971 research outputs found
Presentazione del commissario straordinario dellIstituto Oncologico Veneto: Pier Carlo Muzzio
No full textPier Carlo Muzzio è stato nominato commissario straordinario dellIstituto Oncologico Veneto il 28 dicembre 2006. Padovano, 59 anni, Muzzio ha sostituito il direttore generale dellazienda Adriano Cestrone.Digitale a color
Presentazione del commissario straordinario dellIstituto Oncologico Veneto: Pier Carlo Muzzio
No full textPier Carlo Muzzio è stato nominato commissario straordinario dellIstituto Oncologico Veneto il 28 dicembre 2006. Padovano, 59 anni, Muzzio ha sostituito il direttore generale dellazienda Adriano Cestrone.Digitale a color
The young and the restless. A discussion about age in the early career stages
No full textIn the early stages of a scientific career, age can be a determinant factor for gaining a fellowship or a research position. This paper addresses the issue of arbitrariness in such criterion, in the case of Argentina’s policy of scientific assessment. There are specific age limits for the lowest levels in the hierarchy, and even though sometimes exceptions can be made, it could lead to discrimination or unfair evaluations towards the candidates of both extremes of the distribution.Fil: Muzzio, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Multidisciplinario de Biología Celular. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Multidisciplinario de Biología Celular. Universidad Nacional de La Plata. Instituto Multidisciplinario de Biología Celular; Argentin
Capillary Drop Penetration Method to Characterize the Liquid Wetting of Powders
No full textWe present a method to characterize the wettability of powders, based on the penetration dynamics of a sessile drop deposited on a slightly compressed powder bed. First, we show that a direct comparison of the wetting properties of different liquids is possible without having to solve the three-dimensional liquid penetration problem, by considering the appropriate dimensionless variables. We show that the contact area between the sessile drop and the powder bed remains constant during the penetration process and demonstrate that, as a result, the evolution of the dimensionless penetration volume is given by a universal function of the dimensionless time, with no dimensionless parameters. Then, using a reference liquid that completely wets the powder it is possible to obtain an effective contact angle for a test liquid of interest, independent of other properties of the powder bed, such as permeability and characteristic pore size. We apply the proposed method to estimate the contact angle of water with different powder blends, by using silicone oil as the reference liquid. Finally, to highlight the potential of the proposed method to characterize pharmaceutical powders we consider a blend of Lactose, Acetaminophen and a small amount of lubricant (Magnesium Stearate). The proposed method adequately captures a large increase in hydrophobicity that results from exposing the blend to excessive mixing, a well known effect in pharmaceutical industry.Peer reviewe
A simple thermodynamic model of diluted hydrogen gas/plasma for CFD applications
No full textThis work describes a simple thermodynamic model of the hydrogen gas at low densities and for temperatures going from those involving quantum rotations of ortho- and para-hydrogen up to the fully ionized state. The closed-form energy levels of Morse rotating oscillator given [D.C. Harris, M.D. Bertolucci, Symmetry and Spectroscopy (Dover, New York, 1989)] (but not those in Morse’s original paper) are shown to provide an internal partition function of H2 that is a sufficiently accurate representation of that exploiting the state-of-the-art spectrum of roto-vibrational levels calculated by Pachucki and Komasa [K. Pachucki, J. Komasa, J. Chem. Phys. 130, 164113 (2009)]. A system of two coupled quadratic equations for molecular dissociation and atomic ionization at thermodynamical and chemical equilibrium is derived according to the statistical mechanics by assuming that the system is an ideal mixture containing molecules, neutral atoms and noninteracting protons and electrons. The system of two equations reduces to a single quartic equation for the ionization unknown, with the coefficients dependent on the temperature and the specific volume. Explicit relations for specific energy and entropy of the hydrogen ideal gas/plasma model are derived. These fully compatible equations of state provide a complete thermodynamic description of the system, uniformly valid from low temperatures up to a fully ionized state, with electrons and ions relaxed to one and the same temperature. The comparison with results of other models developed in the framework of the physical and chemical pictures shows that the proposed elementary model is adequate for computational fluid dynamics purposes, in applications with the hydrogen gas under diluted conditions and when the dissociation and ionization can be assumed at thermodynamical and chemical equilibrium
Considerazoni di tecnica e metodologia radiologiche nello studio routinario dello stomaco a doppio contrasto
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Studio numerico dello scambio termico in scambiatori di calore alettati con tubi circolari ed ellittici
No full textThe Structure of Two-Phase Flow in Ducts with Sudden Contractions and its Effect on the pressure Drops
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