Biología: Recent submissions
Now showing items 1-20 of 1292
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A New Masdevallia (Pleurothallidinae: Orchidaceae) from the White-Sand Forests of the Central Amazon, Brazil
(2022-03-21)Masdevallia britoi, a new species in Masdevallia sect. Minutae, is described and illustrated from the central Amazon in Brazil. It is similar to M. wendlaniana but differs by shorter sepals that are internally white, shorter ... -
A new species and a new record of Malaxis (Malaxidinae) from Costa Rica
(2022-04-25)We describe and illustrate a new species and a new record of Malaxis from the lower montane and montane forests of Costa Rica. Taxonomic descriptions, illustrations, distribution maps, and conservation assessments are ... -
Micromorfología de los foliolos de pejibaye Bactris gasipaes (Arecaceae) var. Diamantes-10
(2016-07-01)Bactris gasipaes se cultiva ampliamente para el aprovechamiento del palmito y el consumo de los frutos En este trabajo se realizó una descripción de las características micro morfológicas de los foliolos de plantas ... -
Bosques de coral negro del Área de Conservación Guanacaste, Costa Rica: especies y distribución
(2021-09-06)Introduction: Little is known about the antipatharians in Costa Rica, only three species are known from the Pacific and the occurrence of coral forests was previously reported only for Isla del Coco. Black ... -
Distribución del pez sierra de dientes grandes (Pristis pristis) en Costa Rica: reconstrucción histórica y actual mediante métodos tradicionales y ADN ambiental
(2021)The Critically Endangered largetooth sawfish Pristis pristis is one of the most threatened elasmobranch species and is currently thought to be locally extinct in at least 27 countries. Although largetooth sawfish information ... -
Web building behavior in a wall spider (Oecobiidae) suggests a close relationship with orb-weavers
(2022)Behavior is often phylogenetically informative and detailed descriptions of behavior have been used to support taxonomic relationships in several groups, such as birds, lizards, and arthropods. Web building behavior has ... -
The predictive power of pollination syndromes: Passerine pollination in heterantherous Meriania macrophylla (Benth.) Triana (Melastomataceae)
(2021)The cloud forest species Meriania macrophylla (Benth.) Triana has pseudocampanu- late flowers with bulbous stamen appendages, typical for the passerine pollination syndrome found in the Melastomataceae tribe Merianieae. ... -
Avistamientos de Orcinus orca (Linnaeus, 1758) (Cetartiodactyla: Odontoceti: Delphinidae) en el Pacífico costarricense (1990-2020)
(2021-09)Las orcas son cetáceos poco estudiados en el trópico, y sus desplazamientos por aguas costarricenses han sido escasamente abordados. Son animales de gran importancia ecológica debido a su rol como depredadores top, y ... -
Algoritmos de aprendizaje automático en la identificación de miARNS potencialmente asociados a discapacidades intelectuales no sindrómicas
(2022-05-20)Las Discapacidades intelectuales (IDs) son un grupo de trastornos del neuro-desarrollo con una alta heterogeneidad fenotípica y genotípica. La asociación de elementos genéticos, como genes, micro-ARNs o ARNs largos no ... -
Typification of Costa Rican Orchidaceae described by Rudolf Schlechter. Species variorum collectorum
(2022-04)The typification of 53 orchid species described by Rudolf Schlechter based on specimens gathered in Costa Rica by Paul (Pablo) Biolley, Juan José Cooper Sandoval, Auguste R. Endrés, Carl Hoffmann, Emel Jiménez Segura, Otón ... -
Evaluación del hábitat, comportamiento y riesgo de las tropas de monos congo (Alouatta palliata) en búsqueda de la sostenibilidad con fines turísticos, en Playa Hermosa, Guanacaste
(2022-04-06)El hábitat de una especie debe mantenerse en condiciones esenciales para su sobrevivencia. Estas condiciones corresponden a elementos como los son la cobertura forestal, alimento, agua, condiciones climáticas, pendientes ... -
Pocillopora spp. growth analysis on restoration structures in an Eastern Tropical Pacific upwelling area
(2022)Coral reefs in Culebra Bay (North Pacific of Costa Rica) are threatened by multiple anthropogenic disturbances including global warming, overfishing, eutrophication, and invasive species outbreaks. It is possible to assist ... -
Genetic structure in two avian species with different tolerance to urbanization: Case of white-eared ground-sparrow and house wren across an urban gradient
(2022)El flujo génico en aves puede verse afectado por la urbanización dependiendo de la historia natural y adaptabilidad de la especie al cambio de hábitat. Se pueden esperar resultados contrastantes cuando se comparan ... -
Spectroelectrochemical Experiment for Studying Water Oxidation with a Nickel Oxide Catalyst
(2020)Electrochemical and spectroelectrochemical techniques are very important for characterizing energy materials. In the search for new sources of renewable energy, water splitting for hydrogen production and CO2 reduction is ... -
Electric-field control of single-molecule tautomerization
(2020)The electric field is an important parameter to vary in a single-molecule experiment, because it can directly affect the charge distribution around the molecule. Yet, performing such an experiment with a well-defined ... -
Hot carrier extraction from multilayer graphene
(2016)Hot carriers in semiconductor or metal nanostructures are relevant, for instance, to enhance the activity of oxide-supported metal catalysts or to achieve efficient photodetection using ultrathin semiconductor layers. ... -
High Performance Graphene–Oxide–Metal Diode through Bias‐Induced Barrier Height Modulation
(2016)Graphene–oxide–metal diodes are presented whose performance is preserved even for thin oxide layers, as required for high frequency applications. The diodes, which rely upon bias-induced modulation of graphene's work ... -
Chemical modification of graphene via hyperthermal molecular reaction
(2014)Chemical functionalization of graphene is achieved by hyperthermal reaction with azopyridine molecular ions. The one-step, room temperature process takes place in high vacuum (10–7 mbar) using an electrospray ion beam ... -
Thin-layer black phosphorus/GaAs heterojunction pn diodes
(2015)Owing to its high carrier mobility and thickness-tunable direct band gap, black phosphorus emerges as a promising component of optoelectronic devices. Here, we evaluate the device characteristics of p-n heterojunction ... -
Electroactive copper (II) bimetallic self-assembled multilayers on Si (100)
(2012)Silicon (100) surfaces were modified by reacting 4-aminopyridine and Si–Cl bond. These surfaces were further used for tethering copper bimetallic complexes and growing monolayers and multilayers by changing the axial ...