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Boukais</title> <meta name="description" content="Search results for: Meriem Boukais"> <meta name="keywords" content="Meriem Boukais"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Meriem Boukais"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 58</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Meriem Boukais</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">58</span> Modeling of Silicon Window Layers for Solar Cells Based SIGE</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Boukais">Meriem Boukais</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Dennai"> B. Dennai</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Ould-%20Abbas"> A. Ould- Abbas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The efficiency of SiGe solar cells might be improved by a wide-band-gap window layer. In this work we were simulated using the one dimensional simulation program called analysis of microelectronic and photonic structures (AMPS-1D). In the modeling, the thickness of silicon window was varied from 80 to 150 nm. The rest of layer’s thicknesses were kept constant, by varying thickness of window layer the simulated device performance was demonstrate in the form of current-voltage (I-V) characteristics and quantum efficiency (QE). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=modeling" title="modeling">modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=SiGe" title=" SiGe"> SiGe</a>, <a href="https://publications.waset.org/abstracts/search?q=AMPS-1D" title=" AMPS-1D"> AMPS-1D</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20efficiency" title=" quantum efficiency"> quantum efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=conversion" title=" conversion"> conversion</a>, <a href="https://publications.waset.org/abstracts/search?q=efficiency" title=" efficiency"> efficiency</a> </p> <a href="https://publications.waset.org/abstracts/27800/modeling-of-silicon-window-layers-for-solar-cells-based-sige" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27800.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">725</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">57</span> Simulation Of Silicon Window Layers For Solar Cells Based Sige </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Boukais%20Meriem">Boukais Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Dennai"> B. Dennai</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Ould-Abbas"> A. Ould-Abbas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The efficiency of SiGe solar cells might be improved by a wide-band-gap window layer. In this work we were simulated using the one dimensional simulation program called analysis of microelectronic and photonic structures (AMPS-1D). In the simulation, the thickness of silicon window was varied from 80 to 150 nm. The rest of layer’s thicknesses were kept constant, by varying thickness of window layer the simulated device performance was demonstrate in the form of current-voltage (I-V) characteristics and quantum efficiency (QE). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=SiGe" title="SiGe">SiGe</a>, <a href="https://publications.waset.org/abstracts/search?q=AMPS-1D" title=" AMPS-1D"> AMPS-1D</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=conversion" title=" conversion"> conversion</a>, <a href="https://publications.waset.org/abstracts/search?q=efficiency" title=" efficiency"> efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20efficiency" title=" quantum efficiency"> quantum efficiency</a> </p> <a href="https://publications.waset.org/abstracts/19153/simulation-of-silicon-window-layers-for-solar-cells-based-sige" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19153.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">806</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">56</span> Numerical Investigation of the Jacketing Method of Reinforced Concrete Column </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Boukais">S. Boukais</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Nekmouche"> A. Nekmouche</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Khelil"> N. Khelil</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Kezmane"> A. Kezmane</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The first intent of this study is to develop a finite element model that can predict correctly the behavior of the reinforced concrete column. Second aim is to use the finite element model to investigate and evaluate the effect of the strengthening method by jacketing of the reinforced concrete column, by considering different interface contact between the old and the new concrete. Four models were evaluated, one by considering perfect contact, the other three models by using friction coefficient of 0.1, 0.3 and 0.5. The simulation was carried out by using Abaqus software. The obtained results show that the jacketing reinforcement led to significant increase of the global performance of the behavior of the simulated reinforced concrete column. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=strengthening" title="strengthening">strengthening</a>, <a href="https://publications.waset.org/abstracts/search?q=jacketing" title=" jacketing"> jacketing</a>, <a href="https://publications.waset.org/abstracts/search?q=rienforced%20concrete%20column" title=" rienforced concrete column"> rienforced concrete column</a>, <a href="https://publications.waset.org/abstracts/search?q=Abaqus" title=" Abaqus"> Abaqus</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/118072/numerical-investigation-of-the-jacketing-method-of-reinforced-concrete-column" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/118072.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">146</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">55</span> Introduction of the Harmfulness of the Seismic Signal in the Assessment of the Performance of Reinforced Concrete Frame Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kahil%20Amar">Kahil Amar</a>, <a href="https://publications.waset.org/abstracts/search?q=Boukais%20Said"> Boukais Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Kezmane%20Ali"> Kezmane Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Hannachi%20Naceur%20Eddine"> Hannachi Naceur Eddine</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamizi%20Mohand"> Hamizi Mohand</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The principle of the seismic performance evaluation methods is to provide a measure of capability for a building or set of buildings to be damaged by an earthquake. The common objective of many of these methods is to supply classification criteria. The purpose of this study is to present a method for assessing the seismic performance of structures, based on Pushover method, we are particularly interested in reinforced concrete frame structures, which represent a significant percentage of damaged structures after a seismic event. The work is based on the characterization of seismic movement of the various earthquake zones in terms of PGA and PGD that is obtained by means of SIMQK_GR and PRISM software and the correlation between the points of performance and the scalar characterizing the earthquakes will be developed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=seismic%20performance" title="seismic performance">seismic performance</a>, <a href="https://publications.waset.org/abstracts/search?q=pushover%20method" title=" pushover method"> pushover method</a>, <a href="https://publications.waset.org/abstracts/search?q=characterization%20of%20seismic%20motion" title=" characterization of seismic motion"> characterization of seismic motion</a>, <a href="https://publications.waset.org/abstracts/search?q=harmfulness%20of%20the%20seismic" title=" harmfulness of the seismic"> harmfulness of the seismic</a> </p> <a href="https://publications.waset.org/abstracts/29929/introduction-of-the-harmfulness-of-the-seismic-signal-in-the-assessment-of-the-performance-of-reinforced-concrete-frame-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29929.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">383</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">54</span> Semi Empirical Equations for Peak Shear Strength of Rectangular Reinforced Concrete Walls</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Kezmane">Ali Kezmane</a>, <a href="https://publications.waset.org/abstracts/search?q=Said%20Boukais"> Said Boukais</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohand%20Hamizi"> Mohand Hamizi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents an analytical study on the behavior of reinforced concrete walls with rectangular cross section. Several experiments on such walls have been selected to be studied. Database from various experiments were collected and nominal shear wall strengths have been calculated using formulas, such as those of the ACI (American), NZS (New Zealand), Mexican (NTCC), and Wood and Barda equations. Subsequently, nominal shear wall strengths from the formulas were compared with the ultimate shear wall strengths from the database. These formulas vary substantially in functional form and do not account for all variables that affect the response of walls. There is substantial scatter in the predicted values of ultimate shear strength. Two new semi empirical equations are developed using data from tests of 57 walls for transitions walls and 27 for slender walls with the objective of improving the prediction of peak strength of walls with the most possible accurate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shear%20strength" title="shear strength">shear strength</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete%20walls" title=" reinforced concrete walls"> reinforced concrete walls</a>, <a href="https://publications.waset.org/abstracts/search?q=rectangular%20walls" title=" rectangular walls"> rectangular walls</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20walls" title=" shear walls"> shear walls</a>, <a href="https://publications.waset.org/abstracts/search?q=models" title=" models "> models </a> </p> <a href="https://publications.waset.org/abstracts/12121/semi-empirical-equations-for-peak-shear-strength-of-rectangular-reinforced-concrete-walls" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12121.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">344</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">53</span> Ultimate Strength Prediction of Shear Walls with an Aspect Ratio between One and Two</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Said%20Boukais">Said Boukais</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Kezmane"> Ali Kezmane</a>, <a href="https://publications.waset.org/abstracts/search?q=Kahil%20Amar"> Kahil Amar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohand%20Hamizi"> Mohand Hamizi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hannachi%20Neceur%20Eddine"> Hannachi Neceur Eddine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents an analytical study on the behavior of rectangular reinforced concrete walls with an aspect ratio between one and tow. Several experiments on such walls have been selected to be studied. Database from various experiments were collected and nominal wall strengths have been calculated using formulas, such as those of the ACI (American), NZS (New Zealand), Mexican (NTCC), and Wood equation for shear and strain compatibility analysis for flexure. Subsequently, nominal ultimate wall strengths from the formulas were compared with the ultimate wall strengths from the database. These formulas vary substantially in functional form and do not account for all variables that affect the response of walls. There is substantial scatter in the predicted values of ultimate strength. New semi empirical equation are developed using data from tests of 46 walls with the objective of improving the prediction of ultimate strength of walls with the most possible accuracy and for all failure modes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=prediction" title="prediction">prediction</a>, <a href="https://publications.waset.org/abstracts/search?q=ultimate%20strength" title=" ultimate strength"> ultimate strength</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete%20walls" title=" reinforced concrete walls"> reinforced concrete walls</a>, <a href="https://publications.waset.org/abstracts/search?q=walls" title=" walls"> walls</a>, <a href="https://publications.waset.org/abstracts/search?q=rectangular%20walls" title=" rectangular walls"> rectangular walls</a> </p> <a href="https://publications.waset.org/abstracts/29930/ultimate-strength-prediction-of-shear-walls-with-an-aspect-ratio-between-one-and-two" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29930.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">337</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">52</span> Thermal Processing of Zn-Bi Layered Double Hydroxide ZnO Doped Bismuth for a Photo-Catalytic Efficiency under Light Visible</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benyamina%20Imane">Benyamina Imane</a>, <a href="https://publications.waset.org/abstracts/search?q=Benalioua%20Bahia"> Benalioua Bahia</a>, <a href="https://publications.waset.org/abstracts/search?q=Mansour%20Meriem"> Mansour Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Bentouami%20Abdelhadi"> Bentouami Abdelhadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to use a synthetic route of the layered double hydroxide as a method of zinc oxide by doping a transition metal. The material is heat-treated at different temperatures then tested on the photo-fading of an acid dye indigo carmine under visible radiation compared with ZnO. The photo catalytic efficiency of Bi-ZnO in a visible light of 500 W was tested on photo-bleaching of an indigoid dye in comparison with the commercial ZnO. Indeed, a complete discoloration of indigo carmine solution of 16 mg / L was obtained after 40 and 120 minutes of irradiation in the presence of ZnO and ZnO-Bi respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=LDH" title="LDH">LDH</a>, <a href="https://publications.waset.org/abstracts/search?q=POA" title=" POA"> POA</a>, <a href="https://publications.waset.org/abstracts/search?q=photo-catalysis" title=" photo-catalysis"> photo-catalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=Bi-ZnO%20doping" title=" Bi-ZnO doping"> Bi-ZnO doping</a> </p> <a href="https://publications.waset.org/abstracts/33450/thermal-processing-of-zn-bi-layered-double-hydroxide-zno-doped-bismuth-for-a-photo-catalytic-efficiency-under-light-visible" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33450.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">453</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">51</span> Mechanical Contribution of Silica Fume and Hydrated Lime Addition in Mortars Assessed by Ultrasonic Pulse Velocity Tests </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nacim%20Khelil">Nacim Khelil</a>, <a href="https://publications.waset.org/abstracts/search?q=Amar%20Kahil"> Amar Kahil</a>, <a href="https://publications.waset.org/abstracts/search?q=Said%20Boukais"> Said Boukais</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the present study is to investigate the changes in the mechanical properties of mortars including additions of Condensed Silica Fume (CSF), Hydrated Lime (CH) or both at various amounts (5% to 15% of cement replacement) and high water ratios (w/b) (0.4 to 0.7). The physical and mechanical changes in the mixes were evaluated using non-destructive tests (Ultrasonic Pulse Velocity (UPV)) and destructive tests (crushing tests) on 28 day-long specimens consecutively, in order to assess CSF and CH replacement rate influence on the mechanical and physical properties of the mortars, as well as CSF-CH pre-mixing on the improvement of these properties. A significant improvement of the mechanical properties of the CSF, CSF-CH mortars, has been noted. CSF-CH mixes showed the best improvements exceeding 50% improvement, showing the sizable pozzolanic reaction contribution to the specimen strength development. UPV tests have shown increased velocities for CSF and CSH mixes, however no proportional evolution with compressive strengths could be noted. The results of the study show that CSF-CH addition could represent a suitable solution to significantly increase the mechanical properties of mortars. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength" title="compressive strength">compressive strength</a>, <a href="https://publications.waset.org/abstracts/search?q=condensed%20silica%20fume" title=" condensed silica fume"> condensed silica fume</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrated%20lime" title=" hydrated lime"> hydrated lime</a>, <a href="https://publications.waset.org/abstracts/search?q=pozzolanic%20reaction" title=" pozzolanic reaction"> pozzolanic reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=UPV%20testing" title=" UPV testing"> UPV testing</a> </p> <a href="https://publications.waset.org/abstracts/110109/mechanical-contribution-of-silica-fume-and-hydrated-lime-addition-in-mortars-assessed-by-ultrasonic-pulse-velocity-tests" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/110109.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">149</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">50</span> Chemical Composition and Antioxidant Properties of Daucus Gracilis Extracts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=El%20Kolli%20Meriem">El Kolli Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Laouer%20Hocine"> Laouer Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Sahli%20Farida"> Sahli Farida</a>, <a href="https://publications.waset.org/abstracts/search?q=Akkal%20Salah"> Akkal Salah</a>, <a href="https://publications.waset.org/abstracts/search?q=El%20Kolli%20Hayet"> El Kolli Hayet</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aerial parts of Daucus gracilis (Apiaceae) were subjected to hydrodistillation by a Clevenger apparatus to obtain the essential oil (EO) which has been analyzed by Gas Chromatography (GC) and GC coupled with mass spectrometry. The antioxidant properties of this EO and D. gracilis methanolic extract were studied by both of the free diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and the reducing power techniques. The dominant constituents of the EO were the elemicin (35.3 %) and the geranyl acetate (26.8 %). Both of EO and methanolic extract showed important antioxidant properties with respectively IC50 of 0,002 mg/ml and 0.06 mg/ml. They showed also a reducing power dose-dependent. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=daucus%20gracilis" title="daucus gracilis">daucus gracilis</a>, <a href="https://publications.waset.org/abstracts/search?q=apiaceae" title=" apiaceae"> apiaceae</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oil" title=" essential oil"> essential oil</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/27494/chemical-composition-and-antioxidant-properties-of-daucus-gracilis-extracts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27494.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">345</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">49</span> Solving Stochastic Eigenvalue Problem of Wick Type</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hassan%20Manouzi">Hassan Manouzi</a>, <a href="https://publications.waset.org/abstracts/search?q=Taous-Meriem%20Laleg-Kirati"> Taous-Meriem Laleg-Kirati</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper we study mathematically the eigenvalue problem for stochastic elliptic partial differential equation of Wick type. Using the Wick-product and the Wiener-Ito chaos expansion, the stochastic eigenvalue problem is reformulated as a system of an eigenvalue problem for a deterministic partial differential equation and elliptic partial differential equations by using the Fredholm alternative. To reduce the computational complexity of this system, we shall use a decomposition-coordination method. Once this approximation is performed, the statistics of the numerical solution can be easily evaluated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=eigenvalue%20problem" title="eigenvalue problem">eigenvalue problem</a>, <a href="https://publications.waset.org/abstracts/search?q=Wick%20product" title=" Wick product"> Wick product</a>, <a href="https://publications.waset.org/abstracts/search?q=SPDEs" title=" SPDEs"> SPDEs</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element" title=" finite element"> finite element</a>, <a href="https://publications.waset.org/abstracts/search?q=Wiener-Ito%20chaos%20expansion" title=" Wiener-Ito chaos expansion"> Wiener-Ito chaos expansion</a> </p> <a href="https://publications.waset.org/abstracts/7652/solving-stochastic-eigenvalue-problem-of-wick-type" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7652.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">359</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">48</span> Electrochemical Study of Copper–Tin Alloy Nucleation Mechanisms onto Different Substrates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Hamla">Meriem Hamla</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Benaicha"> Mohamed Benaicha</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabrine%20Derbal"> Sabrine Derbal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present work, several materials such as M/glass (M = Pt, Mo) were investigated to test their suitability for studying the early nucleation stages and growth of copper-tin clusters. It was found that most of these materials stand as good substrates to be used in the study of the nucleation and growth of electrodeposited Cu-Sn alloys from aqueous solution containing CuCl2, SnCl2 as electroactive species and Na3C6H5O7 as complexing agent. Among these substrates, Pt shows instantaneous models followed by 3D diffusion-limited growth. On the other hand, the electrodeposited copper-tin thin films onto Mo substrate followed progressive nucleation. The deposition mechanism of the Cu-Sn films has been studied using stationary electrochemical techniques (cyclic voltammetery (CV) and chronoamperometry (CA). The structural, morphological and compositional of characterization have been studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and EDAX techniques respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrodeposition" title="electrodeposition">electrodeposition</a>, <a href="https://publications.waset.org/abstracts/search?q=CuSn" title=" CuSn"> CuSn</a>, <a href="https://publications.waset.org/abstracts/search?q=nucleation" title=" nucleation"> nucleation</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanism" title=" mechanism"> mechanism</a> </p> <a href="https://publications.waset.org/abstracts/31480/electrochemical-study-of-copper-tin-alloy-nucleation-mechanisms-onto-different-substrates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31480.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">398</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">47</span> Software Defect Analysis- Eclipse Dataset</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amrane%20Meriem">Amrane Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Oukid%20Salyha"> Oukid Salyha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The presence of defects or bugs in software can lead to costly setbacks, operational inefficiencies, and compromised user experiences. The integration of Machine Learning(ML) techniques has emerged to predict and preemptively address software defects. ML represents a proactive strategy aimed at identifying potential anomalies, errors, or vulnerabilities within code before they manifest as operational issues. By analyzing historical data, such as code changes, feature im- plementations, and defect occurrences. This en- ables development teams to anticipate and mitigate these issues, thus enhancing software quality, reducing maintenance costs, and ensuring smoother user interactions. In this work, we used a recommendation system to improve the performance of ML models in terms of predicting the code severity and effort estimation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=software%20engineering" title="software engineering">software engineering</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title=" machine learning"> machine learning</a>, <a href="https://publications.waset.org/abstracts/search?q=bugs%20detection" title=" bugs detection"> bugs detection</a>, <a href="https://publications.waset.org/abstracts/search?q=effort%20estimation" title=" effort estimation"> effort estimation</a> </p> <a href="https://publications.waset.org/abstracts/172928/software-defect-analysis-eclipse-dataset" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172928.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">87</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">46</span> A Nonlinear Approach for System Identification of a Li-Ion Battery Based on a Non-Linear Autoregressive Exogenous Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Mossaddek">Meriem Mossaddek</a>, <a href="https://publications.waset.org/abstracts/search?q=El%20Mehdi%20Laadissi"> El Mehdi Laadissi</a>, <a href="https://publications.waset.org/abstracts/search?q=El%20Mehdi%20Loualid"> El Mehdi Loualid</a>, <a href="https://publications.waset.org/abstracts/search?q=Chouaib%20Ennawaoui"> Chouaib Ennawaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Sohaib%20Bouzaid"> Sohaib Bouzaid</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelowahed%20Hajjaji"> Abdelowahed Hajjaji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An electrochemical system is a subset of mechatronic systems that includes a wide variety of batteries and nickel-cadmium, lead-acid batteries, and lithium-ion. Those structures have several non-linear behaviors and uncertainties in their running range. This paper studies an effective technique for modeling Lithium-Ion (Li-Ion) batteries using a Nonlinear Auto-Regressive model with exogenous input (NARX). The Artificial Neural Network (ANN) is trained to employ the data collected from the battery testing process. The proposed model is implemented on a Li-Ion battery cell. Simulation of this model in MATLAB shows good accuracy of the proposed model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lithium-ion%20battery" title="lithium-ion battery">lithium-ion battery</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20network" title=" neural network"> neural network</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20storage" title=" energy storage"> energy storage</a>, <a href="https://publications.waset.org/abstracts/search?q=battery%20model" title=" battery model"> battery model</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20models" title=" nonlinear models"> nonlinear models</a> </p> <a href="https://publications.waset.org/abstracts/159992/a-nonlinear-approach-for-system-identification-of-a-li-ion-battery-based-on-a-non-linear-autoregressive-exogenous-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159992.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">117</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">45</span> Influence of Dairy Cows Food on Uncooked Pressed Dough Cheese "Edam" Quality</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nougha%20Meriem">Nougha Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Sadouki%20Mohammed"> Sadouki Mohammed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cheese quality is an important manufacturing requirement. It deals with traceability, from the dairy cows feed to the storage location. In this study, we have seen the impact of distributing two different types of green feed (purple clover VS alfalfa), in a ration composed of oat hay, silage of corn and concentrated feed, in equal quantities, on resulting milk destined for an Edam manufacturing. It reveals that alfalfa allows a high production of milk, comparatively to purple clover. However, this latter allows a high quality of milk, in point of view physico-chemical properties, especially regarding proteins and fat yields, two essential factors affecting Edam quality. The obtained results indicated that milk allowed by purple clover shows a best physico-chemical quality beside alfalfa, for it use in Edam manufacturing according to the values recommended by standardized dairies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dairy%20cows" title="dairy cows">dairy cows</a>, <a href="https://publications.waset.org/abstracts/search?q=Edam" title=" Edam"> Edam</a>, <a href="https://publications.waset.org/abstracts/search?q=food" title=" food"> food</a>, <a href="https://publications.waset.org/abstracts/search?q=quality" title=" quality"> quality</a> </p> <a href="https://publications.waset.org/abstracts/23158/influence-of-dairy-cows-food-on-uncooked-pressed-dough-cheese-edam-quality" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23158.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">321</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">44</span> In Silico Study of the Biological and Pharmacological Activity of Nigella sativa</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ammar%20Ouahab">Ammar Ouahab</a>, <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Houichi"> Meriem Houichi </a>, <a href="https://publications.waset.org/abstracts/search?q=Sanna%20Mihoubi"> Sanna Mihoubi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Nigella sativa is an annual flowering plant, belongs to the Ranunculaceae family. It has many pharmacological activities such as anti-inflammatory; anti-bacterial; anti-hepatotoxic activities etc. Materials: In order to predict the pharmacological activity of Nigella Sativa’s compounds, some web based servers were used, namely, PubChem, Molinspiration, ADMET-SAR, PASS online and PharMapper. In addition to that, AutoDOCK was used to investigate the different molecular interactions between the selected compounds and their target proteins. Results: All compounds displayed a stable interaction with their targets and satisfactory binding energies, which means that they are active on their targets. Conclusion: Nigella sativa is an effective medicinal plant that has several ethno-medical uses; the latter uses are proven herein via an in-silico study of their pharmacological activities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nigella%20sativa" title="Nigella sativa">Nigella sativa</a>, <a href="https://publications.waset.org/abstracts/search?q=AutoDOCK" title=" AutoDOCK"> AutoDOCK</a>, <a href="https://publications.waset.org/abstracts/search?q=PubChem" title=" PubChem"> PubChem</a>, <a href="https://publications.waset.org/abstracts/search?q=Molinspiration" title=" Molinspiration"> Molinspiration</a>, <a href="https://publications.waset.org/abstracts/search?q=ADMET-SAR" title=" ADMET-SAR"> ADMET-SAR</a>, <a href="https://publications.waset.org/abstracts/search?q=PharMapper" title=" PharMapper"> PharMapper</a>, <a href="https://publications.waset.org/abstracts/search?q=PASS%20online%20server" title=" PASS online server"> PASS online server</a>, <a href="https://publications.waset.org/abstracts/search?q=docking" title=" docking"> docking</a> </p> <a href="https://publications.waset.org/abstracts/108503/in-silico-study-of-the-biological-and-pharmacological-activity-of-nigella-sativa" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108503.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">136</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">43</span> Study of the in vivo and in vitro Antioxidant Activity of the Methanol Extract from the Roots of the Barks of Zizyphus lotus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Djemai%20Zoughlache%20Soumia">Djemai Zoughlache Soumia</a>, <a href="https://publications.waset.org/abstracts/search?q=Yahia%20Mouloud"> Yahia Mouloud</a>, <a href="https://publications.waset.org/abstracts/search?q=Lekbir%20Adel"> Lekbir Adel</a>, <a href="https://publications.waset.org/abstracts/search?q=Meslem%20Meriem"> Meslem Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Maouchi%20Madiha"> Maouchi Madiha</a>, <a href="https://publications.waset.org/abstracts/search?q=Bahi%20Ahlem"> Bahi Ahlem</a>, <a href="https://publications.waset.org/abstracts/search?q=Benbia%20Souhila"> Benbia Souhila</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Natural extracts is known for their contents of biologically active molecules. In this context, we attempted to evaluate the antioxidant activity of the methanolic extract prepared from the bark of the roots of Zizyphus lotus. The quantitative analysis based on the dosage, phenolic compounds, flavonoids and tannins provided following values: 0.39 ± 0.007 ug EAG/mg of extract for phenolic compounds, 0.05 ± 0.02ug EQ/mg extract for flavonoids and 0.0025 ± 7.071 E-4 ECT ug/mg extract for tannins. The study of the antioxidant activity by the DPPH test in vitro showed a powerful antiradical power with an IC50 = 8,8 ug/ml. For the DPPH test in vivo we used two rats lots, one lot with a dose of 200 mg/kg of the methanol extract and a control lot. We found a significant difference in antiradical activity with p < 0.05. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zizyphus%20lotus" title="Zizyphus lotus">Zizyphus lotus</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=DPPH" title=" DPPH"> DPPH</a>, <a href="https://publications.waset.org/abstracts/search?q=phenolic%20compounds" title=" phenolic compounds"> phenolic compounds</a>, <a href="https://publications.waset.org/abstracts/search?q=flavonoids" title=" flavonoids"> flavonoids</a>, <a href="https://publications.waset.org/abstracts/search?q=tannins" title=" tannins"> tannins</a> </p> <a href="https://publications.waset.org/abstracts/5758/study-of-the-in-vivo-and-in-vitro-antioxidant-activity-of-the-methanol-extract-from-the-roots-of-the-barks-of-zizyphus-lotus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5758.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">509</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">42</span> Effect of Methylammonium Lead Iodide Layer Thickness on Performance of Perovskite Solar Cell</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chadel%20Meriem">Chadel Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Bensmaine%20Souhila"> Bensmaine Souhila</a>, <a href="https://publications.waset.org/abstracts/search?q=Chadel%20Asma"> Chadel Asma</a>, <a href="https://publications.waset.org/abstracts/search?q=Bouchikhi%20Chaima"> Bouchikhi Chaima</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Methylammonium Lead Iodide CH3NH3PbI3 is used in solar cell as an absorber layer since 2009. The efficiencies of these technologies have increased from 3.8% in 2009 to 29.15% in 2019. So, these technologies Methylammonium Lead Iodide is promising for the development of high-performance photovoltaic applications. Due to the high cost of the experimental of the solar cells, researchers have turned to other methods like numerical simulation. In this work, we evaluate and simulate the performance of a CH₃NH₃PbI₃ lead-based perovskite solar cell when the amount of materials of absorber layer is reduced. We show that the reducing of thickness the absorber layer influent on performance of the solar cell. For this study, the one-dimensional simulation program, SCAPS-1D, is used to investigate and analyze the performance of the perovskite solar cell. After optimization, maximum conversion efficiency was achieved with 300 nm in absorber layer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=methylammonium%20lead%20Iodide" title="methylammonium lead Iodide">methylammonium lead Iodide</a>, <a href="https://publications.waset.org/abstracts/search?q=perovskite%20solar%20cell" title=" perovskite solar cell"> perovskite solar cell</a>, <a href="https://publications.waset.org/abstracts/search?q=caracteristic%20J-V" title=" caracteristic J-V"> caracteristic J-V</a>, <a href="https://publications.waset.org/abstracts/search?q=effeciency" title=" effeciency"> effeciency</a> </p> <a href="https://publications.waset.org/abstracts/176389/effect-of-methylammonium-lead-iodide-layer-thickness-on-performance-of-perovskite-solar-cell" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/176389.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">72</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">41</span> Preparation of Gold Nanoparticles Stabilized in Acid-Activated Montmorillonite for Nitrophenol Reduction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Ammari">Fatima Ammari</a>, <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Chenouf"> Meriem Chenouf</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Synthesis of gold nanoparticles (AuNPs) has attracted much attention since the pioneering discovery of the high catalytic activity of supported gold nanoparticles in the reaction of CO oxidation at low temperature. In this research field, we used montmorillonite pre-acidified under gentle conditions for AuNPs stabilization; using different loading percentage 1, 2 and 5%. The gold nanoparticles were obtained using chemical reduction method using NaBH4 as reductant agent. The obtained gold nanoparticles stabilized in acid-activated montmorillonite were used as catalysts for reduction of 4-nitrophenol to aminophenol with sodium borohydride at room temperature The UV-Vis results confirm directly the gold nanaoparticles formation. The XRD N2 adsorption and MET results showed the formation of gold nanoparticles in the pores of preacidified montmorillonite with an average size of 5.7nm. The reduction reaction of 4-nitrophenol into 4-aminophenol with NaBH4 catalyzed by Au°-montmorillonite catalyst exhibits remarkably a high activity; the reaction was completed within 4.5min. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gold" title="gold">gold</a>, <a href="https://publications.waset.org/abstracts/search?q=acid-activated%20montmorillonite" title=" acid-activated montmorillonite"> acid-activated montmorillonite</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoparticles" title=" nanoparticles"> nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=4-nitrophenol" title=" 4-nitrophenol"> 4-nitrophenol</a> </p> <a href="https://publications.waset.org/abstracts/36556/preparation-of-gold-nanoparticles-stabilized-in-acid-activated-montmorillonite-for-nitrophenol-reduction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36556.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">389</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">40</span> Thermal Transformation of Zn-Bi Double Hydroxide Lamellar in ZnO Doped with Bismuth in Application for Photo Catalysis under Visible Light</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benyamina%20Imane">Benyamina Imane</a>, <a href="https://publications.waset.org/abstracts/search?q=Benalioua%20Bahia"> Benalioua Bahia</a>, <a href="https://publications.waset.org/abstracts/search?q=Mansour%20Meriem"> Mansour Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Bentouami%20Abdelhadi"> Bentouami Abdelhadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to use a synthetic route of the layered double hydroxide as a method of zinc oxide by doping a transition metal. The material is heat-treated at different temperatures then tested on the photo-fading of acid dye indigo carmine under visible radiation compared with ZnO. The material having a better efficacy was characterized by XRD and thereafter SEM. The result of XRD untreated Bi-Zn-LDH material thermally revealed peaks characteristic lamellar materials. Indeed, the lamellar morphology is very visible, observed by scanning electron microscopy (SEM). Furthermore, the lamellar character partially disappears when the material is treated at 550 °C in a muffle furnace. Thus obtained, a zinc oxide doped with bismuth confirmed by XRD. The photocatalytic efficiency of Bi-ZnO in a visible light of 500 W at 114,6 µw/cm2 as maximum of irradiance was tested on photo-bleaching of an indigoid dye in comparison with the commercial ZnO. Indeed, a complete discoloration of indigo carmine solution of 16 mg / L was obtained after 40 and 120 minutes of irradiation in the presence of Bi-ZnO and ZnO respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photocatalysis" title="photocatalysis">photocatalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=Bi-ZnO-LDH" title=" Bi-ZnO-LDH"> Bi-ZnO-LDH</a>, <a href="https://publications.waset.org/abstracts/search?q=doping" title=" doping"> doping</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO" title=" ZnO"> ZnO</a> </p> <a href="https://publications.waset.org/abstracts/54903/thermal-transformation-of-zn-bi-double-hydroxide-lamellar-in-zno-doped-with-bismuth-in-application-for-photo-catalysis-under-visible-light" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54903.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">507</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">39</span> Continuous Dyeing of Graphene and Polyaniline on Textiles for Electromagnetic Interference Shielding: An Application of Intelligent Fabrics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mourad%20%20Makhlouf">Mourad Makhlouf</a>, <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Boutamine"> Meriem Boutamine</a>, <a href="https://publications.waset.org/abstracts/search?q=Hachemi%20Hichem"> Hachemi Hichem</a>, <a href="https://publications.waset.org/abstracts/search?q=Zoubir%20Benmaamar"> Zoubir Benmaamar</a>, <a href="https://publications.waset.org/abstracts/search?q=Didier%20Villemin"> Didier Villemin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study explores the use of intelligent textiles for electromagnetic shielding through the continuous dyeing of graphene and polyaniline onto cotton fabric. Graphene was obtained by recycling graphite from spent batteries, and polyaniline was obtained in situ using H2O2. Graphene and polyaniline were bottom-modified on the fiber surface to improve adhesion and achieve a uniform distribution. This study evaluated the effect of the specific gravity percentage on sheet performance and active shielding against electromagnetic interference (EMI). Results showed that the dyed fabrics of graphene, polyaniline, and graphene/polyaniline demonstrated higher conductivity and EMI SE values of 9 to 16 dB in the 8 to 9 GHz range of the X-band, with potential applications in electromagnetic shielding. The use of intelligent textiles offers a sustainable and effective approach to achieving EMI shielding, with the added benefits of recycling waste materials and improving the properties of cotton fabrics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=%27ntelligent%20textiles" title="'ntelligent textiles">'ntelligent textiles</a>, <a href="https://publications.waset.org/abstracts/search?q=graphene" title=" graphene"> graphene</a>, <a href="https://publications.waset.org/abstracts/search?q=polyaniline" title=" polyaniline"> polyaniline</a>, <a href="https://publications.waset.org/abstracts/search?q=electromagnetic%20shielding" title=" electromagnetic shielding"> electromagnetic shielding</a>, <a href="https://publications.waset.org/abstracts/search?q=conductivity" title=" conductivity"> conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=recycling." title=" recycling."> recycling.</a> </p> <a href="https://publications.waset.org/abstracts/190791/continuous-dyeing-of-graphene-and-polyaniline-on-textiles-for-electromagnetic-interference-shielding-an-application-of-intelligent-fabrics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/190791.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">45</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">38</span> Study of the Chemical Composition of Rye, Millet and Sorghum from Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soualem%20Mami%20Zoubida">Soualem Mami Zoubida</a>, <a href="https://publications.waset.org/abstracts/search?q=Brixi%20Nassima"> Brixi Nassima</a>, <a href="https://publications.waset.org/abstracts/search?q=Beghdad%20Choukri"> Beghdad Choukri</a>, <a href="https://publications.waset.org/abstracts/search?q=Belarbi%20Meriem"> Belarbi Meriem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cereals are the most important source of dietary fiber in the Nordic diet. The fiber in cereals is located mainly in the outer layers of the kernel; particularly in the bran. Improved diet can help unlock the door to good health. Whole grains are an important source of nutrients that are in short supply in our diet, including digestible carbohydrates, dietary fiber, trace minerals, and other compounds of interest in disease prevention, including phytoestrogens and antioxidants (1). The objective of this study is to know the composition of whole grain cereals (rye, millet, white, and red sorghum) which a majority pushes in the south of Algeria. This shows that the millet has a high rate of the sugar estimated at 67.6%. The high proportion of proteins has been found in the two varieties of sorghum and rye. The millet presents the great percentage in lipids compared with the others cereals. And at the last, a red sorghum has the highest rate of fiber(2). These nutrients, as well as other components of whole grain cereals, have, in terms of health, an increased effect if they are consumed together. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chemical%20composition" title="chemical composition">chemical composition</a>, <a href="https://publications.waset.org/abstracts/search?q=miller" title=" miller"> miller</a>, <a href="https://publications.waset.org/abstracts/search?q=Secale%20cereal" title=" Secale cereal"> Secale cereal</a>, <a href="https://publications.waset.org/abstracts/search?q=Sorghum%20bicolor" title=" Sorghum bicolor"> Sorghum bicolor</a> </p> <a href="https://publications.waset.org/abstracts/30756/study-of-the-chemical-composition-of-rye-millet-and-sorghum-from-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30756.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">415</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">37</span> First Principle Calculations of the Structural and Optoelectronic Properties of Cubic Perovskite CsSrF3</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Harmel">Meriem Harmel</a>, <a href="https://publications.waset.org/abstracts/search?q=Houari%20Khachai"> Houari Khachai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We have investigated the structural, electronic and optical properties of a compound perovskite CsSrF3 using the full-potential linearized augmented plane wave (FP-LAPW) method within density functional theory (DFT). In this approach, both the local density approximation (LDA) and the generalized gradient approximation (GGA) were used for exchange-correlation potential calculation. The ground state properties such as lattice parameter, bulk modulus and its pressure derivative were calculated and the results are compared whit experimental and theoretical data. Electronic and bonding properties are discussed from the calculations of band structure, density of states and electron charge density, where the fundamental energy gap is direct under ambient conditions. The contribution of the different bands was analyzed from the total and partial density of states curves. The optical properties (namely: the real and the imaginary parts of the dielectric function ε(ω), the refractive index n(ω) and the extinction coefficient k(ω)) were calculated for radiation up to 35.0 eV. This is the first quantitative theoretical prediction of the optical properties for the investigated compound and still awaits experimental confirmations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DFT" title="DFT">DFT</a>, <a href="https://publications.waset.org/abstracts/search?q=fluoroperovskite" title=" fluoroperovskite"> fluoroperovskite</a>, <a href="https://publications.waset.org/abstracts/search?q=electronic%20structure" title=" electronic structure"> electronic structure</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20properties" title=" optical properties"> optical properties</a> </p> <a href="https://publications.waset.org/abstracts/31764/first-principle-calculations-of-the-structural-and-optoelectronic-properties-of-cubic-perovskite-cssrf3" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31764.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">480</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">36</span> Study of Mechanical Behavior of Unidirectional Composite Laminates According</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Deliou%20Adel">Deliou Adel</a>, <a href="https://publications.waset.org/abstracts/search?q=Saadalah%20Younes"> Saadalah Younes</a>, <a href="https://publications.waset.org/abstracts/search?q=Belkaid%20Khmissi"> Belkaid Khmissi</a>, <a href="https://publications.waset.org/abstracts/search?q=Dehbi%20Meriem"> Dehbi Meriem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Composite materials, in the most common sense of the term, are a set of synthetic materials designed and used mainly for structural applications; the mechanical function is dominant. The mechanical behaviors of the composite, as well as the degradation mechanisms leading to its rupture, depend on the nature of the constituents and on the architecture of the fiber preform. The profile is required because it guides the engineer in designing structures with precise properties in relation to the needs. This work is about studying the mechanical behavior of unidirectional composite laminates according to different failure criteria. Varying strength parameter values make it possible to compare the ultimate mechanical characteristics obtained by the criteria of Tsai-Hill, Fisher and maximum stress. The laminate is subjected to uniaxial tensile membrane forces. Estimates of their ultimate strengths and the plotting of the failure envelope constitute the principal axis of this study. Using the theory of maximum stress, we can determine the various modes of damage of the composite. The different components of the deformation are presented for different orientations of fibers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=unidirectional%20kevlar%2Fepoxy%20composite" title="unidirectional kevlar/epoxy composite">unidirectional kevlar/epoxy composite</a>, <a href="https://publications.waset.org/abstracts/search?q=failure%20criterion" title=" failure criterion"> failure criterion</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20stress" title=" membrane stress"> membrane stress</a>, <a href="https://publications.waset.org/abstracts/search?q=deformations" title=" deformations"> deformations</a>, <a href="https://publications.waset.org/abstracts/search?q=failure%20envelope" title=" failure envelope"> failure envelope</a> </p> <a href="https://publications.waset.org/abstracts/176684/study-of-mechanical-behavior-of-unidirectional-composite-laminates-according" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/176684.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">89</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">35</span> Optimization of Adsorption Performance of Lignocellulosic Waste Pretreatment and Chemical Modification</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bendjelloul%20Meriem">Bendjelloul Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Elandaloussi%20El%20Hadj"> Elandaloussi El Hadj </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, we studied the effectiveness of a lignocellulosic waste (wood sawdust) for the removal of cadmium Cd (II) in aqueous solution. The adsorbent material SBO-CH2-CO2Na has been prepared by alkaline pretreatment of wood sawdust followed by a chemical modification with sodium salt of chloroacetic acid. The characterization of the as-prepared material by FTIR has proven that the grafting of acetate spacer took actually place in the lignocellulosic backbone by the appearance of characteristic band of carboxylic groups in the IR spectrum. The removal study of Cd2+ by SBO-CH2-CO2Na material at the solid-liquid interface was carried out by kinetics, sorption isotherms, effect of temperature and thermodynamic parameters were evaluated. The last part of this work was dedicated to assess the regenerability of the adsorbent material after three reuse cycles. The results indicate that SBO-CH2-CO2Na matrix possesses a high effectiveness in removing Cd (II) with an adsorption capacity of 222.22 mg/g, yet a better value that those of many low-cost adsorbents so far reported in the literature. The results found in the course of this study suggest that ionic exchange is the most appropriate mechanism involved in the removal of cadmium ions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorption" title="adsorption">adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=cadmium" title=" cadmium"> cadmium</a>, <a href="https://publications.waset.org/abstracts/search?q=isotherms" title=" isotherms"> isotherms</a>, <a href="https://publications.waset.org/abstracts/search?q=lignocellulosic" title=" lignocellulosic"> lignocellulosic</a>, <a href="https://publications.waset.org/abstracts/search?q=regenerability" title=" regenerability "> regenerability </a> </p> <a href="https://publications.waset.org/abstracts/23220/optimization-of-adsorption-performance-of-lignocellulosic-waste-pretreatment-and-chemical-modification" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23220.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">333</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">34</span> Synthesis of Gold Nanoparticles Stabilized in Na-Montmorillonite for Nitrophenol Reduction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Ammari">Fatima Ammari</a>, <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Chenouf"> Meriem Chenouf</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Synthesis of gold nano particles has attracted much attention since the pioneering discovery of the high catalytic activity of supported gold nano particles in the reaction of CO oxidation at low temperature. In this research field, we used Na-montmorillonite for gold nanoparticles stabilization; different loading percentage 1, 2 and 5%. The gold nano particles were obtained using chemical reduction method using NaBH4 as reductant agent. The obtained gold nano particles Au-mont stabilized in Na-montmorillonite were used as catalysts for reduction of 4-nitrophenol to aminophenol with sodium borohydride at room temperature. The UV-Vis results confirm directly the gold nano particles formation. The XRD and N2 adsorption results showed the formation of gold nano particles in the pores of montmorillonite with an average size of 5 nm obtained on samples with 2%Au-mont. The gold particles size increased with the increase of gold loading percentage. The reduction reaction of 4-nitrophenol into 4-aminophenol with NaBH4 catalyzed by Au-Na-montmorillonite catalyst exhibits remarkably a high activity; the reaction was completed within 9 min for 1Au-mont and within 3 min for 2Au-mont. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chemical%20reduction" title="chemical reduction">chemical reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=gold" title=" gold"> gold</a>, <a href="https://publications.waset.org/abstracts/search?q=montmorillonite" title=" montmorillonite"> montmorillonite</a>, <a href="https://publications.waset.org/abstracts/search?q=nano%20particles" title=" nano particles"> nano particles</a>, <a href="https://publications.waset.org/abstracts/search?q=4-nitrophenol" title=" 4-nitrophenol"> 4-nitrophenol</a> </p> <a href="https://publications.waset.org/abstracts/34827/synthesis-of-gold-nanoparticles-stabilized-in-na-montmorillonite-for-nitrophenol-reduction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34827.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">330</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">33</span> Dye Retention by a Photochemicaly Crosslinked Poly(2-Hydroxy-Ethyl-Meth-Acrylic) Network in Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Houda%20Bendahma">Yasmina Houda Bendahma</a>, <a href="https://publications.waset.org/abstracts/search?q=Tewfik%20Bouchaour"> Tewfik Bouchaour</a>, <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Merad"> Meriem Merad</a>, <a href="https://publications.waset.org/abstracts/search?q=Ulrich%20Maschke"> Ulrich Maschke</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this work is to study retention of dye dissolved in distilled water, by an hydrophilic acrylic polymer network. The polymer network considered is Poly (2-hydroxyethyl methacrylate) (PHEMA): it is prepared by photo-polymerization under UV irradiation in the presence of a monomer (HEMA), initiator and an agent cross-linker. PHEMA polymer network obtained can be used in the retention of dye molecules present in the wastewater. The results obtained are interesting in the study of the kinetics of swelling and de-swelling of cross linked polymer networks PHEMA in colored aqueous solutions. The dyes used for retention by the PHEMA networks are eosin Y and Malachite Green, dissolved in distilled water. Theoretical conformational study by a simplified molecular model of system cross linked PHEMA / dye (eosin Y and Malachite Green), is used to simulate the retention phenomenon (or Docking) dye molecules in cavities in nano-domains included in the PHEMA polymer network. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dye%20retention" title="dye retention">dye retention</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20modeling" title=" molecular modeling"> molecular modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=photochemically%20crosslinked%20polymer%20network" title=" photochemically crosslinked polymer network"> photochemically crosslinked polymer network</a>, <a href="https://publications.waset.org/abstracts/search?q=swelling%20deswelling" title=" swelling deswelling"> swelling deswelling</a>, <a href="https://publications.waset.org/abstracts/search?q=PHEMA" title=" PHEMA"> PHEMA</a>, <a href="https://publications.waset.org/abstracts/search?q=HEMA" title=" HEMA"> HEMA</a> </p> <a href="https://publications.waset.org/abstracts/33085/dye-retention-by-a-photochemicaly-crosslinked-poly2-hydroxy-ethyl-meth-acrylic-network-in-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33085.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">366</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">32</span> Impact of Coccidia on Mortality and Weight Growth in Japanese Quail Coturnix japonica (Aves, Phasianidae) in Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amina%20Smai">Amina Smai</a>, <a href="https://publications.waset.org/abstracts/search?q=Fairouz%20Haddadj"> Fairouz Haddadj</a>, <a href="https://publications.waset.org/abstracts/search?q=Habiba%20Saadi-Idouhar"> Habiba Saadi-Idouhar</a>, <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Aissi"> Meriem Aissi</a>, <a href="https://publications.waset.org/abstracts/search?q=Safia%20Zenia"> Safia Zenia</a>, <a href="https://publications.waset.org/abstracts/search?q=Salaheddine%20Doumandji"> Salaheddine Doumandji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Coccidiosis is a very common intestinal parasitic disease caused by a worldwide distributed protozoan of the genus Eimeria. This disease is very common in young birds beyond the second week of life, especially in land-based breeding. The study was carried out in a hunting center of Zeralda located in the north-east of Algiers. The objective of our work is to study the evolution of coccidiosis in quails from 1 to 35 days old by collecting their droppings daily. These are analyzed in the laboratory using the flotation method and the Mac Master one to count coccidia. Weight changes are taken into account as well as mortality in parallel with certain zootechnical parameters such as density. The species of coccidia recovered is Eimeria coturnicis. The results showed that there is an average evolution of mortality of individuals with a rate of 13.33% due to the presence of coccidia with a significant regression (p=0.031). The weight of the quails increases with the age of the animal with a rapid growth rate from the 3rd week onwards. Indeed, the statistical analysis reveals that the evolution of the number did not affect the evolution of the weight (p=0.70) and the GMQ (R=0.52). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coccidiosis" title="coccidiosis">coccidiosis</a>, <a href="https://publications.waset.org/abstracts/search?q=Coturnix%20japonica" title=" Coturnix japonica"> Coturnix japonica</a>, <a href="https://publications.waset.org/abstracts/search?q=daily%20average%20gain" title=" daily average gain"> daily average gain</a>, <a href="https://publications.waset.org/abstracts/search?q=weight" title=" weight"> weight</a> </p> <a href="https://publications.waset.org/abstracts/101063/impact-of-coccidia-on-mortality-and-weight-growth-in-japanese-quail-coturnix-japonica-aves-phasianidae-in-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/101063.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">183</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">31</span> Antioxidant Activity of Essential Oils and Ethanolic Extracts of Four Medicinal Plants Alone and in Combination</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatiha%20Bedjou">Fatiha Bedjou</a>, <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Meddas"> Meriem Meddas</a>, <a href="https://publications.waset.org/abstracts/search?q=Tadjajikt%20Chekkal"> Tadjajikt Chekkal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present work aims to evaluate the antioxidant activity of ethanolic extracts and essential oils of aromatic plants of the Lamiaceae family: Thymus algeriensis and Salvia rosmarinus, and Anacardiaceae: Pistacia lentiscus, Myrtaceae: Eucalyptus polybracetea. The polyphenols were measured using the Folin-Ciocalteu method; the results showed that the essential oils studied as well as the ethanolic extracts are relatively rich in polyphenols. Their antioxidant properties were tested by the synthetic DPPH radical trapping method. The IC50 values were determined according to the graph representing the percentage of inhibition of the DPPH radical by essential oils and by ethanolic extracts, according to our results there is a correlation between the level of polyphenols present in the different essential oils and different ethanolic extracts and their ability to neutralize free radicals. Several combinations were carried out between the essential oils and also between the ethanolic extracts in order to determine the type of interactions existing between the combined substances, the results were represented in the form of isobolograms. Additive and super-additive effects were observed in combinations of essential oils, and super-additive and sub-additive effects were observed for combinations of ethanolic extracts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=essential%20oils" title="essential oils">essential oils</a>, <a href="https://publications.waset.org/abstracts/search?q=ethanolic%20extracts" title=" ethanolic extracts"> ethanolic extracts</a>, <a href="https://publications.waset.org/abstracts/search?q=DPPH" title=" DPPH"> DPPH</a>, <a href="https://publications.waset.org/abstracts/search?q=combination" title=" combination"> combination</a> </p> <a href="https://publications.waset.org/abstracts/173670/antioxidant-activity-of-essential-oils-and-ethanolic-extracts-of-four-medicinal-plants-alone-and-in-combination" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/173670.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">61</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">30</span> The Mechanism of Antimicrobial Activity and Antioxidant Effects of the Essential Oil and the Methanolic Extract of Carum montanum (Coss. et Dur.) Benth. Et Hook. Aerial Parts from Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meriem%20El%20Kolli">Meriem El Kolli</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Laouer"> Hocine Laouer</a>, <a href="https://publications.waset.org/abstracts/search?q=Hayet%20El%20Kolli"> Hayet El Kolli</a>, <a href="https://publications.waset.org/abstracts/search?q=Salah%20Akkal"> Salah Akkal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The methanolic extract (ME) of C. montanum obtained by a hydo-alcoholic maceration and its polyphenol content was evaluated by Folin-Ciocalteu method. This extract and C. montanum essential oil were screened for antimicrobial activity against 21 microbial strains by agar diffusion method. MICs of the EO were determined by the broth micro dilution method. The mechanism of action of the EO was determined on the susceptible strains by the time kill assay and the lysis experience. Antioxidant properties were studied by both free DPPH radical scavenging and reducing power techniques. The TPC in the ME showed a high level of 101.50 ± 5.33 mg GAE /mg. B. cereus was the most sensitive strain with MIC of 55.5 µg/ml , then K. pneumoniae (111 µg/ml). A remarkable decrease in a survival rate as well as in the absorbance at 260 nm were recorded, which suggest that the cytoplasm membrane is one of the targets of the EO. Antioxidant effects were concentration dependent and IC50 values were 1.09 ± 0.37 µg/ml for the EO and 65.04 ± 0.00 µg/ml for the ME by DPPH method and a reducing power dose-dependent. In conclusion, C. montanum extracts showed potent which could be exploited in the food industry for food preservation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20montanum" title="C. montanum">C. montanum</a>, <a href="https://publications.waset.org/abstracts/search?q=Apiaceae" title=" Apiaceae"> Apiaceae</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oils" title=" essential oils"> essential oils</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=reducing%20power" title=" reducing power"> reducing power</a> </p> <a href="https://publications.waset.org/abstracts/41814/the-mechanism-of-antimicrobial-activity-and-antioxidant-effects-of-the-essential-oil-and-the-methanolic-extract-of-carum-montanum-coss-et-dur-benth-et-hook-aerial-parts-from-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41814.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">237</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">29</span> Malachite Green and Red Congo Dyes Adsorption onto Chemical Treated Sewage Sludge</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zamouche%20Meriem">Zamouche Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehcene%20Ismahan"> Mehcene Ismahan</a>, <a href="https://publications.waset.org/abstracts/search?q=Temmine%20Manel"> Temmine Manel</a>, <a href="https://publications.waset.org/abstracts/search?q=Bencheikh%20Lehocine%20Mosaab"> Bencheikh Lehocine Mosaab</a>, <a href="https://publications.waset.org/abstracts/search?q=Meniai%20Abdeslam%20Hassen"> Meniai Abdeslam Hassen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the adsorption of Malachite Green (MG) by chemical treated sewage sludge has been studied. The sewage sludge, collected from drying beds of the municipal wastewater treatment station of IBN ZIED, Constantine, Algeria, was treated by different acids such us HNO₃, H₂SO₄, H₃PO₄ for modifying its aptitude to removal the MG from aqueous solutions. The results obtained shows that the sewage sludge activated by sulfuric acid give the highest elimination amounts of MG (9.52 mg/L) compared by the other acids used. The effects of operation parameters have been investigated, the results obtained show that the adsorption capacity per unit of adsorbent mass decreases from 18.69 to 1.20 mg/g when the mass of the adsorbent increases from 0.25 to 4 g respectively, the optimum mass for which a maximum of elimination of the dye is equal to 0.5g. The increasing in the temperature of the solution results in a slight decrease in the adsorption capacity of the chemically treated sludge. The highest amount of dye adsorbed by CSSS (9.56 mg/g) was observed for the optimum temperature of 25°C. The chemical activated sewage sludge proved its effectiveness for the removal of the Red Congo (RC), but by comparison the adsorption of the two dyes studies, we noted that the sludge has more affinity to adsorb the (MG). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorption" title="adsorption">adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20activation" title=" chemical activation"> chemical activation</a>, <a href="https://publications.waset.org/abstracts/search?q=malachite%20green" title=" malachite green"> malachite green</a>, <a href="https://publications.waset.org/abstracts/search?q=sewage%20sludge" title=" sewage sludge"> sewage sludge</a> </p> <a href="https://publications.waset.org/abstracts/94506/malachite-green-and-red-congo-dyes-adsorption-onto-chemical-treated-sewage-sludge" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/94506.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">193</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Meriem%20Boukais&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Meriem%20Boukais&page=2" rel="next">&rsaquo;</a></li> </ul> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a 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