Browsing by Title
Now showing items 6097-6116 of 13429
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Gramsci y la estrategia revolucionaria
(Universidad Nacional, Costa Rica, 1990) -
La gran causa nuestra. Unionismo y modernismo centroamericano
(Universidad Nacional, Costa Rica, 2020)Este artículo es una indagación sobre la relación entre la literatura modernista y la búsqueda de la unidad centroamericana a finales del siglo XIX. Rubén Darío fue la figura clave que guio la generación; su escritura ... -
La gran causa nuestra. Unionismo y modernismo centroamericano
(Universidad Nacional, Costa Rica, 2020-12)Este artículo es una indagación sobre la relación entre la literatura modernista y la búsqueda de la unidad centroamericana a finales del siglo XIX. Rubén Darío fue la figura clave que guio la generación; su escritura ... -
Granjas avícolas, Cantón Poás
(Escuela de Ciencias Geográficas, 2008-01)Ubicación de granjas avícolas del cantón de Poás, para la Propuesta de Plan Regulador. -
Graphene flakes obtained by local electro-exfoliation of graphite with a STM tip
(Physical Chemistry Chemical Physics vol.11 no.19 8061-8068 2017, 2017-02-24)Graphite surfaces can be manipulated by several methods to create graphene structures of different shapes and sizes. Scanning tunneling microscopy (STM) can be used to create these structures either through mechanical ... -
Gravimetría aérea para la determinación del geoide local
(Universidad Nacional (Costa Rica), 2004)En el presente artículo se describe la estimación del geoide local usando la componente vertical del vector de perturbación de gravedad obtenida a partir de un vuelo gravimétrico. Aun cuando las componentes horizontales ... -
Green Solvents in Carbohydrate Chemistry: From Raw Materials to Fine Chemicals
(American Chemical Society, 2015)In recent decades, there has been an increasing effort to reduce the use of fossil fuels and oil derivatives, to decrease environmental pollution, and to counteract global warming. The use of biomass as raw material is ... -
Green Synthesis of Gold and Silver Nanoparticles from Plant Extracts and Their Possible Applications as Antimicrobial Agents in the Agricultural Area
(MDPI AG, 2020-09-07)Currently, metal nanoparticles have varied uses for different medical, pharmaceutical, and agricultural applications. Nanobiotechnology, combined with green chemistry, has great potential for the development of novel and ... -
Grit and academic performance of costa rican university students
(Universidad Nacional (Costa Rica). Escuela de Literatura y Ciencias del Lenguaje, 2019-08-10)This qualitative, exploratory study inquired how students’ grit, the ability to persevere and to have passion for long-term goals, helps them achieve their main objectives in the field of EFL. The participants were 62 ... -
El grito de Calibán. Del cinematógrafo al proyecto TeleSur: la construcción de lo latinoamericano en la comunicación audiovisual regional
(Universidad Nacional, Costa Rica, 2011)Este ensayo analiza la importancia de la televisora TeleSur (fundada en el año 2005), en el contexto histórico del desarrollo de los medios de comunicación audiovisuales en América Latina y los debates acerca de la influencia ... -
El grito, lo inolvidable
(2010-03-24) -
Groundwater age and recharge processes in a tropical volcanic aquifer
(Universidad Nacional (Costa Rica), 2019)La recarga de agua subterránea en acuíferos volcánicos altamente fracturados sigue siendo poco conocida en los trópicos húmedos. El rápido crecimiento demográfico y los cambios no regulados en el uso de la tierra dieron ... -
Groundwater and surface water connectivity within the recharge area of Guarani aquifer system during El Niño 2014–2016
(Wiley & Sons, 2018)Recharge areas of the Guarani Aquifer System (GAS) are particularly sensitive and vulnerable to climate variability; therefore, the understanding of infiltration mechanisms for aquifer recharge and surface run‐off generation ... -
Groundwater flow modeling using iMOD for Barva and Colima aquifers in the Central Valley of Costa Rica: validation of a conceptual model using tracer data
(Universidad Nacional de Salta, 2018)A stationary numerical model of groundwater flow was developed using iMOD to better understand the recharge processes within Barva and Colima aquifers (BCS), located in the northwestern region of the Central Valley of Costa ... -
Groundwater recharge mechanisms inferred from isoscapes in a complex tropical mountainous region
(AGU Publications, 2016-05-23)Stable isotope variations and groundwater recharge mechanisms remain poorly understood across the tropics, particularly in Central America. Here stable isotopes (δ18O and δ2H) in groundwater, surface water, and rainfall ... -
Growth and alkaline digestive proteases activity of Parachromis dovii larvae fed live prey and formulated diets with different protein sources
(Universidad Técnica de Manabí (Ecuador), 2022-07-16)Parachromis dovii is a carnivorous cichlid fish from Central America, which easily accepts formulated feeds since exogenous feeding starts; however, its larval growth is lower than that obtained using live food. For this ... -
Growth and feed utilization of Dow cichlid (Cichlasoma dovii) larvae fed Artemia nauplii
(Universidad de Costa Rica (Costa Rica), 1995-12-01)Growth and feed utilization of Dow cichlid larvae (Cichlasoma dovii) fed with Artemia nauplii during the [lISt 12 days are assessed and compared with the growth of the larvae of the jaguar cichlid (Cichlasoma managuense). Growth ... -
Growth and fillet yield in recirculation systems of Lobotes pacificus (Perciformes: Lobotidae), a species with aquaculture potential
(Universidad Nacional (Costa Rica), 2019-07)The genus Lobotes extends across tropical and subtropical areas of oceans such as the Atlantic and the Pacific; it is extracted in artisanal fisheries, and its aquaculture production technology is still under investigation. ... -
Growth and hydrogen production by three Chlamydomonas strains cultivated in a commercial fertilizer
(Elsevier Ltd, 2019-04-19)In the present investigation, we report the growth and hydrogen production of two wild type Chlamydomonas reinhardtii strains isolated from a tropical oxidation pond in Costa Rica. The performance of these two new isolates ... -
Growth and photosynthetic performance of five tree seedlings species in response to natural light regimes from the Central Pacific of Costa Rica
(Universidad de Costa Rica, 2013)Growth and photosynthetic performance of five seedlings of tree species in response to natural light regimes in the Central Pacific of Costa Rica. Environmental heterogeneity mostly dominated by differing light regimes ...