ProGRES

ARTICLE

Numerical study of natural convection drying of coffee grains contained in a vertical channel with constant heat flux on walls

D. BATHIEBO

We present a numerical study of the drying by natural convection of coffee grains contained between two vertical walls subjected to a uniform heat flux. The coffee grains bed is assumed to be in a porous medium, heat and mass transfers which are described by the classical natural convection equations and the Darcy-Brinkman momentum equation. T(...)

Mots clés non renseignés

ARTICLE

Bosea minatitlanensis sp. nov., a strictly aerobic bacterium isolated from an anaerobic digester

Aboubakar S. Ouattara, Essokazi A. Assih, Sebastien Thierry, Jean-Luc Cayol, Marc Labat, Oscar Monroy and Herve´ Macarie

A strictly aerobic, mesophilic bacterium, strain AMX 51T, was isolated from anaerobic digester sludge. Cells were Gram-negative, motile, non-sporulating, straight to curved rods with one polar flagellum. The isolate had phenotypic traits of the genus Bosea, including cellular fatty acid and substrate utilization profiles. Physiological charact(...)

Bosea minatitlanensis sp. nov., strictly aerobic bacterium, anaerobic digester, cellular fatty acids, Mexico

ARTICLE

Electrochemical synthesis of [1, 2, 4] oxadiazol-3-one derivatives: anodic oxidation of N-amidoimidates

I. TAPSOBA

Anodic oxidation of N-amidoimidates was performed in acetonitrile+ lithium perchlorate as the electrolyte solution at platinum using controlled potentials. The products, isolated in good yield after oxidation of the amide group followed by deprotonation and intramolecular cyclization reactions, were identified as [1, 2, 4] oxadiazol-3-one deri(...)

Mots clés non renseignés

ARTICLE

Préparation et caractérisation par Rayons X, par spectrométries UV- visible, IR, Mössbauer et RPE de composés thiolates de la phtalocyanine de fer

M. BAYO-BANGOURA, K. BAYO, G. V. OUEDRAOGO, J. C. MOSSAYAN, G. TERZIAN, D. BENLIAN.

Iron(II) phthalocyanine complexes with SR (R = CH3, CH2C6H5, C6H5, C6H4-pNO2) have been prepared in solid form. These complexes have been characterised by X-Ray diffraction, infrared, electronic, Mössbauer and EPR spectrometries. The X-Ray diffraction of powder spectre show the characteristic lines of Fe-S entity. In infrared spectre, the com(...)

Iron(II) phthalocyanine, thiolates complexes, characterisation

ARTICLE

"The Folktale Archetype in Ama Aidoo’s No Sweetness Here and Other Stories"

KIEMA, Alfred

En utilisant la structure du conte selon le modèle de Vladimir Propp. , Ama Ata Aidoo allie oralité et écriture pour traiter des thématiques contemporaines dans un monde contemporain et ce faisant créer une esthétique de la nouvelle originale

Folktale, , narrative, , plot, , orality, , archetype

ARTICLE

Preparation and analysis by UV-Vis of zinc phthalocyanine complexes

K. Bayo, J.C. Mossoyan , G.V. Ouedraogo

We have prepared and isolated a series of zinc phthalocyanine complexes (ZnPc, ZnPcF8, biZnPc, F12biZnPc). These compounds have been analyzed by electronic spectrometry. The analysis of results demonstrates that the importance of intramolecular interactions in the binuclear species depends on the nature of the peripheral substituents. Keywo(...)

Keywords: Zinc; Phthalocyanine; Binuclear complexes; UV-Vis

ARTICLE

Spectres IR de monophtalocyanines et de biphtalocyanines de zinc et de cobalt et de leurs dérivés halogénés.

K. BAYO , G. V. OUEDRAOGO, K. BENIHYA, G. TERZIAN, J.C. MOSSOYAN

Nous avons préparé et étudié une série de complexes de la phtalocyanine par spectrométrie d'absorption infra-rouge. Les composés étudiés sont: MPc, biMPc, MPc(X)8, MPc(X)16, (X)12biMPc et biH2Pc avec M = Zn ou Co et X = F, Cl ou CN. Du fait du haut degré de symétrie de la molécule de la phtalocyanine et des analogies de structure entre mo(...)

Phthalocyanine; biphthalocyanine; zinc; cobalt; infrared spectra

ARTICLE

Plasma chitotriosidase activity in acute Plasmodium falciparum malaria

K. SIMPORE

Background: Chitotriosidase is a functional chitinase secreted by activated macrophages. It is encoded by a gene located on chromosome 1q31-32, whose mutations may be responsible for chitotriosidase deficiency, encountered in almost 6% of Caucasian population. Objective: This study reports firstly plasma chitotriosidase activity in African chi(...)

Mots clés non renseignés

ARTICLE

A New Route of Synthesis of 3a, 6a-Dihydro-oxazolo [5, 4-d] oxazole Derivatives

I. TAPSOBA

The electrochemical reduction of N-acylated imidates of a typical structure has been investigated by cyclic voltammetry and controlled potential electrolysis at mercury electrode in aprotic solvent. Electrodimerization occurs at the first wave and leads to the formation of 3a, 6a-dihydro-oxazolo [5, 4-d] oxazole 2 in good yields. Scheme 1.

Mots clés non renseignés

ARTICLE

Zymography of Monophenolase and o-Diphenolase Activities of Polyphenol Oxidase

DICKO Mamoudou. H., HILHORST, R., GRUPPEN, H., LAANE, C., van BERKEL, W. J. H. and VORAGEN, A. G. J

A new procedure for the zymography of monophenolase and o-diphenolase activities of polyphenol oxidase (PPO), and peroxidase (POX) is proposed using a highly sensitive, chromogenic nucleophile 3-methyl-2-benzothiazolinone hydrazone (MBTH), which traps quinones. The procedure allowed the distinction between PPO isoenzymes from sorghum and mushr(...)

polyphenol oxidase, peroxidase, zymography, activity staining, isoenzymes, mushroom

ARTICLE

Comparison of the content of phenolic compounds, polyphenol oxidase and peroxidase in grains of fifty sorghum varieties

140. DICKO Mamoudou. H., HILHORST, R., GRUPPEN, H., TRAORE, A. S., LAANE, C., van BERKEL, W. J. H. and VORAGEN, A. G. J.

Analysis of fifty sorghum [Sorghum bicolor (L.) Moench] varieties used in Burkina Faso showed that they have different contents of phenolic compounds, peroxidase (POX), and polyphenol oxidase (PPO). Most of the varieties (82%) had a tannin content less than 0.25% (w/w). POX specific activity was higher than the monophenolase and o-diphenolase(...)

Phenolic compounds, ,tannins, ,polyphenol oxidase, ,peroxidase

ARTICLE

IR and UV-Visible spectra of iron (II) phthalocyanine complexes with phosphine or phosphite

A. Zanguina, M. Bayo - Bangoura, K. Bayo, G.V. Ouédraogo.

We have prepared and studied by vibrational and electronic spectrometry of a series of ferrophthalocyanine complexes with phosphine or phosphite axial ligands [PMe3, P(OMe)3, PPh3, P(OPh)3, PPh(OMe)3 and POH(OEt)2]. With PMe3, P(OMe)3 as ligands, only hexacoordinated complexes are obtained but with PPh3, P(OPh)3 and POH(OEt)2 as ligands, the(...)

Iron(II) phthalocyanine complexes, Phosphine, Phosphite, Vibrational spectrometry of ferrophthalocyanine complexes

ARTICLE

Super-représentations faibles de superalgèbres de Malcev

Akry Koulibaly, Marie Françoise Ouedraogo

Cet article donne des propriétés de superalgèbres de Malcev sur un corps de caractéristique zéro. Nous généralisons le concept de représentation d'algèbres de Malcev aux superalgèbres de Malcev. Soit K un corps de caractéristique zéro. On sait qu'une superalgèbre est dite de Malcev si son enveloppe grassmannienne est une algèbre de Malcev. Co(...)

Algèbre de Malcev, superalgèbre de Malcev, superalgèbre triple de Lie, super-représentation de Malcev

ARTICLE

Supersystèmes triples de Lie associés aux superalgèbres de Malcev

Akry Koulibaly, Marie Françoise Ouedraogo

Dans cet article. Nous définissons les notions de superalgèbres triples de Lie et de super-systèmes triples de Lie. Nous montrons qu'une superalgèbre de Malcev peut être munie d'une structure de superalgèbre triple de Lie et aussi d'une structure de supersystème triple de Lie. Nous prolongeons la notion de super-représentation faible aux su(...)

superalgèbre de Malcev, super-représentation de Malcev

ARTICLE

COMPOSITION CHIMIQUE ET ACTlVITES ANTIBACTERIENNES DES HUILES ESSENTIELLES DES FEUILLES ET DES FLEURS DE CYMBOPOGON PROXIMUS (STAPF.) ET D'OCIMUM CANUM (SIMS)

BASSOLE, I. H. N. ,OUATTARA A. S. ,NEBIE R ., OUATTARA, C. A. T ., KABORE, Z ., TRAORE, S.A

The chemical composition of the essential oils of Cymbopogon proximus and Ocimum canum obtained from the air-dried leaves and jlowers were analysed using GC and GC-MS Cymbopogon proximus leaves belonged to piperitone chemotype and Ocimum canum leaves andflowers belonged to 1,8-cineole (61,2 %) and le cis + trans piperitol (68,(...)

Cymbopogon proximus, Ocimum canum, Poaceae, Lamiaceae, essential oil, antibacterial activity

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