INSTITUTO SABATO
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Examinando INSTITUTO SABATO por Autor "Abriata, J. P."
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Ítem Acceso Abierto Comment on "A classical test of the entropy production function. Compatibility with kinetic laws and local equilibrium".(American Chemical Society, 1980) Smoglie, C. I.; Abriata, J. P.In this comment we present an argument by which we disagree with the above-reproduced conclusions of Chasteen and Spitzer. To this end it is sufficient to examine the particular case of heat transfer in a system identical with that described by them. Such a system consists of an infinite flat plate of pure solid of thickness L. The faces are maintained at constant and equal temperatures, T2, by contact with isothermal surroundings.Ítem Acceso Abierto Low-Temperature Specific Heats of the β′ and ζ 0 Phases in Equiatomic AgZn(1970) Abriata, J. P.; Bressan, O. J.; Luengo, C. A.; Tholouze, D.Heat-capacity measurements between 1.3 and 4.2°K have been made on equiatomic AgZn in both the β ′ and ζ 0 phases. Significant differences were found in the Debye temperature and the electronic specific-heat coefficient, the latter data being discussed in terms of Fermi-surface-Brillouin-zone interactions. Furthermore, it is concluded that β ′ is the stable phase at 0°K, and that in this particular alloy, vibrational properties are of major importance in controlling phase stability near 0°K.Ítem Acceso Abierto On the existence of a two-phase field in the uranium oxygen system. within the composition range 2.65 O/U < 2.67 below 1273 K.(North Holland Publishing Co., 1983) Caneiro, A.; Abriata, J. P.; Garcés, J.The purpose of this work was to further investigate the existence, or not, of a two-phase field between UO 2.65 and UO 2.67 below 1273 K. It was carried out making use of equipment recently developed in our laboratory useful for equilibrium thermogravimetric measurements of PO2, as a function of composition and temperature. A convenient fixed temperature was chosen for our measurements, namely 998 K.