JFAS_Vol 09 N 01

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Theoretical Studies Of Ethylnitrolic Acid Using Gaussian
(University of Eloued جامعة الوادي, 2017-01-01) Nikafshar, S.; Moradi Mirazizi, Y.
The tautomerism of all possible forms of ethylnitrolic acid was investigated theoretically in various environment including gas phase, ethanol, dimethyl sulfoxide (DMSO) and water. The calculations were carried out at DFT/B3LYP and MP2 of theory singly. It was found that, form of B eythynitrolic acid is the most stable isomer in the both gas phase and solvent. The activation energies for conversion of A to R and B to A in the gas phase and solvent using two methods DFT/B3LY and MP2 were obtained. Geometrical parameters of three isomers, A, B and R, were calculated by (DFT/B3LYP and MP2) in the gas phase and solvent. Vibrational analysis and acidity constants (PKa) of two isomers (A and R) were computed in the gas phase and water using DFT/B3LYP and MP2. After that, these quantities were evaluated with experimental values and it was determined that DFT/B3LYP is more accurate to obtain PKa.
Tribological Study Of A Bronze Obtained By Sintering Proceeds
(University of Eloued جامعة الوادي, 2017-01-01) Keraghel, F.; Loucif, K.; Delplanck, M. P.
Friction is a widely observed phenomenon requiring scientific capacity in the tribological behavior of materials. Reliability specialists use language borrowed from the doctors, so they talk about teething, durations of life and death, it is true that the machines as living beings, are born, wear, get tired, suffer defaults and eventually die; That is to say, are reformed, but the comparison stops, because the machines have no nervous system or bloodstream, do not think and feel no pain. Factors that may affect the life, or the factors that affect wear are very numerous: surface characteristics, operating conditions of the lubricant, the atmosphere, and finally the time. In this work we present the effect of speed and load on the tribological characteristics of a Cu 8% Sn bronze pressure sintered self-lubricating mode for two lubricants with different viscosities.
Replacement Of Barley Grains And Dehydrated Alfalfa By Sulla Hay (hedysarum Flexuosum) And Common Reed Leaves (phragmites Australis) In Fattening Rabbits Diet
(University of Eloued جامعة الوادي, 2017-01-01) Kadi, S. A.; Mouhous, A.; Djellal, F.; Gidenne, T.
Fifty-five Algerian white population rabbits were used to study the effect of the incorporation of Sulla hay (Hedysarum flexuosum) and common Reed leaves (Phragmites australis) in a pelleted feed on the growth of rabbits. At weaning (35 d), the rabbits were divided in two groups, individually caged and received ad libitum one of the two diets during 42 d. The control diet contained barley, dehydrated alfalfa, soya bean meal and wheat bran. The other diet (RS) was formulated to totally substitute barley and dehydrated alfalfa with Sulla hay and common Reed leaves. Feed intake increased distinctly in the RS group in the second period of fattening (150 vs 126). For the whole fattening period (35-77 d), growth rate was similar in the two groups (35.4 g/d) while the feed conversion was higher (p<0.01) in RS group (3.86 vs 3.23). This confirmed that using these fibre sources in a pelleted feed was valuable for fattening rabbit.
Study Of The Extraction Of Cobalt(ii) From Sulphate Medium By Using Capric Acid Dissolved In Chloroform
(University of Eloued جامعة الوادي, 2017-01-01) Slimani, A.; Barkat, D.
In this work we have first investigated the extraction of cobalt(II) from sulphate medium using capric acid dissolved in chloroform and then the effect of other diluents on the extraction process at 25°C. This study aims to understand the behaviour followed by this metal or, in other words, find its stoichiometry at the end of the extraction. This deportment is strongly dependent on many parameters like pH of the aqueous solution, acid concentration and the nature of the solvent. Each one of these parameters will be discussed. Temperature is another parameter that will be studied in this work. At the end of this research, we have found that stoichiometry of Co(II) complex is of the type CoA2(HR)2 (HR is an abridgment of capric acid). The equilibrium constant Kex and the thermodynamic parameters ΔH°, ΔS°, and ΔG° have been evaluated.
Study Of Genitalia Morphometric Variability Of The Two Species Helix Aperta And Helix Aspersa (gasteropoda, Pulmonata)
(University of Eloued جامعة الوادي, 2017-01-01) Benbellil Tafoughalt, S.; Bendifallah, L.
Our research aims for, firstly, the study of genitalia morphometric variability of the two species Helix aperta and Helix aspersa, and the relation of this variability with individual’s weight and shell size. Secondly, differences in dimensions of the genital organs between the two studied species were investigated. This study showed, first, the existence of an important dimensional variability of genital organs in both studied species, then, a positive correlation between organs’ measurements and those of weight and shell. Finally, two genital organs, that are flagellum and proximal duct of bursa copulatrix, proved to be interesting to discriminate between the two species Helix aperta and Helix aspersa, because both organs are greater in Helix aspersa.
Geochemical Characterization The Waters Of Foggaras The Continental Intercalary Aquifer Of Timinoune Region (south West Algeria)
(University of Eloued جامعة الوادي, 2017-01-01) Benaricha, B.; Khaldi, A.; Elouissi, A.; Mouassa, S.; Zaagane, M.
The study of the Continental Intercalary (C.I) groundwater of the region of Timimoune (southwestern Algeria), based on physico-chemical data (major elements), allowed to understand the geochemistry of foggaras water. The aquifer is contained in the formations of the Lower Cretaceous (Albian and Barremian). The waters are strongly mineralized with an average value 2g / l.The waters have a clear predominance of facies chlorinated-sodium. The risk is high to excessive soil salinization, and the risk of medium alkalinity to very high. Statistical analysis led us to reach two conclusions, the first is that, variable electrical conductivity (EC), dry residue (RS), Na+, Ca2+, Cl-, SO4--, mineralization, are best correlated and responsible the signing of the mineral load of water, the second is that the nitrate ion (NO3-) opposite to the above-mentioned variables mark its anthropogenic origin.
Contribution Of Gravimetry To The Hydrogeological Recognition Of The Area Of Wadi Righ –ouargla
(University of Eloued جامعة الوادي, 2017-01-01) Melouah, O.; Zeddouri, A.
Gravimetry is a geophysical methods often used in oil exploration and mining research but rarely in the hydrogeological field, the aim of this work is to exploit the gravimetric data to develop a structural model of the region of Oued Righ - Ouargla has less than 1,000 m depth and perform a litho-stratigraphic modeling of subsurface formations to assess the ability of a karst formation of the terminal complex water table (Eocene Senonian). Multiple filtrations and signal processing techniques for gravimetric datas were operated such as the Euler Déconvolution, the analytical signal and the horizontal gradient. The results were used to evaluate the potential of karstification in the area and to model the phenomenon; the subsurface structural mapping has also led to the relationship between the well productivity and network of faults and fractures.
The Influence Of Co2+ Concentration On The Electrodeposition Of Znni Films To Obtain The Znni–co Composite Coatings
(University of Eloued جامعة الوادي, 2017-01-01) Diafi, M.; Degheche, K.; Ben Temam, H.
In this work we have done an experimental study of Zinc- Nickel composite coatings. For this, the influence of the cobalt concentration was the principal object in order to improve the resistance of the corrosion of the coatings, which has been made by electroplating on steel substrates previously treated, have been studied by several characterization methods, as the X-ray diffraction, micro-hardness measurement and scanning electron microscopy (SEM), protection against corrosion properties studied by potentiodynamic polarization measurements (Tafel) and electrochemical impedance spectroscopy (EIS) to the potential of corrosion free . The parameters wich characterize the corrosion behavior; can be determined from the Nyquist plots. It has been observed that the ternary Zn–Ni–Co alloy is characterized by enhanced the resistance of corrosion compared to the binary Zn–Ni alloys. and the addition of Co in the Zn-Ni increases the micro-hardness, XRD and SEM results and identify any coatings Zn-Ni-Co alloy composition reveals that γ-Ni5Zn21 phase, Co matrix phase and pure zinc phase.
Analysis Of The Phenotypic Variability Of Twenty F3 Biparental Populations Of Bread Wheat (triticum Aestivum L.) Evaluated Under Semi-arid Environment
(University of Eloued جامعة الوادي, 2017-01-01) Fellahi Z. . . . . . .; Hannachi A.; Ferras K.; Oulmi A.; Boutalbi W.; Bouzerzour H.; Benmahammed A.
This research was conducted to screen and analyse the variability within twenty F3 populations of bread wheat (Triticum aestivum L.) generated by Line x Tester mating design. The results indicated the presence of sufficient variability within and between F3 populations for the eight measured variables, which represent plant phenology, physiology, yield and yield components. Different populations have been identified to improve the measured variables separately. The number of spikes appeared to be the most important determinant of grain yield. PCA and cluster analyses indicated that the Acsad1069/El Wifak and Acsad1135/Hidhab, with a relatively high grain yield, aboveground biomass and 1000 grains weight, are the best F3 populations to improve the productivity. However, Acsad899/Rmada and Acsad1135/Rmada populations were earlier and had a low number of spikes. These populations had also favorable genes for heat tolerance.
Study Of Trophic Relationships Between Diaspididae Family Species -host Plants -predators And Parasitoids In Algeria
(University of Eloued جامعة الوادي, 2017-01-01) Belguendouz, R.; Biche, M.; Bendifallah, L.
The use of parasitoids and predators in biocontrol contribute to the development of sustainable agriculture, respects environment and human health. In this context, we undertook the identification of natural Diaspididae enemies located on the Algerian territory. Results highlight three predatory families: Coccinellidae, Nitidulidae and Coniopterygidae families, the first represented by the most voracious species as Rhyzobius lophantae living on 19 Diaspines observed on 121 plants, from the northern, and two parasitoid families lived on 39 Diaspididae species affecting 125 plants and were represented by four genera and 23 species such as Aphytis and Encarcia (Aphelinidae) lived on 31 diaspididae species found on 125 host plants. The most voracious and polyphagous species identified are interesting for IPM
The Evolution Of Shrinkage Strain Of Pet-mortar Composite Eco-materials
(University of Eloued جامعة الوادي, 2017-01-01) Chaib, O.; Benosman, A. S.; Kazi Tani, N.; Senhadji, Y.; Mouli, M.; Taïbi, H.; Hamadache, M.
Concretes and mortars are subjected to several kinds of shrinkage strains which represent the volumic variations resulting from the cement hydration and are governed by various physical and chemical aspects. The use of polyethylene terephthalate PET plastic wastes which are available in quantity and within low cost in our country yields a very important economic and environmental impact in the construction industry. Thus, we are interested to investigate the effect of PET volumetric additive amounts for cement substituting and for the behavior of the total, drying and autogenous shrinkage. Comparison study of obtained experimental results with codale prediction models were performed according to Eurocode 2 (EC2) in order to analyze the evolution of shrinkage strain with PET-mortar composite ages and for several rates of PET waste additions. According to obtained results, PET additions acts to reduce shrinkage strains of PET-mortar composites which promote the use of these modified mortar Eco-materials in the field of construction industry.
Desert Truffles From Northeastern Algerian Coastal Dunes: Ecology, Identification And Symbiosis
(University of Eloued جامعة الوادي, 2017-01-01) Dafri, A.; Beddiar, A.
For several years, greater attention has been focused on desert truffles of Southern and Western Algeria. The present work is the first to be concerned on desert truffles from northeastern Algerian littoral dunes. The aim of this work is to describe northeastern Algerian truffle fields, identify collected truffle species and their symbiotic plant partner. We required two years field prospections, soil analysis, ascocarps morpho-anatomical and molecular analysis. We concluded that truffle fields share an acid sandy-loam soil and a notable abundance of many subspecies of Tuberaria gutatta (L.) Fourr. 1868, proved as desert truffles symbiotic partner. Two sandy truffle species are recorded: Terfezia arenaria (Moris) Trappe (1971) and Tuber gennadii (Chatin) Patouillard 1903. This data is the first to review knowledge on northeastern desert truffles and to report Tuber gennadii in Algeria.
Diagnosis Of Rotor Fault Using Neuro-fuzzy Inference System
(University of Eloued جامعة الوادي, 2017-01-01) Merabet, H.; Bahi, T.; Drici, D.; Halem, N.; Bedoud, K.
The three-phase induction machine (IM) has a large importance and it is widely used as electromechanical system device, and because of their; robustness, reliability, and simple design with the well developed technologies. In spite of all cited advantages, the induction machines are suscptible to various types of electrical and mechanical faults that can lead easly to excessive downtimes, which can lead to tuge losses in terms of maintenance and production. This work presents a reliable approach for diagnosis and detection of broken bar faults in induction machine. The detection of faults is based on monitoring of the stator current signal. Also the calculation of relative energy value for each level of signal decomposition is determinated by using package wavelet, and this method will be useful as data input of Adaptive Neuro-Fuzzy Inference System (ANFIS). In the ANFIS approach the adaptive Neuro-Fuzzy inference system is able to identify the rotor of induction machine state with high precision.This method is applied by using the MATLAB®/Simulink software.
Synthesis, Crystal Structures, Hydrogen Bonding Graph-sets And Theoretical Studies Of Nickel (+ii) Co-ordinations With Pyridine-2,6-dicarboxamide Oxime
(University of Eloued جامعة الوادي, 2017-01-01) Hamdaoui, A.; Messai, A.; Benyza, N.; Lanez, T.; Sayin, K.
The pyridine-2,6-dicarboxamide oxime, C7H9N5O2, was Synthesis and characterises with 1H NMR and FTIR spectroscopy . The reaction of this ligand with nickel (II) perchlorate yielded green crystals of formula [Ni(C7H9N5O2)2]2+,2[ClO4]-, which crystallized in the monoclinic space group C2/c with a = 14.915(2), b = 0.895(2), c = 8.205(1) Å, β = 114.69(1), and Z = 4. The complex consists of discrete cations (+II) and one perchlorate anion, the cations existing in a slightly distorted octahedral complex with bonding through the heterocyclic and oxime nitrogen atoms. The structure is held together through N-H…O, O-H…O and C-H...O hydrogen bonds occurring between the coordinated oxime molecules and the perchlorate counter-ion. Computational investigations of nickel(II) complex are done by using M062X method with 6-31+G(d)(LANL2DZ) basis set in vacuo.
Effect Of Salt Stress On Some Physiological Parameters In Atriplex Halimus L.
(University of Eloued جامعة الوادي, 2017-01-01) Soualmi, N.; Belkhodja, M.; Adda, A.
The impact of salinity applied for five weeks followed two provenances of Atriplex halimus L. harvested from Oran (Algeria coast) and Ain Dheb (high plateaus west of Algeria). The analyzed parameters are physiological from the leaves of young plants grown in a greenhouse stored in air-conditioned glass. Two types of salt stress are imposed on plants from the 165th day after sowing for a batch CaCl2 + NaCl to 300 meq and 600 meq.l-1and for the other batch to undiluted water sea with a frequency of watering every other two days. The results of water indicators such as the relative water content (RWC or TRE) showed some fluctuation during the five weeks under the two types of stress. Transpiration (water loss from the excised leaf or RWL) measured after 30, 60 and 120 min at the end of the period of application of stress presents a decline in both sources and types of stress. In addition, the stomatal resistance showed considerable variability for both sources and the type of stress.
Seismic Behavior Of Conxl Connections In Concrete Filled Steel Tube Columns (cft)
(University of Eloued جامعة الوادي, 2017-01-01) Seyfi Azar, A.; Moradi Shaghaghi, T.
Steel box-shaped columns are suitable structural members for structures with moment frames in two directions, but plate connections have several construction problems, including inaccessibility of inside of columns, welding difficulties, etc. ConXL connections are the new proposed details to reduce these problems. This connection consists of collar flange, collar corner, and collar web extension. In this paper, the seismic behavior of these types of connections is investigated using the numerical method. For this purpose, three samples of ConXL connections without concrete filler, with concrete filler and with concrete filler and stiffener plates inside the column were studied using Abaqus software. The results demonstrated that the ductility of the ConXL connection without concrete filler is more than the two other samples, while the strength of this connection is less than the strengths of the two other samples. It was observed that utilizing stiffener plate inside the column has no significant effect on the strength of the connection.
Contribution To The Study Of The Biodiversity Of Benthic Invertebrates And The Biological Quality Of Some Rivers In The Watershed Boumerzoug (east Of Algeria)
(University of Eloued جامعة الوادي, 2017-01-01) Bekhouche, N.; Marniche, F.; Ouldjaoui, A.
The composition of invertebrate communities colonizing the bottom of rivers, called for this reason benthic macro invertebrates, allows characterizing the biological quality of river water.This study focuses on benthic macrofauna of oued Boumerzoug and its two tributaries: Oued El Guareh and Oued Segus. Eleven (11) stations were prospecting object, between December 2014 and April 2015.The six sampling campaigns have identified a faunal population consisted of 7364 individuals, distributed in 106 taxa, with predominance of Diptera and the lack of sensitive polluo- elements (plécoptères). The results of analysis by method " IBGN " reveal poor hydro biological quality in the stations (G1, G2, G3, S1, S2, S3, S4, B1) and bad qualities for stations (B2, B3, B4).
The Knowledges Of Traditional Irrigation In The Oasis Of Kerzaz In Southwest Algerian: Legacy And Development
(University of Eloued جامعة الوادي, 2017-01-01) Rezzoug, C.; Remini, B.; Hamoudi, S.
In the valley of Saoura, the demand for water for irrigation has increased significantly and rapidly, it requires mobilization and rational and intensive use of all existing water sources like the groundwater which are the only source of drinking water supply and irrigation in the region and the protection of the large vein that feeds the Saoura and bearing his name "oued Saoura". Oasis Kerzaz is amongst the the most celebrated oasis and the biggest of valley of Saoura , it now suffers from several impediments to their development as: the scarcity of irrigation water, land abandonment, the silting up, the chunking and the exiguity of agricultural land, the food nature of agricultural activity and incurable diseases of crops.
Backstepping Control Of Three-phase Three-level Four-leg Shunt Active Power Filter
(University of Eloued جامعة الوادي, 2017-01-01) Badra, M. S.; Barkat, S.; Bouzidi, M.
In this paper, backstepping control for three-level four-leg shunt active power filter (SAPF) system is proposed. The adopted filtering topology requires both a three-dimensional space vector modulation (3DSVM) for controlling the three-level four-leg inverter as well as DC voltage and filter currents control. The regulation of the DC voltage and filter currents is accomplished by backstepping controllers. The voltage-balancing control of two split DC capacitors of the three-level four-leg SAPF is achieved using three-level three-dimensional space vector modulation equipped by a balancing strategy based on the effective use of the redundant switching states of the inverter voltage vectors. The simulation results show the effectiveness of the proposed filtering system in terms of the compensation of the harmonics and the zero sequence current and the operation at unity power factor.
Artificial Intelligence To Predict Inhibition Performance Of Pitting Corrosion
(University of Eloued جامعة الوادي, 2017-01-01) Boukhari, Y.; Boucherit, M. N.; Zaabat, M.; Amzert, S.; Brahimi, K.
This work aims to compare several algorithms for predicting the inhibition performance of localized corrosion. For this more than 400 electrochemical experiments were carried out in a corrosive solution containing an inorganic inhibitor. Pitting potential is used to indicate the performance of the inhibitor/oxidant mixture to prevent pitting corrosion. At the end of the electrochemical program a file containing all the experimental results has been prepared and submitted to several algorithms. Through a training phase each algorithm uses a set of experimental results to adjust its parameters and another set to predict the pitting potential starting from the properties and the chemical composition of the solution. The prediction performance of an algorithm is estimated by the difference between experimental pitting potential and the calculated one. The order of performance of the algorithms is: GA-ANN > LS-SVM > PSO-ANN > ANN >ANFIS > KNN > RT > KBP > LDA.

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