Rev. acad. colomb. cienc. exact. fis. nat.

Table of contents
Rev. acad. colomb. cienc. exact. fis. nat. vol.39 no.151 Bogotá Apr./June 2015

Editorial

	· Descifrando la flora de Bogotá y entendiendo la expedición de Mutis. El aporte de Santiago Díaz Piedrahita Fernández Alonso, José Luis · text in English · English ( pdf )

Mathematics

	· Existence and multiplicity of solutions to semilinear and quasilinear elliptic problems Cossio, Jorge · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

Physical sciences

	· Chaos in the Diamond-Shaped Billiard with Rounded Crown Salazar, Robert Paul; Téllez, Gabriel; Jaramillo, Diego Felipe; González, Diego Luis · abstract in English \| Spanish · text in English · English ( pdf )

Chemical sciences

	· Activated carbon production by physical methods using El Cerrejón coal and its application to waste water treatment from textile industries Rincón, José; Rincón, Sonia; Guevara, Pedro; Ballén, Daniel; Morales, Juan Camilo; Monroy, Néstor · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

Natural sciences

	· Biodiversity of Colombia: significance and regional distribution Rangel-Ch., J. Orlando · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

Earth sciences

	· On the warming and acidification of the global ocean and their possible expression in Colombian marine and coastal environment Rojas-Higuera, Paula Judith; Pabón-Caicedo, José Daniel · abstract in Spanish \| Spanish · text in Spanish · Spanish ( pdf )

Natural sciences

	· *Diversity, population density and spatial distribution of Columnea* (Gesneriaceae) in the Río Ñambí natural reserve, Nariño, Colombia** Marín-Gómez, Oscar Humberto; Amaya-Márquez, Marisol · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

	· Quantification of components affecting the vertical attenuation coefficient for downward irradiance in Ríogrande II reservoir (Colombia) Ramírez R., John Jairo; Arcila L., Mónica Cristina; Sepúlveda A., Sandra Catalina · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

Biomedical Sciences

	· Genomic characterization of human immunodeficiency virus 1 and human T-lymphotropic virus 1 simultaneous integration Domínguez, Martha C.; Alzate, Lina Andrea; García-Vallejo, Felipe · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

Earth sciences

	· The impact of deforestation on the erosion in the Magdalena River drainage basin (1980-2010) Restrepo A., Juan D. · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

	· Coda waves' tomography for surficial exploration Vargas-Jiménez, Carlos Alberto; Pedroza-Rojas, Alvaro O.; Caneva-Rincón, Alexander · abstract in English \| Spanish · text in English · English ( pdf )