Browsing Facultad de Ciencias Exactas y Naturales by Title
Now showing items 1221-1240 of 2543
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Evaluación poblacional y pautas de ordenamiento pesquero del complejo Opisthonema (Pisces: Clupedae), Golfo de Nicoya, Costa Rica
(Universidad Nacional (Costa Rica), 2010)En Costa Rica, el complejo Opisthonema es uno de los componentes más importantes de la captura pesquera y sustenta una de las flotas semiindustriales del Golfo de Nicoya. Con base en esta importancia económica, el objetivo ... -
Evaluación preliminar de aguas y suelos como insumo para el diagnóstico socioambiental en el Humedal Palustrino Corral de Piedra, Guanacaste
(Universidad Nacional (Costa Rica), 2012-08)El Humedal Palusfrino Corral de Piedra se ubica en Distrito de San Antonio del Cantón de Nicoya, Provincia de Guanacaste y es una extensión del sitio Ramsar Palo Verde. En su zona de amortiguamiento se encuentra el poblado ... -
Evaluación química y biológica del efecto de extractos de plantas contra Plasmodium berghei
(Universidad de Costa Rica, 1996)Extracts from thirteen species of plants were evaluated by "in vivo" antimalarial test against Plasmodium berghei effects. Significant activities were observed in the ethyl acetate and aqueous extracts, elaborated of ... -
Evaluación y ajuste del Programa de Monitoreo Voluntario "Adopte una Quebrada" (Puerto Viejo de Sarapiquí, Heredia)
(Universidad Nacional (Costa Rica), 1999)El presente estudio evaluó el conocimiento acerca de conceptos relacionadas con ecología acuática y la actitud proambiental de dos grupos de estudiantes del Colegio Técnico de Puerto Viejo de Sarapiquí, Heredia. Uno de ... -
Evaluación y optimización del funcionamiento de un sistema de humedales artificiales horizontales de flujo subsuperficial como alternativa de tratamiento de aguas residuales ordinarias ubicados en playa Dominical
(Universidad Nacional (Costa Rica), 2013-07)Las aguas residuales generadas en las diferentes actividades comerciales e industriales son las responsables hoy en día de la contaminación de los cuerpos de agua, eso trae consigo impactos negativos en el ambiente y en ... -
Evaluación y recomendaciones para el manejo de aguas residuales de una empresa procesadora de derivados lácteos
(Universidad Nacional (Costa Rica), 2008-09)El presente proyecto se desarrolló en una pequeña industria ubicada en la provincia de Alajuela perteneciente a la rama alimentaria, como reseña histórica ésta inicia sus labores en el año 1998 y en la actualidad abarca ... -
Evaluación zooquímica preliminar del coral blanco Iciligorgia Schrammi colectado en Jacó, Herradura de la Costa Rica, como un agente anti-inflamatorio
(Universidad Nacional (Costa Rica), 2007)El estudio zooquímico preliminar en este trabajo demostr6 que el coral blando lciligorgia schrammi, colectado en la zona rocosa de playa de Jaco. Oceano Pacifico de Costa Rica, localizado entre las coordenadas ogo 37,181' ... -
Evaluación, medición o verificación de los aprendizajes en el aula: Un estudio de caso en el Colegio Humanístico Costarricense de Heredia
(Universidad Nacional (Costa Rica), 2015-05-01)El análisis de las diversas evaluaciones que se gestan en el aula es fundamental para poder reinterpretar el quehacer educativo y el logro de los aprendizajes, partiendo de la necesidad que tiene la academia de ofrecer ... -
Evaluating SODA for Indo-Pacific Ocean decadal climate variability studies
(Journal of Geophysical Research: Oceans, 2014-10-31)Estimates of changes in upper ocean temperature, heat content, and sea level are dependent on the coverage of subsurface observations in space and time. Historically, these data are sparse, which has limited our understanding ... -
Evaluating the macro and micro geographic mechanisms that modulate the coexistence between sympatric Sturnira bat species
(Springer (Alemania), 2023-09-27)One of the key questions in ecology is to understand the mechanisms that modulate the coexistence between sympatric species. Climate and habitat perturbation gradients have been proposed as moderators of species coexistence. ... -
Evaluating watershed health in Costa Rican national parks and protected areas
(Springer Science and Business Media Deutschland GmbH, 2020-08-11)Although the biodiversity of Costa Rican national parks, forests, and wetlands has been extensively surveyed, there has not been a watershed assessment that refects their baseline water quality. Undoubtedly, the infux of ... -
Evaluation by a teacher of the suitability of her mathematics class
(Universidad de Sao Paulo, 2019)Evaluation of teaching practice is a necessary task to improve the teaching and learning processes. The purpose of this study is to analyze the assessments made by a Mathematics in-service teacher when she observed a ... -
Evaluation of Escherichia coli concentrations in Crassostrea gigas and seawater in two oyster growing areas in the Gulf of Nicoya, Costa Rica
(Universidad Nacional (Costa Rica), 2014-12)Costa Rica does not have references on the health quality of Crassostrea gigas growing areas, which can pose a po tential public health risk. This study evaluated the temporal trends of Escherichia coli concentrations in ... -
Evaluation of the collaboration process from an individual and collaborative perspective
(ACM International Conference Proceeding Series, 2014-09)Many proposals to evaluate the collaborative process focus on "measure" the group's participation in the fulfillment of the activity and do not consider the individual aspect. This paper reports the results of an exploratory ... -
Evaluation of the manipulation that is given to the fishery product in terms of quality and safety at the time of its capture by the artisanal fisherman of the Gulf of Nicoya, Costa Rica
(Universidad Nacional, Costa Rica, 2017-12-18)The research evaluated the handling and storage type that is given to the fish product in terms of quality and safety at the time of its capture by the fisherman. The methodological tool for obtaining the primary information ... -
Evaluation of volume change in rectum and bladder during application of image-guided radiotherapy for prostate carcinoma
(AIP Conference Proceedings, 2016-07-07)All prostate cancer patients from Centro Médico Radioterapia Siglo XXI receive Volumetric Modulated Arc Therapy (VMAT). This therapy uses image-guided radiotherapy (IGRT) with the Cone Beam Computed Tomography (CBCT). This ... -
Event report: “Green adaptation strategies for water security in the Central American Dry Corridor”. Nicoya, Costa Rica.
(Universidad Tecnológica de Dresde, Alemania, 2019-11)This document contains the report of the workshop entitled “Green adaptation strategies for water security in the Central American dry corridor” organized in Nicoya, Costa Rica, on 26 March 2019. The workshop represented ... -
Evidence for vocal diversity during physical interference at the perch in sympatric Carollia species (Chiroptera: Phyllostomidae): a key to social organization and species coexistence?
(Oxford Academic (Reino Unido), 2022-02)Vocal diversity might reflect the social organization and sustain the coexistence of cryptic species in sympatry. To test the extent to which vocal behaviour separates sympatric, cryptic species of a bat radiation, we ... -
Evidencia fotográfica de especies desconocidas de onicóforos (Onychophora: Peripatidae) de Costa Rica
(Universidad Estatal a Distancia (Costa Rica), 2016-12)Onychophorans are hard to find and identify to species under field conditions. Currently, there are seven species described from Costa Rica, and an appropriate taxonomic revision is necessary. However, technology allows ... -
Evolution of the Main Crater, Irazú Volcano National Park, Costa Rica – Consumer Drones in professional research
(Advanced UAV, 2022)There has been significant cracking and erosion on the south crater wall of the Main Crater below the area where tourists gather to view the main feature of the park; The Main Crater. By deploying the EVO Lite+ drone system ...