Cameroon Journal of Experimental Biology最新文献

{"title":"Evaluation of metabolic syndrome in undergraduate students at the University of Dschang","authors":"Dabou Solange, T. P. Bruno, Sama Leonard Fonkeng","doi":"10.4314/cajeb.v11i1.7","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.7","url":null,"abstract":"Metabolic syndrome (MetS) is a cluster of risk factors for cardiovascular diseases (CVD), such as obesity, dyslipidemia, high blood pressure, and high blood glucose; it increases morbidity and mortality of CVD. MetS affects both adults and youths, leading to an impaired quality of life and a lowering of life expectancy. This study aimed to assess various aspects of metabolic syndrome, in undergraduate students at the University of Dschang. A questionnaire was distributed to 307 students of both sex; 203 meeting inclusion criteria were selected for anthropometric and blood pressure measurements followed by blood sample collection, for the dosage of biochemical markers (blood glucose, total cholesterol, LDL cholesterol, HDL cholesterol, triglyceridemia, and C-reactive protein). Results indicate that the prevalence of metabolic syndrome within the study population was 11.33 %. It has a significant predominance among obese and overweight patients (P˂0.05), compared to normal ones. Elevated blood pressure (OR= 23.4) and low HDL cholesterol levels (OR= 20.4) appeared to be the most determinant components of metabolic syndrome in the study population. We found an increase of metabolic syndrome prevalence with frequent consumption (3 to 4 times per week) of ‘‘Koki’’ (P=0.023), ‘‘Achu’’ (P=0.01), ‘’Corn couscous’’ (P=0.012), Salads (P=0.031), ‘‘Ndole’’ (P=0.039) and pork (P=0.04). On the contrary, the prevalence of metabolic syndrome decreases significantly, with frequent consumption of green vegetables (P=0.016). Metabolic syndrome is present in undergraduate students of the University of Dschang, as a consequence of excess fat storage. Its main features are elevated blood pressure and low HDL-cholesterol level.Keywords: Obesity; Metabolic syndrome; cardiovascular risk factor; students; University of Dschang","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"11949 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82246587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibacterial and antioxidant activities of extracts and some flavonoids from the leaves of Clerodendrum buchholzii Gurke (Verbenaceae)","authors":"F. D. Mabou, J. Tamokou, D. Ngnokam, L. Voutquenne-Nazabadioko","doi":"10.4314/cajeb.v11i1.5","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.5","url":null,"abstract":"Morbidity and mortality due to diarrhoea continues to be a major problem in many developing countries. The most common microorganisms responsible for diarrhoeal diseases are Vibrio cholerae , Escherichia coli and Shigella spp. The present study aims to evaluate the antibacterial and antioxidant activities of extracts and compounds from the leaves of Clerodendrum buchholzii , a plant traditionally used in the African pharmacopeia for the treatment of furunculosis, echymosis and gastritis. The dried leaves were macerated in methanol (MeOH) to afford the crude extract that was extracted with ethyl acetate (EtOAc) and n -butanol ( n -BuOH) to obtain EtOAc and n -BuOH extracts, respectively. The column chromatography of EtOAc and n -BuOH extracts followed by purification of different fractions led to the isolation of four known flavonoids [acacetin 7-O-β-D-glucoside ( 1 ), kaempferol 7-O-β-D-glucoside ( 2 ), acacetin ( 3 ) and apigenin ( 4 )]. Structures of isolated compounds were assigned on the basis of spectroscopic analysis, and by comparison of our data with those of the literature. The antioxidant activity was evaluated using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) and gallic acid equivalent antioxidant capacity (GEAC) assays. The antibacterial activity was assessed using broth microdilution method by performing minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC) against the strains of Gram-positive bacterium, Staphylococcus aureus (a major cause of community and hospital-associated infection), and Gram-negative multi-drug resistant bacteria, Vibrio cholerae (causative agent of cholera) and Shigella flexneri (causative agent of shigellosis). All of the extracts showed different degrees of antioxidant and antibacterial activities. Apigenin ( 4 ) obtained from EtOAc extract displayed the largest antibacterial and antioxidant properties which were in some cases equal or higher than those of reference drugs. Our results showed that C. buchholzii has potentials as a natural source of anti-diarrhoeal and free radical scavenging products, and could be given further investigations. Keywords: Clerodendrum buchhlzii , Verbenaceae, Flavonoids, Antibacterial, Antioxidant","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90693019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytodiversité et stock de carbone dans les agroforêts de l’écotone du Mbam et Inoubou au Cameroun","authors":"Alex Bruno Etchike Dong, P. Mapongmetsem, M. Ngassoum","doi":"10.4314/cajeb.v11i1.2","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.2","url":null,"abstract":"Systeme de production traditionnel, les agroforets rythment particulierement les paysages ruraux de l’ecotone du Mbam et Inoubou dans la region du Centre Cameroun. Malgre la plethore des travaux menes sur les agroforets du Centre et du Sud Cameroun, peu se sont vraiment interesses a sa contribution dans la lutte contre les changements climatiques. Ce travail a pour objectif de demontrer l’efficacite notable de ces agroforets dans la securite alimentaire des menages, la conservation de la biodiversite et dans l’attenuation du rechauffement climatique. Pour ce faire une analyse participative a ete realisee avec 56 exploitants repartis dans cinq villages. Des inventaires botaniques ont ete realises dans chacune de ces 56 agroforets. Les donnees recueillies ont fait l’objet d’analyses diverses (calcul des indices ecologiques, de diversite et la biomasse, tests statistiques). Les cultures les plus frequentes dans ces agroforets sont le mais avec l’espece Zea mays (89 %), le haricot (78 %) qui regroupe les especes Phaseolus vulgaris et Glycine max. La cacaoculture est la plus repandue des cultures de rente. L’inventaire ressort 21 especes fruitieres reparties dans 16 genres et 16 familles, 41 especes locales reparties en 37 genres et 21 familles. La richesse specifique des fruitiers est globalement evaluee a 21 especes contre une richesse specifique d’especes locales de 41 especes. Le palmier a huile (Elaeis guineensis) vient en premier rang de ces fruitiers avec 27,07% suivie de Dacryodes edulis (15,63%). Terminalia glaucescens vient au premier rang des especes locales avec un index de valeur importante (IVI) global de 150,63 suivie de Piliostigma thonningii (115,79) et de Ficus spp (112,03). Mangifera indica (829,5 t), Dacryodes edulis (438,2 t) et Ficus exasperata (239,5 t) sont les especes qui stockent le plus de carbone dans ces agroforets, ce qui temoigne de l’efficacite de ces agroforets dans la valorisation et la conservation de la phytodiversite et dans l’attenuation du rechauffement climatique pouvant etre pris en compte dans l’avancee des politiques du mecanisme REDD+.Mots cles: Agroforets, Centre Cameroun, phytodiversite, Indice ecologique, stock de carbone, attenuation, REDD+English AbstractTraditional production system, agroforests particularly characterizes rural landscapes of the Mbam and Inoubou ecotone in the Central region of Cameroon. Despite the plethora of works carried out in the Central and south Cameroon agroforests, few authors were really interested in their contribution on the fight against climate change. This work is designed to demonstrate significant efficiency of these agroforests in the food security of households, the conservation of biodiversity and mitigation of global warming. To do this, a participatory analysis was conducted with 56 exploiters across five villages. Botanical inventories were carried out in each of the 56 agroforests. The data collected were submitted to various analyses (calculation of ecological","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86523743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytoconstituents and preliminary antiradical property evaluation of Baillonella toxisperma (Sapotaceae)","authors":"Kevine J.J. Dongmo, R. T. Fouedjou, B. T. Tchegnitegni, B. Ponou, R. Teponno, K. Siems, M. Melzig, L. Tapondjou","doi":"10.4314/cajeb.v11i1.8","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.8","url":null,"abstract":"From the EtOAc fraction of the methanol extract of the stem barks of Baillonella toxisperma (Sapotaceae), eight compounds were isolated using column chromatography techniques. Their structures were established on the basis of 1D and 2D-NMR data and comparison with data published in the literature. The MeOH extract, n-BuOH and EtOAc fractions together with some pure compounds (4, 5, 7, 8) were screened for their radical scavenging activity using the2,2-diphenyl-1- picryl-hydrazyl-hydrate (DPPH) free radical in order to get preliminary information about the antiradical capacities of this plant.Keywords: Baillonella toxisperma;Sapotaceae; DPPH; Antiradical activity","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88708779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence de la période de capture, du fumage et de la cuisson à ébullition sur le potentiel nutritionnel d’Oreochromis niloticus du fleuve Nkam (Yabassi-Cameroun)","authors":"Justin Djopnang Djimbie, J. M. Njinkoue, H. Womeni, Inocent Gouado, M. T. Eyango, Christelle Tiwo Tsapla, F. T. Djikeng, Sabine Nga Ombede, Huguette Djeuachi Tchutcheu, Iruku Naga Satya Surya Prabhaka, M. S. L. Karuna, R. B. N. Prasad, Steve Kemmo Signing, Elvis Nganou Fabo, F. Tchoumbougnang","doi":"10.4314/cajeb.v11i1.4","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.4","url":null,"abstract":"Pour contribuer a la valorisation des bios ressources aquatiques du Cameroun, le potentiel nutritionnel d’Oreochromis niloticus du fleuve Nkam a Yabassi a ete determine. L’objectif etait d’evaluer dans leur partie comestible (chair+peau), la composition bromatologique en fonction des grandes periodes de capture (novembre, mars et juillet), d’analyser l’influence du fumage et de la cuisson a ebullition sur leur composition proximale et le profil des acides gras. Les methodes conventionnelles ont ete utilisees. Les donnees obtenues ont varie significativement (P<0,05) en fonction du traitement. Dans la periode de capture, les proteines (47,85 %MS) et cendres (19,80 %MS) ont ete plus elevees en mars et plus faibles en juillet (32,67 et 7,20 %MS respectivement). Le fumage et l’ebullition ont concentre la matiere seche et les cendres, mais ont diminue les proteines (de 47,85 a 35,58 et 40,44 %MS respectivement), les lipides (de 23,34 a 19,91 et 16,90 %MS respectivement) et l’energie (de 437,50 a 357,91 et 397,30 kcal/100gMS respectivement). Sur les mineraux, le fumage et l’ebullition ont favorise l’augmentation du potassium (de 4659,29 a 8736,17 et 6988,93 mg/kg respectivement) et magnesium (18,72 a 34,14 et 37,84 mg/kg respectivement). Leurs lipides ont ete riches en acide palmitique (26,50-26,79%) et l’acide oleique (14,52-17,72 %). Toutefois, les acides gras essentiels omegas-6 (l’acide linoleique (4,93-9,07 %), arachidonique (3,12-3,73 %)) et omegas-3 (l’acide α-linolenique (4,17-6,27 %), docosahexaenoique (1,72-2,84 %)) ont ete bien representes. Le rapport omegas-3 sur omegas-6 a augmente en passant de 0,71 a 0,91 et de 0,71 a 1,20 pour le fumage et l’ebullition respectivement. Par contre, le rapport acides gras polyinsatures sur acides gras satures a diminue de 0,60 a 0,42 avec le fumage et augmente de 0,60 a 0,71 avec l’ebullition. Les differents effets observes ont ete plus severe avec le fumage que l’ebullition. Ces donnees pourront servir a completer les tables de composition des aliments locaux, necessaires pour les formulations alimentaires.Mots cles: Yabassi, Fleuve Nkam, Oreochromis niloticus, valeur nutritionnelle, fumage, ebullitionEnglish AbstractIn order to contribute to the valorization of the bio-aquatic resources of Cameroon, a study on the nutritional value of Oreochromis niloticusfrom river Nkam at Yabassi was carried out. The aim was to evaluate on their edible parts (flesh + skin), the chemical composition with respect to the main periods of captures (November, March and July), evaluate the influence of smoking and boiling on their proximate composition as well as their fatty acids profile, by conventional methods. The data obtained varied significantly (P<0.05) according to the treatments. During the capture period, Proteins (47.85 %dm) and ashes (19.80 %dm) were higher in March and lower in July (32.67 and 7.20 %dm respectively). Smoking and boiling concentrated the dry matter and ashes, but reduced proteins (from 47.85 to 3","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77783215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lannea acida improves the emission phase of ejaculation of mature male rat: effects on vas deferens and seminal vesicles","authors":"P. Watcho, Aimé Césaire Momo Tetsatsi, M. Wankeu-Nya, Georges Roméo Bonsou Fozin, François Xavier Kemka Nguimatio, Pepin Alango Nkeng-Effouet, T. B. Nguelefack, A. Kamanyi","doi":"10.4314/cajeb.v11i1.6","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.6","url":null,"abstract":"Objective: The barks of Lannea acida (L. acida) are used in traditional medicine as aphrodisiac. This work was undertaken to evaluate the effects of L. acida on vas deferens contractility (in vitro test) and seminal vesicles pressure (ex-copula test) of mature rat.Methods: For the in vitro test, rats were sacrificed by cervical dislocation and the vas deferens removed and mounted in an isolated organ bath containing aerated physiological Krebs solution for the recording of the effects of aqueous extract of L. acida (0.91-14.54 mg/ml) and KCl (13.25-106 mg/ml). For the ex-copula test, the seminal vesicles pressure of urethane-anesthetized rats was measured after urethral and tactile stimulations, intravenous administration of NaCl 0.9% (1 ml/kg), dopamine (5 mg/kg) or plant extract (5-40 mg/kg).Results: Similar to KCl (13.25-106 mg/ml), the aqueous extract of L. acida concentration-dependently contracted the vas deferens. Furthermore, urethral and tactile stimulations as well as intravenous administration of dopamine or plant extract induced contractions of the seminal vesicles characterized by an increase of the pressure. This increase induced by the plant extract was dose-dependent with significant effects obtained at doses 20 mg/kg, 30 mg/kg and 40 mg/kg.Conclusion: These results show that L. acida improves the emissive phase of ejaculation through contraction of vas deferens and seminal vesicle smooth muscles.Keywords: Lannea acida, emission phase of ejaculation, vas deferens, seminal vesicles, rat","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91373371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ethnobotanical study on Wetland macrophytes of medicinal importance in the Western Highlands of Cameroon","authors":"T. Fonkou, Benoît Nguelefack Télesphore, Boyah Kajoh Julius, V. Nguetsop, Martin Lekeufack, Elsie Sandra Tongueu Motue, Manuella Kelly Djeuga Youga, Marcelle Franca Meguem Mboujda","doi":"10.4314/cajeb.v11i1.3","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.3","url":null,"abstract":"The objective of the study was to make a survey of wetland medicinal plants in the Western Highlands of Cameroon. Eighteen (18) wetlands in four divisions namely Penka-Michel (Menoua division), Batcham (Bamboutos division), Bassap- Bafang (Haut-Nkam division) and Foumban (Noun division) were visited between the months of May and August 2015. Semi-structured interviews were conducted among 38 traditional practitioners and herbalists. Eighteen transects of 1 m × 10 m (10 m²) were established to study the phytosociology of wetland medicinal macrophytes with other associated plants. In each transect, 10 quadrats of 1 m x 1 m were traced in which all plant species including medicinal plants were inventored and counted. A total of 82 wetland macrophytes of medicinal importance grouped into 64 genera and 40 families were documented to treat over 74 different ailments. The most frequent family was the Asteraceae with the highest number of genera (7) followed by Fabaceae and Poaceae with 4 genera each. The most cited plant species were Emilia coccinea (Sims) G. Don, Commelina benghalensis L. and Coccinia barteri (Hook.f.) Keay. Emilia coccinea (Sims) G. Don alone is used for treating 14 ailments while Commelina benghalensis L. and Coccinia barteri (Hook.f.) Keay were used to treat 5 and 4 ailments respectively. The most regularly used plant part was the leaves (55.75 %) followed by whole or entire plant (24.54 %) for treating several diseases such as palpitation, skin diseases, digestive problems, dysentary, influenza, infertility, boil, sore throat, sexual impotence and kidney problems among others. The wetlands in the Western Highlands of Cameroon are rich in medicinal macrophyte species which are used as food or food products for traditional health care. Keywords: Ethnobotany, wetlands, medicinal macrophytes, Infertility, Western Highlands of Cameroon","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74377573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performances comparées de survie et de croissance d’Oreochromis niloticus associé à Clarias jaensis et à Clarias gariepinus","authors":"P. Zango, Minette Tabi Eyango Tomedi, C. T. Tiogué, Thomas Ewoukem Efole, V. Pouomogne, Olivier Mikolaseck, J. Tchoumboue","doi":"10.4314/cajeb.v11i1.1","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.1","url":null,"abstract":"La prolificite tres eleve d’ Oreochromis niloticus en etang cause l’augmentation de densite, la reduction de croissance et du rendement(1). L’elevage mono-sexe male ou l’association de Clarias gariepinus a Oreochromis niloticus est souvent pratique pour controler cette prolificite. Cependant, le sexage manuel presente des erreurs et la production a l’aide des hormones ou du choc thermique sont couteux pour les pisciculteurs. Le caractere vorace de Clarias gariepinus est nefaste. L’utilisation d’autres Clariidae telle que Clarias jaensis , espece endogene au Cameroun constituerait une solution tout en valorisant la biodiversite aquacole. C’est ainsi que de mars 2013 a fevrier 2014 les performances de survie et de croissance de Oreochromis niloticus en monoculture, associe a Clarias jaensis et a Clarias gariepinus ont ete etudiees a la Ferme d’Application et de Recherche de l’Universite de Dschang (Latitude Nord : 5°24’ - 5°26’ et Longitude Est : 10°04’ - 10°07’), Ouest – Cameroun. A cet effet, 270 poissons dont 210 Oreochromis niloticus (17,52 ± 4,72g), 30 Clarias jaensis (16,85 ± 5,00g) et 30 Clarias gariepinus (15,66 ± 3,84g) ont ete utilises. Les poissons etaient stockes a 1,2 individus / m 2  et repartis en trois traitements a trois repetitions dont Oreochromis niloticus en monoculture, Oreochromis niloticus associe a Clarias jaensis et Oreochromis niloticus associe a Clarias gariepinus en etangs fertilises hebdomadairement aux fientes de poules. Au terme de l’essai, le taux de survie a ete significativement (p ≤0,05) plus eleve chez Oreochromis niloticus associe a Clarias gariepinus en pre grossissement (75%) et chez Oreochromis niloticus associe a Clarias jaensis en grossissement (90%) ,le gain moyen quotidien a ete plus eleve (au seuil de 95%) chez Oreochromis niloticus en monoculture et en association avec Clarias jaensis (0,31 ± 0,10g et 0,33 ± 0,15g/j). Le nombre d’alevins d’ Oreochromis niloticus produits a ete significativement (P ≤ 0,05) plus faible dans l’association avec Clarias gariepinus . Ainsi, les performances de croissance et le rendement d’ Oreochromis niloticus associe a Clarias jaensis ont ete meilleurs qu’en monoculture. Clarias jaensis est un candidat potentiel pour l’amelioration de la production du Tilapia en contribuant a la diversification des especes de Silure en elevage au Cameroun. Mots cles: Oreochromis niloticus , Clarias jaensis , Clarias gariepinus , monoculture, association, Performances de croissance English Abstract In the fish farms of Cameroon in general, Clarias gariepinus is associated with Oreochromis niloticus in order to control the undesired prolificacy and increase growth a final yield. However, the voracious tendency of Clarias gariepinus with large prey sometimes leads to a decrease of the yield. The use of the less voracious species such as Clarias jaensis could be the way for preservation of endogenous fish species. Thus, the effect of types of catfish association in survival rate and growth per","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75211019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evidence-based in vivo tocolytic activities of Alchornea laxiflora (Benth) (Euphorbiaceae) in female rats","authors":"P. Watcho, Vanessa Wandja, E. Ngadjui, Patrick Brice Deeh Defo, M. Wankeu-Nya, T. B. Nguelefack, A. Kamanyi, P. Kamtchouing","doi":"10.4314/cajeb.v11i1.9","DOIUrl":"https://doi.org/10.4314/cajeb.v11i1.9","url":null,"abstract":"","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"94 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81612296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Desiccation Tolerance, Germination and Moisture Sorption Isotherm of Garcinia afzelii seeds","authors":"J. M. Asomaning, M. Sacande","doi":"10.4314/CAJEB.V10I1.2","DOIUrl":"https://doi.org/10.4314/CAJEB.V10I1.2","url":null,"abstract":"The desiccation tolerance of Garcinia afzelii seeds was determined and  sensitive vigour tests for assessing seed deterioration of this species were identified. Matured fruits were harvested in March 2009 from a small  plantation at Ho in the Volta Region of Ghana. Depulped seeds were mixed with moistened sawdust and placed in white cotton sacks and quickly  transported by air to the Seed Conversation Department of the Royal  Botanic Gardens in the United Kingdom where a part of the experiment was carried out. The second season’s seeds was also harvested from the same plantation in April 2010 and used for another part of the studies in Ghana. Seed equilibrium relative humidity and moisture content on receipt in the United Kingdom were 93.3 % and 38.2 % respectively. Seed germination percentage decreased gradually with reduction in seed moisture content until after 25 % moisture content when germination percentage reduced drastically to 43 % at 23 % moisture content. The seeds of Garcinia afzelii are recalcitrant, with ‘critical moisture content’ about 25 %. Seedling dry weight, seed vigour index and speed of germination also decreased as seeds were dried. Electrical conductivity of leachate from seeds increased with desiccation of seeds. Water sorption isotherm curve for the species showed the typical sigmoid shape curve similar to that of orthodox species. Key words: Garcinia afzelii, vigour index, seedling dry weight, electrical conductivity, critical moisture content, moisture sorption isotherm.","PeriodicalId":9401,"journal":{"name":"Cameroon Journal of Experimental Biology","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87227064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}