Biología
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Phylogenetic comparative methods improve the selection of characters for generic delimitations in a hyperdiverse Neotropical orchid clade
(2019)Taxonomic delimitations are challenging because of the convergent and variable nature of phenotypic traits. This is evident in species-rich lineages, where the ancestral and derived states and their gains and losses are ... -
Pollination of Habenaria tridactylites (Orchidaceae: Orchidinae) on the Canary Islands
(2019)We investigated the pollination of Habenaria tridactylites, an endemic orchid of the Canary Islands. The entirely green, widely open flowers have a long spur containing nectar. We carried out fieldwork, a molecular clock ... -
A New Species of Gorgonian Octocoral from the Mesophotic Zone off the Central Coast of California, Eastern Pacific with a Key to Related Regional Taxa (Anthozoa, Octocorallia, Alcyonacea)
(2019-05-15)Recent offshore benthic surveys utilizing Remotely Operated Vehicles in the National Marine Sanctuaries along the California coastline under the auspices of the National Oceanic and Atmospheric Administration and the Ocean ... -
A new species of the genus Psammogorgia (Cnidaria: Anthozoa: Octocorallia) from the Hannibal Bank in Pacific Panama
(2019)The octocoral faunas occurring at mesophotic depths (from 40 to 150 m) have been relatively unexplored. Recent expeditions to Hannibal Bank, a guyot seamount off Pacific Panama, have yielded new octocoral species and new ... -
Habituation and spatial memory in the context of emotional regulation: Behavioral and genetic mechanisms underlying context information-processing and de-arousal grooming
(2017)Habituation is the ability to passively reduce a response after repeated or prolonged exposures to a particular stimulus. From a cognitive perspective, habituation is a basic, information-gating process that contributes ... -
New records of Swiftia (Cnidaria, Anthozoa, Octocorallia) from off the Pacific Costa Rican margin, including a new species from methane seeps
(2019)Exploration of the deep sea off the Pacific margin of Costa Rica has resulted in the discovery of a number of new species and reports for the region. Here, we report on the occurrence of the octocoral genus Swiftia, and ... -
Age, experience, and neurobehavioral domain: dissociable effects of environmental enrichment and social isolation on brain and behavior in adult and aged rats
(2019)In rats, environmental enrichment (EE) is a form of physical-social stimulation used for modeling the impact of optimal developmental conditions on animal’s phenotype. When implemented during early life, EE improves animal’s ... -
Age-dependent differences on neurochemistry and behavior in rats raised with low and high levels of maternal care
(2019)In laboratory rats, naturally-occurring variations in maternal care have been used to study the neurobehavioral consequences of maternal nursing and to model the early-life adversity associated with many psychiatric ... -
Análisis de Sostenibilidad de la Cadena de Valor de una Empresa Social Agroforestal en el Trópico Húmedo de América: Diseño de un Informe de Impacto Caso de estudio: Chicza, México
(2019)Desde la aparición del ser humano se han perdido la mitad de los bosques en la tierra. El trayecto actual de la humanidad está arrasando con los ecosistemas y vida silvestre en lo que se considera la sexta extinción masiva ... -
Estudio etnobotánico en Cedral y Corazón de Jesús, área de amortiguamiento de la Reserva Biológica Alberto Manuel Brenes, Costa Rica
(2018)Este estudio etnobotánico ofrece datos referentes al uso, manejo y valoración de la diversidad vegetal, en el área de amortiguamiento de la Reserva Biológica Alberto Manuel Brenes (ReBAMB). Se indagó en la percepción, ... -
The Neutrophil-Lymphocyte Ratio is an Independent Prognostic Factor for Overall Survival in Hispanic Patients with Gastric Adenocarcinoma
(2018-07-13)Introduction High values of neutrophil-lymphocyte ratio (NLR) and platelet-lymphocyte ratio (PLR) are related with poor prognosis in patients with gastric cancer. However, this association has been rarely assessed in ... -
Evaluation of pharmacological therapies used in Costa Rica in patients with metastatic gastric cancer: a retrospective study
(2019-01-18)Background: Gastric cancer is one of the leading causes of cancer death worldwide. Surgery is regarded as the best curative treatment option for gastric cancer; however, a high proportion of cases are diagnosed at advanced ... -
Evaluation of the expression of the oncogene C-ERBB-2/HER2 in gastric cancer cases from Costa Rica
(2019-09-19)Justification: The prevalence of gastric cancer (GC) with increased expression of the HER2 oncoprotein shows important variations worldwide. Incidence and mortality rates of GC in Costa Rica are among the highest in Latin ... -
Gastric cancer in the era of immune checkpoint blockade
(2019-09-24)Gastric cancer (GC) is one of the most important malignancies worldwide because of its high incidence and mortality. The very low survival rates are mainly related to late diagnosis and limited treatment options. GC is the ... -
Propuestas de sostenibilidad para la comunidad de Calle Zamora, desde la gestión institucional del Colegio Técnico Profesional de Calle Zamora, San Ramón, Alajuela, 2018-2019
(2019-10)La presente investigación se elaboró con la intención de crear propuestas de sostenibilidad para la comunidad de Calle Zamora que sean gestionadas por el Colegio Técnico Profesional de la localidad. Para esto se realizó ... -
Aposematismo en la rana Phyllobates vittatus (anura: Dendrobatidae): integrando defensas, señales y riesgo de depredación
(2019-10-01)El aposematismo es una estrategia defensiva en la cual animales que poseen una defensa lo advierten a los depredadores a través de una señal conspicua. Por ejemplo, algunos animales tóxicos o con poca palatabilidad le ... -
Hidrocarburos cuticulares: su potencial como estímulo para el reconocimiento de parentela en dos arañas subsociales anelosimus (Araneae: Theridiidae) y patrones de fijación de hilos de seda en la araña subsocial Anelosimus baeza (Araneae: Theridiidae)
(2019-09-27)El reconocimiento de parentela en grupos sociales de artrópodos puede ocurrir por diferentes tipos de estímulos, como por ejemplo los compuestos excretados de la cutícula. Un rasgo posiblemente ancestral de las arañas ... -
Unraveling the whole story: An Ultraestructural study of the common bean "amachamiento" disease caused by Aphelencoides besseyi
(2019-07-21)Se identificó Aphelencoides besseyi como responsable del amachamiento del frijol -
Estudio genético de la resistencia a las estrobilurinas en aislamientos de Pseudocercospora fijiensis de plantaciones de banano en Costa Rica
(2019)La Sigatoka negra, causada por el hongo Pseudocercospora fijiensis Morelet, es considerada la enfermedad foliar más limitante para la producción de banano y plátano a nivel mundial y de mayor impacto económico para la ... -
Caracterización molecular y bioquímica de mutantes M3 de arroz (Oryza sativa indica L. VAR. CR5272) en condiciones de estrés salino
(2019)El arroz es un cultivo de gran importancia a nivel mundial, ya que es la base de la alimentación de 2/3 partes de su población. En Costa Rica este grano representa el 20 % de la ingesta calórica diaria, por lo que es ...
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