| Table of contents Tecnura vol.25 no.68 Bogotá Apr./June 2021 Editorial | | | | · Editorial García Ubaque, Cesar Augusto
| | | Research | | | | · Regional Intellectual Wealth and Sustainable Development in Colombia Zárate, Carlos Hildebrando; García-Ubaque, Juan Carlos; García-Benitez, Paula Fernanda
| | | | · Electrocoagulation as an Alternative for the Removal of Chromium (VI) in Solution Villabona-Ortíz, Ángel; Tejada-Tovar, Candelaria; Contreras-Amaya, Rafael
| | | | · Environmental impact of sewage discharge into illegal urban agglomerates in Villavicencio, Colombia Moyano Salcedo, Álvaro Javier; Cuadros Segura, Fabián Dario; Pabón Laverde, Adrián Mateo; Trujillo Arias, Jassbleydi Valentina
| | | | · Partial discharges detection through ultraviolet radiation in medium and high voltage networks in Colombia Sepúlveda Durán, Edwin Fernando; Martínez Santa, Fernando
| | | | · Corporate Celebrations in Colombia: Spaces of Diversity, Inclusion, and Productivity Balanta Castilla, Nevis; Paz Montes, Luisa Stella; Navarro Mejía, David
| | | Case Study | | | | · Recognition and evaluation of possibles geosites associated to dolinas in Malargüe department Mendoza Province, Argentina Cortez Taillant, Valeria Sofía; Arroqui Langer, Agustín
| | | | · Methodology for the Selection of Trenchless Sewer Rehabilitation Technologies in Bogotá, Colombia Tovar Romero, Edward Leonardo; Valero Fandiño, Jorge Alberto; Cepeda Ariza, Leonardo
| | | | · Knowledge and Actions of Young People Living in Rural Territories and Facing Environmental Problems Fascinetto Bárcena, Gabrielle; Méndez Cadena, María Esther; Ocampo Fletes, Ignacio; López Sánchez, Higinio
| | | Review | | | | · Literature review and modelling of the desaturation of a sandy soil by means of the air injection method Sepúlveda Cano, Sebastián; Vega-Posada, Carlos Alberto; García Aristizábal, Edwin Fabián
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