JFAS_Vol 09 N 02

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The Bipolaron Model In Transport Properties Of Yba2cu3oy Superconductor Prepared By Adding Pr2co7 Magnetic Nanoparticles
(University of Eloued جامعة الوادي, 2017-05-01) Mani Kongnine, D.; Hamrita, A.; Napo, K.
Samples with the addition of ferromagnetic nanoparticles of Pr2Co7 on YBa2Cu3Oy (YBCO) polycrystalline superconductor were prepared by the standard solid state reaction method. The analysis of x-ray diffraction patterns by Rietveld refinement indicates orthorhombique to tetragonal phase transformation and oxygen rate reduction from x=0.3% of Pr2Co7 content. Resistivity at room temperature increases as Pr2Co7 content increases. The normal state resistivity versus temperature was analyzed properly by the bipolaron model. It suggested the increase of mobile charge localization with Pr2Co7 content.
Capnodis Tenebrionis (linnaeus, 1758) Larval And Nymphal Lodges Dispositions According To Physico-chimical Composition Of Prunus Domestica And Prunus Cerasus
(University of Eloued جامعة الوادي, 2017-05-01) Brahimi L. .; Djazouli Z. E.
Capnodis tenebrionis is a Coleoptera presented as a xylophagous insect specialist, common of the Rosaceae orchards. The physico-chemical quality of host plants can provide useful information to define the most appropriate time for control of this pest. From this perspective, the present study focused on the positions of larval lodges of C. tenebrionis on its hosts Prunus spp. The results showed that the larval availability depend on water soluble and soluble proteins in spite of the total sugars on Prunus domestica and of proline on P. cerasus, respectively. The high density of P. cerasus wood appears to have favored the trophic orientation of Capnodis larvae to P. domestica. Therefore, understanding the life history traits of C. tenebrionis will be necessary to improve its monitoring that appears to be influenced by biotic factors.
Chronic Dehydration Affects Hydroelectrolytic Equilibrium And Adrenal Gland Morphology In Wistar Rat: Comparison With Gerbillus Tarabuli
(University of Eloued جامعة الوادي, 2017-05-01) Dekar-madoui, A.; Aouichat, S.; Touati, H.; Ouali-hassenaoui, S.
Shortage of water supply is the most stressful condition that can meet man and animals. Since the adrenal gland plays a pivotal role in the stress response, the objective of this work is to study, in the male Wistar rat, the repercussions of chronic dehydration on adrenal gland structure compared to that of a desert rodent: Gerbillus tarabuli. Adults and male Wistar rats and gerbils were divided into: i) control rats (n=8) given free access to tap water); ii) dehydrated rats (n=8) given 2% NaCl solution ad libitum for 7 days and (iii) G.tarabuli (n=6) given barely seeds ad libitum without access to water. Chronic dehydration caused strong adreno-chromaffin cells degranulation in rats. For the gerbils, adrenal zona fasciculate and medulla features suggest respectively an increased production and release of glucocorticoides but a basal stress hormones release. These results suppose that shortage of water in arid environment does not represent a stress factor for this species.
Comparison Of Protein Extraction Methods For The Leaves Of Ficus Deltoidea
(University of Eloued جامعة الوادي, 2017-05-01) Abdullah, F. I.; Chua, L. S.; Rahmat, Z.
This study investigated several extraction methods for proteins from the leaves of Ficus deltoidea. The protocols include solvent based extraction, TCA-acetone precipitation, Tris buffered phenol extraction and hybrid technique of TCA-acetone/phenol-SDS. The results indicated that the hybrid technique and Tris buffered phenol method could produce higher number and better quality of proteins. There are 22 protein bands with the wide range of molecular size ranging from 8.20 to 113.48 kDa separated by 12% polyacrylamide gel electrophoresis in the hybrid technique. Tris buffered phenol could extract 13 protein bands from the plant, but only 9 protein bands from TCA-acetone precipitation method. pH 8.0 was the optimum value of Tris buffered phenol for protein extraction with higher protein content and better gel resolution.
Contribution Of G.i.s. For The Survey And The Management Of Water Resources In The Basin “benhandjir – Tirkount” (ain Sefra) – Mounts Of Ksour - Saharian Atlas – Algeria
(University of Eloued جامعة الوادي, 2017-05-01) Rahmani, A.; Bouanani, A.; Kacemi, A.; Baba Hamed, K.
This work relates to the space numerical data processing, containing information having a relationship with the study and the management of the water resources of the basin of « Benhandjir – Tirkount » (Ain Sefra) characterized by his principal aquifer system of the lower Cretaceous sandstone. The study aims to geographical information system (GIS). The adopted methodology is based on two steps. The first approach practical was to reconstitute the aquifer geometry and study of the hydrodynamic and hydrochemical parameters. Analysis of an important variation of the flow and mineralization helped highlight the leading role hydrogeological fault “Ras Touil-Ain Sefra”. The second approach methodological, elaboration from the thematic analyses the synthetic map will serve as a support to a better approach for the management and to identify the zones that are most favourable to wells for the drinkable water, and the agriculture.
Dairy Production And Sources Of Cellular Variability Of Milk Of Cow's In Two Large Farms In Semi-arid Environment (tunisia Coastal)
(University of Eloued جامعة الوادي, 2017-05-01) M’sadak, Y.; Hamed, I.
This investigation, referring to a description of the Individual Counts Cellular (CCI) of milk, accompanied by an analysis , so some quantitative and qualitative milk parameters that a number of physiological and zootechnical factors of cellular evolution, was performed on two large cattle farms conducted in semi-arid coastal environment (region of Sousse, Tunisia), subject tri-daily in mechanical milking room. It is especially striking that the arithmetic mean (MA) of the CCI cows's was 371000 cell. / ml, while the geometric mean (MG) of the CCI cows's was only 107500 cell. / ml. The median was 73,000 cells. / ml, value close to the MG and widely spaced from the MA, thus telling the usefulness of the MG. A great heterogeneity of cell quality of the milk was noted, however, without clearly identify correlation with the chemical composition of milk. In two large herds followed, the variation of CCI was inversely related to dairy productions. On the other hand, the CCI found an increase with the rank of lactation, the stage of lactation and the spring season of calving.
Development Of An Objective Method For The Assessment Of Nylon Sutures Knot Security
(University of Eloued جامعة الوادي, 2017-05-01) Turki, S.; Ben Abdessalem, S.
A perfect wound healing requires sutures having many handling characteristics such as good knot security and flexibility. Knot security characteristics are influenced by a variety of physical and mechanical parameters including the friction coefficient, bending rigidity and compressibility of the suture. Knot security and other handling characteristics are evaluated only by surgeons during the implantation. There are no standard tests to evaluate these qualities. We present in this paper an objective method to assess knot security of nylon sutures. This method is based on a fuzzy-logic model which correlates suture physical parameters and the knot security.
Droughts In Semi-arid Cereal Regions Of Algeria
(University of Eloued جامعة الوادي, 2017-05-01) Smadhi, D.; Zella, L.; Bachir, H.
The droughts in the semi-arid Algeria’s cereal regions are evaluated by studying the average monthly rainfall, from September to June, over the period (1941-2011), based on the first-order Markov chain. This method traces rainy and dry days, cumulative rainfall and the probability of receiving rainfall above the thresholds of 0,1, 5, 10, 20 and 30 mm, in conjunction with the cereal development cycle. The rains analysed showed that the distribution of rainy days at the chosen thresholds did not exceed the variable averages of 6 to 9 days per month. These days are characterized by random cumulative rainfall, with probabilities fluctuating between + 40% and + 80%. Hard droughts affect seeding dates and yield factors for rainfed cereals.
Effect Of Junction Quality On The Performance Of A Silicon Solar Cell
(University of Eloued جامعة الوادي, 2017-05-01) Zerbo, I.; Zoungrana, M.; Ouedraogo, A.; Bathiebo, D. J.
In this work, a modeling study of the effect of the junction quality on the performance of a silicon solar cell is presented. Based on a one dimensional modeling of the solar cell, the continuity equation of excess minority carriers is solved with boundary conditions taking into account the intrinsic junction recombination velocity and led to analytical expressions of photocurrent density, photovoltage and electric power. The effect of the intrinsic junction recombination velocity or the solar cell junction quality on photocurrent, photovoltage and electric power, is exhibited and we determine the maximum electric power, the junction dynamic velocity at the maximum power point and the conversion efficiency according to the junction quality of the solar cell. From the electric power lost at the junction, we calculated the shunt resistance of the solar cell according to the junction quality.
Effect Of Urban Albedo Surfaces On Thermal Comfort
(University of Eloued جامعة الوادي, 2017-05-01) Mansouri, O.; Bourbia, F.; Belarbi, R.
Thermal comfort was and remains a major concern of the designers, makers, planners, climatologists and others, seeking at all costs to ensure the well-being, good health and comfort of citizens in both outdoor and indoor areas. They have addressed this issue in order to identify the main causes that generate the warming of urban areas and therefore contribute to the degradation of the exterior and interior thermal comfort of the inhabitants. It turns out that the reflectivity of materials known as the albedo, plays a leading role in this degradation. A numerical study was carried out to assess the thermal comfort of citizens by applying reflective materials for roofs, facades and floor. The results show that the reflective light paints help in moderating the microclimate, contrariwise, they participate in the degradation of thermal comfort.
Geophysical Investigation On The Fracture Distribution Of Iwo-olupona Area South-western Nigeria Using Vlf-em Techniques
(University of Eloued جامعة الوادي, 2017-05-01) Sunmonu, L. A.; Suleman, K. O.; Bello, I. T.; Tijani, L. O.; Ogunbode, A. O.
This work uses Very Low Frequency Electromagnetic (VLF-EM) method to investigate the subsurface structure on a proposed Housing estate in Iwo, South-Western Nigeria with coordinates 7° 36’ 36.3” N and Longitude ≈ 4° 12’ 06.6” E. The average VLF frequency employed during the field work is 20.8 kHz with average signal strength of 17dBm and the measuring interval of 20m. The data obtained by the VLF-EM method were analysed by 2D-line Plotting. Raw real, R (In phase) and the imagining, I (quadrature) components were measured on the field. The Raw Real and filtered real data were plotted against stations on the same graph using excel, the graphs obtained are sinusoidal in shape with the peak indicating a conductive zones, resulting from weak geologic materials that may be due to fracture, joints, crack, and the trough indicates a non-conductive zones, associated with competent material which may be attributed to fresh basement material or resistive geological formation.
Hydrological Modeling In Semi-arid Region Using Hec-hms Model. Case Study In Ain Sefra Watershed, Ksour Mountains (sw-algeria)
(University of Eloued جامعة الوادي, 2017-05-01) Derdour, A.; Bouanani, A.; Babahamed, K.
Ain Sefra is one of the Algerian cities that had been experienced several devastating floods during the past 100 years. The purpose of this study is to simulate rainfall-runoff in the semi-arid region of Ain Sefra watershed through the employing of HEC-HMS model. In this paper, the frequency storm is used for the meteorological model, the SCS curve number is selected to calculate the loss rate and SCS unit hydrograph method have been applied to simulate the runoff rate. After calibration and validation, the simulated peak discharges were very closed with observed values.The Nash-Sutcliffe efficiency coefficient was 0.95 which indicated that the hydrological modeling results are satisfactory and accepted for simulation of rainfall-runoff. The peak discharges obtained for the 10, 50, 100 and 1000 years storms were respectively 425.8m3/s, 750.5m3/s, 904.3m3/s and 1328.3m3/s.
Mapping Of Land-cover From Remotely Sensed Images In The Valley Of Oued Righ (algerian Southeast)
(University of Eloued جامعة الوادي, 2017-05-01) Boussaada-maabdi, N.; Bousnoubra-kherici, H.; Kherici, N.; Hammad, N.
The aim of this work is to analyze the evolution of arid areas by remote sensing and to assess the extent of landscape changes over time. The study consists of a multitemporal analysis of LANDSAT TM and ETM + satellite images from 1987, 2000 and 2009 covering the Oued Righ valley in south-eastern Algeria. Numerous colored compositions carried out, allowed us a very good visual characterization of the surface states. Supervised classification charts, carried at the second step, are of good quality as indicated by the precision indices and Kappa indices from the various confusion matrices. The change maps obtained by diachronic analysis of the classifications carried out show a clear modification of the natural landscape with a significant increase in the surface of the water, the number of the population and a reduction of the palm groves.
Model For Optimum Design Of Standalone Hybrid Renewable Energy Microgrids
(University of Eloued جامعة الوادي, 2017-05-01) Abdulkarim, A.; Abdelkader, S. M.; Morrow, D. J.
An optimization model for the design of a hybrid renewable energy microgrid supplying an isolated load has been developed. This is achieved in two steps. The first step developed a linear programming model that uses the average pattern of demand, wind, and solar energy to determine the optimal configuration. The second step used a clustering algorithm to investigate the methods of improving the reliability of the system. These include increasing the storage capacity and increasing the rated power of the wind energy conversion system (WECS) or solar energy conversion system (SECS). The results have shown that increasing the capacity of storage is the most economical way of improving the reliability of the system. The model has been verified through applications to a test microgrid of common size. The results have shown a 70% reduction in gas emissions and an 80% reduction in energy costs.
Numerical Simulation Of Solar Cells Besed Czts Buffer Layer (zno1-xsx) Using Scaps-1d Software
(University of Eloued جامعة الوادي, 2017-05-01) Fadili, S.; Hartiti, B.; El Khalidi, Z.; Kotbi, A.; Ridah, A.; Thevenin, P.
Cds buffer layer has many advantages such as large bandgap, and the carrier density. Otherwise, the presence of cadmium is an inconvenient. Research work, are shifted on the possibility of replacing CdS by a buffer layer devoid of cadmium. This manuscript presents the numerical study, using SCAPS-1D program, the effects of sulfur content in the buffer layer Zn (O,S) on the electrical parameters of the solar cell ZnO: Al / i-ZnO / Zn (O, S) / CZTS /. Changes in the band gap and electron affinity of Zn (O, S) were calculated from the law of Vegard. The numerical results of the thickness of the absorbent layer CZTS equal to 2.5µm, show that from the sulfur content equals to 45% we can find the same results with CdS, an efficiency varies slightly, about 19%.
Petroleum-hydrocarbons Biodegradation By Pseudomonas Strains Isolated From Hydrocarbon-contaminated Soil
(University of Eloued جامعة الوادي, 2017-05-01) Benchouk, A.; Chibani, A.
Many indigenous microorganisms in water and soil are capable of degrading hydrocarbon contaminants. In this study, two bacterial strains were isolated from a contaminated soil of a refinery of Arzew (Oran). The isolated strains were identified as Pseudomonas aeruginosa (P3) and Pseudomonas fluoresens (P4). The capability of these isolates to degrade petroleum was performed by measuring the optical density, colony forming unit counts (CFU/ml) and concentration of total petroleum hydrocarbons (TPH). Degradation of Isomerate by these isolates was analyzed by gas chromatography with flame ionization detector (FID). Results indicated that the isolates can use petroleum as carbon source. Isolates P3 has the highest capability of hydrocarbons degradation.
Photoinitiated Polymerization Of A Dental Formulation: 1. Influence Of Photoinitiating System, Temperature And Luminous Intensity
(University of Eloued جامعة الوادي, 2017-05-01) Bayou, S.; Mouzali, M.; Lecamp, L.; Lebaudy, P.
The photoinitiated polymerization of a dental formulation is composed of Mixture of monomers 75%Bis-GMA/25%TEGDMA and CQ/DMAEMA as radical photoinitiator was studied by using isothermal photocalorimetry. The effect of temperature, light intensity and photoinitiating system concentration on reaction was investigated. A maximum conversion was obtained for a photoinitiator system concentration of 1% (w/w) and for the highest light intensity studied. It should be noted that a correlation between the glass transition temperature of the final polymer and the conversion has been studied.
Physical And Mechanical Behaviour Of A Roller Compacted Concrete Reinforced With Polypropylene Fiber
(University of Eloued جامعة الوادي, 2017-05-01) Benouadah, A.; Beddar, M.; Meddah, A.
In order to study the behaviour of a roller compacted concrete (RCC) reinforced with polypropylene fiber, six types of RCC were made with different content of fibers (0, 0.5, 1, 1.5, 2 and 2.5 Kg/m3). The physical parameters are the density, the workability, the shrinkage and the water absorption. For the mechanical parameters; the performances such as the compressive strength and the tensile strength (3 point bending and splitting) has been studied. The results show that the RCC reinforced with fibers present the better performances in terms of strength and physical behaviour. The results obtained show the positive effect of the polypropylene fiber addition on the mechanical strength, which increases about 23% for the mixture with 1 Kg/m3. For the physical properties, there is a decrease in the density and workability and an improvement in the water absorption proportional with the addition of polypropylene fiber. In addition, we conclude the positive effect of polypropylene fiber on the kinetics and development of the shrinkage. In this study, the best physical and mechanical performance was being observed in the mixture with 1 Kg/m3 of polypropylene.
Phytochemical Study And Antibacterial Activity Of Different Extracts Of Pistacia Lentiscus L Collected From Dahra Region West Of Algeria
(University of Eloued جامعة الوادي, 2017-05-01) Missoun, F.; Bouabedelli, F.; Benhamimed, E.; Baghdad, A.; Djebli, N.
The purpose of this study was to investigate the phytochemical proprieties, antioxidant and antibacterial activities of different extracts of Pistacia lentiscus on two pathogenic bacteria. The concentration of total phenols was analyzed using Folin-Ciocalteu’s method. Exracts of plant were evaluated for their antimicrobial activities against Staphylococcus aureus and Esherichia coli using the agar disk diffusion method and the minimal inhibitory concentration. The phytochemical study revealed the presence of major bioactive chemical constituents in different extracts of P. lentiscus (flavonoids, alkaloids, saponins, tannins, terpenoids, glycosides and steroids). Results showed that this plant has antioxydant activity and high quantity of total phenols and flavonoids. Antibacterial activity of the aerial parts of P. lentiscus against tested bacteria has shown that Gram-negative strains were more resistant compared to the Gram- positive ones. We can conclude that Pistacia lentiscus from Dahra region under investigation can be a potential source of useful drugs.
Phytoecological Study Of Tetraclinis Articulata In The Woodland Of Beni Affene, Sdamas Chergui (tiaret, Algeria)
(University of Eloued جامعة الوادي, 2017-05-01) Azzaoui, M. E.; Maatoug, M.; Berrayah, M.
The Mediterranean flora is definitely considered as an exceptional diversity that deserves particular attention to be conserved. This work aims to quantify the floristic diversity of Tetraclinis articulata of Beni Affane located at the woodland of Sdamas Chergui (Tiaret, Algeria). The factorial analysis of correspondences allowed us to jointly process the floristic and ecological variables, and confirm that there is presently an original floristic facies of Tetraclinis articulata. This study area contains 13 families and 21 species, where the dominating biological type is Chamaephytics (52 %). We have described as well five frequent species: Tetraclinis articulata 33 %, Pistacia lentiscus 11 %, Globularia alypum 8 %, Phylleria angustifolia 9 %, Rosmarinus tournefortii 15 %.

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