Artículos científicos: Recent submissions

Now showing items 21-40 of 223

    • Hydroclimatic and ecohydrological resistance/resilience conditions across tropical biomes of Costa Rica 

      Esquivel-Hernández, Germain; Sanchez-Murillo, Ricardo; Birkel, Christian; Good, Stephen P.; Boll, Jan (John Wiley & Sons (Estados Unidos), 2017)
      Water resources management in the tropics is challenged by climate variability and unregulated land use change and their impacts on the complex interactions between vegetation, soil, and atmosphere. This study focuses ...

    • Data Descriptor: Daily observations of stable isotope ratios of rainfall in the tropics 

      Munksgaard, Niels; Kurita, Naoyuki; Sánchez-Murillo, Ricardo; Ahmed, Nasir; Araguas, Luis; Balachew, Dagnachew L.; Bird, Michael; Chakraborty, Supriyo; Kien Chinh, Nguyen; Cobb, Kim M.; Ellis, Shelby A.; Esquivel-Hernández, Germain; Ganyaglo, Samuel Y.; Gao, Jing; Gastmans, Didier; Kaseke, Kudzai Farai; Kebede, Seifu; Morales, Marcelo R.; Müller, Moritz; Chee Poh, Seng; dos Santos, Vinícius; Shaoneng, He; Wang, Lixin; Yacobaccio, Hugo; Zwart, Costijn (Springer Nature (Alemania), 2019)
      We present precipitation isotope data (δ2H and δ18O values) from 19 stations across the tropics collected from 2012 to 2017 under the Coordinated Research Project F31004 sponsored by the International Atomic Energy Agency. ...

    • Isotopic composition and major ion concentrations of national and international bottled waters in Costa Rica 

      Sanchez-Murillo, Ricardo; Esquivel-Hernández, Germain; Birkel, Christian; Ortega, Lucía (Elsevier (Países Bajos), 2021)
      Global bottled water consumption has largely increased (14.35 billion gallons in 2020) [1], [2], [3], [4], [5] during the last decade since consumers are demanding healthier and safer forms of rehydration. Bottled water ...

    • Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica 

      Sanchez-Murillo, Ricardo; Gastezzi-Arias, Paola; Sánchez-Gutiérrez, Rolando; Esquivel-Hernández, Germain; Pérez-Salazar, Roy; Poca, María (Frontiers Media (Suiza), 2022-01)
      Tropical peatlands are distributed mainly in coastal lowlands; however high elevation regions exhibit a large prevalence of small and fragmented peatlands that are mostly understudied. Artificial drainage of peatlands to ...

    • Hydrometeorological Factors Controlling the Stable Isotopic Composition of Precipitation in the Highlands of South Ecuador 

      Zhiña, Dario; Mosquera, Giovanny M.; Esquivel-Hernández, Germain; Córdova, Mario; Sanchez-Murillo, Ricardo; Orellana-Alvear, Johanna; Crespo, Patricio (American Meteorological Society (Estados Unidos), 2022-07)
      Knowledge about precipitation generation remains limited in the tropical Andes due to the lack of water stable isotope (WSI) data. Therefore, we investigated the key factors controlling the isotopic composition of precipitation ...

    • Water stable isotopes reveal the hydrological response of Costa Rican glacial lakes to climate variability 

      Esquivel-Hernández, Germain; Quesada-Román, Adolfo; Sanchez-Murillo, Ricardo; Vargas-Salazar, Enzo; Quesada-Román, Adolfo (Elsevier (Países Bajos), 2022)
      Los lagos generalmente se consideran una fuente de información clave para comprender el paleoclima. Aquí usamos estable. Isótopos de agua (δ2H y δ18O) en un lago glacial tropical de gran altitud para informar sobre la ...

    • Dry season plant water sourcing in contrasting tropical ecosystems of Costa Rica 

      Sánchez-Murillo, Ricardo; Todini-Zicavo, Diego; Poca, María; Birkel, Christian; Esquivel-Hernández, Germain; Chavarría, María Marta; Zuecco, Giulia; Penna, Daniele (John Wiley & Sons (Estados Unidos), 2023)
      Tracer-aided studies to understand plant water uptake sources and dynamics in tropical ecosystems are limited. Here, we report the analysis of dry season source water uptake patterns of five unique ecosystems of Costa ...

    • Exploring the acid neutralizing effect in rainwater collected at a tropical urban area: Central Valley, Costa Rica 

      Esquivel-Hernández, Germain; Sanchez-Murillo, Ricardo; Villalobos Córdoba, Diego; Monteiro, Lucilena Rebelo; Villalobos Forbes, Mario; Sánchez-Gutiérrez, Rolando; Cotrim, Marycel; Matiatos, Ioannis (Elsevier (Países Bajos), 2023)
      We report on the chemical and the carbon isotopic composition of dissolved inorganic carbon (DIC) of rainwater collected between May and October 2020 in the Central Valley, Costa Rica. Precipitation samples were ...

    • Frontiers in páramo water resources research: A multidisciplinary assessment 

      Mosquera, Giovanny M.; Hofstede, Robert; Bremer, Leah L.; Asbjornsen, Heidi; Carabajo-Hidalgo, Aldemar; Célleri, Rolando; Crespo, Patricio; Esquivel-Hernández, Germain; Feyen, Jan; Manosalvas, Rossana; Marín, Franklin; Mena-Vásconez, Patricio; Montenegro-Díaz, Paola Fernanda; Ochoa-Sánchez, Ana; Pesántez, Juan; Riveros-Iregui, Diego; Suárez, Esteban (Elsevier (Países Bajos), 2023)
      Interdisciplinary knowledge is necessary to achieve sustainable management of natural resources. However, research is still often developed in an exclusively disciplinary manner, hampering the capacity to holistically ...

    • Nitrate Legacy in a Tropical and Complex Fractured Volcanic Aquifer System 

      Sánchez-Gutiérrez, Rolando; Sanchez-Murillo, Ricardo; Esquivel-Hernández, Germain; Birkel, Christian; Boll, J.; Rojas-Jiménez, L. D.; Castro-Chacón, L. (John Wiley & Sons (Estados Unidos), 2023)
      Nitrate legacy is affecting groundwater sources across the tropics. This study describes isotopic and ionic spatial trends across a tropical, fractured, volcanic multi-aquifer system in central Costa Rica in relation to ...

    • ENSO sentinels in the Americas' humid tropics: We need combined hydrometric and isotopic monitoring for improved El Niño and La Niña impact prediction 

      Sánchez-Murillo, Ricardo; Birkel, Christian; Boll, J.; Esquivel-Hernández, Germain; Rojas-Jiménez, L. D.; Castro-Chacón, L.; Durán-Quesada, Ana María ; Voarintsoa, Ny Riavo; Dee, Sylvia; Winguth, Arne (John Wiley & Sons (Estados Unidos), 2023)
      This Scientific Briefing presents results from a nearly 10-year hydrometric and isotope monitoring network across north-central Costa Rica, a region known as a headwater-dependent system. This monitoring system has ...

    • New Botanical Anxiolytics for Use in Companion Animals and Humans 

      Liu, Rui; Ahmed, Fida; Cayer, Christian; Mullally, Martha; Carballo Arce, Ana Francis; Otarola Rojas, Marco; Garcia, Mario; Baker, John; Masic, Aleksandar; Sanchez, Pablo E.; Poveda, Luis; Merali, Zul; Durst, Tony; Arnason, John T. (Springer (Alemania), 2017-11)
      As part of our ongoing research into botanical therapies for anxiety disorders, the neotropical vine Souroubea sympetala was chosen for study as a phytochemical discovery strategy focusing on rare Central American plant ...

    • Saneamiento de aguas residuales mediante humedales artificiales en el Museo de Cultura Popular de la Universidad Nacional 

      Alfaro, Carolina; Pérez, Roy; Solano, Mayela (Universidad Nacional (Costa Rica), 2013-06)
      El cumplimiento de los Objetivos de Desarrollo del Milenio en términos de acceso sostenible al saneamiento requiere incrementar el desarrollo de programas de investigación que promuevan opciones tecnológicas simples y de ...

    • Polypropylene Composites Reinforced with Lignocellulose Nanocrystals of Corncob: Thermal and Mechanical Properties 

      Santos-Ventura, Edgar Mauricio; Escalante-Álvarez, Marcos Alfredo; González-Nuñez, Rubén; ESQUIVEL, MARIANELLY; Sulbaran Rangel, Belkis (Universidad Nacional (Costa Rica), 2024-03-29)
      Composites based on recycled polypropylene (PP) reinforced with cellulose nanocrystals whit lignin corncob were prepared. The effect of the ratio composites prepared via a compression molding process on the mechanical and ...

    • Evaluación de la huella de agua y la gestión del recurso hídrico en las industrias 

      Rios Badilla, Eduard; Boj, Paulo; Alfaro-Chinchilla, Carolina (Universidad Estatal a Distancia (UNED) (Costa Rica), 2022-06)
      La forma en que se gestiona el recurso hídrico en las industrias puede ser de gran influencia en sus beneficios y utilidades, así como en el acceso a fondos verdes. Con el incremento de la población, la expansión agrícola ...

    • Síntesis, propiedades y aplicaciones de puntos cuánticos a base de carbono 

      Rivera-Álvarez, Andrea; Quesada, Arianna; Jose-Roberto, Vega-Baudrit; Paniagua, Sergio A. (Revistes Catalanes amb Accés Obert, 2022)
      Los puntos cuánticos a base de carbono muestran propiedades ópticas y electrónicas de interés tecno-lógico debido a su confinamiento cuántico y el efecto de los grupos funcionales en sus bordes. Pueden ...

    • First Measurements of Biogenic Hydrocarbons in Air in a Tropical Cloudy Forest, Monteverde, Costa Rica 

      Esquivel-Hernández, Germain; Madrigal-Carballo, Sergio; Alfaro Solís, Rosa; Sibaja, José; Valdés-González, Juan (David Publishing Compan, 2011)
      Measurements of biogenic hydrocarbons in ambient air were carried out during 2008 in a cloud y tropical forest in Monteverde, Costa Rica. Isoprene, α-pinene, β-pinene, 3-carene, d-limonene and γ-terpinene were sampled by ...

    • Perfil nacional de uso de mercurio en Costa Rica a la luz de la entrada en vigencia del Convenio de Minamata 

      Fernández Villalobos, Adriana; Herrera-Murillo, Jorge; Sibaja, José (Universidad Nacional (Costa Rica), 2017)
      El mercurio es un metal cuya inadecuada gestión puede poner en riesgo la salud y el medio ambiente, y debido a que en el país no existe una herramienta que le permita establecer los controles para su gestión, se elaboró ...

    • Inventario de emisiones de mercurio en Costa Rica en el 2014 utilizando la herramienta del PNUMA en un nivel N2 

      Murillo Hernández, Julio César; Herrera-Murillo, Jorge; Sibaja, José (Universidad Nacional (Costa Rica), 2018)
      El Convenio de Minamata se firmó en octubre del 2013 buscando proteger la salud humana y el medio ambiente de las liberaciones y emisiones antropogénicas tanto de mercurio elemental como de los compuestos que contienen ...

    • Aplicación de un método para evaluar el impacto ambiental de proyectos de construcción de edificaciones universitarias 

      mora barrantes, jose carlos; Molina-León, Oscar Mario; Sibaja, José (2016)
      La evaluación de impacto ambiental consiste en la identificación y valoración de los impactos potenciales de proyectos respecto a los componentes físicos, químicos y biológicos, culturales, económicos y sociales, con el ...