Results 41 to 50 of about 386,439 (207)

Relación de los haplogrupos del ANDmit y el polimorfismo fok-I del receptor de vitamina d, en un grupo de pacientes con esclerosis múltiple

open access: yesIatreia, 2010
La Esclerosis Múltiple (EM) es considerada de baja prevalencia en Colombia (1.48 a 4.98), es una enfermedad desmielinizante del SNC. Se ha sugerido que está influenciada por un componente étnico, relacionado con el origen caucásico de las poblaciones en ...
Wilmer A. Cárdenas   +6 more
doaj  

Immunogenicity of a 23-valent pneumococcal polysaccharide vaccine in elderly residents of a long-term care facility

open access: yesBrazilian Journal of Infectious Diseases
S. pneumoniae is a significant cause of community-acquired pneumonia in the elderly, and accounts for the majority of the pneumonia deaths among the elderly.
M. Teresa Valenzuela B.   +7 more
doaj   +1 more source

Influència de la sal en el desenvolupament tectònic de la Cordillera Oriental dels Andes de Colòmbia [PDF]

open access: yes, 2016
La presència de capes de sal en conques sedimentàries no sempre és fàcil d'observar a causa de processos geològics posteriors com ara la compressió. Un estudi recent ha trobat evidències d'antigues estructures salines a la regió de Guaitiquía, al front d'
Teixell Cácharo, Antonio
core   +1 more source

Limb sounders tracking topographic gravity wave activity from the stratosphere to the ionosphere around midlatitude Andes [PDF]

open access: yes, 2015
Several studies have shown that the surroundings of the highest Andes mountains at midlatitudes in the Southern Hemisphere exhibit gravity waves (GWs) generated by diverse sources which may traverse the troposphere and then penetrate the upper layers if ...
Alexander   +41 more
core   +1 more source

Synthesis and Characterization of Six Novel Samarium (III) Complexes with L-aspartic Acid, L-glutamic Acid, Glycine and O-phenanthroline, Bipiridile as Ligands

open access: yesRevista Politécnica, 2015
Resumen: Se sintetizaron dos series diferentes de complejos de samario (III): Sm(o-Phen) (Ln)3 y Sm (bipy) (Ln)3 (n = 1-3; L1 = ácido l-aspártico, L2 = ácido l-glutámico, L3 = glicina) mediante métodos clásicos.
E. Cardozo   +6 more
doaj  

Evaluation of the phenol degradation capacity of microalgae-bacteria consortia from the bay of Cartagena, Colombia

open access: yesTecnoLógicas, 2019
The development of new technologies for environmental reparation has allowed the application of inexpensive alternatives such as bioremediation, which has a high potential to treat ecosystems polluted with hydrocarbons. Microalgae-bacteria consortia have
Daniela Mora-Salguero   +4 more
doaj   +1 more source

The Chanka: Archaeological Research in Andahuaylas (Apurimac), Peru [PDF]

open access: yes, 2010
In AD 1438 a battle took place outside the city of Cuzco that changed the course of South American history. The Chanka, a powerful ethnic group from the Andahuaylas region, had begun an aggressive program of expansion.
Aráoz Silva, Miriam   +2 more
core  

Ski Box: Los Andes, Chile [PDF]

open access: yesARQ (Santiago), 2007
Resumen es: Construir en un paraje cordillerano a 3000 m de altura, en un lugar con caracteristicas disimiles y realidades totalmente opuestas: la de invierno y la d...
Del Río, Nicolás, Núñez, Max
openaire   +3 more sources

A high-altitude peatland record of environmental changes in the NW Argentine Andes (24 ° S) over the last 2100 years [PDF]

open access: yes, 2016
High-altitude cushion peatlands are versatile archives for high-resolution palaeoenvironmental studies, due to their high accumulation rates, range of proxies, and sensitivity to climatic and/or human-induced changes. Especially within the Central Andes,
Hense, Jonathan   +7 more
core   +3 more sources

Localización de puntos de monitoreo de calidad de agua en sistemas de distribución

open access: yesTecnología y ciencias del agua, 2014
Durante años, particularmente en los países en desarrollo, las empresas prestadoras del servicio (EPS) de agua potable han utilizado procedimientos empíricos para localizar, en sus redes de distribución, los puntos en los cuales deben hacerse muestreos ...
Juan G. Saldarriaga   +5 more
doaj  

Home - About - Disclaimer - Privacy