Search
Now showing items 21-30 of 2606
New sighting of seagrasses in the Eastern Tropical Pacific (Bahía Potrero, Costa Rica)
(Elsevier B.V., 2018-07-22)
Seagrass meadows provide a multitude of ecosystem services, yet they are currently threatened and declining worldwide due to anthropogenic impacts. Current knowledge of seagrass presence in the Eastern Tropical Pacific ...
Determinación de éter metil terc-butílico (MTBE) en el aire de San José, Costa Rica
(Universidad Nacional, Costa Rica, 2006)
Contribuye a la calidad del aire de la ciudad de San José y al mejoramiento de la salud pública mediante la determinación de la concentración de éter metil terc-butílico en el aire de la ciudad de San José. Se realizaron ...
Historia de la matemática una herramienta metodológica en procesos de enseñanza y aprendizaje de la geometría en el currículo de sétimo año
(Universidad Nacional, Costa Rica, 2003)
Designs and develops an alternative proposal on how to implement in the classroom the study of the contents of geometry in the seventh year with the help of historical elements of mathematics. In this research, 60 high ...
Sírfidos (Diptera: Syrphidae) depredadores de pulgones (Hemiptera: Aphididae) en lechuga Lactuca sativa L. (Asteraceae) orgánica en Costa Rica: estrategias de control biológico por conservación
(Universidad Nacional, Costa Rica, 2016)
Los sírfidos de la subfamilia Syrphinae son un grupo de insectos dípteros que visitan flores en busca de polen y néctar, cuyas larvas se alimentan principalmente de “homópteros de cuerpo blando”. Son ampliamente reconocidos ...
Las visitas educativas en robótica, la experiencia en un proyecto de extensión universitaria
(XIX Congreso Internacioal de Investigación Educativa: Investigación Comprometida para la Transformación Social, 2019-06-21)
The following work discloses the experience of educational visits of high school students to the School of Computing of the National University of Costa Rica, to receive robotics workshops as a form of university extension. ...
CRGOURMETCOFFEE.COM: using E-Commerce to mitigate the coffee paradox in Costa Rica
(International Association for Development of the Information Society, 2019)
We present the background and the design and development considerations for an electronic platform to sell Costa Rican
roasted coffee through e-commerce, referred to as crgourmetcoffee.com (https://www.crgourmetcoffee.com). ...
Isolation and partial purification of a hemolytic sphingomyelin-inhibitable fraction from the sea anemone Anthopleura nigrescens
(2014-03)
Actinoporins are highly hemolytic pore-forming proteins with a molecular mass of around 20 kDa and high affinity for sphingomyelin-containing membranes. On the crude extract of the sea anemone Anthopleura nigrescens, the ...
First measurements of methyl tert-butyl ether (MTBE) in the ambient air in San Jose, Costa Rica
(2014)
A great interest has arisen in establishing the impact of organic compounds on human health and air quality, especially those compounds emitted by automotive traffic. Knowledge of urban air pollutant concentrations is ...
First description of macropterous male and female of Cryphocricos latus (Heteroptera: Naucoridae) Usinger
(2013-03-29)
The macropterous male and female of Cryphocricos latus are herein described for the first time; both were collected in Alajuela, Costa Rica. Notes to separate this species from other macropterous species of the genus are given.
A proposal for implementing PBL in programming courses
(XL Latin American Computing Conference, CLEI 2014, 2014)
In the search of teaching strategies more consistent with the current needs of the industry and with the new university pedagogical model, an action research project was carried in the programming courses of the study ...