BiBliographie des Ensignants Chercheurs de l'Université Nationale des Sciences, Technologies, Ingénierie et Mathématiques
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Les publications dans l'entité : ENSBBA
La nouvelle decouverte sur la machine de Turing
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La nouvelle decouverte sur la machine de Turing
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Physico-chemical Characterization of Siliceous Sands from Houéyogbé in Benin Republic (West Africa): Potentialities of Use in Glass Industry
Physico-chemical characteristics of different silica sands from Houéyogbé municipality were evaluated. The results revealed that these sands contain a high percentage of silicon dioxide (SiO2), with a value approximately equal to 98.4 wt.%. Low Alumina
Investigation of aluminium bolted joint (HBJ) system behavior
Joints transfer forces propped by members to other sections of space frame. It support and connect braces with other members which provide restraints to members. In general, joints behavior is ideally rigid or ideally pinned (flexible) in typical design a
Stability of 6082-T6 aluminium alloy columns with H-section and rectangular hollow sections
This paper presents a column curve formula capable of producing accurate strengths for extruded members of 6082-T6 aluminium-alloys failing by flexural buckling under axial compression. The formula uses the Perry-type curve. The material properties are ex
An experimental and numerical study of a semi-rigid bolted-plate connections (BPC)
The aim of this paper is to evaluate the bending stiffness of a new bolted-plate joint for single-layer or double-layer reticulated shells. In order to investigate the performance of the joint, experimental tests and numerical simulations were undertaken.
Numerical Study and Design Method of a Single-Layer Spherical Reticulated Dome with Hollow Ball-Tube Bolted Joints
This paper presents a numerical study of spatial steel structures covering the design of a hollow ball-tube bolted joint system (HB) and its application to a single-layer spherical reticulated dome of type Kiewit 6 (K6). First, a so-called hollow ball-tub
Nonlinear Dynamics in a Chemical Reaction under an Amplitude-Modulated Excitation: Hysteresis, Vibrational Resonance, Multistability, and Chaos
This paper deals with the effects of an amplitude-modulated (AM) excitation on the nonlinear dynamics of reactions between four molecules. The computation of the fixed points of the autonomous nonlinear chemical system has been made in detail using the
Numerical Analysis of Behaviour of Large-Diameter Monopile for Offshore Wind Turbines
Very-large-diameter monopiles are widely used foundations for offshore wind turbines, despite the limited guidance in the codes of practice. In the present study, three-dimensional finite-element (FE) analyses were carried out to determine the static
Estimation of the Swelling Pressure of the Clayey Soils of the TCHI Depression in Benin for the Good Holding of the Equipment’s
The shrinkage-swelling phenomena of clayey soils as a function of the variation in water content and are manifested by disorders affecting mainly individual houses that are often not very rigid and superficially founded. The superficial foundations of inf
INFLUENCE OF WATER CONTENT ON SHEAR STRENGTH OF FINE SOILS AT HOUÉYOGBÉ IN BENIN
The phenomenon of shrinkage and swelling of fine soils is the cause of several disorders on the structures. Researchers are mainly interested in designing economical foundations that can cope with settlement and swelling movements in these soils. The obje
PREDICTION OF THE BREAKING STRESS OF CLAYEY SOILS FROM TCHI DEPRESSION TO BENIN
The phenomena of shrinkage and swelling of clay soils depending on the water content are manifested by disorders affecting mainly individual houses, often not very rigid and superficially founded. The superficial foundations of infrastructures built on sw
INFLUENCE OF DRYING-WETTING CYCLES ON THE COMPRESSIBILITY OF CLAY SOILS IN THE COMMUNE OF HOUEYOGBE
This article presents the results of an experimental laboratory study carried out with the odometer and the Richards press on a class A3 clay soil sample that had undergone drying-wetting cycles. These tests allowed us to analyze in fine the influence of
Experiments and 3D DEM of Triaxial Compression Tests under Special Consideration of Particle Stiffness
Discrete element modelling is commonly used for particle-scale modelling of granular or particulate materials. Developing a DEM model requires the determination of a number of micro-structural parameters, including the particle contact stiffness and the
La nouvelle decouverte sur la machine de Turing
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor i
Techniques agro
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Linear stability analysis of Poiseuille flow in porous medium with small suction and injection
This paper analyses the effect of small injection/suction Reynolds number, permeability parameter and wave number on the stability of Poiseuille fluid flow in a porous medium between two parallel horizontal stationary porous plates. The main objective o
Torque ripple minimization in switch reluctance Motor using model predictive control for water pumping application
This paper presents the torque ripple minimization in switched reluctance motor (SRM) for water pumping. The model predictive control (MPC), one of the rugged control, is used to minimize this torque ripple. According to the receding horizon, the MPC pred
Magnetic properties of a tri-layer superlattice: Mean field study and Monte Carlo simulation
Magnetic properties of a superlattice that consists of three square layers with Ising spins = 1/2 , s = 1 and q = 5/2 , are investigated by means of standard Monte Carlo simulations and Mean Field Theory. The Hamiltonian model comprises contributions of
Critical phenomena in a two-dimensional ferrimagnetic system: Monte Carlo and Mean-Field Analysis
The critical, first order, and spin compensation behaviors of a ferrimagnetic Ising system, consisting of spins S = 3 / 2 and Q = 5 / 2 alternating on a square lattice, have been studied by Monte Carlo (MC) simulations and Mean-Field Theory (MF). The syst
Application of Neural Networks to forecast photovoltaic power in the framework of the valorisation of renewable energies in Benin Republic
This paper aims at applying neural networks to the prediction of the output power of a photovoltaic installation in the framework of the valorisation of renewable energies in the Benin Republic. This prediction was made by using a hybrid neural network (N
Modélisation des réactions de pyrolyse des coques de coco, des déchets de bois et de la paille : Application à la prévision de la composition molaire des gaz de gazéification
La présente étude propose le couplage de méthodes numériques et expérimentales pour la prévision de la composition molaire du mélange gazeux issu de la gazéification de la biomasse. Elle prend en compte les différentes étapes de la gazéificatio
Physicochemical Variability and Biodiesel Potential of Seed Oils of Two Hibiscus sabdariffa L. Phenotypes
Considerable interest is being focused on vegetable oils as fuel. Due to their characteristics being close to diesel and their renewable potential, studies recommend their use for agricultural applications. Hibiscus sabdariffa var. sabdariffa is widely st
Ethyl esters of fatty acids and thermophysical properties of biodiesel derived from Ceiba pentandra L. seed oil acclimatized in Benin and biodiesel-diesel blends
Background: Fatty acid composition and knowledge of properties such as density and kinematic viscosity are paramount both for optimizing diesel engine operation and for specification of fuel quality. The objective present work is to study the thermop
Proposition of a Time Transform for the Detection of Cardiac Sounds in the Phonocardiogram of a Healthy Patient
Collecting patient health data is a task that has become very common today. Indeed, thanks to everyday objects such as watches, cell phones, etc., collecting data on a patient is no longer a very complex task. However, to collect this data with such simpl
Proposition of a Time Transform for the Detection of Cardiac Sounds in the Phonocardiogram of a Healthy Patient
Collecting patient health data is a task that has become very common today. Indeed, thanks to everyday objects such as watches, cell phones, etc., collecting data on a patient is no longer a very complex task. However, to collect this data with such simpl
Modulation RZ-DPSK optique pour le réseau d’accès optique passif multiplexé en longueurs d’onde (WDM-PON)
Ce travail porte sur l’étude des performances du format de modulation RZ-DPSK (Return to Zero Differential Phase-Shift Keying) dans un système WDM-PON (Wavelength Division Multiplexing in Passive Optical Network) à un débit de 40 Gb/s par longueur d
Proposal of A VCSEL Datasheet Model for Optical Systems simulations
With the proliferation of voracious bandwidth-intensive multimedia applications, deployed optical sources within optical LANs in data centers must transmit data at very high data rates over short ranges and at a lower cost. To do this, among several optic
« Étude des performances de la DHT-OFDM dans un canal optique IM/DD : application à la transmission d’une image
La simplicité des systèmes d’émission et de réception est une priorité de nos jours pour la diminution du coût de déploiement des systèmes de transmission. Dans le cas des systèmes basés sur l’OFDM, des études ont montré que l’utilisatio
ETUDE ET SIMULATION DES TECHNIQUES DE MULTIPLEXAGE OFDM POUR UNE LIAISON OPTIQUE DU TYPE IM/DD
Dans un contexte de multiplexage OFDM sur une liaison optique de type IM/DD, le présent document rend compte de la sensibilité au bruit des techniques ACO-OFDM et DCO-OFDM pour plusieurs niveaux de codage QAM et pour plusieurs tailles de symboles OFDM.
Impact d’une modulation duale sur les performances d’une liaison optique point à point IM/DD
Le présent document présente la technique de modulation duale Fréquence - Amplitude dans le cas d’une liaison optique du type IM-DD. Ce travail révèle que la modulation duale Fréquence - Amplitude permet de générer un signal à bande latérale u
Comparative study of multiplexing technics DHT-OFDM and DFT-OFDM for IM / DD Optical Link
This document makes a comparison between two techniques for generating orthogonal subcarriers named DFT (Discrete Fourier Transform) and DHT (Discrete Hartley Transform) for the implementation of OFDM (Orthogonal Frequency Division Multiplexing) in an IM
Implémentation de l’OFDM dans les liaisons optique IM/DD
Dans cet ouvrage, les réflexions portent sur l'intégration de la technologie OFDM dans les liaisons optiques du type IM/DD (Intensity Modulation / Direct Detection). A cet effet, la DFT-OFDM (Discret Fourier Transform-Orthogonal Frequency Division Multi
Toward Bottom-up Optoelectronic Design of Increasing Fluorination Low Bandgap in PDTPQX-types Copolymers for Organic Photovoltaics Devices
Abstract: Organic photovoltaic performance has been investigated about the fluorination effects as one part on the optoelectronic properties. The quantum chemical accuracy of the optoelectronic and structural properties based on D-A (Donor-Acceptor) conju
A comprehensive Analysis and Review on Electrical Machines in Wind Energy Conversion Systems
Wind energy conversion systems (WECS) have developed rapidly in recent years in terms of capacity and wind turbines design. This development led to improve power quality, to reduce the costs and increase the energy yield. WECS are expected to be reliable,
Torque Ripple Minimization in Switch Reluctance Motor Using Model Predictive Control for Water Pumping Application
This paper presents the torque ripple minimization in switched reluctance motor (SRM) for water pumping. The model predictive control (MPC), one of the rugged control, is used to minimize this torque ripple. According to the receding horizon, the MPC pred
Digital resolution of the system of governing equations of the natural Magnetohydrodynamic convection phenomenon
In this study, hydrodynamic and magn etic anisotropies as buoyancy -driven convection effects in a two-dimens ion al horizontal cavity are investigated analytically . The porous cavity filled with a porous medium is heated isothermally by the sides and it
SMC control applied to a buck converter: comparison to a PID Controller
This paper aims to control the output voltage of a buck converter using a Sliding Mode Controller (SMC) on an AVR experimental setup. The controller has been implemented with SIMULINK followed by simulations in order to check its convergence and to compar
MAGNETICS REDUCERS STUDY AND THEIR INSERTION IN PERMANENT MAGNET SYNCHRONOUS MACHINES
In this article, we present the magnetic gears and more precisely the concentric magnetic reducer as a replacement for the mechanical gears given the limits of the latter. These limits are due to several factors such as friction and its inevitable lubrica
Cotton Stem Fibers and Natural Binders for the Manufacture of Thermal Insulation Panels: State of the Art of the Last Decade
This article is a review of the state of the art of the last decade on new materials based on cotton stem fibers (CTF) and natural binders such as Grewia Venusta Fresen bark, hulls fruits of Parkia Biglobosa, calyces of Bombax Costatum, etc. The results
Hot Plate Method with Two Simultaneous Temperature Measurements for Thermal Characterization of Building Materials
This paper presents a study of the hot plate method with two simultaneous temperature measurements, on the heated and unheated faces of a sample to characterize. The thermal properties of polyvinyl chloride, plaster and laterite were considered to be a
INVESTIGATION ON THE USE OF THE CEMENT MORTAR CONTAINING BANANA FIBERS AS THERMAL INSULATOR IN BUILDING
This paper dealed with the valorization of Benin natural resources through the development of new composite materials made of banana fibers-cement mortar which could be used as thermal insulator in building. The developed composites were formulated and ma
Caractérisation thermique des mortiers de ciment dopés en fibres de coco par la méthode du plan chaud asymétrique à une mesure de température
L’étude réalisée concerne la valorisation des déchets agricoles pour l’élaboration de matériaux biosourcés utilisables comme isolants dans l’habitat. Le présent article est consacré à l’analyse de l’influence de l’incorporation des
Conceptions of Vibrational Signatures Based on Chiral/Helical Functionalized Helicenes Nanostructures: Analyzed of Normal and Identical Modes
Abstract: Optoelectronics properties as helical molecular fingerprints have been investigated on a set of Helicenes molecules, which form a particular class of compounds and exhibit both π-electron delocalization and chiral properties. In this paper, we
Nonlinear Dynamics and Active Control in a Liénard-Type Oscillator under Parametric and External Periodic Excitations
In this paper, nonlinear dynamics and active control of a Liénard-type oscillator under parametric and external excitations are investigated. The amplitude of the harmonic oscillations and the criteria for the appearance of the Melnikov chaos are deri
Chaotic Dynamics of a Mixed Rayleigh–Liénard Oscillator Driven by Parametric Periodic Damping and External Excitations
In this paper, chaotic dynamics of a mixed Rayleigh–Liénard oscillator driven by parametric periodic damping and external excitations is investigated analytically and numerically. -e equilibrium points and their stability evolutions are analytically an
Regular and Chaotic Oscillations in a Modified Rayleigh-Liénard System under Parametric Excitation
In this paper, the regular and chaotic oscillations in a modified Rayleigh-Liénard system under parametric excitation are studied. Two subharmonic resonant states are generated using the multiple time scales method and the effects of the system parameter
CARACTERISTIQUES DES BRIQUETTES COMBUSTIBLES DE POUSSIERES DE CHARBON DE BOIS ET DES PAPIERS/CARTONS
Ce travail vise à étudier la faisabilité technique de la valorisation énergétique de poussière de charbon de bois et des papiers/cartons afin de réduire le phénomène de déforestation et la dépendance de la biomasse pour la consommation éner
CARACTERISTIQUES DES BRIQUETTES COMBUSTIBLES DE POUSSIERES DE CHARBON DE BOIS ET DES PAPIERS/CARTONS
Ce travail vise à étudier la faisabilité technique de la valorisation énergétique de poussière de charbon de bois et des papiers/cartons afin de réduire le phénomène de déforestation et la dépendance de la biomasse pour la consommation éner
3D Finite element analyses of suction caisson foundations for offshore wind turbines in drained sand
In the present study, three-dimensional finite element analyses are performed to assess load-bearing capacity of suction caisson foundations under drained condition for offshore wind turbines. The ultimate capacity for the Ultimate Limit State and the S
Using semi‑latin square design for screening and comparison of local and improved Zea maize varieties tolerant to climate change in centre of Benin (West Africa)
The demographic pressure in Benin has led to an increase in demand for cereals, in particular maize (Zea mays L.), which constitutes the staple diet for the populations. Yet, in this context of climatic variability, the environmental conditions greatly li
Comparative Genomics and Identification of an Enterotoxin-Bearing Pathogenicity Island, SEPI- 1/SECI-1, in Staphylococcus epidermidis Pathogenic Strains
Staphylococcus epidermidis is a leading cause of nosocomial infections, majorly resistant to beta-lactam antibiotics, and may transfer several mobile genetic elements among the members of its own species, as well as to Staphylococcus aureus; however, a
Comparisons of sampling methods for assessing intra‑ and inter‑accession genetic diversity in three rice species using genotyping by sequencing
To minimize the cost of sample preparation and genotyping, most genebank genomics studies in self-pollinating species are conducted on a single individual to represent an accession, which may be heterogeneous with larger than expected intra-accession
Comparisons of sampling methods for assessing intra‑ and inter‑accession genetic diversity in three rice species using genotyping by sequencing
To minimize the cost of sample preparation and genotyping, most genebank genomics studies in self-pollinating species are conducted on a single individual to represent an accession, which may be heterogeneous with larger than expected intra-accession
Species delimitation in the African tree genus Lophira (Ochnaceae) reveals cryptic genetic variation
Species delimitation remains a crucial issue for widespread plants occurring across forest-savanna ecotone such as Lophira (Ochnaceae). Most taxonomists recognize two parapatric African tree species, widely distributed and morphologically similar but occu
Breeding system, gene dispersal and small-scale spatial genetic structure of a threatened food tree species, Pentadesma butyracea Sabine (Clusiacae) in Benin.
Pentadesma butyracea Sabine, a rain forest food tree species, plays a vital role in the socio-economic livelihood of some West African rural communities due to its various products. However, its scattered populations are threatened in Benin. Defining appr
Combination of the Leaves of Annona muricata, Launaea taraxacifolia and Tridax procumbens: An Herbal Medicine for the Prevention and Treatment of Hypertension, Atherosclerosis and Cardiovascular Diseases
High blood pressure and cardiovascular diseases are the non communicable diseases that cause the most deaths in Africa. They affect the most disadvantaged sections of society who have no other choice but to treat themselves with plants. In the purpose o
Evaluation of the Preventive and Therapeutic Activities of Tridax procumbens against Hyperglycemia and Hyperlipidemia Induced in Wistar Rats
From the Asteraceaes family, Tridax procumbens is a wild species frequently found in fields, meadows and roadsides. It is traditionally used to treat yellow fever, typhoid fever, high blood pressure and diabetes. In this work we used the hydro-ethan
Phytochemical Study and Evaluation of Cytotoxicity, Antioxidant and Hypolipidemic Properties of Launaea taraxacifolia Leaves Extracts on Cell Lines HepG2 and PLB985
Launaea taraxacifolia is a leafy vegetable of the family of Asteraceae (Compositae) found in several countries in West Africa including Ghana, Benin and Nigeria. The plant leaves are eaten either fresh as salad or cooked as sauces. They are also consu
EFFECTIVE IN VIVO CHOLESTEROL AND TRIGLYCERIDES LOWERING ACTIVITIES OF HYDROETHANOLIC EXTRACT OF LAUNAEA TARAXACIFOLIA LEAVES
Launaea taraxacifolia is a leaf vegetable consumed in several African countries including Nigeria, Ghana and Benin. It is eaten as salad, sauce and infusion to fight against certain diseases including liver diseases, diabetes and hypertension. The h
EFFECT OF TRIDAX PROCUMBENS HYDROETHANOLIC EXTRACT ON WISTAR RATS BLOOD GLUCOSE, TOTAL CHOLESTEROL, AND TRIGLYCERIDES
The hypoglycemic, hypotensive and antioxidant effects of Tridax procumbens have been fundamentally studied in India where the plant is widely used for its medicinal properties. In this work, we treated Wistar rats with two doses of leaves and stems hydr
Chemical Profile, Cytotoxicity Anti-Radical and Hypolipidemic Activities of Tridax Procumbens of Benin.
Tridax procumbens, a traditional medicinal plant, was analyzed in the present work for its antioxidant power through its free radicals scavenging capacity using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) test and its potential anti ROS (Reactiv Oxygen Speci
Hypotensive Activity of Tridax Procubens hydro ethanolic extract: Roles of transport of sodium and potassium in Rat Wistar
In Africa in general and Benin in particular the population is increasingly confronted with several pathologies such as hypertension. Even though modern medicine is well developed, this population uses traditional medicine because of its low purchasing po
Anti-sickling activity of Daniellia oliveri (Rolfe) Hutch. & Dalziel. bark aqueous extracts in the management of sickle cell disease in Benin.
Objective: Daniellia oliveri (African copaiba balsam tree) is a plant used in Benin in the treatment of sickle cell disease. It is a traditional plant, which not all virtues have been scientifically proved. This work was carried out to evaluate the action
Antidiabetic Activity of Aqueous Extracts of Laurus nobilis, a Spice Used by Beninese Traditional Therapists
All over the world, humans developed knowledge about the use of medicinal plants to treat all kinds of diseases. Spices were included. This work aimed to evaluate the hypoglycemic property Laurus nobilis, a spice used by traditional therapists in Benin
Anti-sickling activity of Daniellia oliveri (Rolfe) Hutch. & Dalziel. bark aqueous extracts in the management of sickle cell disease in Benin.
Objective: Daniellia oliveri was a plant used in Benin in the treatment of sickle cell disease. It was a traditional plant which all virtues did not be scientifically proven. This work was carried out to evaluate the action of the barks of Daniellia oliv
Evaluation of the Anti-Sickle Cell Activity of Uvaria Chamea P. Beauv. Roots Aqueous Extract
Sickle cell disease was a very common hemoglobinosis in tropical countries. Several plants were used in traditional Beninese medicine to relieve sickle cell crises. The present work was carried out to test the efficiency of Uvaria chamea roots aqueous
Phytochemical study of extracts from the leaves of Senna alata (L.) Roxb. (Leguminosae-Caesalpinioideae) and Lantana cumara L. (Verbenaceae), two main plants traditionally used to treat skin infections in Benin
In Benin, two medicinal plants are commonly used by rural populations to treat skin infections. Very few investigations are carried out on them against skin infections, despite their increased use. The present study is carried out on these two anti-inf
Bactericidal effect of the aqueous extract of the leaves of Lantana camara L. (Verbenaceae), a plant used in Benin in the treatment of skin infections
Objective Lantana cumara was a tropical plant whose leaves were used in Benin in traditional medicine to treat skin infections. This work aimed to test in vitro the effectiveness of the aqueous extract of Lantana cumara leaves in the treatment of these
Optimization of roasting conditions for preservation of nutritional quality of Terminalia catappa almonds by response surface methodology
Le badamier est principalement utilisé comme arbre d’ornement sur le long des artères des voies urbaines du Bénin malgré les richesses imparables de ces fruits. Les amandes issues de ces fruits sont potentiellement riches en éléments nutritifs mai
Contribution of multiple cropping systems to Greenhouse Gas mitigation in the municipality of Abomey-Calavi in Southern Benin
In the world at large, while agricultural yields are increasing with constant land area, in Sub-Saharan Africa, more land is needed to increase production. In this region of Africa, agriculture therefore remains essentially extensive and contributes to en
Variability of Seed Germination and Seedling Growth Potential of Ricinodendron heudelotii (Euphorbiaceae) at Fine Scale in Southern of Benin.
Ricinodendron heudelotii (Euphorbiaceae) is an oilseed plant with high socioeconomic value. Unfortunately, the seed’s tegumentary dormancy causes low germination and severely limits its large-scale spread. Germination and juvenile growth of eleven prove
Floral morphology and pollination system of Syzygium guineense (Willd.) DC. subsp. macrocarpum (Engl.) F. White (Myrtaceae), a subspecies with high nectar production.
The floral morphology and pollination of S. guineense subsp. macrocarpum were investigated on ten trees selected for a study of floral phenophases in the natural forest of Bassila, located in the Sudano-Guinean zone (Benin). For the floral analysis, the t
Faïnou M., Ewédjè E. B.K., Adéoti K., Djèdatin G., Affokpon A., Baba Moussa F. and Toukourou F. (2018). Diversity of local varieties of banana and plantain cultivated in Benin.
Banana and plantain are popular fruits considered as major staple foods, and provide significant income to farming communities. A handicap to their development and production remains access to quality suckers. However, their diversity is still unknown in
Reproductive biology of Pentadesma butyracea (Clusiaceae) source of a valuable non timber forest product in Benin.
Background and aims – The main reproductive traits of the native African food tree species, Pentadesma butyracea Sabine (Clusiaceae), which is threatened in Benin and Togo, were examined in Benin to gather basic data necessary to develop conservation st
Diversité des espèces d’arbres utilisées dans les métiers du bois Cas de la fabrication des mortiers et pilons au Centre-Bénin
La présente étude réalisée au centre du Bénin a porté sur la diversité des espèces utilisée pour la fabrication des mortiers et pilons. Elle vise à faire l’état des lieux de la diversité de ces espèces au Centre-Bénin. Des enquêtes ethnob
Ethnobotany of Aromatic Plants used by Phytotherapists in the District of Glazoue, Ouesse and Save in Benin
Aromatic and medicinal plants (AMP) are flora with a fragrant essence. The aim of this study is to identify the aromatic plants used by herbalists in three district of the Departement des Collines. The method of data collection is based on ethnobotanical
Ethnobotanique de Gardenia erubescens Stapf & Hutch Département des Collines au Bénin
L’ethnobotanique de Gardenia erubescens a été abordée dans les communes de Dassa-Zoumé, Glazoué et Savè. Elle porte sur les connaissances des populations à travers l’utilisation des différentes parties de l’espèce en vue de sa valorisation
Caractérisation de l’habitat des champignons en milieu naturel et en plantation au Bénin
Objectif : Plusieurs facteurs aussi bien abiotiques que biotiques interviennent dans la décomposition de la litière forestière. Cette étude vise à inventorier les caractéristiques édaphiques et phytosociologiques prévalant dans la forêt dense sem
Effect of population density on oviposition, development, and survival of Alloeocranum biannulipes (Hemiptera: Reduviidae) preying on Dinoderus porcellus (Coleoptera: Bostrichidae)
Background: Alloeocranum biannulipes Montr. and Sign.(Hemiptera: Reduviidae) is a predator present in stored yam chips and a promising biological control agent against Dinoderus porcellus Lesne (Coleoptera: Bostrichidae). Numerical responses of A. biannul
Haematological evaluation of Wistar rats exposed to chronic doses of cadmium, mercury and combined cadmium and mercury
Cadmium and mercury present in the environment, cause blood disorders. This study was conducted to evaluate the influence of cadmium, mercury and their combination on hematological parameters of Wistar rats. For this purpose, two different doses of ea
Acute Toxicity of Mercury (HgCl2) to African Catfish, Clarias gariepinus
In order to assess the acute toxicity of mercury on Clarias gariepinus, 108 fish of mean weight 51.27 g ± 2.01 and mean length 20. 2 cm ± 0.72 were divided into six groups of six fish each. The different groups were exposed to the different concentrat
Acute Toxicity of Mercury (HgCl2) to African Catfish, Clarias gariepinus
In order to assess the acute toxicity of mercury on Clarias gariepinus, 108 fish of mean weight 51.27 g ± 2.01 and mean length 20. 2 cm ± 0.72 were divided into six groups of six fish each. The different groups were exposed to the different concentrat
Volatiles from Maruca vitrata (Lepidoptera, Crambidae) host plants influence olfactory responses of the parasitoid Therophilus javanus (Hymenoptera, Braconidae, Agathidinae)
Cette étude a évalué l’attraction du parasitoïde exotique Therophilus javanus par les substances volatiles produites par trois espèces de légumineuses endommagées par son hôte Maruca vitrata. Dans cette étude, les effets des odeurs émises pa
Mathematical prediction of the Jatropha curcas L. plant yield: comparing Multiple Linear Regression and Artificial Neural Network Multilayer Perceptron models
The aim of this study was to predict Jatropha curcas plant yield through an Artificial Neural Network (ANN) Multi-Layer Perceptron (MLP) model. The predictive ability of the developed model was tested against the Multiple Linear Regression (MLR) using pe
Modelling current agro-ecological zones for the cultivation of Dioscorea dumetorum (Kunth) Pax, a neglected and underutilized yam species in Benin (West Africa)
Yam species (Dioscorea spp.) constitute important staple foods for local communities in Sub-Saharan in Africa. Among yam species, Dioscorea dumetorum (Kunth) Pax, commonly consumed, has been reported to be among the most nutritious and well-appreciated lo
Using semi‑latin square design for screening and comparison of local and improved Zea maize varieties tolerant to climate change in centre of Benin (West Africa)
The demographic pressure in Benin has led to an increase in demand for cereals, in particular maize (Zea mays L.), which constitutes the staple diet for the populations. Yet, in this context of climatic variability, the environmental conditions greatly li
Radical Scavenging and Antiplasmodial Activity of Polygonum senegalense of Benin
Drug resistance developed by Plasmodium falciparum doubled their rates of infection in the last two decades and encourages efforts to further explore natural materials that can be used as a new antimalarial drug. Thus, present study aims to evaluate "in
Antimicrobial resistant bacteria in poultry excrement sold as manure in local markets in Benin
Enterobacteria are host bacteria found in the gut of all warm-blooded animals. Many of these can be found in poultry faeces and can cause zoonotic diseases. This study was aimed to characterize Enterobacteria other than Salmonella from faeces of poult
Characterization of Human Type C Enterotoxin Produced by Clinical S. epidermidis Isolates
Staphylococcal Enterotoxins (SEs) are superantigens (SAg) originally produced by S. aureus, but their presence in coagulase negative staphylococci (CNS) has long been suspected. This study aims to better characterize a novel C-like enterotoxin expressed
Pathogenic features of clinically significant coagulase-negative staphylococci in hospital and community infections in Benin
Chimène Nanoukon, Xavier Argemi, Frédéric Sogbo, Jeanne Orekan, Daniel Keller, Dissou Affolabi, Frédéric Schramm, Philippe Riegel, Lamine Baba-Moussa, Gilles Prévost
Safety study of the aqueous extract of the leaves of Lantana cumara L. (Verbenaceae), a plant used in Benin in the treatment of infections
Subject description : In Benin, many medicinal plants were used by the populations for the treatment of infections. However, these herbal remedies should be used with great caution as they can be toxic. Objectives: In this perspective, this work consiste
Endophytic colonization of tomato plants by Beauveria bassiana Vuillemin (Ascomycota: Hypocreales) and leaf damage in Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larvae
The endophytic capacity of Beauveria bassiana Vuillemin isolates in 2 tomato varieties and their effects on damage and survival of the tomato fruit worm Helicoverpa armigera Hubner larvae were studied. The bioassays consisted of sowing seeds of 2 tomato c
Management of the legume pod borer Maruca vitrata Fabricius (Lepidoptera: Crambidae) with field applications of the entomopathogenic fungus, Beauveria bassiana and a mixed formulation of the baculovirus MaviMNPV with emulsifiable neem oil
The present study assessed the effectiveness of the entomopathogen fungus Beauveria bassiana in comparison with neem oil combined with the baculovirus MaviMNPV and a synthetic insecticide deltamethrin for the control of Maruca vitrata Fabricius under fiel