Vol. 32 2002 N° 4

CONTENTS

Special Issue: SAM 2000 MEETING

ARTICLES
F. C. Gennari, G. Urretavizcaya MECHANICAL ALLOYING OF MG-GE BASED MIXTURES UNDER HYDROGEN AND ARGON ATMOSPHERES 275
M. J. L. Ginés, G. J. Benitez, T. Pérez, E. Merli, M. A. Firpo, W. Egli STUDY OF THE PICKLABILITY OF 1.8 MM HOT-ROLLED STEEL STRIP IN HYDROCHLORIC ACID 281
G. Urretavizcaya, G. García, D. Serafini, G. Meyer MG-NI ALLOYS FOR HYDROGEN STORAGE OBTAINED BY BALL MILLING 289
S. B. Farina, G. S. Duffó, J. R. Galvele LOCALIZED CORROSION OF ZIRCONIUM AND ZIRCALOY-4 IN IODINE ALCOHOLIC SOLUTIONS 295
H. A. Peretti, A. Visintin, H. L. Corso, A. Bonesi, W. E. Triaca MICROSTRUCTURE AND HYDROGEN ABSORPTION BEHAVIOR OF Zr0.9Ti0.1Mn0.66V0.46Ni1.1 UNDER ELECTROCHEMICAL AND GASEOUS MEDIA CONDITIONS 299
M. Semenza, M. Viera, G. Curutchet, E. Donati THE ROLE OF ACIDITHIOBACILLUS CALDUS IN THE BIOLEACHING OF METAL SULFIDES 303
E. A. Sacco, J. D. Culcasi, C. I. Elsner, A. R. Di Sarli EVALUATION OF THE PROTECTIVE PERFORMANCE OF SEVERAL DUPLEX SYSTEMS EXPOSED TO INDUSTRIAL ATMOSPHERE 307
P. Bruzzoni, R. M. Carranza, J. R. Collet Lacoste, E. A. Crespo STUDY OF HYDROGEN PERMEATION THROUGH PASSIVE FILMS ON IRON USING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY 313
A. J. Tolley, E. A. Sánchez PHASE TRANSFORMATIONS INDUCED BY IRRADIATION WITH IONS IN ß Cu-Zn-Al SINGLE CRYSTALS 317
REGULAR ARTICLES
C. E. López Pasquali, C. A. Wottitz, R. G. Martínez, H. A. Herrera CARBONIZATION OF "ALGARROBO NEGRO" (PROSOPIS NIGRA): A STUDY OF ITS MICROSTRUCTURE AND MAIN VOLATILE COMPONENTS 321
Z. Han, G. Chen DYNAMIC RIGHT COPRIME FACTORIZATION AND OBSERVER DESIGN FOR NONLINEAR SYSTEMS 327
E. M. Fernández Berdaguer, L. V. Pérez, J. E. Santos NUMERICAL EXPERIMENTS ON PARAMETER ESTIMATION IN ACOUSTIC MEDIA USING THE ADJOINT METHOD 337


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