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Search results for: supramolecular assemblies
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</div> </nav> </div> </header> <main> <div class="container mt-4"> <div class="row"> <div class="col-md-9 mx-auto"> <form method="get" 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="supramolecular assemblies"> <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> 141</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: supramolecular assemblies</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">141</span> Entropically Favoured Through Space Charge Transfer ‘Lighted’ Photosensitizing Assemblies for ‘Metal Free’ Regulated Photooxidation of Alcohols and Aldehydes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gurpreet%20Kaur">Gurpreet Kaur</a>, <a href="https://publications.waset.org/abstracts/search?q=Manoj%20Kumar"> Manoj Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Vandana%20Bhalla"> Vandana Bhalla</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Strong acceptor-weak acceptor system FN-TPy has been designed and synthesized which undergoes solvent dependent self-assembly in mixed aqueous media to generate through space intermolecular charge transfer assemblies. The as prepared entropically favoured assemblies of FN-TPy exhibit excellent photostability and photosensitizing properties in the assembled state to activate aerial oxygen for efficient generation of reactive oxygen species (ROS) through Type-I and Type-II pathways. The FN-TPy assemblies exhibit excellent potential for regulated oxidation of alcohols and aldehydes under mild reaction conditions (visible light irradiation, aqueous media, room temperature) using aerial oxygen as the ‘oxidant’. The present study demonstrates the potential of FN-TPy assemblies to catalyze controlled oxidation of benzyl alcohol to benzaldehyde and to corresponding benzoic acid. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oxidations" title="oxidations">oxidations</a>, <a href="https://publications.waset.org/abstracts/search?q=photosensitizer" title=" photosensitizer"> photosensitizer</a>, <a href="https://publications.waset.org/abstracts/search?q=reactive%20oxygen%20species" title=" reactive oxygen species"> reactive oxygen species</a>, <a href="https://publications.waset.org/abstracts/search?q=supramolecular%20assemblies" title=" supramolecular assemblies"> supramolecular assemblies</a>, <a href="https://publications.waset.org/abstracts/search?q=through%20space%20charge%20transfer." title=" through space charge transfer."> through space charge transfer.</a> </p> <a href="https://publications.waset.org/abstracts/150684/entropically-favoured-through-space-charge-transfer-lighted-photosensitizing-assemblies-for-metal-free-regulated-photooxidation-of-alcohols-and-aldehydes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150684.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">118</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">140</span> Recent Developments in the Internal Arc Test Standard IEC 62271-200 for Switchgear Assemblies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rajaramamohanarao%20Chennu">Rajaramamohanarao Chennu</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Sudhakara%20Reddy"> S. Sudhakara Reddy</a>, <a href="https://publications.waset.org/abstracts/search?q=Gurudev%20T"> Gurudev T</a>, <a href="https://publications.waset.org/abstracts/search?q=Maroti">Maroti</a> </p> <p class="card-text"><strong>Abstract:</strong></p> With the invent of recent available technology and cost optimization, the switchgear assemblies are becoming more compact and designed to operate at critical levels of thermal and dielectric stress. At the same time, the switchgear assemblies shall be designed for protection of persons, met in the event of internal arc for specified installation conditions, according to the latest available national/international standards. These standards are revising regularly for better product design and personal safety. The switchgear assemblies design shall be modified in accordance with the change in requirements in the latest edition of the standards. This paper presents the signifying changes brought in the latest edition of 62271-200:2021 and effect of these changes and the necessitated design improvements for meeting internal arc test requirements is presented by carrying out the internal arc testing experiments on the switchgear assemblies at High Power Laboratory, Central Power Research Institute, Bangalore, India. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=internal%20arc" title="internal arc">internal arc</a>, <a href="https://publications.waset.org/abstracts/search?q=switchgear%20assembly" title=" switchgear assembly"> switchgear assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20speed%20videography" title=" high speed videography"> high speed videography</a>, <a href="https://publications.waset.org/abstracts/search?q=IEC%2062271-200" title=" IEC 62271-200"> IEC 62271-200</a> </p> <a href="https://publications.waset.org/abstracts/143596/recent-developments-in-the-internal-arc-test-standard-iec-62271-200-for-switchgear-assemblies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143596.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">190</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">139</span> Validating Thermal Performance of Existing Wall Assemblies Using In-Situ Measurements</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shibei%20Huang">Shibei Huang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In deep energy retrofits, the thermal performance of existing building envelopes is often difficult to determine with a high level of accuracy. For older buildings, the records of existing assemblies are often incomplete or inaccurate. To obtain greater baseline performance accuracy for energy models, in-field measurement tools can be used to obtain data on the thermal performance of the existing assemblies. For a known assembly, these field measurements assist in validating the U-factor estimates. If the field-measured U-factor consistently varies from the calculated prediction, those measurements prompt further study. For an unknown assembly, successful field measurements can provide approximate U-factor evaluation, validate assumptions, or identify anomalies requiring further investigation. Using case studies, this presentation will focus on the non-destructive methods utilizing a set of various field tools to validate the baseline U-factors for a range of existing buildings with various wall assemblies. The lessons learned cover what can be achieved, the limitations of these approaches and tools, and ideas for improving the validity of measurements. Key factors include the weather conditions, the interior conditions, the thermal mass of the measured assemblies, and the thermal profiles of the assemblies in question. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=existing%20building" title="existing building">existing building</a>, <a href="https://publications.waset.org/abstracts/search?q=sensor" title=" sensor"> sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20analysis" title=" thermal analysis"> thermal analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=retrofit" title=" retrofit"> retrofit</a> </p> <a href="https://publications.waset.org/abstracts/181448/validating-thermal-performance-of-existing-wall-assemblies-using-in-situ-measurements" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/181448.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">63</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">138</span> Analysis of Kinetin Supramolecular Complex with Glytsirrizinic Acid and Based by Mass-Spectrometry Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bakhtishod%20Matmuratov">Bakhtishod Matmuratov</a>, <a href="https://publications.waset.org/abstracts/search?q=Sakhiba%20Madraximova"> Sakhiba Madraximova</a>, <a href="https://publications.waset.org/abstracts/search?q=Rakhmat%20Esanov"> Rakhmat Esanov</a>, <a href="https://publications.waset.org/abstracts/search?q=Alimjan%20Matchanov"> Alimjan Matchanov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Studies have been performed to obtain complexes of glycyrrhizic acid and kinetins in a 2:1 ratio. The complex of glycyrrhizic acid and kinetins in a 2:1 ratio was considered evidence of the formation of a molecular complex by determining the molecular masses using chromato-mass spectroscopy and analyzing the IR spectra. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=monoammonium%20salt%20of%20glycyrrhizic%20acid" title="monoammonium salt of glycyrrhizic acid">monoammonium salt of glycyrrhizic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=glycyrrhizic%20acid" title=" glycyrrhizic acid"> glycyrrhizic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=supramolecular%20complex" title=" supramolecular complex"> supramolecular complex</a>, <a href="https://publications.waset.org/abstracts/search?q=isomolar%20series" title=" isomolar series"> isomolar series</a>, <a href="https://publications.waset.org/abstracts/search?q=IR%20spectroscopy" title=" IR spectroscopy"> IR spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/151906/analysis-of-kinetin-supramolecular-complex-with-glytsirrizinic-acid-and-based-by-mass-spectrometry-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151906.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">177</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">137</span> Synthesis of Novel Metallosurfactants for Drug Delivery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Belghait">Fatima Zohra Belghait</a>, <a href="https://publications.waset.org/abstracts/search?q=Nawal%20Cheikh"> Nawal Cheikh</a>, <a href="https://publications.waset.org/abstracts/search?q=Oscar%20Palacios"> Oscar Palacios</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramon%20Barnadas"> Ramon Barnadas</a>, <a href="https://publications.waset.org/abstracts/search?q=Pau%20Bayon"> Pau Bayon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Metalloporphyrin and its derivatives play an important role in different scientific areas due to its tetradentate vacant site in the center that is suitable for metal coordination. Metalosomes (MTS) are supramolecular aggregates (similar to liposomes) generated by the self-assembly of compounds similar to phospholipids (with a polar and a hydrophobic part), but incorporating, as part of their membrane, molecules that contain bound metals. The aim of our work is to synthesise metalosomes containing catioinc amphiphilic porphyrin and their complexes with Fe and Cu to study their therapeutical applications. All synthesized compounds were confirmed with Dynamic Light Scattering; elemental analysis, Ultraviolet–visible spectroscopy <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=metalloporphyrin" title="metalloporphyrin">metalloporphyrin</a>, <a href="https://publications.waset.org/abstracts/search?q=amphiphilique%20porphyrin" title=" amphiphilique porphyrin"> amphiphilique porphyrin</a>, <a href="https://publications.waset.org/abstracts/search?q=metalosomes" title=" metalosomes"> metalosomes</a>, <a href="https://publications.waset.org/abstracts/search?q=supramolecular" title=" supramolecular"> supramolecular</a> </p> <a href="https://publications.waset.org/abstracts/195168/synthesis-of-novel-metallosurfactants-for-drug-delivery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/195168.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">0</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">136</span> Protection of Human Rights in Europe: The Parliamentary Dimension</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aleksandra%20Chiniaeva">Aleksandra Chiniaeva</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The following paper describes the activity of national and international parliamentary assemblies of the European region in protection and promotion of human rights. It may be said that parliamentarians have a “double mandate” — as members of the international assembly and of their respective national parliaments. In other words, parliamentarization at both international and national level provides a situation for parliamentarians, where they link people, national governments and international organizations. The paper is aimed towards demonstrating that the activity of the main international parliamentary assemblies of the European region have a real positive impact on the human rights situation in the European region. In addition, the paper describes the assemblies that include protection of human rights in their Agenda as one of the main subjects: the EP, the PACE, the OSCE PA and the IPA CIS. Co-operation activities such as joint election observation; participation in inter-parliamentary associations, such as the IPU; conclusion agreements allow assemblies to provide observation of human right situation in the states that are not members of the particular organization and as consequence make their impact broader. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=human%20rights" title="human rights">human rights</a>, <a href="https://publications.waset.org/abstracts/search?q=international%20parliamentary%20assembly" title=" international parliamentary assembly"> international parliamentary assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=IPU" title=" IPU"> IPU</a>, <a href="https://publications.waset.org/abstracts/search?q=EP" title=" EP"> EP</a>, <a href="https://publications.waset.org/abstracts/search?q=PACE" title=" PACE"> PACE</a>, <a href="https://publications.waset.org/abstracts/search?q=OSCE" title=" OSCE"> OSCE</a>, <a href="https://publications.waset.org/abstracts/search?q=international%20election%20observation" title=" international election observation"> international election observation</a> </p> <a href="https://publications.waset.org/abstracts/44535/protection-of-human-rights-in-europe-the-parliamentary-dimension" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44535.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">366</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">135</span> Unbalanced Cylindrical Magnetron for Accelerating Cavities Coating</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20Rosaz">G. Rosaz</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Semblanet"> V. Semblanet</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Calatroni"> S. Calatroni</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Sublet"> A. Sublet</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Taborelli"> M. Taborelli</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We report in this paper the design and qualification of a cylindrical unbalanced magnetron source. The dedicated magnetic assemblies were simulated using a finite element model. A hall-effect magnetic probe was then used to characterize those assemblies and compared to the theoretical magnetic profiles. These show a good agreement between the expected and actual values. The qualification of the different magnetic assemblies was then performed by measuring the ion flux density reaching the surface of the sample to be coated using a commercial retarding field energy analyzer. The strongest unbalanced configuration shows an increase from 0.016 A.cm<sup>-2</sup> to 0.074 A.cm<sup>-2</sup> of the ion flux density reaching the sample surface compared to the standard balanced configuration for a pressure 5.10<sup>-3</sup> mbar and a plasma source power of 300 W. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ion%20energy%20distribution%20function" title="ion energy distribution function">ion energy distribution function</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetron%20sputtering" title=" magnetron sputtering"> magnetron sputtering</a>, <a href="https://publications.waset.org/abstracts/search?q=niobium" title=" niobium"> niobium</a>, <a href="https://publications.waset.org/abstracts/search?q=unbalanced" title=" unbalanced"> unbalanced</a>, <a href="https://publications.waset.org/abstracts/search?q=SRF%20cavities" title=" SRF cavities"> SRF cavities</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20film" title=" thin film"> thin film</a> </p> <a href="https://publications.waset.org/abstracts/44989/unbalanced-cylindrical-magnetron-for-accelerating-cavities-coating" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44989.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">256</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">134</span> Superchaotropicity: Grafted Surface to Probe the Adsorption of Nano-Ions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Raimoana%20Frogier">Raimoana Frogier</a>, <a href="https://publications.waset.org/abstracts/search?q=Luc%20Girard"> Luc Girard</a>, <a href="https://publications.waset.org/abstracts/search?q=Pierre%20Bauduin"> Pierre Bauduin</a>, <a href="https://publications.waset.org/abstracts/search?q=Diane%20Rebiscoul"> Diane Rebiscoul</a>, <a href="https://publications.waset.org/abstracts/search?q=Olivier%20Diat"> Olivier Diat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nano-ions (NIs) are ionic species or clusters of nanometric size. Their low charge density and the delocalization of their charges give special properties to some of NIs belonging to chemical classes of polyoxometalates (POMs) or boron clusters. They have the particularity of interacting non-covalently with neutral hydrated surface or interfaces such as assemblies of surface-active molecules (micelles, vesicles, lyotropic liquid crystals), foam bubbles or emulsion droplets. This makes possible to classify those NIs in the Hofmeister series as superchaotropic ions. The mechanism of adsorption is complex, linked to the simultaneous dehydration of the ion and the molecule or supramolecular assembly with which it can interact, all with an enthalpic gain on the free energy of the system. This interaction process is reversible and is sufficiently pronounced to induce changes in molecular and supramolecular shape or conformation, phase transitions in the liquid phase, all at sub-millimolar ionic concentrations. This new property of some NIs opens up new possibilities for applications in fields as varied as biochemistry for solubilization, recovery of metals of interest by foams in the form of NIs... In order to better understand the physico-chemical mechanisms at the origin of this interaction, we use silicon wafers functionalized by non-ionic oligomers (polyethylene glycol chains or PEG) to study in situ by X-ray reflectivity this interaction of NIs with the grafted chains. This study carried out at ESRF (European Synchrotron Radiation Facility) and has shown that the adsorption of the NIs, such as POMs, has a very fast kinetics. Moreover the distribution of the NIs in the grafted PEG chain layer was quantify. These results are very encouraging and confirm what has been observed on soft interfaces such as micelles or foams. The possibility to play on the density, length and chemical nature of the grafted chains makes this system an ideal tool to provide kinetic and thermodynamic information to decipher the complex mechanisms at the origin of this adsorption. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorption" title="adsorption">adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=nano-ions" title=" nano-ions"> nano-ions</a>, <a href="https://publications.waset.org/abstracts/search?q=solid-liquid%20interface" title=" solid-liquid interface"> solid-liquid interface</a>, <a href="https://publications.waset.org/abstracts/search?q=superchaotropicity" title=" superchaotropicity"> superchaotropicity</a> </p> <a href="https://publications.waset.org/abstracts/165312/superchaotropicity-grafted-surface-to-probe-the-adsorption-of-nano-ions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165312.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">67</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">133</span> Step into the Escalator’s Fractal Behavior by Using the Poincare Map</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Albadri">Ali Albadri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Step band in an escalator moves in a cyclic periodic pattern. Similarly, most if not all of the components and sub-assemblies in the escalator operate in the same way. If you mark up one step in the step band of an escalator and stand next to the escalator, on the incline, to watch the marked-up step when it passes by, you ask yourself, does the marked up step behaves exactly the same way during each revolution when it passes you by again and again? We can say that; there is some similarity in this example and the example when an astronomer watches planets in the sky, and he or she asks himself or herself, does each planet intersects the plan of observation in the same position for every pantry rotation? For a fact, we know for the answer to the second example is no, because scientist, astronomers, and mathematicians have proven that planets deviate from their paths to take new paths during their planetary moves, albeit with minimal change. But what about the answer to the question in the first example? considering that there is increase in the wear and tear of components with time in the step, in the step band, in the tracks and in many other places in the escalator. There is also the accumulation of fatigue in the components and sub-assemblies. This research is part of many studies which we are conducting to address the answer for the question in the first example. We have been using the fractal dimension as a quantities tool and the Poincare map as a qualitative tool. This study has shown that the fractal dimension value and the shape and distribution of the orbits in the Poincare map has significant correlation with the quality of the mechanical components and sub-assemblies in the escalator. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fractal%20dimension" title="fractal dimension">fractal dimension</a>, <a href="https://publications.waset.org/abstracts/search?q=Poincare%20map" title=" Poincare map"> Poincare map</a>, <a href="https://publications.waset.org/abstracts/search?q=rugby%20ball%20orbit" title=" rugby ball orbit"> rugby ball orbit</a>, <a href="https://publications.waset.org/abstracts/search?q=worm%20orbit" title=" worm orbit"> worm orbit</a> </p> <a href="https://publications.waset.org/abstracts/156296/step-into-the-escalators-fractal-behavior-by-using-the-poincare-map" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/156296.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">59</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">132</span> A One Dimensional Cdᴵᴵ Coordination Polymer: Synthesis, Structure and Properties</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Z.%20Derikvand">Z. Derikvand</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Dusek"> M. Dusek</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Eigner"> V. Eigner</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One dimensional coordination polymer of Cdᴵᴵ based on pyrazine (pz) and 3-nitrophthalic acid (3-nphaH₂), namely poly[[diaqua bis(3-nitro-2-carboxylato-1-carboxylic acid)(µ₂-pyrazine) cadmium(II)]dihydrate], {[Cd(3-nphaH)2(pz)(H₂O)₂]. 2H₂O}ₙ was prepared and characterized. The asymmetric unit consists of one Cdᴵᴵ center, two (3-nphaH)– anions, two halves of two crystallographically distinct pz ligands, two coordinated and two uncoordinated water molecules. The Cdᴵᴵ cation is surrounded by four oxygen atoms from two (3-nphaH)– and two water molecules as well as two nitrogen atoms from two pz ligands in distorted octahedral geometry. Complicated hydrogen bonding network accompanied with N–O···π and C–O···π stacking interactions leads to formation of a 3D supramolecular network. Commonly, this kind of C–O–π and N–O···π interaction is detected in electron-rich CO/NO groups of (3-nphaH)– ligand and electron-deficient π-system of pyrazine. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=supramolecular%20chemistry" title="supramolecular chemistry">supramolecular chemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=Cd%20coordination%20polymer" title=" Cd coordination polymer"> Cd coordination polymer</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=3-nithrophethalic%20acid" title=" 3-nithrophethalic acid"> 3-nithrophethalic acid</a> </p> <a href="https://publications.waset.org/abstracts/77598/a-one-dimensional-cd-coordination-polymer-synthesis-structure-and-properties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77598.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">131</span> Structure of Turbulence Flow in the Wire-Wrappes Fuel Assemblies of BREST-OD-300</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dmitry%20V.%20Fomichev">Dmitry V. Fomichev</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20I.%20Solonin"> Vladimir I. Solonin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, experimental and numerical study of hydrodynamic characteristics of the air coolant flow in the test wire-wrapped assembly is presented. The test assembly has 37 rods, which are similar to the real fuel pins of the BREST-OD-300 fuel assemblies geometrically. Air open loop test facility installed at the “Nuclear Power Plants and Installations” department of BMSTU was used to obtain the experimental data. The obtaining altitudinal distribution of static pressure in the near-wall test assembly as well as velocity and temperature distribution of coolant flow in the test sections can give us some new knowledge about the mechanism of formation of the turbulence flow structure in the wire wrapped fuel assemblies. Numerical simulations of the turbulence flow has been accomplished using ANSYS Fluent 14.5. Different non-local turbulence models have been considered, such as standard and RNG k-e models and k-w SST model. Results of numerical simulations of the flow based on the considered turbulence models give the best agreement with the experimental data and help us to carry out strong analysis of flow characteristics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=wire-spaces%20fuel%20assembly" title="wire-spaces fuel assembly">wire-spaces fuel assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulent%20flow%20structure" title=" turbulent flow structure"> turbulent flow structure</a>, <a href="https://publications.waset.org/abstracts/search?q=computation%20fluid%20dynamics" title=" computation fluid dynamics"> computation fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/19315/structure-of-turbulence-flow-in-the-wire-wrappes-fuel-assemblies-of-brest-od-300" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19315.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">459</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">130</span> Carbon Nitride Growth on ZnO Architectures for Enhanced Photoelectrochemical Water Splitting Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=%C5%A0pela%20Hajduk">Špela Hajduk</a>, <a href="https://publications.waset.org/abstracts/search?q=Sean%20P.%20Berglund"> Sean P. Berglund</a>, <a href="https://publications.waset.org/abstracts/search?q=Matejka%20Podlogar"> Matejka Podlogar</a>, <a href="https://publications.waset.org/abstracts/search?q=Goran%20Dra%C5%BEi%C4%87"> Goran Dražić</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatwa%20F.%20Abdi"> Fatwa F. Abdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Zorica%20C.%20Orel"> Zorica C. Orel</a>, <a href="https://publications.waset.org/abstracts/search?q=Menny%20Shalom"> Menny Shalom</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Graphitic carbon nitride materials (g-CN) have emerged as an attractive photocatalyst and electrocatalyst for photo and electrochemical water splitting reaction, due to their environmental benignity nature and suitable band gap. Many approaches were introduced to enhance the photoactivity and electronic properties of g-CN and resulted in significant changes in the electronic and catalytic properties. Here we demonstrate the synthesis of thin and homogenous g-CN layer on highly ordered ZnO nanowire (NW) substrate by growing a seeding layer of small supramolecular assemblies on the nanowires. The new synthetic approach leads to the formation of thin g-CN layer (~3 nm) without blocking all structure. Two different deposition methods of carbon nitride were investigated and will be presented. The amount of loaded carbon nitride significantly influences the PEC activity of hybrid material and all the ZnO/g-CNx electrodes show great improvement in photoactivity. The chemical structure, morphology and optical properties of the deposited g-CN were fully characterized by various techniques as X-ray powder spectroscopy (XRD), scanning electron microscopy (SEM), focused ion beam scanning electron microscopy (FIB-SEM), high-resolution scanning microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nitride" title="carbon nitride">carbon nitride</a>, <a href="https://publications.waset.org/abstracts/search?q=photoanode" title=" photoanode"> photoanode</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20water%20splitting" title=" solar water splitting"> solar water splitting</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20oxide" title=" zinc oxide"> zinc oxide</a> </p> <a href="https://publications.waset.org/abstracts/71217/carbon-nitride-growth-on-zno-architectures-for-enhanced-photoelectrochemical-water-splitting-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71217.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">195</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">129</span> Study of the Behavior of Bolted Joints with and Without Reinforcement</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Karim%20Akkouche">Karim Akkouche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many methods have been developed for characterizing the behavior of bolted joints. However, in the presence of a certain model of stiffeners, no orientation was given in relation to their modeling. To this end, multitude of coarse errors can arise in the reproduction of the propagation of efforts and in representation of the modes of deformations. Considering these particularities, a numerical investigation was carried out in our laboratory. In this paper we will present a comparative study between three types of assemblies. A non-linear 3D modeling was chosen, given that it takes into consideration geometric and material non-linearity, using the Finite Element calculation code ABAQUS. Initially, we evaluated the influence of the presence of each stiffener on the "global" behavior of the assemblies, this by analyzing their Moment-Rotation curves, also by referring to the classification system proposed by NF EN 1993- 1.8 which is based on the resisting moment Mj-Rd and the initial stiffness Sj.int. In a second step, we evaluated the "local" behavior of their components by referring to the stress-strain curves. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=assembly" title="assembly">assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=post-beam" title=" post-beam"> post-beam</a>, <a href="https://publications.waset.org/abstracts/search?q=end%20plate" title=" end plate"> end plate</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinearity" title=" nonlinearity"> nonlinearity</a> </p> <a href="https://publications.waset.org/abstracts/166116/study-of-the-behavior-of-bolted-joints-with-and-without-reinforcement" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166116.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">74</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">128</span> Comparison of Regime Transition between Ellipsoidal and Spherical Particle Assemblies in a Model Shear Cell </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Hossain">M. Hossain</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20P.%20Zhu"> H. P. Zhu</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20B.%20Yu"> A. B. Yu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a numerical investigation of regime transition of flow of ellipsoidal particles and a comparison with that of spherical particle assembly. Particle assemblies constituting spherical and ellipsoidal particle of 2.5:1 aspect ratio are examined at separate instances in similar flow conditions in a shear cell model that is numerically developed based on the discrete element method. Correlations among elastically scaled stress, kinetically scaled stress, coordination number and volume fraction are investigated, and show important similarities and differences for the spherical and ellipsoidal particle assemblies. In particular, volume fractions at points of regime transition are identified for both types of particles. It is found that compared with spherical particle assembly, ellipsoidal particle assembly has higher volume fraction for the quasistatic to intermediate regime transition and lower volume fraction for the intermediate to inertial regime transition. Finally, the relationship between coordination number and volume fraction shows strikingly distinct features for the two cases, suggesting that different from spherical particles, the effect of the shear rate on the coordination number is not significant for ellipsoidal particles. This work provides a glimpse of currently running work on one of the most attractive scopes of research in this field and has a wide prospect in understanding rheology of more complex shaped particles in light of the strong basis of simpler spherical particle rheology. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DEM" title="DEM">DEM</a>, <a href="https://publications.waset.org/abstracts/search?q=granular%20rheology" title=" granular rheology"> granular rheology</a>, <a href="https://publications.waset.org/abstracts/search?q=non-spherical%20particles" title=" non-spherical particles"> non-spherical particles</a>, <a href="https://publications.waset.org/abstracts/search?q=regime%20transition" title=" regime transition"> regime transition</a> </p> <a href="https://publications.waset.org/abstracts/57564/comparison-of-regime-transition-between-ellipsoidal-and-spherical-particle-assemblies-in-a-model-shear-cell" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57564.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">264</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">127</span> A Supramolecular Cocrystal of 2-Amino-4-Chloro-6-Methylpyrimidine with 4-Methylbenzoic Acid: Synthesis, Structural Determinations and Quantum Chemical Investigations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nuridayanti%20Che%20Khalib">Nuridayanti Che Khalib</a>, <a href="https://publications.waset.org/abstracts/search?q=Kaliyaperumal%20Thanigaimani"> Kaliyaperumal Thanigaimani</a>, <a href="https://publications.waset.org/abstracts/search?q=Suhana%20Arshad"> Suhana Arshad</a>, <a href="https://publications.waset.org/abstracts/search?q=Ibrahim%20Abdul%20Razak"> Ibrahim Abdul Razak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The 1:1 co-crystal of 2-amino-4-chloro-6-methylpyrimidine (2A4C6MP) with 4-methylbenzoic acid (4MBA) (I) has been prepared by slow evaporation method in methanol, which was crystallized in monoclinic C2/c space group, Z = 8, a = 28.431 (2) Å, b = 7.3098 (5) Å, c = 14.2622 (10) Å, and β = 109.618 (3)°. The presence of unionized –COOH functional group in co-crystal I was identified both by spectral methods (1H and 13C NMR, FTIR) and X-ray diffraction structural analysis. The 2A4C6MP molecule interact with the carboxylic group of the respective 4MBA molecule through N—H⋯O and O—H⋯N hydrogen bonds, forming a cyclic hydrogen –bonded motif R22(8). The crystal structure was stabilized by Npyrimidine-H⋯O=C and C=O-H⋯Npyrimidine types hydrogen bonding interactions. Theoretical investigations have been computed by HF and density function (B3LYP) method with 6-311+G(d,p) basis set. The vibrational frequencies together with 1H and 13C NMR chemical shifts have been calculated on the fully optimized geometry of co-crystal I. Theoretical calculations are in good agreement with the experimental results. Solvent-free formation of this co-crystal I is confirmed by powder X-ray diffraction analysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=supramolecular%20co-crystal" title="supramolecular co-crystal">supramolecular co-crystal</a>, <a href="https://publications.waset.org/abstracts/search?q=2-amino-4-chloro-6-methylpyrimidine" title=" 2-amino-4-chloro-6-methylpyrimidine"> 2-amino-4-chloro-6-methylpyrimidine</a>, <a href="https://publications.waset.org/abstracts/search?q=Harthree-Fock%20and%20DFT%20studies" title=" Harthree-Fock and DFT studies"> Harthree-Fock and DFT studies</a>, <a href="https://publications.waset.org/abstracts/search?q=spectroscopic%20analysis" title=" spectroscopic analysis"> spectroscopic analysis</a> </p> <a href="https://publications.waset.org/abstracts/33333/a-supramolecular-cocrystal-of-2-amino-4-chloro-6-methylpyrimidine-with-4-methylbenzoic-acid-synthesis-structural-determinations-and-quantum-chemical-investigations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33333.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">309</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">126</span> Experimental and Theoretical Characterization of Supramolecular Complexes between 7-(Diethylamino)Quinoline-2(1H)-One and Cucurbit[7] Uril</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kevin%20A.%20Droguett">Kevin A. Droguett</a>, <a href="https://publications.waset.org/abstracts/search?q=Edwin%20G.%20P%C3%A9rez"> Edwin G. Pérez</a>, <a href="https://publications.waset.org/abstracts/search?q=Denis%20Fuentealba"> Denis Fuentealba</a>, <a href="https://publications.waset.org/abstracts/search?q=Margarita%20E.%20Aliaga"> Margarita E. Aliaga</a>, <a href="https://publications.waset.org/abstracts/search?q=Ang%C3%A9lica%20M.%20Fierro"> Angélica M. Fierro</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Supramolecular chemistry is a field of growing interest. Moreover, studying the formation of host-guest complexes between macrocycles and dyes is highly attractive due to their potential applications. Examples of the above are drug delivery, catalytic process, and sensing, among others. There are different dyes of interest in the literature; one example is the quinolinone derivatives. Those molecules have good optical properties and chemical and thermal stability, making them suitable for developing fluorescent probes. Secondly, several macrocycles can be seen in the literature. One example is the cucurbiturils. This water-soluble macromolecule family has a hydrophobic cavity and two identical carbonyl portals. Additionally, the thermodynamic analysis of those supramolecular systems could help understand the affinity between the host and guest, their interaction, and the main stabilization energy of the complex. In this work, two 7-(diethylamino) quinoline-2 (1H)-one derivative (QD1-2) and their interaction with cucurbit[7]uril (CB[7]) were studied from an experimental and in-silico point of view. For the experimental section, the complexes showed a 1:1 stoichiometry by HRMS-ESI and isothermal titration calorimetry (ITC). The inclusion of the derivatives on the macrocycle lends to an upward shift in the fluorescence intensity, and the pKa value of QD1-2 exhibits almost no variation after the formation of the complex. The thermodynamics of the inclusion complexes was investigated using ITC; the results demonstrate a non-classical hydrophobic effect with a minimum contribution from the entropy term and a constant binding on the order of 106 for both ligands. Additionally, dynamic molecular studies were carried out during 300 ns in an explicit solvent at NTP conditions. Our finding shows that the complex remains stable during the simulation (RMSD ~1 Å), and hydrogen bonds contribute to the stabilization of the systems. Finally, thermodynamic parameters from MMPBSA calculations were obtained to generate new computational insights to compare with experimental results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=host-guest%20complexes" title="host-guest complexes">host-guest complexes</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20dynamics" title=" molecular dynamics"> molecular dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=quinolin-2%281H%29-one%20derivatives%20dyes" title=" quinolin-2(1H)-one derivatives dyes"> quinolin-2(1H)-one derivatives dyes</a>, <a href="https://publications.waset.org/abstracts/search?q=thermodynamics" title=" thermodynamics"> thermodynamics</a> </p> <a href="https://publications.waset.org/abstracts/161151/experimental-and-theoretical-characterization-of-supramolecular-complexes-between-7-diethylaminoquinoline-21h-one-and-cucurbit7-uril" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/161151.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">92</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">125</span> Mesenchymal Stem Cells on Fibrin Assemblies with Growth Factors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elena%20Filova">Elena Filova</a>, <a href="https://publications.waset.org/abstracts/search?q=Ondrej%20Kaplan"> Ondrej Kaplan</a>, <a href="https://publications.waset.org/abstracts/search?q=Marie%20Markova"> Marie Markova</a>, <a href="https://publications.waset.org/abstracts/search?q=Helena%20Dragounova"> Helena Dragounova</a>, <a href="https://publications.waset.org/abstracts/search?q=Roman%20Matejka"> Roman Matejka</a>, <a href="https://publications.waset.org/abstracts/search?q=Eduard%20Brynda"> Eduard Brynda</a>, <a href="https://publications.waset.org/abstracts/search?q=Lucie%20Bacakova"> Lucie Bacakova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Decellularized vessels have been evaluated as small-diameter vascular prostheses. Reseeding autologous cells onto decellularized tissue prior implantation should prolong prostheses function and make them living tissues. Suitable cell types for reseeding are both endothelial cells and bone marrow-derived stem cells, with a capacity for differentiation into smooth muscle cells upon mechanical loading. Endothelial cells assure antithrombogenicity of the vessels and MSCs produce growth factors and, after their differentiation into smooth muscle cells, they are contractile and produce extracellular matrix proteins as well. Fibrin is a natural scaffold, which allows direct cell adhesion based on integrin receptors. It can be prepared autologous. Fibrin can be modified with bound growth factors, such as basic fibroblast growth factor (FGF-2) and vascular endothelial growth factor (VEGF). These modifications in turn make the scaffold more attractive for cells ingrowth into the biological scaffold. The aim of the study was to prepare thin surface-attached fibrin assemblies with bound FGF-2 and VEGF, and to evaluate growth and differentiation of bone marrow-derived mesenchymal stem cells on the fibrin (Fb) assemblies. Following thin surface-attached fibrin assemblies were prepared: Fb, Fb+VEGF, Fb+FGF2, Fb+heparin, Fb+heparin+VEGF, Fb+heparin+FGF2, Fb+heparin+FGF2+VEGF. Cell culture poly-styrene and glass coverslips were used as controls. Human MSCs (passage 3) were seeded at the density of 8800 cells/1.5 mL alpha-MEM medium with 2.5% FS and 200 U/mL aprotinin per well of a 24-well cell culture. The cells have been cultured on the samples for 6 days. Cell densities on day 1, 3, and 6 were analyzed after staining with LIVE/DEAD cytotoxicity/viability assay kit. The differentiation of MSCs is being analyzed using qPCR. On day 1, the highest density of MSCs was observed on Fb+VEGF and Fb+FGF2. On days 3 and 6, there were similar densities on all samples. On day 1, cell morphology was polygonal and spread on all sample. On day 3 and 6, MSCs growing on Fb assemblies with FGF2 became apparently elongated. The evaluation of expression of genes for von Willebrand factor and CD31 (endothelial cells), for alpha-actin (smooth muscle cells), and for alkaline phosphatase (osteoblasts) is in progress. We prepared fibrin assemblies with bound VEGF and FGF-2 that supported attachment and growth of mesenchymal stem cells. The layers are promising for improving the ingrowth of MSCs into the biological scaffold. Supported by the Technology Agency of the Czech Republic TA04011345, and Ministry of Health NT11270-4/2010, and BIOCEV – Biotechnology and Biomedicine Centre of the Academy of Sciences and Charles University” project (CZ.1.05/1.1.00/02.0109), funded by the European Regional Development Fund for their financial supports. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fibrin%20assemblies" title="fibrin assemblies">fibrin assemblies</a>, <a href="https://publications.waset.org/abstracts/search?q=FGF-2" title=" FGF-2"> FGF-2</a>, <a href="https://publications.waset.org/abstracts/search?q=mesenchymal%20stem%20cells" title=" mesenchymal stem cells"> mesenchymal stem cells</a>, <a href="https://publications.waset.org/abstracts/search?q=VEGF" title=" VEGF"> VEGF</a> </p> <a href="https://publications.waset.org/abstracts/49553/mesenchymal-stem-cells-on-fibrin-assemblies-with-growth-factors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49553.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">325</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">124</span> Redox-Mediated Supramolecular Radical Gel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sonam%20Chorol">Sonam Chorol</a>, <a href="https://publications.waset.org/abstracts/search?q=Sharvan%20Kumar"> Sharvan Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Pritam%20Mukhopadhyay"> Pritam Mukhopadhyay</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In biology, supramolecular systems require the use of chemical fuels to stay in sustained nonequilibrium steady states termed dissipative self-assembly in contrast to synthetic self-assembly. Biomimicking these natural dynamic systems, some studies have demonstrated artificial self-assembly under nonequilibrium utilizing various forms of energies (fuel) such as chemical, redox, and pH. Naphthalene diimides (NDIs) are well-known organic molecules in supramolecular architectures with high electron affinity and have applications in controlled electron transfer (ET) reactions, etc. Herein, we report the endergonic ET from tetraphenylborate to highly electron-deficient phosphonium NDI²+ dication to generate NDI•+ radical. The formation of radicals was confirmed by UV-Vis-NIR absorption spectroscopy. Electron-donor and electron-acceptor energy levels were calculated from experimental electrochemistry and theoretical DFT analysis. The HOMO of the electron donor locates below the LUMO of the electro-acceptor. This indicates that electron transfer is endergonic (ΔE°ET = negative). The endergonic ET from NaBPh₄ to NDI²+ dication was achieved thermodynamically by the formation of coupled biphenyl product confirmed by GC-MS analysis. NDI molecule bearing octyl phosphonium at the core and H-bond forming imide moieties at the axial position forms a gel. The rheological properties of purified radical ion NDI⦁+ gels were evaluated. The atomic force microscopy studies reveal the formation of large branching-type networks with a maximum height of 70-80 nm. The endergonic ET from NaBPh₄ to NDI²+ dication was used to design the assembly and disassembly redox reaction cycle using reducing (NaBPh₄) and oxidizing agents (Br₂) as chemical fuels. A part of NaBPh₄ is used to drive assembly, while a fraction of the NaBPh₄ is dissipated by forming a useful product. The system goes back to the disassembled NDI²+ dication state with the addition of Br₂. We think bioinspired dissipative self-assembly is the best approach to developing future lifelike materials with autonomous behavior. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ionic-gel" title="Ionic-gel">Ionic-gel</a>, <a href="https://publications.waset.org/abstracts/search?q=redox-cycle" title=" redox-cycle"> redox-cycle</a>, <a href="https://publications.waset.org/abstracts/search?q=self-assembly" title=" self-assembly"> self-assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=useful%20product" title=" useful product"> useful product</a> </p> <a href="https://publications.waset.org/abstracts/165942/redox-mediated-supramolecular-radical-gel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165942.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">123</span> Probabilistic Safety Assessment of Koeberg Spent Fuel Pool</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sibongiseni%20Thabethe">Sibongiseni Thabethe</a>, <a href="https://publications.waset.org/abstracts/search?q=Ian%20Korir"> Ian Korir</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The effective management of spent fuel pool (SFP) safety has been raised as one of the emerging issues to further enhance nuclear installation safety after the Fukushima accident on March 11, 2011. Before then, SFP safety-related issues have been mainly focused on (a) controlling the configuration of the fuel assemblies in the pool with no loss of pool coolants and (b) ensuring adequate pool storage space to prevent fuel criticality owing to chain reactions of the fission products and the ability for neutron absorption to keep the fuel cool. A probabilistic safety (PSA) assessment was performed using the systems analysis program for hands-on integrated reliability evaluations (SAPHIRE) computer code. Event and fault tree analysis was done to develop a PSA model for the Koeberg SFP. We present preliminary PSA results of events that lead to boiling and cause fuel uncovering, resulting in possible fuel damage in the Koeberg SFP. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=computer%20code" title="computer code">computer code</a>, <a href="https://publications.waset.org/abstracts/search?q=fuel%20assemblies" title=" fuel assemblies"> fuel assemblies</a>, <a href="https://publications.waset.org/abstracts/search?q=probabilistic%20risk%20assessment" title=" probabilistic risk assessment"> probabilistic risk assessment</a>, <a href="https://publications.waset.org/abstracts/search?q=spent%20fuel%20pool" title=" spent fuel pool"> spent fuel pool</a> </p> <a href="https://publications.waset.org/abstracts/131191/probabilistic-safety-assessment-of-koeberg-spent-fuel-pool" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/131191.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">169</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">122</span> Supramolecular Approach towards Novel Applications: Battery, Band Gap and Gas Separation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sudhakara%20Naidu%20Neppalli">Sudhakara Naidu Neppalli</a>, <a href="https://publications.waset.org/abstracts/search?q=Tejas%20S.%20Bhosale"> Tejas S. Bhosale</a> </p> <p class="card-text"><strong>Abstract:</strong></p> It is well known that the block copolymer (BCP) can form a complex molecule, through non-covalent bonds such as hydrogen bond, ionic bond and co-ordination bond, with low molecular weight compound as well as with macromolecules, which provide vast applications, includes the alteration of morphology and properties of polymers. Hence we covered the research that, the importance of non-covalent bonds in increasing the non-favourable segmental interactions of the blocks was well examined by attaching and detaching the bonds between the BCP and additive. We also monitored the phase transition of block copolymer and effective interaction parameter (χeff) for Li-doped polymers using small angle x-ray scattering and transmission electron microscopy. The effective interaction parameter (χeff) between two block components was evaluated using Leibler theory based on the incompressible random phase approximation (RPA) for ionized BCP in a disordered state. Furthermore, conductivity experiments demonstrate that the ionic conductivity in the samples quenched from the different structures is morphology-independent, while it increases with increasing ion salt concentration. Morphological transitions, interaction parameter, and thermal stability also examined in quarternized block copolymer. D-spacing was used to estimate effective interaction parameter (χeff) of block components in weak and strong segregation regimes of ordered phase. Metal-containing polymer has been the topic of great attention in recent years due to their wide range of potential application. Similarly, metal- ligand complex is used as a supramolecular linker between the polymers giving rise to a ‘Metallo-Supramolecule assembly. More precisely, functionalized polymer end capped with 2, 2’:6’, 2”- terpyridine ligand can be selectively complexed with wide range of transition metal ions and then subsequently attached to other terpyridine terminated polymer block. In compare to other supramolecular assembly, BCP involved metallo-supramolecule assembly offers vast applications such as optical activity, electrical conductivity, luminescence and photo refractivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=band%20gap" title="band gap">band gap</a>, <a href="https://publications.waset.org/abstracts/search?q=block%20copolymer" title=" block copolymer"> block copolymer</a>, <a href="https://publications.waset.org/abstracts/search?q=conductivity" title=" conductivity"> conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=interaction%20parameter" title=" interaction parameter"> interaction parameter</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20transition" title=" phase transition"> phase transition</a> </p> <a href="https://publications.waset.org/abstracts/72662/supramolecular-approach-towards-novel-applications-battery-band-gap-and-gas-separation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72662.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">169</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">121</span> Adaptive Assemblies: A Scalable Solution for Atlanta's Affordable Housing Crisis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Claudia%20Aguilar">Claudia Aguilar</a>, <a href="https://publications.waset.org/abstracts/search?q=Amen%20Farooq"> Amen Farooq</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Among other cities in the United States, the city of Atlanta is experiencing levels of growth that surpass anything we have witnessed in the last century. With the surge of population influx, the available housing is practically bursting at the seams. Supply is low, and demand is high. In effect, the average one-bedroom apartment runs for 1,800 dollars per month. The city is desperately seeking new opportunities to provide affordable housing at an expeditious rate. This has been made evident by the recent updates to the city’s zoning. With the recent influx in the housing market, young professionals, in particular millennials, are desperately looking for alternatives to stay within the city. To remedy Atlanta’s affordable housing crisis, the city of Atlanta is planning to introduce 40 thousand of new affordable housing units by 2026. To achieve the urgent need for more affordable housing, the architectural response needs to adapt to overcome this goal. A method that has proven successful in modern housing is to practice modular means of development. A method that has been constrained to the dimensions of the max load for an eighteen-wheeler. This approach has diluted the architect’s ability to produce site-specific, informed design and rather contributes to the “cookie cutter” stigma that the method has been labeled with. This thesis explores the design methodology for modular housing by revisiting its constructability and adaptability. This research focuses on a modular housing type that could break away from the constraints of transport and deliver adaptive reconfigurable assemblies. The adaptive assemblies represent an integrated design strategy for assembling the future of affordable dwelling units. The goal is to take advantage of a component-based system and explore a scalable solution to modular housing. This proposal aims specifically to design a kit of parts that are made to be easily transported and assembled but also gives the ability to customize the use of components to benefit all unique conditions. The benefits of this concept could include decreased construction time, cost, on-site labor, and disruption while providing quality housing with affordable and flexible options. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adaptive%20assemblies" title="adaptive assemblies">adaptive assemblies</a>, <a href="https://publications.waset.org/abstracts/search?q=modular%20architecture" title=" modular architecture"> modular architecture</a>, <a href="https://publications.waset.org/abstracts/search?q=adaptability" title=" adaptability"> adaptability</a>, <a href="https://publications.waset.org/abstracts/search?q=constructibility" title=" constructibility"> constructibility</a>, <a href="https://publications.waset.org/abstracts/search?q=kit%20of%20parts" title=" kit of parts"> kit of parts</a> </p> <a href="https://publications.waset.org/abstracts/164743/adaptive-assemblies-a-scalable-solution-for-atlantas-affordable-housing-crisis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/164743.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">85</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">120</span> Aggregation-Induced-Active Stimuli-Responsive Based Nano-Objects for Wastewater Treatment Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Parvaneh%20Eskandari">Parvaneh Eskandari</a>, <a href="https://publications.waset.org/abstracts/search?q=Rachel%20O%27Reilly"> Rachel O'Reilly</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the last years, controlling the self-assembly behavior of stimuli-responsive nano-objects, including micelles, vesicles, worm-like, etc., at different conditions is considered a pertinent challenge in the polymer community. The aim of the project was to synthesize aggregation-induced emission (AIE)-active stimuli-responsive polymeric nano-objects to control the self-assemblies morphologies of the prepared nano-objects. Two types of nanoobjects, micelle and vesicles, including PDMAEMA-b-P(BzMA-TPEMA) [PDMAEMA: poly(N,Ndimethylaminoethyl methacrylate); P(BzMA-TPEMA): poly[benzyl methacrylate-co- tetraphenylethene methacrylate]] were synthesized by using reversible addition−fragmentation chain-transfer (RAFT)- mediated polymerization-induced self-assembly (PISA), which combines polymerization and self-assembly in a single step. Transmission electron microscope and dynamic light scattering (DLS) analysis were used to confirm the formed self-assemblies morphologies. The controlled self-assemblies were applied as nitrophenolic compounds (NPCs) adsorbents from wastewater, thanks to their CO2-responsive part, PDMAEMA. Moreover, the fluorescence-active part of the prepared nano-objects, P(BzMA-TPEMA), played a key role in the detection of the NPCs at the aqueous solution. The optical properties of the prepared nano-objects were studied by UV/Vis and fluorescence spectroscopies. For responsivity investigations, the hydrodynamic diameter and Zeta-potential (ζ-potential) of the sample's aqueous solution were measured by DLS. In the end, the prepared nano-objects were used for the detection and adsorption of different NPCs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aggregation-induced%20emission%20polymers" title="aggregation-induced emission polymers">aggregation-induced emission polymers</a>, <a href="https://publications.waset.org/abstracts/search?q=stimuli-responsive%20polymers" title=" stimuli-responsive polymers"> stimuli-responsive polymers</a>, <a href="https://publications.waset.org/abstracts/search?q=reversible%20addition%E2%88%92fragmentation%20chain-transfer%20polymerization" title=" reversible addition−fragmentation chain-transfer polymerization"> reversible addition−fragmentation chain-transfer polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=polymerization-induced%20self-assembly" title=" polymerization-induced self-assembly"> polymerization-induced self-assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater%20treatment" title=" wastewater treatment"> wastewater treatment</a> </p> <a href="https://publications.waset.org/abstracts/172871/aggregation-induced-active-stimuli-responsive-based-nano-objects-for-wastewater-treatment-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172871.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">73</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">119</span> Influence of Molecular and Supramolecular Structure on Thermally Stimulated Short-Circuit Currents in Polyvinylidene Fluoride Films</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Temnov%20D.">Temnov D.</a>, <a href="https://publications.waset.org/abstracts/search?q=Volgina%20E."> Volgina E.</a>, <a href="https://publications.waset.org/abstracts/search?q=Gerasimov%20D."> Gerasimov D.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Relaxation processes in polyvinylidene fluoride (PVDF) films were studied by the method of thermally stimulated fractional polarization currents (TSTF). The films were obtained by extrusion of a polymer melt followed by isometric annealing. PVDF granules of the Kynar-720 brand (Atofina Chemicals, USA) with a molecular weight of Mw=190,000 g•mol-1 were used for the manufacture of films. The annealing temperature was varied in the range from 120 °C to 170 °C in increments of 10 °C. The dependences of the degree of crystallinity of films (χ) and the intensity of thermally stimulated depolarization currents on the annealing temperature (Toc) are investigated. The TSTF spectra were obtained at the TSC II facility (Setaram, France). Measurements were carried out in a helium atmosphere, and the values of currents were determined by a Keithley electrometer. The annealed PVDF films were polarized at an electric field strength of 100 V/mm at a temperature of 31°C, after which they were cooled to 26°C, at which they were kept for 1 minute. During depolarization, the external field was removed, and the short-circuit sample was cooled to 0°C. The thermally stimulated short-circuit current was recorded during linear heating. Relaxation processes in PVDF films were studied in the temperature range from 0 – 70 °C. It is shown that the intensity curve of the peaks of TST FP has a course that is the reverse of the dependence of the degree of crystallinity on the annealing temperature. This allows us to conclude that the relaxation processes occurring in PVDF in the 35°C region are associated with the amorphous part of the structure of PVDF films between the layers of the spherulite crystalline phase. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=molecular%20and%20supramolecular%20structure" title="molecular and supramolecular structure">molecular and supramolecular structure</a>, <a href="https://publications.waset.org/abstracts/search?q=thermally%20stimulated%20currents" title=" thermally stimulated currents"> thermally stimulated currents</a>, <a href="https://publications.waset.org/abstracts/search?q=polyvinylidene%20fluoride%20films" title=" polyvinylidene fluoride films"> polyvinylidene fluoride films</a>, <a href="https://publications.waset.org/abstracts/search?q=relaxation%20processes" title=" relaxation processes"> relaxation processes</a> </p> <a href="https://publications.waset.org/abstracts/182791/influence-of-molecular-and-supramolecular-structure-on-thermally-stimulated-short-circuit-currents-in-polyvinylidene-fluoride-films" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182791.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">47</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">118</span> Charge Transport in Biological Molecules</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20L.%20Albuquerque">E. L. Albuquerque</a>, <a href="https://publications.waset.org/abstracts/search?q=U.%20L.%20Fulco"> U. L. Fulco</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20S.%20Ourique"> G. S. Ourique</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The focus of this work is on the numerical investigation of the charge transport properties of the de novo-designed alpha3 polypeptide, as well as in its variants, all of them probed by gene engineering. The theoretical framework makes use of a tight-binding model Hamiltonian, together with ab-initio calculations within quantum chemistry simulation. The alpha3 polypeptide is a 21-residue with three repeats of the seven-residue amino acid sequence Leu-Glu-Thr-Leu-Ala-Lys-Ala, forming an alpha–helical bundle structure. Its variants are obtained by Ala→Gln substitution at the e (5th) and g (7th) position, respectively, of the alpha3 polypeptide amino acid sequence. Using transmission electron microscopy and atomic force microscopy, it was observed that the alpha3 polypeptide and one of its variant do have the ability to form fibrous assemblies, while the other does not. Our main aim is to investigate whether or not the biased alpha3 polypeptide and its variants can be also identified by quantum charge transport measurements through current-voltage (IxV) curves as a pattern to characterize their fibrous assemblies. It was observed that each peptide has a characteristic current pattern, which may be distinguished by charge transport measurements, suggesting that it might be a useful tool for the development of biosensors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=charge%20transport%20properties" title="charge transport properties">charge transport properties</a>, <a href="https://publications.waset.org/abstracts/search?q=electronic%20transmittance" title=" electronic transmittance"> electronic transmittance</a>, <a href="https://publications.waset.org/abstracts/search?q=current-voltage%20characteristics" title=" current-voltage characteristics"> current-voltage characteristics</a>, <a href="https://publications.waset.org/abstracts/search?q=biological%20sensor" title=" biological sensor"> biological sensor</a> </p> <a href="https://publications.waset.org/abstracts/46650/charge-transport-in-biological-molecules" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46650.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">665</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">117</span> Cocrystal of Mesalamine for Enhancement of Its Biopharmaceutical Properties, Utilizing Supramolecular Chemistry Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Akshita%20Jindal">Akshita Jindal</a>, <a href="https://publications.waset.org/abstracts/search?q=Renu%20Chadha"> Renu Chadha</a>, <a href="https://publications.waset.org/abstracts/search?q=Maninder%20Karan"> Maninder Karan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Supramolecular chemistry has gained recent eminence in a flurry of research documents demonstrating the formation of new crystalline forms with potentially advantageous characteristics. Mesalamine (5-amino salicylic acid) belongs to anti-inflammatory class of drugs, is used to treat ulcerative colitis and Crohn’s disease. Unfortunately, mesalamine suffer from poor solubility and therefore very low bioavailability. This work is focused on preparation and characterization of cocrystal of mesalamine with nicotinamide (MNIC) a coformer of GRAS status. Cocrystallisation was achieved by solvent drop grinding in stoichiometric ratio of 1:1 using acetonitrile as solvent and was characterized by various techniques including DSC (Differential Scanning Calorimetry), PXRD (X-ray Powder Diffraction), and FTIR (Fourier Transform Infrared Spectrometer). The co-crystal depicted single endothermic transitions (254°C) which were different from the melting peaks of both drug (288°C) and coformer (128°C) indicating the formation of a new solid phase. Different XRPD patterns and FTIR spectrums for the co-crystals from those of individual components confirms the formation of new phase. Enhancement in apparent solubility study and intrinsic dissolution study showed effectiveness of this cocrystal. Further improvement in pharmacokinetic profile has also been observed with 2 folds increase in bioavailability. To conclude, our results show that application of nicotinamide as a coformer is a viable approach towards the preparation of cocrystals of potential drug molecule having limited solubility. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cocrystal" title="cocrystal">cocrystal</a>, <a href="https://publications.waset.org/abstracts/search?q=mesalamine" title=" mesalamine"> mesalamine</a>, <a href="https://publications.waset.org/abstracts/search?q=nicotinamide" title=" nicotinamide"> nicotinamide</a>, <a href="https://publications.waset.org/abstracts/search?q=solvent%20drop%20grinding" title=" solvent drop grinding"> solvent drop grinding</a> </p> <a href="https://publications.waset.org/abstracts/108366/cocrystal-of-mesalamine-for-enhancement-of-its-biopharmaceutical-properties-utilizing-supramolecular-chemistry-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108366.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">177</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">116</span> Influence of Electrode Assembly on Catalytic Activation and Deactivation of a PT Film Immobilized H+ Conducting Solid Electrolyte in Electrocatalytic Reduction Reactions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Hasnat">M. A. Hasnat</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Amirul%20Islam"> M. Amirul Islam</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Rashed"> M. A. Rashed</a>, <a href="https://publications.waset.org/abstracts/search?q=Jamil.%20Safwan"> Jamil. Safwan</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mahabubul%20Alam"> M. Mahabubul Alam </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Symmetric (Cu–Pt|Nafion|Pt–Cu) and asymmetric(Pt|Nafion|Pt–Cu) assemblies were fabricated to study the nitrate reduction processes at the cathode. The electrocatalytic nitrate reduction reactions were performed in these assemblies in order to investigate the prerequisite for the enhanced catalytic activity, electrochemical cell durability as well as preferable product selectivity resulting from the reduction of nitrate at the cathode. It has been observed for the symmetric assembly that Cu particles were oxidized on the anode surface under an applied potential and the resulting copper ions migrated to the cathode surface through the Nafion membrane, which deposited as copper oxide on the cathode surface. The formation of this copper oxide covering layer on the Pt–Cu cathode surface is attributed as the reason for the deactivation of the cathode that governed the reduced nitrate reduction along with increasing nitrite selectivity. These problems were addressed and resolved with the asymmetric design of the electrocatalytic reactor, where enhanced hydrogen evolution activates the surface by eroding the CuO over layer as well as speeding up the slow rate determining hydrogenation reactions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane" title="membrane">membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=nitrate" title=" nitrate"> nitrate</a>, <a href="https://publications.waset.org/abstracts/search?q=electrocatalysis" title=" electrocatalysis"> electrocatalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=voltammetry" title=" voltammetry"> voltammetry</a>, <a href="https://publications.waset.org/abstracts/search?q=electrolysis" title=" electrolysis"> electrolysis</a> </p> <a href="https://publications.waset.org/abstracts/40350/influence-of-electrode-assembly-on-catalytic-activation-and-deactivation-of-a-pt-film-immobilized-h-conducting-solid-electrolyte-in-electrocatalytic-reduction-reactions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40350.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">268</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">115</span> Comparison of Performance of Proton Exchange Membrane Fuel Cell Membrane Electrode Assemblies Prepared from 10 and 15-Micron Proton Exchange Membranes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yingjeng%20James%20Li">Yingjeng James Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Chiao-Chih%20Hu"> Chiao-Chih Hu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Membrane electrode assemblies (MEAs) for proton exchange membrane fuel cell (PEMFC) applications were prepared by using 10 and 15 um PEMs. Except for different membrane thicknesses, these MEAs were prepared by the same conditions. They were prepared by using catalyst coated membrane (CCM) process. The catalyst employed is 40% Pt/C, and the Pt loading is 0.5mg/cm² for the sum of anode and cathode. Active area of the MEAs employed in this study is 5cm*5cm=25cm². In polarization measurements, the flow rates were always set at 1.2 stoic for anode and 3.0 stoic for cathode. The outlets were in open-end mode. The flow filed is tri-serpentine design. The cell temperatures and the humidification conditions were varied for the purpose of MEA performance observations. It was found that the performance of these two types of MEAs is about the same at fully or partially humidified operation conditions; however, 10um MEA exhibits higher current density in dry or low humidified conditions. For example, at 70C cell, 100% RH, and 0.6V condition, both MEAs have similar current density which is 1320 and 1342mA/cm² for 15um and 10um product, respectively. However, when in operation without external humidification, 10um MEA can produce 1085mA/cm²; whereas 15um MEA produces only 720mA/cm². <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fuel%20cell" title="fuel cell">fuel cell</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20electrode%20assembly" title=" membrane electrode assembly"> membrane electrode assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=PEFC" title=" PEFC"> PEFC</a>, <a href="https://publications.waset.org/abstracts/search?q=PEMFC" title=" PEMFC"> PEMFC</a>, <a href="https://publications.waset.org/abstracts/search?q=proton%20exchange%20membrane" title=" proton exchange membrane"> proton exchange membrane</a> </p> <a href="https://publications.waset.org/abstracts/86110/comparison-of-performance-of-proton-exchange-membrane-fuel-cell-membrane-electrode-assemblies-prepared-from-10-and-15-micron-proton-exchange-membranes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86110.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">241</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">114</span> Formation of the Water Assisted Supramolecular Assembly in the Transition Structure of Organocatalytic Asymmetric Aldol Reaction: A DFT Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kuheli%20Chakrabarty">Kuheli Chakrabarty</a>, <a href="https://publications.waset.org/abstracts/search?q=Animesh%20Ghosh"> Animesh Ghosh</a>, <a href="https://publications.waset.org/abstracts/search?q=Atanu%20Roy"> Atanu Roy</a>, <a href="https://publications.waset.org/abstracts/search?q=Gourab%20Kanti%20Das"> Gourab Kanti Das</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aldol reaction is an important class of carbon-carbon bond forming reactions. One of the popular ways to impose asymmetry in aldol reaction is the introduction of chiral auxiliary that binds the approaching reactants and create dissymmetry in the reaction environment, which finally evolves to enantiomeric excess in the aldol products. The last decade witnesses the usage of natural amino acids as chiral auxiliary to control the stereoselectivity in various carbon-carbon bond forming processes. In this context, L-proline was found to be an effective organocatalyst in asymmetric aldol additions. In last few decades the use of water as solvent or co-solvent in asymmetric organocatalytic reaction is increased sharply. Simple amino acids like L-proline does not catalyze asymmetric aldol reaction in aqueous medium not only that, In organic solvent medium high catalytic loading (~30 mol%) is required to achieve moderate to high asymmetric induction. In this context, huge efforts have been made to modify L-proline and 4-hydroxy-L-proline to prepare organocatalyst for aqueous medium asymmetric aldol reaction. Here, we report the result of our DFT calculations on asymmetric aldol reaction of benzaldehyde, p-NO2 benzaldehyde and t-butyraldehyde with a number of ketones using L-proline hydrazide as organocatalyst in wet solvent free condition. Gaussian 09 program package and Gauss View program were used for the present work. Geometry optimizations were performed using B3LYP hybrid functional and 6-31G(d,p) basis set. Transition structures were confirmed by hessian calculation and IRC calculation. As the reactions were carried out in solvent free condition, No solvent effect were studied theoretically. Present study has revealed for the first time, the direct involvement of two water molecules in the aldol transition structures. In the TS, the enamine and the aldehyde is connected through hydrogen bonding by the assistance of two intervening water molecules forming a supramolecular network. Formation of this type of supramolecular assembly is possible due to the presence of protonated -NH2 group in the L-proline hydrazide moiety, which is responsible for the favorable entropy contribution to the aldol reaction. It is also revealed from the present study that, water assisted TS is energetically more favorable than the TS without involving any water molecule. It can be concluded from this study that, insertion of polar group capable of hydrogen bond formation in the L-proline skeleton can lead to a favorable aldol reaction with significantly high enantiomeric excess in wet solvent free condition by reducing the activation barrier of this reaction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aldol%20reaction" title="aldol reaction">aldol reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=DFT" title=" DFT"> DFT</a>, <a href="https://publications.waset.org/abstracts/search?q=organocatalysis" title=" organocatalysis"> organocatalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=transition%20structure" title=" transition structure "> transition structure </a> </p> <a href="https://publications.waset.org/abstracts/25023/formation-of-the-water-assisted-supramolecular-assembly-in-the-transition-structure-of-organocatalytic-asymmetric-aldol-reaction-a-dft-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25023.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">435</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">113</span> Fluorescence Resonance Energy Transfer in a Supramolecular Assembly of Luminescent Silver Nanoclusters and Cucurbit[8]uril Based Host-Guest System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Srikrishna%20Pramanik">Srikrishna Pramanik</a>, <a href="https://publications.waset.org/abstracts/search?q=Sree%20Chithra"> Sree Chithra</a>, <a href="https://publications.waset.org/abstracts/search?q=Saurabh%20Rai"> Saurabh Rai</a>, <a href="https://publications.waset.org/abstracts/search?q=Sameeksha%20Agrawal"> Sameeksha Agrawal</a>, <a href="https://publications.waset.org/abstracts/search?q=Debanggana%20Shil"> Debanggana Shil</a>, <a href="https://publications.waset.org/abstracts/search?q=Saptarshi%20Mukherjee"> Saptarshi Mukherjee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The understanding of interactions between organic chromophores and biologically useful luminescent noble metal nanoclusters (NCs) leading to an energy transfer process that has applications in light-harvesting materials is still in its nascent stage. This work describes a photoluminescent supramolecular assembly, made in two stages, employing an energy transfer process between silver (Ag) NCs as the donor and a host-guest system as the acceptor that can find potential applications in diverse fields. Initially, we explored the host-guest chemistry between a cationic guest, Ethidium Bromide and the anionic host Cucurbit[8]uril using spectroscopic and calorimetric techniques to decipher their interaction mechanism in modulating photophysical properties of the chromophore. Next, we synthesized a series of blue-emitting AgNCs using different templates such as protein, peptides, and cyclodextrin. The as-prepared AgNCs were characterized by various spectroscopic techniques. We have established that these AgNCs can be employed as donors in the FRET process with the above acceptor for FRET-based emission color tuning. Our in-depth studies revealed that surface ligands play a key role in modulating FRET efficiency. Overall, by employing a non-covalent strategy, we have tried to develop FRET pairs using blue-emitting NCs and a host-guest complex, which could find potential applications in constructing advanced white light-emitting, anti-counterfeiting materials, and developing biosensors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=absorption%20spectroscopy" title="absorption spectroscopy">absorption spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=cavities" title=" cavities"> cavities</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20transfer" title=" energy transfer"> energy transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=fluorescence" title=" fluorescence"> fluorescence</a>, <a href="https://publications.waset.org/abstracts/search?q=fluorescence%20resonance%20energy%20transfer" title=" fluorescence resonance energy transfer"> fluorescence resonance energy transfer</a> </p> <a href="https://publications.waset.org/abstracts/185919/fluorescence-resonance-energy-transfer-in-a-supramolecular-assembly-of-luminescent-silver-nanoclusters-and-cucurbit8uril-based-host-guest-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185919.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">47</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">112</span> Separation of Lanthanides Ions from Mineral Waste with Functionalized Pillar[5]Arenes: Synthesis, Physicochemical Characterization and Molecular Dynamics Studies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ariesny%20Vera">Ariesny Vera</a>, <a href="https://publications.waset.org/abstracts/search?q=Rodrigo%20Montecinos"> Rodrigo Montecinos</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The rare-earth elements (REEs) or rare-earth metals (REMs), correspond to seventeen chemical elements composed by the fifteen lanthanoids, as well as scandium and yttrium. Lanthanoids corresponds to lanthanum and the f-block elements, from cerium to lutetium. Scandium and yttrium are considered rare-earth elements because they have ionic radii similar to the lighter f-block elements. These elements were called rare earths because they are simply more difficult to extract and separate individually than the most metals and, generally, they do not accumulate in minerals, they are rarely found in easily mined ores and are often unfavorably distributed in common ores/minerals. REEs show unique chemical and physical properties, in comparison to the other metals in the periodic table. Nowadays, these physicochemical properties are utilized in a wide range of synthetic, catalytic, electronic, medicinal, and military applications. Because of their applications, the global demand for rare earth metals is becoming progressively more important in the transition to a self-sustaining society and greener economy. However, due to the difficult separation between lanthanoid ions, the high cost and pollution of these processes, the scientists search the development of a method that combines selectivity and quantitative separation of lanthanoids from the leaching liquor, while being more economical and environmentally friendly processes. This motivation has favored the design and development of more efficient and environmentally friendly cation extractors with the incorporation of compounds as ionic liquids, membrane inclusion polymers (PIM) and supramolecular systems. Supramolecular chemistry focuses on the development of host-guest systems, in which a host molecule can recognize and bind a certain guest molecule or ion. Normally, the formation of a host-guest complex involves non-covalent interactions Additionally, host-guest interactions can be influenced among others effects by the structural nature of host and guests. The different macrocyclic hosts for lanthanoid species that have been studied are crown ethers, cyclodextrins, cucurbituryls, calixarenes and pillararenes.Among all the factors that can influence and affect lanthanoid (III) coordination, perhaps the most basic of them is the systematic control using macrocyclic substituents that promote a selective coordination. In this sense, macrocycles pillar[n]arenes (P[n]As) present a relatively easy functionalization and they have more π-rich cavity than other host molecules. This gives to P[n]As a negative electrostatic potential in the cavity which would be responsible for the selectivity of these compounds towards cations. Furthermore, the cavity size, the linker, and the functional groups of the polar headgroups could be modified in order to control the association of lanthanoid cations. In this sense, different P[n]As systems, specifically derivatives of the pentamer P[5]A functionalized with amide, amine, phosphate and sulfate derivatives, have been designed in terms of experimental synthesis and molecular dynamics, and the interaction between these P[5]As and some lanthanoid ions such as La³+, Eu³+ and Lu³+ has been studied by physicochemical characterization by 1H-NMR, ITC and fluorescence in the case of Eu³+ systems. The molecular dynamics study of these systems was developed in hexane as solvent, also taking into account the lanthanoid ions mentioned above, and the respective comparison studies between the different ions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lanthanoids" title="lanthanoids">lanthanoids</a>, <a href="https://publications.waset.org/abstracts/search?q=macrocycles" title=" macrocycles"> macrocycles</a>, <a href="https://publications.waset.org/abstracts/search?q=pillar%5Bn%5Darenes" title=" pillar[n]arenes"> pillar[n]arenes</a>, <a href="https://publications.waset.org/abstracts/search?q=rare-earth%20metal%20extraction" title=" rare-earth metal extraction"> rare-earth metal extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=supramolecular%20chemistry" title=" supramolecular chemistry"> supramolecular chemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=supramolecular%20complexes." title=" supramolecular complexes."> supramolecular complexes.</a> </p> <a href="https://publications.waset.org/abstracts/164684/separation-of-lanthanides-ions-from-mineral-waste-with-functionalized-pillar5arenes-synthesis-physicochemical-characterization-and-molecular-dynamics-studies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/164684.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">77</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">‹</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=supramolecular%20assemblies&page=2">2</a></li> <li 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