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Peterson</title> <meta name="description" content="Search results for: Ulla Peterson"> <meta name="keywords" content="Ulla Peterson"> <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="Ulla Peterson"> <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> 20</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Ulla Peterson</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">20</span> Adsorption of Methyl Violet Dye from Aqueous Solution onto Modified Kapok Sawdust : Characteristics and Equilibrium Studies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Widi%20Astuti">Widi Astuti</a>, <a href="https://publications.waset.org/abstracts/search?q=Triastuti%20Sulistyaningsih"> Triastuti Sulistyaningsih</a>, <a href="https://publications.waset.org/abstracts/search?q=Masni%20Maksiola"> Masni Maksiola</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Kapok sawdust, an inexpensive material, has been utilized as an adsorbent for the removal of methyl violet in aqueous solution. To increase the adsorption capacity, kapok sawdust was reacted with sodium hydroxide (NaOH) solution having various concentrations. Various physico-chemical parameters such as solution pH, contact time and initial dye concentration were studied. Langmuir, Freundlich and Redlich-Peterson isotherm model were used to analyze the equilibrium data. The research shows that the experimental data fitted well with the Redlich-Peterson model, with the value of constants are 41.001 for KR, 0.523 for aR and 0.799 for g. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=kapok%20sawdust" title="kapok sawdust">kapok sawdust</a>, <a href="https://publications.waset.org/abstracts/search?q=methyl%20violet" title=" methyl violet"> methyl violet</a>, <a href="https://publications.waset.org/abstracts/search?q=dye" title=" dye"> dye</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a> </p> <a href="https://publications.waset.org/abstracts/31072/adsorption-of-methyl-violet-dye-from-aqueous-solution-onto-modified-kapok-sawdust-characteristics-and-equilibrium-studies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31072.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">312</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">19</span> Exposure to Violence and Its Association with Mental Health in Swedish Prospective Exchange Students and Campus Students</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Emil%20Danehorn">Emil Danehorn</a>, <a href="https://publications.waset.org/abstracts/search?q=Ulla%20Peterson"> Ulla Peterson</a>, <a href="https://publications.waset.org/abstracts/search?q=Marie%20Oscarsson"> Marie Oscarsson</a>, <a href="https://publications.waset.org/abstracts/search?q=Goldina%20Smirthwaite"> Goldina Smirthwaite</a>, <a href="https://publications.waset.org/abstracts/search?q=Katarina%20Swahnberg"> Katarina Swahnberg</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Swedish students who choose to study abroad are common, but there has been limited research on exchange students. There are indications that some Swedish exchange students have been exposed to violence, but it is not known if they, already before their semester abroad, are more exposed to violence than students who remain on campus. Our aim was to investigate potential differences in exposure to physical, sexual, and emotional violence between prospective exchange students and campus students and between male and female students in general, as well as to determine any associations between mental health and exposure to violence among students in the total sample. Method: Comparative cross-sectional design using an online survey containing the NorVold Abuse Questionnaire and the General Health Questionnaire 12. A total of 565 participants took part in the study. Results: Prospective exchange students were less exposed to emotional violence compared to campus students. About one-half of all the participating female students had been exposed to sexual violence and about one-third of all the male students had been exposed to physical violence. The results also indicated that exposure to more than one form of violence was associated with poor mental health for students as a group. Conclusion: Prospective exchange students as a group do not report more exposure to physical and sexual violence than campus students but do report less exposure to emotional violence. However, the overall frequency of exposure to violence among the students was high. This highlights the need for proactive efforts for everyone, not least for exchange students who will be staying in a new environment unknown to them. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sexual%20violence" title="sexual violence">sexual violence</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20violence" title=" physical violence"> physical violence</a>, <a href="https://publications.waset.org/abstracts/search?q=emotional%20violence" title=" emotional violence"> emotional violence</a>, <a href="https://publications.waset.org/abstracts/search?q=exchange%20students" title=" exchange students"> exchange students</a>, <a href="https://publications.waset.org/abstracts/search?q=mental%20health" title=" mental health"> mental health</a> </p> <a href="https://publications.waset.org/abstracts/150265/exposure-to-violence-and-its-association-with-mental-health-in-swedish-prospective-exchange-students-and-campus-students" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150265.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">123</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">18</span> Multiple Positive Solutions for Boundary Value Problem of Nonlinear Fractional Differential Equation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Guezane-Lakoud">A. Guezane-Lakoud</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Bensebaa"> S. Bensebaa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we study a boundary value problem of nonlinear fractional differential equation. Existence and positivity results of solutions are obtained. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=positive%20solution" title="positive solution">positive solution</a>, <a href="https://publications.waset.org/abstracts/search?q=fractional%20caputo%20derivative" title=" fractional caputo derivative"> fractional caputo derivative</a>, <a href="https://publications.waset.org/abstracts/search?q=Banach%20contraction%20principle" title=" Banach contraction principle"> Banach contraction principle</a>, <a href="https://publications.waset.org/abstracts/search?q=Avery%20and%20Peterson%20fixed%20point%20theorem" title=" Avery and Peterson fixed point theorem"> Avery and Peterson fixed point theorem</a> </p> <a href="https://publications.waset.org/abstracts/17545/multiple-positive-solutions-for-boundary-value-problem-of-nonlinear-fractional-differential-equation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17545.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">414</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">17</span> COVID-19, Employee Perspectives, and the Shifting Nature of Work</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jonathan%20H.%20Westover">Jonathan H. Westover</a>, <a href="https://publications.waset.org/abstracts/search?q=Maureen%20S.%20Andrade"> Maureen S. Andrade</a>, <a href="https://publications.waset.org/abstracts/search?q=Angela%20Schill"> Angela Schill</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeff%20Peterson"> Jeff Peterson</a>, <a href="https://publications.waset.org/abstracts/search?q=Samuel%20Choi"> Samuel Choi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this research is to understand employee perspectives on their work characteristics and conditions, particularly related to the COVID-19 pandemic and the future of work. Working conditions impact job satisfaction. People tend to measure job satisfaction by comparing aspects of the job they have with those they want. Job satisfaction is related to the value that one places on specific aspects of a job, such as autonomy, pay and benefits, challenge, growth, or meaningful work, and the degree to which such elements are present. The value one places on these various job characteristics may differ based on gender, age, personality, occupation, context, or other factors. This study will examine various job characteristics and working conditions with an emphasis on COVID-19 to determine how managers and leaders and better support and develop their employees. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=COVID-19" title="COVID-19">COVID-19</a>, <a href="https://publications.waset.org/abstracts/search?q=employee%20perspectives%20nature%20of%20work" title=" employee perspectives nature of work"> employee perspectives nature of work</a>, <a href="https://publications.waset.org/abstracts/search?q=future%20of%20work" title=" future of work"> future of work</a> </p> <a href="https://publications.waset.org/abstracts/145155/covid-19-employee-perspectives-and-the-shifting-nature-of-work" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/145155.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">169</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">16</span> Development of Sulfite Biosensor Based on Sulfite Oxidase Immobilized on 3-Aminoproplytriethoxysilane Modified Indium Tin Oxide Electrode</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pawasuth%20Saengdee">Pawasuth Saengdee</a>, <a href="https://publications.waset.org/abstracts/search?q=Chamras%20Promptmas"> Chamras Promptmas</a>, <a href="https://publications.waset.org/abstracts/search?q=Ting%20Zeng"> Ting Zeng</a>, <a href="https://publications.waset.org/abstracts/search?q=Silke%20Leimk%C3%BChler"> Silke Leimkühler</a>, <a href="https://publications.waset.org/abstracts/search?q=Ulla%20Wollenberger"> Ulla Wollenberger</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sulfite has been used as a versatile preservative to limit the microbial growth and to control the taste in some food and beverage. However, it has been reported to cause a wide spectrum of severe adverse reactions. Therefore, it is important to determine the amount of sulfite in food and beverage to ensure consumer safety. An efficient electrocatalytic biosensor for sulfite detection was developed by immobilizing of human sulfite oxidase (hSO) on 3-aminoproplytriethoxysilane (APTES) modified indium tin oxide (ITO) electrode. Cyclic voltammetry was employed to investigate the electrochemical characteristics of the hSO modified ITO electrode for various pretreatment and binding conditions. Amperometry was also utilized to demonstrate the current responses of the sulfite sensor toward sodium sulfite in an aqueous solution at a potential of 0 V (vs. Ag/AgCl 1 M KCl). The proposed sulfite sensor has a linear range between 0.5 to 2 mM with a correlation coefficient 0.972. Then, the additional polymer layer of PVA was introduced to extend the linear range of sulfite sensor and protect the enzyme. The linear range of sulfite sensor with 5% coverage increases from 2.8 to 20 mM at a correlation coefficient of 0.983. In addition, the stability of sulfite sensor with 5% PVA coverage increases until 14 days when kept in 0.5 mM Tris-buffer, pH 7.0 at 4 8C. Therefore, this sensor could be applied for the detection of sulfite in the real sample, especially in food and beverage. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sulfite%20oxidase" title="sulfite oxidase">sulfite oxidase</a>, <a href="https://publications.waset.org/abstracts/search?q=bioelectrocatalytsis" title=" bioelectrocatalytsis"> bioelectrocatalytsis</a>, <a href="https://publications.waset.org/abstracts/search?q=indium%20tin%20oxide" title=" indium tin oxide"> indium tin oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=direct%20electrochemistry" title=" direct electrochemistry"> direct electrochemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=sulfite%20sensor" title=" sulfite sensor"> sulfite sensor</a> </p> <a href="https://publications.waset.org/abstracts/67534/development-of-sulfite-biosensor-based-on-sulfite-oxidase-immobilized-on-3-aminoproplytriethoxysilane-modified-indium-tin-oxide-electrode" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/67534.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">231</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">15</span> Adsorption of Phenolic Compounds on Activated Carbon DSAC36-24</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khaoula%20Hidouri">Khaoula Hidouri</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Benhmidene"> Ali Benhmidene</a>, <a href="https://publications.waset.org/abstracts/search?q=Bechir%20Chouachi"> Bechir Chouachi</a>, <a href="https://publications.waset.org/abstracts/search?q=Dhananjay%20R.%20Mishra"> Dhananjay R. Mishra</a>, <a href="https://publications.waset.org/abstracts/search?q=Ammar%20Houas"> Ammar Houas </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Activated carbon DSAC36-24 iy is adsorbent materials, characterized by a specific surface area of 548.13 m²g⁻¹. Their manufacture uses the natural raw materials like the nucleus of dates. In this study the treatment is done in two stages: A chemical treatment by H<sub>3</sub>PO<sub>4</sub> followed by a physical treatment under nitrogen for 1 hour then under stream of CO<sub>2</sub> for 24 hours. A characterization of the various parameters was determined such as the measurement of the specific surface area, determination of pHPZC, bulk density, iodine value. The study of the adsorption of organic molecules (hydroquinone, paranitrophenol, 2,4-dinitrophenol, 2,4,6-trinitrophenol) indicates that the adsorption phenomena are essentially due to the van der Waals interaction. In the case of organic molecules carrying the polar substituents, the existence of hydrogen bonds is also proved by the donor-acceptor forces. The study of the pH effect was done with modeling by different models (Langmuir, Freundlich, Langmuir-Freundlich, Redlich-Peterson), a kinetic treatment is also followed by the application of Lagergren, Weber, Macky. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsoprtion%20ishoterms" title="adsoprtion ishoterms">adsoprtion ishoterms</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption%20kinetics" title=" adsorption kinetics"> adsorption kinetics</a>, <a href="https://publications.waset.org/abstracts/search?q=DSAC36-24" title=" DSAC36-24"> DSAC36-24</a>, <a href="https://publications.waset.org/abstracts/search?q=organic%20molecule" title=" organic molecule"> organic molecule</a> </p> <a href="https://publications.waset.org/abstracts/70701/adsorption-of-phenolic-compounds-on-activated-carbon-dsac36-24" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70701.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">279</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">14</span> The Use of Piezocone Penetration Test Data for the Assessment of Iron Ore Tailings Liquefaction Susceptibility </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Breno%20M.%20Castilho">Breno M. Castilho</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Iron Ore Quadrangle, located in the state of Minas Gerais, Brazil is responsible for most of the country’s iron ore production. As a result, some of the biggest tailings dams in the country are located in this area. In recent years, several major failure events have happened in Tailings Storage Facilities (TSF) located in the Iron Ore Quadrangle. Some of these failures were found to be caused by liquefaction flowslides. This paper presents Piezocone Penetration Test (CPTu) data that was used, by applying Olson and Peterson methods, for the liquefaction susceptibility assessment of the iron ore tailings that are typically found in most TSF in the area. Piezocone data was also used to determine the steady-state strength of the tailings so as to allow for comparison with its drained strength. Results have shown great susceptibility for liquefaction to occur in the studied tailings and, more importantly, a large reduction in its strength. These results are key to understanding the failures that took place over the last few years. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Piezocone%20Penetration%20Test%20CPTu" title="Piezocone Penetration Test CPTu">Piezocone Penetration Test CPTu</a>, <a href="https://publications.waset.org/abstracts/search?q=iron%20ore%20tailings" title=" iron ore tailings"> iron ore tailings</a>, <a href="https://publications.waset.org/abstracts/search?q=mining" title=" mining"> mining</a>, <a href="https://publications.waset.org/abstracts/search?q=liquefaction%20susceptibility%20assessment" title=" liquefaction susceptibility assessment"> liquefaction susceptibility assessment</a> </p> <a href="https://publications.waset.org/abstracts/74404/the-use-of-piezocone-penetration-test-data-for-the-assessment-of-iron-ore-tailings-liquefaction-susceptibility" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74404.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">233</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">13</span> Development and Usability Assessment of a Connected Resistance Exercise Band Application for Strength-Monitoring</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20A.%20Batsis">J. A. Batsis</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20G.%20Boateng"> G. G. Boateng</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20M.%20Seo"> L. M. Seo</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20L.%20Petersen"> C. L. Petersen</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20L.%20Fortuna"> K. L. Fortuna</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20V.%20Wechsler"> E. V. Wechsler</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20J.%20Peterson"> R. J. Peterson</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20B.%20Cook"> S. B. Cook</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Pidgeon"> D. Pidgeon</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20S.%20Dokko"> R. S. Dokko</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20J.%20Halter"> R. J. Halter</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20F.%20Kotz"> D. F. Kotz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Resistance exercise bands are a core component of any physical activity strengthening program. Strength training can mitigate the development of sarcopenia, the loss of muscle mass or strength and function with aging. Yet, the adherence of such behavioral exercise strategies in a home-based setting are fraught with issues of monitoring and compliance. Our group developed a Bluetooth-enabled resistance exercise band capable of transmitting data to an open-source platform. In this work, we developed an application to capture this information in real-time, and conducted three usability studies in two mixed-aged groups of participants (n=6 each) and a group of older adults with obesity participating in a weight-loss intervention (n=20). The system was favorable, acceptable and provided iterative information that could assist in future deployment on ubiquitous platforms. Our formative work provides the foundation to deliver home-based monitoring interventions in a high-risk, older adult population. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=application" title="application">application</a>, <a href="https://publications.waset.org/abstracts/search?q=mHealth" title=" mHealth"> mHealth</a>, <a href="https://publications.waset.org/abstracts/search?q=older%20adult" title=" older adult"> older adult</a>, <a href="https://publications.waset.org/abstracts/search?q=resistance%20exercise%20band" title=" resistance exercise band"> resistance exercise band</a>, <a href="https://publications.waset.org/abstracts/search?q=sarcopenia" title=" sarcopenia"> sarcopenia</a> </p> <a href="https://publications.waset.org/abstracts/101717/development-and-usability-assessment-of-a-connected-resistance-exercise-band-application-for-strength-monitoring" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/101717.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">174</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">12</span> Removal of Hexavalent Chromium from Aqueous Solutions by Biosorption Using Macadamia Nutshells: Effect of Different Treatment Methods</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vusumzi%20E.%20Pakade">Vusumzi E. Pakade</a>, <a href="https://publications.waset.org/abstracts/search?q=Themba%20D.%20Ntuli"> Themba D. Ntuli</a>, <a href="https://publications.waset.org/abstracts/search?q=Augustine%20E.%20Ofomaja"> Augustine E. Ofomaja</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Macadamia nutshell biosorbents treated in three different methods (raw Macadamia nutshell powder (RMN), acid-treated Macadamia nutshell (ATMN) and base-treated Macadamia nutshell (BTMN)) were investigated for the adsorption of Cr(VI) from aqueous solutions. Fourier transform infrared spectroscopy (FT-IR) spectra of free and Cr(VI)-loaded sorbents as well as thermogravimetric analysis (TGA) revealed that the acid and base treatments modified the surface properties of the sorbents. The optimum conditions for the adsorption of Cr(VI) by sorbents were pH 2, contact time 10 h, adsorbent dosage 0.2 g L-1, and concentration 100 mg L-1. The different treatment methods altered the surface characteristics of the sorbents and produced different maximum binding capacities of 42.5, 40.6 and 37.5 mg g-1 for RMN, ATMN and BTMN, respectively. The data was fitted into the Langmuir, Freundlich, Redlich-Peterson and Sips isotherms. No single model could clearly explain the data perhaps due to the complexity of process taking place. The kinetic modeling results showed that the process of Cr(VI) biosorption with Macadamia sorbents was better described by a process of chemical sorption in pseudo-second order. These results showed that the three treatment methods yielded different surface properties which then influenced adsorption of Cr(VI) differently. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biosorption" title="biosorption">biosorption</a>, <a href="https://publications.waset.org/abstracts/search?q=chromium%28VI%29" title=" chromium(VI)"> chromium(VI)</a>, <a href="https://publications.waset.org/abstracts/search?q=isotherms" title=" isotherms"> isotherms</a>, <a href="https://publications.waset.org/abstracts/search?q=Macadamia" title=" Macadamia"> Macadamia</a>, <a href="https://publications.waset.org/abstracts/search?q=reduction" title=" reduction"> reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=treatment" title=" treatment"> treatment</a> </p> <a href="https://publications.waset.org/abstracts/36927/removal-of-hexavalent-chromium-from-aqueous-solutions-by-biosorption-using-macadamia-nutshells-effect-of-different-treatment-methods" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36927.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">267</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">11</span> Preparation of Activated Carbon from Lignocellulosic Precursor for Dyes Adsorption</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Mokaddem">H. Mokaddem</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Miroud"> D. Miroud</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Azouaou"> N. Azouaou</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Si-Ahmed"> F. Si-Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Z.%20Sadaoui"> Z. Sadaoui</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The synthesis and characterization of activated carbon from local lignocellulosic precursor (Algerian alfa) was carried out for the removal of cationic dyes from aqueous solutions. The effect of the production variables such as impregnation chemical agents, impregnation ratio, activation temperature and activation time were investigated. Carbon obtained using the optimum conditions (CaCl2/ 1:1/ 500°C/2H) was characterized by various analytical techniques scanning electron microscopy (SEM), infrared spectroscopic analysis (FTIR) and zero-point-of-charge (pHpzc). Adsorption tests of methylene blue on the optimal activated carbon were conducted. The effects of contact time, amount of adsorbent, initial dye concentration and pH were studied. The adsorption equilibrium examined using Langmuir, Freundlich, Temkin and Redlich–Peterson models reveals that the Langmuir model is most appropriate to describe the adsorption process. The kinetics of MB sorption onto activated carbon follows the pseudo-second order rate expression. The examination of the thermodynamic analysis indicates that the adsorption process is spontaneous (ΔG ° < 0) and endothermic (ΔH ° > 0), the positive value of the standard entropy shows the affinity between the activated carbon and the dye. The present study showed that the produced optimal activated carbon prepared from Algerian alfa is an effective low-cost adsorbent and can be employed as alternative to commercial activated carbon for removal of MB dye from aqueous solution. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=activated%20carbon" title="activated carbon">activated carbon</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=cationic%20dyes" title=" cationic dyes"> cationic dyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Algerian%20alfa" title=" Algerian alfa"> Algerian alfa</a> </p> <a href="https://publications.waset.org/abstracts/49655/preparation-of-activated-carbon-from-lignocellulosic-precursor-for-dyes-adsorption" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49655.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">228</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">10</span> A Study of Customer Aggression towards Frontline Employees in Some Hotels in Imo State, Nigeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Polycarp%20A.%20Igbojekwe">Polycarp A. Igbojekwe</a>, <a href="https://publications.waset.org/abstracts/search?q=Chizoba%20Amajuoyi"> Chizoba Amajuoyi</a>, <a href="https://publications.waset.org/abstracts/search?q=Peterson%20Nwokorie"> Peterson Nwokorie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main purpose of this study was to carry out a survey of customer’s aggression towards hotel workers and make contributions on the prevalence and rationale behind customer’s aggression. Data for the study were gathered with a four-point Likert type rating scale. Samples were drawn from frontline hotel employees, managers and customers of twelve (12) hotels selected from three zones of Imo State. Data analyses were conducted using simple percentage, descriptive statistics; and Z-test statistical technique was used to test hypotheses. Among other factors, service failure and verbal abuse by service providers and poor quality product compared to price were identified by customers as the three major factors that can lead to customer aggression. Frontline employees indentified verbal abuse as the most common mode of aggression and that customer aggression causes emotional disturbance in them. The study also revealed that customer aggression is more prevalent in the 1&2 star hotels than it is in 3-5 star hotels. Most of the hotels have not institutionalized systematic approaches needed to effectively face the challenges of customer aggression, thus, customer aggression has become a common feature in the industry. Frontline jobs demand high emotional input. Therefore, we recommend that frontline employees should be given emotional support by their managers and also trained on how to cope with emotional disturbance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=customer%20aggression" title="customer aggression">customer aggression</a>, <a href="https://publications.waset.org/abstracts/search?q=emotional%20disturbance" title=" emotional disturbance"> emotional disturbance</a>, <a href="https://publications.waset.org/abstracts/search?q=employee%20well-being" title=" employee well-being"> employee well-being</a>, <a href="https://publications.waset.org/abstracts/search?q=service%20failure" title=" service failure"> service failure</a>, <a href="https://publications.waset.org/abstracts/search?q=verbal%20abuse" title=" verbal abuse"> verbal abuse</a> </p> <a href="https://publications.waset.org/abstracts/42455/a-study-of-customer-aggression-towards-frontline-employees-in-some-hotels-in-imo-state-nigeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42455.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">277</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">9</span> Reimagining Financial Inclusion in the Post COVID-19 World: The Case of Grameen America</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rania%20Mousa">Rania Mousa</a>, <a href="https://publications.waset.org/abstracts/search?q=Peterson%20Ozili"> Peterson Ozili</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A key agenda of policymakers in developed and developing countries is to increase the level of financial inclusion. Microlending institutions have been recognized as important agents of financial inclusion, which have the potential to achieve this objective and help move toward a more accessible, inclusive, and equitable path to financial sustainability. In that respect, this case study attempts to identify and assess the key initiatives undertaken by Grameen America as it responded to the COVID-19 pandemic within the framework of selected United Nations’ Sustainability Development Goals (UN’s SD Goals). This study goes beyond the stated objective by using the vulnerable group theory and special agent theory of financial inclusion to support the analysis of financial and non-financial information collected from Grameen America’s Annual Reports and audited financial statements. The study follows a qualitative content analysis method to precisely gauge the shift in Grameen’s strategy and focus, as well as to assess the impact of its initiatives on the small business community before and after the pandemic. The findings showcase that Grameen’s longstanding mission to alleviate poverty is in line with the UN’s Sustainability Development Goal 1. Furthermore, Grameen’s commitment to creating partnerships with external organizations to offer credit and non-credit services and support is consistent with UN’s Sustainability Development Goal 17. The study suggests that policymakers should foster the creation of more member-based financial and non-financial institutions which are ethically and morally responsible to their members in both good and bad times. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=COVID-19" title="COVID-19">COVID-19</a>, <a href="https://publications.waset.org/abstracts/search?q=financial%20inclusion" title=" financial inclusion"> financial inclusion</a>, <a href="https://publications.waset.org/abstracts/search?q=microfinance" title=" microfinance"> microfinance</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20development" title=" sustainable development"> sustainable development</a>, <a href="https://publications.waset.org/abstracts/search?q=microlending" title=" microlending"> microlending</a> </p> <a href="https://publications.waset.org/abstracts/152403/reimagining-financial-inclusion-in-the-post-covid-19-world-the-case-of-grameen-america" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152403.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">70</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">8</span> A Retrospective Study to Evaluate Verbal Scores of Autistic Children Who Received Hyperbaric Oxygen Therapy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tami%20Peterson">Tami Peterson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hyperbaric oxygen therapy (HBOT) has been hypothesized as an effective treatment for increasing verbal language skills in individuals on the autism spectrum. A child’s ability to effectively communicate with peers, parents, and caregivers impacts their level of independence and quality of personal relationships. This retrospective study will compare the speech development of participants aged 2-17 years that received 40 sessions of HBOT at 2.0 ATA to those who had not. Both groups will have a verbal assessment every six months. There were 31 subjects in the HBO group and 32 subjects in the non-HBO group. The statistical analysis will focus on whether hyperbaric oxygen therapy made a significant difference in Verbal Behavior Milestones Assessment and Placement Program (VB-MAPP) or Assessment of Basic Language and Learning Skills (ABLLS) results. The evidence demonstrates a strong correlation between HBOT and an increased change from baseline verbal scores compared to the control group, even in difficult to grasp areas such as spontaneous vocalization. We suggest this is due to the anti-inflammatory effects of hyperbaric oxygen therapy. Neuroinflammation causes hypoperfusion of critical central nervous system areas responsible for the symptoms described within the autism spectrum, such as problems with thought processing, memory, and speech. Decreasing the inflammation allows the brain to function properly, which results in improved verbal scores for the participants that underwent HBOT. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=assessment%20of%20basic%20language%20and%20learning%20skills" title="assessment of basic language and learning skills">assessment of basic language and learning skills</a>, <a href="https://publications.waset.org/abstracts/search?q=autism%20spectrum%20disorder" title=" autism spectrum disorder"> autism spectrum disorder</a>, <a href="https://publications.waset.org/abstracts/search?q=hyperbaric%20oxygen%20therapy" title=" hyperbaric oxygen therapy"> hyperbaric oxygen therapy</a>, <a href="https://publications.waset.org/abstracts/search?q=verbal%20behavior%20milestones%20assessment%20and%20placement%20program" title=" verbal behavior milestones assessment and placement program"> verbal behavior milestones assessment and placement program</a> </p> <a href="https://publications.waset.org/abstracts/141735/a-retrospective-study-to-evaluate-verbal-scores-of-autistic-children-who-received-hyperbaric-oxygen-therapy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141735.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">7</span> Changes in Amino Acids Content in Muscle of European Eel (Anguilla anguilla) in Relation to Body Size</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=L.%20G%C3%B3mez-Limia">L. Gómez-Limia</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Franco"> I. Franco</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Blanco"> T. Blanco</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Mart%C3%ADnez"> S. Martínez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> European eels (<em>Anguilla anguilla</em>) belong to Anguilliformes order and Anguillidae family. They are generally classified as warm-water fish. Eels have a great commercial value in Europe and Asian countries. Eels can reach high weights, although their commercial size is relatively low in some countries. The capture of larger eels would facilitate the recovery of the species, as well as having a greater number of either glass eels or elvers for aquaculture. In the last years, the demand and the price of eels have increased significantly. However, European eel is considered critically endangered by the International Union for the Conservation of Nature (IUCN) Red List. The biochemical composition of fishes is an important aspect of quality and affects the nutritional value and consumption quality of fish. In addition, knowing this composition can help predict an individual’s condition for their recovery. Fish is known to be important source of protein rich in essential amino acids. However, there is very little information about changes in amino acids composition of European eels with increase in size. The aim of this study was to evaluate the effect of two different weight categories on the amino acids content in muscle tissue of wild European eels. European eels were caught in River Ulla (Galicia, NW Spain), during winter. The eels were slaughtered in ice water immersion. Then, they were purchased and transferred to the laboratory. The eels were subdivided into two groups, according to the weight. The samples were kept frozen (-20 °C) until their analysis. Frozen eels were defrosted and the white muscle between the head and the anal hole. was extracted, in order to obtain amino acids composition. Thirty eels for each group were used. Liquid chromatography was used for separation and quantification of amino a cids. The results conclude that the eels are rich in glutamic acid, leucine, lysine, threonine, valine, isoleucine and phenylalanine. The analysis showed that there are significant differences (p < 0.05) among the eels with different sizes. Histidine, threonine, lysine, hydroxyproline, serine, glycine, arginine, alanine and proline were higher in small eels. European eels muscle presents between 45 and 46% of essential amino acids in the total amino acids. European eels have a well-balanced and high quality protein source in the respect of E/NE ratio. However, eels with higher weight showed a better ratio of essential and non-essential amino acid. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=European%20eels" title="European eels">European eels</a>, <a href="https://publications.waset.org/abstracts/search?q=amino%20acids" title=" amino acids"> amino acids</a>, <a href="https://publications.waset.org/abstracts/search?q=HPLC" title=" HPLC"> HPLC</a>, <a href="https://publications.waset.org/abstracts/search?q=body%20size" title=" body size"> body size</a> </p> <a href="https://publications.waset.org/abstracts/103139/changes-in-amino-acids-content-in-muscle-of-european-eel-anguilla-anguilla-in-relation-to-body-size" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/103139.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">104</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">6</span> Predicting Ecological Impacts of Sea-Level Change on Coastal Conservation Areas in India</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Zafar-ul%20Islam">Mohammad Zafar-ul Islam</a>, <a href="https://publications.waset.org/abstracts/search?q=Shaily%20Menon"> Shaily Menon</a>, <a href="https://publications.waset.org/abstracts/search?q=Xingong%20Li"> Xingong Li</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Townsend%20Peterson"> A. Townsend Peterson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In addition to the mounting empirical data on direct implications of climate change for natural and human systems, evidence is increasing for other, indirect climate change phenomena such as sea-level rise. Rising sea levels and associated marine intrusion into terrestrial environments are predicted to be among the most serious eventual consequences of climate change. The many complex and interacting factors affecting sea levels create considerable uncertainty in sea-level rise projections: conservative estimates are on the order of 0.5-1.0 m globally, while other estimates are much higher, approaching 6 m. Marine intrusion associated with 1– 6 m sea-level rise will impact species and habitats in coastal ecosystems severely. Examining areas most vulnerable to such impacts may allow design of appropriate adaptation and mitigation strategies. We present an overview of potential effects of 1 and 6 m sea level rise for coastal conservation areas in the Indian Subcontinent. In particular, we examine the projected magnitude of areal losses in relevant biogeographic zones, ecoregions, protected areas (PAs), and Important Bird Areas (IBAs). In addition, we provide a more detailed and quantitative analysis of likely effects of marine intrusion on 22 coastal PAs and IBAs that provide critical habitat for birds in the form of breeding areas, migratory stopover sites, and overwintering habitats. Several coastal PAs and IBAs are predicted to experience higher than 50% losses to marine intrusion. We explore consequences of such inundation levels on species and habitat in these areas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sea-level%20change" title="sea-level change">sea-level change</a>, <a href="https://publications.waset.org/abstracts/search?q=coastal%20inundation" title=" coastal inundation"> coastal inundation</a>, <a href="https://publications.waset.org/abstracts/search?q=marine%20intrusion" title=" marine intrusion"> marine intrusion</a>, <a href="https://publications.waset.org/abstracts/search?q=biogeographic%20zones" title=" biogeographic zones"> biogeographic zones</a>, <a href="https://publications.waset.org/abstracts/search?q=ecoregions" title=" ecoregions"> ecoregions</a>, <a href="https://publications.waset.org/abstracts/search?q=protected%20areas" title=" protected areas"> protected areas</a>, <a href="https://publications.waset.org/abstracts/search?q=important%20bird%20areas" title=" important bird areas"> important bird areas</a>, <a href="https://publications.waset.org/abstracts/search?q=adaptation" title=" adaptation"> adaptation</a>, <a href="https://publications.waset.org/abstracts/search?q=mitigation" title=" mitigation"> mitigation</a> </p> <a href="https://publications.waset.org/abstracts/23541/predicting-ecological-impacts-of-sea-level-change-on-coastal-conservation-areas-in-india" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23541.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">257</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">5</span> Understanding the Impact of Ephemerality and Mobility on Social Media News: A Content Analysis of News on Snapchat</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chelsea%20Peterson-Salahuddin">Chelsea Peterson-Salahuddin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Over the past decade, news outlets have increasingly used social media as a means to create and distribute news content to audiences. Ephemerality, the transitory nature of media, and mobility, media viewing on mobile technologies, are two increasingly salient attributes of social media content; yet little is known about how these features influence news selection practices of news outlets when distributing news via social media. To account for this gap, this study examines the influences of ephemerality and mobility on social media news content on the social media application Snapchat, in order to understand how these qualities of digital media influence and shape news content. Findings from this study suggest that understandings of ephemerality and mobility play a key role in influencing social media news. This paper suggests that as these factors become increasingly salient in our dominant news viewing environments, being able to understand how they manifest themselves in online news reporting practices is critical for both scholars and practitioners of news as they aim to understand what 'newsworthiness' means in the current, digital age. Findings from this study also enhance our current understandings of how the technological affordances of online and digital media platforms play a key role in shaping the kinds being produced and what information is being prioritized and highlighted in our contemporary news media environment. This is especially important in our current era where new mediums and technologies for news dissemination are continuously arising, and reorienting our understandings of what is considered ‘news'. As a key site of mass communication, discourse, and stories highlighted in the news do critical work in defining culture and ideology. Thus, better understanding the contours of news in our contemporary moment is critical in understanding cultural norms and meaning-making. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=content%20analysis" title="content analysis">content analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=ephemerality" title=" ephemerality"> ephemerality</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20communication" title=" mobile communication"> mobile communication</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20media%20news" title=" social media news"> social media news</a> </p> <a href="https://publications.waset.org/abstracts/109145/understanding-the-impact-of-ephemerality-and-mobility-on-social-media-news-a-content-analysis-of-news-on-snapchat" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/109145.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">4</span> Removal of Xylenol Orange and Eriochrome Black T Dyes from Aqueous Solution Using Chemically Activated Cocos nucifera and Mango Seed</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Padmesh%20Tirunelveli%20Narayanapillai">Padmesh Tirunelveli Narayanapillai</a>, <a href="https://publications.waset.org/abstracts/search?q=Joel%20Sharwinkumar"> Joel Sharwinkumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Gaitri%20Saravanan"> Gaitri Saravanan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The biosorption of Xylenol Orange (XO) and Eriochrome Black T (EBT) from aqueous solutions by chemically activated Cocos nucifera and mango seed as a low-cost, natural, and eco-friendly biosorbents was investigated. The study for biosorption of XO and EBT was optimized by different experimental parameters, initial pH 2–7, temperature 30–60 °C, biosorbent dosage 0.1 – 0.5 g, and XO: EBT dye proportions 0 – 100 by weight %. Physicochemical characteristic studies were conducted by Fourier Transform Infrared (FTIR). The equilibrium uptake was increased with an increase in the initial dye concentrations in the solution. Biosorption kinetic data were properly fitted with the pseudo-second-order kinetic model. The experimental isotherms data were analyzed using Langmuir, Freundlich, Redlich-Peterson, and Toth isotherm equations. Thermodynamic parameters ∆Go, ∆Ho, and ∆So were calculated indicating that the biosorption of Xo and EBT dye is a spontaneous and endothermic process. The Langmuir model gave the best fit by higher correlation coefficient (R2 =0.9971) for both biosorbents at optimum circumstances as pH 3, temperature 30°C, dosage 0.5 g for chemically activated Cocos nucifera and 0.4 g for chemically activated mango seeds it assumes as monolayer adsorption. The maximum dye removal efficiency was determined as 79.75% with chemically activated mango seeds compared to chemically activated Cocos nucifera. In summary, this research work showed that chemically modified activated mango seed can be effectively used as a promising low-cost biosorbent for the removal of different XO and EBT mixed dye combinations from aqueous solutions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mixed%20dye%20proportions" title="mixed dye proportions">mixed dye proportions</a>, <a href="https://publications.waset.org/abstracts/search?q=xylenol%20orange%20and%20eriochrome%20black%20t" title=" xylenol orange and eriochrome black t"> xylenol orange and eriochrome black t</a>, <a href="https://publications.waset.org/abstracts/search?q=chemically%20activated%20cocos%20nucifera%20and%20mango%20seed" title=" chemically activated cocos nucifera and mango seed"> chemically activated cocos nucifera and mango seed</a>, <a href="https://publications.waset.org/abstracts/search?q=kinetic" title=" kinetic"> kinetic</a>, <a href="https://publications.waset.org/abstracts/search?q=isotherm%20and%20thermodynamic%20studies" title=" isotherm and thermodynamic studies"> isotherm and thermodynamic studies</a>, <a href="https://publications.waset.org/abstracts/search?q=FTIR" title=" FTIR"> FTIR</a> </p> <a href="https://publications.waset.org/abstracts/169805/removal-of-xylenol-orange-and-eriochrome-black-t-dyes-from-aqueous-solution-using-chemically-activated-cocos-nucifera-and-mango-seed" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/169805.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">71</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">3</span> Clathrate Hydrate Measurements and Thermodynamic Modelling for Refrigerants with Electrolytes Solution in the Presence of Cyclopentane</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Peterson%20Thokozani%20Ngema">Peterson Thokozani Ngema</a>, <a href="https://publications.waset.org/abstracts/search?q=Paramespri%20Naidoo"> Paramespri Naidoo</a>, <a href="https://publications.waset.org/abstracts/search?q=Amir%20H.%20Mohammadi"> Amir H. Mohammadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Deresh%20Ramjugernath"> Deresh Ramjugernath</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phase equilibrium data (dissociation data) for clathrate hydrate (gas hydrate) were undertaken for systems involving fluorinated refrigerants with a single and mixed electrolytes (NaCl, CaCl₂, MgCl₂, and Na₂SO₄) aqueous solution at various salt concentrations in the absence and presence of cyclopentane (CP). The ternary systems for (R410a or R507) with the water system in the presence of CP were performed in the temperature and pressures ranges of (279.8 to 294.4) K and (0.158 to 1.385) MPa, respectively. Measurements for R410a with single electrolyte {NaCl or CaCl₂} solution in the presence of CP were undertaken at salt concentrations of (0.10, 0.15 and 0.20) mass fractions in the temperature and pressure ranges of (278.4 to 293.7) K and (0.214 to1.179) MPa, respectively. The temperature and pressure conditions for R410a with Na₂SO₄ aqueous solution system were investigated at a salt concentration of 0.10 mass fraction in the range of (283.3 to 291.6) K and (0.483 to 1.373) MPa respectively. Measurements for {R410a or R507} with mixed electrolytes {NaCl, CaCl₂, MgCl₂} aqueous solution was undertaken at various salt concentrations of (0.002 to 0.15) mass fractions in the temperature and pressure ranges of (274.5 to 292.9) K and (0.149 to1.119) MPa in the absence and presence of CP, in which there is no published data related to mixed salt and a promoter. The phase equilibrium measurements were performed using a non-visual isochoric equilibrium cell that co-operates the pressure-search technique. This study is focused on obtaining equilibrium data that can be utilized to design and optimize industrial wastewater, desalination process and the development of Hydrate Electrolyte–Cubic Plus Association (HE–CPA) Equation of State. The results show an impressive improvement in the presence of promoter (CP) on hydrate formation because it increases the dissociation temperatures near ambient conditions. The results obtained were modeled using a developed HE–CPA equation of state. The model results strongly agree with the measured hydrate dissociation data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=association" title="association">association</a>, <a href="https://publications.waset.org/abstracts/search?q=desalination" title=" desalination"> desalination</a>, <a href="https://publications.waset.org/abstracts/search?q=electrolytes" title=" electrolytes"> electrolytes</a>, <a href="https://publications.waset.org/abstracts/search?q=promoter" title=" promoter"> promoter</a> </p> <a href="https://publications.waset.org/abstracts/89032/clathrate-hydrate-measurements-and-thermodynamic-modelling-for-refrigerants-with-electrolytes-solution-in-the-presence-of-cyclopentane" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89032.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">245</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">2</span> Modeling and Analysis of Drilling Operation in Shale Reservoirs with Introduction of an Optimization Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sina%20Kazemi">Sina Kazemi</a>, <a href="https://publications.waset.org/abstracts/search?q=Farshid%20Torabi"> Farshid Torabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Todd%20Peterson"> Todd Peterson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Drilling in shale formations is frequently time-consuming, challenging, and fraught with mechanical failures such as stuck pipes or hole packing off when the cutting removal rate is not sufficient to clean the bottom hole. Crossing the heavy oil shale and sand reservoirs with active shale and microfractures is generally associated with severe fluid losses causing a reduction in the rate of the cuttings removal. These circumstances compromise a well’s integrity and result in a lower rate of penetration (ROP). This study presents collective results of field studies and theoretical analysis conducted on data from South Pars and North Dome in an Iran-Qatar offshore field. Solutions to complications related to drilling in shale formations are proposed through systemically analyzing and applying modeling techniques to select field mud logging data. Field data measurements during actual drilling operations indicate that in a shale formation where the return flow of polymer mud was almost lost in the upper dolomite layer, the performance of hole cleaning and ROP progressively change when higher string rotations are initiated. Likewise, it was observed that this effect minimized the force of rotational torque and improved well integrity in the subsequent casing running. Given similar geologic conditions and drilling operations in reservoirs targeting shale as the producing zone like the Bakken formation within the Williston Basin and Lloydminster, Saskatchewan, a drill bench dynamic modeling simulation was used to simulate borehole cleaning efficiency and mud optimization. The results obtained by altering RPM (string revolution per minute) at the same pump rate and optimized mud properties exhibit a positive correlation with field measurements. The field investigation and developed model in this report show that increasing the speed of string revolution as far as geomechanics and drilling bit conditions permit can minimize the risk of mechanically stuck pipes while reaching a higher than expected ROP in shale formations. Data obtained from modeling and field data analysis, optimized drilling parameters, and hole cleaning procedures are suggested for minimizing the risk of a hole packing off and enhancing well integrity in shale reservoirs. Whereas optimization of ROP at a lower pump rate maintains the wellbore stability, it saves time for the operator while reducing carbon emissions and fatigue of mud motors and power supply engines. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ROP" title="ROP">ROP</a>, <a href="https://publications.waset.org/abstracts/search?q=circulating%20density" title=" circulating density"> circulating density</a>, <a href="https://publications.waset.org/abstracts/search?q=drilling%20parameters" title=" drilling parameters"> drilling parameters</a>, <a href="https://publications.waset.org/abstracts/search?q=return%20flow" title=" return flow"> return flow</a>, <a href="https://publications.waset.org/abstracts/search?q=shale%20reservoir" title=" shale reservoir"> shale reservoir</a>, <a href="https://publications.waset.org/abstracts/search?q=well%20integrity" title=" well integrity"> well integrity</a> </p> <a href="https://publications.waset.org/abstracts/154878/modeling-and-analysis-of-drilling-operation-in-shale-reservoirs-with-introduction-of-an-optimization-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/154878.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">86</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">1</span> Differential Expression Analysis of Busseola fusca Larval Transcriptome in Response to Cry1Ab Toxin Challenge</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bianca%20Peterson">Bianca Peterson</a>, <a href="https://publications.waset.org/abstracts/search?q=Tomasz%20J.%20Sa%C5%84ko"> Tomasz J. Sańko</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20C.%20Bezuidenhout"> Carlos C. Bezuidenhout</a>, <a href="https://publications.waset.org/abstracts/search?q=Johnnie%20Van%20Den%20Berg"> Johnnie Van Den Berg</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Busseola fusca (Fuller) (Lepidoptera: Noctuidae), the maize stem borer, is a major pest in sub-Saharan Africa. It causes economic damage to maize and sorghum crops and has evolved non-recessive resistance to genetically modified (GM) maize expressing the Cry1Ab insecticidal toxin. Since B. fusca is a non-model organism, very little genomic information is publicly available, and is limited to some cytochrome c oxidase I, cytochrome b, and microsatellite data. The biology of B. fusca is well-described, but still poorly understood. This, in combination with its larval-specific behavior, may pose problems for limiting the spread of current resistant B. fusca populations or preventing resistance evolution in other susceptible populations. As part of on-going research into resistance evolution, B. fusca larvae were collected from Bt and non-Bt maize in South Africa, followed by RNA isolation (15 specimens) and sequencing on the Illumina HiSeq 2500 platform. Quality of reads was assessed with FastQC, after which Trimmomatic was used to trim adapters and remove low quality, short reads. Trinity was used for the de novo assembly, whereas TransRate was used for assembly quality assessment. Transcript identification employed BLAST (BLASTn, BLASTp, and tBLASTx comparisons), for which two libraries (nucleotide and protein) were created from 3.27 million lepidopteran sequences. Several transcripts that have previously been implicated in Cry toxin resistance was identified for B. fusca. These included aminopeptidase N, cadherin, alkaline phosphatase, ATP-binding cassette transporter proteins, and mitogen-activated protein kinase. MEGA7 was used to align these transcripts to reference sequences from Lepidoptera to detect mutations that might potentially be contributing to Cry toxin resistance in this pest. RSEM and Bioconductor were used to perform differential gene expression analysis on groups of B. fusca larvae challenged and unchallenged with the Cry1Ab toxin. Pairwise expression comparisons of transcripts that were at least 16-fold expressed at a false-discovery corrected statistical significance (p) ≤ 0.001 were extracted and visualized in a hierarchically clustered heatmap using R. A total of 329,194 transcripts with an N50 of 1,019 bp were generated from the over 167.5 million high-quality paired-end reads. Furthermore, 110 transcripts were over 10 kbp long, of which the largest one was 29,395 bp. BLAST comparisons resulted in identification of 157,099 (47.72%) transcripts, among which only 3,718 (2.37%) were identified as Cry toxin receptors from lepidopteran insects. According to transcript expression profiles, transcripts were grouped into three subclusters according to the similarity of their expression patterns. Several immune-related transcripts (pathogen recognition receptors, antimicrobial peptides, and inhibitors) were up-regulated in the larvae feeding on Bt maize, indicating an enhanced immune status in response to toxin exposure. Above all, extremely up-regulated arylphorin genes suggest that enhanced epithelial healing is one of the resistance mechanisms employed by B. fusca larvae against the Cry1Ab toxin. This study is the first to provide a resource base and some insights into a potential mechanism of Cry1Ab toxin resistance in B. fusca. Transcriptomic data generated in this study allows identification of genes that can be targeted by biotechnological improvements of GM crops. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=epithelial%20healing" title="epithelial healing">epithelial healing</a>, <a href="https://publications.waset.org/abstracts/search?q=Lepidoptera" title=" Lepidoptera"> Lepidoptera</a>, <a href="https://publications.waset.org/abstracts/search?q=resistance" title=" resistance"> resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=transcriptome" title=" transcriptome"> transcriptome</a> </p> <a href="https://publications.waset.org/abstracts/71571/differential-expression-analysis-of-busseola-fusca-larval-transcriptome-in-response-to-cry1ab-toxin-challenge" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71571.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">203</span> </span> </div> </div> </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 href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Account <li><a href="https://waset.org/profile">My Account</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Explore <li><a href="https://waset.org/disciplines">Disciplines</a></li> <li><a href="https://waset.org/conferences">Conferences</a></li> <li><a href="https://waset.org/conference-programs">Conference Program</a></li> <li><a href="https://waset.org/committees">Committees</a></li> <li><a href="https://publications.waset.org">Publications</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Research <li><a href="https://publications.waset.org/abstracts">Abstracts</a></li> <li><a href="https://publications.waset.org">Periodicals</a></li> <li><a href="https://publications.waset.org/archive">Archive</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Open Science <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Open-Science-Philosophy.pdf">Open Science Philosophy</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Open-Science-Award.pdf">Open Science Award</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Open-Society-Open-Science-and-Open-Innovation.pdf">Open Innovation</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Postdoctoral-Fellowship-Award.pdf">Postdoctoral Fellowship Award</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Scholarly-Research-Review.pdf">Scholarly Research Review</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Support <li><a href="https://waset.org/page/support">Support</a></li> <li><a href="https://waset.org/profile/messages/create">Contact Us</a></li> <li><a href="https://waset.org/profile/messages/create">Report Abuse</a></li> </ul> </div> </div> </div> </div> </div> <div class="container text-center"> <hr style="margin-top:0;margin-bottom:.3rem;"> <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" class="text-muted small">Creative Commons Attribution 4.0 International License</a> <div id="copy" class="mt-2">© 2024 World Academy of Science, Engineering and Technology</div> </div> </footer> <a href="javascript:" id="return-to-top"><i class="fas fa-arrow-up"></i></a> <div class="modal" id="modal-template"> <div class="modal-dialog"> <div class="modal-content"> <div class="row m-0 mt-1"> <div class="col-md-12"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> </div> </div> <div class="modal-body"></div> </div> </div> </div> <script src="https://cdn.waset.org/static/plugins/jquery-3.3.1.min.js"></script> <script src="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/js/bootstrap.bundle.min.js"></script> <script src="https://cdn.waset.org/static/js/site.js?v=150220211556"></script> <script> jQuery(document).ready(function() { /*jQuery.get("https://publications.waset.org/xhr/user-menu", function (response) { jQuery('#mainNavMenu').append(response); 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