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Now showing items 81-97 of 97
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Procesos de innovación en centros de investigación: casos de éxito en LANOTEC CENAT CONARE
(National Nanotechnology Laboratory, LANOTEC CENAT CONARE, Costa Rica. Polymer Laboratory, POLIUNA, National University, Costa Rica, 2020) -
Producción de un biocompuesto a base de almidón termoplástico de yuca amarga (Manihot esculenta crantz) y nanocelulosa obtenida de rastrojo de piña (Ananas comosus)
(Universidad Nacional (Costa Rica), 2021)En este estudio se produjo un biocompuesto a base de almidón termoplástico de yuca (Manihot esculenta Crantz) y nanocelulosa obtenida de rastrojo de piña (Ananas comosus), la elaboración de este bioplástico se presenta ... -
Rainfall, groundwater, and surface water isotope data from extreme tropical cyclones (2016-2019) within the Caribbean Sea and Atlantic Ocean basins
(Elsevier, 2020-06)Under a changing climate, projections estimate that over the next thirty years, extreme Tropical Cyclones (TCs) will increase in frequency, with two to three times more Category 4 and 5 hurricanes in the Atlantic basin ... -
Recycling and elimination of wastes obtained from agriculture by using nanotechnology: nanosensors
(MedCrave Group (Estados Unidos), 2017)In the friction process of two materials and in the presence of some proper lubricants, the wear process manifest itself as a material transfer from an element of the friction couple on the other, process specific to the ... -
Remote Piloting UAS in Extreme Environments with Challanging Climatic Conditions - An Overview of Modern UAS Capabilities in the Field of Volcanology, Geosciences, Atmospheric Chemistry and Interplanetary Exploration
(ADVANCED ENGINEERING DAYS (AED), 2022-09)Unmanned Aerial Systems have recently had advanced payloads configured by engineers for various atmospheric sampling experiments and have been proven a successful and innovative technology. Climatic stability in volcanic ... -
Safety Equipment For Storage And Handling Of Chemicals In University Laboratories
(2018)Persons who work in scientific laboratories must deal with different types of hazards. The main objective of laboratory safety operations is the prevention of accidents and emergencies. However, the potential for accidents ... -
Seasonal and Diel Patterns of Total Gaseous Mercury Concentration In Atmospheric Air of the Central Valley of Costa Rica
(2011)Monitoring mercury in atmospheric air near volcanoes is limited with no previous data for Costa Rica. Seasonal and daily patterns of total gaseous mercury (TGM) were observed at our main sampling location at the Universidad ... -
Síntesis de nanoprismas ramificados de oro con potenciales aplicaciones biotecnológicas
(Universidad Nacional (Costa Rica), 2020)Actualmente, las nanopartículas de oro son una interesante alternativa para ser utilizadas en diversas aplicaciones. Este trabajo se basó en la síntesis de nanopartículas anisotrópicas de oro, utilizando vesículas a base ... -
Stable isotopic characterizacion of nitrate wet deposition in the tropical urban atmosphere of Costa Rica
(Springer, 2021-07-13)Increasing energy consumption and food production worldwide results in anthropogenic emissions of reactive nitrogen into the atmosphere. To date, however, little information is available on tropical urban environments where ... -
Stable isotopic characterization of nitrate wet deposition in the tropical urban atmosphere of Costa Rica
(Research Square, 2021)Increasing energy consumption and food production worldwide results in anthropogenic emissions of reactive nitrogen into the atmosphere. To date, however, little information is available on tropical urban environments where ... -
Tracer hydrology in a hydrometric data-limited and complex tropical mountainous region: the case of the Central American Isthmus
(European Geosciences Union, 2019)Numerous socio-economic activities are dependent on the seasonal rainfall and groundwater recharge cycle across the Central American Isthmus. Demographic growth and unregulated land use changes resulted in extensive surface ... -
Tracer-aided modelling reveals quick runo generation and groundwater losses producing young stream ow ages in a tropical rainforest catchment
(2021-05-29)There is still limited understanding of how waters mix, where waters come from and for how long they reside in tropical catchments. In this study, we used a tracer-aided model (TAM) and a gamma convolution integral model ... -
Tracing water sources and fluxes in a dynamic tropical environment from observations to modeling
(Frontiers in Earth Science, 2020-11-06)Tropical regions cover approximately 36% of the Earth’s landmass. These regions are home to 40% of the world’s population, which is projected to increase to over 50% by 2030 under a remarkable climate variability scenario ... -
Using Sniffer4D and SnifferV portable gas detectors for UAS monitoring of degassing at the Turrialba Volcano Costa Rica
(Advanced UAV, 2023)Since the completion of the first Sniffer UAS payload research article titled; Using UAS with Sniffer4D Payload to Document Volcanic Gas Emissions for Volcanic Surveillance: In this study the UAS system deployed carried ... -
Using UAS with Sniffer4D payload to document volcanic gas emissions for volcanic surveillance
(Advanced UAV, 2022)A consistent volcanic monitoring program is crucial to the safety of the population and the efficiency of the nation. Costa Rica´s National Commission for Risk Prevention the CNE helps manage this responsibility. The ... -
Utilización de los desechos agroindustriales de mecate de polipropileno post consumo y raquis de banano en la obtención de materiales compuestos
(Universidad Nacional (Costa Rica), 2008-06)A nivel mundial se ha dado una concientización acerca del impacto que tiene cualquier actividad comercial en el medio ambiente. Es por esta razón que actualmente se están buscando nuevas alternativas de uso para los productos ... -
Validación de un método de detección mediante cromatografía líquida (HPLC-DAD) para la determinación de albina en productos alimenticios elaborados a partir de sábila (Aloe vera)
(Universidad Nacional, Costa Rica, 2019-07-31)La aloína es una antraquinona presente en una amplia variedad de productos alimenticios que se elaboran a base de sábila, la cual puede provocar efectos laxantes y su ingestión prolongada incrementa el riesgo de cáncer ...