11 research outputs found

    Defect-based reconstruction

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    Sentinel node biopsy stands the test of time and the proof of time

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    International audienceObservational studies conducted in the 1970s, including that by Bernard Guerrier, cited by Bocca et al. [1], and subsequent studies published in the literature [2], have shown that neck dissection must be systematically performed in operable stage T1-T2N0 oral and oropharyngeal squamous cell carcinoma (OC) in order to diagnose and treat occult micrometastases [3]

    Die ZusammenfĂĽhrung von spezialgesetzlichem und allgemeinem Vertragsrecht am Beispiel des Verbrauchervertragsrechts

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    The effect of metal-cation vacancies on vanadium antimonate surface properties. A theoretical study

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    In this work, we studied the distribution of V and Sb vacancies in the rutile-type vanadium antimonate phase and the influence of these cationic defects on the VSbO4(110) surface properties. We performed density functional theory (DFT) calculations to compute the energy stability of bulk supercells with different geometrical arrangements of the metal-cation-deficient sites. Then, we built a model of the nonstoichiometric VSbO4(110) surface, which exhibited an extra O layer and isolated V cations—V atoms surrounded by Sb ions—that could act as Lewis acid sites. The density of states (DOS) plot of this surface showed contributions of O(2p) states, coming from surface O atoms nearest-neighbor of a V vacancy, and V(3d) states near the Fermi level. We also studied the influence of cation-vacancies in the formation of Brønsted acid sites.Fil: Seitz, Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - Bahía Blanca. Instituto de Física del Sur; Argentina; Universidad Nacional del Sur. Departamento de Física; Argentina;Fil: Juan, Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - Bahía Blanca. Instituto de Física del Sur; Argentina; Universidad Nacional del Sur. Departamento de Física; Argentina;Fil: Brizuela, Graciela Petra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - Bahía Blanca. Instituto de Física del Sur; Argentina; Universidad Nacional del Sur. Departamento de Física; Argentina;Fil: Irigoyen, Beatriz del Luján. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina
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