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Open Journal of Metal 2021年第1期11卷 1-10页

作者： Faye Mamadou Sambe Falilou Mbacké Diop El Hadji Moussa toure alpha ousmane Mbaye Fall Aminata Diop Mar Codou Guèye Laboratory of Electrochemistry and Membrane Process Ecole Supérieure Polytechnique Cheikh Anta Diop University Dakar Senegal Quality Control Analysis Laboratory of the Senegalese Water Company (SWC) Dakar Senegal

The goal of this topic is a synthesis of the main characteristics of iron in groundwater and the oxidation process used to remove it. Indeed, the kinetics of chemical oxidation of iron (II) was examined with reconstituted water (distilled water + iron sulphate) and proceeded to the application in the groundwater samples taken from South Pout (Senegal) precisely in the drilling PS2. The sources of iron are natural or anthropogenic. In Senegalese waters, its content is variable and sometimes exceeds the standards of potability. Despite the diversification of iron removal process, chemical oxidation is the most used solution in drinking water treatment plants in Senegalese rural areas. Applied oxidation processes such as aeration and chlorination, however, are insufficient to produce drinking water with an iron concentration in accordance with standards of potability.

关键词： Iron Kinetics Chemical Oxidation Groundwater Drilling

Epidemiological and Hemato-Biochemical Profiles of Diabetic Patients at the Diabetology, Endocrinology, and Metabolic Diseases Department of the alpha Oumar Diallo Regional Hospital, Kindia (Republic of Guinea)

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Journal of Diabetes Mellitus 2024年第2期14卷 108-121页

作者： Fatoumata Bah Cé Camara ousmane Sangare Elhadji Saidou Balde Karamo toure Taliby Dos Camara Mariama Kourouma César Hagassou Biology Laboratory Department of Biology Faculty of Sciences Gamal Abdel Nasser University Conakry (Commune of Dixinn) Guinea Higher School of Tourism and Hospitality of Guinea Conakry Guinea Faculty of Pharmaceutical and Medical Sciences Gamal Abdel Nasser University Conakry Guinea

This study aims to enhance the healthcare services for diabetic patients in the administrative region of Kindia by suggesting dietary interventions to assist diabetics in better managing their condition. Conducted over a period of six months, from February 18 to July 18, 2021, this prospective and descriptive cross-sectional study involved 220 diabetic patients. Among these, 48 patients (22%) maintained balanced glucose levels (2 g/l). Positive glycosuria was observed in 54% of the patients, whereas 46% demonstrated normal glycosuria. An analysis of urinary parameters revealed that 15% of the patients had abnormal Ketone Bodies. Normal HbA1c levels (9%) HbA1c levels. Hematological assessments indicated significant variation: 56% of the patients had low hemoglobin levels, 4% suffered from hyper-eosinophilia, and 1% each from hyper-basophilia and hyper-hemoglobinemia. The anemic profile was characterized as mild anemia in 75%, moderate anemia in 20%, and severe anemia in 5%. Furthermore, 25% of patients were affected by Microcytic anemia and 75% by Normocytic anemia. Demographically, women constituted 65% of the study group compared to 35% of men. The most represented age bracket was 41 to 60 years, accounting for 52% of the patients, while those between 61 and 80 years comprised 36%. Every district in Kindia was impacted by diabetes.

关键词： Epidemiology Diabetes Glucose Levels Glycosuria Metabolic Disorders Kindia

Modelling and Response Surface Optimisation of Methyl Violet Removal by a Mixture of Titaniferous Sand and Non-Activated Attapulgite

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Journal of Materials Science and Chemical Engineering 2022年第9期10卷 10-26页

作者： Kalidou Ba alpha ousmane toure Mouhamed Ndoye Falilou Mbacke Sambe Laboratory of Water Energy Environment and Industrial Processes (LE3PI) ESP-UCAD Cheikh Anta Diop University Dakar Senegal

In recent years, the discharge of dye-laden effluents from the textile industries into the aquatic environment has increased considerably. These industries are among the largest consumers of water. They generate huge amounts of pollutants from their huge discharge of toxic effluents and pose serious public health problems. So, this study focuses on the use of the mixture of titaniferous sand and attapulgite for the removal of methyl violet by adsorption in discontinuous mode. The different adsorbents were characterized by X-ray fluorescence spectroscopy and their different physico-chemical properties such as pH, zero charge potential, bulk and absolute density, porosity and specific surface area were determined. The response surfaces, through the Box-Behnken model, were used to model and optimize the operating conditions. The different factors studied were the ratio of titaniferous sand and attapulgite, the initial concentration of methyl violet and the pH. These vary between 1.25 and 8, 20 and 100 mg/L, 4 and 10 respectively. The results obtained after statistical analysis of the data show that the optimum mixture ratio is 2, the optimum concentration is 99.92 mg/L and the optimum pH is 9.88 corresponding to a maximum capacity of 5.52 mg/g and a maximum removal efficiency of 99.56%. The study of the effects of the different factors showed that the initial concentration of methyl violet and the pH significantly influence the adsorption capacity and the removal efficiency of the dye.

关键词： Adsorption Surface Response Titaniferous Sand Attapulgite Methyl Violet

Modelling and Optimisation of Copper Adsorption in Solution by the Response Surface Method

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Advances in Chemical Engineering and Science 2023年第1期13卷 36-49页

作者： Kalidou Ba alpha ousmane toure Samba Ndiaye Moussa Diop Falilou Mbacke Sambe Laboratory of Water Energy Environment and Industrial Processes (LE3PI) Higher Polytechnic of Dakar (ESP) Cheikh Anta Diop University (UCAD) Dakar Senegal

Copper is considered a heavy metal that can be toxic at certain concentrations and its presence in water is a potential threat to public health. These heavy metals also contribute to a remarkable degradation of the environment, hence the need for effective treatment methods to remove them. In this study, a mixture of titaniferous sand and calcium silicate was used as adsorbent material to eliminate copper in solution. The calcium silicate was synthesised from fluosilicic acid, which is a by-product of phosphoric acid manufacture. The titaniferous sand is a residue from a mining industry. Both adsorbents were characterised by infrared spectroscopy and X-ray fluorescence to determine their compositions and physicochemical properties. The response surfaces, through the Box-Behnken model, were used to model and optimise various adsorption parameters, namely initial copper concentration (A: 60 - 200 mg/L), adsorbent dose (B: 0.1 - 0.6 g) and pH (C: 4 - 10). The copper removal efficiency (98.92%), after statistical analysis, was obtained under the following optimal conditions: an adsorbent dose of 0.55 g, an initial copper concentration of 197.25 mg/L and a pH of 9.85. The study of the effects of the operating parameters showed that they had a positive effect on the copper removal efficiency.

关键词： Adsorption Calcium Silicate Copper Response Surface Titaniferous Sand

Compliance of Magnetic Resonance Imaging Examination Requests at the Diagnostic Center of the National Social Security Fund of Conakry

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Open Journal of Radiology 2023年第1期13卷 58-66页

作者： ousmane Aminata Bah Aminata Sakho alpha Abdoulaye Balde alpha Issiaga Barry Kaba Mohamed Douty Aboubacar toure Armed Forces Reference Imaging Center (CIRA) Conakry Guinea Faculty of Health Sciences and Techniques Gamal Abdel Nasser University of Conakry Conakry Guinea Diagnostic Center of the National Social Security Fund (CNSS) Conakry Guinea

Introduction: MRI is a rapidly growing technique with more and more indica-tions and requests in the Republic of Guinea. Its correct prescription is a guar-antee for the satisfaction of the actors, both prescribers, radiologists and pa-tients. The main objective of this study was to evaluate the compliance of MRI examination requests at the Diagnostic Center of the National Social Se-curity Fund (CNSS) in Conakry. Material and Methods: This was a descriptive cross-sectional study of MRI prescription forms sent to the MRI unit of the CNSS Diagnostic Center from February 1 to May 1, 2021. The 8 compliance criteria established by the French High Authority for Health were used to evaluate the compliance of the examination requests. Results: A total of 7003 examination forms were sent to the facility, including 7% (n = 468) of MRIs. 56.2% of MRI requests were performed by specialists. We observed an overall compliance of 10%. Administrative and clinical compliance were missing in 24% and 38%, respectively. More specifically, the purpose of the examination was not mentioned in 60%, followed by the requesting department in 48.1% and the patient’s age in 35.1%. Conclusion: This study allowed us to highlight the gaps in establishing MRI requests. It would be important to organize an awareness campaign for prescribers on the usefulness of correctly filling an MRI request and to design templates to be filled out by prescribers.

关键词： CNSS Compliance Conakry Exams MRI

Solar Photocatalysis of A Pesticide in A Tubular Reactor on Titaniferous Sand as A New Semi-Conductor

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Advances in Chemical Engineering and Science 2023年第2期13卷 119-131页

作者： El Hadji Moussa Diop Kalidou Ba Mamadou Faye alpha ousmane toure Falilou Mbacké Sambe Water Energy Environment and Industrial Processes Laboratory (LE3PI) Higher Polytechnic/Cheikh Anta Diop University Dakar Senegal School of Industrial and Biological Engineering Dakar Senegal

This present study comes in addition to overcome the problems of separation of fine particles of TiO2 in heterogeneous photocatalysis after treatment. It aims to show the potential for using titaniferous sand as a new semiconductor under solar irradiation. The photocatalytic efficiency of this titaniferous sand was tested on a pesticide (Azadirachtin). A tubular photocatalytic reactor with recirculation of the polluting solution was designed for the elimination of the pesticide in an aqueous solution. Before its use as a photocatalyst, the titaniferous sand has undergone a specific treatment that consists of calcination at 600℃ followed by extraction of the calcined natural organic materials, which can interfere with the measurement of analytical parameters such as COD. The titaniferous sand was also characterized by X-ray fluorescence spectroscopy (XRF). XRF analyses have shown that TiO2 is predominant in the titaniferous sand with a percentage that has been estimated at 46.34%. The influence of various experimental parameters such as the flow rate of the polluting solution, the concentration of titaniferous sand, the presence of oxygen and the intensity of the overall rate of sunshine, was studied to optimize the photocatalytic degradation of the pesticide. The results showed that the highest removal rate (70%) was observed under the following conditions: a pH of 6, a titaniferous sand concentration of 150 g/L, a flow rate of 0.3 mL/min, and a sunshine rate of 354 W/m2 and in the presence of atmospheric oxygen. Under these experimental conditions, the rate of photodegradation of the pesticide follows the pseudo first order kinetic model of Langmuir Hinshelwood with a coefficient of determination R2 of 0.9869 and an apparent rate constant of 0.0029 min-1. The results clearly demonstrated the potential of titaniferous sand as a photocatalyst sensitive to sunlight for the effective removal of pesticides in the aq

关键词： Solar Energy Heterogeneous Photocatalysis Sand Titaniferous Titanium Dioxide Pesticide

Process for the Biological Removal of Fe (II) from Reconstituted Waters on a Support of Filter Material with Coated Jujube Seeds

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Journal of Geoscience and Environment Protection 2022年第12期10卷 65-76页

作者： Mamadou Faye Falilou Mbacké Sambe alpha ousmane toure Mouhamed Ndoye Codou Guèye Mar Diop Water Energy Environment and Industrial Processes Laboratory Ecole Supérieure Polytechnique (ESP) Dakar Senegal Cheikh Anta Diop University Dakar Senegal

Three beakers for removing Fe (II) in reconstituted water (doped with FeSO4) were built and tested. Given the set operating conditions ([O2] > 4 mg·L-1, Patm = 1.013 bar, T = 25°C ± 1°C and [Fe2+]0 = 0.5 to 2 mg·L-1), removal of iron was caused by biological and possibly physical and chemical oxidation because there is a quantity of free oxygen in the medium. The extent of each type of oxidation has not been evaluated as it specifically studies the biological degradation of iron in these beaker tests by setting the operating conditions (pH > 6.5, dissolved oxygen from 0 to 8 mg·L-1, Redox Potential from 100 to 400 mV). The experimental studies focused particularly on the measurements of maximum wavelength, conversion efficiencies from Fe (II) to Fe (III), the effect of the Fe (II) concentration, the influence of pH, the action of the temperature of the prepared solutions and the effect of O2 concentration under specified operating conditions. It noticed precipitated amounts of iron deposited at the bottom of the beakers. Thus, the low concentrations of Fe (II) detected in the influent after the biological oxidation operation could be attributed to microorganisms that consume iron as a substrate.

关键词： Biofilm Batch Test Biological Oxidation Iron Removal Beaker Doped Water

Isolated Superior Mesenteric Vein Thrombosis in Acute Pancreatitis: A Case Report

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Case Reports in Clinical Medicine 2015年第7期4卷 250-252页

作者： alpha Oumar toure ousmane Ka Ibrahima Ka Mamadou Seck ousmane Thiam Mohamadou Lamine Gueye Ibrahima Konate Mamadou Cisse Madieng Dieng Abdarahmane Dia Cheikh Tidiane toure Service de Chirurgie Générale et Digestive CHU Aristide Le Dantec Dakar Sénégal

The most common vascular complication of acute pancreatitis is thrombosis of the splenic vein. Isolated thrombosis of the superior mesenteric vein is rare and may lead to mesenteric ischemia and bowel infarction. We report the case of a 39 years old patient received for acute pancreatitis with a Ranson score less than 3 and image scanner for a grade C of Balthazar and a superior mesenteric vein thrombosis. The outcome was favorable with improvement of symptoms under medical treatment including anti-coagulant therapy. The contrast enhancing abdominal CT showed an absence of superior mesenteric thrombosis.

关键词： Pancreatitis Superior Mesenteric Vein Thrombosis Anti-Coagulant

Perineal rectosigmoidectomy for strangled rectal prolapse:A case report

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Case Reports in Clinical Medicine 2014年第1期3卷 64-66页

作者： alpha Oumar toure Cheikh Tidiane Diop Fode Baba toure Thomas Marcel M.Wade Gabriel Ngom Department of General Surgery Regional Hospital of OurossoguiOurossoguiSenegal Department of Pediatric Surgery Aristide Le Dantec HospitalDakarSenegal

Strangled rectal prolapse, the rare disease, is a proctological emergency. Its management is controversial. When it is not reducible and signs of ischemia are present, the Altemeierperineal rectosigmoidectomy remains the best treatment. This study aimed to report our experience on the management of strangled rectal prolapse about 1 case in a 45-year-old man, a holder of a rectal prolapse for 2 years. On admission, he had strangled prolapse for 24 hours with edema. After a vain attempt of manual reduction and installation of necrosis after 48 hours, he had an Altemeier rectosigmo?dectomy. The postoperative course was uneventful and the patient was discharged on the 6th postoperative day. The results were very good, after one year follow-up.

关键词： Strangled Rectal Prolapsed Altemeier Rectosigmoidectomy

Aging Experiences among Older People in Conakry/Guinea: Towards an Age-Friendly City and Community

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Advances in Aging Research 2023年第4期12卷 67-86页

作者： Mamadou Dioulde Balde alpha Oumar Sall Tiany Sidibe Madeleine toure Ramata Diallo Aissatou Diallo Sadan Camara Center for Research in Reproductive Health in Guinea (CERREGUI) Conakry Guinea

Older people are a demographically significant group, who represent a vulnerable layer within conditions for active and healthy aging that may be lacking in both urban and rural areas. Objective: To identify the main barriers and opportunities for the establishment of age-friendly cities and communities in a low-income country. Methods: This was a qualitative study that involved focus group discussions with older people, and service providers (health and social services) in the city of Conakry. The older people were purposively selected with the support of older people associations, and men and women were equally represented in the sample. Results: The analysis focused on the experience of old age as well as the barriers and opportunities for active healthy aging specific to the sub-Saharan context. The results indicate that a good quality of life for older adults boils down to the acquisition of good health and decent housing. Other concerns frequently reported were food and education problems for their children and security. Conclusion: This study contributes to strengthening the understanding of the age-friendly cities and communities’ approach in the context of sub-Saharan African countries.

关键词： Older People Age-Friendly Cities and Communities Barriers Opportunities Conakry