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Restoration or Rehabilitation of the Faleme River Affected by Mining Activities: What Methods?

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Journal of Water Resource and Protection 2024年第4期16卷 233-263页

作者： Mor Diop Ibrahima Mall elhadji mamadou s.nko Tidiane Diop Birane Niane Cheikh Mbow Environmental sciences Institute (IsE) Cheikh Anta Diop university of Dakar Dakar Senegal Higher school of Mines Geology and Environment Amadou Mahtar Mbow University of Diamniadio (UAM) Dakar Senegal Department of Chemical Cheikh Anta Diop university of Dakar Dakar Senegal Departmentof Engineering sciences Iba Der Thiam University of Thi&#232s Thi&#232s Senegal

The Faleme River, a West Africa long transboundary stream (625 km) and abundant flow (>1100 million m3) is affected by severe erosion because of mining activities that takes place throughout the riverbed. To preserve ... 详细信息

The Faleme River, a West Africa long transboundary stream (625 km) and abundant flow (>1100 million msup>3sup>) is affected by severe erosion because of mining activities that takes place throughout the riverbed. To preserve this important watercourse and ensure the sustainability of its services, selecting and implementing appropriates restorations techniques is vital. In this context, the purpose of this paper was to present an overview of the actions and techniques that can be implemented for the restoration/rehabilitation of the Faleme. The methodological approach includes field investigation, water sampling, literature review with cases studies and sWOT analysis of the four methods presented: river dredging, constructed wetlands, floating treatment wetlands and chemical precipitation (coagulation and flocculation). The study confirmed the pollution of the river by suspended solids (Tss > 1100 mg/L) and heavy metals such as iron, zinc, aluminium, and arsenic. For the restoration methods, it was illustrated through description of their mode of operation and through some case studies presented, that all the four methods have proven their effectiveness in treating rivers but have differences in their costs, their sustainability (detrimental to living organisms or causing a second pollution) and social acceptance. They also have weaknesses and issues that must be addressed to ensure success of rehabilitation. For the case of the Faleme river, after analysis, floating treatment wetlands are highly recommended for their low cost, good removal efficiency if the vulnerability of the raft and buoyancy to strong waves and flow is under control.

关键词： Faleme River River Restoration Constructed Wetlands Dredging Floating Treatment Wetlands Coagulation-Flocculation

The Dual of the Two-Variable Exponent Amalgam spaces (L<sup>q()sup>,l<sup>p()sup>)(Ω)

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Journal of Applied Mathematics and Physics 2024年第2期12卷 383-431页

作者： sambourou Massinanke sékou Coulibaly mamadou Traore Departement d’Etudes et de Recherches de Mathématiques et d’Informatique Université des Sciences des Techniques et des Technolo-gies de Bamako Bamako Mali

Wiener amalgam spaces are a class of function spaces where the function’s local and global behavior can be easily distinguished. These spaces are ex-tensively used in Harmonic analysis that originated in the work of Wiener. In this paper: we first introduce a two-variable exponent amalgam space (Lsup>qsup>sup>()sup>,lsup>psup>sup>()sup>)(Ω). secondly, we investigate some basic properties of these spaces, and finally, we study their dual.

关键词： Amalgam spaces Variable Exponent Lebesgue spaces Dual of a Vector space

Microbiological and Physico-Chemical Analysis of the Waters of the “Mamouwol” stream in the Urban District of Mamou (Republic of Guinea)

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Journal of Water Resource and Protection 2024年第8期16卷 559-568页

作者： mamadou Lamarana souare mamadou Madaniou sow saran Camara Adama Moussa sakho Technical Department of Laboratory Superior Institute of Technology Mamou Republic of Guinea study and Research Center in the Environment (CERE) Gamal Abdel Nasser University of Conakry Republic of Guinea

Water is essential to life and to the sustainable socio-economic development of a nation, It is therefore interesting to have a better knowledge of the quality of this water. The aim was to determine the degree of microbiological and physico-chemical pollution of the water of the “Mamouwol” river in the town of Mamou. To do this, we chose four (4) sampling sites spread throughout the town of Mamou. During the month of March (2024), 4 water samples were analyzed to monitor the water quality of this river. The average values of the flora analyzed show that these water are heavily contaminated with bacteria indicative of fecal and metal pollution. This study showed that sites: Mam4;Mam2 and Mam1 contain the highest loads, with Total Coliform counts ranging from 1534 CFU/100 ml to 2100 CFU/100 ml, the number of faecal coliforms varies between 526 and 1240 CFU/100 ml, and that of faecal streptococci between 526 and 841 CFU/100 ml. Metal content, BOD5 and COD all comply with the laboratory’s analysis criteria, although they vary from point to point.

关键词： Pollution Water Watercourses Waterborne Diseases Microbiological Analysis

Oesophageal Mycosis: Epidemiological and Clinical Aspects and Risk Factors for Occurrence in the Digestive Endoscopy Unit of the Donka National Hospital, Conakry CHU

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Open Journal of Gastroenterology 2024年第2期14卷 31-40页

作者： Diallo mamadou sarifou Youssouf Oumarou Yaogo Abdoulatif Diallo Kadiatou Diallo Djéinabou Wann Thierno Amadou Bah mamadou Lamine Yaya Diakhaby mamadou Kanté mamadou Aliou sylla Djibril Hepato-Gastroenterology Department of the Donka National Hospital Conakry Guinea Faculty of Health sciences and Techniques Gamal Abdel Nasser University Conakry Guinea Centre Hospitalier Universitaire Communautaire de Bangui Internal Medicine Department Bangui République Centrafricaine Hepato-Gastroenterology Department Angré University Hospital Abidjan Ivory Coast Department of Internal Medicine Donka National Hospital Conakry Guinea

Introduction: Oesophageal mycosis (OM) is one of the most common opportunistic infections in patients infected with HIV (Human Immunodeficiency Virus). However, this condition is increasingly observed in immunocompetent subjects. The aim of this study was to determine the endoscopic prevalence, clinical characteristics and risk factors for the occurrence of oesophageal mycosis in our department. Patients and Method: This was a prospective cross-sectional study of all patients who underwent oeso-gastroduodenal fibroscopy during the period from 1sup>st sup>January to 31sup>stsup> December 2022, i.e. one year, at the digestive endoscopy unit of the hepato-gastroenterology department of the Donka CHU national hospital in Conakry. All patients found to have oesophageal mycosis by FOGD were included. The endoscopy was performed using appropriate equipment: A Fujinon 4400 video endoscopy column;Three Fujinon EG 590 video gastroscopes;A hoover;Data were collected using a pre-established survey form and analysed using Epi info software version 6.0.4;Pearson’s Chi2 test as a test of independence and the exact 5% threshold ficher test. Results: Out of 1343 upper gastrointestinal endoscopies performed, 107 cases of oesophageal mycosis were found, representing a prevalence of 7.96%. The mean age was 40 years, with a male predominance of 55.42%. The sex ratio M/F was 1.24. The 45 and over age group was the most affected, with a prevalence of 40.43%, followed by the [35 - 45] age group, with a prevalence of 22.43%. Clinical symptoms were dominated by epigastralgia in 74.76% of cases, followed by odynophagia in 37.38% of cases, nausea and vomiting in 28.03% of cases, and pyrosis in 26.16% of cases. Oesophageal mycosis without oesophagitis was the most common endoscopic finding in 70% of cases. The main associated endoscopic lesions were erythemato-erosive and congestive gastropathy in 28.03% of cases, peptic oesophagitis (9.34%) and gastric ulcer (5.60%). The main risk factor

关键词： Endoscopy CHU Conakry Risk Factors Immunosuppression Oesophageal Mycosis

Primary Non-Hodgkin’s Malignant Lymphoma of the Uterus at the Reference Hospital of Maradi/Niger: A Case Report

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Open Journal of Blood Diseases 2024年第2期14卷 43-46页

作者： Moustapha elhadji-Chefou Badé Malam-Abdou Amadou Djibrilla-Almoustapha Maman Brah Moustapha Oumou Kimso Ibrahim Timi Liman elhadji Ali Issa Abdou Amadou Borges Moreno Yuribet Facult des sciences de la sant Universit Dan Dicko Dankoulodo de Maradi Maradi Niger Hopital de Reference de Maradi Maradi Niger Facult des sciences de la sant Universit Abdou Moumouni de Niamey Niamey Niger Facult des sciences de la sant Universit Andr Salifou de Zinder Zinder Niger

Malignant non-Hodgkins lymphoma (MHNL) of the uterus is uncommon. We report a case diagnosed on the basis of histologic and immunohistochemical studies of a hysterectomy specimen induced by a very painful pelvic mass in a 50-year-old patient with no previous history of the disease. It was classified as Ann Arbor IV Bb after imaging, given the medullary infiltration and signs of clinical and biological evolutivity: the patient had received two courses of chemotherapy, CHOP protocol. she died 23 days after the second treatment due to a hypertensive crisis.

关键词： Malignant Non-Hodgkin’s Lymphoma Uterus Referral Hospital Maradi/Niger

Litho-Tectonic Architecture of the Dialafara Area, Kédougou-Kéniéba Inlier, Integration of New Field Data and Geophysics

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Open Journal of Geology 2024年第3期14卷 279-297页

作者： Mahamadou Diallo mamadou Yossi Ibrahim Méyès Coulibaly Youssouf son Amako Dolo Département de Géologie et Mines Ecole Nationale d’Ingénieurs Abderhamane Baba Touré (ENI-ABT) Bamako Mali sagax Afrique s.A Geophysical surveys and Consulting Bamako Mali

The Dialafara area is part of the highly endowed Kédougou-Kéniéba Inlier (KKI), West-Malian gold belt, which corresponds to a Paleoproterozoic window through the West African Craton (WAC). This study presents, first of all, an integration of geophysical data interpretation with litho-structural field reconnaissance and then proposes a new litho-structural map of the Dialafara area. The Dialafara area shows a variety of lithology characterized by volcanic and volcano-sedimentary units, metasediments and plutonic intrusion. These lithologies were affected by a complex superposition of structures of unequal importance defining three deformation phases (Dsub>D1sub> to Dsub>D3sub>) under ductile to brittle regimes. These features permit to portray a new litho-structural map, which shows that the Dialafara area presents a more complex lithological and structural context than the one presented in regional map of the KKI. This leads to the evidence that this area could be a potential site for exploration as it is situated between two world-class gold districts.

关键词： Kédougou-Kéniéba Inlier Dialafara Mapping Aeromagnetic Data structure

Evaluation of Hepatic Fibrosis and Hepatic steatosis by Pulse Elastography (FIBROsCAN/CAP) in Asymptomatic Patients about 170 Cases at the Donka CHU National Hospital in Conakry

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Open Journal of Gastroenterology 2024年第4期14卷 125-138页

作者： mamadou sarifou Diallo Oumarou Youssouf Abdoulatif Yaogo Djenabou Diallo Kadiatou Diallo Thierno Amadou Wann Ahmed Tidiane Diallo mamadou Lamine Yaya Bah Mamdou Diakhaby mamadou Aliou Kanté Djibril sylla Department of Hepato-Gastroenterology The Donka National Hospital Conakry Guinea Faculty of Health sciences and Techniques Gamal Abdel Nasser University Conakry Guinea Internal Medicine Department Centre Hospitalier Universitaire Communautaire de Bangui Bangui Central African Republic Department of Hepato Gastroenterology Angr&#233 University Hospital Abidjan Ivory Coast Department of Internal Medicine Donka National Hospital Conakry Guinea

Introduction: Fibroscan is a recent, non-invasive and non-irradiating diagnostic method. It is based on the principle of ultrasound, which enables liver tissue elasticity to be quantified using a probe, and fibrosis to be assessed. Fibroscan measures both elasticity correlated with hepatic fibrosis and CAP correlated with steatosis. The aim of this study was to evaluate hepatic fibrosis and steatosis using pulse elastometry (Fibroscan/CAP). Methods: This was a descriptive and analytical cross-sectional study in which 170 patients were included. It was conducted from October 1 2021 to December 31 2023, i.e. 27 months, in an outpatient clinic in the hepato-gastroenterology department of the Donka national hospital of the CHU Conakry. Results: Of the 170 patients identified, 87 were male (51%) and 83 female (49%), giving a M/F sex ratio of 1.04. The average age of our patients was 40. The 30 - 50 age group was the most affected, with a frequency of 58.23% (n = 99), followed by the 50 age group with a frequency of 29.41% (n = 50). Hepatomegaly, steatotic liver on ultrasonography, transaminase elevation and obesity were the main indications, respectively: (21.76%), (17.65%), (14.71%), and (13.53%). The examinations were requested by hepatogastroenterologists (47.06%), diabetologists (35.88%) and general practitioners (29%). Of the 170 patients, 100 patients (58.82%) had no significant fibrosis F0F1, 39 (22.94%) had moderate fibrosis F2, 20 patients (11.76%) had severe fibrosis F3 and 11 patients (6.47%) had fibrosis F4. Hepatic steatosis: 62 patients (36.47%) had no s0 steatosis;29.41% had s1 steatosis, 20% had s2 steatosis and 24 patients (14.11%) had s3 steatosis. Abdominal ultrasound revealed a normal liver in 67.05% of patients, hepatic steatosis in 29.41% and non-decompensated cirrhosis in 6 cases. Thus, 108 patients had the parameters required to calculate the Fatty Liver Index (FLI), steatosis was present in 20% of our patients, while 29.41% had an undetermined st

关键词： Cirrhosis Fibrosis Fibroscan/CAP Non-Alcoholic Hepatic steatosis steatosis CHU Conakry

Thyroidectomy: Frequency and Indications in the General surgery Department of the Hôpital National Ignace Deen/CHU de Conakry

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International Journal of Otolaryngology and Head & Neck surgery 2024年第3期13卷 157-167页

作者： mamadou sakoba Barry mamadou Mouctar Ramata Diallo Houssein Fofana Vignin Baudouin Kpossou Boubacar Barry Aboubacar Touré Aissatou Taran Diallo General surgery Department H&#244pital National Ignace Deen/CHU de Conakry Conakry Guinea Faculté des Sciences and Techniques de la Sant&#233-Universit&#233 Gamal Abdel Nasser de Conakry Conakry Guinea ENT Department Mamou Regional Hospital Mamou Guinea

Introduction: Thyroidectomy is a surgical procedure to remove all or part of the thyroid gland. The aim of this study was to report the results of thyroidectomy in the general surgery department of the Hôpital national Ignace Deen/CHU de Conakry. Methodology: This was a retrospective study, of seven (07) years (January 1, 2016 - August 31, 2023), in the General surgery Department of the Ignace Deen National Hospital-CHU in Conakry. We included all records of patients admitted and operated on for thyroidectomy and with up-to-date medical records. The variables were epidemiological, clinical and therapeutic. Results: During the study period, we recorded 3221 cases of surgery, including 40 thyroidectomies (1.24% of cases). The average age was 42.4 years. Women were the most represented, with a sex ratio of 0.16. The reason for consultation was anterior cervical swelling in 86% (n = 25) of cases, followed by signs of cervical compression 21% (n = 6) and signs of thyrotoxicosis 31% (n = 9). Indications for thyroidectomy were dominated by homogeneous goitres in 69% (n = 20) of cases, basedow’s disease in 20.7% (n = 6) and nodular goitres in 6.9% (n = 2) of cases. The surgical procedures were lobo-isthmectomies in 72.4% (n = 21), subtotal thyroidectomies 13.8% (n = 4), total thyroidectomies 10.3% (n = 3). Postoperative follow-up was straightforward in 69% (n = 20). Complications included haemorrhage in 20.7% (n = 6) and recurrence in 6.9% (n = 2). The average hospital stay was 7 days. Conclusion: Thyroidectomy is a relatively frequent surgical procedure in our department. Indications are dominated by homogeneous goitres. Morbidity is related to hemorrhage. Rigorous hemostasis could improve the quality of thyroidectomy.

关键词： Thyroidectomy Indication Ignace Deen

Influence of the Nature of the Incoming sludge on the Performance of a Vertical Flow Reed Beds in Dakar-senegal

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