Browsing Facultad de Ciencias de la Tierra y el Mar by Title
Now showing items 981-1000 of 1106
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Sociodemographic and Perinatal Predictors of Early Pregnancy Per- and Polyfluoroalkyl Substance (PFAS) Concentrations
(American Chemical Society, 2015-09-02)Per- and polyfluoroalkyl substances (PFASs), used in food packaging and stain-resistant coatings, are suspected developmental toxicants that are ubiquitous and persistent in the environment. We measured plasma PFAS ... -
¿Son los hoteles para abejas una estrategia para su conservación en Costa Rica?
(Universidad Nacional, Costa Rica, 2023)Se presenta una iniciativa de instalación de "Hoteles para abejas" en diferentes localidades de Costa Rica; para la conservación de este insecto al reconocer la importancia en la polinización. Se analiza hoteles para ... -
Soundscape structure in forests surrounded by protected and productive areas in central Costa Rica
(Universidad Nacional, Costa Rica, 2023-03-09)Ecosystems are under a multitude of pressures, including land-use change, overexploitation, pollution, and climate change. Most studies, resources, and conservation efforts are allocated to protected areas, while anthropogenic ... -
Space- and ground-based measurements of sulphur dioxide emissions from Turrialba Volcano (Costa Rica)
(Springer Verlag, 2012-06-21)Remotely sensed measurements of sulphur dioxide (SO2) emitted by Turrialba Volcano (Costa Rica) are reported for the period September 2009–January 2011. Thesemeasurements were obtained using images from Advanced Spaceborne ... -
Spatial shifts in fumarolic degassing at Poás volcano: Phreatic Activity in the Ultra Acid Crater Lake versus Subaerial Degassing
(IAVCEI Commission on Hazards and Risk, 2011-09-11)Summary of the presentation Spatial shifts in fumarolic degassing at Poás volcano: Phreatic Activity in the Ultra Acid Crater Lake versus Subaerial Degassing -
Stingless Bees in applied pollination: practice and perspectives
(Apidologie, 2006-06-22)At present, numbers of both wild and managed bee colonies are declining rapidly, causing global concern for pollination services. Stingless bees play an important ecological role as pollinators of many wild plant species ... -
Stingless bees of Costa Rica
(Springer, 2012-11-19)The keeping of stingless bees (Apidae, Meliponini) or meliponiculture is carried out in a rustic and traditional way in Costa Rica. This is an activity present in several regions of the country, especially among the ... -
Stock de carbono en el bosque natural y en sitios de regeneración asistida en la Estación Biológica Osa Verde y su aporte a la mitigación del cambio climático
(Universidad Nacional, Costa Rica, 2022-08)Los bosques desempeñan un papel importante en el ciclo del carbono, al presentar degradación estos desfavorecen la capacidad para almacenar carbono en la vegetación y aumentan las emisiones. Esta investigación tuvo como ... -
Sulphur isotopic composition of volcanic gases from Poás and Turrialba volcanoes, Costa Rica
(Goldschmidt Conference, 2015)Póster presentado en Goldschmidt Conference 2015 -
SUPPRESSION OF THE ROOT-KNOT NEMATODE (MELOIDOGYNE SP.) WITH CHEMICAL-ORGANIC PRODUCTS IN ONION CROP.
(50TH ANNUAL MEETING OF NEMATOLOGIST OF TROPICAL AMERICA (ONTA 2018), 2018-08)The management of root–knot nematodes is a complex process in any farming system of susceptible plants, since most of the products not fumigants do not have current registration for vegetables. In the last five years, ... -
Tabla de volumen comercial para teca clonal en diferentes índices de sitio en la Zona Norte de Costa Rica
(Universidad Nacional, Costa Rica, 2021-01-01)Es necesario cuantificar y predecir con confiabilidad el volumen de madera para facilitar la gestión de la producción forestal. El artículo tiene como objetivo elaborar tablas de volumen comercial a partir de ... -
Taller: Guía de Técnicas agroecológicas para el manejo de las principales plagas en las plantaciones de plátano en Talamanca, Limón
(2012)Resultados de práctica profesional supervisada, Escuela de Ciencias Agrarias, como parte de los materiales del taller. -
Talleres participativos sobre riesgos en el uso de plaguicidas: Una construcción colectiva e interetaria. Informe Técnico IRET No. 40
(Universidad Nacional, Costa Rica, 2020-10)La zona del Caribe costarricense, en especial el cantón de Matina, se caracteriza por la cantidad de plantaciones agrícolas, dentro los cuales destacan los monocultivos de banano (Llaguno et al., 2014). Este desarrollo se ... -
Temporal and spatial resource use by female three-toed sloths and their young in an agricultural landscape in Costa Rica
(Revista de Biologia Tropical, 2011-12)The information on ecological behavior of wild sloths is very scarce. In this study we determined the home ranges and resources used by three adult female three-toed sloths (Bradypus variegatus) and their four young in ... -
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 ... -
Testing Explant Sources, Culture Media, and Light Conditions for the Improvement of Organogenesis in Pinus ponderosa (P. Lawson and C. Lawson)
(Universidad Nacional, Costa Rica, 2023-02-14)Pinus. ponderosa (P. Lawson and C. Lawson) is a commercial tree and one of the most important forest species in North America. Ponderosa pine suffers hardship when going through vegetative propagation and, in some cases, ... -
The 27 February 2022 Lop Nor earthquake: detectability, location, and discrimination
(Seismological Society of America (SSA), 2022)A seismic event with mb 4.8 (Mw 4.2) was detected close to the Chinese Lop Nor nuclear test site on 27 February 2022. Waveforms recorded at regional and far regional distances in central Asia indicate greater likeness with ... -
The antimicrobial activity and microbiological safety of stingless bee honeys from Costa Rica
(International Bee Research AssociationTaylor and Francis, 2014)Stingless bee honeys from Costa Rica possess etnopharmacological value mainly as a wound dressing. The microbiological study by APHA methods reported that 83 % of the honeys analysed had microbial counts that comply with ... -
The big free-tailed bat, Nyctinomops macrotis (Gray, 1839), in central America [El murciélago grande de cola libre, Nyctinomops macrotis (Gray, 1839), en Centro América]
(Mastozoologia Neotropical, 2016-12)The big free-tailed bat, Nyctinomops macrotis, is a large molossid with a discontinuous distribution in the southwestern United States and most of Mexico (northern range), and northern South America (southern range). In ...