JFAS_Vol 09 N 02
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Item 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.Item Synthesis Of Mcm-41 Nanomaterial From Algerian Bentonite: Influence Of Synthesis Ph(University of Eloued جامعة الوادي, 2017-05-01) Ali-dahmane, T.; Brahmi, L.; Hamacha, R.; Villieras, F.; Bengueddach, A.Mesoporous materials of the MCM-41 type were synthesized from Algerian bentonite as an aluminosilicate source without the addition of pure silica and aluminum reagents. The samples were synthesized under hydrothermal condition using cetyltrimithylammonium bromide (CTAB) as surfactant. The influence of initial synthesis pH on the material properties of as-synthesis MCM-41 samples was studied at different temperatures of crystallization. The samples were characterized using several techniques e.g. X-ray diffraction (XRD), N2 adsorption-desorption and transmission electron microscope (TEM). The experimental results showed that bentonite can be used as an aluminosilicate source for the synthesis of Al-MCM-41. By decreasing the synthesis temperature of crystallization, it is necessary to decrease the synthesis pH value to form the best ordered hexagonal phase and eliminate the lamellar phase.Item Study Of The Propolis Extract As A Corrosion Inhibitor Of Copper Alloy In Ethylene Glycol / Water 0.1 M Nacl(University of Eloued جامعة الوادي, 2017-05-01) Hachelef, H.; Benmoussat, A.; Khelifa, A.; Meziane, M.The effect of propolis extract as a corrosion inhibitor of copper alloy in ethylene glycol / water 0.1 M NaCl solution was studied by electrochemical measurements. The Tafel polarization curves showed that the propolis extract at different concentration acts as mixed inhibitor, and the maximum value of the inhibitory efficacy is 73.28% at optimum concentration of 1.25 g/L of propolis extract. The activation parameters reveal that the inhibitor molecules on copper surface are absorbed by physisorption and obey Langmuir isotherm adsorption. These results were supplemented by IR Spectroscopy, Scanning electron microscopy (SEM) and EDX spectrum of chemical composition. The metal solution interface is simulated as a physical model by using Electrochemical Impedance Spectroscopy (EIS).Item 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.Item 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.Item 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.Item 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.Item Study The Rate Of Fertility And Risk Factors Of Schizophrenia In Najaf, Iraq(University of Eloued جامعة الوادي, 2017-01-01) Ajeena Ezzate, H.This study is designed to investigate the main risk factors, which increased the incidence of schizophrenia and the rate of fertility in patients measuring sex hormones (testosterone and estrogen) and prolactin hormone. The aim of study was to evaluate the fertility rate and risk factors of schizophrenia. Blood samples were collected for measuring the hormones from 108 individual divided groups: Patients’ group that contain 78 patients and a control group, which included 30 healthy persons. The results showed that schizophrenia was higher in male than female. Tobacco smoking and family history have significantly risk for most patients which lived in urban areas. There was statistical significance (P ≤ 0.05) in the testosterone hormones between patients group and control group. It is concluded that patients were suffering from hypogonadism, in contrasts with the prolactin hormone, which has been indicated significant increasing of schizophrenia.Item 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.Item The Richness And Diversity Of Lepidoptera Species In Different Habitats Of The National Park Theniet El Had (algeria)(University of Eloued جامعة الوادي, 2017-05-01) Kacha, S.; Adamou-djerbaoui, M.; Marniche, F.; De Prins, W.The diversity of Lepidoptera in several habitats of the National Park Theniet El Had (P.N.T.E.H.) was studied during twelve months of the years 2015 and 2016 in several habitats and totalising 851 specimens belonging to 17 families, 9 super families and 60 species. Among these 31 butterflies and 35 moths were recorded. the clairière (grass fields) turned out to be the most species-rich with 54 species, followed by cédraie with 39 species, the yeusaie with 33 species, the suberaie with 30 species, the zénaie with 29 species and finally the pinaie with only 22 species. The family Nymphalidae was the most dominant one in the parc with 32.48%. The diversity index (H’ and H’max) and the equitability (E) calculated for the 6 types of habitats is H’= 2,74 bits, H’max = 4,09 bits and E = 0,67 bits, meaning that the Lepidoptera species are at equilibrium with the different types of habitat which were studied.Item Synthesis, Quantum Chemical Computations And X-ray Crystallographic Studies Of A New Complex Based Of Manganese (+ii)(University of Eloued جامعة الوادي, 2017-05-01) Benyza, N.; Messai, A.; Hamdaoui, A.; Lanez, T.; Sayin, K.The ligand oxime, C7H9N5O2, was Synthesis and characterises with different characterization methods such as 1H NMR and FTIR spectroscopy. The complexation of this ligand with manganese (II) perchlorate yielded pink crystals of formula [Mn (C7H9N5O2)2]2+, 2[ClO4]-, which crystallized in the monoclinic space group P21/n with a = 12.824(3), b=13.799(2), c=15.441(4)Å, β = 100.17(2), and Z = 4. The complex consists of cations (+II) and two perchlorate anions, the cations part existing in a slightly distorted octahedral complex. Computational investigations of manganese (II) complex are done by using the DFTmethod with B3LYP functional in conjunction with the 6-31G(d,p) and lanl2dz basis sets in the gas phase imposing the C1 and C2v symmetries.Item Synthesis Of Methods To Assess Farms’ Sustainability(University of Eloued جامعة الوادي, 2017-05-01) Mhamdi, N.; Darej, C.; Benlarbi, M.; Mhamdi, H.Sustainability became a central exit in the agricultural sector, all for researchers, producers and decision makers. Sustainable agriculture is a mode which produces abundant food without exhausting the earth resources or polluting its environment. It is also the agriculture of the statutory values, one whose success is not distinguished from the vibrating rural communities, of the rich person lives for families, and safety for each one. Sustainability in agriculture is attached to broader exits of the total economy. The main aims of this review paper are: (1) formulate definitions of sustainable development, (2) identify and know the components and the aspects of sustainability at the farm level, and (3) mention methods of sustainability’s evaluation.Item Prediction Of Diagenesis And Reservoir Quality Using Wireline Logs: Evidence From The Upper Triassic (raethian) Fluvial Reservoir Tags - Toual Field, Gassi Touil Area, Se Algeria(University of Eloued جامعة الوادي, 2017-05-01) Mazouz, E.; Hamimed, M.; Yahiaoui, A.; El-ghali, M. A. K.Reservoir quality is mainly controlled by environment deposit type and diagenesis processes. To investigate such subject we usually proceed to microscopic techniques. Absence of outcrops and missing of core samples let us use conventional wireline logs and core lab measurements as primary data. Direct lecture of well logs calibrated by core photos and wellsite description, well logs correlation and cross plots were our main methodology axis. Target of this study is the fluvial Shaly Sandstones of Upper Triassic (Rhaetian) reservoir (abreviated in French; TAGS) located in Toual field – SE of Algeria. The present investigation confirms the absence of clean sandstone levels in the studied reservoir. It detects also the presence of halite and clays (Illite) as cements in sandstone. The influence of illite on permeability was confirmed whereas porosity is less affected.Item 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.Item Thermal, Electrochemical And Mechanical Properties Of Shape Memory Alloy Developed By A Conventional Processing Route(University of Eloued جامعة الوادي, 2017-05-01) Ahmad, T.; Malik, A. N.; Raza, S. S.; Kamran, M.; Manzoor, M. U.; Salman, A.; Hussain, F.; Riaz, F.; Ahmad, R.; Akhtar, M. N.A Cu based shape memory alloy (Cu-Al-Ni) having a composition 83% Cu, 14% Al, 3% Ni, was developed and studied to determine the shape memory effect. Powder of Cu, Al and Ni was melted in a pit furnace at about 15500C, and casted alloy was heat treated at 8500C for a period of 50 minutes followed by water quenching. Microstructure characterization of alloy (Cu-Al-Ni) was carried out to determine the pre-quenched (cast structure) and quenched martensitic structure. The microstructure analysis of developed samples showed needle like structure of quenched martensite after heat treatment. It has a very good resemblance with structure of casted shape memory alloy obtained from the vacuum induction process. The Vickers hardness test was also performed. Quenched microstructure with improved hardness than pre-quenched structure was observed.Item 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.Item 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.Item 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.Item 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.Item 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.