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Non-Malformative Emergency Abdominal Surgery in Children Aged 0 - 5 Years

Surgical Science 2021年第7期12卷 211-217页

作者： Lassey James Didier Harissou Adamou Oumarou Habou Ousseini Adakal Kadi Ide Younssa Hama Ibrahim Amadou Magagi Moussa Gagara maman bachir abdoulaye Rachid Sani Department of Surgery and Surgical Specialties National Hospital of Niamey Faculty of Health Sciences of the UAM Niamey Niger Department of Surgery and Surgical Specialties Zinder National Hospital Faculty of Health Sciences of the University of Zinder Zinder Niger Department of Anesthesia Resuscitation and Emergencies Niamey National Hospital Niamey Niger Department of Surgery and Surgical Specialties Faculty of Health Sciences of the University of Maradi Niamey Niger

Childhood abdominal surgery emergencies are a major challenge and problematic for the surgeon. The objective is to assess the pattern of non-malformative emergency abdominal surgery in children under 5 years old and to evaluate their management. Patients and Methods: A retrospective study of children under five years of age operated between January 2015 and December 2019 who presented with non-malformative abdominal surgical emergency at the Niamey National Hospital. Results: We collected 327 patients aged 0 to 5 years who underwent surgery for abdominal emergency. The average age was 2.8 ± 0.7 years. Boys accounted for 70.64% (n = 231) of the cases. Non-traumatic emergencies accounted for 97% (n = 317) of the cases. They were dominated by peritonitis in 44.6% (n = 146) and strangulated hernia in 43.7% (n = 143). Peritonitis was attributed to ileal typhoid perforation in 85.61% (n = 125) cases. The strangulated hernias were umbilical at 87.41% (n = 125) and inguinal at 12.59% (n = 18). Abdominal trauma accounted for 3% (n = 10);including 6 cases of abdominal contusion and 4 cases of penetrating wound. Intestinal resection with or without stoma was performed in 28.44% (n = 93). Postoperative complications were observed in 8.5% (n = 28) of the cases and mortality was 5.5% (n = 18). Conclusion: Non-malformative emergency abdominal surgery for children under 5 years was dominated by peritonitis. The morbidity and mortality are high. Fight against disease due to dirty hands and fecal peril like such as typhoid fever will reduce their frequency, but also improve the prognosis.

关键词： Surgical Abdominal Emergencies—Peritonitis Child Prognosis Niger

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Outcomes of Thyroid Surgery at Niamey National Hospital

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Surgical Science 2021年第7期12卷 218-225页

作者： Lassey James Didier maman bachir abdoulaye Ousseini Adakal Harissou Adamou Adama Saidou Ibrahim Amadou Magagi Kadi Idé Moussa Gagara Maarouf Malam Taher Sidibé Rachid Sani Department of Surgery and Surgical Specialties National Hospital of Niamey Faculty of Health Sciences of the University Abdou Moumouni Niamey Niger Department of Surgery and Surgical Specialties Faculty of Health Sciences of the University of Maradi Maradi Niger Department of Surgery and Surgical Specialties Zinder National Hospital Faculty of Health Sciences of the University of Zinder Zinder Niger Department of Anesthesia Intensive Care and Emergencies Niamey National Hospital Niamey Niger Maternity Issaka Gazobi Gynecology and Obstetrics Services Niamey Niger Radiology Department at Niamey National Hospital Niamey Niger

Introduction: Goiter is the most common endocrine disease in the world. The objective of our study is to assess and compare the morbidity linked to the surgical management of goiters and thyroid tumors in the general surgery department of the Niamey National Hospital. Result: We collected data on a prospective basis on 112 cases having undergone a thyroidectomy between March 2019 and April 2020. The female sex is predominant with 96.4%, i.e. a sex ratio of 0.037. The average age is 41.2 years with extremes ranging from 22 to 72 years old. The average duration of evolution of goiter is 7.5 years with extremes ranging from 5 months to 20 years old. The first reason for consultation is anterior cervical swelling. TSH testing confirmed euthyroidism in 107 patients (95.5%). Therapeutically, loboisthmectomy is the most performed procedure with 43.7%. The postoperative hormonal assessment revealed 32% hypothyroidism at 6 months, with a significant difference for cases of total thyroidectomy. The occurrence of postoperative hypocalcemia was significantly greater after total and subtotal thyroidectomy. There is no significant difference in terms of recurrent complications. Conclusion: Thyroidectomies must be performed after adequate preparation and information to the patient on possible postoperative complications, hence the need for close medical monitoring immediately and remotely.

关键词： Goiter Thyroidectomy Complications Niamey Niger

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Preliminary Study of Chemical Elements Distribution in Petroleum Source Rocks Donga and Yogou Formations of the Termit Sedimentary Basin (Est-Niger)

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Journal of Minerals and Materials Characterization and Engineering 2024年第1期12卷 49-62页

作者： Alassane Ibrahim maman bachir abdoulaye Dan Makaou Oumarou Baraou Idi Souley Kouakou Alponse Yaou Abdoulwahid Sani Department of Fossil Energy University of Agadez (UAZ) Agadez Niger Civil Engineering Geosciences and Geographic Sciences Laboratory Institut National Polytechnique Félix Houphou&#235t Boigny (INP-HB) Yamoussoukro C&#244te d’Ivoire Department of Geology University of Agadez (UAZ) Agadez Niger

XRF and EDX analyses were carried out on 18 batches of representative raw samples to determine the distribution of major chemical elements in the petroleum source rocks of Donga and Yogou formations of Termit sedimentary basin. The chemical composition of these formations is dominated by silicon (Si), aluminum (Al) and iron (Fe). This is consistent with the oxide composition, which is also dominated by silicon oxide (SiO2), aluminum oxide (Al2O3) and iron monoxide (FeO). No less important chemical elements are calcium (Ca), potassium (K), sulfur (S), titanium (Ti), magnesium (Mg), manganese (Mn) and barium (Ba), as well as some of their oxides. All these major chemical elements are carried by silicate detrital minerals associated with pyrite and goethite and/or clay minerals such as kaolinite and interstratified illite, smectite and chlorite. This trend is illustrated by the values of the Si/Al and SiO2/Al2O3 ratios.

关键词： Distribution Major Elements Source Rocks Donga Formation Yogou Formation Termit Basin

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Study on the Safety and Prevention Technology of Coal Mining under the River in Xingyuan Coal Mine

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Open Journal of Geology 2024年第3期14卷 339-402页

作者： abdoulaye Sylla Wenbing Guo School of Energy Science and Engineering Henan Polytechnic University Jiaozuo China

Coal mining-induced surface subsidence poses significant ecological and infrastructural challenges, necessitating a comprehensive study to ensure safe mining practices, particularly in underwater conditions. This project aims to address the extensive impact of coal mining on the environment, infrastructure, and overall safety, focusing on the Shigong River area above the working face. The study employs qualitative and quantitative analyses, along with on-site engineering measurements, to gather data on crucial parameters such as coal seam characteristics, roof rock lithology, thickness, water resistance, and structural damage degree. The research encompasses a multidisciplinary approach, involving mining, geology, hydrogeology, geophysical exploration, rock mechanics, mine surveying, and computational mathematics. The importance of effective safety measures and prevention techniques is emphasized, laying the foundation for research focused on the Xingyun coal mine. The brief concludes by highlighting the potential economic and social benefits of this project and its contribution to valuable experience for future subsea coal mining.

关键词： Coal Mining-Induced Surface Subsidence Ecological and Infrastructural Challenges Safe Mining Practices Underwater Conditions Multidisciplinary Approach Safety Measures Prevention Techniques

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Analysis of the Effect of Temperature and Relative Humidity on the Reliability of a Photovoltaic Module

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Advances in Materials Physics and Chemistry 2024年第8期14卷 165-177页

作者： abdoulaye Kabré Dominique Bonkoungou Zacharie Koalaga Dpartement de Physique Laboratoire de Matriaux et Environnement (LA.M.E)-UFR/SEA Universit Joseph Ki-ZERBO Ouagadougou Burkina Faso

Photovoltaic energy occupies a significant place in the renewable energy market, with photovoltaic (PV) modules playing a vital role in converting solar energy into electricity. However, their effectiveness is likely to be affected by variations in environmental conditions, including temperature and relative humidity. The study examines the impact of these major climatic factors on the reliability of PV modules, aiming to provide crucial information for optimizing and managing these systems under varying conditions. Inspired by Weibull’s law to model the lifespan of components, we proposed a mathematical model integrating a correction factor linked to temperature and relative humidity. Using this approach, simulations in Matlab Simulink reveal that increasing temperature and relative humidity have an adverse impact on the reliability and lifespan of PV modules, with a more pronounced impact on temperature. The results highlight the importance of considering these environmental parameters in the management and optimization of photovoltaic systems to ensure their long-term efficiency.

关键词： Solar Energy PV Module Lifespan Reliability Efficiency

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Performance Evaluation of Two Series Vertical Flow Filters for Wastewater Treatment: A Case Study of the Prototype Installed at Gaston Berger University, Saint-Louis, Senegal

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Open Journal of Modern Hydrology 2024年第1期14卷 14-32页

作者： Abdou Khafor Ndiaye Falilou Coundoul abdoulaye Deme Antonina Torrens Armengol abdoulaye Senghor UFR of Applied Sciences and Technology Gaston Berger University of Senegal Saint-Louis Senegal Polytechnic Institute of Saint-Louis (IPSL) Gaston Berger University of Saint-Louis Saint-Louis Senegal UFR of Applied Sciences and Technology Gaston Berger University Saint-Louis Senegal Department of Biology Healthcare and Environment Faculty of Pharmacy and Food Sciences University of Barcelona Barcelona Spain Sanitation Department Ministry in Charge of Sanitation of Senegal Dakar Senegal

This paper evaluates the efficacy of two sequential vertical flow filters (VFF), FV1 and FV2, implanted with Typha, in a pilot-scale wastewater treatment system. FV1 comprises three cells (FV1a, FV1b, and FV1c), while FV2 consists of two cells (FV2a and FV2b), each designed to reduce various physicochemical and microbiological pollutants from wastewater. Quantitative analyses show significant reductions in electrical conductivity (from 1331 to 1061 μS/cm), biochemical oxygen demand (BOD5 from 655.6 to 2.3 mg/L), chemical oxygen demand (COD from 1240 to 82.2 mg/L), total nitrogen (from 188 to 37.3 mg/L), and phosphates (from 70.9 to 14.6 mg/L). Notably, FV2 outperforms FV1, particularly in decreasing dissolved salts and BOD5 to remarkably low levels. Microbiological assessments reveal a substantial reduction in fecal coliforms, from an initial concentration of 7.5 log CFU/100mL to 3.7 log CFU/100mL, and a complete elimination of helminth eggs, achieving a 100% reduction rate in FV2. The study highlights the impact of design parameters, such as filter material, media depth, and plant species selection, on treatment outcomes. The findings suggest that the judicious choice of these components is critical for optimizing pollutant removal. For instance, different filtration materials show varying efficacies, with silex plus river gravel in FV1c achieving superior pollutant reduction rates. In conclusion, VFFs emerge as a promising solution for wastewater treatment, underscoring the importance of design optimization to enhance system efficiency. Continuous monitoring and adaptation of treatment practices are imperative to ensure water quality, allowing for safe environmental discharge or water reuse. The research advocates for ongoing improvements in wastewater treatment technologies, considering the environmental challenges of the current era. The study concludes with a call for further research to maximize the effectiveness of VFFs in water management.

关键词： Phytoremediation Phytopurification Plant-Based Purifier Wastewater Treat-ment Vertical Flow Filters Pollutant Reduction Typha Physicochemical Analysis Microbial Removal

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Performance of a Horizontal Flow Constructed Reed Bed Filter for Municipal Wastewater Treatment: The Case Study of the Prototype Installed at Gaston Berger University, Saint-Louis, Senegal

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Natural Resources 2024年第1期15卷 1-16页

作者： Abdou Khafor Ndiaye Falilou Coundoul abdoulaye Deme Antonina Torrens Armengol abdoulaye Senghor UFR of Applied Sciences and Technology Gaston Berger University of Senegal Saint-Louis Senegal Polytechnic Institute of Saint-Louis (IPSL) Gaston Berger University of Saint-Louis Saint-Louis Senegal Department of Biology Healthcare and Environment Faculty of Pharmacy and Food Sciences University of Barcelona Barcelona Spain Sanitation Department Ministry in Charge of Sanitation Dakar Senegal

In Saint-Louis, Senegal, a constructed wetland with horizontal flow reed beds (FHa and FHb) has demonstrated significant efficacy in treating municipal wastewater. Analyzing various treatment stages, the system showed only a slight temperature variation, from an influent average of 26.3°C to an effluent of 24.7°C. Electrical conductivity decreased from 1331 mS/cm to 974.5 mS/cm post-primary treatment, with suspended solids (SS) dramatically reduced from 718.9 mg/L to 5.7 mg/L in the final effluent. Biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) saw a notable decrease, from initial levels of 655.6 mg/L and 1240 mg/L to 2.3 mg/L and 71.3 mg/L, respectively. Nitrogenous compounds (N-TN) and phosphates () also decreased significantly, indicating the system’s nutrient removal capacity. Microbiological analysis revealed a reduction in fecal coliforms from 7.5 Ulog/100ml to 1.8 Ulog/100ml and a complete elimination of helminth eggs. The presence of Phragmites and Typha was instrumental in enhancing these reductions. The system’s compliance with the Senegalese standards for disposal into natural environments, WHO recommendations for unrestricted water reuse in irrigation, and the European legislation for water reuse was established. The effluent quality met the stringent criteria for various classes of agricultural reuse, illustrating the system’s potential for sustainable water management. This wetland model presents a robust solution for water-stressed regions, ensuring environmental protection while supporting agricultural needs. The study calls for ongoing research to further refine the system for optimal, reliable wastewater treatment and water resource sustainability.

关键词： Constructed Wetlands Horizontal Flow Reed Beds Wastewater Treatment Phragmites and Typha Plants Physicochemical Pollutant Removal Microbiological Indicators Fecal Coliforms and Helminth Eggs Water Quality Improvement Senegal Water Reuse Standards Sustainable Water Management Agricultural Irrigation Reuse Nutrient Removal Efficiency Environmental Engineering Ecological Sanitation Systems

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Fruit Powder of Tetrapleura tetraptera in Local Feed on Some Zootechnical Performances of Juveniles of Clarias gariepinus in Concrete Tank

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Open Journal of Animal Sciences 2024年第2期14卷 56-69页

作者： Ngouana Tadjong Ruben abdoulaye abdoulaye Kana Jean Raphaël Téguia Alexis Laboratory of Aquaculture and Demography of Fisheries Resources Aquaculture Department Institute of Fisheries and Aquatic Science of Yabassi University of Douala Douala Cameroon Laboratory of Animal Nutrition Department of Animal Science Faculty of Agronomy and Agricultural Sciences University of Dschang Dschang Cameroon

This study focused on the supplementation of four-sided spice fruit powder (Tetrapleura tetraptera) on some zootechnical performances of juveniles of Clarias gariepinus and was carried out from February 14 to July 20 at the Massoma Fish Farm of Bojongo Mbeidi located in the Littoral Region, Department of Wouri, Douala IV district. The farm benefits from a climate favorable to aquaculture activity. For this purpose, five (5) treatments were tested including T0+ (imported feed), T0-, T0.3, T0.4, and T0.5 respectively for the treatments with 0% supplemented food;0.3%;0.4% and 0.5% of Tetrapleura tetraptera powder. A total of 450 Clarias gariepinus fry with an initial average weight of 7 ± 1.5 g, were distributed in happas of 0.49 m2 each placed in Triplicate in a completely randomized device. Four isoprotein foods with 38% crude protein were formulated to feed these fry at 7% of their biomass per day for 15 days then to their fullness until the end of the experiment. Intermediate fishing was carried out every fortnight. 75 days later, the results recorded show that the highest average survival rate (96.44% ± 3.5%) was recorded with the subjects fed feed supplemented with 0.4% T. tetraptera powder. The average weight (120.93 ± 67.20), weight gain (113.93 ± 67.20), specific growth rate (3.64 ± 0.79% g/d) and total lengths and standard (26.43 ± 1.9 and 23.66 ± 1.76) the highest were recorded with the T0+ treatment (imported feed). The highest conditioning factor K (2.14 ± 0.15) was recorded with the treatment supplemented with 0.4% T. tetraptera. The lowest conversion ratio (1.28) was recorded with the treatment fed with imported blue crown food (T0+). Furthermore, the lowest production cost was recorded with the treatment supplemented with 0.4% T. tetraptera. It appears from this study that the juveniles of C. gariepinus better value the feed substituted with 0.4% of the powder of fou

关键词： Tetrapleura tetraptera Local Feed Zootechnical Performance Juvenile of Clarias gariepinus

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Food Security in Developing Countries: Factors and Mitigation

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American Journal of Climate Change 2024年第3期13卷 391-405页

作者： Hellen Abbo Owasa abdoulaye Fofana Fall African Center of Excellence in Agroecology and Livelihood Systems Uganda Martyrs University Kampala Uganda Department of Plant Biology Cheikh Anta Diop University of Dakar (UCAD) Dakar Senegal National Laboratory for Research on Plant Production (LNRPV) Senegalese Agricultural Research Institute (ISRA) Dakar Senegal

Since 1976, eradicating hunger has become one of the priority objectives of the United Nations, which is included in the Charter of Human Rights;the right to get adequate food. The qualification of food security in time and space must analyze not only the three components it covers but also the relationships that these three components maintain. Climate change contributes to food insecurity, but it is not the only factor. To address food insecurity in various forms, greater food security must be combined with improved sustainable agricultural practices with minimal strain on the environment. This review of literature insists on the principles of food security, which in particular allows a better understanding of food insecurity in developing countries and favors a greater contribution of agriculture and food systems in general to nutritional progress.

关键词： Food Security Developing Countries Climate Change

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Petrographic and Geochemical Characters of Granites of the Banfora Belt, Burkina Faso (West Africa)

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International Journal of Geosciences 2024年第9期15卷 682-697页

作者： abdoulaye Ouedraogo Seta Naba Hermann Ilboudo Laboratoire Gosciences et Environnement (LaGE) Dpartement des Sciences de la Terre Unit de Formation et de Recherche en Sciences de la Vie et de la Terre Universit Joseph KI-ZERBO Ouagadougou Burkina Faso Bureau des Mines et de la Gologie du Burkina (BUMIGEB) Ouagadougou Burkina Faso

The Banfora’s birimian greenstones belt is located in the western part of Burkina Faso (west Africa). Recent petrographic and lithogeochemical studies have highlighted plutons intruding the metasedimentary and metavolcanic series. These plutonic rocks are composed of leucogranites belonging to the so-called Ferkessedougou’s or Ferké’s batholith, granites, granodiorites, monzodiorites and quartz monzonites. From the lithogeochemical studies, these plutonic rocks have a calc-alkaline and peraluminous character. The rare earth elements spectra of the Ferké’s leucogranites let distinguished two sub-facies. One of the sub-facies is composed of quartz monzonite to granite, while the other is granitic sensu stricto. However, all these plutonic rocks were emplaced in a geodynamic context of subduction followed by collision.

关键词： Burkina Faso Banfora Greenstones Belt Plutons Geodynamic Context Subduction

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