Browsing Artículos científicos by Title
Now showing items 10-29 of 85
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Biocomposites of Low-Density Polyethylene PlusWood Flour or Flax Straw: Biodegradation Kinetics across Three Environments
(MDPI journals, 2021-06-29)The purpose of this study was to assess the potential for biocomposite films to biodegrade in diverse climatic environments. Biocomposite films based on polyethylene and 30 wt.% of two lignocellulosic fillers (wood flour ... -
Características hidrográficas del sistema lagunar los micos-quemada en el Caribe hondureño
(Universidad Nacional (Costa Rica), 2009-12)Auspiciado por el Proyecto PREPAC (Plan Regional de Pesca y Acuicultura Continental) se realizó un levantamiento hidrográfico en 27 estaciones en el sistema lagunar Los Micos-Quemada en el litoral Caribe de Honduras. Los ... -
Características termohalinas de las aguas costeras del Caribe sur de Costa Rica
(Universidad Nacional (Costa Rica), 2015-12)En agosto y noviembre del año 2012, se realizaron dos campañas hidrográficas en la zona costera del Ca ribe sur de Costa Rica, entre el Puerto de Limón y la Laguna de Gandoca. Se utilizó un CTD (perfilador de conductividad, ... -
Characteristic atmospheric states during mid‑summer droughts over Central America and Mexico
(Springer, 2020-05-10)Annual precipitation over Central America and large areas of Mexico is typically characterised by its bimodal distribution, with a precipitation minimum in July to August that occurs between two separate maxima from May ... -
Characterization of the VARIAN®PaxScan 2020+ flat panel detector for quantitative X-ray imaging
(X-Ray Spectrometry vol.45 no.3 169-175 2016, 2016-02-19)In this work, the response of the VARIAN® PaxScan 2020+ flat panel detector was characterized in terms of spatial resolution and uniformity across the detection area along with detection efficiency for photon beams from ... -
Cladocera (Crustacea, Branchiopoda) of a temporary shallow pond from northern Colombia
(Universidad Nacional Mayor de San Marcos, 2019)Eighteen species of cladocerans are recorded from a temporary pond in northern Colombia; 12 of these records are new for La Guajira Department: Diaphanosoma brevireme Sars, 1901, D. dentatum Herbst, 1968, Sarsilotona ... -
Coastal currents in the Eastern Gulf of Tehuantepec from coastal altimetry
(Advances in Space Research, 2018-06-02)we study the seasonal and interannual variability of the coastal currents along the eastern shelf of the Gulf of Tehuantepec. We use sea level from coastal altimetry distributed by the Centre de Topographie des Oceans et ... -
Comparative Study Of Conventional And Sbci Cardboard Solar Ovens
(Elsevier, 1992)Two folding and light solar ovens designed and constructed by Solar Box Cookers International (SBCI), Sacramento, U.S.A., have been studied experimentally. Furthermore, their performance is com pared with standard two ... -
Connecting bioloy, optics and nanomechanical properties in micro-wasps
(Springer Nature, 2020-01-29)Coloration in insects provides a fruitful opportunity for interdisciplinary research involving both physics and biology, and for a better understanding of the design principles of biological structures. In this research ... -
Considerations for functional food design based on starch-protein interactions: a systematic review
(Taylor and Francis Ltd., 2021-03-26)This systematic review aims to discuss the considerations in the design of starch-based foods from protein interactions, according to their functional, technological, and nutritional effects. Thereof, a systematic search ... -
Dairy wastewater treatment by anaerobic fixed bed reactors from laboratory to pilot-scale plant: A case study in Costa Rica operating at ambient temperature
(Springer, 2013)The effect of hydraulic retention time in a range from 1.0-5.5 days was evaluated in a laboratory scale anaerobic fixed bed reactor packed with a hybrid material composed of tire rubber and zeolite. Under these conditions, ... -
Decadal Characterization of Indo-Pacific Ocean Subsurface Temperature Modes in SODA Reanalysis
(American Meteorological Society, 2015-04-29)Studies of decadal-to-multidecadal ocean subsurface temperature variability are fundamental to improving the understanding of low-frequency climate signals. The present study uses the Simple Ocean Data Assimilation (SODA) ... -
Deforestation processes in the livestock territory of La Vía Láctea, Matagalpa, Nicaragua
(Taylor and Francis Ltd., 2019-05-04)Land-use change is considered one of the main causes of environmental degradation. Thus, its analysis will allow stakeholders to make reasonable decisions for land management. The objective of the present study was ... -
La depresión tectónica de Nicaragua en Costa Rica: estructura interna, estilo estructural, edad, extensión y actividad de la cuenca de San Carlos
(Universidad de Costa Rica, 2021-05-05)Nicaragua’s tectonic depression extends from El Salvador to the plains in northern Costa Rica and is limited by strike-slip faults with a normal component. Based on a set of unpublished seismic lines, ... -
Desarrollo de materiales poliméricos para dosimetría de rayos-x con sensibilidad óptica mejorada
(Centro de Investigaciones en Laseres y Aplicaciones, 2020-10)En este trabajo se estudia el uso de un nuevo agente, capaz de formar complejos coloreados con iones metálicos, para su uso en dosimetría de Rayos-X (RX), con el objetivo de evaluar su efecto sobre la sensibilidad a la ... -
Descifrando el clima espacial: ciclos solares y ondas magnéticas de Rossby
(Revista Uniciencia, Universidad Nacional, 2019-07)El objetivo de esta investigación es explorar si existe una relación entre las ondas magnéticas de Rossby rápidas o lentas y ciertas observaciones de la actividad solar de largo y muy largo plazo (meses, años, décadas…). ... -
Description of chlorophyll <i>a</i> spatial distribution, temperature and salinity on the continental shelf and slope of the Central American Caribbean
(Universidad Nacional (Costa Rica), 2017-01)Con la coordinación regional de la Organización del Sector Pesquero y Acuícola del Istmo Centroamericano (OS-PESCA), se llevó a cabo del 3 de enero al 3 de febrero del año 2011 una campaña ... -
Design, construction and experimental study of electric cum solar oven-II
(1989)As in many developing countries,35-401 of the population of Costa Rica still use firewood for domestic cooking.Considering the fact that Costa Rica is blessed with good sunshine,good hydroelectric potential,and there ... -
Design, construction and study of a hybrid solar food processor in the climate of Costa Rica
(Elsevier, 2007)During the last 25 years, the author has designed, constructed, studied and promoted solar oven, hybrid solar/electric oven, solar oven cum drier, solar cooker cum water heater and solar still. In different parts of the ... -
Determinación de la Altura dinámica a partir de perfiles de temperatura
(Universidad Nacional (Costa Rica), 1986-01-01)La altura dinámica se calcula solo a partir de los datos de temperatura mediante el uso de una relación TS media para proporcionar valores de salinidad. El método se ha aplicado a datos de cruceros: EASTROPIC (1967) y ...
