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Therapeutic Itinerary of Patients Living with Viral Hepatitis B and C in Guinea

Open Journal of Gastroenterology 2022年第10期12卷 299-306页

作者： Diallo Kadiatou Barry Fatoumata Diaraye Diallo Thierno Saidou Diallo Djenabou Sow Ousmane Diallo Mamadou Sarifou Sylla Mariétou Salifou Sylla Djibril leno niouma nestor Diallo Alpha Amadou Sank Tounkara Thierno Mamadou Faculty of Health Sciences and Techniques Gamal Abdel Nasser University Conakry Guinea Department of Internal Medicine and Hepato-Gastroenterology National Hospital Donka Conakry Guinea National Programme for the Fight against HIV and Viral Hepatitis Ministry of Health and Public Hygiene Conakry Guinea Inter-Army Medical and Surgical Centre Conakry Guinea Department of Dermatology-MST National Hospital Donka Conakry Guinea

Introduction: The therapeutic pathway affects the patient who changes care facilities. This change is linked to factors such as financial means, geographical accessibility of care facilities, quality of care and the socio-cultural perception of the patient. In countries with limited resources such as Guinea, the therapeutic itinerary remains multiple and hampered by obstacles. The objective of this study was to describe the therapeutic itinerary of patients living with hepatitis B and C at the Donka National Hospital. Material and methods: This was a retrospective, descriptive study lasting 43 months (24 January 2017 - 27 August 2020);it focused on patients living with hepatitis B or C or viral cirrhosis. We collected sociodemographic, clinical and treatment history variables. The data were analysed with SPSS software version 21.0. Results: Out of 5400 patients, the proportion of viral hepatitis B or C represented 393 patients (7.3%). The mean age of our patients was 35 ± 10 years, with extremes of 16 - 77 years. The sex ratio was 2.5. Three hundred and forty-two patients (87%) had recourse to modern medicine, mostly in private facilities (50.6%). One hundred and twenty-five patients (31.8%) had received previous treatment, half of whom (57.6%) had received inappropriate treatment. The delay in treatment was long in 45% of cases. The main reasons for delaying treatment were feeling unwell in 33.3%;not knowing to consult a specialist in 29.9% and feeling that they were being treated with useful drugs in 24.3%. Conclusion: The lack of training of general practitioners on the management of viral hepatitis and the scarcity of awareness campaigns on viral hepatitis contributed to the inadequacy of the management.

关键词： Therapeutic Itinerary Hepatitis B Hepatitis C Guinea

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Dynamics analysis and cryptographic implementation of a fractional-order memristive cellular neural network model

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Chinese Physics B 2024年第4期33卷 418-433页

作者：周新卫蒋东华 Jean De Dieu Nkapkop Musheer Ahmad Jules Tagne Fossi nestor Tsafack 吴建华 Department of Information Engineering Gongqing CollegeNanchang UniversityJiujiang 332020China School of Computer Science and Engineering Sun Yat-Sen UniversityGuangzhou 511400China Department of Electrical Engineering and Industrial Computing University Institute of TechnologyDoualaCameroon Department of Computer Engineering Jamia Millia IslamiaNew Delhi 110025India Department of Physics Faculty of ScienceUniversity of YaoundeCameroon Electrical Engineering Department and Industrial Computing of ISTAMA University of DoualaDoualaCameroon

Due to the fact that a memristor with memory properties is an ideal electronic component for implementation of the artificial neural synaptic function,a brand-new tristable locally active memristor model is first proposed in this paper.Here,a novel four-dimensional fractional-order memristive cellular neural network(FO-MCNN)model with hidden attractors is constructed to enhance the engineering feasibility of the original CNN model and its performance.Then,its hardware circuit implementation and complicated dynamic properties are investigated on multi-simulation platforms.Subsequently,it is used toward secure communication application scenarios.Taking it as the pseudo-random number generator(PRNG),a new privacy image security scheme is designed based on the adaptive sampling rate compressive sensing(ASR-CS)model.Eventually,the simulation analysis and comparative experiments manifest that the proposed data encryption scheme possesses strong immunity against various security attack models and satisfactory compression performance.

关键词： cellular neural network memristor hardware circuit compressive sensing privacy data protection

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Male and Female Hypogonadisms: Etiological, Metabolic and Osteodensitometric Aspects

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Open Journal of Endocrine and Metabolic Diseases 2024年第2期14卷 39-52页

作者： nestor Ghislain Andzouana Mbamognoua Ikram Damoune Sana Doubi Asmae Lahlou Farida Ajdi Department of Metabolic and Endocrine Diseases Brazzaville University Hospital Brazzaville Republic of the Congo Faculty of Health Sciences Marien Ngouabi University Brazzaville Republic of Congo Department of Endocrinology Metabolic Diseases Hassan II University Hospital of Fez Fez Morocco

Introduction: Studies showed a high prevalence of metabolic abnormalities including dyslipidemia, type 2 diabetes in cases of low testosterone in men and which are associated with increased cardiovascular risk. Hypogonadism represents the second cause of endocrine osteoporosis. Objectives: The objectives of our work were: to determine the main causes of hypogonadism in women and men;to assess the frequency of metabolic and osteosdensitometric abnormalities in the hypogonadal population. Patients and methods: A retrospective descriptive study was carried out over 7 years on 120 patients, hospitalized in the Endocrinology department of the Hassan II University Hospital of Fez-Morocco for hypogonadism. The patients selected were those who had symptoms of hypogonadism confirmed in men by: low total testosterone for Tanner stage in adolescents, ng/ml or lower limit of normal for adults;in women, hypoestrogenia 30 pg/l. Gonadotropin dosage, karyotype, pelvic or testicular ultrasound and pituitary MRI, for etiological diagnosis, were performed. Bone densitometry was performed for bone impact and lipid profile for metabolic profile. Results: Out of 120 patients, there were 77 women and 43 men. The average age was 31.51 years. In men, the main causes were central hypogonadism in 67.4% and primary testicular failure in 32.6%. In women, central hypogonadism was also the most common cause noted in 63.7% and premature ovarian failure was observed in 36.4%. HypoHDL was significantly more frequent p (0.005) in women, osteopenia and osteoporosis were significantly more frequent in women than in men p (0.046). Conclusion: Central causes represent the most common etiology of hypogonadism in both sexes;abnormalities of bone mineralization and metabolic disorders were predominant in women.

关键词： Hypogonadism Etiological Metabolic Osteodensitometric Fez

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Climate-influenced vector-borne diseases in Africa: a call to empower the next generation of African researchers for sustainable solutions

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贫困所致传染病(英文) 2024年第2期13卷 1-10页

作者： Obame-Nkoghe Judica?l Agossou Adjoavi Esse Mboowa Gerald Kamgang Basile Caminade Cyril Duke Dawn C. Githeko Andrew Karanja Ogega Obed M. Elloué nestor Engone Sarr Fatou Bintou Nkoghe Dieudonné Kengne Pierre Ndam Nicaise T. Paupy Christophe Bockarie Moses Otomo Patricks Voua Community Health Support Program P.O. Box Kisumu Kenya The African Academy of Sciences Nairobi Kenya Center for Phylosophical Studies and Research (CERP) Omar Bongo University (UOB) BP Libreville Gabon UMRED Health Training and Research Unit University of Iba Der Thiam of Thiès BP Thiès Senegal National Parasitic Diseases Control Program Ministry of Health Libreville Gabon MIVEGEC Univ. Montpellier CNRS IRD Montpellier France MERIT IRD Paris Cité University Paris France Department of Parasitology Noguchi Memorial Institute for Medical Research University of Ghana LG Accra Ghana School of Community Health Sciences Njala University Bo Sierra Leone Molecular and Cellular Biology Laboratory (LabMC) Biology Department University of Science and Technology of Masuku BP Franceville Gabon Ecology and Health Research Unit Interdisciplinary Center for Medical Research of Franceville BP Franceville Gabon Department of Zoology and Entomology Faculty of Natural and Agricultural Sciences University of the Free State Private Bag x13 Phuthaditjhaba Republic of South Africa Laboratory of Pharmacology and Improved Traditional Medicines Department of Animal Physiology Faculty of Science and Technology University of Abomey-Calavi BP Cotonou Benin The African Center of Excellence in Bioinformatics and Data-Intensive Sciences Infectious Diseases Institute College of Health Sciences Makerere University P. O Box Kampala Uganda Africa Centers for Disease Control and Prevention African Union Commission Roosevelt Street P.O. Box WKAddis Ababa Ethiopia Centre for Research in Infectious Diseases P.O. Box Yaoundé Cameroon Earth System Physics Department The Abdus Salam International Centre for Theoretical Physics Trieste Italy Africa Research Excellence Fund Charterhouse Street London EC1MHR UK

We look at the link between climate change and vector-borne diseases in low- and middle-income countries in Africa. The large endemicity and escalating threat of diseases such as malaria and arboviral diseases, intensified by climate change, disproportionately affects vulnerable communities globally. We highlight the urgency of prioritizing research and development, advocating for robust scientific inquiry to promote adaptation strategies, and the vital role that the next generation of African research leaders will play in addressing these challenges. Despite significant challenges such as funding shortages within countries, various pan-African-oriented funding bodies such as the African Academy of Sciences, the Africa Research Excellence Fund, the Wellcome Trust, the U.S. National Institutes of Health, and the Bill and Melinda Gates Foundation as well as initiatives such as the African Research Initiative for Scientific Excellence and the Pan-African Mosquito Control Association, have empowered (or are empowering) these researchers by supporting capacity building activities, including continental and global networking, skill development, mentoring, and African-led research. This article underscores the urgency of increased national investment in research, proposing the establishment of research government agencies to drive evidence-based interventions. Collaboration between governments and scientific communities, sustained by pan-African funding bodies, is crucial. Through these efforts, African nations are likely to enhance the resilience and adaptive capacity of their systems and communities by navigating these challenges effectively, fostering scientific excellence and implementing transformative solutions against climate-sensitive vector-borne diseases.

关键词： Climate change Vector-borne diseases Africa Environmental justice Research and development Pan-African funding initiatives

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Diversity of Macro Invertebrates of the River Rwizi in Western Uganda: A Citizen Science-BioBlitz Approach

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Open Journal of Ecology 2024年第4期14卷 343-365页

作者： John Bosco Nkurunungi Godwin Muhairwe Upton Nuwagira Nickson Araka nestor Mugabe Osbert Natwijuka Jeninah Atwebembeire Mbarara University of Science and Technology Mbarara Uganda Department of Directorate of Research and Graduate Training Makerere University Kampala Uganda

This study elucidates the pivotal role of citizen science-BioBlitz methodologies for rapid assessment of the macro-invertebrate taxa within the threatened River Rwizi of South-western Uganda. Utilizing a comprehensive mixed-methods approach, the investigation focused on six distinct river segments to demonstrate the efficacy of participatory citizen science-BioBlitz approaches conducted by experts, students and community volunteers. BioBlitz events included rigorous macro-invertebrate sampling at each of the selected sites along River Rwizi on nine occasions, incorporating collaborative taxonomic identification procedures involving experts, students, and the local community. Analyzing pollution concerns, diversity metrics, and community narratives yielded insights into river health and socio-ecological dynamics. A total of 43 macro-invertebrate families across 17 orders were documented with class Insecta dominating. Participants in BioBlitz events expressed predominantly positive sentiments, emphasizing satisfaction, education, and heightened awareness, besides negative sentiments rooted in historical mistrust. Intriguingly, the study unveiled an unforeseen trend in macro-invertebrate taxa richness, rising from upstream to urban sprawl and diminishing at peri-urban downstream sites. The study underscores the potential of citizen science-BioBlitz methodologies in advancing community science education and unraveling the intricate dynamics of threatened river ecosystems. The insights offered are invaluable for policymakers and conservationists seeking effective strategies to address challenges in the River Rwizi and comparable ecosystems. .

关键词： Diversity Macroinvertebrates Rwizi Citizen-Science-BioBlitz 6

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Optimization of the Pretreatment of the Mixture of Cassava Peelings and Pineapple Fibers Using Response Surface Methodology and a Process Simulator for the Bioethanol Production

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Energy and Power Engineering 2024年第2期16卷 79-96页

作者： Paul nestor Djomou Djonga George Elambo Nkeng Madjoyogo Hervé Sirma Ahmat Tom Thierry Tchamba Tchuidjang Department of Textile and Leather Engineering National Advanced School of Engineering of Maroua Maroua Cameroon Department of Civil Environmental and Architectural Engineering University of Padova Padova Italy Institut du Génie des Systèmes Industriels et textiles Ecole Polytechnique de Ouagadougou Ouagadougou Burkina-Faso Department of Energy Engineering University Institute of Technology University of Ngaoundere Ngaoundere Cameroon Department of Process Engineering National Advanced School of Agro-Industrial Sciences University of Ngaoundere Ngaoundere Cameroon

The increase in oil prices and greenhouse gas emissions has led to the search for substitutes for fossil fuels. In Cameroon, the abundance of lignocellulosic resources is inherent to agricultural activity. Production of bioethanol remains a challenge given the crystallinity of cellulose and the presence of the complex. The pretreatment aimed to solubilize the lignin fraction and to make cellulose more accessible to the hydrolytic enzymes, was done using the organosolv process. A mathematical modeling was performed to point out the effect of the temperature on the kinetics of the release of the reducing sugars during the pretreatment. Two mathematical model was used, SAEMAN’s model and Response surface methodology. The first show that the kinetic parameters of the hydrolysis of the cellulose and reducing sugar are: 0.05089 min-1, 5358.1461 J·mol-1, 1383.03691 min-1, 51577.6100 J·mol-1 respectively. The second model was used. Temperature is the factor having the most positive influence whereas, ethanol concentration is not an essential factor. To release the maximum, an organosolv pre-treatment of this sub-strate should be carried out at 209.08°C for 47.60 min with an ethanol-water ratio of 24.02%. Organosolv pre-treatment is an effective process for delignification of the lignocellulosic structure.

关键词： Bioethanol Cassava Peeling Pineapple Fibers Organosolv Process and Optimization

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Composite Panels from the Combination of Rice Husk and Wood Chips with a Natural Resin Based on Tannins Reinforced with Sugar Cane Molasses Intended for Building Insulation: Physico-Mechanical and Thermal Properties

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Journal of Materials Science and Chemical Engineering 2024年第2期12卷 19-30页

作者： Paul nestor Djomou Djonga Rosellyne Serewane Deramne Gustave Assoualaye Ahmat Tom Tégawendé Justin Zaida Department of Textile and Leather Engineering National Advanced School of Engineering of Maroua University of Maroua Maroua Cameroon Department of Chemistry Faculty of Science University of Bangui Bangui Central African Republic Department of Renewable Energy National Advanced School of Engineering of Maroua University of Maroua Maroua Cameroon Department of Energy Engineering University Institute of Technology University of Ngaoundere Ngaoundere Cameroon Institute of Industrial and Textile Systems Engineering Ecole Polytechnique de Ouagadougou Ouagadougou Burkina Faso

The objective of this work is to develop new biosourced insulating composites from rice husks and wood chips that can be used in the building sector. It appears from the properties of the precursors that rice chips and husks are materials which can have good thermal conductivity and therefore the combination of these precursors could make it possible to obtain panels with good insulating properties. With regard to environmental and climatic constraints, the composite panels formulated at various rates were tested and the physico-mechanical and thermal properties showed that it was essential to add a crosslinker in order to increase certain solicitation. an incorporation rate of 12% to 30% made it possible to obtain panels with low thermal conductivity, a low surface water absorption capacity and which gives the composite good thermal insulation and will find many applications in the construction and real estate sector. Finally, new solutions to improve the fire reaction of the insulation panels are tested which allows to identify suitable solutions for the developed composites. In view of the flame tests, the panels obtained are good and can effectively combat fire safety in public buildings.

关键词： Composite Panels Tannins Reinforced Sugar Cane Molasses Building Insulation Mechanical and Thermal Properties

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Multi-Scale Approach for Gold Targeting in Côte d’Ivoire Paleoproterozoic Rocks

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Open Journal of Geology 2024年第2期14卷 155-176页

作者： Martial Pohn Koffi Adingra Yao Augustin Koffi N’guessan nestor Houssou Zié Ouattara Tokpa Kakeu Lionel-Dimitri Boya Marc Ephrem Allialy Training and Research Unit in Earth Sciences and Mineral Resources Laboratory of Geology Mineral and Energy Resources University Felix HOUPHOU&#203T-BOIGNY Abidjan C&#244te d’Ivoire Training and Research Unit in Geological Sciences and Mining Department of Geology and Material Man University Man C&#244te d’Ivoire

The aim of this study is to contribute to better targeting of gold prospecting areas using geospatial information. To this end, 3 mining sites were selected for the study. They are: the Sénoufo belt (Barrick Gold mine), the Yaouré complex (Perseus Mining mine) and the South Fetêkro belt (Bonikro, Hiré and Agbaou mines). For this study, a multi-scale approach was carried out at regional, mine and microscopic levels. At the regional scale, a comparative analysis of 1:200,000 scale geological maps revealed that 3 main lithologies are regularly repeated on and around the various mining sites. These are: undifferentiated volcanics, metagranodiorites and metasiltites dominated by meta-arenites. Most of these lithologies are affected by undifferentiated faults generally oriented NE-SW, N-S, ENE-WSW and WNW-ESE. In addition, gold and manganese occurrences are present on all the sites studied. At the mine scale, radarsat-1 images processing indicate that the main mining sites are generally located near or at the intersection of lineaments-oriented NE-SW or N-S on the one hand and E-W or ENE-WSW or WNW-ESE or again NW-SE on the other. These mines are also located at the interface between zones of high and low lineament density. At the microscopic scale, petrographic studies of undifferentiated volcanic samples from the various sites indicate that they consist of andesites, meta-andesites and tuffs.

关键词： Gold Targeting Undifferentiated Volcanics Mineral Occurrences Lineaments Côte d’Ivoire

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Contribution of GIS to Soil Landscape Mapping by Multi-Criteria Analysis Using Weighting: The Case of the Square Degrees of M’Bahiakro (Centre) and Daloa (Centre-West) in Ivory Coast

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Open Journal of Geology 2024年第1期14卷 101-116页

作者： Guy Fernand Yao Derving Baka nestor Kouman Yao Kouakou Bala Mamadou Ouattara Kouadio Amani Jean Lopez Essehi Brou Kouame Albert Yao-Kouame Sustainable Soil Management and Water Control Program Central Laboratory Soils Water and Plants (LCSEP) National Agricultural Research Center (CNRA) Bouaké Ivory Coast Department of Soil Sciences Training and Research Unit for Earth Sciences and Mining Resources (UFR STRM) University Félix Houphou&#235t-Boigny of Cocody-Abidjan Abidjan Ivory Coast Department of Geography Training and Research Unit (UFR) Communication Environment and Society University Alassane Ouattara Bouaké Ivory Coast Soil Water and Geomaterials Sciences Laboratory (LS2EG) Earth Sciences and Mining Resources Training and Research Unit (UFR STRM) Félix Houphou&#235t-Boigny University Abidjan Ivory Coast

As part of the drive to improve coffee and cocoa production in Ivory Coast, studies are carried out to identify soils that are favourable for these crops. It is therefore necessary to orientate soil investigations based on reliable criteria that best discriminate soil cover. With this in mind, this study is being carried out to help improve survey methods by mapping soil landscapes. It uses GIS and weighted multicriteria analysis. To do this, satellite images were processed and the geological map of the square degrees of M’Bahiakro and Daloa was reclassified. The results show that relief is the main factor in soil landscape differentiation, with respective weights of 0.58 and 0.67 for the forest and pre-forest zones. In contrast, the weight of geological formation in soil landscape differentiation remains low (0.05 for the forest zone and 0.07 for the pre-forest zone). The criteria used on the base of aggregation sum methods have made it possible to formulate soil landscape mapping prediction functions according to agro-ecological environments in the humid intertropical zone. This is essential for the orientation of soil survey work. Nevertheless, other comparative methods, such as the coding mapping method, could provide elements for discussion to validate the models.

关键词： GIS Multi-Criteria Analysis Soil Landscapes M’Bahiakro Daloa Ivory Coast

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A Systematic Review of Cannabidiol Effects in Coronary Syndromes: Challenges to Clinical Translation

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Journal of Biosciences and Medicines 2024年第4期12卷 246-263页

作者： Mario E. Zuñiga-Ayala Alejandra Meaney-Martínez Alejandro Alcocer-Chauvet Vidal Gonzalez-Coronado nestor Rubio-Infante Gerardo Garcia-Rivas Department of Cardiology Instituto de Seguridad Social and Trabajadores del Estado (ISSSTE) Hospital Regional Primero de Octubre Mexico City Mexico Department of Interventional Cardiology Instituto de Seguridad Social y Trabajadores del Estado (ISSSTE) Hospital Regional Primero de Octubre Mexico City Mexico Instituto Tecnó logico de Monerrey Escuela de Medicina and Ciencias de la Salud C&#225tedra de Cardiolog&#237a and Medicina Vascular Monterrey Mexico

Background: Myocardial ischemia in addition to other several cardiac syndromes represent a pathological proinflammatory state alongside a complex cellular microenvironment that can be modified by using cannabinoids. Cannabidiol (CBD), a non-psychoactive compound of cannabis has been recently proposed as an immudomodulatory and cardioprotective drug. Objectives: In this systematic review we sought to clarify and summarize the clinical and preclinical evidence of potential benefit of the use of CBD in coronary syndromes. Methods: We conducted a systematic search and review according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and Review of Animal Data from Experimental Studies (CAMARADES) guidelines, in the electronic database from PubMed, Web of Science and Scopus up to April 2022 using predefined search terms. Pre-specified exclusion and inclusion criteria were considered, finally 11 articles were chosen to be included for this peer review. Results: Currently there are no good-quality clinical trials with the use of CBD in acute or chronic coronary syndromes. A total of 11 preclinical studies where prescreened and 5 demonstrated reproducible positive cardiovascular outcomes on in-vivo models treated with CBD. Mechanisms of CBD cardioprotection observed: 1) reduction in oxidative stress and inflammation, 2) activation of adenosine receptors and 3) increased expression of angiotensin type 2-receptor. Experimental models included ischemia/reperfusion injury, myocardial infarction, arrhythmias, and metabolic syndrome-like conditions. Conclusion: No clinical recommendation can be issued with the current evidence, on the use of CBD in acute and chronic coronary syndromes. Based on preclinical evidence, we considered there is enough evidence to propose the development of well-designed clinical trials that include CBD in the management of coronary syndromes.

关键词： Cannabis Cannabidiol Acute Coronary Syndromes Myocardial Infarction Myocardial Ischemia and Oxidative Stress

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