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Antimicrobial activity of diverse chemotypes of Lippia graveolens against Aeromonas hydrophila isolated from tilapia
(Cold Spring Harbor Laboratory (Estados Unidos), 2023-07-25)Objetive: This study aimed to evaluate the antimicrobial efficacy of essential oil (EO) from diverse chemotypes of Lippia graveolens against oxytetracycline-resistant Aeromonas hydrophila, which primarily affects the tilapia ... -
Chirripo Hydrological Research Site: advancing stable isotope hydrology in the Central American Paramo
(AUTHOREA, 2021)Tropical mountainous ecosystems are recognized as providers of valuable ecological and hydrological services (Viviroli et al, 2007). In Central America, the P aramo, a high-elevation tropical grassland ecosystem, extends ... -
Investigating the impacts of biochar on water fluxes in 2 tropical agriculture using stable isotopes
(European Geosciences Union, 2020)Amending soils with biochar, a pyrolyzed organic material, is an emerging practice to potentially increase plant available water. However, it is not clear (1) to what extent biochar amendments increase soil water storage ... -
Life zone and habitat disturbance do not explain the coexistence in Sturnira bat species
(Springer (Alemania), 2022-06-23)One of the key questions in ecology is to understand the mechanisms that modulate the coexistence between syntopic species. Climate and habitat perturbation gradients have been proposed as moderators of species coexistence. ... -
La modelación matemática en los procesos de formación docente
(Universidad Nacional (Costa Rica), 2022-08-31)En este artículo se plantean aspectos relacionados con la modelización y modelación matemática como actividades que deben incluirse en los procesos de formación docente; lo anterior, para generar habilidades en el futuro ... -
Phytotelm to assess bacterial multi-resistance to the antibiotics in a deep tropical forest
(Research Square Company (Estados Unidos), 2022-02-22)Paradoxically, the use of antibiotics has resulted in the proliferation of resistant microorganisms in environments where they were not thought to be likely to appear. In this context, this research aimed to evaluate the ... -
Riesgo químico por exposición laboral a SO2 y H2S en el Parque Nacional Volcán Poás
(Universidad Nacional (Costa Rica), 2023-08-01)[Objetivo] Verificar el cumplimiento de los niveles de exposición a SO2 y H2S, de los guardaparques del parque, tomando como referencia la norma internacional OSHA. [Metodología] Se estudió la concentración del SO2 desde ... -
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 ... -
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 ... -
The opossum and other didelphids in the cultures of Costa Rican society and indigenous peoples: an approach to ecology and conservation
(Cold Spring Harbor Laboratory (Estados Unidos), 2024)The opossum Didelphis marsupialis, commonly referred to as the zorro pelón in Costa Rica, is a marsupial that holds significant representation in both Costa Rican and indigenous cultures, such as the Talamanca natives. ... -
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 ... -
Trophic guild and forest type explain phyllostomid bat abundance variation from human habitat disturbance
(Cold Spring Harbor Laboratory (Estados Unidos), 2020-02-16)The loss of tropical forest cover caused by land-use change is causing a reduction in functional groups, such as trophic guilds. Phyllostomid bats (family Phyllostomidae) are essential in the Neotropics since they occupy ... -
Validación de un método de cromatografía líquida (HPLC-UV/Vis) para la cuantificación de aldehídos agua de lluvia y aire
(2023-07-13)Los aldehídos son compuestos presentes en la atmósfera que se forman por la degradación fotoquímica de otros compuestos orgánicos en la tropósfera, pueden ser emitidos por fuentes naturales o antropogénicas. En el presente ...