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Search Results: 1 - 10 of 200963 matches for " N’GUESSAN Francis "
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Parasitic load of wastewater of the gouro collector crossing the municipalities of Abobo, Adjamé and Cocody (District of Abidjan)
Technologies de Laboratoire , 2011,
Abstract: Domestic sewage is an usual vehicle for human pathogens including parasitic helminth eggs. Our aim is the parasitological characterisation of the wastewater of the gouro collector of Abidjan city in C te d'Ivoire. The Bailenger's method for detection and quantification helminths eggs was used to process samples four sampling sites of the collector during five months. We observed ten taxa that are member of the nematod, cestod and trematod classes. A taxonomic variability was observed from a sampling site to another. During The local rainy season an increase of the parasitic load was noted.
Hepatic and Glucose Biotolerance Induced by the Aqueous Extract of Leaf of Parkia biglobosa in Rabbit
Yapo Adou Francis,Edjeme-Ake N'guessan Angele,Yeo Dodehe,Yapi Houphouet Felix
Journal of Asian Scientific Research , 2012,
Abstract: The aqueous extract of leaves of Parkia biglobosa (Pb) is used in Africa to cure hypertension or for the treatment of immunocompromised individuals. To avoid intoxication of consumers, our study was carried out to evaluate the action of the extract on the level of glucose and liver enzymes [Akaline phosphatase (ALP), Aspartate aminotransferase (AST) and Alanine aminotransferase (ALT)]. Two sets of five (5) batches of six (6) rabbits were constituted. The first set each received a single dose of Pb (25, 50, 75 and 100mg/kg body weight or BW) and 0.9% NaCl. The second set were given Methylprednisolone 15mg/kg BW (MP15) and mixtures MP15 and Pb (25, 50, 75 and 100 mg/kg of BW). Rabbit whole blood were collected in dry tubes from the marginal ear vein on the first day before injection (Do), then the 3rd, 9th, 15th and 21th days, was centrifuged. The serum obtained was used for assay of glucose, transaminases and ALP on automate Cobas Integra 400 Plus . The doses of Pb 25, 50, 75mg/kg of BW did not induce significant changes in transaminases (ALT and AST), ALP and glucose compared to control group (0.9% NaCl) from D0 to D21. However, the dose of 100 mg/kg produced significant increase in transaminases and glucose (p<0.05) levels. The doses of aqueous leaf extract of Parkia biglobosaused were tolerated by the liver and did not involve an hyperglycaemia.
Influence of Post-Harvest Storage Technologies on Weight and Rate Losses and Sensory Profile of Cola Nuts (Cola nitida) Produced in C?te d’Ivoire  [PDF]
Jean-Marc NGuessan, Elisée Yapi Kouakoua, Nestor Kouakou Kouassi, Georges NGuessan Amani
Open Journal of Applied Sciences (OJAppS) , 2018, DOI: 10.4236/ojapps.2018.89028
Abstract: The conservation of cola nuts (Cola nitida) poses a real problem in Côte dIvoire because of the post-harvest losses. The objective of this study was to evaluate the impact of post-harvest technologies on organoleptic and physical properties of cola nut during storage. A biopesticide, glucose syrup and biopesticide + glucose syrup were applied to fresh cola nuts before conditioning and kept at 28°;C for 6 weeks. Physicochemical and sensory analyses were performed to check the quality of the nuts during storage. The results showed that the biopesticide keep cola nuts better than the others methods with only 11.66% ± 3.04% and 13.66% ± 3.95% of loss rates for white and red cola nuts respectively. Cola nuts treated with bio-pesticide retain significantly their freshness with 62.00% ± 1.15% of moisture for white nuts and 64.00% ± 2.00% of moisture for red nuts compared to those treated with glucose syrup and bio-pesticide + glucose syrup (56.66% ± 1.15%). Cola nuts treated with biopesticide have a better acceptability compared to those subjected to others treatments. The use of biopesticide for the storage of cola nuts minimizes the losses and maintains the quality whatever the type of cola.
Antioxidant and Cytotoxicity Potential of Six Synthesized Chalcones  [PDF]
S. L. Kouakou, M. Ouattara, J. P. NGuessan, S. Coulibaly, A. G. Irié-NGuessan, G. Kouakou-Siransy
Pharmacology & Pharmacy (PP) , 2018, DOI: 10.4236/pp.2018.912042
Background: Chalcones are open-chain flavonoids which display a large number of pharmacological activities such as cytotoxic, anti-inflammatory including antioxidant. The objective of this study was to assess antioxidant and cytotoxic activity of six synthesized chalcones. Methodology: For the current experiments, 1,3-diphenylpropenone (compound R) was used as molecular model to synthetize six compounds, namely three
benzyl-benzimidazolyl-chalcones (U1, U2, WAC1) and three imidazopyridinyl-chalcones (V1, V2, V3). All the compounds were evaluated for their ability to scavenge the stable free ABTS.+ radical cation, according to the method develop by Choong et al. In addition, the cytotoxicity test described by Price et al., was performed using healthy human cell line, then in human malignant cell lines (HEP-2, A549). Results: All synthesized chalcones reduced the ABTS.+ radical cation. Indeed, benzyl benzimidazolyl compounds WAC1, U1, U2, by developing respectively 39.61%, 66.09%, and 84.20% percentages of
Diversité botanique dans le sud du parc national de Ta , C te d’Ivoirean
CYA Yao, EK NGuessan
Afrique Science: Revue Internationale des Sciences et Technologie , 2005,
Abstract: Botanical diversity of the South of Ta National Park, C te d’Ivoire The Tai National Park (TNP) is one of the last vestiges of primary forest remained in West Africa. The northern part is almost well known but the southern one is not. To mitigate this lack, we conducted a study in the South of the TNP. To achieve the inventory, two methods were used: “walk set up” and the “plot set up”. Nine hundred height plants species were recorded. They belonged to 550 genera and 116 families. The richest families were Rubiaceae, Euphorbiaceae and Caesalpiniaceae. Among all the species, 175 were endemic of West African forests, 11 endemic to Ivorian forests and 61 “sassandrian”. The study showed that for tree species with dbh ≥10 cm Hymenostegia afzelii, Strombosia pustulata, Diospyros sanza-minika, Funtumia africana, Calpocalyx brevibracteatus and representatives of Caesalpiniaceae, Euphorbiaceae and Ebenaceae families were the richest and had the highest values of IVI and FIV. Endemic, “sassandrian”, rare and threatened species constitute the major characteristic of the TNP and confirm that it includes in the Guinean Forests of West Africa Hotspot.
L'urbanisation africaine sous les reflets du mirage de la mondialisation
Kouakou N'guessan Fran ois
African Anthropologist , 2000,
Abstract: Reflection on "African urbanisation in the light of the mirage of globalization" focuses on the following main preoccupations: Characteristics of African urbanisation in the context of globalization; Response of social and cultural anthropology; and Perspectives offered to research and research-action? This paper raises questions about the processes of urbanisation in Africa and its developmental corollaries within world-wide ideology. It finally focuses on anthropological perspectives of a true "africanisation" of urban space within the global perspective. JOURNAL OF THE PAN AFRICAN ANTHROPOLOGICAL ASSOCIATION Number 2 Volume VII September 2000, pp. 174-181
Influence of Traditional Inoculum and Fermentation Time on the Organoleptic Quality of "Attiéké”  [PDF]
Nimaga Daouda, Tetchi Fabrice Achille, Kakou Cela Abodjo, Nindjin Charlemagne, Amani Nguessan Georges
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.310176
Abstract: To improve the process of “Attiéké” production by the standardization of the traditional inoculums, the effects of inoculums amount (6%, 8%, 10% and 12%) and fermentation time (6, 12 and 18 h) were studied and analyzed for their microbiological and sensory qualities using standard analytical procedures. The microbial analysis showed that Lactobacillus species (9.14 Log cfu/g) as the most important popular microorganism in the paste, followed by enterococci (7.64 Log ufc/g) species, yeasts and moulds (7.30 Log cfu/g) respectively. Sensory analysis revealed significant effects (p < 0.05), of inoculums quantity and fermentation time on the “Attiéké” quality. “Attiéké” obtained with 10% inoculums and after 12 hours of fermentation was identified as the optical inoculums amount and time for “Attiéké” production. The importance of traditional starter inoculums in “Attiéké” processing could be necessary to standardization at small and industrial scale the process of production.
Stratégie de reproduction du carangidae Trachinotus teraia cuvier, 1832 dans la lagune ebrié (C te d’Ivoire)
S Sylla, B Atse, JK N'Guessan
Sciences & Nature , 2009,
Abstract: La reproduction de Trachinotus teraia a été étudiée dans la lagune Ebrié au cours de campagnes mensuelles pendant deux années consécutives (février 2004 à janvier 2006). Cette étude se situe dans le cadre d’acquisition de connaissances sur la biologie de Trachinotus teraia en vue d’évaluer son potentiel aquacole. Au total, 1806 spécimens dont 739 males, 746 femelles et 321 juvéniles ont été capturés à l’aide de filets maillants (mailles : 10, 14, 20, 25, 30, 35, 40, 50, 80 et 100 mm) et examinés. En ce qui concerne les paramètres déterminés, le sex-ratio est 1 : 1. La taille de première maturité sexuelle (LF50) est atteinte à 199 mm et 212 mm respectivement chez les males et les femelles. Le plus petit individu male mature capturé mesure 154 mm (LF) et pèse 86,85 g tandis que la plus petite femelle mature capturée mesure 170 mm (LF) et pèse 118,24 g. Les variations mensuelles des indices gonadosomatique (IGS), hépato-somatique (IHS), du facteur de condition (K) et des stades de maturité indiquent deux périodes de reproduction. La longue période de ponte se situe de février à avril tandis que la courte période de ponte intervient de septembre à octobre. Les réserves hépatiques semblent être mobilisées pour assurer le co t énergique de la reproduction. La fécondité absolue varie entre 15 053 et 2 058 907 ovocytes pour des femelles de tailles comprise entre 260 et 582 mm. Les moyennes des diamètres ovocytaires de ces femelles sont de Reproductive biology of Trachinotus teraia was studied in the Ebrié lagoon during two years (from February 2004 to January 2006) by monthly sampling using gill nets with stretched mesh sizes 10, 14, 20, 25, 30, 35, 40, 50, 80, and 100 mm). Basic biological information was collected to describe some aspects of reproductive biology of T. teraia for use in aquaculture programmes. A total of 1806 specimens were examined (739 males, 746 females and 321 juveniles. The sex ratio was 1:1. The size at first sexual maturity (LF50) is reached at 199 mm and 212 mm respectively for the males and females. The smallest mature male was 154 mm (LF) and weighed 86.85 g while in female, this maturity occurred at 170 mm and 118.24 g. The monthly variations of the gonado-somatic index (GSI) and hepato-somatic index (HSI), the condition factor (K) and maturation stages indicated two periods of reproduction. The long period and the short period were respectively from February to April and from September to October. The hepatic reserves seem to be mobilized to ensure the energetic cost of the reproduction. The absolute fecundity was ranged from 15 053 to 2 058 907 oocytes for females of 260 and 582 mm (FL). The averages of the oocytes diameters ranged between 449.53 ± 152.49 μm and 393.29±126,85 μm, respectively for the large and the short periods of reproduction. Mots clés : Carangidae, Trachinotus teraia, reproduction, sex-ratio, fécondité, C te d’Ivoire.
Morphological Characteristics and Crystalline Structures of Granules of Some Wild Yam Species (Dioscorea) from Cote D`ivoire Forest Zone
Sahore Drogba Alexis,Amani n`Guessan Georges
Agricultural Journal , 2013,
Abstract: Starches extracted from tubers of (07) species of wild yam (Dioscorea) have been studied with regard to the morphology and to the crystalline structure of their granules. The results revealed shapes and variable starch granule sizes and characteritics for every starch. These starches are constitued of granules with triangular, ovo triangular, ellipsoidal and polyhedric shape. Globaly the distribution of the granule size varies from 0.8 to 90 m. It is for starch granules of every uniform and asymmetric specie. The starch of D. dumetorum that has some small granules ( = 3 m) has a crystalline structure of A type and the other studied starches that have some thick granules ( = 25 m) have a crystalline structure of B type.
Possibilités d’amélioration de la principale espèce cultivée de cotonnier (Gossypium hirsutum L.) pour la résistance au nématode réniforme (Rotylenchulus reniformis Linford et Oliveira)
NGuessan Olivier Konan,Guy Mergeai
Biotechnologie, Agronomie, Société et Environnement , 2007,
Abstract: Breeding possibilities of the main cultivated cotton species (Gossypium hirsutum L.) for the resistance to reniform nematode (Rotylenchulus reniformis Linford et Oliveira). The production of the main cultivated species of cotton, Gossypium hirsutum L., is seriously threatened by attacks of the reniform nematode Rotylenchulus reniformis Linford and Oliveira. This nematode reduces total yield from 15 to 75% according to the levels of infestation and the meteorological conditions. It is becoming one of the main threats of cotton production in America. This study reviews the possible control methods to limit the impact of this parasite and develops especially the prospects offered by the introgression of the resistance to the reniform nematode existing in the diploids species of the Gossypium genus.
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