v. 32 n. 3

artigo de atualização

• Design and construction of an experimental rig for studies of absorption air conditioners.

  Alejandro Colman, Antonio De Turris, Gustavo Díaz Valecillos, Numa Márquez Montero

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• Assessment of the structural integrity of cracked cylindrical geometries applying the EVTUBAG program.

  Luis Héctor Hernández Gómez, Guilllermo Urriolagoitia Calderón, Guillermo Urriolagoitia Sosa, Juan Manuel Sandoval Pineda, Emmanuel Alejandro Merchán Cruz, José Francisco Guardado García

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• GPS NTRIP observations: A new alternative for precise positioning in Venezuela.

  A Briceño, L Mass I Rubí, V Cioce, G Royero, L Bacaicoa, E Wildermann, M Hoyer, M Barrios

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• New U-Pb zircon ages of El Baúl Massif, Cojedes State, Venezuela.

  Patxi Viscarret, James Wright, Franco Urbani

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• Biological nitrogen removal using combinated fixed-film and suspended reactors by intermittent operation.

  Griselda Ferrara de Giner, Felipe Rodríguez Mora

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• Formation of trihalomethanes during the disinfection process in the potabilisation of water.

  Nibis Bracho, Javier Castillo, Luis Vargas, Ricardo Morales

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• Determination of atenolol in pharmaceutical dosages by Fourier transform infrared spectrometry (FTIR).

  Carlos Ayala, María Del Rosario Brunetto, Fernando Ovalles, Máximo Gallignani

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• Oxidation of natural graphite in the laboratory and comparison with the synthetic graphite oxide, by means of thermal and spectroscopic techniques.

  Daniel Pisapia, Carlos Barrios, Manuel Martínez, Katya Reategui, Williams Meléndez, Santiago Marrero, Marcos Escobar

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• Preparation and characterization of supported Ce/Tb mixed oxide for use in TWC catalysts.

  María Da Costa, Víctor Ferrer, Jorge Sánchez, Jeanette Zárraga, Dora Finol

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• Parameter estimation and validation of power transformers top oil temperature model by applying genetic algorithms.

  Rómulo Pérez, Enrique Matos Alfonso, Sergio Fernández

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