• Caracterización molecular de bacterias simbióticas provenientes de especies forestales leguminosas y evaluación de la respuesta de inoculación 

  Zúñiga Orozco, Andrés (2023-05-26)

  La diversidad de bacterias fijadoras de nitrógeno asociada con especies forestales tropicales ha sido relativamente poco estudiada. En este estudio se aislaron bacterias simbiontes en nódulos de ocho especies forestales ...

• Agresividad y competencia por refugios en el murciélago Kerivoula hardwickii 

  Castillo Salazar, Christian Angelo (2022)

  En la competencia por recursos, generalmente se ha pensado que los animales con mayor tamaño y masa corporal tienen más probabilidades de ganar batallas. Sin embargo, recientemente se ha descubierto que las diferencias de ...

• Aristolochia hondurensis (Aristolochiaceae), a new species from Honduras 

  Jiménez Vargas, José Esteban; Oyuela Andino, Olvin; Bonilla, Josué H.; Blanco Coto, Mario Alberto (2023-02-23)

  Aristolochia hondurensis, a new species of Aristolochia series Hexandrae subseries Hexandrae, endemic to Honduras, is described and illustrated. It is a species morphologically similar to Aristolochia anguicida, from which ...

• Converging science and literature cultures: learning physics via The Little Prince novella 

  Godínez Sandí, Alejandro; Fallas Padilla, Diego Alonso; España Tapia, Sebastián; Zúñiga Villegas, Andrea; Castro Mora, Milena; Herrera Sancho, Óscar Andrey (2018)

  Primary level education follows a pedagogy model where literature and science have been historically separated. Natural children processes are disrupted, as learning based on play curiosity is completely transformed by a ...

• Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America 

  Rivera Fernández, Erick; Amador Astúa, Jorge Alberto; Sáenz Soto, Ferrán (2022-12)

  The sensitivity of regional climate model simulations to domain size and position is becoming increasingly important for generating reliable climate scenarios. In this study, the Central America CORDEX domain (CCA) at 50 ...

• Probability of induced extreme precipitation events in Central America due to tropical cyclone positions in the surrounding oceans 

  Hidalgo León, Hugo G.; Alfaro Martínez, Eric J.; Valverde Hernández, Kenneth T.; Bazo, Juan (2022-12-29)

  The preparedness of national and local authorities for extreme hydrometeorological events could alleviate the impacts in many socioeconomical sectors. A statistical tool for the prediction or assessment of extreme ...

• Assessing dengue fever risk in Costa Rica by using climate variables and machine learning techniques 

  Barboza Chinchilla, Luis Alberto; Chou Chen, Shu Wei; Vásquez Brenes, Paola Andrea; García Puerta, Yury Elena; Calvo Alpízar, Juan Gabriel; Hidalgo León, Hugo G.; Sánchez Peña, Fabio Ariel (2023-02-13)

  Dengue fever is a vector-borne disease affecting millions yearly, mostly in tropical and subtropical countries. Driven mainly by social and environmental factors, dengue incidence and geographical expansion have increased ...

• Demystifying Orchid Pollination 

  Karremans Lok, Adam Philip (2023)

  Demystifying Orchid Pollination explores the fascinating natural history of orchids and the extraordinary means by which they reproduce. Author Adam P. Karremans reveals their hidden secrets, from the cruel obsession of ...

• Beyond the various contrivances by which orchids are pollinated: global patterns in orchid pollination biology 

  Ackerman, James D.; Phillips, Ryan; Tremblay, Raymond L.; Karremans Lok, Adam Philip; Reiter, Noushka; Peter, Craig I.; Bogarín Chaves, Diego Gerardo; Pérez Escobar, Oscar Alejandro; Liu, Hong (2023)

  Orchidaceae show remarkable diversity in pollination strategies, but how these strategies vary globally is not entirely clear. To identify regions and taxa that are data-rich and lend themselves to rigorous analyses or are ...

• Two new cauliflorous species of Aristolochia subseries Anthocaulicae (Aristolochiaceae) from southern Central America 

  Jiménez Vargas, José Esteban; Blanco Coto, Mario Alberto (2022)

  Two new cauliflorous species of Aristolochia subseries Anthocaulicae from southern Central America are described and illustrated. Aristolochia guanacastensis from northwestern Costa Rica resembles A. ruiziana, from which ...

• Evaluación de la Dosis Efectiva por la Incorporación de Flúor 18 en el Personal Ocupacionalmente Expuesto del Laboratorio Ciclotrón-PET/CT 

  Bonilla Araya, Alexander Alberto (2023)

  La incorporación de radionúclidos es uno de los riesgos asociados a las prácticas de producción y manipulación de radiofármacos, por lo que, esta investigación tiene como objetivo general desarrollar una metodología para ...

• Evaluación de prácticas agrícolas sobre la comunidad de aves en un paisaje cafetalero con distintos tipos de manejo 

  Molina Mora, Ingrid (2023)

  Entre los varios métodos de producción agrícola extensiva existentes, se producen distintos impactos ambientales y sociales. Uno de los más grandes constituye la pérdida de hábitat para la vida silvestre. La agricultura ...

• Assessment of the Spatial Variation in the Occurrence and Intensity of Major Hurricanes in the Western Hemisphere 

  Martínez Romero, Luis Carlos; Romero, David; Alfaro Martínez, Eric J. (2023-01-04)

  Major hurricanes are a critical hazard for North and Central America. The present study investigated the trends of occurrence, affectation, and intensity of major hurricanes in the North Atlantic and Northeast Pacific ...

• Sweet as Vanilla hartii: Evidence for a nectar-rewarding pollination mechanism in Vanilla (Orchidaceae) flowers 

  Watteyn, Charlotte; Scaccabarozzi, Daniela; Muys, Bart; Reubens, Bert; Ackerman, James D.; Fernández Otárola, Mauricio; Guizar Amador, Maria Fernanda; Karremans Lok, Adam Philip (2023-05-01)

  Little is known about the pollination mechanisms of species belonging to the genus Vanilla (Orchidaceae). Both autonomous self-pollination and animal-mediated pollination mechanisms seem to exist amongst the Vanilla species, ...

• Reconstruction of manifolds in noncommutative geometry 

  Rennie, Adam; Várilly Boyle, Joseph C. (2008-01-31)

  We show that the algebra A of a commutative unital spectral triple (A,H,D) satisfying several additional conditions, slightly stronger than those proposed by Connes, is the algebra of smooth functions on a compact spin manifold.

• Photochemische Umlagerung von 1-Acyloxy-1-alkoxy-λ5-phosphorin-Derivaten 

  Constenla Umaña, Manuel Arturo; Dimroth, Karl (1976)

  Während bei 1-Akoxy-1-benzoyloxy-2,4,6-triphenyl-λ5-phosphorin-Derivaten 1a-e photochemisch in Ausbeuten von 46 - 96% dieselben 1-Alkoxy-6c-benzoyl-1r-oxo-2,4,6-triphenyl-1λ5-phospha-2,4-cyclohexadiene 2a-e isoliert werden, ...

• Derivados del 3,4-Dihidro-isoazol 

  Constenla Umaña, Manuel Arturo; Aguilar González, Jorge Eduardo (1978)

  Synthesis and structure elucidation of the products (3a-e) of condensation of phenanthrenequinone with various ketones in presence of ammonia.

• Ricciocarpos natans (Marchantiophyta, Ricciaceae), new to Costa Rica, with a survey of its presence in Latin America 

  Acuña Castillo, Rafael; Jiménez Vargas, José Esteban; Blanco Coto, Mario Alberto; Bezerra Silva, Luiz Eduardo (2023-03-22)

  Background and Aims: Ricciocarpos natans is one of the few species of truly aquatic hepatics. It has a subcosmopolitan distribution and appears to be more common in temperate areas. The species has been considered to be ...

• Biology, Behavior, and Larval Morphology of Salbia lotanalis (Lepidoptera: Crambidae), a Potential Biological Control Agent of Miconia calvescens (Myrtales: Melastomataceae) From Costa Rica 

  Castillo Castillo, Alexander; Johnson, M.Tracy; Badenes Pérez, Francisco R. (2014-11-01)

  The leaf roller Salbia lotanalis Druce (Lepidoptera: Crambidae), a potential biological control agent of Miconia calvescens de Candolle (Melastomataceae), was studied in Costa Rica. Larvae were collected from a Þeld site ...

• Residuos, degradación y comportamiento de la ametrina en un vertisol de Guanacaste. Costa Rica 

  León Dobles, Lorena; Constenla Umaña, Manuel Arturo; Bornemisza Steiner, Elemer (1978)

  Residues of the herbicide Ametrine (2-ethylamine-4-isopropylamine-6-methylthio-s-atrazine) were determined by UV-spectrometrical analysis in a soil (vertisol) of Guanacaste, Costa Rica, which has been treated with this ...

View more