Effets d’une partielle substitutionde la farine de poisson par la farine de soja sur la croissance des juvéniles de la perche du Nil (Lates niloticus, Linnaeus 1758)

La présente étude a été menée pour évaluer les effets de l’incorporation de la farine de soja dans le régime alimentaire des juvéniles de la perche du Nil. Ce travail est réalisé sur des juvéniles de 1g élevés dans des aquariums de 50 l. Cinq régimes alimentaires isoprotéiques (45% de protéines) contenant différents taux de farine de soja 0%, 26%, 36%, 51% et 60% noté respectivement A, B, C, D et E ont été préparés. Chaque régime a été assigné de façon aléatoire à trois groupes de poissons nourris à satiété durant 8 semaines. Les résultats obtenus montrent que les meilleures performances de croissance et d’efficacité alimentaire sont obtenues avec les régimes nourris avec la farine de poisson (A), suivis dans l’ordre des régimes B, C, D et E. Les taux de croissance spécifiques (TCS) varient entre 3,26% et 3,77% respectivement chez les poissons nourris avec les régimes A, B, C, D et E. Le coefficient d’efficacité protéique (CEP) a varié de 2,07 à 1,6. Les résultats statistiques montrent que le meilleur CEP est obtenu avec le régime A (P< 0.05) et le plus faible avec le régime E. Les résultats de la présente étude indiquent qu’il est possible d’incorporer 51% de la farine de soja dans l’alimentation des juvéniles de Lates niloticus sans compromettre leur croissance.Mots clés: Perche du Nil, Lates niloticus, farine de soja, grossissement, alimentation

Décompositions de la bouse de bovin sèche et macrofaune associée en zone sahélienne semi-aride (Matam, Sénégal)

L’étude de la décomposition de la bouse de bovin sèche a été effectuée entre avril 2010 et mai 2011 dans une savane sahélienne à Matam (Sénégal). L’objectif de l’étude était d’identifier la macrofaune impliquée dans la dégradation de la bouse ainsi que l’effet des saisons et de la profondeur d’enfouissement sur l’activité des décomposeurs. L’étude a été effectuée dans trois milieux différents par la pédologie, la végétation et le degré d’anthropisation. Des sacs à bouse de 1 mm, 4 mm et 12 mm de mailles ont été enfouis à des profondeurs de 10, 20, 30 et 40 cm. Au cours de l’année, 4 relevés ont été effectués. Les résultats obtenus montrent que i) l’essentiel de la faune impliquée dans la dégradation de la bouse sèche appartient à l’Ordre des Isoptères, ii) la profondeur n’a pas d’effet sur la dégradation, iii) l’activité de la macrofaune est plus importante juste après la saison des pluies dans les 3 milieux étudiés.© 2013 International Formulae Group. All rights reserved. Mots clés : Enfouissement bouse sèche, macrofaune, perte de masse, sahélien, Matam, Sénégal

A detailed analysis of online pharmacy characteristics to inform safe usage by patients

Background: Evidence suggests that consumers potentially put themselves at risk when purchasing medicines on-line. Whilst logos provided by regulators may provide some level of reassurance there may be other indicators which could be used by consumers to identify those websites which may be safely used. Objectives: Identify characteristics of on-line pharmacies which are related to whether websites are regulated or non-regulated and those characteristics which could be used by patients to increase the likelihood of accessing regulated sites. Setting: Online pharmacies which supply diazepam, fluoxetine and simvastatin. Methods: Using piloted search terms via Google and Yahoo search engines, identified websites were screened for regulatory status, adherence to regulatory standards, administrative requirements, clinical assessment requirements and additional details deemed to be of relevance to a user. Characteristics of regulated and non-regulated (defined as those with an absence of a correctly linked regulatory logo) websites were compared to identify differences which could be used to improve patient safety. Main outcome measure: Regulatory status, adherence to regulatory standards, quality of information provision, barriers to medicines access. Results: 113 websites sold diazepam, fluoxetine and simvastatin; were identified within the first 100 results. Less than quarter were found to be regulated online pharmacies. 80 websites were willing to sell the medication without a prescription. The unregulated internet pharmacy websites (defined as those with an absence of a correctly linked regulatory logo) were found to adhere more closely to the clinical criteria, were less significantly likely to disclose a contact name and address, telephone number of the pharmacy or demand a prescription prior to sale (P\0.05, Fisher’s Exact). Conclusions: The three prescription-only medicines which are liable to abuse, have potentially serious interactions and require counselling to ensure patient safety are readily available via the internet. When purchasing medicines via this route UK consumers should be made aware of the importance of regulatory logos and additionally should ensure that the seller can be meaningfully contacted by the contact details provided. The provision of clinical information should not be used alone as an indication of the seller’s provenance

Performance of Cochorus olitorius as influenced by soil type and organic manure amendments in Yewa North Local Government Area, Ogun State

An experiment was conducted in Yewa North Local Government Area, Ogun State to evaluate the effect of four soil types (loamy, sand, clay and silt) amended with poultry manure (PM), plant manure (PLM), sheep/goat manure (SGM) and NPK on performance of Cochorus olitorius. It was a factorial experiment in completely randomized design. Pre-treated seeds were planted and watered daily. Agronomic data collected on days after planting were plant height, number of leaves and stem girth. Data were analyzed using generalized linear model of SAS version 9.1. Means were separated by least significant difference at P < 0.05. Results obtained indicated that loamy soil had significantly higher plant height, number of leaves and stem girth than other soil types. Silt had the least values for all the parameters measured. Performance of the soil types were in the order Loam > Sand > Clay > Silt. PLM had significantly higher plant height and stem diameter than PM and NPK but not significantly different from that of SGM. Loamy soil amended with either PLM or SGM performed better for all the parameters measured and therefore recommended in this study.Keywords: Organic manure, plant manure, soil type, Cochorus olitorius.African Journal of Biotechnology Vol. 9(33), pp. 5309-5312, 16 August, 201

Multi-lepton signals from the top-prime quark at the LHC

We analyze the collider signatures of models with a vector-like top-prime quark and a massive color-octet boson. The top-prime quark mixes with the top quark in the Standard Model, leading to richer final states than ones that are investigated by experimental collaborations. We discuss the multi-lepton final states, and show that they can provide increased sensitivity to models with a top-prime quark and gluon-prime. Searches for new physics in high multiplicity events are an important component of the LHC program and complementary to analyses that have been performed.Comment: 7 pages, 4 figures, 2 table

Eddy Current Response to Three-Dimensional Flaws by the Boundary Element Method

In planning an inspection procedure, or in designing parts with flaw detectability as a design goal, it is essential that the engineer have available some form of model for estimating the probability of flaw detection. In the past this need has been met, with varying degrees of success, by relying on experience in the inspection of similar parts, sometimes supplemented by experimental testing. With the rapid advances in computer technology in recent years, it is now feasible to consider replacing, or at least enhancing, such practices with predictions based on numerical simulation of the flaw detection process [1]

Colored Resonant Signals at the LHC: Largest Rate and Simplest Topology

We study the colored resonance production at the LHC in a most general approach. We classify the possible colored resonances based on group theory decomposition, and construct their effective interactions with light partons. The production cross section from annihilation of valence quarks or gluons may be on the order of 400 - 1000 pb at LHC energies for a mass of 1 TeV with nominal couplings, leading to the largest production rates for new physics at the TeV scale, and simplest event topology with dijet final states. We apply the new dijet data from the LHC experiments to put bounds on various possible colored resonant states. The current bounds range from 0.9 to 2.7 TeV. The formulation is readily applicable for future searches including other decay modes.Comment: 29 pages, 9 figures. References updated and additional K-factors include

Effect of water vapor on the spallation of thermal barrier coating systems during laboratory cyclic oxidation testing.

The effect of water and water vapor on the lifetime of Ni-based superalloy samples coated with a typical thermal barrier coating system—b-(Ni,Pt)Al bond coat and yttria stabilized zirconia (YSZ) top coat deposited by electron beam physical vapor deposition (EB-PVD) was studied. Samples were thermally cycled to 1,150 C and subjected to a water-drop test in order to elucidate the effect of water vapor on thermal barrier coating (TBC) spallation. It was shown that the addition of water promotes spallation of TBC samples after a given number of cycles at 1,150 C. This threshold was found to be equal to 170 cycles for the present system. Systems based on b-NiAl bond coat or on Pt-rich c/c0 bond coat were also sensitive to the water-drop test. Moreover, it was shown that water vapor in ambient air after minutes or hours at room temperature, promotes also TBC spallation once the critical number of cycles has been reached. This desktop spalling (DTS) can be prevented by locking up the cycled samples in a dry atmosphere box. These results for TBC systems confirm and document Smialek’s theory about DTS and moisture induced delayed spalling (MIDS) being the same phenomenon. Finally, the mechanisms implying hydrogen embrittlement or surface tension modifications are discussed

Top and Bottom Seesaw from Supersymmetric Strong Dynamics

We propose a top and bottom seesaw model with partial composite top and bottom quarks. Such composite quarks and topcolor gauge bosons are bound states from supersymmetric strong dynamics by Seiberg duality. Supersymmetry breaking also induces the breaking of topcolor into the QCD gauge coupling. The low energy description of our model reduces to a complete non-minimal extension of the top seesaw model with bottom seesaw. The non-minimal nature is crucial for Higgs mixings and the appearance of light Higgs fields. The Higgs fields are bound states of partial composite particles with the lightest one compatible with a 125 GeV Higgs field which was discovered at the LHC.Comment: Minor changes, Published Versio