3189 ESS/UGB/CNRS/UCAD/CNRST/USTB Faculty of Health Sciences University Gaston Berger Saint-Louis Senegal

Introduction: Following the COVID-19 pandemic, vaccination has been proposed in several countries as the main preventive measure despite very limited data, particularly in dialysis patients. We conducted this study to assess the immunological response to vaccination in Senegalese hemodialysis patients. Patients and Methods: We conducted a prospective study, in two dialysis centers in Dakar from March 30th to August 30th, 2021 including patients on hemodialysis for >6 months, vaccinated against SARS-CoV-2 according to the vaccination schedule recommended by WHO. A vaccine response was considered positive when seroconversion was observed after one dose of vaccine. The clinical efficacy of immunization was defined as the absence of new COVID-19 infection in patients who received a complete vaccination. Results: Among the 81 patients included in the study, 7.4% had anti-Spike IgM antibodies before their first vaccination. Seroprevalence of IgM antibodies was 38.3% one month after the first vaccine dose (at M1) and 8.6% one month after the second dose (at M4). Anti-Spike IgG antibodies were present in 40.3% of patients before vaccination, in 90.1% at M1, and in 59.7% at M4. Among patients previously infected with SARS-CoV-2, 10.2% had IgM antibodies at M0, 31.6% at M1, and 10.5% at M4 post-vaccination. Similarly, seroprevalences of IgG antibodies in this subgroup were 31.5%, 61.3%, and 50.0% respectively at M0, M1, and M4 post-vaccination. A comparison of seroconversion rates between M0 and M4 showed significant differences only for IgG in COVID-19 naive patients. Mean duration in dialysis and the existence of previous COVID-19 infection were associated with patients’ vaccinal response after the two doses. Age, gender and the use of immunosuppressive treatment did not influence post-vaccinal antibody production. Conclusion: Vaccination against COVID-19 in Senegalese hemodialysis patients induced a low seroconversion rate but it was well tolerated. M

关键词： SARS-Cov2 Vaccination Humoral Response Tolerance Hemodialysis Senegal

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Velocity Form Calculations of Generalized Oscillator Strengths for 3s→ (3p, 4p, 5p, 6p) Dipole Transitions of Atomic Sodium in Debye Plasma

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Open Journal of Applied Sciences 2024年第6期14卷 1512-1529页

作者： Louis Gomis Clement Diatta Moustapha Sadibou Tall Ibrahima Gueye faye Rama Gomis Yande Diouf Mamadou Coulibaly Laboratoire de Physique des Plasmas et de Recherches Interdisciplinaires Departement de Physique Universite Cheikh Anta Diop Dakar Senegal

In this paper, the generalized oscillator strengths (GOSs) of excitations of atomic sodium from ground state to 2p63s0 (3p, 4p, 5p, 6p) states, immersed in Debye plasma, were calculated by using wavefunctions which were obtained numerically from the restricted Hartree-Fock (RHF) equation. This RHF equation employs the local density approach for exchange interactions including plasma Debye screening. Theoretical RHF and random phase approximation with exchange (RPAE) velocity calculations have shown that the GOSs for excitations to 3 s0(3 p,4 p,5 p,6 p)depend on the plasma Debye screening effects, as shown by the reduction in the GOS amplitude with decreasing Debye length λD. The agreement between the present RPAE V results for the transitions 3 s→3 s0(3 p,4 p,5 p)and the length calculations of Martínez-Flores was satisfactory. Correlation effects were found quite to be significant in the vicinity of the maxima of the GOS of the 3 s→3 s0(4 p,5 p,6 p)excitations by using the RPAE V approach. We note the poor influence of many electron correlations on the GOS of (3 s→3 p)transition with the same principal quantum number. Finally, we comment that the RPAE V calculations are useful in investigating electron correlation effects on the transition GOS of atomic sodium planted in Debye plasma. The present velocity results also reveal that the 3 s→3 s0(5p, 6p)transition GOSs tend to be delocalized due to more significant screening effects at Debye lengths λD=20and 30 a.u. for excited subshells 5p and 6p, respectively. We report here novel results of GOS for 3 s→3 s06ptransition obtained from different Debye lengths.

关键词： Plasma Screening Effect Correlation Effect Sodium Atomic Velocity Form GOS Restricted Hatree-Fock Random Phase Approximation with Exchange

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