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Traditional Pathway of Oil Extraction from <i>Quassia undulate</i>Seeds and Its Chemical Characteristic

Food and Nutrition Sciences 2021年第5期12卷 452-461页

作者： Ndiaye Seyni Gueye Mathieu baldé samba Ndiaye Bou Ayessou Nicolas Cyrille Laboratoire Eau-Energie-Environnement et Procédésindustriels (LE3PI) ESP-UCAD Dakar Sénégal Center for Studies on Food Safety and Functional Molecules (CESAM-RESCIF) ESP-UCAD Dakar Sénégal Laboratoire UMI 3189 Bp206 Dakar Département de Botanique et de Géologie Institut Fondamental d’Afrique Noire (IFAN) Cheikh Anta Diop University Dakar Sénégal

In Africa, traditional vegetable oil extraction often involves the use of plants in the manufacturing process. Quassia undulate oil is thus traditionally prepared. An expedition went to Kédougo (a region in southeastern Senegal involving women of the Bassaris community) in June 2018 to study the Q. undulate oil traditional extraction mode. Thus, the objective of this study is to follow the traditional extraction of Q

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Optimization of the Aqueous Decoction Process of Combretum micranthum Leaves

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Food and Nutrition Sciences 2023年第3期14卷 277-286页

作者： Papa Guedel Faye Edouard Mbarick Ndiaye samba baldé Alioune Sow Omar Khatab Cissé Nicolas Cyrille Ayessou Mady Cisse Laboratory of Water Energy Environment and Industrial Processes (LE3PI) Polytechnic Higher School Cheikh Anta Diop University of Dakar (ESP-UCAD) Dakar Senegal UFR Agronomic Sciences Aquaculture and Agrifood Technologies Gaston BERGER University Dakar Senegal National School of Agriculture Iba Der THIAM University Thies Senegal Center for Studies on Food Security and Functional Molecules (CESAM) Dakar Senegal

This work proposes to compare the extraction of total polyphenols and the coloring obtained after several series of decoction at 100°C/20min, of whole or crushed leaves of Combretum micranthum. The total phenolic content of the extracts obtained after decoction was determined by Folin’s method. The color parameters were measured using a colorimeter based on the CIELAB system. The analysis of variance (ANOVA) shows significant differences (p 0.05) on different parameters evaluated. The Minitab 19 software was used to classify the extracts according to the color parameters (L, A, and B). The results showed that the maximum of polyphenols (21.67%) was extracted in the crushed leaves after three series of decoctions while with the whole leaves the maximum of 16.17% is obtained after six series of decoctions. The concentration of total polyphenols becomes low from four series of decoctions with 0.146 g·AG·100 g-1 MS. The red and yellow coloring drops respectively by 85 and 69% with crushed leaves and 64 and 21% with whole leaves. The conductivity and the brix of the extracts fall according to the series of decoctions. These results show that for optimal use of C. micranthum leaves in traditional medicine, crushed leaves and three series of decoctions are indicated and sufficient.

关键词： Combretum micranthum Extraction Decoction Polyphenols Coloring

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Impact of Storage Conditions on the Physicochemical Characteristics of Baobab (Adansonia digitata L.) Seed Oil

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Food and Nutrition Sciences 2022年第4期13卷 373-386页

作者： Edouard Mbarick Ndiaye Papa Guédel Faye Alioune Sow Khadim Niane Seyni Ndiaye samba baldé Omar Ibn Khatab Cisse Nicolas Cyrille Ayessou Mady Cisse Laboratory of Water Energy Environment and Industrial Processes (LE3PI) Polytechnic Higher School Cheikh Anta Diop University of Dakar (ESP-UCAD) Dakar Center of Studies on Food Security and Functional Molecules (CESAM-RESCIF) ESP-UCAD Dakar Senegal UFR of Agronomic Sciences Aquaculture and Food Technologies (S2ATA) Gaston Berger University of Saint-Louis Saint-Louis Senegal National School of Agriculture Iba Der Thiam University of Thies Thies Senegal

The evolution of some quality markers of baobab (Adansonia digitata L.) was studied. Baobab oil extracted by pressing was packaged in 30 mL non-amber glass bottles and stored at different temperatures: 20°C, 30°C and 45°C. The physicochemical parameters (acid, peroxide, iodine, saponification, refraction and color indices) were determined during three months’ storage. A significant 5% increase in acid, peroxide and saponification value was observed over time. However, the iodine value decreased. The yellowing and refractive index remained stable while storage at 45°C caused the most significant changes in chemical parameters. The results obtained show that oils stored at 20°C had the lowest acid (2.42 ± 0.26 mg KOH/g) and peroxide (0.82 ± 0.25 mEqO2/Kg) value after three months of follow-up.

关键词： Adansonia digitata L. Oil Seeds Physicochemical Storage

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Hydrochemistry of Groundwater in the Rice Cultivation Area of Maga: Analysis of the Mineralization Process

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Journal of Geoscience and Environment Protection 2024年第9期12卷 370-387页

作者： Emmanuel Aguiza Abaï Hugues Pahimi Prosper samba Koukouare Guillaume Ewodo Mboudou Auguste Ombolo Department of Industrial Security Quality and Environment National Advanced School of Mines and Petroleum Industries University of Maroua Kaele Cameroon School of Chemical Engineering and Mineral Industries University of Ngaoundere Ngaoundere Cameroon Department of Hydrocarbons Exploitation Mao National Higher Petroleum Institute NDjamena Chad Department of Hydraulics and Water Management National Advanced School of Engineering of Maroua University of Maroua Maroua Cameroon Department of Rural Engineering Higher Institute of Agriculture Forestry Water and Environment University of Ebolowa Ebolowa Cameroon

The use of groundwater for drinking water supply to the population is increasingly practiced in the rice cultivation area of Maga. However, there is a lack of knowledge about the hydrochemical characteristics of this water due to a lack of quality control. This study aims to contribute to the understanding of mineralization processes in order to establish the hydrochemical profile of the water in the area. The methodological approach consisted of collecting fifteen water samples from wells and boreholes during six campaigns for physicochemical analysis, and studying them through methods of interpreting hydrochemical data. The analysis results show that these waters are moderately mineralized. The water facies are mainly of the bicarbonate sodium and potassium type, as well as the bicarbonate calcium and magnesium type. Calculation of saturation indices demonstrates that evaporite minerals show lower degrees of saturation than carbonate minerals, with gypsum, anhydrite, and halite being in a highly undersaturated state. The mineralization of groundwater originates from the dissolution of surrounding rocks on the one hand, and anthropogenic activities involving exchanges between alkalis (Na+ and K+) in the aquifer and alkaline earth (Ca2+ and Mg2+), resulting in the fixation of alkaline earth and the dissolution of alkalis.

关键词： Hydrochemistry Mineralization Groundwater Maga

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Detailed Analyses of Nymphea Seeds Consumed in the Senegal River Valley

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Food and Nutrition Sciences 2024年第8期15卷 695-700页

作者： Nicolas Cyrille Ayessou Michel Bakar Diop Fatou Kiné Gueye César Bassène Mame samba Mbaye Centre dEtudes sur la Scurit Alimentaire et les Molcules Fonctionnelles (CESAM-RESCIF) Universit Cheikh Anta DIOP Dakar Sngal Unit de formation et de Recherche des Sciences Agronomiques de lAquaculture et des Technologies Alimentaires Universit Gaston Berger Saint-Louis Sngal Laboratoire de Botanique-Biodiversit Biologie Vgtale Universit Cheikh Anta Diop Dakar Senegal

Physicochemical investigations were performed on seeds of Nymphea lotus and N. micrantha consumed in the Senegal River valley. They revealed a composition similar to that of cereals. In order to estimate their intrinsic quality, the determination of their amino acid, fatty acid and monosaccharids profiles was done. The results indicate that monosaccharides are represented specifically by saccharose (7%) and glucose (0.67%);a predominance of stearic acid and linoleic acid as unsaturated acids (24.86%);arachidic and palmitic acids as the only saturated acid found (11.12%);a good ratio of unsaturated/saturated acid (2.23);a lack of oleic acid, linoleic, palmitoleic, myristic, caprylic acids;a poor-quality index protein due to low quantity amino acids. Nevertheless, all essential amino acids are present in the seeds. The Nymphea sp grains consumed by the populations around the Senegal River valley offer an interesting nutritional quality linked to fatty acids and carbohydrates.

关键词： Nymphea Seeds Composition

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Molecular characterization of an outbreak-involved Bacillus anthracis strain confirms the spillover of anthrax from West Africa

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Infectious Diseases of Poverty 2024年第1期13卷 93-94页

作者： Shuchao Wang Roland Suluku Mohamed B.Jalloh Ahmed F.samba Baogui Jiang Yubiao Xie Doris Harding Mengyao Zhang Foday Sahr Mahmud E.Sesay James S.Squire Mohamed A.Vandi Moinina N.Kallon Shoufeng Zhang Rongliang Hu Yuee Zhao Zhiqiang Mi Changchun Veterinary Research Institute Chinese Academy of Agricultural Sciences Changchun China Department of Animal Sciences School of Agriculture and Food Sciences Njala University Njala Sierra Leone Department of Microbiology College of Medicine and Allied Health Sciences University of Sierra Leone Freetown Sierra Leone Ministry of Agriculture and Food Sciences Freetown Sierra Leone Beijing Institute of Microbiology and Epidemiology Beijing China Ministry of Health and Sanitation Freetown Sierra Leone Beijing Institute of Biotechnology Beijing China

Background Anthrax,a zoonotic disease caused by the spore-forming bacterium Bacillus anthracis,remains a major global public health concern,especially in countries with limited *** Leone,a West African country historically plagued by anthrax,has almost been out of report on this disease in recent *** this study,we described a large-scale anthrax outbreak affecting both animals and humans and attempted to characterize the *** The causative agent of the animal outbreak in Port Loko District,Sierra Leone,between March and May 2022 was identified using the nanopore sequencing technique.A nationwide active surveillance was implemented from May 2022 to June 2023 to monitor the occurrence of anthrax-specific symptoms in *** cases were subsequently verified using quantitative polymerase chain ***-genome sequencing was accomplished by combining long-read and short-read sequencing *** phylogenetic analysis was performed based on the full-chromosome single nucleotide *** The outbreak in Port Loko District,Sierra Leone,led to the death of 233 animals between March 26th and May 16th,*** ruled out the initial suspicion of Anaplasma species and successfully identified *** as the causative agent of the *** a result of the government's prompt response,out of the 49 suspected human cases identifed during the one-year active surveillance,only 6 human cases tested positive,all within the frst month after the official declaration of the *** phylogenetic analysis indicated that the BaSL2022 isolate responsible for the outbreak was positioned in the ***.153 clade within the TransEuroAsian group of *** We successfully identifed a large-scale anthrax outbreak in Sierra *** causative isolate of ***,BaSL2022,phylogenetically bridged other lineages in ***.153 clade and neighboring genetic groups,***.144 and ***.148,

关键词： Molecular identification Anthrax Bacillus anthracis Sierra Leone Phylogeny Single nucleotide polymorphism

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Ceramic Properties of Three Specimens of Alluvial Clays Used in Local Constructions from Mbouda Clay Deposit, West Cameroon

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Journal of Minerals and Materials Characterization and Engineering 2024年第5期12卷 265-279页

作者： Philémon Zo’o Zame Sylvain Kouayep Lawou Philippe samba Assomo Audrey Erman Moutsou Yannick Lontchi Dzoti Véronique Kamgang Kabeyene Beyala Faculty of Science University of Yaound I Yaound Cameroon Higher Teacher Training College Bertoua University of Bertoua Bertoua Cameroon Faculty of Science University of Dschang Dschang Cameroon

The Mbouda alluvial deposit is located at the foot of the Bamboutos mountains (West Cameroon) where three types of clayey materials are widespread. The populations collect these clays in their natural state in view of constructions using fired bricks or compressed blocks. Unfortunately, these buildings are not strong. This study investigates the causes of the strengthlessness of buildings and suggests solutions to overcome the difficulty. The research content includes field and laboratory studies. The methodology consists of sampling black (AN), white (AB) and red (AR) clays specimens identified in the study area and analysing them simultaneously at MIPROMALO (Cameroon) and at ACME LAB in Vancouver (Canada). The results obtained show a high sand content in the samples AN (64%), AB (55.2%), AR (30.9%). The compressive strength of the built specimens is low at 900˚C considered as the traditional firing temperature AN (0.94 MPa), AB (5.25 MPa), AR (2.18 MPa). The mineralogical series are identically made by kaolinite, chlorite, gibbsite, quartz, muscovite, biotite, goethite, magnetite and hematite. Silica (SiO2) presents higher contents AN (52.87%), AB (48.02%), AR (47.68%) followed by alumina (Al2O3) AN (29.96%), AB (28.13%), AR (24.72%). The other elements are poorly represented.

关键词： Sand Bricks Clays Mechanical Properties Local Constructions

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Infection in Multiple Myeloma: Microbiological Profile and Prognosis in Senegalese Patients

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Open Journal of Blood Diseases 2024年第2期14卷 47-58页

作者： Seynabou Fall El Hadj Daouda Niang Khadim Sarr Lolita Mariéme Camara-Tall Modou Moustapha Ciss Amy Thiam Aminata Dakono Awa Ndiaye Fatou samba Diago Ndiaye Clinical Hematology Department of Dalal Jamm Hospital Gudiawaye Dakar Sngal Hematology Clinic Unit of Aristide Le Dantec Hospital Dakar Sngal

Introduction: Infections are additional factors of morbidity and mortality in multiple myeloma (MM), and the current recommendation is antibiotic prophylaxis. In sub-Saharan Africa, few data on infectious complications of MM are available. We aim to describe the microbiological features of infections in MM, and their impact on survival in Senegalese patients. Methods: A retrospective (January 2005-January 2022), analytic, multicenter study on infections in patients followed for MM (IMWG criteria) in Senegalese clinical hematology services. The socio-epidemiological, diagnostic, microbiological, evolutionary and survival aspects were analyzed. Results: The study included 106 patients with multiple myeloma who had an infection at admission or during the treatment. Ten patients have the comorbidity (hypertension, lupus, type 2 diabetes). These patients had 136 infectious events identified at diagnosis (79.2%) or during chemotherapy (20.8%). The sites of infection are lung (42.6%), urinary (29.4%), dermatological (6.6%), digestive (5.2%), osteoarticular (4.4%), ear, nose and throat (3.7%), central nervous system (1.5%), or without site. We recorded 26.4% of patients with multi-site infections. The causal pathogens are bacteria (Gram-negative bacilli: 22.1%;Gram positive bacilli: 9.5%, Mycobacterium tuberculosis: 13.3%), parasitique (plasmodium falciparum 6.6%), viruses (SARS-COV2: 2.9%, VZV: 2.2%) and fungal (2.9%). Survival was reduced in patients who had an infection at the time of multiple myeloma diagnosis (p: 0.189) and those who had multiple infectious foci (p: 0.011). Conclusion: Infections in multiple myeloma are more frequent at diagnosis. The germs are varied and mostly bacteria, particularly gram-negative bacteria, and Kochs bacillus. Our study reveals that multiple infectious foci are a poor prognosis factor. It is necessary to evaluate the infectious risk early, and to adopt an antibiotic prophylaxis based on our tropical environment.

关键词： Multiple Myeloma Infections Tuberculosis Senegal

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Epidemiological, Clinical, Therapeutic, and Evolutionary Aspects of Heart Failure in the Medical Department at Gao Regional Hospital

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World Journal of Cardiovascular Diseases 2024年第5期14卷 309-321页

作者： Coulibaly Alhousseny Dollo Ibrahim Guindo Hamadoun Sidibé Lamine Mariko Souleymane Traoré Bassirima Dao Karim Guindo Ibrahim Togo Mamadou Sidibé samba Sangaré Ibrahima Ba Hamidou Oumar Ichiaka Menta Departement of Medicine Gao Hospital Gao Mali Departement of Medicine Mopti Regional Hospital Mopti Mali Departement of Medicine Tombouctou Hospital Tombouctou Mali Departement of Cardiology CHU Gabriel TOURE Bamako Mali

Introduction: Heart failure is a major public health pandemic, particularly in Africa, where its prevalence continues to increase. In northern Mali, few data exist, hence the interest of this study with the objective of studying the epidemiological, clinical and therapeutic and evolutionary aspects of Heart failure at the regional hospital of Gao. Patients and Methods: This was a cross-sectional, descriptive study that took place from July 2022 to June 2023 in the medical department at Gao Hospital. Results: The hospital prevalence of heart failure was 44.1%. The mean age was 47.30 ± 20 years (range: 16-88). Hypertension was the most common with 46.1%, followed by a sedentary lifestyle, and diabetes with 18.2% and 8.3% respectively;NYHA stage III-IV dyspnea was found in 83.9%. Reduced EF heart failure was present in 110 patients (76.9%), seventeen cases with moderately reduced EF (11.9%) and sixteen patients had preserved EF (11.2%). Global heart failure was the dominant (91.6%). The main etiologies of heart failure were dominated by hypertensive heart disease in 46 patients (32.2%), followed by postpartum cardiomyopathy with 43 cases (30.1%), primary dilated cardiomyopathy in 18 patients (12.6%), ischemic heart disease in 16 patients with 11.2%. Seven cases of valvular heart disease, or 4.9%. The evolution was favorable under treatment in 104 patients or 72.7%. In-hospital mortality was 14.7%. Conclusion: Heart failure is a common condition in sub-Saharan Africa, particularly in our country.

关键词： Heart Failure Epidemioclinical Progressive Gao Hospital

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Epidemiological, Clinical and Coronary Angiography Aspects of Acute Coronary Syndrome in the Cardiology Department of the Hospital Mother-Child “Le Luxembourg”Mali

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World Journal of Cardiovascular Diseases 2024年第4期14卷 228-233页

作者： Sidibé samba Toure Mamadou Konate Massama Sankaré Hamma Traoré Ousmane Mahamat Guire Sadik Diall Mahan Ameri Dicko Bahaide Daffe Sanoussy Keita Asmaou Thiam Coumba Adiaratou Diarra Soumaila Menta Ichaka Cardiology Department CHU-M&#232re Enfant Bamako Mali Cardiology Department CHU-Point G Bamako Mali Faculty of Medicine University of Sciences Techniques and Technologies of Bamako Bamako Mali Cardiology Department CHU-Gabriel Tour&#233 Bamako Mali Cardiology Department Mali Hospital Bamako Mali

Introduction: Cardiac catheterisation plays a fundamental role in the management of acute coronary syndrome. These explorations require heavy, complex and costly equipment and a large team of doctors, nurses and technicians with highly specialized training. Aims: To describe epidemiological, clinical and coronary angiography aspects of patients with acute coronary syndrome. Patients and Methods: Descriptive study from September 2019 to December 2023 in the Cardiology Department of the Hôpital Mère-Enfant of Bamako. Inclusion criteria were patients admitted for coronary angiography with the diagnosis of acute coronary syndrome. Results: During the study period, 1253 patients underwent coronary angiography, 596 of whom had acute coronary syndrome as an indication, representing a hospital frequency of 47%. Sex-ratio was 2.10. Mean age of patients was 58.5 ± 11.39 years. ST elevation acute coronary syndrome was the most common indication with 63.92% of cases. High blood pressure was the main cardiovascular risk factor with 58.7% of cases, and radial access approach was used in 98% of cases. Coronary angiography was pathological in 91.70% of cases (n = 548). Patients with lesions of anterior interventricular artery were 73.73% of cases. Tritruncal lesions accounted for 40.63% of cases. Conclusion: ST elevation acute coronary syndrome is the most frequent manifestation of acute coronary syndrome. Anterior interventricular artery is most often the culprit lesion for our patients.

关键词： Coronary Angiography Acute Coronary Syndrome Bamako Mali

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