First International Conference on MOLDAVIAN RISKS – FROM ...

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<strong>First</strong> <strong>International</strong> <strong>Conference</strong> on MOLDAVIAN RISKS - FROM GLOBAL TO LOCAL SCALE 16-19 May 2012, Bacau, Romania A COMPARISON OF GPS SOLUTIONS FOR STRAIN AND SKS FAST DIRECTIONS: IMPLICATIONS FOR MODES OF SHEAR IN THE MANTLE OF A PLATE BOUNDARY ZONE Nicolas Houlié 1 , Tim Stern 2 , Calum Chamberlain 3 1 University of Leeds, UK – ETH, Zurich 2 University of Victoria, Wellington, NZ 3 University of Leeds, UK Corresponding author: Nicolas Houlié, n.houlie@leeds.ac.uk Abstract: The strain rate field for New Zealand is computed using the GPS dataset from GEONET (NZ) collected during the last decade. Two contrasting domains for shear in the mantle are inferred by comparing the principal shortening direction with the fast direction of shear wave splitting. We interpret the mantle beneath the central-southern part of the South Island to have a significant component of pure shear linked to thickening of both the crust and mantle lithosphere. To the north, in contrast, simple shear is dominant. We will present potentials applications for the mantle dynamics of Western USA and Central Europe. Figure 1: Comparison between shortening axes (GPS, red) and axis of fast polarisation (SKS, blue). Key words: Lithosphere – Seismology – GPS – Strain – SKS -- Deformation. 44
<strong>First</strong> <strong>International</strong> <strong>Conference</strong> on MOLDAVIAN RISKS - FROM GLOBAL TO LOCAL SCALE 16-19 May 2012, Bacau, Romania SYNERGISTIC EFFECT FOR THE RETENTION OF METAL CATIONS OBTAINED BY A COMPLEX ORGANIC - INORGANIC COMPOUND OF DIFFERENT TYPES OF CLAY Ileana Denisa Nistor, Gheorghe Surpateanu, Neculai Doru Miron, Anca Ciobanu, Iuliana Mihaela Lazar 1 ”Vasile Alecsandri” University of Bacau, Department of Chemical and Food Engineering Corresponding author: Ileana Denisa Nistor, denisanistor@yahoo.com Abstract: Hybrid materials cover a wide range of compounds with diverse potential applications. Indeed, these materials have the advantage of combining the properties of the organic component with the inorganic component leading us to expect a synergy between these two properties. The inorganic component of the material is formed by cationic or anionic clays: montmorillonite or layerd double hydroxides and the organic component of hybrid material is represented by organic compounds like: chitosan, dendrimers, and pharmaceutical substances. The first part of this works presents a complex organic - inorganic compound of montmorillonite and organic substances intercalated like chitosan and poliol dendrimers. When used simultaneously chitosan and montmorillonite, there is a strong synergy phenomenon, probably due to interactions between the main properties. We can have a first conclusion: the hybrid materials can develop interesting synergistic properties and the field of hybrid materials deserves all the attention possible in future. There are a major concerns and attempts to capture carbon dioxide emissions released in the majority industrial and other types of activities. We propose in this work to solve this problem using hybrid material. The research opens up new prospects for the class of hybrid materials like organic - inorganic, with an enhanced carbon dioxide retention capacity. Another material type polyol dendrimers-montmorillonite has a high retention capacity for carbon dioxide and it can also be regenerated by heating low. The second part presents the hybrid materials formed by layerd double hydroxides with cloramphenicol and salicylate in the interlayer space. These materials were analyzed by thermogravimetric analysis, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), powerful nondestructive. The kinetic parameters (reaction order n) the apparent activation energy (Ea) and pre-exponential factor were calculated using the Coats - Redfern. We also determined the effects of compensation. The prospects of my research are to deepen my research on anionic clays and design new drugs to treat inflammatory bowel disease (Crohn's Disease and Ulcerative Colitis) and more particularly associated colitis and diarrhea. Key words: anionic and cationic clays, dendrimers, chitosan, cloramphenicol, salicylate. 45
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Sponsors of the conference Sodexo P
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