Vol. 30 2000 Nº 1

CONTENTS
ARTICLES
L. T. Villa A MATHEMATICAL APPROACH TO ANALYZE A STEADY DIFFUSION-REACTION PROCESS 1
N. J. Scenna, C. A. Ruiz, S. J. Benz DYNAMIC SIMULATION FOR THE STARTUP OPERATION OF REACTIVE DISTILLATION COLUMNS 9
I.M.B. Trigatti, P. Arce THE TUBULAR REACTOR WITH LAMINAR FLOW REGIME: AN INTEGRAL EQUATION APPROACH-II (HEAT SOURCES AND NON-LINEAR BOUNDARY CONDITIONS) 17
F. Murrieta-Guevara, M. E. Rebolledo-Libreros, A. Romero-Martínez, A. Trejo GAS-LIQUID EQUILIBRIUM OF H2S AND CO2 IN BINARY MIXTURES OF MONOETHANOLAMINE AND DIETHANOLAMINE WITH PHYSICAL SOLVENTS 33
M. L. Parentis, N. A. Bonini, E. E. Gonzo CHARACTERIZATION OF SILICA-SUPPORTED CHROMIUM COMPLEXES 41
G. C. Spila, H. E. Bertorello NEW SUPERABSORBENT HYDROGELS: SYNTHESIS, CHARACTERIZATION AND APPLICATIONS 51
G. F. Santori, M. L. Lladó, G. J. Siri, M. L. Casella, O. A. Ferretti Cu AND CuSn SUPPORTED CATALYSTS FOR SELECTIVE HYDROGENATION OF CINNAMALDEHYDE 55
M. A. Quiroz, Y. Meas ROLE OF ADSORBED OXYGEN ON RUTHENIUM SURFACES IN THE UNDERPOTENTIAL DEPOSITION OF COPPER 61
NOTE
A. Golberg, U. Boldes, J. Colman INFLUENCE OF THE TURBULENCE LENGTH SCALES OF THE INCIDENT WIND ON THE LEAF ELONGATION RATE (LER) OF WHEAT SEEDLINGS 69
GENERAL INFORMATION 75
INSTRUCTIONS FOR AUTHORS 76

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