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determination</title> <meta name="description" content="Search results for: simultaneous determination"> <meta name="keywords" content="simultaneous determination"> <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 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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="simultaneous determination"> <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> 2542</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: simultaneous determination</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2542</span> Spectral Analysis Approaches for Simultaneous Determination of Binary Mixtures with Overlapping Spectra: An Application on Pseudoephedrine Sulphate and Loratadine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sara%20El-Hanboushy">Sara El-Hanboushy</a>, <a href="https://publications.waset.org/abstracts/search?q=Hayam%20Lotfy"> Hayam Lotfy</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmin%20Fayez"> Yasmin Fayez</a>, <a href="https://publications.waset.org/abstracts/search?q=Engy%20Shokry"> Engy Shokry</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20%20Abdelkawy"> Mohammed Abdelkawy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Simple, speciﬁc, accurate and precise spectrophotometric methods are developed and validated for simultaneous determination of pseudoephedrine sulphate (PSE) and loratadine (LOR) in combined dosage form based on spectral analysis technique. Pseudoephedrine (PSE) in binary mixture could be analyzed either by using its resolved zero order absorption spectrum at its λ max 256.8 nm after subtraction of LOR spectrum or in presence of LOR spectrum by absorption correction method at 256.8 nm, dual wavelength (DWL) method at 254nm and 273nm, induced dual wavelength (IDWL) method at 256nm and 272nm and ratio difference (RD) method at 256nm and 262 nm. Loratadine (LOR) in the mixture could be analyzed directly at 280nm without any interference of PSE spectrum or at 250 nm using its recovered zero order absorption spectrum using constant multiplication(CM).In addition, simultaneous determination for PSE and LOR in their mixture could be applied by induced amplitude modulation method (IAM) coupled with amplitude multiplication (PM). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dual%20wavelength%20%28DW%29" title="dual wavelength (DW)">dual wavelength (DW)</a>, <a href="https://publications.waset.org/abstracts/search?q=induced%20amplitude%20modulation%20method%20%28IAM%29%20coupled%20with%20amplitude%20multiplication%20%28PM%29" title=" induced amplitude modulation method (IAM) coupled with amplitude multiplication (PM)"> induced amplitude modulation method (IAM) coupled with amplitude multiplication (PM)</a>, <a href="https://publications.waset.org/abstracts/search?q=loratadine" title=" loratadine"> loratadine</a>, <a href="https://publications.waset.org/abstracts/search?q=pseudoephedrine%20sulphate" title=" pseudoephedrine sulphate"> pseudoephedrine sulphate</a>, <a href="https://publications.waset.org/abstracts/search?q=ratio%20difference%20%28RD%29" title=" ratio difference (RD)"> ratio difference (RD)</a> </p> <a href="https://publications.waset.org/abstracts/53587/spectral-analysis-approaches-for-simultaneous-determination-of-binary-mixtures-with-overlapping-spectra-an-application-on-pseudoephedrine-sulphate-and-loratadine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53587.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">2541</span> Simultaneous Determination of Methotrexate and Aspirin Using Fourier Transform Convolution Emission Data under Non-Parametric Linear Regression Method </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marwa%20A.%20A.%20Ragab">Marwa A. A. Ragab</a>, <a href="https://publications.waset.org/abstracts/search?q=Hadir%20M.%20Maher"> Hadir M. Maher</a>, <a href="https://publications.waset.org/abstracts/search?q=Eman%20I.%20El-Kimary"> Eman I. El-Kimary</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Co-administration of methotrexate (MTX) and aspirin (ASP) can cause a pharmacokinetic interaction and a subsequent increase in blood MTX concentrations which may increase the risk of MTX toxicity. Therefore, it is important to develop a sensitive, selective, accurate and precise method for their simultaneous determination in urine. A new hybrid chemometric method has been applied to the emission response data of the two drugs. Spectrofluorimetric method for determination of MTX through measurement of its acid-degradation product, 4-amino-4-deoxy-10-methylpteroic acid (4-AMP), was developed. Moreover, the acid-catalyzed degradation reaction enables the spectrofluorimetric determination of ASP through the formation of its active metabolite salicylic acid (SA). The proposed chemometric method deals with convolution of emission data using 8-points sin xi polynomials (discrete Fourier functions) after the derivative treatment of these emission data. The first and second derivative curves (D1 & D2) were obtained first then convolution of these curves was done to obtain first and second derivative under Fourier functions curves (D1/FF) and (D2/FF). This new application was used for the resolution of the overlapped emission bands of the degradation products of both drugs to allow their simultaneous indirect determination in human urine. Not only this chemometric approach was applied to the emission data but also the obtained data were subjected to non-parametric linear regression analysis (Theil’s method). The proposed method was fully validated according to the ICH guidelines and it yielded linearity ranges as follows: 0.05-0.75 and 0.5-2.5 µg mL-1 for MTX and ASP respectively. It was found that the non-parametric method was superior over the parametric one in the simultaneous determination of MTX and ASP after the chemometric treatment of the emission spectra of their degradation products. The work combines the advantages of derivative and convolution using discrete Fourier function together with the reliability and efficacy of the non-parametric analysis of data. The achieved sensitivity along with the low values of LOD (0.01 and 0.06 µg mL-1) and LOQ (0.04 and 0.2 µg mL-1) for MTX and ASP respectively, by the second derivative under Fourier functions (D2/FF) were promising and guarantee its application for monitoring the two drugs in patients’ urine samples. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chemometrics" title="chemometrics">chemometrics</a>, <a href="https://publications.waset.org/abstracts/search?q=emission%20curves" title=" emission curves"> emission curves</a>, <a href="https://publications.waset.org/abstracts/search?q=derivative" title=" derivative"> derivative</a>, <a href="https://publications.waset.org/abstracts/search?q=convolution" title=" convolution"> convolution</a>, <a href="https://publications.waset.org/abstracts/search?q=Fourier%20transform" title=" Fourier transform"> Fourier transform</a>, <a href="https://publications.waset.org/abstracts/search?q=human%20urine" title=" human urine"> human urine</a>, <a href="https://publications.waset.org/abstracts/search?q=non-parametric%20regression" title=" non-parametric regression"> non-parametric regression</a>, <a href="https://publications.waset.org/abstracts/search?q=Theil%E2%80%99s%20method" title=" Theil’s method"> Theil’s method</a> </p> <a href="https://publications.waset.org/abstracts/15024/simultaneous-determination-of-methotrexate-and-aspirin-using-fourier-transform-convolution-emission-data-under-non-parametric-linear-regression-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15024.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">430</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">2540</span> Simultaneous Determination of Some Phenolic Pesticides in Environmental and Biological Samples</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yasmeen%20F.%20Pervez">Yasmeen F. Pervez</a>, <a href="https://publications.waset.org/abstracts/search?q=Etesh%20K.%20Janghel"> Etesh K. Janghel</a>, <a href="https://publications.waset.org/abstracts/search?q=Santosh%20Kumar%20Sar"> Santosh Kumar Sar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Simple and sensitive analytical thermal gradient-thin layer chromatography technique has been developed for the simultaneous determination of phenolic pesticides like carbaryl, propoxur and carbofuran. It is based on the differential migration of colored derivatives formed by the reaction of hydrolysed phenolic compound with diazotized 3, 4 dimethyl aniline on a silica gel plate. Quantitative evaluation of hydrolyzed phenolic compound is made by visual comparison of intensities of color by spectrophotometry. The color system obeys Beer’s law in the following working range in ppm : carbaryl, 0.5-6.6; propoxur, 0.8-7.2; and carbofuran, 0.2-3.3 respectively. The Molar absorptivity, Sandell’s sensitivity, Correlation coefficient have been determined. The effects of analytical parameters on migration and analysis have been evaluated. The methods are highly reproducible and have been successfully applied to determination of phenolic pesticides in environmental and biological samples. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=phenolic%20pesticides%20%28carbaryl" title="phenolic pesticides (carbaryl">phenolic pesticides (carbaryl</a>, <a href="https://publications.waset.org/abstracts/search?q=propoxur%20and%20carbofuran%29" title=" propoxur and carbofuran)"> propoxur and carbofuran)</a>, <a href="https://publications.waset.org/abstracts/search?q=3.4%20dimethyl%20aniline" title=" 3.4 dimethyl aniline"> 3.4 dimethyl aniline</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental" title=" environmental"> environmental</a>, <a href="https://publications.waset.org/abstracts/search?q=biological%20samples" title=" biological samples"> biological samples</a> </p> <a href="https://publications.waset.org/abstracts/22981/simultaneous-determination-of-some-phenolic-pesticides-in-environmental-and-biological-samples" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22981.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">405</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">2539</span> An UHPLC (Ultra High Performance Liquid Chromatography) Method for the Simultaneous Determination of Norfloxacin, Metronidazole, and Tinidazole Using Monolithic Column-Stability Indicating Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asmaa%20Mandour">Asmaa Mandour</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramzia%20El-Bagary"> Ramzia El-Bagary</a>, <a href="https://publications.waset.org/abstracts/search?q=Asmaa%20El-Zaher"> Asmaa El-Zaher</a>, <a href="https://publications.waset.org/abstracts/search?q=Ehab%20Elkady"> Ehab Elkady</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: An UHPLC (ultra high performance liquid chromatography) method for the simultaneous determination of norfloxacin (NOR), metronidazole (MET) and tinidazole (TNZ) using monolithic column is presented. Purpose: The method is considered an environmentally friendly method with relatively low organic composition of the mobile phase. Methods: The chromatographic separation was performed using Phenomenex® Onyex Monolithic C18 (50mmx 20mm) column. An elution program of mobile phase consisted of 0.5% aqueous phosphoric acid : methanol (85:15, v/v). Where elution of all drugs was completed within 3.5 min with 1µL injection volume. The UHPLC method was applied for the stability indication of NOR in the presence of its acid degradation product ND. Results: Retention times were 0.69, 1.19 and 3.23 min for MET, TNZ and NOR, respectively. While ND retention time was 1.06 min. Linearity, accuracy, and precision were acceptable over the concentration range of 5-50µg mL-1for all drugs. Conclusions: The method is simple, sensitive and suitable for the routine quality control and dosage form assay of the three drugs and can also be used for the stability indication of NOR in the presence of its acid degradation product. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antibacterial" title="antibacterial">antibacterial</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20cilumn" title=" monolithic cilumn"> monolithic cilumn</a>, <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20determination" title=" simultaneous determination"> simultaneous determination</a>, <a href="https://publications.waset.org/abstracts/search?q=UHPLC" title=" UHPLC"> UHPLC</a> </p> <a href="https://publications.waset.org/abstracts/52684/an-uhplc-ultra-high-performance-liquid-chromatography-method-for-the-simultaneous-determination-of-norfloxacin-metronidazole-and-tinidazole-using-monolithic-column-stability-indicating-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52684.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">253</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">2538</span> Simultaneous Determination of Proposed Anti-HIV Combination Comprising of Elvitegravir and Quercetin in Rat Plasma Using the HPLC–ESI-MS/MS Method: Drug Interaction Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lubna%20Azmi">Lubna Azmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ila%20Shukla"> Ila Shukla</a>, <a href="https://publications.waset.org/abstracts/search?q=Shyam%20Sundar%20Gupta"> Shyam Sundar Gupta</a>, <a href="https://publications.waset.org/abstracts/search?q=Padam%20Kant"> Padam Kant</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20V.%20Rao"> C. V. Rao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Elvitegravir is the mainstay of anti-HIV combination therapy in most endemic countries presently. However, it cannot be used alone owing to its long onset time of action. 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxychromen-4-one (Quercetin: QU) is a polyphenolic compound obtained from Argeria speciosa Linn (Family: Convolvulaceae), an anti-HIV candidate. In the present study, a sensitive, simple and rapid high-performance liquid chromatography coupled with positive ion electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) method was developed for the simultaneous determination elvitegravir and Quercetin, in rat plasma. The method was linear over a range of 0.2–500 ng/ml. All validation parameters met the acceptance criteria according to regulatory guidelines. LC–MS/MS method for determination of Elvitegravir and Quercetin was developed and validated. Results show the potential of drug–drug interaction upon co-administration this marketed drugs and plant derived secondary metabolite. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anti-HIV%20resistance" title="anti-HIV resistance">anti-HIV resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=extraction" title=" extraction"> extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=HPLC-ESI-MS-MS" title=" HPLC-ESI-MS-MS"> HPLC-ESI-MS-MS</a>, <a href="https://publications.waset.org/abstracts/search?q=validation" title=" validation"> validation</a> </p> <a href="https://publications.waset.org/abstracts/63318/simultaneous-determination-of-proposed-anti-hiv-combination-comprising-of-elvitegravir-and-quercetin-in-rat-plasma-using-the-hplc-esi-msms-method-drug-interaction-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63318.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">344</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2537</span> Electrochemically Reduced Graphene Oxide Modified Boron-Doped Diamond Paste Electrode on Paper-Based Analytical Device for Simultaneous Determination of Norepinephrine and Serotonin</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Siriwan%20Nantaphol">Siriwan Nantaphol</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20B.%20Channon"> Robert B. Channon</a>, <a href="https://publications.waset.org/abstracts/search?q=Takeshi%20Kondo"> Takeshi Kondo</a>, <a href="https://publications.waset.org/abstracts/search?q=Weena%20Siangproh"> Weena Siangproh</a>, <a href="https://publications.waset.org/abstracts/search?q=Orawon%20Chailapakul"> Orawon Chailapakul</a>, <a href="https://publications.waset.org/abstracts/search?q=Charles%20S.%20Henry"> Charles S. Henry</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, we demonstrate a novel electrochemically reduced graphene oxide (ERGO) modified boron-doped diamond paste (BDDP) electrode on paper-based analytical devices (PADs) for simultaneous determination of norepinephrine (NE) and serotonin (5-HT). The BDD paste electrode was easily constructed by filling BDD paste in small channels, which made in transparency film sheets using a CO₂ laser etching  system. The counter and reference electrodes were fabricated on paper by in-house screen-printing and then combined with BDD paste microelectrode. The electrochemical characterization of the device was investigated by cyclic voltammetry (CV). Differential pulse voltammetry (DPV) was employed for the simultaneous determination of NE and 5-HT. The ERGO-modified BDDP electrode displayed excellent electrocatalytic activities toward the oxidation of NE and 5-HT and strong function for resolving the overlapping voltammetric responses of NE and 5-HT into two well-defined voltammetric peaks. This device was capable of simultaneously detecting NE and 5-HT in wide concentration ranges and with a low limit of detections. In addition, it has the advantages in terms of ease of use, low cost, and disposability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=boron-doped%20diamond%20paste%20electrode" title="boron-doped diamond paste electrode">boron-doped diamond paste electrode</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemically%20reduced%20graphene%20oxide" title=" electrochemically reduced graphene oxide"> electrochemically reduced graphene oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=norepinephrine" title=" norepinephrine"> norepinephrine</a>, <a href="https://publications.waset.org/abstracts/search?q=paper-based%20analytical%20device" title=" paper-based analytical device"> paper-based analytical device</a>, <a href="https://publications.waset.org/abstracts/search?q=serotonin" title=" serotonin"> serotonin</a> </p> <a href="https://publications.waset.org/abstracts/67753/electrochemically-reduced-graphene-oxide-modified-boron-doped-diamond-paste-electrode-on-paper-based-analytical-device-for-simultaneous-determination-of-norepinephrine-and-serotonin" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/67753.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">259</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">2536</span> Disposable PANI-CeO2 Sensor for the Electrocatalytic Simultaneous Quantification of Amlodipine and Nebivolol </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nimisha%20Jadon">Nimisha Jadon</a>, <a href="https://publications.waset.org/abstracts/search?q=Rajeev%20Jain"> Rajeev Jain</a>, <a href="https://publications.waset.org/abstracts/search?q=Swati%20Sharma"> Swati Sharma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A chemically modified carbon paste sensor has been developed for the simultaneous determination of amlodipine (AML) and nebivolol (NBV). Carbon paste electrode (CPE) was fabricated by the addition of Gr/PANI-CeO2. Gr/PANI-CeO2/CPE has achieved excellent electrocatalytic activity and sensitivity. AML and NBV exhibited oxidation peaks at 0.70 and 0.90 V respectively on Gr/ PANI-CeO2/CPE. The linearity range of AML and NBV was 0.1 to 1.6 μgmL-1 in BR buffer (pH 8.0). The Limit of detection (LOD) was 20.0 ngmL-1 for AML and 30.0 ngmL-1 for NBV and limit of quantification (LOQ) was 80.0 ngmL-1 for AML and 100 ngmL-1 for NBV respectively. These analyses were also determined in pharmaceutical formulation and human serum and good recovery was obtained for the developed method. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=amlodipine" title="amlodipine">amlodipine</a>, <a href="https://publications.waset.org/abstracts/search?q=nebivolol" title=" nebivolol"> nebivolol</a>, <a href="https://publications.waset.org/abstracts/search?q=square%20wave%20voltammetry" title=" square wave voltammetry"> square wave voltammetry</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20paste%20electrode" title=" carbon paste electrode"> carbon paste electrode</a>, <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20quantification" title=" simultaneous quantification"> simultaneous quantification</a> </p> <a href="https://publications.waset.org/abstracts/80595/disposable-pani-ceo2-sensor-for-the-electrocatalytic-simultaneous-quantification-of-amlodipine-and-nebivolol" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80595.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">354</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">2535</span> Synthesis of Pd@ Cu Core−Shell Nanowires by Galvanic Displacement of Cu by Pd²⁺ Ions as a Modified Glassy Carbon Electrode for the Simultaneous Determination of Dihydroxybenzene Isomers Speciation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Majid%20Farsadrouh%20Rashti">Majid Farsadrouh Rashti</a>, <a href="https://publications.waset.org/abstracts/search?q=Parisa%20Jahani"> Parisa Jahani</a>, <a href="https://publications.waset.org/abstracts/search?q=Amir%20Shafiee"> Amir Shafiee</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehrdad%20Mofidi"> Mehrdad Mofidi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The dihydroxybenzene isomers, hydroquinone (HQ), catechol (CC) and resorcinol (RS) have been widely recognized as important environmental pollutants due to their toxicity and low degradability in the ecological environment. Speciation of HQ, CC and RS is very important for environmental analysis because they co-exist of these isomers in environmental samples and are too difficult to degrade as an environmental contaminant with high toxicity. There are many analytical methods have been reported for detecting these isomers, such as spectrophotometry, fluorescence, High-performance liquid chromatography (HPLC) and electrochemical methods. These methods have attractive advantages such as simple and fast response, low maintenance costs, wide linear analysis range, high efficiency, excellent selectivity and high sensitivity. A novel modified glassy carbon electrode (GCE) with Pd@ Cu/CNTs core−shell nanowires for the simultaneous determination of hydroquinone (HQ), catechol (CC) and resorcinol (RS) is described. A detailed investigation by field emission scanning electron microscopy and electrochemistry was performed in order to elucidate the preparation process and properties of the GCE/ Pd/CuNWs-CNTs. The electrochemical response characteristic of the modified GPE/LFOR toward HQ, CC and RS were investigated by cyclic voltammetry, differential pulse voltammetry (DPV) and Chronoamperometry. Under optimum conditions, the calibrations curves were linear up to 228 µM for each with detection limits of 0.4, 0.6 and 0.8 µM for HQ, CC and RS, respectively. The diffusion coefficient for the oxidation of HQ, CC and RS at the modified electrode was calculated as 6.5×10⁻⁵, 1.6 ×10⁻⁵ and 8.5 ×10⁻⁵ cm² s⁻¹, respectively. DPV was used for the simultaneous determination of HQ, CC and RS at the modified electrode and the relative standard deviations were 2.1%, 1.9% and 1.7% for HQ, CC and RS, respectively. Moreover, GCE/Pd/CuNWs-CNTs was successfully used for determination of HQ, CC and RS in real samples. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dihydroxybenzene%20isomers" title="dihydroxybenzene isomers">dihydroxybenzene isomers</a>, <a href="https://publications.waset.org/abstracts/search?q=galvanized%20copper%20nanowires" title=" galvanized copper nanowires"> galvanized copper nanowires</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20sensor" title=" electrochemical sensor"> electrochemical sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=Palladium" title=" Palladium"> Palladium</a>, <a href="https://publications.waset.org/abstracts/search?q=speciation" title=" speciation"> speciation</a> </p> <a href="https://publications.waset.org/abstracts/96527/synthesis-of-pd-at-cu-coreshell-nanowires-by-galvanic-displacement-of-cu-by-pd2-ions-as-a-modified-glassy-carbon-electrode-for-the-simultaneous-determination-of-dihydroxybenzene-isomers-speciation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96527.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">128</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">2534</span> Sensitive Electrochemical Sensor for Simultaneous Detection of Endocrine Disruptors, Bisphenol A and 4- Nitrophenol Using La₂Cu₂O₅ Modified Glassy Carbon Electrode</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20B.%20Mayil%20Vealan">S. B. Mayil Vealan</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Sekar"> C. Sekar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Bisphenol A (BIS A) and 4 Nitrophenol (4N) are the most prevalent environmental endocrine-disrupting chemicals which mimic hormones and have a direct relationship to the development and growth of animal and human reproductive systems. Moreover, intensive exposure to the compound is related to prostate and breast cancer, infertility, obesity, and diabetes. Hence, accurate and reliable determination techniques are crucial for preventing human exposure to these harmful chemicals. Lanthanum Copper Oxide (La₂Cu₂O₅) nanoparticles were synthesized and investigated through various techniques such as scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy. Cyclic voltammetry and square wave voltammetry techniques are employed to evaluate the electrochemical behavior of as-synthesized samples toward the electrochemical detection of Bisphenol A and 4-Nitrophenol. Under the optimal conditions, the oxidation current increased linearly with increasing the concentration of BIS A and 4-N in the range of 0.01 to 600 μM with a detection limit of 2.44 nM and 3.8 nM. These are the lowest limits of detection and the widest linear ranges in the literature for this determination. The method was applied to the simultaneous determination of BIS A and 4-N in real samples (food packing materials and river water) with excellent recovery values ranging from 95% to 99%. Better stability, sensitivity, selectivity and reproducibility, fast response, and ease of preparation made the sensor well-suitable for the simultaneous determination of bisphenol and 4 Nitrophenol. To the best of our knowledge, this is the first report in which La₂Cu₂O₅ nano particles were used as efficient electron mediators for the fabrication of endocrine disruptor (BIS A and 4N) chemical sensors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=endocrine%20disruptors" title="endocrine disruptors">endocrine disruptors</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20sensor" title=" electrochemical sensor"> electrochemical sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=Food%20contacting%20materials" title=" Food contacting materials"> Food contacting materials</a>, <a href="https://publications.waset.org/abstracts/search?q=lanthanum%20cuprates" title=" lanthanum cuprates"> lanthanum cuprates</a>, <a href="https://publications.waset.org/abstracts/search?q=nanomaterials" title=" nanomaterials"> nanomaterials</a> </p> <a href="https://publications.waset.org/abstracts/162959/sensitive-electrochemical-sensor-for-simultaneous-detection-of-endocrine-disruptors-bisphenol-a-and-4-nitrophenol-using-la2cu2o5-modified-glassy-carbon-electrode" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162959.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">2533</span> Microwave Accelerated Simultaneous Distillation –Extraction: Preparative Recovery of Volatiles from Food Products</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ferhat%20Mohamed">Ferhat Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Boukhatem%20Mohamed%20Nadjib"> Boukhatem Mohamed Nadjib</a>, <a href="https://publications.waset.org/abstracts/search?q=Chemat%20Farid"> Chemat Farid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Simultaneous distillation–extraction (SDE) is routinely used by analysts for sample preparation prior to gas chromatography analysis. In this work, a new process design and operation for microwave assisted simultaneous distillation – solvent extraction (MW-SDE) of volatile compounds was developed. Using the proposed method, isolation, extraction and concentration of volatile compounds can be carried out in a single step. To demonstrate its feasibility, MW-SDE was compared with the conventional technique, Simultaneous distillation–extraction (SDE), for gas chromatography-mass spectrometry (GC-MS) analysis of volatile compounds in a fresh orange juice and a dry spice “carvi seeds”. SDE method required long time (3 h) to isolate the volatile compounds, and large amount of organic solvent (200 mL of hexane) for further extraction, while MW-SDE needed little time (only 30 min) to prepare sample, and less amount of organic solvent (10 mL of hexane). These results show that MW-SDE–GC-MS is a simple, rapid and solvent-less method for determination of volatile compounds from aromatic plants. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=essential%20oil" title="essential oil">essential oil</a>, <a href="https://publications.waset.org/abstracts/search?q=extraction" title=" extraction"> extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=distillation" title=" distillation"> distillation</a>, <a href="https://publications.waset.org/abstracts/search?q=carvi%20seeds" title=" carvi seeds"> carvi seeds</a> </p> <a href="https://publications.waset.org/abstracts/30977/microwave-accelerated-simultaneous-distillation-extraction-preparative-recovery-of-volatiles-from-food-products" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30977.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">560</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">2532</span> On Parameter Estimation of Simultaneous Linear Functional Relationship Model for Circular Variables</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20A.%20Mokhtar">N. A. Mokhtar</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20G.%20Hussin"> A. G. Hussin</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Z.%20Zubairi"> Y. Z. Zubairi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes a new simultaneous simple linear functional relationship model by assuming equal error variances. We derive the maximum likelihood estimate of the parameters in the simultaneous model and the covariance. We show by simulation study the small bias values of the parameters suggest the suitability of the estimation method. As an illustration, the proposed simultaneous model is applied to real data of the wind direction and wave direction measured by two different instruments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20linear%20functional%20relationship%20model" title="simultaneous linear functional relationship model">simultaneous linear functional relationship model</a>, <a href="https://publications.waset.org/abstracts/search?q=Fisher%20information%20matrix" title="Fisher information matrix">Fisher information matrix</a>, <a href="https://publications.waset.org/abstracts/search?q=parameter%20estimation" title=" parameter estimation"> parameter estimation</a>, <a href="https://publications.waset.org/abstracts/search?q=circular%20variables" title=" circular variables"> circular variables</a> </p> <a href="https://publications.waset.org/abstracts/44385/on-parameter-estimation-of-simultaneous-linear-functional-relationship-model-for-circular-variables" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44385.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">366</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2531</span> Spectrophotometric Methods for Simultaneous Determination of Binary Mixture of Amlodipine Besylate and Atenolol Based on Dual Wavelength</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nesrine%20T.%20Lamie">Nesrine T. Lamie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Four, accurate, precise, and sensitive spectrophotometric methods are developed for the simultaneous determination of a binary mixture containing amlodipine besylate (AM) and atenolol (AT) where AM is determined at its λmax 360 nm (0D), while atenolol can be determined by different methods. Method (A) is absorpotion factor (AFM). Method (B) is the new Ratio Difference method(RD) which measures the difference in amplitudes between 210 and 226 nm of ratio spectrum., Method (C) is novel constant center spectrophotometric method (CC) Method (D) is mean centering of the ratio spectra (MCR) at 284 nm. The calibration curve is linear over the concentration range of 10–80 and 4–40 μg/ml for AM and AT, respectively. These methods are tested by analyzing synthetic mixtures of the cited drugs and they are applied to their commercial pharmaceutical preparation. The validity of results was assessed by applying standard addition technique. The results obtained were found to agree statistically with those obtained by a reported method, showing no significant difference with respect to accuracy and precision. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=amlodipine" title="amlodipine">amlodipine</a>, <a href="https://publications.waset.org/abstracts/search?q=atenolol" title=" atenolol"> atenolol</a>, <a href="https://publications.waset.org/abstracts/search?q=absorption%20factor" title=" absorption factor"> absorption factor</a>, <a href="https://publications.waset.org/abstracts/search?q=constant%20center" title=" constant center"> constant center</a>, <a href="https://publications.waset.org/abstracts/search?q=mean%20centering" title=" mean centering"> mean centering</a>, <a href="https://publications.waset.org/abstracts/search?q=ratio%20difference" title=" ratio difference"> ratio difference</a> </p> <a href="https://publications.waset.org/abstracts/24767/spectrophotometric-methods-for-simultaneous-determination-of-binary-mixture-of-amlodipine-besylate-and-atenolol-based-on-dual-wavelength" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24767.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">304</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">2530</span> Development of Ecofriendly Ionic Liquid Modified Reverse Phase Liquid Chromatography Method for Simultaneous Determination of Anti-Hyperlipidemic Drugs </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hassan%20M.%20Albishri">Hassan M. Albishri</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatimah%20Al-Shehri"> Fatimah Al-Shehri</a>, <a href="https://publications.waset.org/abstracts/search?q=Deia%20Abd%20El-Hady"> Deia Abd El-Hady</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Among the analytical techniques, reverse phase liquid chromatography (RPLC) is currently used in pharmaceutical industry. Ecofriendly analytical chemistry offers the advantages of decreasing the environmental impact with the advantage of increasing operator safety which constituted a topic of industrial interest. Recently, ionic liquids have been successfully used to reduce or eliminate the conventional organic toxic solvents. In the current work, a simple and ecofriendly ionic liquid modified RPLC (IL-RPLC) method has been firstly developed and compared with RPLC under acidic and neutral mobile phase conditions for simultaneous determination of atorvastatin-calcium, rosuvastatin and simvastatin. Several chromatographic effective parameters have been changed in a systematic way. Adequate results have been achieved by mixing ILs with ethanol as a mobile phase under neutral conditions at 1 mL/min flow rate on C18 column. The developed IL-RPLC method has been validated for the quantitative determination of drugs in pharmaceutical formulations. The method showed excellent linearity for analytes in a wide range of concentrations with acceptable precise and accurate data. The current IL-RPLC technique could have vast applications particularly under neutral conditions for simple and greener (bio)analytical applications of pharmaceuticals. <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=RPLC" title=" RPLC"> RPLC</a>, <a href="https://publications.waset.org/abstracts/search?q=anti-hyperlipidemic%20drugs" title=" anti-hyperlipidemic drugs"> anti-hyperlipidemic drugs</a>, <a href="https://publications.waset.org/abstracts/search?q=ecofriendly" title=" ecofriendly"> ecofriendly</a> </p> <a href="https://publications.waset.org/abstracts/62016/development-of-ecofriendly-ionic-liquid-modified-reverse-phase-liquid-chromatography-method-for-simultaneous-determination-of-anti-hyperlipidemic-drugs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/62016.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">256</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">2529</span> Simultaneous Determination of Cefazolin and Cefotaxime in Urine by HPLC</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rafika%20Bibi">Rafika Bibi</a>, <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Khaladi"> Khaled Khaladi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hind%20Mokran"> Hind Mokran</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Salah%20Boukhechem"> Mohamed Salah Boukhechem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A high performance liquid chromatographic method with ultraviolet detection at 264nm was developed and validate for quantitative determination and separation of cefazolin and cefotaxime in urine, the mobile phase consisted of acetonitrile and phosphate buffer pH4,2(15 :85) (v/v) pumped through ODB 250× 4,6 mm, 5um column at a flow rate of 1ml/min, loop of 20ul. In this condition, the validation of this technique showed that it is linear in a range of 0,01 to 10ug/ml with a good correlation coefficient ( R>0,9997), retention time of cefotaxime, cefazolin was 9.0, 10.1 respectively, the statistical evaluation of the method was examined by means of within day (n=6) and day to day (n=5) and was found to be satisfactory with high accuracy and precision. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cefazolin" title="cefazolin">cefazolin</a>, <a href="https://publications.waset.org/abstracts/search?q=cefotaxime" title=" cefotaxime"> cefotaxime</a>, <a href="https://publications.waset.org/abstracts/search?q=HPLC" title=" HPLC"> HPLC</a>, <a href="https://publications.waset.org/abstracts/search?q=bioscience" title=" bioscience"> bioscience</a>, <a href="https://publications.waset.org/abstracts/search?q=biochemistry" title=" biochemistry"> biochemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=pharmaceutical" title=" pharmaceutical "> pharmaceutical </a> </p> <a href="https://publications.waset.org/abstracts/2548/simultaneous-determination-of-cefazolin-and-cefotaxime-in-urine-by-hplc" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2548.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">363</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">2528</span> Assessment of ATC with Shunt FACTS Devices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ashwani%20Kumar">Ashwani Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Jitender%20Kumar"> Jitender Kumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, an optimal power flow based approach has been applied for multi-transactions deregulated environment for ATC determination with SVC and STATCOM. The main contribution of the paper is (i) OPF based approach for evaluation of ATC with multi-transactions, (ii) ATC enhancement with FACTS devices viz. SVC and STATCOM for intact and line contingency cases, (iii) impact of ZIP load on ATC determination and comparison of ATC obtained with SVC and STATCOM. The results have been determined for intact and line contingency cases taking simultaneous as well as single transaction cases for IEEE 24 bus RTS. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=available%20transfer%20capability" title="available transfer capability">available transfer capability</a>, <a href="https://publications.waset.org/abstracts/search?q=FACTS%20devices" title=" FACTS devices"> FACTS devices</a>, <a href="https://publications.waset.org/abstracts/search?q=line%20contingency" title=" line contingency"> line contingency</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-transactions" title=" multi-transactions"> multi-transactions</a>, <a href="https://publications.waset.org/abstracts/search?q=ZIP%20load%20model" title=" ZIP load model"> ZIP load model</a> </p> <a href="https://publications.waset.org/abstracts/1583/assessment-of-atc-with-shunt-facts-devices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1583.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">600</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">2527</span> The Impact of Grammatical Differences on English-Mandarin Chinese Simultaneous Interpreting</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Miao%20Sabrina%20Wang">Miao Sabrina Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper examines the impact of grammatical differences on simultaneous interpreting from English into Mandarin Chinese by drawing upon an empirical study of professional and student interpreters. The research focuses on the effects of three grammatical categories including passives, adverbial components and noun phrases on simultaneous interpreting. For each category, interpretations of instances in which the grammatical structures are the same across the two languages are compared with interpretations of instances in which the grammatical structures differ across the two languages in terms of content accuracy and delivery appropriateness. The results indicate that grammatical differences have a significant impact on the interpreting performance of both professionals and students. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=content%20accuracy" title="content accuracy">content accuracy</a>, <a href="https://publications.waset.org/abstracts/search?q=delivery%20appropriateness" title=" delivery appropriateness"> delivery appropriateness</a>, <a href="https://publications.waset.org/abstracts/search?q=grammatical%20differences" title=" grammatical differences"> grammatical differences</a>, <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20interpreting" title=" simultaneous interpreting"> simultaneous interpreting</a> </p> <a href="https://publications.waset.org/abstracts/46375/the-impact-of-grammatical-differences-on-english-mandarin-chinese-simultaneous-interpreting" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46375.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">541</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">2526</span> Application of Refractometric Methodology for Simultaneous Determination of Alcohol and Residual Sugar Concentrations during Alcoholic Fermentation Bioprocess of Date Juice</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Boukhiar%20Aissa">Boukhiar Aissa</a>, <a href="https://publications.waset.org/abstracts/search?q=Halladj%20Fatima"> Halladj Fatima</a>, <a href="https://publications.waset.org/abstracts/search?q=Iguergaziz%20Nadia"> Iguergaziz Nadia</a>, <a href="https://publications.waset.org/abstracts/search?q=Lamrani%20yasmina"> Lamrani yasmina</a>, <a href="https://publications.waset.org/abstracts/search?q=Benamara%20Salem"> Benamara Salem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Determining the alcohol content in alcoholic fermentation bioprocess is of great importance. In fact, it is a key indicator for monitoring this bioprocess. Several methodologies (chemical, spectrophotometric, chromatographic) are used to the determination of this parameter. However, these techniques are very long and they require: rigorous preparations, sometimes dangerous chemical reagents and/or expensive equipment. In the present study, the date juice is used as the substrate of alcoholic fermentation. The extracted juice undergoes an alcoholic fermentation by Saccharomyces cerevisiae. The study of the possible use of refractometry as a sole means for the in situ control of alcoholic fermentation revealed a good correlation (R2=0.98) between initial and final °Brix: °Brixf=0.377×°Brixi. In addition, the relationship between Δ°Brix and alcoholic content of the final product (A,%) has been determined: Δ°Brix/A=1.1. The obtained results allowed us to establish iso-responses abacus, which can be used for the determination of alcohol and residual sugar content, with a mean relative error (MRE) of 5.35%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alcoholic%20fermentation" title="alcoholic fermentation">alcoholic fermentation</a>, <a href="https://publications.waset.org/abstracts/search?q=date%20juice" title=" date juice"> date juice</a>, <a href="https://publications.waset.org/abstracts/search?q=refractometry" title=" refractometry"> refractometry</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20sugar" title=" residual sugar"> residual sugar</a> </p> <a href="https://publications.waset.org/abstracts/2808/application-of-refractometric-methodology-for-simultaneous-determination-of-alcohol-and-residual-sugar-concentrations-during-alcoholic-fermentation-bioprocess-of-date-juice" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2808.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">341</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">2525</span> Simultaneous Quantification of Glycols in New and Recycled Anti-Freeze Liquids by GC-MS</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=George%20Madalin%20Danila">George Madalin Danila</a>, <a href="https://publications.waset.org/abstracts/search?q=Mihaiella%20Cretu"> Mihaiella Cretu</a>, <a href="https://publications.waset.org/abstracts/search?q=Cristian%20Puscasu"> Cristian Puscasu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Glycol-based anti-freeze liquids, commonly composed of ethylene glycol or propylene glycol, have important uses in automotive cooling, but they should be handled with care due to their toxicity; ethylene glycol is highly toxic to humans and animals. A fast, accurate, precise, and robust method was developed for the simultaneous quantification of 7 most important glycols and their isomers. Glycols were analyzed from diluted sample solution of coolants using gas-chromatography coupled with mass spectrometry in single ion monitoring mode. Results: The method was developed and validated for 7 individual glycols (ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol and tripropylene glycol). Limits of detection (1-2 μg/mL) and limit of quantification (10 μg/mL) obtained were appropriate. The present method was applied for the determination of glycols in 10 different anti-freeze liquids commercially available on the Romanian market, proving to be reliable. A method that requires only a two-step dilution of anti-freeze samples combined with direct liquid injection GC-MS was validated for the simultaneous quantification of 7 glycols (and their isomers) in 10 different types of anti-freeze liquids. The results obtained in the validation procedure proved that the GC-MS method is sensitive and precise for the quantification of glycols. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=glycols" title="glycols">glycols</a>, <a href="https://publications.waset.org/abstracts/search?q=anti-freeze" title=" anti-freeze"> anti-freeze</a>, <a href="https://publications.waset.org/abstracts/search?q=gas-chromatography" title=" gas-chromatography"> gas-chromatography</a>, <a href="https://publications.waset.org/abstracts/search?q=mass%20spectrometry" title=" mass spectrometry"> mass spectrometry</a>, <a href="https://publications.waset.org/abstracts/search?q=validation" title=" validation"> validation</a>, <a href="https://publications.waset.org/abstracts/search?q=recycle" title=" recycle"> recycle</a> </p> <a href="https://publications.waset.org/abstracts/178902/simultaneous-quantification-of-glycols-in-new-and-recycled-anti-freeze-liquids-by-gc-ms" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/178902.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">66</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">2524</span> Simple Fabrication of Au (111)-Like Electrode and Its Applications to Electrochemical Determination of Dopamine and Ascorbic Acid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zahrah%20Thamer%20Althagafi">Zahrah Thamer Althagafi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20I.%20Awad"> Mohamed I. Awad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A simple method for the fabrication of Au (111)-like electrode via controlled reductive desorption of a pre-adsorbed cysteine monolayer onto polycrystalline gold (poly-Au) electrode is introduced. Then, the voltammetric behaviour of dopamine (DA) and ascorbic acid (AA) on the thus modified electrode is investigated. Electrochemical characterization of the modified electrode is achieved using cyclic voltammetry and square wave voltammetry. For the binary mixture of DA and AA, the results showed that Au (111)-like electrode exhibits excellent electrocatalytic activity towards the oxidation of DA and AA. This allows highly selective and simultaneous determination of DA and AA. The effect of various experimental parameters on the voltammetric responses of DA and AA was investigated. The enrichment of the Au (111) facet of the poly-Au electrode is thought to be behind the electrocatalytic activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gold%20electrode" title="gold electrode">gold electrode</a>, <a href="https://publications.waset.org/abstracts/search?q=electroanalysis" title=" electroanalysis"> electroanalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=electrocatalysis" title=" electrocatalysis"> electrocatalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=monolayers" title=" monolayers"> monolayers</a>, <a href="https://publications.waset.org/abstracts/search?q=self-assembly" title=" self-assembly"> self-assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=cysteine" title=" cysteine"> cysteine</a>, <a href="https://publications.waset.org/abstracts/search?q=dopamine" title=" dopamine"> dopamine</a>, <a href="https://publications.waset.org/abstracts/search?q=ascorbic%20acid" title=" ascorbic acid"> ascorbic acid</a> </p> <a href="https://publications.waset.org/abstracts/117052/simple-fabrication-of-au-111-like-electrode-and-its-applications-to-electrochemical-determination-of-dopamine-and-ascorbic-acid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/117052.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">195</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">2523</span> Electrochemical Sensor Based on Poly(Pyrogallol) for the Simultaneous Detection of Phenolic Compounds and Nitrite in Wastewater</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Majid%20Farsadrooh">Majid Farsadrooh</a>, <a href="https://publications.waset.org/abstracts/search?q=Najmeh%20Sabbaghi"> Najmeh Sabbaghi</a>, <a href="https://publications.waset.org/abstracts/search?q=Seyed%20Mohammad%20Mostashari"> Seyed Mohammad Mostashari</a>, <a href="https://publications.waset.org/abstracts/search?q=Abolhasan%20Moradi"> Abolhasan Moradi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phenolic compounds are chief environmental contaminants on account of their hazardous and toxic nature on human health. The preparation of sensitive and potent chemosensors to monitor emerging pollution in water and effluent samples has received great consideration. A novel and versatile nanocomposite sensor based on poly pyrogallol is presented for the first time in this study, and its electrochemical behavior for simultaneous detection of hydroquinone (HQ), catechol (CT), and resorcinol (RS) in the presence of nitrite is evaluated. The physicochemical characteristics of the fabricated nanocomposite were investigated by emission-scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), and Brunauer-Emmett-Teller (BET). The electrochemical response of the proposed sensor to the detection of HQ, CT, RS, and nitrite is studied using cyclic voltammetry (CV), chronoamperometry (CA), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). The kinetic characterization of the prepared sensor showed that both adsorption and diffusion processes can control reactions at the electrode. In the optimized conditions, the new chemosensor provides a wide linear range of 0.5-236.3, 0.8-236.3, 0.9-236.3, and 1.2-236.3 μM with a low limit of detection of 21.1, 51.4, 98.9, and 110.8 nM (S/N = 3) for HQ, CT and RS, and nitrite, respectively. Remarkably, the electrochemical sensor has outstanding selectivity, repeatability, and stability and is successfully employed for the detection of RS, CT, HQ, and nitrite in real water samples with the recovery of 96.2%–102.4%, 97.8%-102.6%, 98.0%–102.4% and 98.4%–103.2% for RS, CT, HQ, and nitrite, respectively. These outcomes illustrate that poly pyrogallol is a promising candidate for effective electrochemical detection of dihydroxybenzene isomers in the presence of nitrite. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20sensor" title="electrochemical sensor">electrochemical sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=poly%20pyrogallol" title=" poly pyrogallol"> poly pyrogallol</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=simultaneous%20determination" title=" simultaneous determination"> simultaneous determination</a> </p> <a href="https://publications.waset.org/abstracts/175723/electrochemical-sensor-based-on-polypyrogallol-for-the-simultaneous-detection-of-phenolic-compounds-and-nitrite-in-wastewater" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/175723.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">68</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">2522</span> Development and Validation of First Derivative Method and Artificial Neural Network for Simultaneous Spectrophotometric Determination of Two Closely Related Antioxidant Nutraceuticals in Their Binary Mixture”</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Korany">Mohamed Korany</a>, <a href="https://publications.waset.org/abstracts/search?q=Azza%20Gazy"> Azza Gazy</a>, <a href="https://publications.waset.org/abstracts/search?q=Essam%20Khamis"> Essam Khamis</a>, <a href="https://publications.waset.org/abstracts/search?q=Marwa%20Adel"> Marwa Adel</a>, <a href="https://publications.waset.org/abstracts/search?q=Miranda%20Fawzy"> Miranda Fawzy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Two new, simple and specific methods; First, a Zero-crossing first-derivative technique and second, a chemometric-assisted spectrophotometric artificial neural network (ANN) were developed and validated in accordance with ICH guidelines. Both methods were used for the simultaneous estimation of the two closely related antioxidant nutraceuticals ; Coenzyme Q10 (Q) ; also known as Ubidecarenone or Ubiquinone-10, and Vitamin E (E); alpha-tocopherol acetate, in their pharmaceutical binary mixture. Results: For first method: By applying the first derivative, both Q and E were alternatively determined; each at the zero-crossing of the other. The D1 amplitudes of Q and E, at 285 nm and 235 nm respectively, were recorded and correlated to their concentrations. The calibration curve is linear over the concentration range of 10-60 and 5.6-70 μg mL-1 for Q and E, respectively. For second method: ANN (as a multivariate calibration method) was developed and applied for the simultaneous determination of both analytes. A training set (or a concentration set) of 90 different synthetic mixtures containing Q and E, in wide concentration ranges between 0-100 µg/mL and 0-556 µg/mL respectively, were prepared in ethanol. The absorption spectra of the training sets were recorded in the spectral region of 230–300 nm. A Gradient Descend Back Propagation ANN chemometric calibration was computed by relating the concentration sets (x-block) to their corresponding absorption data (y-block). Another set of 45 synthetic mixtures of the two drugs, in defined range, was used to validate the proposed network. Neither chemical separation, preparation stage nor mathematical graphical treatment were required. Conclusions: The proposed methods were successfully applied for the assay of Q and E in laboratory prepared mixtures and combined pharmaceutical tablet with excellent recoveries. The ANN method was superior over the derivative technique as the former determined both drugs in the non-linear experimental conditions. It also offers rapidity, high accuracy, effort and money saving. Moreover, no need for an analyst for its application. Although the ANN technique needed a large training set, it is the method of choice in the routine analysis of Q and E tablet. No interference was observed from common pharmaceutical additives. The results of the two methods were compared together <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coenzyme%20Q10" title="coenzyme Q10">coenzyme Q10</a>, <a href="https://publications.waset.org/abstracts/search?q=vitamin%20E" title=" vitamin E"> vitamin E</a>, <a href="https://publications.waset.org/abstracts/search?q=chemometry" title=" chemometry"> chemometry</a>, <a href="https://publications.waset.org/abstracts/search?q=quantitative%20analysis" title=" quantitative analysis"> quantitative analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=first%20derivative%20spectrophotometry" title=" first derivative spectrophotometry"> first derivative spectrophotometry</a>, <a href="https://publications.waset.org/abstracts/search?q=artificial%20neural%20network" title=" artificial neural network "> artificial neural network </a> </p> <a href="https://publications.waset.org/abstracts/20123/development-and-validation-of-first-derivative-method-and-artificial-neural-network-for-simultaneous-spectrophotometric-determination-of-two-closely-related-antioxidant-nutraceuticals-in-their-binary-mixture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20123.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">446</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">2521</span> Chemometric-Based Voltammetric Method for Analysis of Vitamins and Heavy Metals in Honey Samples </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marwa%20A.%20A.%20Ragab">Marwa A. A. Ragab</a>, <a href="https://publications.waset.org/abstracts/search?q=Amira%20F.%20El-Yazbi"> Amira F. El-Yazbi</a>, <a href="https://publications.waset.org/abstracts/search?q=Amr%20El-Hawiet"> Amr El-Hawiet</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The analysis of heavy metals in honey samples is crucial. When found in honey, they denote environmental pollution. Some of these heavy metals as lead either present at low or high concentrations are considered to be toxic. Other heavy metals, for example, copper and zinc, if present at low concentrations, they considered safe even vital minerals. On the contrary, if they present at high concentrations, they are toxic. Their voltammetric determination in honey represents a challenge due to the presence of other electro-active components as vitamins, which may overlap with the peaks of the metal, hindering their accurate and precise determination. The simultaneous analysis of some vitamins: nicotinic acid (B3) and riboflavin (B2), and heavy metals: lead, cadmium, and zinc, in honey samples, was addressed. The analysis was done in 0.1 M Potassium Chloride (KCl) using a hanging mercury drop electrode (HMDE), followed by chemometric manipulation of the voltammetric data using the derivative method. Then the derivative data were convoluted using discrete Fourier functions. The proposed method allowed the simultaneous analysis of vitamins and metals though their varied responses and sensitivities. Although their peaks were overlapped, the proposed chemometric method allowed their accurate and precise analysis. After the chemometric treatment of the data, metals were successfully quantified at low levels in the presence of vitamins (1: 2000). The heavy metals limit of detection (LOD) values after the chemometric treatment of data decreased by more than 60% than those obtained from the direct voltammetric method. The method applicability was tested by analyzing the selected metals and vitamins in real honey samples obtained from different botanical origins. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chemometrics" title="chemometrics">chemometrics</a>, <a href="https://publications.waset.org/abstracts/search?q=overlapped%20voltammetric%20peaks" title=" overlapped voltammetric peaks"> overlapped voltammetric peaks</a>, <a href="https://publications.waset.org/abstracts/search?q=derivative%20and%20convoluted%20derivative%20methods" title=" derivative and convoluted derivative methods"> derivative and convoluted derivative methods</a>, <a href="https://publications.waset.org/abstracts/search?q=metals%20and%20vitamins" title=" metals and vitamins"> metals and vitamins</a> </p> <a href="https://publications.waset.org/abstracts/114051/chemometric-based-voltammetric-method-for-analysis-of-vitamins-and-heavy-metals-in-honey-samples" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/114051.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">150</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">2520</span> Liquid Chromatographic Determination of Alprazolam with ACE Inhibitors in Bulk, Respective Pharmaceutical Products and Human Serum</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saeeda%20Nadir%20Ali">Saeeda Nadir Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Najma%20Sultana"> Najma Sultana</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Saeed%20Arayne"> Muhammad Saeed Arayne</a>, <a href="https://publications.waset.org/abstracts/search?q=Amtul%20Qayoom"> Amtul Qayoom</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Present study describes a simple and a fast liquid chromatographic method using ultraviolet detector for simultaneous determination of anxiety relief medicine alprazolam with ACE inhibitors i.e; lisinopril, captopril and enalapril employing purospher star C18 (25 cm, 0.46 cm, 5 µm). Separation was achieved within 5 min at ambient temperature via methanol: water (8:2 v/v) with pH adjusted to 2.9, monitoring the detector response at 220 nm. Optimum parameters were set up as per ICH (2006) guidelines. Calibration range was found out to be 0.312-10 µg mL-1 for alprazolam and 0.625-20 µg mL-1 for all the ACE inhibitors with correlation coefficients > 0.998 and detection limits 85, 37, 68 and 32 ng mL-1 for lisinopril, captopril, enalapril and alprazolam respectively. Intra-day, inter-day precision and accuracy of the assay were in acceptable range of 0.05-1.62% RSD and 98.85-100.76% recovery. Method was determined to be robust and effectively useful for the estimation of studied drugs in dosage formulations and human serum without obstruction of excipients or serum components. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alprazolam" title="alprazolam">alprazolam</a>, <a href="https://publications.waset.org/abstracts/search?q=ACE%20inhibitors" title=" ACE inhibitors"> ACE inhibitors</a>, <a href="https://publications.waset.org/abstracts/search?q=RP%20HPLC" title=" RP HPLC"> RP HPLC</a>, <a href="https://publications.waset.org/abstracts/search?q=serum" title=" serum"> serum</a> </p> <a href="https://publications.waset.org/abstracts/34837/liquid-chromatographic-determination-of-alprazolam-with-ace-inhibitors-in-bulk-respective-pharmaceutical-products-and-human-serum" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34837.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">514</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">2519</span> Formal Ontology of Quality Space. Location, Subordination and Determination</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Claudio%20Calosi">Claudio Calosi</a>, <a href="https://publications.waset.org/abstracts/search?q=Damiano%20Costa"> Damiano Costa</a>, <a href="https://publications.waset.org/abstracts/search?q=Paolo%20Natali"> Paolo Natali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Determination is the relation that holds between certain kinds of properties, determinables – such as “being colored”, and others, determinates – such as “being red”. Subordination is the relation that holds between genus properties – such as “being an animal”, and others, species properties – such as “being human”'. It is widely held that Determination and Subordination share important similarities, yet also crucial differences. But what grounds such similarities and differences? This question is hardly ever addressed. The present paper provides the first step towards filling this gap in the literature. It argues that a locational theory of instantiation, roughly the view that to have a property is to occupy a location in quality space, holds the key for such an answer. More precisely, it argues that both principles of Determination and Subordination are just examples of more general principles of location. Consider Determination. The principle that everything that has a determinate has a determinable boils down to the claim that everything that has a precise location in quality space is in quality space – an eminently reasonable principle. The principle that nothing can have two determinates (at the same level of determination) boils down to the principle that nothing can be “multilocated” in quality space. In effect, the following provides a “translation table” between principles of location and determination: LOCATION DETERMINATION Functionality At Most One Determination Focus At Most One Determination & Requisite Determination* Exactness Requisite Determination* Super-Exactness Requisite Determination Exactitude Requisite Determination Converse-Exactness Determinable Inehritance This grounds the similarity between Determination and Subordination. What about the differences? The paper argues that the differences boil down to the mereological structure of the regions that are occupied in quality space, in particular whether they are simple or complex. The key technical detail is that Determination and Subordination induce a “set-theoretic rooted tree” structure over the domain of properties. Interestingly, the analysis also provides a possible justification for the Aristotelian claim that being is not a genus property – an argument that the paper develops in some detail. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=determinables%2Fdeterminates" title="determinables/determinates">determinables/determinates</a>, <a href="https://publications.waset.org/abstracts/search?q=genus%2Fspecies" title=" genus/species"> genus/species</a>, <a href="https://publications.waset.org/abstracts/search?q=location" title=" location"> location</a>, <a href="https://publications.waset.org/abstracts/search?q=Aristotle%20on%20being%20is%20not%20a%20genus" title=" Aristotle on being is not a genus"> Aristotle on being is not a genus</a> </p> <a href="https://publications.waset.org/abstracts/158286/formal-ontology-of-quality-space-location-subordination-and-determination" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158286.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">80</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">2518</span> Taiwanese Families' Perspectives: Promoting Foundations of Self-Determination Skills for Young Children with Special Needs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Szu-Yin%20Chu">Szu-Yin Chu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Self-determination has been particularly influential in obtaining a better quality of life through successful transition processes for students with disabilities. The development of self-determination through learning has raised attention at an early age. This study used a survey questionnaire to construct the understanding of the self-determination in Taiwan, learn the perspectives about the environmental and situational contexts where the respondents expect children to display self-determination skills in different cultures. Specifically, the research questions are: (a) What are Taiwanese families’ general perspectives about the development of foundations of self-determination for young children with special needs? and (b) how does families’ demographic background (i.e., income level, educational background) and child characteristics (i.e., age, emotional or behavior problems) impact Taiwanese families’ perspectives on the foundations of self-determination across three critical components (i.e., choice-making and problem-solving, self-regulation, and engagement) for young children with special needs? Data from 125 participants were gathered and analyzed. The findings suggested that Taiwanese families showed very positive attitudes toward promoting a foundation of self-determination for young children with special needs. Families’ income level and child’s severity of emotional/behavioral problems were two variables that were found to impact families’ views on their child’s foundational self-determination skills. Implications for future research and practice in supporting families to promote foundations of self-determination for young children with special needs will be provided. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=disabilities" title="disabilities">disabilities</a>, <a href="https://publications.waset.org/abstracts/search?q=self-determination" title=" self-determination"> self-determination</a>, <a href="https://publications.waset.org/abstracts/search?q=Taiwan" title=" Taiwan"> Taiwan</a>, <a href="https://publications.waset.org/abstracts/search?q=young%20children" title=" young children"> young children</a> </p> <a href="https://publications.waset.org/abstracts/76936/taiwanese-families-perspectives-promoting-foundations-of-self-determination-skills-for-young-children-with-special-needs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76936.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">301</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">2517</span> Causal Relationship between Corporate Governance and Financial Information Transparency: A Simultaneous Equations Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maali%20Kachouri">Maali Kachouri</a>, <a href="https://publications.waset.org/abstracts/search?q=Anis%20Jarboui"> Anis Jarboui</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We focus on the causal relationship between governance and information transparency as well as interrelation among the various governance mechanisms. This paper employs a simultaneous equations approach to show this relationship in the Tunisian context. Based on an 8-year dataset, our sample covers 28 listed companies over 2006-2013. Our findings suggest that internal and external governance mechanisms are interdependent. Moreover, in order to analyze the causal effect between information transparency and governance mechanisms, we found evidence that information transparency tends to increase good corporate governance practices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20equations%20approach" title="simultaneous equations approach">simultaneous equations approach</a>, <a href="https://publications.waset.org/abstracts/search?q=transparency" title=" transparency"> transparency</a>, <a href="https://publications.waset.org/abstracts/search?q=causal%20relationship" title=" causal relationship"> causal relationship</a>, <a href="https://publications.waset.org/abstracts/search?q=corporate%20governance" title=" corporate governance"> corporate governance</a> </p> <a href="https://publications.waset.org/abstracts/46443/causal-relationship-between-corporate-governance-and-financial-information-transparency-a-simultaneous-equations-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46443.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">353</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">2516</span> Translation, Cultural Adaptation and Validation of the Hungarian Version of Self- Determination Scale</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20E.%20Marschalko">E. E. Marschalko</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Kalcza-Janosi"> K. Kalcza-Janosi</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Kotta"> I. Kotta</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Bibok"> B. Bibok</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cultural moderation aspects have been highlighted in the literature on self-determination behavior in some cultures, including in the Hungarian population. There is a lack of validated instruments in Hungarian for the assessment of self-determination related behaviors. In order to fill in this gap, the aim of this study was the translation, cultural adaptation and validation of Self Determination Scale (Sheldon, 1995) for the Hungarian population. A total of 4335 adults participated in the study. The mean age of the participants was 27.97 (SD=9.60). The sample consisted mostly from females, less than 20% were males. Exploratory and confirmatory factor analyses were performed for adequacy checking. Cronbach’s alpha was used to examine the reliability of the factors. Our results revealed that the Hungarian version of SDS has good psychometric properties and it is a reliable tool for psychologist who would like to study or assess self-determination in their clients. The final, adapted and validated SDS items are presented in this paper. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=self-determination%20scale" title="self-determination scale">self-determination scale</a>, <a href="https://publications.waset.org/abstracts/search?q=Hungarian" title=" Hungarian"> Hungarian</a>, <a href="https://publications.waset.org/abstracts/search?q=adaptation" title=" adaptation"> adaptation</a>, <a href="https://publications.waset.org/abstracts/search?q=validation" title=" validation"> validation</a>, <a href="https://publications.waset.org/abstracts/search?q=reliability" title=" reliability"> reliability</a> </p> <a href="https://publications.waset.org/abstracts/140174/translation-cultural-adaptation-and-validation-of-the-hungarian-version-of-self-determination-scale" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140174.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">254</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">2515</span> Optimized Simultaneous Determination of Theobromine and Caffeine in Fermented and Unfermented Cacao Beans and in Cocoa Products Using Step Gradient Solvent System in Reverse Phase HPLC</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ian%20Marc%20G.%20Cabugsa">Ian Marc G. Cabugsa</a>, <a href="https://publications.waset.org/abstracts/search?q=Kim%20Ryan%20A.%20Won"> Kim Ryan A. Won</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fast, reliable and simultaneous HPLC analysis of theobromine and caffeine in cacao and cocoa products was optimized in this study. The samples tested were raw, fermented, and roasted cacao beans as well as commercially available cocoa products. The HPLC analysis was carried out using step gradient solvent system with acetonitrile and water buffered with H3PO4 as the mobile phase. The HPLC system was optimized using 273 nm wavelength at 35 °C for the column temperature with a flow rate of 1.0 mL/min. Using this method, the theobromine percent recovery mean, Limit of Detection (LOD) and Limit of Quantification (LOQ) is 118.68(±3.38)%, 0.727 and 1.05 respectively. The percent recovery mean, LOD and LOQ for caffeine is 105.53(±3.25)%, 2.42 and 3.50 respectively. The inter-day and intra-day precision for theobromine is 4.31% and 4.48% respectively, while 7.02% and 7.03% was for caffeine respectively. Compared to the standard method in AOAC using methanol in isocratic solvent system, the results of the study produced lesser chromatogram noise with emphasis on theobromine and caffeine. The method is readily usable for cacao and cocoa substances analyses using HPLC with step gradient capability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cacao" title="cacao">cacao</a>, <a href="https://publications.waset.org/abstracts/search?q=caffeine" title=" caffeine"> caffeine</a>, <a href="https://publications.waset.org/abstracts/search?q=HPLC" title=" HPLC"> HPLC</a>, <a href="https://publications.waset.org/abstracts/search?q=step%20gradient%20solvent%20system" title=" step gradient solvent system"> step gradient solvent system</a>, <a href="https://publications.waset.org/abstracts/search?q=theobromine" title=" theobromine"> theobromine</a> </p> <a href="https://publications.waset.org/abstracts/43155/optimized-simultaneous-determination-of-theobromine-and-caffeine-in-fermented-and-unfermented-cacao-beans-and-in-cocoa-products-using-step-gradient-solvent-system-in-reverse-phase-hplc" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43155.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">281</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">2514</span> Non-Local Simultaneous Sparse Unmixing for Hyperspectral Data</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fanqiang%20Kong">Fanqiang Kong</a>, <a href="https://publications.waset.org/abstracts/search?q=Chending%20Bian"> Chending Bian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sparse unmixing is a promising approach in a semisupervised fashion by assuming that the observed pixels of a hyperspectral image can be expressed in the form of linear combination of only a few pure spectral signatures (end members) in an available spectral library. However, the sparse unmixing problem still remains a great challenge at finding the optimal subset of endmembers for the observed data from a large standard spectral library, without considering the spatial information. Under such circumstances, a sparse unmixing algorithm termed as non-local simultaneous sparse unmixing (NLSSU) is presented. In NLSSU, the non-local simultaneous sparse representation method for endmember selection of sparse unmixing, is used to finding the optimal subset of endmembers for the similar image patch set in the hyperspectral image. And then, the non-local means method, as a regularizer for abundance estimation of sparse unmixing, is used to exploit the abundance image non-local self-similarity. Experimental results on both simulated and real data demonstrate that NLSSU outperforms the other algorithms, with a better spectral unmixing accuracy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hyperspectral%20unmixing" title="hyperspectral unmixing">hyperspectral unmixing</a>, <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20sparse%20representation" title=" simultaneous sparse representation"> simultaneous sparse representation</a>, <a href="https://publications.waset.org/abstracts/search?q=sparse%20regression" title=" sparse regression"> sparse regression</a>, <a href="https://publications.waset.org/abstracts/search?q=non-local%20means" title=" non-local means"> non-local means</a> </p> <a href="https://publications.waset.org/abstracts/71689/non-local-simultaneous-sparse-unmixing-for-hyperspectral-data" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71689.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">2513</span> Simple Ecofriendly Cyclodextrine-Surfactant Modified UHPLC Method for Quantification of Multivitamins in Pharmaceutical and Food Samples</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hassan%20M.%20Albishri">Hassan M. Albishri</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdullah%20Almalawi"> Abdullah Almalawi</a>, <a href="https://publications.waset.org/abstracts/search?q=Deia%20Abd%20El-Hady"> Deia Abd El-Hady</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A simple and ecofriendly cyclodextrine-surfactant modified UHPLC (CDS-UPLC) method for rapid and sensitive simultaneous determination of multi water-soluble vitamins such as ascorbic acid, pyridoxine hydrochloride and thiamine hydrochloride in commercial pharmaceuticals and milk samples have been firstly developed. Several chromatographic effective parameters have been changed in a systematic way. Adequate results have been achieved by a mixture of β-cyclodextrine (β-CD) and cationic surfactant under acidic conditions as an eco-friendly isocratic mobile phase at 0.02 mL/min flow rate. The proposed CDS- UHPLC method has been validated for the quantitative determination of multivitamins within 8 min in food and pharmaceutical samples. The method showed excellent linearity for analytes in a wide range of 10-1000 ng/µL. The repeatability and reproducibility of data were about 2.14 and 4.69 RSD%, respectively. The limits of detection (LODs) of analytes ranged between 0.86 and 5.6 ng/µL with a range of 81.8 -115.8% recoveries in tablets and milk samples. The current first CDS- UHPLC method could have vast applications for the precise analysis of multivitamins in complicated matrices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ecofriendly" title="ecofriendly">ecofriendly</a>, <a href="https://publications.waset.org/abstracts/search?q=cyclodextrine-surfactant" title=" cyclodextrine-surfactant"> cyclodextrine-surfactant</a>, <a href="https://publications.waset.org/abstracts/search?q=multivitamins" title=" multivitamins"> multivitamins</a>, <a href="https://publications.waset.org/abstracts/search?q=UHPLC" title=" UHPLC "> UHPLC </a> </p> <a href="https://publications.waset.org/abstracts/61947/simple-ecofriendly-cyclodextrine-surfactant-modified-uhplc-method-for-quantification-of-multivitamins-in-pharmaceutical-and-food-samples" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61947.pdf" target="_blank" class="btn btn-primary 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