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reactivity</title> <meta name="description" content="Search results for: cross reactivity"> <meta name="keywords" content="cross reactivity"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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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="cross reactivity"> <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> 4230</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: cross reactivity</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4230</span> Profile of Cross-Reactivity Allergens Highlighted by Multiplex Technology “Alex Microchip Technique” in the Diagnosis of Type I Hypersensitivity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gadiri%20Sabiha">Gadiri Sabiha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Current allergy diagnostic tools using Multiplex technology have made it possible to increase the efficiency of the search for specific IgE. This opportunity is provided by the newly developed “Alex Biochip”, consisting of a panel of 282 allergens in native and molecular form, a CCD inhibitor, and the potential for detecting cross-reactive allergens. We evaluated the performance of this technology in detecting cross-reactivity in previously explored patients. Material/Method: The sera of 39 patients presenting sensitization and polysensitization profiles were explored. The search for specific IgE is carried out by the Alex ® IgE Biochip, and the results are analyzed by nature and by molecular family of allergens using specific software. Results/Discussion: The analysis gave a particular profile of cross-reactivity allergens: 33% for the Ole e1 family, 31% for NPC2, 26% for storage proteins, 20% for Tropomyosin, 10% for LTPs, 10% for Arginine Kinase and 10% for Uteroglobin CCDs were absent in all patients. The “Ole e1” allergen is responsible for a pollen-pollen cross allergy. The storage proteins found and LTP are not species-specific, causing cross-pollen-food allergy. The nDer p2 of the NPC2 family is responsible for cross-reactivity between mite species. Conclusion: The cross-reactivities responsible for mixed syndromes at diagnosis in our patients were dominated by pollen-pollen and pollen-food syndromes. They allow the identification of severity factors linked to the prognosis and the best-adapted immunotherapy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=specific%20IgE" title="specific IgE">specific IgE</a>, <a href="https://publications.waset.org/abstracts/search?q=allergy" title=" allergy"> allergy</a>, <a href="https://publications.waset.org/abstracts/search?q=cross%20reactivity" title=" cross reactivity"> cross reactivity</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20allergens" title=" molecular allergens"> molecular allergens</a> </p> <a href="https://publications.waset.org/abstracts/172601/profile-of-cross-reactivity-allergens-highlighted-by-multiplex-technology-alex-microchip-technique-in-the-diagnosis-of-type-i-hypersensitivity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172601.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">4229</span> Reactivity Study on South African Calcium Based Material Using a pH-Stat and Citric Acid: A Statistical Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hilary%20Rutto">Hilary Rutto</a>, <a href="https://publications.waset.org/abstracts/search?q=Mbali%20Chiliza"> Mbali Chiliza</a>, <a href="https://publications.waset.org/abstracts/search?q=Tumisang%20Seodigeng"> Tumisang Seodigeng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study on reactivity of calcined calcium-based material is very important in dry flue gas desulphurisation (FGD) process, so as to produce absorbent with high sulphur dioxide capture capacity during the hydration process. The effect of calcining temperature and time on the reactivity of calcined limestone material were investigated. In this study, the reactivity was measured using a pH stat apparatus and also confirming the result by performing citric acid reactivity test. The reactivity was calculated using the shrinking core model. Based on the experiments, a mathematical model is developed to correlate the effect of time and temperature to the reactivity of absorbent. The calcination process variables were temperature (700 -1000°C) and time (1-6 hrs). It was found that reactivity increases with an increase in time and temperature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=reactivity" title="reactivity">reactivity</a>, <a href="https://publications.waset.org/abstracts/search?q=citric%20acid" title=" citric acid"> citric acid</a>, <a href="https://publications.waset.org/abstracts/search?q=calcination" title=" calcination"> calcination</a>, <a href="https://publications.waset.org/abstracts/search?q=time" title=" time"> time</a> </p> <a href="https://publications.waset.org/abstracts/57923/reactivity-study-on-south-african-calcium-based-material-using-a-ph-stat-and-citric-acid-a-statistical-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57923.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">220</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">4228</span> Investigation of the GFR2400 Reactivity Control System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J%C3%A1n%20Ha%C5%A1%C4%8D%C3%ADk">Ján Haščík</a>, <a href="https://publications.waset.org/abstracts/search?q=%C5%A0tefan%20%C4%8Cerba"> Štefan Čerba</a>, <a href="https://publications.waset.org/abstracts/search?q=Jakub%20L%C3%BCley"> Jakub Lüley</a>, <a href="https://publications.waset.org/abstracts/search?q=Branislav%20Vrban"> Branislav Vrban</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The presented paper is related to the design methods and neutronic characterization of the reactivity control system in the large power unit of Generation IV Gas cooled Fast Reactor – GFR2400. The reactor core is based on carbide pin fuel type with the application of refractory metallic liners used to enhance the fission product retention of the SiC cladding. The heterogeneous design optimization of control rod is presented and the results of rods worth and their interferences in a core are evaluated. In addition, the idea of reflector removal as an additive reactivity management option is investigated and briefly described. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=control%20rods%20design" title="control rods design">control rods design</a>, <a href="https://publications.waset.org/abstracts/search?q=GFR2400" title=" GFR2400"> GFR2400</a>, <a href="https://publications.waset.org/abstracts/search?q=hot%20spot" title=" hot spot"> hot spot</a>, <a href="https://publications.waset.org/abstracts/search?q=movable%20reflector" title=" movable reflector"> movable reflector</a>, <a href="https://publications.waset.org/abstracts/search?q=reactivity" title=" reactivity "> reactivity </a> </p> <a href="https://publications.waset.org/abstracts/9596/investigation-of-the-gfr2400-reactivity-control-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9596.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">437</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">4227</span> On-The-Fly Cross Sections Generation in Neutron Transport with Wide Energy Region</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rui%20Chen">Rui Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Shu-min%20Zhou"> Shu-min Zhou</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiong-jie%20Zhang"> Xiong-jie Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Ren-bo%20Wang"> Ren-bo Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Fan%20Huang"> Fan Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Bin%20Tang"> Bin Tang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> During the temperature changes in reactor core, the nuclide cross section in reactor can vary with temperature, which eventually causes the changes of reactivity. To simulate the interaction between incident neutron and various materials at different temperatures on the nose, it is necessary to generate all the relevant reaction temperature-dependent cross section. Traditionally, the real time cross section generation method is used to avoid storing huge data but contains severe problems of low efficiency and adaptability for narrow energy region. Focused on the research on multi-temperature cross sections generation in real time during in neutron transport, this paper investigated the on-the-fly cross section generation method for resolved resonance region, thermal region and unresolved resonance region, and proposed the real time multi-temperature cross sections generation method based on double-exponential formula for resolved resonance region, as well as the Neville interpolation for thermal and unresolved resonance region. To prove the correctness and validity of multi-temperature cross sections generation based on wide energy region of incident neutron, the proposed method was applied in critical safety benchmark tests, which showed the capability for application in reactor multi-physical coupling simulation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cross%20section" title="cross section">cross section</a>, <a href="https://publications.waset.org/abstracts/search?q=neutron%20transport" title=" neutron transport"> neutron transport</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title=" numerical simulation"> numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=on-the-fly" title=" on-the-fly"> on-the-fly</a> </p> <a href="https://publications.waset.org/abstracts/81585/on-the-fly-cross-sections-generation-in-neutron-transport-with-wide-energy-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/81585.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">196</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">4226</span> Histamine Skin Reactivity Increased with Body Mass Index in Korean Children</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jeong%20Hong%20Kim">Jeong Hong Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Ju%20Wan%20Kang"> Ju Wan Kang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Objective: Histamine skin prick testing is most commonly used to diagnose immunoglobulin E (IgE)-mediated allergic diseases, and histamine reactivity is used as a standardized positive control in the interpretation of a skin prick test. However, reactivity to histamine differs among individuals for reasons that are poorly understood. The present study aimed to evaluate the potential association between body mass index (BMI) and histamine skin reactivity in children. Methods: A total of 451 children (246 boys, 205 girls) aged 7–8 years were enrolled in this study. The skin prick test was performed with 26 aeroallergens commonly found in Korea. Other information was collected, including sex, age, BMI, parental allergy history, and parental smoking status. Multivariate analysis was used to confirm the association between histamine skin reactivity and BMI. Results: The histamine wheal size was revealed to be associated with BMI (Spearman's Rho 0.161, p < 0.001). This association was confirmed by multivariate analysis, after adjusting for sex, age, parental allergy history, parental smoking status, and allergic sensitization (coefficient B 0.071, 95% confidence interval 0.030–0.112). Conclusions: Skin responses to histamine were primarily correlated with increased BMI. Further studies are needed to understand the clinical implication of BMI when interpreting the results of skin prick test. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=allergy" title="allergy">allergy</a>, <a href="https://publications.waset.org/abstracts/search?q=body%20mass%20index" title=" body mass index"> body mass index</a>, <a href="https://publications.waset.org/abstracts/search?q=histamine" title=" histamine"> histamine</a>, <a href="https://publications.waset.org/abstracts/search?q=skin%20prick%20test" title=" skin prick test"> skin prick test</a> </p> <a href="https://publications.waset.org/abstracts/21778/histamine-skin-reactivity-increased-with-body-mass-index-in-korean-children" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21778.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">362</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">4225</span> Antibody Reactivity of Synthetic Peptides Belonging to Proteins Encoded by Genes Located in Mycobacterium tuberculosis-Specific Genomic Regions of Differences</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abu%20Salim%20Mustafa">Abu Salim Mustafa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The comparisons of mycobacterial genomes have identified several <em>Mycobacterium tuberculosis</em>-specific genomic regions that are absent in other mycobacteria and are known as regions of differences. Due to <em>M. tuberculosis</em>-specificity, the peptides encoded by these regions could be useful in the specific diagnosis of tuberculosis. To explore this possibility, overlapping synthetic peptides corresponding to 39 proteins predicted to be encoded by genes present in regions of differences were tested for antibody-reactivity with sera from tuberculosis patients and healthy subjects. The results identified four immunodominant peptides corresponding to four different proteins, with three of the peptides showing significantly stronger antibody reactivity and rate of positivity with sera from tuberculosis patients than healthy subjects. The fourth peptide was recognized equally well by the sera of tuberculosis patients as well as healthy subjects. Predication of antibody epitopes by bioinformatics analyses using ABCpred server predicted multiple linear epitopes in each peptide. Furthermore, peptide sequence analysis for sequence identity using BLAST suggested <em>M. tuberculosis</em>-specificity for the three peptides that had preferential reactivity with sera from tuberculosis patients, but the peptide with equal reactivity with sera of TB patients and healthy subjects showed significant identity with sequences present in nob-tuberculous mycobacteria. The three identified <em>M. tuberculosis</em>-specific immunodominant peptides may be useful in the serological diagnosis of tuberculosis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=genomic%20regions%20of%20differences" title="genomic regions of differences">genomic regions of differences</a>, <a href="https://publications.waset.org/abstracts/search?q=Mycobacterium%20tuberculossis" title=" Mycobacterium tuberculossis"> Mycobacterium tuberculossis</a>, <a href="https://publications.waset.org/abstracts/search?q=peptides" title=" peptides"> peptides</a>, <a href="https://publications.waset.org/abstracts/search?q=serodiagnosis" title=" serodiagnosis"> serodiagnosis</a> </p> <a href="https://publications.waset.org/abstracts/83354/antibody-reactivity-of-synthetic-peptides-belonging-to-proteins-encoded-by-genes-located-in-mycobacterium-tuberculosis-specific-genomic-regions-of-differences" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83354.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">183</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4224</span> Comparing Spontaneous Hydrolysis Rates of Activated Models of DNA and RNA</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20S.%20Sasi">Mohamed S. Sasi</a>, <a href="https://publications.waset.org/abstracts/search?q=Adel%20M.%20Mlitan"> Adel M. Mlitan</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdulfattah%20M.%20Alkherraz"> Abdulfattah M. Alkherraz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research project aims to investigate difference in relative rates concerning phosphoryl transfer relevant to biological catalysis of DNA and RNA in the pH-independent reactions. Activated Models of DNA and RNA for alkyl-aryl phosphate diesters (with 4-nitrophenyl as a good leaving group) have successfully been prepared to gather kinetic parameters. Eyring plots for the pH–independent hydrolysis of 1 and 2 were established at different temperatures in the range 100–160 °C. These measurements have been used to provide a better estimate for the difference in relative rates between the reactivity of DNA and RNA cleavage. Eyring plot gave an extrapolated rate of kH2O = 1 × 10-10 s -1 for 1 (RNA model) and 2 (DNA model) at 25°C. Comparing the reactivity of RNA model and DNA model shows that the difference in relative rates in the pH-independent reactions is surprisingly very similar at 25°. This allows us to obtain chemical insights into how biological catalysts such as enzymes may have evolved to perform their current functions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DNA%20and%20RNA%20models" title="DNA and RNA models">DNA and RNA models</a>, <a href="https://publications.waset.org/abstracts/search?q=relative%20rates" title=" relative rates"> relative rates</a>, <a href="https://publications.waset.org/abstracts/search?q=reactivity" title=" reactivity"> reactivity</a>, <a href="https://publications.waset.org/abstracts/search?q=phosphoryl%20transfe" title=" phosphoryl transfe"> phosphoryl transfe</a> </p> <a href="https://publications.waset.org/abstracts/17090/comparing-spontaneous-hydrolysis-rates-of-activated-models-of-dna-and-rna" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17090.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">423</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">4223</span> The Use of Polar Substituent Groups for Promoting Azo Disperse Dye Solubility and Reactivity for More Economic and Environmental Benign Applications: A Computational Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Olaide%20O.%20Wahab">Olaide O. Wahab</a>, <a href="https://publications.waset.org/abstracts/search?q=Lukman%20O.%20Olasunkanmi"> Lukman O. Olasunkanmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Krishna%20K.%20Govender"> Krishna K. Govender</a>, <a href="https://publications.waset.org/abstracts/search?q=Penny%20P.%20Govender"> Penny P. Govender</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The economic and environmental challenges associated with azo disperse dyes applications are due to poor aqueous solubility and low degradation tendency which stems from low chemical reactivity. Poor aqueous solubility property of this group of dyes necessitates the use of dispersing agents which increase operational costs and also release toxic chemical components into the environment, while their low degradation tendency is due to the high stability of the azo functional group (-N=N-) in their chemical structures. To address these problems, this study investigated theoretically the effects of some polar substituents on the aqueous solubility and reactivity properties of disperse yellow (DY) 119 dye with a view to theoretically develop new azo disperse dyes with improved solubility in water and higher degradation tendency in the environment using DMol³ computational code. All calculations were carried out using the Becke and Perdew version of Volsko-Wilk-Nusair (VWN-BP) level of density functional theory in conjunction with double numerical basis set containing polarization function (DNP). The aqueous solubility determination was achieved with conductor-like screening model for realistic solvation (COSMO-RS) in conjunction with known empirical solubility model, while the reactivity was predicted using frontier molecular orbital calculations. Most of the new derivatives studied showed evidence of higher aqueous solubility and degradation tendency compared to the parent dye. We conclude that these derivatives are promising alternative dyes for more economic and environmental benign dyeing practice and therefore recommend them for synthesis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aqueous%20solubility" title="aqueous solubility">aqueous solubility</a>, <a href="https://publications.waset.org/abstracts/search?q=azo%20disperse%20dye" title=" azo disperse dye"> azo disperse dye</a>, <a href="https://publications.waset.org/abstracts/search?q=degradation" title=" degradation"> degradation</a>, <a href="https://publications.waset.org/abstracts/search?q=disperse%20yellow%20119" title=" disperse yellow 119"> disperse yellow 119</a>, <a href="https://publications.waset.org/abstracts/search?q=DMol%C2%B3" title=" DMol³"> DMol³</a>, <a href="https://publications.waset.org/abstracts/search?q=reactivity" title=" reactivity"> reactivity</a> </p> <a href="https://publications.waset.org/abstracts/86086/the-use-of-polar-substituent-groups-for-promoting-azo-disperse-dye-solubility-and-reactivity-for-more-economic-and-environmental-benign-applications-a-computational-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86086.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">204</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">4222</span> A Rationale to Describe Ambident Reactivity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=David%20Ryan">David Ryan</a>, <a href="https://publications.waset.org/abstracts/search?q=Martin%20Breugst"> Martin Breugst</a>, <a href="https://publications.waset.org/abstracts/search?q=Turlough%20Downes"> Turlough Downes</a>, <a href="https://publications.waset.org/abstracts/search?q=Peter%20A.%20Byrne"> Peter A. Byrne</a>, <a href="https://publications.waset.org/abstracts/search?q=Gerard%20P.%20McGlacken"> Gerard P. McGlacken</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An ambident nucleophile is a nucleophile that possesses two or more distinct nucleophilic sites that are linked through resonance and are effectively “in competition” for reaction with an electrophile. Examples include enolates, pyridone anions, and nitrite anions, among many others. Reactions of ambident nucleophiles and electrophiles are extremely prevalent at all levels of organic synthesis. The principle of hard and soft acids and bases (the “HSAB principle”) is most commonly cited in the explanation of selectivities in such reactions. Although this rationale is pervasive in any discussion on ambident reactivity, the HSAB principle has received considerable criticism. As a result, the principle’s supplantation has become an area of active interest in recent years. This project focuses on developing a model for rationalizing ambident reactivity. Presented here is an approach that incorporates computational calculations and experimental kinetic data to construct Gibbs energy profile diagrams. The preferred site of alkylation of nitrite anion with a range of ‘hard’ and ‘soft’ alkylating agents was established by ¹H NMR spectroscopy. Pseudo-first-order rate constants were measured directly by ¹H NMR reaction monitoring, and the corresponding second-order constants and Gibbs energies of activation were derived. These, in combination with computationally derived standard Gibbs energies of reaction, were sufficient to construct Gibbs energy wells. By representing the ambident system as a series of overlapping Gibbs energy wells, a more intuitive picture of ambident reactivity emerges. Here, previously unexplained switches in reactivity in reactions involving closely related electrophiles are elucidated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ambident" title="ambident">ambident</a>, <a href="https://publications.waset.org/abstracts/search?q=Gibbs" title=" Gibbs"> Gibbs</a>, <a href="https://publications.waset.org/abstracts/search?q=nucleophile" title=" nucleophile"> nucleophile</a>, <a href="https://publications.waset.org/abstracts/search?q=rates" title=" rates"> rates</a> </p> <a href="https://publications.waset.org/abstracts/162495/a-rationale-to-describe-ambident-reactivity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162495.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">84</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">4221</span> Raising Antibodies against Epoxyscillirosidine, the Toxic Principle Contained in Moraea pallida Bak. in Rabbits</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamza%20I.%20Isa">Hamza I. Isa</a>, <a href="https://publications.waset.org/abstracts/search?q=Gezina%20C.%20H.%20Ferreira"> Gezina C. H. Ferreira</a>, <a href="https://publications.waset.org/abstracts/search?q=Jan%20E.%20Crafford"> Jan E. Crafford</a>, <a href="https://publications.waset.org/abstracts/search?q=Christoffel%20J.%20Botha"> Christoffel J. Botha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Moraea pallida Bak. (yellow tulip) poisoning is the most important plant-induced cardiac glycoside toxicosis in South Africa. Cardiac glycoside poisonings collectively account for about 33 and 10 % mortalities due to plants, in large and small stock respectively, in South Africa. The toxic principle is 1α, 2α-epoxyscillirosidine, a bufadienolide. The aim of the study was to investigate the potential to develop a vaccine against epoxyscillirosidine. Epoxyscillirosidine and the related bufadienolides proscillaridin and bufalin, which are commercially available, were conjugated to the carrier proteins [Hen ovalbumin (OVA), bovine serum albumin (BSA) and keyhole limpet haemocyanin (KLH)], rendering them immunogenic. Adult male New Zealand White rabbits were immunized. In Trials 1 and 2, rabbits (n=6) were, each assigned to two groups. Experimental animals (n=3; n=4) were vaccinated with epoxyscillirosidine-OVA conjugate, while the control (n=3; n=2) were vaccinated with OVA, using Freund’s complete and incomplete and Montanide adjuvants, for Trials 1 and 2, respectively. In Trial 3, rabbits (n=15), randomly allocated to 5 equal groups (I, II, III, IV and V), were vaccinated with proscillaridin-BSA, bufalin-BSA, epoxyscillirosidine-KLH, epoxyscillirosidine-BSA conjugates, and BSA respectively, using Montanide as adjuvant. Vaccination was on Days 0, 21 and 42. Additional vaccinations were done on Day 56 and 63 for Trial 1. Vaccination was by intradermal injection of 0.4 ml of the immunogen (4 mg/ml [Trial 1] and 8 mg/ml for Trials 2 and Trial 3, respectively). Blood was collected pre-vaccination and at 3 week intervals following each vaccination. Antibody response was determined using an indirect ELISA. There was poor immune response associated with the dose (0.4 mg per rabbit) and adjuvant used in Trial 1. Antibodies were synthesized against the conjugate administered in Trial 2. For Trail 3, antibodies against the immunogens were successfully raised in rabbits with epoxyscillirosidine-KLH inducing the highest immune response. The antibodies raised against proscillaridin and bufalin cross-reacted with epoxyscillirosidine when used as antigen in the ELISA. The study successfully demonstrated the synthesis of antibodies against the bufadienolide conjugates administered. The cross-reactivity of proscillaridin and bufalin with epoxyscillirosidine could potentially be utilized as alternative to epoxyscillirosidine in future studies to prevent yellow tulp poisoning by vaccination. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antibodies" title="antibodies ">antibodies </a>, <a href="https://publications.waset.org/abstracts/search?q=bufadienolides" title=" bufadienolides"> bufadienolides</a>, <a href="https://publications.waset.org/abstracts/search?q=cross-reactivity" title=" cross-reactivity"> cross-reactivity</a>, <a href="https://publications.waset.org/abstracts/search?q=epoxyscillirosidine" title=" epoxyscillirosidine"> epoxyscillirosidine</a>, <a href="https://publications.waset.org/abstracts/search?q=Moraea%20pallida" title=" Moraea pallida"> Moraea pallida</a>, <a href="https://publications.waset.org/abstracts/search?q=poisoning" title=" poisoning "> poisoning </a> </p> <a href="https://publications.waset.org/abstracts/92743/raising-antibodies-against-epoxyscillirosidine-the-toxic-principle-contained-in-moraea-pallida-bak-in-rabbits" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92743.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">155</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">4220</span> Substitution of Formaldehyde in Phenolic Resins with Innovative and Bio-Based Vanillin Derived Compounds</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sylvain%20Caillol">Sylvain Caillol</a>, <a href="https://publications.waset.org/abstracts/search?q=Ghislain%20David"> Ghislain David</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phenolic resins are industrially used in a wide range of applications from commodity and construction materials to high-technology aerospace industry. They are mainly produced from the reaction between phenolic compounds and formaldehyde. Nevertheless, formaldehyde is a highly volatile and hazardous compound, classified as a Carcinogenic, Mutagenic and Reprotoxic chemical (CMR). Vanillin is a bio-based and non-toxic aromatic aldehyde compound obtained from the abundant lignin resources. Also, its aromaticity is very interesting for the synthesis of phenolic resins with high thermal stability. However, because of the relatively low reactivity of its aldehyde function toward phenolic compounds, it has never been used to synthesize phenolic resins. We developed innovative functionalization reactions and designed new bio-based aromatic aldehyde compounds from vanillin. Those innovative compounds present improved reactivity toward phenolic compounds compared to vanillin. Moreover, they have target structures to synthesize highly cross-linked phenolic resins with high aromatic densities. We have obtained phenolic resins from substituted vanillin, thus without the use of any aldehyde compound classified as CMR. The analytical tests of the cured resins confirmed that those bio-based resins exhibit high levels of performance with high thermal stability and high rigidity properties <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=phenolic%20resins" title="phenolic resins">phenolic resins</a>, <a href="https://publications.waset.org/abstracts/search?q=formaldehyde-free" title=" formaldehyde-free"> formaldehyde-free</a>, <a href="https://publications.waset.org/abstracts/search?q=vanillin" title=" vanillin"> vanillin</a>, <a href="https://publications.waset.org/abstracts/search?q=bio-based" title=" bio-based"> bio-based</a>, <a href="https://publications.waset.org/abstracts/search?q=non-toxic" title=" non-toxic"> non-toxic</a> </p> <a href="https://publications.waset.org/abstracts/40492/substitution-of-formaldehyde-in-phenolic-resins-with-innovative-and-bio-based-vanillin-derived-compounds" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40492.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">272</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">4219</span> Preliminary Study on the Factors Affecting Safety Parameters of (Th, U)O₂ Fuel Cycle: The Basis for Choosing Three Fissile Enrichment Zones</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20H.%20Uguru">E. H. Uguru</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20F.%20A.%20Sani"> S. F. A. Sani</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20U.%20Khandaker"> M. U. Khandaker</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20H.%20Rabir"> M. H. Rabir</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The beginning of cycle transient safety parameters is paramount for smooth reactor operation. The enhanced operational safety of UO₂ fuelled AP1000 reactor being the first using three fissile enrichment zones motivated this research for (Th, U)O₂ fuel. This study evaluated the impact of fissile enrichment, soluble boron, and gadolinia on the transient safety parameters to determine the basis for choosing the three fissile enrichment zones. Fuel assembly and core model of Westinghouse small modular reactor were investigated using different fuel and reactivity control arrangements. The Monte Carlo N-Particle eXtended (MCNPX) integrated with CINDER90 burn-up code was used for the calculations. The results show that the moderator temperature coefficient of reactivity (MTC) and the fuel temperature coefficient of reactivity (FTC) were respectively negative and decreased with increasing fissile enrichment. Soluble boron significantly decreased the MTC but slightly increased FTC while gadolinia followed the same trend with a minor impact. However, the MTC and FTC respectively decreased significantly with increasing change in temperature. These results provide a guide on the considerable factors in choosing the three fissile enrichment zones for (Th, U)O₂ fuel in anticipation of their impact on safety parameters. Therefore, this study provides foundational results on the factors that must be considered in choosing three fissile arrangement zones for (Th, U)O₂ fuel. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=reactivity" title="reactivity">reactivity</a>, <a href="https://publications.waset.org/abstracts/search?q=safety%20parameters" title=" safety parameters"> safety parameters</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20modular%20reactor" title=" small modular reactor"> small modular reactor</a>, <a href="https://publications.waset.org/abstracts/search?q=soluble%20boron" title=" soluble boron"> soluble boron</a>, <a href="https://publications.waset.org/abstracts/search?q=thorium%20fuel%20cycle" title=" thorium fuel cycle"> thorium fuel cycle</a> </p> <a href="https://publications.waset.org/abstracts/115492/preliminary-study-on-the-factors-affecting-safety-parameters-of-th-uo2-fuel-cycle-the-basis-for-choosing-three-fissile-enrichment-zones" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/115492.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">131</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">4218</span> Experimental and Numerical Analyses of Tehran Research Reactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Lashkari">A. Lashkari</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Khalafi"> H. Khalafi</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Khazeminejad"> H. Khazeminejad</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Khakshourniya"> S. Khakshourniya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a numerical model is presented. The model is used to analyze a steady state thermo-hydraulic and reactivity insertion transient in TRR reference cores respectively. The model predictions are compared with the experiments and PARET code results. The model uses the piecewise constant and lumped parameter methods for the coupled point kinetics and thermal-hydraulics modules respectively. The advantages of the piecewise constant method are simplicity, efficiency and accuracy. A main criterion on the applicability range of this model is that the exit coolant temperature remains below the saturation temperature, i.e. no bulk boiling occurs in the core. The calculation values of power and coolant temperature, in steady state and positive reactivity insertion scenario, are in good agreement with the experiment values. However, the model is a useful tool for the transient analysis of most research reactor encountered in practice. The main objective of this work is using simple calculation methods and benchmarking them with experimental data. This model can be used for training proposes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thermal-hydraulic" title="thermal-hydraulic">thermal-hydraulic</a>, <a href="https://publications.waset.org/abstracts/search?q=research%20reactor" title=" research reactor"> research reactor</a>, <a href="https://publications.waset.org/abstracts/search?q=reactivity%20insertion" title=" reactivity insertion"> reactivity insertion</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20modeling" title=" numerical modeling"> numerical modeling</a> </p> <a href="https://publications.waset.org/abstracts/13031/experimental-and-numerical-analyses-of-tehran-research-reactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13031.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">401</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">4217</span> ELISA Based hTSH Assessment Using Two Sensitive and Specific Anti-hTSH Polyclonal Antibodies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maysam%20Mard-Soltani">Maysam Mard-Soltani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamad%20Javad%20Rasaee"> Mohamad Javad Rasaee</a>, <a href="https://publications.waset.org/abstracts/search?q=Saeed%20Khalili"> Saeed Khalili</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdol%20Karim%20Sheikhi"> Abdol Karim Sheikhi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Hedayati"> Mehdi Hedayati</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Production of specific antibody responses against hTSH is a cumbersome process due to the high identity between the hTSH and the other members of the glycoprotein hormone family (FSH, LH and HCG) and the high identity between the human hTSH and host animals for antibody production. Therefore, two polyclonal antibodies were purified against two recombinant proteins. Four possible ELISA tests were designed based on these antibodies. These ELISA tests were checked against hTSH and other glycoprotein hormones, and their sensitivity and specificity were assessed. Bioinformatics tools were used to analyze the immunological properties. After the immunogen region selection from hTSH protein, c terminal of B hTSH was selected and applied. Two recombinant genes, with these cut pieces (first: two repeats of C terminal of B hTSH, second: tetanous toxin+B hTSH C terminal), were designed and sub-cloned into the pET32a expression vector. Standard methods were used for protein expression, purification, and verification. Thereafter, immunizations of the white New Zealand rabbits were performed and the serums of them were used for antibody titration, purification and characterization. Then, four ELISA tests based on two antibodies were employed to assess the hTSH and other glycoprotein hormones. The results of these assessments were compared with standard amounts. The obtained results indicated that the desired antigens were successfully designed, sub-cloned, expressed, confirmed and used for <em>in vivo</em> immunization. The raised antibodies were capable of specific and sensitive hTSH detection, while the cross reactivity with the other members of the glycoprotein hormone family was minimum. Among the four designed tests, the test in which the antibody against first protein was used as capture antibody, and the antibody against second protein was used as detector antibody did not show any hook effect up to 50 miu/l. Both proteins have the ability to induce highly sensitive and specific antibody responses against the hTSH. One of the antibody combinations of these antibodies has the highest sensitivity and specificity in hTSH detection. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hTSH" title="hTSH">hTSH</a>, <a href="https://publications.waset.org/abstracts/search?q=bioinformatics" title=" bioinformatics"> bioinformatics</a>, <a href="https://publications.waset.org/abstracts/search?q=protein%20expression" title=" protein expression"> protein expression</a>, <a href="https://publications.waset.org/abstracts/search?q=cross%20reactivity" title=" cross reactivity"> cross reactivity</a> </p> <a href="https://publications.waset.org/abstracts/84047/elisa-based-htsh-assessment-using-two-sensitive-and-specific-anti-htsh-polyclonal-antibodies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84047.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">189</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">4216</span> Development of Monoclonal Antibodies against the Acute Hepatopancreatic Necrosis Disease Toxins</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Naveen%20Kumar%20B.%20T.">Naveen Kumar B. T.</a>, <a href="https://publications.waset.org/abstracts/search?q=Anuj%20Tyagi"> Anuj Tyagi</a>, <a href="https://publications.waset.org/abstracts/search?q=Niraj%20Kumar%20Singh"> Niraj Kumar Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=Visanu%20Boonyawiwat"> Visanu Boonyawiwat</a>, <a href="https://publications.waset.org/abstracts/search?q=Shanthanagouda%20A.%20H."> Shanthanagouda A. H.</a>, <a href="https://publications.waset.org/abstracts/search?q=Orawan%20Boodde"> Orawan Boodde</a>, <a href="https://publications.waset.org/abstracts/search?q=Shankar%20K.%20M."> Shankar K. M.</a>, <a href="https://publications.waset.org/abstracts/search?q=Prakash%20Patil"> Prakash Patil</a>, <a href="https://publications.waset.org/abstracts/search?q=Shubhkaramjeet%20Kaur"> Shubhkaramjeet Kaur</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Since 2009, Acute Hepatopancreatic Necrosis Disease (AHPND) outbreaks have increased rapidly, and these have led to the major economic losses to the global shrimp industry. In comparison to other treatments, passive immunity and monoclonal antibody (MAb) based farmer level kit have proved their importance in controlling and treating the diseases in the shrimp industry. In the present study, MAbs were produced against the recombinant PirB protein Vibrio parahaemolyticus strain causing AHPND. Briefly, Balb/C mice were immunized with rPirB at 15 days interval, and antibody titer was determined by ELISA. Spleen cells from mice showing high antibody titer were fused with SP2O myeloma cells for hybridoma production. Among 130 hybridomas, four showed high antibody titer and positive reactivity in an immunoblot assay. In Western blot assay, three out of four MAbs (4C4, 2C2 and 4G3) showed reactivity to rPirB protein. However, in the natural host, only Mab clone 4G3 show strong reactivity (with a strain of V. parahemolyticus causing EMS/AHPND). These clones also showed reactivity with less than 20 kDa proteins in AHPND free V. parahaemolyticus (Thailand stain). Further, on from MAb 4G3 clone, four panels of single cell MAbs clones (G3F5, G3B8, G3H2, and G3D6) were produced of which three showed strong positive reactivity to rPirB protein in the Western blot. These MAbs have potential for controlling and prevention of the AHPND through passive immunity and development of filed level rapid diagnostic kits. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shrimp" title="shrimp">shrimp</a>, <a href="https://publications.waset.org/abstracts/search?q=economic%20loss" title=" economic loss"> economic loss</a>, <a href="https://publications.waset.org/abstracts/search?q=AHPND" title=" AHPND"> AHPND</a>, <a href="https://publications.waset.org/abstracts/search?q=MAb" title=" MAb"> MAb</a> </p> <a href="https://publications.waset.org/abstracts/100048/development-of-monoclonal-antibodies-against-the-acute-hepatopancreatic-necrosis-disease-toxins" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100048.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">4215</span> Prediction of the Regioselectivity of 1,3-Dipolar Cycloaddition Reactions of Nitrile Oxides with 2(5H)-Furanones Using Recent Theoretical Reactivity Indices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Imad%20Eddine%20Charif">Imad Eddine Charif</a>, <a href="https://publications.waset.org/abstracts/search?q=Wafaa%20Benchouk"> Wafaa Benchouk</a>, <a href="https://publications.waset.org/abstracts/search?q=Sidi%20Mohamed%20Mekelleche"> Sidi Mohamed Mekelleche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The regioselectivity of a series of 16 1,3-dipolar cycloaddition reactions of nitrile oxides with 2(5H)-furanones has been analysed by means of global and local electrophilic and nucleophilic reactivity indices using density functional theory at the B3LYP level together with the 6-31G(d) basis set. The local electrophilicity and nucleophilicity indices, based on Fukui and Parr functions, have been calculated for the terminal sites, namely the C1 and O3 atoms of the 1,3-dipole and the C4 and C5 atoms of the dipolarophile. These local indices were calculated using both Mulliken and natural charges and spin densities. The results obtained show that the C5 atom of the 2(5H)-furanones is the most electrophilic site whereas the O3 atom of the nitrile oxides is the most nucleophilic centre. It turns out that the experimental regioselectivity is correctly reproduced, indicating that both Fukui- and Parr-based indices are efficient tools for the prediction of the regiochemistry of the studied reactions and could be used for the prediction of newly designed reactions of the same kind. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=1" title="1">1</a>, <a href="https://publications.waset.org/abstracts/search?q=3-dipolar%20cycloaddition" title="3-dipolar cycloaddition">3-dipolar cycloaddition</a>, <a href="https://publications.waset.org/abstracts/search?q=density%20functional%20theory" title=" density functional theory"> density functional theory</a>, <a href="https://publications.waset.org/abstracts/search?q=nitrile%20oxides" title=" nitrile oxides"> nitrile oxides</a>, <a href="https://publications.waset.org/abstracts/search?q=regioselectivity" title=" regioselectivity"> regioselectivity</a>, <a href="https://publications.waset.org/abstracts/search?q=reactivity%20indices" title=" reactivity indices"> reactivity indices</a> </p> <a href="https://publications.waset.org/abstracts/92661/prediction-of-the-regioselectivity-of-13-dipolar-cycloaddition-reactions-of-nitrile-oxides-with-25h-furanones-using-recent-theoretical-reactivity-indices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92661.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">166</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">4214</span> Allergy to Animal Hair in the Algerian Population</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meriche%20Hacene">Meriche Hacene</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Allergy to animal hair is hypersensitivity to animal appendages to look for in front of any rhinoconjunctivitis or asthma. An anamnesis associated with the prick-tests makes it possible to guide the diagnosis, which will be supplemented in case of doubt by specific immunoglobulin E (IgE) assays. The objective of our study is to study the characteristics of patients sensitized to animal hair. Patients and methods: Retrospective study conducted on 105 adult patients and 69 children over a period of 3 years, including patients who received a specific IgE assay (respiratory panel and pediatric panel) by immunodot method. Result: 105 adult patients, including 74 women and 31 men, with an average age of 41 years, of which 8.5% had sensitization to animal hair (5 men and 4 women), namely: cat (5%), horse (4.7%) and dog (3.8%). For the 69 children, a slight female predominance was noted (56%), with an average age of 7.5 years, of which (13%) are sensitized to animal hair (5 girls and 4 boys): cat (10%), while awareness of dog and horse hair was less frequent with an identical prevalence of (4.34%). The dominant symptoms are rhinorrhea and sneezing for both categories, respectively (40% and 26.6% in adults and 23% for both symptoms in children). Cross-sensitization was observed in the 2 series: 1 single cat-dog and cat-horse case and 2 dog-horse cases in adults. In children, 100% of patients with sensitization to dog hair had cross-sensitization to cat hair, only 1 case was observed for cat-horse cross-reactivity. Conclusion This work shows that allergy to animal hair is common. Studies on more representative samples are recommended. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=specific%20IgE" title="specific IgE">specific IgE</a>, <a href="https://publications.waset.org/abstracts/search?q=allergy" title=" allergy"> allergy</a>, <a href="https://publications.waset.org/abstracts/search?q=cat" title=" cat"> cat</a>, <a href="https://publications.waset.org/abstracts/search?q=fed1" title=" fed1"> fed1</a> </p> <a href="https://publications.waset.org/abstracts/167962/allergy-to-animal-hair-in-the-algerian-population" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167962.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">102</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">4213</span> Synthesis, Characterization of Benzodiazepine Derivatives through Condensation Reaction, Crystal Structure, and DFT Calculations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Samir%20Hmaimou">Samir Hmaimou</a>, <a href="https://publications.waset.org/abstracts/search?q=Marouane%20Ait%20Lahcen"> Marouane Ait Lahcen</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Adardour"> Mohamed Adardour</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Maatallah"> Mohamed Maatallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdesselam%20Baouid"> Abdesselam Baouid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The stereoisomers (E)-2,2-dimethyl-4-(4-subsitutedstyryl)-2,3-dihydro-1H-[1,5]-benzodiazepine 3(a-d) were synthesized via the condensation reaction of 2,2,3 4-trimethyl-2,3-dihydro-1H-1,5-benzodiazepine (BZD) 1 with the benzaldehyde derivatives 2(a-d) in polar protic solvent as ethanol. The chemical structure of the prepared products was confirmed by NMR (¹H and ¹³C), HRMS, and X-ray analysis of the crystal structure 3d. The condensation reaction was examined using DFT calculations at the theoretical level of B3LYP/6-311G(d,p). Frontier molecular orbital analysis shows that the most favorable interaction is between the HOMO of BZD 1 and the LUMO of 2(a-d). On the other hand, the calculation of the global reactivity indices (softness, hardness, and chemical potential) confirmed that benzodiazepine BDZ 1 act as a nucleophile, whereas the aldehyde derivatives 2(a-d) play the role of electrophile. Furthermore, we identified each reagent's reactive sites by the measurement of the reactivity indices to explain the experimentally observed regioselectivity, using Fukui local reactivity descriptors. A one-step mechanism reaction and order 2 water elimination were investigated. We also looked at how the electron-withdrawing groups (EWG) of various aldehydes affected the reaction's mechanism and the stability of products 3(a-d). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benzodiazepine" title="benzodiazepine">benzodiazepine</a>, <a href="https://publications.waset.org/abstracts/search?q=DFT%20calculations" title=" DFT calculations"> DFT calculations</a>, <a href="https://publications.waset.org/abstracts/search?q=crystal%20structure" title=" crystal structure"> crystal structure</a>, <a href="https://publications.waset.org/abstracts/search?q=regioselective" title=" regioselective"> regioselective</a>, <a href="https://publications.waset.org/abstracts/search?q=condensation%20Reaction" title=" condensation Reaction"> condensation Reaction</a> </p> <a href="https://publications.waset.org/abstracts/192346/synthesis-characterization-of-benzodiazepine-derivatives-through-condensation-reaction-crystal-structure-and-dft-calculations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192346.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">14</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">4212</span> Cross Reactivity of Risperidone in Fentanyl Point of Care Devices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Barry%20D.%20Kyle">Barry D. Kyle</a>, <a href="https://publications.waset.org/abstracts/search?q=Jessica%20Boyd"> Jessica Boyd</a>, <a href="https://publications.waset.org/abstracts/search?q=Robin%20Pickersgill"> Robin Pickersgill</a>, <a href="https://publications.waset.org/abstracts/search?q=Nicole%20Squires"> Nicole Squires</a>, <a href="https://publications.waset.org/abstracts/search?q=Cynthia%20Balion"> Cynthia Balion</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background-Aim: Fentanyl is a highly-potent synthetic μ-opioid receptor agonist used for exceptional pain management. Its main metabolite, norfentanyl, is typically present in urine at significantly high concentrations (i.e. ~20%) representing an effective targeting molecule for immunoassay detection. Here, we evaluated the NCS<sup>TM</sup> One Step Fentanyl Test Device© and the BTNX Rapid Response<sup>TM</sup> Single Drug Test Strip© point of care (POC) test strips targeting norfentanyl (20 ng/ml) and fentanyl (100 ng/ml) molecules for potential risperidone interference. Methods: POC tests calibrated against norfentanyl (20 ng/ml) used [immunochromatographic] lateral flow devices to provide qualitative results within five minutes of urine sample contact. Results were recorded as negative if lines appeared in the test and control regions according to manufacturer’s instructions. Positive results were recorded if no line appeared in the test region (i.e., control line only visible). Pooled patient urine (n=20), that screened negative for drugs of abuse (using NCS One Step Multi-Line Screen) and fentanyl (using BTNX Rapid Response Strip) was used for spiking studies. Urine was spiked with risperidone alone and with combinations of fentanyl, norfentanyl and/or risperidone to evaluate cross-reactivity in each test device. Results: A positive screen result was obtained when 8,000 ng/mL of risperidone was spiked into drug free urine using the NCS test device. Positive screen results were also obtained in spiked urine samples containing fentanyl and norfentanyl combinations below the cut-off concentrations when 4000 ng/mL risperidone was present using the NCS testing device. There were no screen positive test results using the BTNX test strip with up to 8,000 ng/mL alone or in combination with concentrations of fentanyl and norfentanyl below the cut-off. Both devices screened positive when either fentanyl or norfentanyl exceeded the cut-off threshold in the absence and presence of risperidone. Conclusion: We report that urine samples containing risperidone may give a false positive result using the NCS One Step Fentanyl Test Device. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fentanyl" title="fentanyl">fentanyl</a>, <a href="https://publications.waset.org/abstracts/search?q=interferences" title=" interferences"> interferences</a>, <a href="https://publications.waset.org/abstracts/search?q=point%20of%20care%20test" title=" point of care test"> point of care test</a>, <a href="https://publications.waset.org/abstracts/search?q=Risperidone" title=" Risperidone"> Risperidone</a> </p> <a href="https://publications.waset.org/abstracts/87607/cross-reactivity-of-risperidone-in-fentanyl-point-of-care-devices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87607.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">274</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">4211</span> Allergy to Animal Hair in the Algerian Population</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meriche%20Hacene">Meriche Hacene</a>, <a href="https://publications.waset.org/abstracts/search?q=Gadiri%20Sabiha"> Gadiri Sabiha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Allergy to animal hair is hypersensitivity to animal appendages to look for in front of any rhinoconjunctivitis or asthma. An anamnesis associated with the prick-tests makes it possible to guide the diagnosis, which will be supplemented in case of doubt by specific immunoglobulin E (IgE) assays. The objective of our study is to study the characteristics of patients sensitized to animal hair. Patients and methods: Retrospective study conducted on 105 adult patients and 69 children over a period of 3 years, including patients who received a specific IgE assay (respiratory panel and pediatric panel) by immunodot method. Result: 105 adult patients, including 74 women and 31 men, with an average age of 41 years, of which 8.5% had sensitization to animal hair (5 men and 4 women), namely: cat (5%), horse (4.7%) and dog (3.8%). For the 69 children, a slight female predominance was noted (56%), with an average age of 7.5 years, of which (13%) are sensitized to animal hair (5 girls and 4 boys): cat (10%), while awareness of dog and horse hair was less frequent with an identical prevalence of (4.34%). The dominant symptoms are rhinorrhea and sneezing for both categories, respectively (40% and 26.6% in adults and 23% for both symptoms in children). Cross-sensitization was observed in the 2 series: 1 single cat-dog and cat-horse case and 2 dog-horse cases in adults. In children 100% of patients with sensitization to dog hair had cross-sensitization to cat hair, only 1 case was observed for cat-horse cross-reactivity. Conclusion: This work shows that allergy to animal hair is common. Studies on more representative samples are recommended. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=children" title="children">children</a>, <a href="https://publications.waset.org/abstracts/search?q=allegy%20to%20animals" title=" allegy to animals"> allegy to animals</a>, <a href="https://publications.waset.org/abstracts/search?q=specific%20Ig%20E" title=" specific Ig E"> specific Ig E</a>, <a href="https://publications.waset.org/abstracts/search?q=hypersensitivity" title=" hypersensitivity"> hypersensitivity</a> </p> <a href="https://publications.waset.org/abstracts/171778/allergy-to-animal-hair-in-the-algerian-population" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171778.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">4210</span> Seroprevalence of Middle East Respiratory Syndrome Coronavirus (MERS-Cov) Infection among Healthy and High Risk Individuals in Qatar</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Raham%20El-Kahlout">Raham El-Kahlout</a>, <a href="https://publications.waset.org/abstracts/search?q=Hadi%20Yassin"> Hadi Yassin</a>, <a href="https://publications.waset.org/abstracts/search?q=Asmaa%20Athani"> Asmaa Athani</a>, <a href="https://publications.waset.org/abstracts/search?q=Marwan%20Abou%20Madi"> Marwan Abou Madi</a>, <a href="https://publications.waset.org/abstracts/search?q=Gheyath%20Nasrallah"> Gheyath Nasrallah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Since its first isolation in September 2012, Middle East respiratory syndrome coronavirus (MERS-CoV) has diffused across 27 countries infecting more than two thousand individuals with a high case fatality rate. MERS-CoV–specific antibodies are widely found in Dromedary camel along with viral shedding of similar viruses detected in human at same region, suggesting that MERS epidemiology may be central role by camel. Interestingly, MERS-CoV has also been also reported to be asymptomatic or to cause influenza-like mild illnesses. Therefore, in a country like Qatar (bordered Saudi Arabia), where camels are widely spread, serological surveys are important to explore the role of camels in MERS-CoV transmission. However, widespread strategic serological surveillances of MERS-CoV among populations, particularly in endemic country, are infrequent. In the absence of clear epidemiological view, cross-sectional MERS antibody surveillances in human populations are of global concern. Method: We performed a comparative serological screening of 4719 healthy blood donors, 135 baseline case contacts (high risk individual), and four MERS confirmed patients (by PCR) for the presence of anti-MERS IgG. Initially, samples were screened using Euroimmune anti- MERS-CoV IgG ELISA kit, the only commercial kit available in the market and recommended by the CDC as a screening kit. To confirm ELISA test results, farther serological testing was performed for all borderline and positive samples using two assays; the anti MERS-CoV IgG and IgM Euroimmune indirect immunofluorescent test (IIFT) and pseudoviral particle neutralizing assay (PPNA). Additionally, to test cross reactivity of anti-MERS-CoV antibody with other family members of coronavirus, borderline and positive samples were tested for the presence of the of IgG antibody of the following viruses; SARS, HCoV-229E, HKU1 using the Euroimmune IIFT for SARS and HCoV-229E and ELISA for HKU1. Results: In all of 4858 screened 15 samples [10 donors (0.21%, 10/4719), 1 case contact (0.77 %, 1/130), 3 patients (75%, 3/4)] anti-MERS IgG reactive/borderline samples were seen in ELISA. However, only 7 (0.14%) of them gave positive with in IIFT and only 3 (0.06%) was confirmed by the specific anti-MERS PPNA. One of the interesting findings was, a donor, who was selected in the control group as a negative anti-MERS IgG ELISA, yield reactive for anti-MERS IgM IIFT and was confirmed with the PPNA. Further, our preliminary results showed that there was a strong cross reactivity between anti- MERS-COV IgG with both HCoV-229E or anti-HKU1 IgG, yet, no cross reactivity of SARS were found. Conclusions: Our findings suggest that MERS-CoV is not heavily circulated among the population of Qatar and this is also indicated by low number of confirmed cases (only 18) since 2012. Additionally, the presence of antibody of other pathogenic human coronavirus may cause false positive results of both ELISA and IIFT, which stress the need for more evaluation studies for the available serological assays. Conclusion: this study provides an insight about the epidemiological view for MERS-CoV in Qatar population. It also provides a performance evaluation for the available serologic tests for MERS-CoV in a view of serologic status to other human coronaviruses. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=seroprevalence" title="seroprevalence">seroprevalence</a>, <a href="https://publications.waset.org/abstracts/search?q=MERS-CoV" title=" MERS-CoV"> MERS-CoV</a>, <a href="https://publications.waset.org/abstracts/search?q=healthy%20individuals" title=" healthy individuals"> healthy individuals</a>, <a href="https://publications.waset.org/abstracts/search?q=Qatar" title=" Qatar"> Qatar</a> </p> <a href="https://publications.waset.org/abstracts/60947/seroprevalence-of-middle-east-respiratory-syndrome-coronavirus-mers-cov-infection-among-healthy-and-high-risk-individuals-in-qatar" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60947.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">269</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">4209</span> Effect of Minerals in Middlings on the Reactivity of Gasification-Coke by Blending a Large Proportion of Long Flame Coal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jianjun%20Wu">Jianjun Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Fanhui%20Guo"> Fanhui Guo</a>, <a href="https://publications.waset.org/abstracts/search?q=Yixin%20Zhang"> Yixin Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, gasification-coke were produced by blending the middlings (MC), and coking coal (CC) and a large proportion of long flame coal (Shenfu coal, SC), the effects of blending ratio were investigated. Mineral evolution and crystalline order obtained by XRD methods were reproduced within reasonable accuracy. Structure characteristics of partially gasification-coke such as surface area and porosity were determined using the N₂ adsorption and mercury porosimetry. Experimental data of gasification-coke was dominated by the TGA results provided trend, reactivity differences between gasification-cokes are discussed in terms of structure characteristic, crystallinity, and alkali index (AI). The first-order reaction equation was suitable for the gasification reaction kinetics of CO₂ atmosphere which was represented by the volumetric reaction model with linear correlation coefficient above 0.985. The differences in the microporous structure of gasification-coke and catalysis caused by the minerals in parent coals were supposed to be the main factors which affect its reactivity. The addition of MC made the samples enriched with a large amount of ash causing a higher surface area and a lower crystalline order to gasification-coke which was beneficial to gasification reaction. The higher SiO₂ and Al₂O₃ contents, causing a decreasing AI value and increasing activation energy, which reduced the gasification reaction activity. It was found that the increasing amount of MC got a better performance on the coke gasification reactivity by blending > 30% SC with this coking process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=low-rank%20coal" title="low-rank coal">low-rank coal</a>, <a href="https://publications.waset.org/abstracts/search?q=middlings" title=" middlings"> middlings</a>, <a href="https://publications.waset.org/abstracts/search?q=structure%20characteristic" title=" structure characteristic"> structure characteristic</a>, <a href="https://publications.waset.org/abstracts/search?q=mineral%20evolution" title=" mineral evolution"> mineral evolution</a>, <a href="https://publications.waset.org/abstracts/search?q=alkali%20index" title=" alkali index"> alkali index</a>, <a href="https://publications.waset.org/abstracts/search?q=gasification-coke" title=" gasification-coke"> gasification-coke</a>, <a href="https://publications.waset.org/abstracts/search?q=gasification%20kinetics" title=" gasification kinetics"> gasification kinetics</a> </p> <a href="https://publications.waset.org/abstracts/100113/effect-of-minerals-in-middlings-on-the-reactivity-of-gasification-coke-by-blending-a-large-proportion-of-long-flame-coal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100113.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">175</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">4208</span> Characterization of the Physicochemical Properties of Raw and Calcined Kaolinitic Clays Using Analytical Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alireza%20Khaloo">Alireza Khaloo</a>, <a href="https://publications.waset.org/abstracts/search?q=Asghar%20Gholizadeh-Vayghan"> Asghar Gholizadeh-Vayghan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present work focuses on the characterization of the physicochemical properties of kaolinitic clays in both raw and calcined (i.e., dehydroxylated) states. The properties investigated included the dehydroxylation temperature, chemical composition and crystalline phases, band types, kaolinite content, vitreous phase, and reactive and unreactive silica and alumina. The thermogravimetric analysis, X-ray diffractometry and infrared spectroscopy results suggest that full dehydroxylation takes place at 639°C, converting kaolinite to reactive metakaolinite (Si₂Al₂O₇). Application of higher temperatures up to 800 °C leads to complete decarbonation of the calcite phase, and the kaolinite converts to mullite at temperatures exceeding 957 °C. Calcination at 639°C was found to cause a 50% increase in the vitreous content of kaolin. Statistically meaningful increases in the reactivity of silica, alumina, calcite and sodium carbonate in kaolin were detected as a result of such thermal treatment. Such increases were found to be 11%, 47%, 240% and 10%, respectively. The ferrite phase, however, showed a 36% decline in reactivity. The proposed approach can be used as an analytical method to determine the viability of the source of kaolinite and proper physical and chemical modifications needed to enhance its suitability for geopolymer production. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=physicochemical%20properties" title="physicochemical properties">physicochemical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=dehydroxylation" title=" dehydroxylation"> dehydroxylation</a>, <a href="https://publications.waset.org/abstracts/search?q=kaolinitic%20clays" title=" kaolinitic clays"> kaolinitic clays</a>, <a href="https://publications.waset.org/abstracts/search?q=kaolinite%20content" title=" kaolinite content"> kaolinite content</a>, <a href="https://publications.waset.org/abstracts/search?q=vitreous%20phase" title=" vitreous phase"> vitreous phase</a>, <a href="https://publications.waset.org/abstracts/search?q=reactivity" title=" reactivity"> reactivity</a> </p> <a href="https://publications.waset.org/abstracts/92591/characterization-of-the-physicochemical-properties-of-raw-and-calcined-kaolinitic-clays-using-analytical-techniques" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92591.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">162</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">4207</span> Reduction Behavior of Some Low-Grade Iron Ores for Application in Blast Furnace</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Heba%20Al-Kelesh">Heba Al-Kelesh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Day after day, high-grade iron ores are consumed. Because of the strong global demand for iron and steel, it has necessitated the utilization of various low-grade iron ores, which are not suitable for direct exploitation in the iron industry. The low-grade ores cannot be dressed using traditional mineral processing methods because of complicated mineral compositions. The present work is aimed to investigate the reducibility of some Egyptian iron ores and concentrates by conditions emulate different blast furnace areas. Representative specimens are collected from El-Gedida–Baharia oasis, Eastern South Aswan, and Eastern desert-wadi Kareem (EDC). Some mineralogical and morphological characterizations are executed. The reactivity arrangement of green samples is Baharia>Aswan>EDC. The presence of magnetite decreased reactivity of EDC. The reducibility of the Aswan sample is lower than Baharia due to the presence of agglomerated metallic grain surrounded by semi-melted phases. Specimens are annealed at 1000ᵒC for 3 hours. After firing, the reducibility of Aswan becomes the lowest due to the formation of fayalite and calcium phosphate phases. The relative attitude for green and ﬁred samples reduced at different conditions are studied. For thermal and top areas, the reactivity of ﬁred samples is greater than green ones, which were conﬁrmed by morphological examinations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=reducibility" title="reducibility">reducibility</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20grade" title=" low grade"> low grade</a>, <a href="https://publications.waset.org/abstracts/search?q=iron%20industry" title=" iron industry"> iron industry</a>, <a href="https://publications.waset.org/abstracts/search?q=blast%20furnace" title=" blast furnace"> blast furnace</a> </p> <a href="https://publications.waset.org/abstracts/111794/reduction-behavior-of-some-low-grade-iron-ores-for-application-in-blast-furnace" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/111794.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">126</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">4206</span> Nanofluid Flow Heat Transfer Through Ducts with Different Cross-Sections</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amir%20Dehshiri">Amir Dehshiri</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Reza%20Salimpour"> Mohammad Reza Salimpour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present article, we investigate experimental laminar forced convective heat transfer specifications of TiO2/water nanofluids through conduits with different cross sections. We check the effects of different parameters such as cross-sectional shape, Reynolds number and concentration of nanoparticles in stable suspension on increasing convective heat transfer by designing and assembling of an experimental apparatus. The results demonstrate adding a little amount of nanoparticles to the base fluid, improves heat transfer behavior in conduits. Moreover, conduit with circular cross-section has better performance compared to the square and triangular cross sections. However, conduits with square and triangular cross sections have more relative heat transfer enhancement than conduit with circular cross section. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanofluid" title="nanofluid">nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=cross-sectional%20shape" title=" cross-sectional shape"> cross-sectional shape</a>, <a href="https://publications.waset.org/abstracts/search?q=TiO2" title=" TiO2"> TiO2</a>, <a href="https://publications.waset.org/abstracts/search?q=convection" title=" convection"> convection</a> </p> <a href="https://publications.waset.org/abstracts/2143/nanofluid-flow-heat-transfer-through-ducts-with-different-cross-sections" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2143.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">450</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">4205</span> Structure-Reactivity Relationship of Some Rhᴵᴵᴵ and Osᴵᴵᴵ Complexes with N-Inert Ligands in Ionic Liquids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jovana%20Bogojeski">Jovana Bogojeski</a>, <a href="https://publications.waset.org/abstracts/search?q=Dusan%20Cocic"> Dusan Cocic</a>, <a href="https://publications.waset.org/abstracts/search?q=Nenad%20Jankovic"> Nenad Jankovic</a>, <a href="https://publications.waset.org/abstracts/search?q=Angelina%20Petrovic"> Angelina Petrovic</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Kinetically-inert transition metal complexes, such as Rh(III) and Os(III) complexes, attract increasing attention as leading scaffolds for the development of potential pharmacological agents due to their inertness and stability. Therefore, we have designed and fully characterized a few novel rhodium(III) and osmium(III) complexes with a tridentate nitrogen−donor chelate system. For some complexes, the crystal X-ray structure analysis was performed. Reactivity of the newly synthesized complexes towards small biomolecules, such as L-methionine (L-Met), guanosine-5’-monophosphate (5’-GMP), and glutathione (GSH) has been examined. Also, the reactivity of these complexes towards the DNA/RNA (Ribonucleic acid) duplexes was investigated. Obtained results show that the newly synthesized complexes exhibit good affinity towards the studied ligands. Results also show that the complexes react faster with the RNA duplex than with the DNA and that in the DNA duplex reaction is faster with 15mer GG than with the 22mer GG. The UV-Vis (Ultraviolet-visible spectroscopy) is absorption spectroscopy, and the EB (Ethidium bromide) displacement studies were used to examine the interaction of these complexes with CT-DNA and BSA (Bovine serum albumin). All studied complex showed good interaction ability with both the DNA and BSA. Furthermore, the DFT (Density-functional theory) calculation and docking studies were performed. The impact of the metal complex on the cytotoxicity was tested by MTT assay (a colorimetric assay for assessing cell metabolic activity) on HCT-116 lines (human colon cancer cell line). In addition, all these tests were repeated in the presence of several water-soluble biologically active ionic liquids. Attained results indicate that the ionic liquids increase the activity of the investigated complexes. All obtained results in this study imply that the introduction of different spectator ligand can be used to improve the reactivity of rhodium(III) and osmium(III) complexes. Finally, these results indicate that the examined complexes show reactivity characteristics needed for potential anti-tumor agents, with possible targets being both the DNA and proteins. Every new contribution in this field is highly warranted due to the current lack of clinically used Metallo-based alternatives to cisplatin. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biomolecules" title="biomolecules">biomolecules</a>, <a href="https://publications.waset.org/abstracts/search?q=ionic%20liquids" title=" ionic liquids"> ionic liquids</a>, <a href="https://publications.waset.org/abstracts/search?q=osmium%28III%29" title=" osmium(III)"> osmium(III)</a>, <a href="https://publications.waset.org/abstracts/search?q=rhodium%28III%29" title=" rhodium(III)"> rhodium(III)</a> </p> <a href="https://publications.waset.org/abstracts/123362/structure-reactivity-relationship-of-some-rh-and-os-complexes-with-n-inert-ligands-in-ionic-liquids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123362.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">4204</span> Theoretical Study of Structural Parameters, Chemical Reactivity and Spectral and Thermodynamical Properties of Organometallic Complexes Containing Zinc, Nickel and Cadmium with Nitrilotriacetic Acid and Tea Ligands: Density Functional Theory Investigation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nour%20El%20Houda%20Bensiradj">Nour El Houda Bensiradj</a>, <a href="https://publications.waset.org/abstracts/search?q=Nafila%20Zouaghi"> Nafila Zouaghi</a>, <a href="https://publications.waset.org/abstracts/search?q=Taha%20Bensiradj"> Taha Bensiradj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The pollution of water resources is characterized by the presence of microorganisms, chemicals, or industrial waste. Generally, this waste generates effluents containing large quantities of heavy metals, making the water unsuitable for consumption and causing the death of aquatic life and associated biodiversity. Currently, it is very important to assess the impact of heavy metals in water pollution as well as the processes for treating and reducing them. Among the methods of water treatment and disinfection, we mention the complexation of metal ions using ligands which serve to precipitate and subsequently eliminate these ions. In this context, we are interested in the study of complexes containing heavy metals such as zinc, nickel, and cadmium, which are present in several industrial discharges and are discharged into water sources. We will use the ligands of triethanolamine (TEA) and nitrilotriacetic acid (NTA). The theoretical study is based on molecular modeling, using the density functional theory (DFT) implemented in the Gaussian 09 program. The geometric and energetic properties of the above complexes will be calculated. Spectral properties such as infrared, as well as reactivity descriptors, and thermodynamic properties such as enthalpy and free enthalpy will also be determined. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heavy%20metals" title="heavy metals">heavy metals</a>, <a href="https://publications.waset.org/abstracts/search?q=NTA" title=" NTA"> NTA</a>, <a href="https://publications.waset.org/abstracts/search?q=TEA" title=" TEA"> TEA</a>, <a href="https://publications.waset.org/abstracts/search?q=DFT" title=" DFT"> DFT</a>, <a href="https://publications.waset.org/abstracts/search?q=IR" title=" IR"> IR</a>, <a href="https://publications.waset.org/abstracts/search?q=reactivity%20descriptors" title=" reactivity descriptors"> reactivity descriptors</a> </p> <a href="https://publications.waset.org/abstracts/156557/theoretical-study-of-structural-parameters-chemical-reactivity-and-spectral-and-thermodynamical-properties-of-organometallic-complexes-containing-zinc-nickel-and-cadmium-with-nitrilotriacetic-acid-and-tea-ligands-density-functional-theory-investigation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/156557.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">101</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">4203</span> New Effect of Duct Cross Sectional Shape on the Nanofluid Flow Heat Transfer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20R.%20Salimpour">Mohammad R. Salimpour</a>, <a href="https://publications.waset.org/abstracts/search?q=Amir%20Dehshiri"> Amir Dehshiri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present article, we investigate experimental laminar forced convective heat transfer specifications of TiO2/water nanofluids through conduits with different cross sections. we check the effects of different parameters such as cross sectional shape, Reynolds number and concentration of nanoparticles in stable suspension on increasing convective heat transfer by designing and assembling of an experimental apparatus. The results demonstrate adding a little amount of nanoparticles to the base fluid, improves heat transfer behavior in conduits. Moreover, conduit with circular cross-section has better performance compared to the square and triangular cross sections. However, conduits with square and triangular cross sections have more relative heat transfer enchantment than conduit with circular cross section. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nano%20fluid" title="nano fluid">nano fluid</a>, <a href="https://publications.waset.org/abstracts/search?q=cross-sectional%20shape" title=" cross-sectional shape"> cross-sectional shape</a>, <a href="https://publications.waset.org/abstracts/search?q=TiO2" title=" TiO2"> TiO2</a>, <a href="https://publications.waset.org/abstracts/search?q=convection" title=" convection"> convection</a> </p> <a href="https://publications.waset.org/abstracts/19769/new-effect-of-duct-cross-sectional-shape-on-the-nanofluid-flow-heat-transfer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19769.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">523</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">4202</span> Effect of Channel Cross Section Shape on Convective Heat Transfer Coefficient of Nanofluid Flow</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Reza%20Salimpour">Mohammad Reza Salimpour</a>, <a href="https://publications.waset.org/abstracts/search?q=Amir%20Dehshiri"> Amir Dehshiri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present article, we investigate experimental laminar forced convective heat transfer specifications of TiO2/water nanofluids through conduits with different cross sections. We check the effects of different parameters such as cross sectional shape, Reynolds number and concentration of nanoparticles in stable suspension on increasing convective heat transfer by designing and assembling of an experimental apparatus. The results demonstrate adding a little amount of nanoparticles to the base fluid improves heat transfer behavior in conduits. Moreover, conduit with circular cross-section has better performance compared to the square and triangular cross sections. However, conduits with square and triangular cross sections have more relative heat transfer enhancement than conduit with circular cross section. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanofluid" title="nanofluid">nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=cross-sectional%20shape" title=" cross-sectional shape"> cross-sectional shape</a>, <a href="https://publications.waset.org/abstracts/search?q=TiO2" title=" TiO2"> TiO2</a>, <a href="https://publications.waset.org/abstracts/search?q=convection" title=" convection"> convection</a> </p> <a href="https://publications.waset.org/abstracts/9657/effect-of-channel-cross-section-shape-on-convective-heat-transfer-coefficient-of-nanofluid-flow" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9657.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">458</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">4201</span> Potential Use of Local Materials as Synthesizing One Part Geopolymer Cement</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Areej%20Almalkawi">Areej Almalkawi</a>, <a href="https://publications.waset.org/abstracts/search?q=Sameer%20Hamadna"> Sameer Hamadna</a>, <a href="https://publications.waset.org/abstracts/search?q=Parviz%20Soroushian"> Parviz Soroushian</a>, <a href="https://publications.waset.org/abstracts/search?q=Nalin%20Darsana"> Nalin Darsana</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The work on indigenous binders in this paper focused on the following indigenous raw materials: red clay, red lava and pumice (as primary aluminosilicate precursors), wood ash and gypsum (as supplementary minerals), and sodium sulfate and lime (as alkali activators). The experimental methods used for evaluation of these indigenous raw materials included laser granulometry, x-ray fluorescence (XRF) spectroscopy, and chemical reactivity. Formulations were devised for transforming these raw materials into alkali aluminosilicate-based hydraulic cements. These formulations were processed into hydraulic cements via simple heating and milling actions to render thermal activation, mechanochemical and size reduction effects. The resulting hydraulic cements were subjected to laser granulometry, heat of hydration and reactivity tests. These cements were also used to prepare mortar mixtures, which were evaluated via performance of compressive strength tests. The measured values of strength were correlated with the reactivity, size distribution and microstructural features of raw materials. Some of the indigenous hydraulic cements produced in this reporting period yielded viable levels of compressive strength. The correlation trends established in this work are being evaluated for development of simple and thorough methods of qualifying indigenous raw materials for use in production of indigenous hydraulic cements. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=one-part%20geopolymer%20cement" title="one-part geopolymer cement">one-part geopolymer cement</a>, <a href="https://publications.waset.org/abstracts/search?q=aluminosilicate%20precursors" title=" aluminosilicate precursors"> aluminosilicate precursors</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20activation" title=" thermal activation"> thermal activation</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanochemical" title=" mechanochemical"> mechanochemical</a> </p> <a href="https://publications.waset.org/abstracts/65941/potential-use-of-local-materials-as-synthesizing-one-part-geopolymer-cement" class="btn btn-primary 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