Vol. 30 No. 1 (2018)

Original Article

• Synthesis of titanium tetraphenoxides and their catalytic evaluation in ethylene dimerization

  Carlos Mendoza, Sandra L. Amaya, July Carolina Vivas, Adriana Echavarría

  7-14

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• Georeferencing of the seismological and accelerographic stations of the seismo-logical observatory of the University of Quindio implementing the system of positioning GNSS

  Viviana Ruiz Zorrilla, Marisol Gómez Cano

  15-22

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