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Ouldelhadj</title> <meta name="description" content="Search results for: Mohamed Didi Ouldelhadj"> <meta name="keywords" content="Mohamed Didi Ouldelhadj"> <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 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action="https://publications.waset.org/abstracts/search"> <div 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="Mohamed Didi Ouldelhadj"> <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> 1619</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Mohamed Didi Ouldelhadj</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1619</span> Optimization of Extraction Conditions for Phenolic Compounds from Deverra Scoparia Coss and Dur</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roukia%20Hammoudi">Roukia Hammoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Chabrouk%20Farid"> Chabrouk Farid</a>, <a href="https://publications.waset.org/abstracts/search?q=Dehak%20Karima"> Dehak Karima</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahfoud%20Hadj%20Mahammed"> Mahfoud Hadj Mahammed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Didi%20Ouldelhadj"> Mohamed Didi Ouldelhadj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study was to optimise the extraction conditions for phenolic compounds from Deverra scoparia Coss and Dur. Apiaceae plant by ultrasound assisted extraction (UAE). The effects of solvent type (acetone, ethanol and methanol), solvent concentration (%), extraction time (mins) and extraction temperature (°C) on total phenolic content (TPC) were determined. The optimum extraction conditions were found to be acetone concentration of 80%, extraction time of 25 min and extraction temperature of 25°C. Under the optimized conditions, the value for TPC was 9.68 ± 1.05 mg GAE/g of extract. The study of the antioxidant power of these oils was performed by the method of DPPH. The results showed that antioxidant activity of the Deverra scoparia essential oil was more effective as compared to ascorbic acid and trolox. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Deverra%20scoparia" title="Deverra scoparia">Deverra scoparia</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=ultrasound%20assisted%20extraction" title=" ultrasound assisted extraction"> ultrasound assisted extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20phenolic%20content" title=" total phenolic content"> total phenolic content</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/23755/optimization-of-extraction-conditions-for-phenolic-compounds-from-deverra-scoparia-coss-and-dur" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23755.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">603</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">1618</span> Optimization of Extraction Conditions for Phenolic Compounds from Deverra scoparia Coss. and Dur</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roukia%20Hammoudi">Roukia Hammoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Dehak%20Karima"> Dehak Karima</a>, <a href="https://publications.waset.org/abstracts/search?q=Chabrouk%20Farid"> Chabrouk Farid</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahfoud%20Hadj%20Mahammed"> Mahfoud Hadj Mahammed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Didi%20Ouldelhadj"> Mohamed Didi Ouldelhadj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study was to optimise the extraction conditions for phenolic compounds from Deverra scoparia Coss and Dur. Apiaceae plant by ultrasound assisted extraction (UAE). The effects of solvent type (Acetone, Ethanol and methanol), solvent concentration (%), extraction time (mins) and extraction temperature (°C) on total phenolic content (TPC) were determined. the optimum extraction conditions were found to be acetone concentration of 80%, extraction time of 25 min and extraction temperature of 25°C. Under the optimized conditions, the value for TPC was 9.68 ± 1.05 mg GAE/g of extract. The study of the antioxidant power of these oils was performed by the method of DPPH. The results showed that antioxidant activity of the Deverra scoparia essential oil was more effective as compared to ascorbic acid and trolox. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Deverra%20scoparia" title="Deverra scoparia">Deverra scoparia</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=ultrasound%20assisted%20extraction" title=" ultrasound assisted extraction"> ultrasound assisted extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20phenolic%20content" title=" total phenolic content"> total phenolic content</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/25874/optimization-of-extraction-conditions-for-phenolic-compounds-from-deverra-scoparia-coss-and-dur" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25874.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">595</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">1617</span> Liquid-Liquid Extraction of Uranium (VI) from Aqueous Solution Using 1-Hydroxyalkylidene-1,1-Diphosphonic Acids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mustapha%20Bouhoun%20Ali">Mustapha Bouhoun Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Yacine%20Badjah%20Hadj%20Ahmed"> Ahmed Yacine Badjah Hadj Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mouloud%20Attou"> Mouloud Attou</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdel%20Hamid%20Elias"> Abdel Hamid Elias</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Amine%20Didi"> Mohamed Amine Didi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The extraction of uranium(VI) from aqueous solutions has been investigated using 1-hydroxyhexadecylidene-1,1-diphosphonic acid (HHDPA) and 1-hydroxydodecylidene-1,1-diphosphonic acid (HDDPA), which were synthesized and characterized by elemental analysis and by FT-IR, 1H NMR, 31P NMR spectroscopy. In this paper, we propose a tentative assignment for the shifts of those two ligands and their specific complexes with uranium(VI). We carried out the extraction of uranium(VI) by HHDPA and HDDPA from [carbon tetrachloride + 2-octanol (v/v: 90%/10%)] solutions. Various factors such as contact time, pH, organic/aqueous phase ratio and extractant concentration were considered. The optimum conditions obtained were: contact time = 20 min, organic/aqueous phase ratio = 1, pH value = 3.0 and extractant concentration = 0.3M. The extraction yields are more significant in the case of the HHDPA which is equipped with a hydrocarbon chain, longer than that of the HDDPA. Logarithmic plots of the uranium(VI) distribution ratio vs. pHeq and the extractant concentration showed that the ratio of extractant to extracted uranium(VI) (ligand/metal) is 2:1. The formula of the complex of uranium(VI) with the HHDPA and the DHDPA is UO2(H3L)2 (HHDPA and DHDPA are denoted as H4L). A spectroscopic analysis has showed that coordination of uranium(VI) takes place via oxygen atoms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=liquid-liquid%20extraction" title="liquid-liquid extraction">liquid-liquid extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=uranium%28VI%29" title=" uranium(VI)"> uranium(VI)</a>, <a href="https://publications.waset.org/abstracts/search?q=1-hydroxyalkylidene-1" title=" 1-hydroxyalkylidene-1"> 1-hydroxyalkylidene-1</a>, <a href="https://publications.waset.org/abstracts/search?q=1-diphosphonic%20acids" title="1-diphosphonic acids">1-diphosphonic acids</a>, <a href="https://publications.waset.org/abstracts/search?q=HHDPA" title=" HHDPA"> HHDPA</a>, <a href="https://publications.waset.org/abstracts/search?q=HDDPA" title=" HDDPA"> HDDPA</a>, <a href="https://publications.waset.org/abstracts/search?q=aqueous%20solution" title=" aqueous solution"> aqueous solution</a> </p> <a href="https://publications.waset.org/abstracts/18650/liquid-liquid-extraction-of-uranium-vi-from-aqueous-solution-using-1-hydroxyalkylidene-11-diphosphonic-acids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18650.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">528</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">1616</span> Application of Liquid Emulsion Membrane Technique for the Removal of Cadmium(II) from Aqueous Solutions Using Aliquat 336 as a Carrier</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Medjahed">B. Medjahed</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Didi"> M. A. Didi</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Guezzen"> B. Guezzen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present work, emulsion liquid membrane (ELM) technique was applied for the extraction of cadmium(II) present in aqueous samples. Aliquat 336 (Chloride tri-N-octylmethylammonium) was used as carrier to extract cadmium(II). The main objective of this work is to investigate the influence of various parameters affected the ELM formation and its stability and testing the performance of the prepared ELM on removal of cadmium by using synthetic solution with different concentrations. Experiments were conducted to optimize pH of the feed solution and it was found that cadmium(II) can be extracted at pH 6.5. The influence of the carrier concentration and treat ratio on the extraction process was investigated. The obtained results showed that the optimal values are respectively 3% (Aliquat 336) and a ratio (feed: emulsion) equal to 1:1. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cadmium" title="cadmium">cadmium</a>, <a href="https://publications.waset.org/abstracts/search?q=carrier" title=" carrier"> carrier</a>, <a href="https://publications.waset.org/abstracts/search?q=emulsion%20liquid%20membrane" title=" emulsion liquid membrane"> emulsion liquid membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=surfactant" title=" surfactant"> surfactant</a> </p> <a href="https://publications.waset.org/abstracts/57343/application-of-liquid-emulsion-membrane-technique-for-the-removal-of-cadmiumii-from-aqueous-solutions-using-aliquat-336-as-a-carrier" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57343.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">406</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">1615</span> Sudan’s Approach to Knowledge Management in Disaster Management</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Abdalla%20Elamein%20Boshara">Mohamed Abdalla Elamein Boshara</a>, <a href="https://publications.waset.org/abstracts/search?q=Peter%20Charles%20Woods"> Peter Charles Woods</a>, <a href="https://publications.waset.org/abstracts/search?q=Nour%20Eldin%20Mohamed%20Elshaiekh"> Nour Eldin Mohamed Elshaiekh </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Knowledge Management has become very important for Disaster Management response and planning. This paper proposes the implementation of a Knowledge Management System with a sustainable data collection mechanism for reliable and timely information management to support decision makers in making the right decisions in the timely manner. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=knowledge%20management" title="knowledge management">knowledge management</a>, <a href="https://publications.waset.org/abstracts/search?q=disaster%20management" title=" disaster management"> disaster management</a>, <a href="https://publications.waset.org/abstracts/search?q=incident%20tracking" title=" incident tracking"> incident tracking</a>, <a href="https://publications.waset.org/abstracts/search?q=web%20application" title=" web application"> web application</a> </p> <a href="https://publications.waset.org/abstracts/18077/sudans-approach-to-knowledge-management-in-disaster-management" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18077.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">780</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">1614</span> Examination of Occupational Health and Safety Practices in Ghana</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zakari%20Mustapha">Zakari Mustapha</a>, <a href="https://publications.waset.org/abstracts/search?q=Clinto%20Aigbavboa"> Clinto Aigbavboa</a>, <a href="https://publications.waset.org/abstracts/search?q=Wellinton%20Didi%20Thwala"> Wellinton Didi Thwala</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Occupational Health and Safety (OHS) issues has been a major challenge to the Ghanaian government. The purpose of the study was to examine OHS practices in Ghana. The study looked at various views from different scholars about OHS practices in order to achieve the objective of the study. Literature review was conducted on OHS in Ghana. Findings from the study shows Ministry of Roads and Transport (MRT) and Ministry of Water Resources, Works and Housing (MWRWH) are two government ministries in charge of construction and implementation of the construction sector policy. The Factories, Offices and Shops Act 1970, Act 328 and the Mining Regulations 1970 LI 665 are the two major edicts. The study presents a strong background on OHS practices in Ghana and contribute to the body of knowledge on the solution to the current trends and challenges of OHS in the construction sector. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ILO%20convention" title="ILO convention">ILO convention</a>, <a href="https://publications.waset.org/abstracts/search?q=OHS%20challenges" title=" OHS challenges"> OHS challenges</a>, <a href="https://publications.waset.org/abstracts/search?q=OHS%20practices" title=" OHS practices"> OHS practices</a>, <a href="https://publications.waset.org/abstracts/search?q=OHS%20improvement" title=" OHS improvement"> OHS improvement</a> </p> <a href="https://publications.waset.org/abstracts/51507/examination-of-occupational-health-and-safety-practices-in-ghana" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51507.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">367</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">1613</span> Isolation and Molecular Identification of Two Fungal Strains Capable of Degrading hydrocarbon Contaminants on Saudi Arabian Environment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amr%20A.%20EL%20Hanafy">Amr A. EL Hanafy</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasir%20Anwar"> Yasir Anwar</a>, <a href="https://publications.waset.org/abstracts/search?q=Saleh%20A.%20Mohamed"> Saleh A. Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Saleh%20Mohamed%20Saleh%20Al-Garni"> Saleh Mohamed Saleh Al-Garni</a>, <a href="https://publications.waset.org/abstracts/search?q=Jamal%20S.%20M.%20Sabir"> Jamal S. M. Sabir </a>, <a href="https://publications.waset.org/abstracts/search?q=Osama%20A.%20H.%20Abu%20Zinadah"> Osama A. H. Abu Zinadah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Morsi%20Ahmed"> Mohamed Morsi Ahmed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the vicinity of the red sea about 15 fungi species were isolated from oil contaminated sites. On the basis of aptitude to degrade the crude oil and DCPIP assay, two fungal isolates were selected amongst 15 oil degrading strains. Analysis of ITS-1, ITS-2 and amplicon pyrosequencing studies of fungal diversity revealed that these strains belong to Penicillium and Aspergillus species. Two strains that proved to be the most efficient in degrading crude oil was Aspergillus niger (54 %) and Penicillium commune (48 %) Subsequent to two weeks of cultivation in BHS medium the degradation rate were recorded by using spectrophotometer and GC-MS. Hence, it is cleared that these fungal strains has the capability of degradation and can be utilized for cleaning the Saudi Arabian environment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fungal%20%20strains" title="fungal strains">fungal strains</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrocarbon%20contaminants" title=" hydrocarbon contaminants"> hydrocarbon contaminants</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20identification" title=" molecular identification"> molecular identification</a>, <a href="https://publications.waset.org/abstracts/search?q=biodegradation" title=" biodegradation"> biodegradation</a>, <a href="https://publications.waset.org/abstracts/search?q=GC-MS" title=" GC-MS"> GC-MS</a> </p> <a href="https://publications.waset.org/abstracts/36036/isolation-and-molecular-identification-of-two-fungal-strains-capable-of-degrading-hydrocarbon-contaminants-on-saudi-arabian-environment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36036.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">522</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">1612</span> Experimental Study on Friction Factor of Oscillating Flow Through a Regenerator</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Sa%C3%AFd%20Kahaleras">Mohamed Saïd Kahaleras</a>, <a href="https://publications.waset.org/abstracts/search?q=Fran%C3%A7ois%20Lanzetta"> François Lanzetta</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Khan"> Mohamed Khan</a>, <a href="https://publications.waset.org/abstracts/search?q=Guillaume%20Layes"> Guillaume Layes</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Nika"> Philippe Nika</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents an experimental work to characterize the dynamic operation of a metal regenerator crossed by dry compressible air alternating flow. Unsteady dynamic measurements concern the pressure, velocity and temperature of the gas at the ends and inside the channels of the regenerator. The regenerators are tested under isothermal conditions and thermal axial temperature gradient. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=friction%20factor" title="friction factor">friction factor</a>, <a href="https://publications.waset.org/abstracts/search?q=oscillating%20flow" title=" oscillating flow"> oscillating flow</a>, <a href="https://publications.waset.org/abstracts/search?q=regenerator" title=" regenerator"> regenerator</a>, <a href="https://publications.waset.org/abstracts/search?q=stirling%20machine" title=" stirling machine"> stirling machine</a> </p> <a href="https://publications.waset.org/abstracts/2336/experimental-study-on-friction-factor-of-oscillating-flow-through-a-regenerator" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2336.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">508</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">1611</span> Optimization Study of Adsorption of Nickel(II) on Bentonite </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Medjahed">B. Medjahed</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Didi"> M. A. Didi</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Guezzen"> B. Guezzen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work concerns with the experimental study of the adsorption of the Ni(II) on bentonite. The effects of various parameters such as contact time, stirring rate, initial concentration of Ni(II), masse of clay, initial pH of aqueous solution and temperature on the adsorption yield, were carried out. The study of the effect of the ionic strength on the yield of adsorption was examined by the identification and the quantification of the present chemical species in the aqueous phase containing the metallic ion Ni(II). The adsorbed species were investigated by a calculation program using CHEAQS V. L20.1 in order to determine the relation between the percentages of the adsorbed species and the adsorption yield. The optimization process was carried out using 2<sup>3</sup> factorial designs. The individual and combined effects of three process parameters, i.e. initial Ni(II) concentration in aqueous solution (2.10<sup>−3</sup> and 5.10<sup>−3</sup> mol/L), initial pH of the solution (2 and 6.5), and mass of bentonite (0.03 and 0.3 g) on Ni(II) adsorption, were studied. <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=bentonite" title=" bentonite"> bentonite</a>, <a href="https://publications.waset.org/abstracts/search?q=factorial%20design" title=" factorial design"> factorial design</a>, <a href="https://publications.waset.org/abstracts/search?q=Nickel%28II%29" title=" Nickel(II)"> Nickel(II)</a> </p> <a href="https://publications.waset.org/abstracts/74678/optimization-study-of-adsorption-of-nickelii-on-bentonite" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74678.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">159</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">1610</span> Effects of Flexible Flat Feet on Electromyographic Activity of Erector Spinae and Multifidus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdallah%20Mohamed%20Kamel%20Mohamed%20Ali">Abdallah Mohamed Kamel Mohamed Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Samah%20Saad%20Zahran"> Samah Saad Zahran</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Hamed%20Rashad"> Mohamed Hamed Rashad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Flexible flatfoot (FFF) has been considered as a risk factor for several lower limb injuries and mechanical low back pain. This was attributed to the dysfunction of the lumbopelvic-hip complex musculature. Objective: To investigate the influence of FFF on electromyographic activities of erector spinae and multifidus. Methods: A cross-section study was held between an FFF group (20 subjects) and a normal foot group (20 subjects). A surface electromyography was used to assess the electromyographic activity of erector spinae and multifidus. Group differences were assessed by the T-test. Results: There was a significant increase in EMG activities of erector spinae and multifidus in the FFF group compared with the normal group. Conclusion: There is an increase in EMG activities in erector spinae and multifidus in FFF subjects compared with normal subjects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electromyography" title="electromyography">electromyography</a>, <a href="https://publications.waset.org/abstracts/search?q=flatfoot" title=" flatfoot"> flatfoot</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20back%20pain" title=" low back pain"> low back pain</a>, <a href="https://publications.waset.org/abstracts/search?q=paraspinal%20muscles" title=" paraspinal muscles"> paraspinal muscles</a> </p> <a href="https://publications.waset.org/abstracts/120916/effects-of-flexible-flat-feet-on-electromyographic-activity-of-erector-spinae-and-multifidus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/120916.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">214</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">1609</span> “Polytic Iconography”: The Sky and Pants of Nicolas-Antoine Taunay (1755-1830)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B%C3%A1rbara%20Dantas">Bárbara Dantas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nicolas-Antoine Taunay had everything to have a quiet life with his numerous family, his colleagues from the Paris Academy of Art, and as a renowned painter of the French Court, but the conjuncture was quite complicated in those final years of the eighteenth century and first decades of the 19th century. The painter had to adapt to various political and social ruptures: from royalty to the French Revolution, from the empire of Napoleon Bonaparte to the empire of King John VI. According to the method of analysis that involves the idea of "political iconography" from Carlo Ginzburg and the concept of "representation" associated with Georges Didi-Huberman, this work wishes to insert Taunay in its context through the analysis of his portrait made by a colleague of the profession and of a Brazilian landscape painted of his own (1816-1821) and, in which he represented himself. Finally, the intention is to find in these two paintings how Nicolas-Antoine Taunay faced himself and in the middle that surrounded him in the traffic that was forced to make it between Paris and Rio de Janeiro. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nicolas-Antoine%20Taunay" title="Nicolas-Antoine Taunay">Nicolas-Antoine Taunay</a>, <a href="https://publications.waset.org/abstracts/search?q=politic%20iconography" title=" politic iconography"> politic iconography</a>, <a href="https://publications.waset.org/abstracts/search?q=French%20art" title=" French art"> French art</a>, <a href="https://publications.waset.org/abstracts/search?q=Brazilian%20art" title=" Brazilian art"> Brazilian art</a>, <a href="https://publications.waset.org/abstracts/search?q=19th%20century" title=" 19th century"> 19th century</a> </p> <a href="https://publications.waset.org/abstracts/149733/polytic-iconography-the-sky-and-pants-of-nicolas-antoine-taunay-1755-1830" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149733.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">94</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">1608</span> Sorption of Congo Red from Aqueous Solution by Surfactant-Modified Bentonite: Kinetic and Factorial Design Study </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Guezzen">B. Guezzen</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Didi"> M. A. Didi</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Medjahed"> B. Medjahed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An organoclay (HDTMA-B) was prepared from sodium bentonite (Na-B). The starting material was modified using the hexadecyltrimethylammonium ion (HDTMA<sup>+</sup>) in the amounts corresponding to 100 % of the CEC value. Batch experiments were carried out in order to model and optimize the sorption of Congo red dye from aqueous solution. The pseudo-first order and pseudo-second order kinetic models have been developed to predict the rate constant and the sorption capacity at equilibrium with the effect of temperature, the solid/solution ratio and the initial dye concentration. The equilibrium time was reached within 60 min. At room temperature (20 °C), optimum dye sorption of 49.4 mg/g (98.9%) was achieved at pH 6.6, sorbent dosage of 1g/L and initial dye concentration of 50 mg/L, using surfactant modified bentonite. The optimization of adsorption parameters mentioned above on dye removal was carried out using Box-Behnken design. The sorption parameters were analyzed statistically by means of variance analysis by using the Statgraphics Centurion XVI software. <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=dye" title=" dye"> dye</a>, <a href="https://publications.waset.org/abstracts/search?q=factorial%20design" title=" factorial design"> factorial design</a>, <a href="https://publications.waset.org/abstracts/search?q=kinetic" title=" kinetic"> kinetic</a>, <a href="https://publications.waset.org/abstracts/search?q=organo-bentonite" title=" organo-bentonite"> organo-bentonite</a> </p> <a href="https://publications.waset.org/abstracts/74711/sorption-of-congo-red-from-aqueous-solution-by-surfactant-modified-bentonite-kinetic-and-factorial-design-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74711.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">198</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">1607</span> Static Relaxation of Glass Fiber Reinforced Pipes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20Y.%20Abdellah">Mohammed Y. Abdellah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20K.%20Hassan"> Mohamed K. Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20F.%20Mohamed"> A. F. Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Shadi%20M.%20Munshi"> Shadi M. Munshi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Hashem"> A. M. Hashem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Pips made from glass fiber reinforced polymer has competitive role in petroleum industry. The need of evaluating the mechanical behavior of (GRP) pipes is essential objects. Stress relaxation illustrates how polymers relieve stress under constant strain. Static relaxation test is carried out at room temperature. The material gives poor static relaxation strength, two loading cycles have been observed for the tested specimen. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GRP" title="GRP">GRP</a>, <a href="https://publications.waset.org/abstracts/search?q=sandwich%20composite%20material" title=" sandwich composite material"> sandwich composite material</a>, <a href="https://publications.waset.org/abstracts/search?q=static%20relaxation" title=" static relaxation"> static relaxation</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20relief" title=" stress relief"> stress relief</a> </p> <a href="https://publications.waset.org/abstracts/23225/static-relaxation-of-glass-fiber-reinforced-pipes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23225.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">625</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">1606</span> The Solvent Extraction of Uranium, Plutonium and Thorium from Aqueous Solution by 1-Hydroxyhexadecylidene-1,1-Diphosphonic Acid </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Bouhoun%20Ali">M. Bouhoun Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Y.%20Badjah%20Hadj%20Ahmed"> A. Y. Badjah Hadj Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Attou"> M. Attou</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Elias"> A. Elias</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Didi"> M. A. Didi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the solvent extraction of uranium(VI), plutonium(IV) and thorium(IV) from aqueous solutions using 1-hydroxyhexadecylidene-1,1-diphosphonic acid (HHDPA) in treated kerosene has been investigated. The HHDPA was previously synthesized and characterized by FT-IR, 1H NMR, 31P NMR spectroscopy and elemental analysis. The effects contact time, initial pH, initial metal concentration, aqueous/organic phase ratio, extractant concentration and temperature on the extraction process have been studied. An empirical modelling was performed by using a 25 full factorial design, and regression equation for extraction metals was determined from the data. The conventional log-log analysis of the extraction data reveals that ratios of extractant to extracted U(VI), Pu(IV) and Th(IV) are 1:1, 1:2 and 1:2, respectively. Thermodynamic parameters showed that the extraction process was exothermic heat and spontaneous. The obtained optimal parameters were applied to real efﬂuents containing uranium(VI), plutonium(IV) and thorium(IV) ions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=solvent%20extraction" title="solvent extraction">solvent extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=uranium" title=" uranium"> uranium</a>, <a href="https://publications.waset.org/abstracts/search?q=plutonium" title=" plutonium"> plutonium</a>, <a href="https://publications.waset.org/abstracts/search?q=thorium" title=" thorium"> thorium</a>, <a href="https://publications.waset.org/abstracts/search?q=1-hydroxyhexadecylidene-1-1-diphosphonic%20acid" title=" 1-hydroxyhexadecylidene-1-1-diphosphonic acid"> 1-hydroxyhexadecylidene-1-1-diphosphonic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=aqueous%20solution" title=" aqueous solution"> aqueous solution</a> </p> <a href="https://publications.waset.org/abstracts/37851/the-solvent-extraction-of-uranium-plutonium-and-thorium-from-aqueous-solution-by-1-hydroxyhexadecylidene-11-diphosphonic-acid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37851.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">288</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">1605</span> Study on the Effect of Coupling Fluid Compressible-Deformable Wall on the Flow of Molten Polymers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Driouich">Mohamed Driouich</a>, <a href="https://publications.waset.org/abstracts/search?q=Kamal%20Gueraoui"> Kamal Gueraoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Sammouda"> Mohamed Sammouda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main objective of this work is to establish a numerical code for studying the flow of molten polymers in deformable pipes. Using an iterative numerical method based on finite differences, we determine the profiles of the fluid velocity, the temperature and the apparent viscosity of the fluid. The numerical code presented can also be applied to other industrial applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=numerical%20code" title="numerical code">numerical code</a>, <a href="https://publications.waset.org/abstracts/search?q=molten%20polymers" title=" molten polymers"> molten polymers</a>, <a href="https://publications.waset.org/abstracts/search?q=deformable%20pipes" title=" deformable pipes"> deformable pipes</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20differences" title=" finite differences"> finite differences</a> </p> <a href="https://publications.waset.org/abstracts/8493/study-on-the-effect-of-coupling-fluid-compressible-deformable-wall-on-the-flow-of-molten-polymers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8493.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">574</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">1604</span> Optimization of Process Parameters using Response Surface Methodology for the Removal of Zinc(II) by Solvent Extraction </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Guezzen">B. Guezzen</a>, <a href="https://publications.waset.org/abstracts/search?q=M.A.%20Didi"> M.A. Didi</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Medjahed"> B. Medjahed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A factorial design of experiments and a response surface methodology were implemented to investigate the liquid-liquid extraction process of zinc (II) from acetate medium using the 1-Butyl-imidazolium di(2-ethylhexyl) phosphate [BIm<sup>+</sup>][D2EHP<sup>-</sup>]. The optimization process of extraction parameters such as the initial pH effect (2.5, 4.5, and 6.6), ionic liquid concentration (1, 5.5, and 10 mM) and salt effect (0.01, 5, and 10 mM) was carried out using a three-level full factorial design (3<sup>3</sup>). The results of the factorial design demonstrate that all these factors are statistically significant, including the square effects of pH and ionic liquid concentration. The results showed that the order of significance: IL concentration > salt effect > initial pH. Analysis of variance (ANOVA) showing high coefficient of determination (R<sup>2</sup> = 0.91) and low probability values (P < 0.05) signifies the validity of the predicted second-order quadratic model for Zn (II) extraction. The optimum conditions for the extraction of zinc (II) at the constant temperature (20 °C), initial Zn (II) concentration (1mM) and A/O ratio of unity were: initial pH (4.8), extractant concentration (9.9 mM), and NaCl concentration (8.2 mM). At the optimized condition, the metal ion could be quantitatively extracted. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ionic%20liquid" title="ionic liquid">ionic liquid</a>, <a href="https://publications.waset.org/abstracts/search?q=response%20surface%20methodology" title=" response surface methodology"> response surface methodology</a>, <a href="https://publications.waset.org/abstracts/search?q=solvent%20extraction" title=" solvent extraction"> solvent extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20acetate" title=" zinc acetate"> zinc acetate</a> </p> <a href="https://publications.waset.org/abstracts/57289/optimization-of-process-parameters-using-response-surface-methodology-for-the-removal-of-zincii-by-solvent-extraction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57289.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">374</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">1603</span> Characterization of Coronary Artery Obstruction and Related Findings in Ischemic Heart Patients Using Cardiac Scintigraphy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yousif%20Mohamed%20Y.%20Abdallah">Yousif Mohamed Y. Abdallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Eltayeb%20Wagi%20Allah%20Eltayeb"> Eltayeb Wagi Allah Eltayeb</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20E.%20Gar-elnabi"> Mohamed E. Gar-elnabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Ahmed%20Ali"> Mohamed Ahmed Ali </a> </p> <p class="card-text"><strong>Abstract:</strong></p> To characterize coronary artery obstruction and related findings in ischemic heart patients using cardiac scintigraphy for the identification of myocardial ischemia, 146 patients were studied at basal conditions and also asked for fasting after night till the intravenous injection of the radiopharmaceutical. After the injection time about 15 to 20 minutes, the patient should eat a fatty meal and chocolate for the good excretion of the gall bladder, to evaluate the performance and regional wall motion of the left ventricle (LV). The results showed that the body mass index percentage in this sample was in range of 43.05 to 61.05. The number of patients who were catheter candidates were 56 with 43% and the patients that were not candidate to cathode were 74 patients with 57% of all patients. For the group of patients where type of ischemia was assessed, 29.5% of patients had reversible posterior and inferior wall, 15.1% of patients had fixed large from apex to base, 9.6% of patients had mild basal inferior wall, 4.8 % of patients had mild anterior wall, 6.2% of patients had antro-septal and 34.9% of patients had moderate ischemia. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=myocardial%20ischemia" title="myocardial ischemia">myocardial ischemia</a>, <a href="https://publications.waset.org/abstracts/search?q=myocardial%20scintigraphy" title=" myocardial scintigraphy"> myocardial scintigraphy</a>, <a href="https://publications.waset.org/abstracts/search?q=contrast%20ventriculography" title=" contrast ventriculography"> contrast ventriculography</a>, <a href="https://publications.waset.org/abstracts/search?q=coronary%20artery%20obstruction" title=" coronary artery obstruction"> coronary artery obstruction</a> </p> <a href="https://publications.waset.org/abstracts/13957/characterization-of-coronary-artery-obstruction-and-related-findings-in-ischemic-heart-patients-using-cardiac-scintigraphy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13957.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">585</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">1602</span> Effect of Papaverine on Neurospheres</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Noura%20Shehab-Eldeen">Noura Shehab-Eldeen</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Elsherbeeny"> Mohamed Elsherbeeny</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossam%20Elmetwally"> Hossam Elmetwally</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Salama"> Mohamed Salama</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Lotfy"> Ahmed Lotfy</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Elgamal"> Mohamed Elgamal</a>, <a href="https://publications.waset.org/abstracts/search?q=Hussein%20Sheashaa"> Hussein Sheashaa</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Sobh"> Mohamed Sobh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mitochondrial toxins including papaverine may be implicated in the etiology and pathogenesis of Parkinson's disease. The aim was to detect the effect of papaverine on the proliferation and viability of neural stem cells. Rat neural progenitor cells were isolated from embryos (E14) brains. The dispersed tissues were allowed to settle, then, The supernatant was centrifuged at 1,000 g for 5 min. The pellet was placed in Hank’s solution cultured as free-floating neurospheres Dulbecco’s modified Eagle medium (DMEM) and Hams F12 (3:1) supplemented with B27 (Invitrogen GmBH, Karlsruhe, Germany), 20 ng/mL epidermal growth factor (EGF; Biosource, Karlsruhe, Germany), 20 ng/mL recombinant human fibroblast growth factor (rhFGF; R&D Systems, Wiesbaden-Nordenstadt, Germany), and penicillin and streptomycin (1:100; Invitrogen) at 37°C with 7.5% CO2 . Differentiation was initiated by growth factor withdrawal and plating onto a poly-d-lysine/ laminin matrix. The neurospheres were fed every 2-3 days by replacing 50% of the culture media with fresh media. The culture suspension was transferred to a dish containing 16 wells. The wells were divided as follows: 4 wells received no papaverine (control), 4 wells 1 u, 4 wells 5 u and 4 wells 10 u of papaverine solution. In the next 2 weeks, photography (0,4,5,11days) and viability test were done. The photographs were analysed. Results : papaverine didn't affect proliferation of neurospheres, while it affected viability compared to control , this was dose related. Conclusion: This indicates the harmful effect of papaverine suggesting it to be a candidate neurotoxin causing Parkinsonism. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=neurospheres" title="neurospheres">neurospheres</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20stem%20cells" title=" neural stem cells"> neural stem cells</a>, <a href="https://publications.waset.org/abstracts/search?q=papaverine" title=" papaverine"> papaverine</a>, <a href="https://publications.waset.org/abstracts/search?q=Parkinsonism" title=" Parkinsonism"> Parkinsonism</a> </p> <a href="https://publications.waset.org/abstracts/14864/effect-of-papaverine-on-neurospheres" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14864.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">660</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">1601</span> Improved Skin Detection Using Colour Space and Texture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Medjram%20Sofiane">Medjram Sofiane</a>, <a href="https://publications.waset.org/abstracts/search?q=Babahenini%20Mohamed%20Chaouki"> Babahenini Mohamed Chaouki</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Benali%20Yamina"> Mohamed Benali Yamina</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Skin detection is an important task for computer vision systems. A good method for skin detection means a good and successful result of the system. The colour is a good descriptor that allows us to detect skin colour in the images, but because of lightings effects and objects that have a similar colour skin, skin detection becomes difficult. In this paper, we proposed a method using the YCbCr colour space for skin detection and lighting effects elimination, then we use the information of texture to eliminate the false regions detected by the YCbCr colour skin model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=skin%20detection" title="skin detection">skin detection</a>, <a href="https://publications.waset.org/abstracts/search?q=YCbCr" title=" YCbCr"> YCbCr</a>, <a href="https://publications.waset.org/abstracts/search?q=GLCM" title=" GLCM"> GLCM</a>, <a href="https://publications.waset.org/abstracts/search?q=texture" title=" texture"> texture</a>, <a href="https://publications.waset.org/abstracts/search?q=human%20skin" title=" human skin"> human skin</a> </p> <a href="https://publications.waset.org/abstracts/19039/improved-skin-detection-using-colour-space-and-texture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19039.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">459</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">1600</span> Implementation of a Predictive DTC-SVM of an Induction Motor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chebaani%20Mohamed">Chebaani Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Gplea%20Amar"> Gplea Amar</a>, <a href="https://publications.waset.org/abstracts/search?q=Benchouia%20Mohamed%20Toufik"> Benchouia Mohamed Toufik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Direct torque control is characterized by the merits of fast response, simple structure and strong robustness to the motor parameters variations. This paper proposes the implementation of DTC-SVM of an induction motor drive using Predictive controller. The principle of the method is explained and the system mathematical description is provided. The derived control algorithm is implemented both in the simulation software MatLab/Simulink and on the real induction motor drive with dSPACE control system. Simulated and measured results in steady states and transients are presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=induction%20motor" title="induction motor">induction motor</a>, <a href="https://publications.waset.org/abstracts/search?q=DTC-SVM" title=" DTC-SVM"> DTC-SVM</a>, <a href="https://publications.waset.org/abstracts/search?q=predictive%20controller" title=" predictive controller"> predictive controller</a>, <a href="https://publications.waset.org/abstracts/search?q=implementation" title=" implementation"> implementation</a>, <a href="https://publications.waset.org/abstracts/search?q=dSPACE" title=" dSPACE"> dSPACE</a>, <a href="https://publications.waset.org/abstracts/search?q=Matlab" title=" Matlab"> Matlab</a>, <a href="https://publications.waset.org/abstracts/search?q=Simulink" title=" Simulink"> Simulink</a> </p> <a href="https://publications.waset.org/abstracts/40332/implementation-of-a-predictive-dtc-svm-of-an-induction-motor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40332.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">518</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">1599</span> Applying Fuzzy Analytic Hierarchy Process for Subcontractor Selection</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Halimi%20Mohamed%20Taher">Halimi Mohamed Taher</a>, <a href="https://publications.waset.org/abstracts/search?q=Kordoghli%20Bassem"> Kordoghli Bassem</a>, <a href="https://publications.waset.org/abstracts/search?q=Ben%20Hassen%20Mohamed"> Ben Hassen Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Sakli%20Faouzi"> Sakli Faouzi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Textile and clothing manufacturing industry is based largely on subcontracting system. Choosing the right subcontractor became a strategic decision that can affect the financial position of the company and even his market position. Subcontracting firms in Tunisia are lead to define an appropriate selection process which takes into account several quantitative and qualitative criteria. In this study, a methodology is proposed that includes a Fuzzy Analytic Hierarchy Process (AHP) in order to incorporate the ambiguities and uncertainties in qualitative decision. Best subcontractors for two Tunisian firms are determined based on model results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AHP" title="AHP">AHP</a>, <a href="https://publications.waset.org/abstracts/search?q=subcontractor" title=" subcontractor"> subcontractor</a>, <a href="https://publications.waset.org/abstracts/search?q=multicriteria" title=" multicriteria"> multicriteria</a>, <a href="https://publications.waset.org/abstracts/search?q=selection" title=" selection"> selection</a> </p> <a href="https://publications.waset.org/abstracts/31442/applying-fuzzy-analytic-hierarchy-process-for-subcontractor-selection" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31442.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">689</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">1598</span> Behavior of Beam-Column Nodes Reinforced Concrete in Earthquake Zones</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zaidour%20Mohamed">Zaidour Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Ghalem%20Ali%20Jr."> Ghalem Ali Jr.</a>, <a href="https://publications.waset.org/abstracts/search?q=Achit%20Henni%20Mohamed"> Achit Henni Mohamed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This project is destined to study pole junctions of reinforced concrete beams subjected to seismic loads. A literature review was made to clarify the work done by researchers in the last three decades and especially the results of the last two years that were studied for the determination of the method of calculating the transverse reinforcement in the different nodes of a structure. For implementation efforts in the columns and beams of a building R + 4 in zone 3 were calculated using the finite element method through software. These results are the basis of our work which led to the calculation of the transverse reinforcement of the nodes of the structure in question. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=beam%E2%80%93column%20joints" title="beam–column joints">beam–column joints</a>, <a href="https://publications.waset.org/abstracts/search?q=cyclic%20loading" title=" cyclic loading"> cyclic loading</a>, <a href="https://publications.waset.org/abstracts/search?q=shearing%20force" title=" shearing force"> shearing force</a>, <a href="https://publications.waset.org/abstracts/search?q=damaged%20joint" title=" damaged joint"> damaged joint</a> </p> <a href="https://publications.waset.org/abstracts/16216/behavior-of-beam-column-nodes-reinforced-concrete-in-earthquake-zones" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16216.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">550</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">1597</span> Contribution to the Analytical Study of the Stability of a DC-DC Converter (Boost) Used for MPPT Control</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Amarouayache">Mohamed Amarouayache</a>, <a href="https://publications.waset.org/abstracts/search?q=Badia%20Amrouche"> Badia Amrouche</a>, <a href="https://publications.waset.org/abstracts/search?q=Gharbi%20Akila"> Gharbi Akila</a>, <a href="https://publications.waset.org/abstracts/search?q=Boukadoume%20Mohamed"> Boukadoume Mohamed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work is devoted to the modeling of DC-DC converter (boost) used for MPPT applications to set conditions of stability. For this, we establish a linear mathematical model of the DC-DC converter with an average small signal model. This model has allowed us to apply conventional linear methods of automation. A mathematical relationship between the duty cycle and the voltage of the panel has been set up. With this relationship we specify the conditions of the stability in closed-loop depending on the system parameters (the elements of storage capacity and inductance, PWM control). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MPPT" title="MPPT">MPPT</a>, <a href="https://publications.waset.org/abstracts/search?q=PWM" title=" PWM"> PWM</a>, <a href="https://publications.waset.org/abstracts/search?q=stability" title=" stability"> stability</a>, <a href="https://publications.waset.org/abstracts/search?q=criterion%20of%20Routh" title=" criterion of Routh"> criterion of Routh</a>, <a href="https://publications.waset.org/abstracts/search?q=average%20small%20signal%20model" title=" average small signal model "> average small signal model </a> </p> <a href="https://publications.waset.org/abstracts/2045/contribution-to-the-analytical-study-of-the-stability-of-a-dc-dc-converter-boost-used-for-mppt-control" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2045.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">444</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">1596</span> Schiff Bases of Isatin and Admantane-1-Carbohydrazide: Synthesis, Characterization, and Anticonvulsant Activity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hind%20O.%20Osman">Hind O. Osman</a>, <a href="https://publications.waset.org/abstracts/search?q=Tilal%20Elsaman"> Tilal Elsaman</a>, <a href="https://publications.waset.org/abstracts/search?q=Bashir%20A.%20Yousef"> Bashir A. Yousef</a>, <a href="https://publications.waset.org/abstracts/search?q=Esraa%20Elhadi"> Esraa Elhadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Aimun%20A.%20E.%20Ahmed"> Aimun A. E. Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Eyman%20Mohamed%20Eltayib"> Eyman Mohamed Eltayib</a>, <a href="https://publications.waset.org/abstracts/search?q=Malik%20Suliman%20Mohamed"> Malik Suliman Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Magdi%20Awadalla%20Mohamed"> Magdi Awadalla Mohamed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Epilepsy is the most common neurological condition and cause of substantial morbidity and mortality. In the present study, the molecular hybridization tool was adopted to obtain six Schiﬀ bases of isatin and adamantane-1-carbohydrazide (18–23). Then, their anticonvulsant activity was evaluated using a pentylenetetrazole- (PTZ-) induced seizure model using phenobarbitone as a positive control. Our ﬁndings showed that compounds 18–23 provided signiﬁcant protection against PTZ-induced seizure, and maximum activities were associated with compound 23. Moreover, all investigated compounds increased the latency of induced convulsion and reduced the duration of epilepsy, with compound 23 being the best. Interestingly, most of the synthesized molecules showed a reduction in neurological symptoms and severity of the seizure. Molecular docking studies suggest GABA-A receptor as a potential target, and in silico ADME screening revealed that the pharmaceutical properties of compound 23 are within the speciﬁed limit. Thus, compound 23 was identified as a promising candidate that warrants further drug discovery processes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=isatin%20and%20adamantane" title="isatin and adamantane">isatin and adamantane</a>, <a href="https://publications.waset.org/abstracts/search?q=anticonvulsant%20activity" title=" anticonvulsant activity"> anticonvulsant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=PTZ-induced%20seizure" title=" PTZ-induced seizure"> PTZ-induced seizure</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20docking" title=" molecular docking"> molecular docking</a> </p> <a href="https://publications.waset.org/abstracts/145055/schiff-bases-of-isatin-and-admantane-1-carbohydrazide-synthesis-characterization-and-anticonvulsant-activity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/145055.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">207</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">1595</span> Compact Ultra-Wideband Printed Monopole Antenna with Inverted L-Shaped Slots for Data Communication and RF Energy Harvesting</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Adel%20Sennouni">Mohamed Adel Sennouni</a>, <a href="https://publications.waset.org/abstracts/search?q=Jamal%20Zbitou"> Jamal Zbitou</a>, <a href="https://publications.waset.org/abstracts/search?q=Benaissa%20Abboud"> Benaissa Abboud</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelwahed%20Tribak"> Abdelwahed Tribak</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamid%20Bennis"> Hamid Bennis</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Latrach"> Mohamed Latrach </a> </p> <p class="card-text"><strong>Abstract:</strong></p> A compact UWB planar antenna fed with a microstrip-line is proposed. The new design is composed of a rectangular patch with symmetric L-shaped slots and fed by 50 Ω microstrip transmission line and a reduced ground-plane which have a periodic slots with an overall size of 47 mm x 20 mm. It is intended to be used in wireless applications that cover the ultra-wideband (UWB) frequency band. A wider impedance bandwidth of around 116.5% (1.875 <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=UWB%20planar%20antenna" title="UWB planar antenna">UWB planar antenna</a>, <a href="https://publications.waset.org/abstracts/search?q=L-shaped%20slots" title=" L-shaped slots"> L-shaped slots</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20applications" title=" wireless applications"> wireless applications</a>, <a href="https://publications.waset.org/abstracts/search?q=impedance%20band-width" title=" impedance band-width"> impedance band-width</a>, <a href="https://publications.waset.org/abstracts/search?q=radiation%20pattern" title=" radiation pattern"> radiation pattern</a>, <a href="https://publications.waset.org/abstracts/search?q=CST" title=" CST"> CST</a> </p> <a href="https://publications.waset.org/abstracts/16119/compact-ultra-wideband-printed-monopole-antenna-with-inverted-l-shaped-slots-for-data-communication-and-rf-energy-harvesting" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16119.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">487</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">1594</span> Assessment of Human Factors Analysis and Classification System in Construction Accident Prevention</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zakari%20Mustapha">Zakari Mustapha</a>, <a href="https://publications.waset.org/abstracts/search?q=Clinton%20%20Aigbavboa"> Clinton Aigbavboa</a>, <a href="https://publications.waset.org/abstracts/search?q=Wellington%20Didi%20Thwala"> Wellington Didi Thwala</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Majority of the incidents and accidents in complex high-risk systems that exist in the construction industry and other sectors have been attributed to unsafe acts of workers. The purpose of this paper was to asses Human Factors Analysis and Classification System (HFACS) in construction accident prevention. The study was conducted through the use of secondary data from journals, books and internet to achieve the objective of the study. The review of literature looked into details of different views from different scholars about HFACS framework in accidents investigations. It further highlighted on various sections or disciplines of accident occurrences in human performance within the construction. The findings from literature review showed that unsafe acts of a worker and unsafe working conditions are the two major causes of accident in the construction industry.Most significant factor in the cause of site accident in the construction industry is unsafe acts of a worker. The findings also show how the application of HFACS framework in the investigation of accident will lead to the identification of common trends. Further findings show that provision for the prevention of accident will be made based on past accident records to identify and prioritize where intervention is needed within the construction industry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=accident" title="accident">accident</a>, <a href="https://publications.waset.org/abstracts/search?q=construction" title=" construction"> construction</a>, <a href="https://publications.waset.org/abstracts/search?q=HFACS" title=" HFACS"> HFACS</a>, <a href="https://publications.waset.org/abstracts/search?q=unsafe%20acts" title=" unsafe acts"> unsafe acts</a> </p> <a href="https://publications.waset.org/abstracts/51509/assessment-of-human-factors-analysis-and-classification-system-in-construction-accident-prevention" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51509.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">1593</span> Liquid-Liquid Extraction of Uranium(vi) from Aqueous Solution Using 1-Hydroxyalkylidene-1,1-Diphosphonic Acids </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Bouhoun%20Ali">M. Bouhoun Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Y.%20Badjah%20Hadj%20Ahmed"> A. Y. Badjah Hadj Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Attou"> M. Attou</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Elias"> A. Elias</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Didi"> M. A. Didi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The extraction of uranium(VI) from aqueous solutions has been investigated using 1-hydroxyhexadecylidene-1,1-diphosphonic acid (HHDPA) and 1-hydroxydodecylidene-1,1-diphosphonic acid (HDDPA), which were synthesized and characterized by elemental analysis and by FT-IR, 1H NMR, 31P NMR spectroscopy. In this paper, we propose a tentative assignment for the shifts of those two ligands and their specific complexes with uranium(VI). We carried out the extraction of uranium(VI) by HHDPA and HDDPA from [carbon tetrachloride + 2-octanol (v/v: 90%/10%)] solutions. Various factors such as contact time, pH, organic/aqueous phase ratio and extractant concentration were considered. The optimum conditions obtained were: contact time= 20 min, organic/aqueous phase ratio = 1, pH value = 3.0 and extractant concentration = 0.3M. The extraction yields are more significant in the case of the HHDPA which is equipped with a hydrocarbon chain, longer than that of the HDDPA. Logarithmic plots of the uranium(VI) distribution ratio vs. pHeq and the extractant concentration showed that the ratio of extractant to extracted uranium(VI) (ligand/metal) is 2:1. The formula of the complex of uranium(VI) with the HHDPA and the DHDPA is UO2(H3L)2 (HHDPA and DHDPA are denoted as H4L). A spectroscopic analysis has showed that coordination of uranium(VI) takes place via oxygen atoms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=liquid-liquid%20extraction" title="liquid-liquid extraction">liquid-liquid extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=uranium%28vi%29" title=" uranium(vi)"> uranium(vi)</a>, <a href="https://publications.waset.org/abstracts/search?q=1-hydroxyalkylidene-1" title=" 1-hydroxyalkylidene-1"> 1-hydroxyalkylidene-1</a>, <a href="https://publications.waset.org/abstracts/search?q=1-diphosphonic%20acids" title="1-diphosphonic acids">1-diphosphonic acids</a>, <a href="https://publications.waset.org/abstracts/search?q=hhdpa" title=" hhdpa"> hhdpa</a>, <a href="https://publications.waset.org/abstracts/search?q=hddpa" title=" hddpa"> hddpa</a>, <a href="https://publications.waset.org/abstracts/search?q=aqueous%20solution" title=" aqueous solution"> aqueous solution</a> </p> <a href="https://publications.waset.org/abstracts/37850/liquid-liquid-extraction-of-uraniumvi-from-aqueous-solution-using-1-hydroxyalkylidene-11-diphosphonic-acids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37850.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">268</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">1592</span> Study of the Phenomenon Nature of Order and Disorder in BaMn(Fe/V)F7 Fluoride Glass by the Hybrid Reverse Monte Carlo Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sidi%20Mohamed%20Mesli">Sidi Mohamed Mesli</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Habchi"> Mohamed Habchi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Kotbi"> Mohamed Kotbi</a>, <a href="https://publications.waset.org/abstracts/search?q=Rafik%20Benallal"> Rafik Benallal</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelali%20Derouiche"> Abdelali Derouiche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fluoride glasses with a nominal composition of BaMnMF7 (M = FeV assuming isomorphous replacement) have been structurally modelled through the simultaneous simulation of their neutron diffraction patterns by a reverse Monte Carlo (RMC) model and by a Rietveld for disordered materials (RDM) method. Model is consistent with an expected network of interconnected [MF6] polyhedra. The RMC results are accompanied by artificial satellite peaks. To remedy this problem, we use an extension of the RMC algorithm, which introduces an energy penalty term in acceptance criteria. This method is called the Hybrid Reverse Monte Carlo (HRMC) method. The idea of this paper is to apply the (HRMC) method to the title glasses, in order to make a study of the phenomenon nature of order and disorder by displaying and discussing the partial pair distribution functions (PDFs) g(r). We suggest that this method can be used to describe average correlations between components of fluoride glass or similar system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluoride%20glasses" title="fluoride glasses">fluoride glasses</a>, <a href="https://publications.waset.org/abstracts/search?q=RMC%20simulation" title=" RMC simulation"> RMC simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=neutron%20scattering" title=" neutron scattering"> neutron scattering</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20RMC%20simulation" title=" hybrid RMC simulation"> hybrid RMC simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=Lennard-Jones%20potential" title=" Lennard-Jones potential"> Lennard-Jones potential</a>, <a href="https://publications.waset.org/abstracts/search?q=partial%20pair%20distribution%20functions" title=" partial pair distribution functions"> partial pair distribution functions</a> </p> <a href="https://publications.waset.org/abstracts/3016/study-of-the-phenomenon-nature-of-order-and-disorder-in-bamnfevf7-fluoride-glass-by-the-hybrid-reverse-monte-carlo-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3016.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">534</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">1591</span> Polyphenol and Antimicrobial Activity in Olive Oil from Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kamel%20Zemour">Kamel Zemour</a>, <a href="https://publications.waset.org/abstracts/search?q=Kada%20Mohamed%20Amine%20Chouhim"> Kada Mohamed Amine Chouhim</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Mairif"> Mohamed Mairif</a>, <a href="https://publications.waset.org/abstracts/search?q=Tadj%20Eddine%20Adda%20Ardjan"> Tadj Eddine Adda Ardjan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many recent studies show the positive effect of phenolic compounds in olive oil on health. They are known for their biological properties, where they have shown potential activity as an antioxidant, anti-inflammatory, and antimicrobial agents. However, this characteristic is rarely studied in olive oil from different regions of Algeria. Different samples collected from the western region of Algeria were evaluated for their polyphenol content, antioxidant activity, and antimicrobial effect. The obtained results demonstrated that this oil is rich in polyphenols and revealed high antimicrobial activity against Staphylococcus aureus and Escherichia coli. Finally, this study has highlighted the nutritional and pharmaceutical importance of olive oil grown in Algeria. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=olive%20oil" title="olive oil">olive oil</a>, <a href="https://publications.waset.org/abstracts/search?q=polyphenols" title=" polyphenols"> polyphenols</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=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</a> </p> <a href="https://publications.waset.org/abstracts/159649/polyphenol-and-antimicrobial-activity-in-olive-oil-from-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159649.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">152</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">1590</span> Chemical Modification of PVC and Its Surface Analysis by Means of XPS and Contact Angle Measurements</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Akrmi">Ali Akrmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Beji"> Mohamed Beji</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Baklouti"> Ahmed Baklouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Djouani"> Fatma Djouani</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Lang"> Philippe Lang</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20M.%20Chehimi"> Mohamed M. Chehimi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Poly(vinyl chloride) (PVC) is a highly versatile polymer with excellent balance of properties and numerous applications such as water pipes, packaging and polymer materials of importance in the biomedical sector. However, depending on the applications, it is necessary to modify PVC by mixing with a plasticizer; surface modification using plasma, surface grafting or flame treatment; or bulk chemical modification which affects the entire PVC chains at an extent that can be tuned by the polymer chemist. The targeted applications are improvement of chemical resistance, avoiding or limitation of migration of toxic plasticizers, improvement of antibacterial properties, or control of blood compatibility. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=poly%28vinyl%20chloride%29" title="poly(vinyl chloride)">poly(vinyl chloride)</a>, <a href="https://publications.waset.org/abstracts/search?q=nucleophilic%20substitution" title=" nucleophilic substitution"> nucleophilic substitution</a>, <a href="https://publications.waset.org/abstracts/search?q=sulfonylcarbamates" title=" sulfonylcarbamates"> sulfonylcarbamates</a>, <a href="https://publications.waset.org/abstracts/search?q=XPS" title=" XPS"> XPS</a> </p> <a href="https://publications.waset.org/abstracts/13663/chemical-modification-of-pvc-and-its-surface-analysis-by-means-of-xps-and-contact-angle-measurements" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13663.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">705</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=Mohamed%20Didi%20Ouldelhadj&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mohamed%20Didi%20Ouldelhadj&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mohamed%20Didi%20Ouldelhadj&page=4">4</a></li> <li class="page-item"><a class="page-link" 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