Aphelenchoides nechaleos n. sp. and A. paranechaleos n. sp. (Nematoda : Aphelenchoididae) from rice plants

#Aphelenchoides nechaleos n. sp. et #A. paranechaleos n. sp. provenant à l'origine de tiges de riz de Sierra Leone et du Vietnam, respectivement, sont décrits et figurés. Leur aspect général et leur biologie sont très semblables à ceux de #A. besseyi$ Christie, 1942, mais les femelles des deux espèces nouvelles ne possèdent qu'un seul mucron caudal, simple, et un sac post-vulvaire plus long ; les spicules sont plus robustes et comportent une extrémité en crochet ; le mucron terminal de la queue du mâle est semblable à celui de la femelle. Ces deux nouvelles espèces sont presque identiques, ne se séparant que par la forme de la queue de la femelle et la courbure des spicules. L'une et l'autre espèces nagent vigoureusement dans l'eau, peuvent être facilement élevées et, dans une certaine limite, survivre à la dessication. (Résumé d'auteur

Use of isoelectric focusing and polyacrylamide gel electrophoresis of nonspecific esterase phenotypes for the identification of cyst nematodes Heterodera species

Les différences spécifiques dans les profils estérasiques de dix-neuf espèces d'#Heterodera d'origine géographique variée ont été observées à l'aide des techniques du point isoélectrique et de l'électrophorèse en gel natif. Vingt six bandes majeures d'activité estérasique ont été détectées. Quelques bandes sont communes à plusieurs espèces, alors que d'autres sont particulières à certaines espèces. #Heterodera elachista montre des phénotypes distincts et spécifiques. Les comparaisons entre les espèces d'#Heterodera$ ont été réalisées par l'analyse en grappe, à tous les niveaux, afin de préciser les coefficients de similarité. Les groupements révélés par les dendogrammes ne concordent pas avec ceux obtenus par d'autres techniques. L'utilisation des isoestérases pour séparer les espèces constitue une approche simple, rapide, peu coûteuse et donnant des résultats reproductibles. (Résumé d'auteur

Validation of unsteady flamelet / progress variable methodology for non-premixed turbulent partially premixed flames

This paper highlights the modeling capabilities of UFPV approach for the modeling of turbulent partially premixed lifted flames to capture the extinction and re-ignition phenomena. Large eddy simulation (LES) with the probability density function (PDF) approach provides the turbulence-chemistry interaction. All scalars are represented as a function of mean mixture fraction, mixture fraction variance, mean progress variable and scalar dissipation rate. Mixture fraction is assumed to follow a β-PDF distribution. Progress variable and scalar dissipation rate distributions are assumed to be a δ-PDF. Results are compared with experimental data of a vitiated co-flow burner with fuels like CH4/Air and H2/N2. Results of radial plots for temperature, mixture fraction and scattered data of temperature with mixture fraction at various axial locations are compared. Lift-off height for a CH4/Air flame appears to be over-predicted while the predicted lift-off height for a H2/N2 flame shows an under-prediction

Unsteady flamelet / progress variable approach for non-premixed turbulent lifted flames

The unsteady flamelet/progress variable approach has been developed for the prediction of a lifted flame to capture the extinction and re-ignition physics. In this work inclusion of the time variant behavior in the flamelet generation embedded in the large eddy simulation technique, allows better understanding of partially premixed flame dynamics. In the process sufficient simulations to generate unsteady laminar flamelets are performed, which are a function of time. These flamelets are used for the generation of the look-up table and the flamelet library is produced. This library is used for the calculation of temperature and other species in the computational domain as the solution progresses. The library constitutes filtered quantities of all the scalars as a function of mean mixture fraction, mixture fraction variance and mean progress variable. Mixture fraction and progress variable distributions are assumed to be -PDF and d-PDF respectively. The technique used here is known as the unsteady flamelet progress variable (UFPV) approach. One of the well known lifted flames is considered for the present modeling which shows flame lift-off. The results are compared with the experimental data for the mixture fraction and temperature. Lift off height is predicted from the numerical calculations and compared with the experimentally given value. Comparisons show a reasonably good agreement and the UFPV combustion model appear to be a promising technique for the prediction of lifted and partially premixed flames

Bacterial assessment of effluents from selected abattoirs into adjoining water bodies in Kaduna Metropolis

Abattoir effluents discharged into water bodies have high health implications. The study was carried within Mar to September 2019, to isolate and characterize bacteria from effluents discharged into water bodies from three Local Government Area Kaduna South (Kakuri), Chikun (Sabo-Tasha) and Kaduna North (Kawo) abattoirs within Kaduna metropolis. Three hundred of water samples were collected during the period of study. The samples were analyzed for bacterial content using standard Spread plate technique. The water samples collected content the mixture of blood, urine, piece of bone, faeces, etc. The result obtained from the water samples from the three abattoirs showed a bacterial high means count of 3.5 x 103CFU/mL Kakuri abattoirs showed means bacterial count of 2.40x103CFU/mL, Sabo abattoirs showed means count of 2.20 x103CFU/mL and Kawo abattoir showed means of 1.90 x 103 CFU/mL Escherichia coli, Staphylococcus aureus, Klebsiella sp., Salmonella sp., Enterobacter sp., Shigella sp. and Preteus sp. were isolated from waste water samples obtained from the three abattoirs. Analysis of the water sample obtained from the three abattoirs were observed to have a high numbers of bacterial that are harmful to human like E. coli. There is need to study the ecological implication of these  bacteria. Keywords: Abattoirs, Bacterial Content, Characterize, Effluent and Metropolis

Fisher profiles and perceptions of sea turtle-fishery interactions: case study of East Coast Peninsular Malaysia

The paper focuses on coastal fisheries, particularly examining sea turtle-fishery interactions and determining the socioeconomic profile and perception of local fishers about sea turtle issues along the East Coast of Peninsular Malaysia.Turtle fisheries, Nature conservation, Coastal fisheries, Man-induced effects, ISEW, Malaysia, Malaya, Pahang, Malaysia, Malaya, Kelantan, Malaysia, Malaya, Terengganu,