Browsing Escuela de Ciencias Ambientales by Issue Date
Now showing items 1-20 of 90
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Anti-inflammatory and antinociceptive activities of Loasa speciosa in rats and mice
(Elsevier, 2003)In the range of doses of 250–500 mgykg (given i.p.) the aqueous extract of Loasa speciosa leaves showed an inhibitory effect on leukocyte migration, and a reduction on the pleural exudate, as well as dose-dependent ... -
Inhibition of human pathogenic fungi by ethnobotanically selected plant extracts
(Deutschsprachige Mykologische Gesellschaft, 2003-02-14)In this study, 36 extracts derived from 29 plant species selected using an ethnobotanical approach were tested for antifungal activity against a taxonomically diverse group of 13 human pathogenic fungi. We compared the ... -
A regression analysis of Q'eqchi' Maya medicinal plants from southern Belize
(Universidad Nacional, Costa Rica, 2006)Amiguet, V.T., Department of Biology, University of Ottawa, P.O. Box 450, Ottawa, Ont. K1N 6N5, Canada; Arnason, J.T., Department of Biology, University of Ottawa, P.O. Box 450, Ottawa, Ont. K1N 6N5, Canada; Maquin, P., ... -
Concentration of PM10 in the Metropolitan Area of Costa Rica, Central America: chemical composition and potential sources
(Universidad Nacional, Costa Rica, 2010)Measurements of metals and inorganic ions were carried out on PM10. Sampling was made in five sites distributed in San José, Heredia and Belén cities. Samples were collected using Thermo Andersen PM10 high volume samplers ... -
Determination of carbonyls and their sources in three sites of the metropolitan area of Costa Rica, Central America
(Springer Science+Business Media B.V, 2011-03-02)Ambient levels of carbonyl compounds and their possible sources were studied at three places in the metropolitan area of Costa Rica, including a residential, an industrial, and a com mercial downtown area with high ... -
Parasites of cetaceans stranded on the Pacific coast of Costa Rica
(Revista de parasitología veterinaria, 2011-05-12)Information regarding parasitic fauna of cetaceans from Costa Rica is provided for the first time. A total of 25 stranded dolphins and whales were examined between 2001 and 2009, including striped dolphin (Stenella ... -
New Bruce-ladder multiplex PCR assay for the biovar typing of Brucella suis and the discrimination of Brucella suis and Brucella canis
(Revista de Microbiología Veterinaria, 2011-06-28)Rapid and specific identification of Brucella suis at the biovar level is necessary because some of the biovars that infect animals are pathogenic for humans. None of the molecular typing methods described so far are ... -
Carbon accumulation in the biomass and soil of different aged secondary forests in the humid tropics of Costa Rica
(Elsevier, 2011-10-15)Efforts are needed in order to increase confidence for carbon accounts in the land use sector, especially in tropical forest ecosystems that often need to turn to default values given the lack of precise and reliable site ... -
Relations Between Bulk Precipitation, PM10 Composition and Meteorological Conditions in the Metropolitan Area of Costa Rica
(The Open Atmospheric Science Journal, 2012-02-06)Concentrations of inorganic ions (Cl -, H +, SO 4 2-, NO 3 -, NH 4 +, Na +, K +, Ca 2+, Mg 2+) and metals (V, Ni, Cu, Pb, Cr Mn, Al, Fe) in bulk precipitation and PM 10 samples collected in the metropolitan area of Costa ... -
Indigenous Ex Situ Conservation of Q'eqchi' Maya Medicinal Plant Resources at the Itzamma Garden-Indian Creek, Belize, Central America
(Springer Science, 2012-12-27)The Itzamma Garden and Medicinal Plant Project is a collaborative effort focused on identifying traditionally important plants used by the Q'eqchi' Maya of southern Belize. The Garden represents a cornerstone of the project ... -
Temporal and spatial variations in organic and elemental carbon concentrations in PM10/PM2.5 in the metropolitan area of Costa Rica, Central America
(Science Direct, 2013-01)PM2.5 and PM10 samples were collected at 4 and 14 sampling sites, respectively, located in the Metropolitan area of Costa Rica (MACR), during 2010-2011. These sites were representative of commercial, industrial and residential ... -
Clinical observations and safety profile of oral herbal products, souroubea and platanus spp: a pilot-toxicology study in dogs
(Universidad Nacional, Costa Rica, 2014-04-07)This pilot-study evaluated the toxicity and safety profi le of two herbal products Souroubea spp Botanical Blend (SSBB) and Platanus Tree Bark (PTB) after oral administration to dogs at elevated doses for 28 days. SSBB and ... -
Ethnopharmacology of Souroubea sympetala and Souroubea gilgii (Marcgraviaceae) and identification of betulinic acid as an anxiolytic principle
(Elsevier, 2015-05)The neotropical lianas Souroubea gilgii and Souroubea sympetala (Marcgraviaceae) were chosen for study as part of a phytochemical discovery strategy focusing on rare plant families in Central America. In participatory ... -
Earthquake magnitude calculation without saturation from the scaling of peak ground displacement
(Geophysical Research Letters, 2015-06-02)GPS instruments are noninertial and directly measure displacements with respect to a global reference frame, while inertial sensors are affected by systematic offsets—primarily tilting—that adversely impact integration to ... -
Antifungal Saponins from the Maya Medicinal Plant Cestrum schlechtendahlii G. Don (Solanaceae)
(Wiley, 2015-12-15)Bioassay-guided fractionation of the crude extract (80% EtOH) of the leaves of Cestrum schlechtendahlii, a plant used by Q'eqchi' Maya healers for treatment of athlete's foot, resulted in the isolation and identification ... -
Área foliar y período de enraizamiento para la propagación vegetativa de melina (Gmelina arborea Roxb.) en vivero, La Palma de Puerto Jiménez, Golfito
(Universidad Nacional (Costa Rica). Escuela de Ciencias Ambientales, 2016)Tesis con formato artículo científico que determina el área foliar adecuada y establece el período ´-optimo de enraizamiento en la propagaciónvegetaitva de clones superiores de Gmelina arborea dentro de túneles de ... -
Determinación del impacto en la calidad del agua en la parte alta de la microcuenca del río Porrosatí, por vertido de aguas residuales, para la realización de planes y acciones de manejo de recursos hídricos
(Universidad Nacional (Costa Rica). Escuela de Ciencias Ambientales, 2016)Determina el impacto en la calidad del agua en la parte alta de la microcuenca del río Porrosatí por vertido de aguas residuales para la realización de planes y acciones de manejo de recurso hídrico, que contribuyen en el ... -
Escenarios de disponibilidad de agua para consumo humano en la microcuenca del Río Porrosatí, Heredia, Costa Rica
(Universidad Nacional (Costa Rica). Escuela de Ciencias Ambientales, 2016)La investigación presenta los escenarios de disponibilidad de agua subterránea en la microcuenca del río Porrosatí. El estudio se dirige a los diferentes actores involucrados en la gestión del agua para uso y consumo humano ... -
Factores que influyen en la retención del pago de servicios ambientales en la modalidad reforestación en las zonas de Nicoya y san Carlos para el periodo 2010-214
(Universidad Nacional (Costa Rica). Escuela de Ciencias Ambientales, 2016)Analiza los principales factores que limitan la comercialización efectiva del PSA del FONAFIFO en la modalidad reforestación en las zonas de Nicoya y San Carlos para los proyectos aprobados en el período 2010-2014. Esta ... -
Evaluación del carbono almacenado en la biomasa, necromasa y carbono orgánico del suelo de tres diferentes hábitats en la Península de Osa, Costa Rica
(Universidad Nacional. (Costa Rica). Escuela de Ciencias Ambientales, 2016)Los bosques desempeñan un papel importante en el ciclo global del carbono (C), poseen la capacidad para almacenar C en la vegetación y en el suelo, incorporándolo a su estructura por largos periodos. Esta investigación ...
