Publications (5607)
ARTICLE
Antioxidant and antibacterial activities of Combretum nioroense Aubrév. ex Keay (Combretaceae).
TH Coulidiati, H Millogo-Kone, A Lamien-Meda, CE Lamien, M Lompo, M Kiendrebeogo, S Bakasso, M Yougbaré-Ziébrou, J Millogo-Rasolodimby, OG Nacoulma
n this study, the antioxidant and antibacterial activities of acetone extract, ethyl acetate, n-butanol and n-hexane fractions of acetone extract from leaves of Combretum nioroense Aubrév. ex Keay were investigated. The total phenolics and total flavonoids contents in the fractions and acetone extract were determined by spectrophotometric meth(...)
combretum niorense, total phenolics, total flavonoids, antioxidant, antibacterial
ARTICLE
Optimization of the combustion of blends of domestic fuel oil and cottonseed oil in a non-modified domestic boiler.
Tizane Daho, Gilles Vaitilingom, Oumar Sanogo
This study characterizes combustion of blends of DFO (domestic fuel–oil) and refined cottonseed oil produced in Burkina Faso at different percentages in a non-modified DFO burner by determining its overall
performance (consumption and thermal capacity) and gas emissions (CO, CO2, O2, NO, NOx, SO2). The
physical and chemical characteristics o(...)
Pure vegetable oil Blends Burner Combustion Emission
ARTICLE
Experimental determination of some micro-structural and hydrous properties of a terra cotta and modelisation of hygrothermal transfers
D. BATHIEBO
This experimental study present some micro-structural and thermo-hydrous properties of terra cotta. A tube, built from this porous material, bathes in a tank filled with water. The internal surface of the wall carries a water film which evaporates by forced convection of hot and dry air, allowing the storage of negative kilocalories. The form(...)
Mots clés non renseignés
ARTICLE
Comportement à la corrosion des alliages d’aluminium recyclés pour la confection de marmites
Tambi Ramdé∗ , Lucien Bonou, Boubié Guel, Jean Boukari Legma
La composition chimique et la microstructure d’alliages d’aluminium recyclés pour la fabrication de marmites ont été déterminées par méthode spectrométrique d’émission par ICP et la diffraction de rayons X (DRX). Le comportement à la corrosion aqueuse de ces alliages a été étudié dans une solution de Na2SO4, 0,5 M par le suivi de l’évolution d(...)
alliages d’aluminium recyclés, corrosion, polarisation potentiodynamique
ARTICLE
Artificial signals addition for reducing PAPR of OFDM systems
Guel Desire and Palicot Jacques
One of the major drawbacks of OFDM modulation is the large envelope fluctuations which either result in an inefficient use of high power amplifiers (HPA) or decreased transmission system performance. Peak-to-Average Power Ratio (PAPR) is a very well known measure of the envelope fluctuations and has become the cost function used to evaluate an(...)
Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Artificial Signals
ARTICLE
Exergy efficiency applied for the performance optimization of a direct injection compression ignition (CI), engine using biofuels.
Yao Azoumah, Joel Blin, Tizane Daho.
The need to decrease the consumption of materials and energy and to promote the use of renewable
resources, such as biofuels, stress the importance of evaluating the performance of engines based on the
second law of thermodynamics. This paper suggests the use of exergy analysis (as an environmental
assessment tool to account wastes and dete(...)
Mots clés non renseignés
ARTICLE
« Chants, musique et danse dans l’oeuvre d’Elechi Amadi »
KIEMA, Alfred
cet article
Chants, musique, danse
ARTICLE
Convective drying characteristics of Amelie mango (Mangifera Indica L. cv.‘Amelie’) with correction for shrinkage
D. BATHIEBO
Drying characteristics of Amelie mango were investigated through slices shrinkage behaviour at 50, 60 and 70° C and drying kinetics at temperatures ranging from 50 to 70° C and for slices of 2.5, 5 and 10 mm thick. Results showed that mango slices shrinkage was less influenced by temperature and best fitted by the linear model of volume additi(...)
Mots clés non renseignés
ARTICLE
Les pathologies bucco-dentaires dans les consultations de routine au Centre Médical du Camp Général Aboubacar Sangoulé Lamizana à Ouagadougou.
GUIGUIMDE Wendpouiré Patrice Laurent, BAKIONO Fidèle, KABRE Armand Claude, OUEDRAOGO Alfred Marie Parfait
Contexte : Les maladies bucco-dentaires constituent un problème majeur de santé publique au Burkina Faso. Notre étude a pour objectif d’analyser les pathologies bucco dentaires rencontrées et leur association avec les facteurs sociodémographiques et sanitaires des patients.
Méthodes : Il s’agit d’une étude rétrospective à partir d’un échantil(...)
consultation de routine, pathologie buccodentaire, service de santé des Armées, Burkina Faso
ARTICLE
Mutualism between euryhaline tilapia Sarotherodon melanotheron heudelotii and Chlorella sp. Implications for nano-algal production in warmwater phytoplankton-based recirculating systems
Gilles S.; Lacroix G., Corbin D., Bâ N’G., Luna C I., Nandjui J., Ouattara A., Ouédraogo O., and Lazzaro X.
The West-African euryhaline tilapia, Sarotherodon melanotheron heudelotii shift from visually feeding on
zooplankton when juveniles to mostly filter feeding on phytoplankton when adults. When reared using
an appropriate ration in intensive aquaculture systems, S. m. heudelotii also consume algal-based detritus,
and contribute to sediment mi(...)
Mots clés non renseignés
ARTICLE
Electrogenerated base-promoted synthesis of dithiocarbamate acid esters and 3-(N-Substituted-amino)-2-cyanodithiocrotonates from primary or secondary amines...
I. TAPSOBA
Electrogenerated cyanomethyl anion promotes the reaction between primary or secondary amines, carbon disulfide, and alkyl or benzyl halide. Secondary amines are converted to alkyl or benzyl dithiocarbamates, whereas primary amines give N-substituted alkyl or benzyl 3-amino-2-cyanodithiocrotonates. The mechanisms are discussed.
Mots clés non renseignés
ARTICLE
DETERMINATION DES PARAMETRES ELECTRIQUES D’UNE PHOTOPILE SOUS ECLAIREMENT MONOCHROMATIQUE EN MODULATION DE FREQUENCE, A PARTIR DES DIAGRAMMES DE BODE ET DE NYQUIST
M. NDIAYE , Z. NOUHOU BAKO, I. ZERBO, A. DIENG, F. I. BARRO, G. SISSOKO
Nous présentons dans cet article une méthode de détermination des paramètres électriques d’une photopile monofaciale au silicium en régime dynamique fréquentiel sous éclairement monochromatique. A partir de la représentation de Nyquist de l’impédance dynamique de la photopile, nous déterminons la résistance série Rs et la résistance shunt Rsh(...)
Photopile, impédance, diagramme de Bode, représentation de Nyquist, résistance série, résistance shunt, inductance, capacité, phase
ARTICLE
Approximation of the average power variation for Geometric adding signal approach of PAPR reduction in context of OFDM signals
Désiré Guel, Jacques Palicot
One of the major drawbacks of adding signal techniques of reducing peak to average power ratio (PAPR) is the variation of the average power of the transmit signal that undoubtedly degrades the performance of transmission. In this paper, assuming that the baseband OFDM signal is characterized as a complex Gaussian process, we derive an approxim(...)
Mots clés non renseignés
ARTICLE
Volatile constituents, antioxidant and antibacterial properties of Daniella Klainei Pierre ex A. Chev. essential oil
Jean Koudou, Louis-Clément Obame , Prosper Edou , Ismael Bassolé , François Eba , Gilles Figueredo , Alfred S. Traore and Jean-Claude Chalchat
The water-distilled oil obtained from rhizomes of Daniella Klainei Pierre ex A.Chev (Caesalpiniaceae)
from Gabon was examined by gas chromatography (GC) and gas chromatography/mass spectrometry
(GC/MS). The major constituent is myrcene (55.42%) along with -pinene (5.39%), -humulène (8.09%)
and Germacrene-D (6.06%). The essential oil posse(...)
Daniella Klainei, caesalpiniaceae, essential oil, antioxidant
ARTICLE
Frequency based asymptotic distribution of the PAPR for geometric adding signal approach in OFDM signals context
Guel, D. and Palicot, J. and Bellanger, J.-J.
The distribution of the peak-to-average power ratio (PAPR) for Geometric method [1] of PAPR reduction in orthogonal frequency-division multiplexing (OFDM) signals is evaluated in order to analyse the influence of the carrier frequency of adding signal on the PAPR reduction. Assuming that the baseband OFDM signal is characterized as a band-limi(...)
Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Asymptotic Distribution