Ciencias básicas
Colecciones en esta comunidad
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Biología [193]
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Física [17]
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Geología [19]
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Matemática [14]
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Meteorología [134]
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Química [44]
Envíos recientes
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DNA-assisted identification of Caulerpa (Caulerpaceae, Chlorophyta) reduces species richness estimates for the Eastern Tropical Pacific
(2016)Taxonomy and species richness estimates for the genus Caulerpa have proven challenging due to the difficulty of assessing morphological species limits. In the present study we evaluate the taxonomy of the genus and assess ... -
Mercury levels in muscle tissue of four common elasmobranch species from the Pacific coast of Costa Rica, Central America
(2016-01)Mercury (Hg) is a non-essential and toxic element that is ubiquitous in the marine environment and biomagnifies through food webs. Given the high trophic position of many elasmobranch species, it is important to quantify ... -
La investigación en la Reserva Biológica Alberto ML. Brenes (Área de Conservación Arenal - Tilarán)
(2000)El documento se refiere a las actividades de investigación en la Reserva Biológica Alberto Manuel Brenes (RBAMB), ubicada en San Ramón de Alajuela y administrada por la Universidad de Costa Rica, por medio de la Sede de ... -
NC10 bacteria in marine oxygen minimum zones
(2016-08-10)Bacteria of the NC10 phylum link anaerobic methane oxidation to nitrite denitrification through a unique O2-producing intra-aerobic methanotrophy pathway. A niche for NC10 in the pelagic ocean has not been confirmed. We ... -
Density, size, and biomass of Diadema mexicanum (Echinoidea) in Eastern Tropical Pacific coral reefs
(2016)Diadema is among the most abundant, widely dispersed, and ecologically important genera of sea urchin in tropical shallow waters. D. mexicanum is distributed from the Gulf of California to northern Peru, including the ... -
Effect of high pH on growth of Synechocystis sp. PCC 6803 cultures and their contamination by golden algae (Poterioochromonas sp.)
(2016)Culturing cyanobacteria in a highly alkaline environment is a possible strategy for controlling contamination by other organisms. Synechocystis PCC 6803 cells were grown in continuous cultures to assess their growth ... -
First record of the sea anemone Anthopleura mariscali outside the Galápagos Archipelago
(2017-03)The sea anemone Anthopleura mariscali Daly and Fautin 2004 is described as an endemic species of the Galápagos Archipelago. Its authors suggested that it may have been overlooked elsewhere because of its small size ... -
Trophic ecology of sea urchins in coral-rocky reef systems, Ecuador
(2016-01-14)Sea urchins are important grazers and influence reef development in the Eastern Tropical Pacific (ETP). Diadema mexicanum and Eucidaris thouarsii are the most important sea urchins on the Ecuadorian coastal reefs. This ... -
Elasmobranch bycatch associated with the shrimp trawl fishery off the Pacific coast of Costa Rica, Central America
(2015)Demersal sharks and rays are common yet vulnerable components of the bycatch in tropical bottom-trawl fisheries. Little is known about the elasmobranch assemblages associated with most of these fisheries, particularly ... -
Hallazgos fenotípicos por imágenes con Tomografía Dental Volumétrica (TDV) en amelogénesis imperfecta
(2016)Amelogénesis imperfecta (AI) se describe como un conjunto de defectos mendelianos en la biomineralización del esmalte dental, los cuales son severos en la mayoría de los casos al presentar anormalidades tales como un grosor ... -
Genome Sequencing of Sulfolobus sp. A20 from Costa Rica and Comparative Analyses of the Putative Pathways of Carbon, Nitrogen, and Sulfur Metabolism in Various Sulfolobus Strains
(2016-11-30)The genome of Sulfolobus sp. A20 isolated from a hot spring in Costa Rica was sequenced. This circular genome of the strain is 2,688,317 bp in size and 34.8% in G+C content, and contains 2591 open reading frames (ORFs). ... -
Integration and Fixation Preferences of Human and Mouse Endogenous Retroviruses Uncovered with Functional Data Analysis
(2016-06-16)Endogenous retroviruses (ERVs), the remnants of retroviral infections in the germ line, occupy ~8% and ~10% of the human and mouse genomes, respectively, and affect their structure, evolution, and function. Yet we still ... -
Reverse Transcription Errors and RNA-DNA Differences at Short Tandem Repeats
(2016-07-12)Transcript variation has important implications for organismal function in health and disease. Most transcriptome studies focus on assessing variation in gene expression levels and isoform representation. Variation at the ... -
A time- and cost-effective strategy to sequence mammalian Y Chromosomes: an application to the de novo assembly of gorilla Y
(2016-02)The mammalian Y Chromosome sequence, critical for studying male fertility and dispersal, is enriched in repeats and palindromes, and thus, is the most difficult component of the genome to assemble. Previously, expensive ... -
Salivary gland morphology, tissue tropism and the progression of tospovirus infection in Frankliniella occidentalis
(2016)Tomato spotted wilt virus (TSWV) is transmitted by thrips in a propagative manner; however, progression of virus infection in the insect is not fully understood. The goal of this work was to study the morphology and infection ... -
Phylogenetic reassessment of Specklinia and its allied genera in the pleurothallidinae (Orchidaceae)
(2016)The phylogenetic relationships within Specklinia (Pleurothallidinae; Orchidaceae) and related genera are re-evaluated using Bayesian analyses of nrITS and chloroplast matK sequence data of a wide sampling of species. ... -
Sobre el genoma humano, la medicina personalizada y el sistema de seguridad social
(2016)La promesa del proyecto del genoma humano (PGH) fue que iba a transformar radicalmente la práctica médica. Cambiaría el paradigma de “diagnóstico y tratamiento” por el de “predicción de riesgo y prevención”. Hace más de ... -
Neuropsychological Test Performance in Cognitively Normal Spanish-speaking Nonagenarians with Little Education
(2016-06)To find associations of age, sex, and education with neuropsychological test performance in cognitively normal Spanish-speaking Costa Rican nonagenarians with little education; to provide norms; and to compare their ... -
A Multivariate Regression Model Between the October Rainfall Anomalies in Central America and the Tropical Pacific and Atlantic Ocean
(1999-11)Principal Component Analysis was used to identity common anomaly patterns amongst 72 rainfall gauge stations in Central America during October, in order to identify stations to from October Rainfall Indices. October was ...
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