Vol. 29 No. 2

Review paper

• The effect of strain hardening on the behavior of the AISI 304 stainless steels alloys under dry friction

  Rigoberto Reinoza, Alexo Guillén

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• Behavior of metals (Pb, Zn, Fe, Al and Ni) during coal mine drainages treatment in constructed wetlands

  Julio César Marín, Adriana López, Elisabeth Behling, Gilberto Colina, Nola Fernández

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• Stabilization of a brushed DC motor with the port controlled Hamiltonian approach

  Atilio Morillo Piña, E. Miguel Rios, Vivian Acosta

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• Concentration of K, Na, Ca, Mg, Fe, proteins and fatty in the lined catfish Pseudoplatystoma fasciatum of the middle Orinoco in Venezuela

  A. González, A. Márquez, W. Senior, G. Martínez

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• The effect of the choice of turbulence model on the simulation of fluid flow on a centrifugal separator

  Alejandro Colman, José Rincón, Carlos Araujo, Gilberto Materano, Miguel Reyes

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• Formulation of asphalt emulsions with lignin derivatives and its behavior with mixtures of stony materials

  Claudia Pierini, Carlos Bracho, Gioconda Gonzáles

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• Regression models for the prediction of high impact polystyrene properties using operational variables

  Diana Soto, Jorge Alaña, Haydee Oliva

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• Vulnerability to the contamination of underground waters in the Coquivacoa Parish of the Maracaibo Municipality-Zulia State

  Wilmer Márquez, Nola Femández, Williams Cerón

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• Thermal comfort in naturally ventilated buildings of Maracaibo, Venezuela

  Gaudy Claret Bravo Morales, Eduardo Manuel González Cruz

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• Kinetics of ion-exchange in raw and commercial pasteurized milk

  Karina Martínez, Jorge Alaña, José Ferrer, José Faría, Eduardo Ramones, Cézar García

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