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Journal of Environmental Science and Engineering(B) 2022年第6期11卷 241-247页

作者： mohamad moustapha dieme Saidou Nourou Diop Mouhamadou Abdoulaye Diallo Amadou Dieye Amadou Lamine Diouf Courfia Kéba Diawara UFR Sciences et Technologies Universitéde Ziguinchor B.P 523 ZiguinchorSenegal Facultédes Science Technique UniversitéCheikh Anta DIOPB.P 5005 Dakar-FannSenegal

The analysis results made on drinking water from the rural areas of Kaolack,Diourbel and Fatick central region of Senegal showed the excess of fluoride and chloride *** on the area,the fluoride concentration in the water can reach 3.5 mg/*** values obtained are completely above of WHO(World Health Organization)*** objective of this study is to assess the performances of membrane filtration units powered by renewable energies for fluoride and salinity excess removal in remote village in *** membrane filtration units have been installed in rural areas of regions such as Kaolack,Fatick and *** membrane filtration units are equipped by the LPRO(Low Pressure Reverse Osmosis)membranes with 9 m^(2)of surface.A rejection rate of fluoride and chloride ions obtained is 99.33%and 95.25%*** conversion rates are ranged from 45%to 65%.These results clearly show that membrane processes can be used in Africa,especially in isolated rural areas,with the combination of renewable ***,more than twenty membrane filtration units are installed in Senegal and provide drinking water of very good quality for populations living in rural *** prospect is to expand it on a larger scale,which is already underway,with the construction of a desalination plant in Dakar.

关键词： Fluoride renewable energy LPRO membrane drinking water rural areas

Impact of Parasitic Resistances on the Output Power of a Parallel Vertical Junction Silicon Solar Cell

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Energy and Power Engineering 2016年第3期8卷 130-136页

作者： Nfally dieme moustapha Sane Laboratory of Semiconductors and Solar Energy Department of Physics Faculty of Science and Technology Cheikh Anta Diop University Dakar Senegal

This paper describes the theoretical model for calculating IV-curve of parallel vertical silicon solar cells (SCs) based on solving diffusion-recombination equation for such SC, which was suggested that two IV curve zones (those which are close to the short current and open circuit points) can be linearized. This linearalization allows obtaining the values of shunt (Rsh) and series (Rs) resistances. The evolution of the electric power based on these resistances was illustrated to show the values that shunt and series resistances must have to obtain a good efficiency.

关键词： Series Resistance Shunt Resistance Power Vertical Junction

Laryngeal Cancers at the Pathological Anatomical Laboratory (ACP) in Dakar about 215 Cases

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Open Journal of Pathology 2023年第2期13卷 79-86页

作者： Marie Joseph dieme Ahouidi Adama Diedhiou Abdou Magib Gaye Dibor Niang Falilatou Seidou Ibou Thiam Cherif Mouhamed moustapha Dial Anatomy and Pathological Cytology Laboratory Fann Hospital Dakar Sénégal Anatomy and Pathological Cytology Laboratory Aristide Le Dantec Hospital Dakar Sénégal Anatomy and Pathological Cytology Laboratory Gaston Berger University St Louis Sénégal Anatomy and Pathological Cytology Laboratory Idrissa Pouye Hospital Dakar Sénégal

Introduction: Laryngeal cancer is the first cancer of upper aerodigestive tract. Dysphonia, dyspnea and dysphagia are evocative signs. Diagnosis is histological and squamous cell carcinoma is the most common type. The objective of our study was to discuss epidemiological and anatomo-pathological characteristics of laryngeal cancers diagnosed in different pathological anatomy and cytology (ACP) laboratories of Dakar hospitals. Material and method: This was a retrospective study spanning from January 2013 to December 2018 at the pathological anatomy laboratories of Fann, Aristide Le Dantec and Idrissa Pouye hospitals. All patients with laryngeal cancer confirmed at histology were included. Data collection was based on clinical records of the patients and archives of histological reports of the pathological laboratories. Data analysis was performed under the Excel software. Results: We collected 215 cases of laryngeal cancer. The average age was 58.01 years with extremes of 07 and 94 years. The male sex was predominant with 183 patients (85.12%) against 32 women (14.88%). The most noted risk factor was tobacco which affected 14 patients, or 60.87%. Three patients (13.04%) did not present any alcohol-smoking impregnation. Clinically, dysphonia was noted in 22 patients (26.51%). It was associated with dyspnea in 0.48% of cases and dysphagia in 3.61%. Laryngoscopy was performed in 62 patients or 28.83% of cases, nasofibroscopy in 6.45% of cases. Cord arythenoid fixity was noted in two patients (3.23%) and hypo-mobility in 1 patient (1.61%). The most frequent local extension was involvement of the piriform sinus with 11.29% of cases. Palpable lymphadenopathy reported in 17 patients (20.48%). Pathological examination was performed in all patients after post endoscopic biopsy in 92 patients (42.79%), and after obtaining the operative specimen in 123 cases (57.21%). The three floors affected 76 patients (35.35%). The ulcerative budding aspect most noted concerned 108 patients

关键词： Laryngeal Cancer Carcinoma Dakar

Rhabdomyosarcoma in Dakar: An Update on Pronostics Factors

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Open Journal of Pathology 2022年第1期12卷 37-45页

作者： Abdou Magib Gaye Marie Joseph dieme-Haouidi Ibou Thiam Fabrice Senghor Gabriel Nougnignon Comlan Deguenonvo Cherif Mouhamed moustapha Dial Anatomy and Pathological Cytology Laboratory of the Aristide Le Dantec Hospital Dakar Senegal Anatomy and Pathological Cytology Laboratory of the Fann Hospital Dakar Senegal Anatomy and Pathological Cytology Laboratory of the Idrissa Pouye General Hospital Dakar Senegal

Rhabdomyosarcoma (RMS) belongs to the soft tissue sarcomas that have striated muscle differentiation. It is most common in young children under 5 years of age and adolescents. The definite diagnosis of rhabdomyosarcoma is based on histology and the positivity of striated muscle markers in immunohistochemistry. Our objective was to describe the prognostic characteristics of RMS diagnosed in Dakar. MATERIAL AND METHODS: This was a retrospective and descriptive study spread over nine (09) years from 1 January 2011 to 31 December 2019. It was conducted from the histological report archives of the anatomy and pathology laboratories of Dakar. Paraffin blocks were reread and immunohistochemically studied by manual method. Antidesmin and antimyogenin antibodies were used. RESULTS: We collected 44 patients with rhabdomyosarcoma out of 228 cases of soft tissue cancers, i.e. 19.29% of all malignant soft tissue tumours. The mean age of the patients was 25.41 ± 23.95 (standard deviation) years with a median age of 16 years and extremes of 6 months and 81 years. Patients were less than or equal to 17 years of age in 61.4% of cases. A clear male predominance was observed with 29 men (65.9%) against 15 women (34.1%). Rhabdomyosarcomas were located in the limbs in 34.1% of cases, in the head and neck in 29.5% of cases and in the genitourinary tract in 25% of cases. The average tumour size was 7.45 cm ± 4.64 (standard deviation) with a minimum of 2 cm and a maximum of 17 cm. It was greater than or equal to 5 cm in 15 patients (68.2%). Embryonal rhabdomyosarcoma (ERMS) was the most frequent histological type with 34 cases (77.3%), followed by pleomorphic rhabdomyosarcoma 7 cases (15.9%) and alveolar rhabdomyosarcoma 3 cases (6.8%). The histological subtypes of ERMS consisted of conventional ERMS (91.18%);botryoid RMS (5.88%) and spindle cell RMS (2.94%). The correlation between histological type and age was statistically significant (p = 0.039). A relationship was also observ

关键词： Rhabdomyosarcoma Prognosis Histology Dakar

Fluoride Excess Removal from Brackish Drinking Water in Senegal by Using KSF and K10 Montmorillonite Clays

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Journal of Water Resource and Protection 2022年第1期14卷 21-34页

作者： Saïdou N. Diop mohamad M. dieme Mouhamadou A. Diallo Courfia K. Diawara UFR Sciences & Technologies Université Assane Seck de Ziguinchor Ziguinchor Senegal Faculté des Sciences Technique Université Cheikh Anta Diop Dakar Senegal

Fluoride excess in drinking water is noticed in many countries around the world and particularly in Senegal where, in addition to fluoride excess, high levels of salinity are also encountered. In order to reduce fluoride excess in drinking water in the groundnut basin of Senegal, two types of clays namely montmorillonite KSF and montmorillonite K10 as well were used as adsorbent materials. The results show that the pH which was initially alkaline becomes acidic varying from 2.80 to 6.80. The pseudo first-order kinetic model fit well with the adsorption experiments for KSF montmorillonite (r2 = 0.96), while for K10 clay the same model describe the experiments with slight differences (r2 = 0.90). The KSF clay has a better fluoride adsorption capacity compared to that obtained with K10 clay due to the presence of a great level of calcium oxide in the montmorilonite KSF clay.

关键词： Fluoride Brackish Water Montmorillonite KSF Montmorillonite K10

Thyroid Cancers in the Thies Regional Hospital Center: Morpho-Epidemiological Study on 14 Cases

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Open Journal of Pathology 2023年第3期13卷 153-163页

作者： Tonleu Linda Bentefouet Abou Sy Adama Ka Yannick Soubeiga Assane Sow Jacques Ammasiga Faye Marie Joseph dieme Ahouidi Cherif Mamadou moustapha Dial Malick Ndiaye Thies Training and Research Unit in Health Sciences Dixième-Thiès Thiès Senegal Cheikh Anta Diop University Dakar Senegal

Introduction: Thyroid cancers are malignant cell proliferations developed at the expense of the thyroid gland, and which can spread from a distance. Most cancers appear in the form of anterior cervical swelling. Ultrasound and pathological examination allow the diagnosis of certainty. In Thiès, the studies carried out on thyroid cancers essentially focus on clinico-radiological and therapeutic aspects. We propose, through this study, to describe the epidemiological aspects and the morphological characteristics of thyroid cancers at Thiès Regional Hospital Center. Methodology: This is a retrospective, descriptive and analytical study conducted over a period of 3 years and 6 months, from January 2019 to June 2022. All patients with thyroid cancer confirmed by histological examination were included. Results: The patients who met the inclusion criteria were fourteen in number (14). The average age of patients was 40, 7 +/- 19 years old with extremes of 08 years and 75 years. Our series reports an 86% majority of women against 14% of men, with a sex ratio of 0.17. The isolated thyroid nodule was the most frequent mode of revelation of papillary thyroid cancers in our series, representing 54.6% of patients. The samplings received at the laboratory were essentially total thyroidectomy specimens. The tumor size varied between 1.5 cm and 14 cm. Papillary thyroid carcinoma was the most frequent histological type, with a frequency of 78.6%, followed by gallbladder carcinoma and squamous cell carcinoma. Conclusion: Thyroid cancers affect young subjects and are discovered at a late stage in our context.

关键词： Thyroid Carcinoma Senegal Thiès Histopathology

Epidermal Inclusion Cyst: A Rare Benign Breast Lesion

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Open Journal of Pathology 2022年第2期12卷 64-69页

作者： Abdou Magib Gaye Modukpè Colette Nadine Odah Moussa Guira Fabrice Senghor Gabriel Nougnignon Comlan Deguenonvo Amadou Ndiade Ibou Thiam Marie Joseph dieme-Ahouidi Cherif Mouhamed moustapha Dial Anatomy and Pathological Cytology Laboratory Aristide Le Dantec Hospital Dakar Senegal Public Care Center of Richard Toll Saint-Louis Senegal Anatomy and Pathological Cytology Laboratory Idrissa Pouye General Hospital Dakar Senegal Anatomy and Pathological Cytology Laboratory Fann Hospital Dakar Senegal

Epidermal inclusion cyst in the breast is an uncommon condition. It may be congenital, originating from hair follicles or occurring after trauma (breast reduction or breast cytology puncture) or consists of squamous metaplasia of the regular columnar epithelium within an ectatic ductus galactophorus. We report the case of a 22-year-old woman, with two pregnancies and with no particular pathological history, who presented with a 3 cm nodule of the right breast at the union of the upper quadrants, firm, mobile and painless. The skin, areola and nipple were unaffected. The axillary areas and the contralateral breast were unremarkable. The breast ultrasound showed a heterogeneous and well circumscribed hypoechoic mass classified as ACR3. Macroscopic examination revealed a unilocular cyst with a discretely thickened wall, abundant yellowish contents and measuring 2 cm on a long axis. Histologically, it was a cystic cavity whose wall was lined with a pseudo stratified keratinized squamous epithelium with a granular layer and whose lumen contained keratin lamellae. This cyst is surrounded by a more or less fibrous pallial tissue containing regular, sometimes dilated or even cystic milk ducts. The diagnosis of epidermal inclusion cyst of the breast on a background of fibrocystic mastopathy was thus concluded. The importance of this benign lesion lies in the differentiation between other non-neoplastic and neoplastic breast lesions.

关键词： Epidermal Inclusion Cyst Breast Fibrocystic Mastopathy Dakar Senegal