| Table of contents Ing. Univ. vol.13 no.1 Bogotá Jan./June 2009 Scientific and Technological Research Papers | | | | · Modification of the Zeolite-Matrix Ratio in FCC Catalysts and its Impact on Yields and Quality of Middle Distillates Chanagá-Quiroz, Tania; Giraldo-Duarte, Sonia; Almanza-Pubiano, Luis
| | | | · Evaluation of the Corrosion-Erosion Rate on API 5L Grade 65 Steel in a Brine-CO2-SiO2-Mineral Oil System, by Electrochemical Techniques Muñoz-Fernández, Héctor Luis; González-Mendoza, Luis Ángel; Peña-Ballesteros, Darío Yesid
| | | | · Physicochemical and Micromorphological Evaluation of Asphalt Modified with Recycled Materials Figueroa-lnfante, Ana Sofía; Fonseca-Santanilla, Elsa Beatriz; Reyes-Lizcano, Fredy Alberto
| | | | · Modelling of a Rectifier with Unity Power Factor in Half Bridge Configuration Fajardo-Jaimes, Arturo; Ojeda-Ruiz, Fernando; Hay-Harb, Abdel Karim; Perilla-Galindo, Gabriel
| | | | · Evaluation of Environmental Impact Diminution when Recycled Material is Used for Threaded Unions Fúquene-Retamoso, Carlos Eduardo; Córdoba-Pinzón, Nazly Bibiana; hara-Borrero, Jaime Andrés; Fajardo, Sandra Méndez
| | | | · Academic Performance and Learning Styles in Engineering Students Maris Vázquez, Stella
| | | | · Searching for True Information with Spatial Data Mining Dueñas-Reyes, María Ximena
| | | | · Billing and Payment Platform in Ubiquitous Environments Solarte-Astaíza, Zeida María; Caicedo-Rendón, Óscar Mauricio; lmbuz, Javier; Amecha, Milton
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