Results 11 to 20 of about 35,712 (241)

Percentages of CD4+CD8+ Double-positive T Lymphocytes in the Peripheral Blood of Adults from a Blood Bank in Bogotá, Colombia

open access: yesTurkish Journal of Hematology, 2020
Objective: CD4+CD8+ double-positive T-cells (DPTs) have been classified as a separate T-cell subpopulation, with two main phenotypes: CD4high CD8low and CD4low CD8high. In recent years, the relevance of DPTs in the pathogenesis of infections, tumors, and
Miguel S. Gonzalez-Mancera   +5 more
doaj   +1 more source

Toward an imminent extinction of Colombian glaciers? [PDF]

open access: yes, 2017
This study documents the current state of glacier coverage in the Colombian Andes, the glacier shrinkage over the twentieth century and discusses indication of their disappearance in the coming decades.
Braitmeier, Michael   +9 more
core   +4 more sources

New species records in Acanthagrion, Nehalennia, and Perilestes (Odonata: Zygoptera) for Colombia

open access: yesBiota Colombiana, 2022
We record for the first time Acanthagrion jessei, Nehalennia minuta, and Perilestes solutus in Colombia, based on males and females taken at the campus Barcelona at the Universidad de Los Llanos, located in the foothills of the Colombian Eastern Andes in
Karen Lineke Alvarez Alvarez   +2 more
doaj   +1 more source

New records and confirmation of the presence of three species of primates (Mammalia, Primates) in southwestern Colombia [PDF]

open access: yesCheck List, 2020
Cebus albifrons (Humboldt, 1812); Sapajus apella (Linnaeus, 1758) and Aotus lemurinus I. Geoffroy, 1843 are widely distributed primates in Colombia. Despite this, there are gaps in the occurrence of these species in the southwestern part of the country ...
Héctor E. Ramírez-Chaves   +7 more
doaj   +3 more sources

What are the Andean Colombian anurans? Empirical regionalization proposals vs. observed patterns of compositional dissimilarity [PDF]

open access: yesPeerJ, 2023
Background Defining Andean anurans through their altitudinal limits has been a common practice in species lists, studies of responses to climate change among others, especially in the northern Andes.
Jorge Mario Herrera-Lopera   +2 more
doaj   +2 more sources

Multiregional Satellite Precipitation Products Evaluation over Complex Terrain [PDF]

open access: yes, 2016
An extensive evaluation of nine global-scale high-resolution satellite-based rainfall (SBR) products is performed using a minimum of 6 years (within the period of 2000-13) of reference rainfall data derived from rain gauge networks in nine mountainous ...
Anagnostou, E   +18 more
core   +5 more sources

New Species of Siparuna (Siparunaceae) III [PDF]

open access: yes, 2000
Three new species of Siparuna (Siparunaceae) are described, illustrated, and placed in a phylogenetic context: S. gentryana from western Ecuador and adjacent Colombia, S. lozaniana from the western Andes in Colombia, and S.
Hausner, Gerlinde, Renner, Susanne S.
core   +1 more source

New record of Tantilla alticola (Boulenger, 1903) (Serpentes, Colubridae) for the Central Cordillera in the department of Tolima, Colombia [PDF]

open access: yesCheck List, 2019
We report for the first time the presence of Tantilla alticola in the department of Tolima, Colombia. This report represents the southernmost distribution point for this species in the Central Cordillera of the Colombian Andes.
Ronald Mauricio Parra-Hernández   +2 more
doaj   +3 more sources

Pleistocene Glaciations in the Northern Tropical Andes, South America (Venezuela, Colombia and Ecuador)

open access: yesCuadernos de Investigación Geográfica, 2017
This article presents an overview of glaciation studies in the northern tropical Andes (Venezuela, Colombia and Ecuador) mostly based on glacial geochronological data.
I. Angel, O. Guzman, J. Carcaillet
doaj   +1 more source

First record of Glenurus heteropterix Gerstaecker, 1885 (Neuroptera: Myrmeleontidae) from Colombia [PDF]

open access: yesCheck List, 2014
The genus Glenurus Hagen, 1866 is recorded for the first time in Colombia, with G. heteropterix Gerstaecker, 1885 collected in the departments of Santander and Tolima, extending their known distribution range to the Colombian Andes.
Adrian Ardila-Camacho   +2 more
doaj   +3 more sources

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