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Now showing items 1876-1895 of 13517
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Childhood leukaemia in Costa Rica, 1981-96
(Blackwell Science, 2002)Childhood leukaemia incidence in Costa Rica during 1981-96, among the highest in the world, was analysed by histology, gender, birth year, time period of diagnosis, age at diagnosis and region. Numbers of cases were extracted ... -
Children and a second language: learning to speak.
(2012-11-09) -
Los Chiles, Costa Rica
(IDESPO-UNA, 2011)Los Chiles es el segundo cantón más pequeño de la Región Huetar Norte de Costa Rica, con una extensión de 1359 Km. cuadrados y una población que asciende a 22190 habitantes. Es una zona eminentemente rural en donde la ... -
China y la geoestrategia de Estados Unidos en el siglo XXI
(Universidad Nacional, Costa Rica, 2012)Se explican los cálculos geoestrategicos elaborados por Estados Unidos y sus aliados, quienes recurren al "poder inteligente", a fin de preservar la hegemonía estadounidense y los valores occidentales en la arena internacional -
Los chinos en la sociedad costarricense
(Centro de Estudios Generales, Universidad Nacional, Costa Rica, 1995-01)La adaptación de grupos étnicos a entornos culturales disímiles siempre constituye una dolorosa experiencia tanto para el que se inserta como para la sociedad que los recibe. Los chinos llegaron en 1872 a desafiar con su ... -
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 ... -
Chirripó Hydrological Research Site: advancing stable isotope hydrology in the Central American Páramo
(2020-01-25)The Chirripó Hydrological Research Site (CHRS) is located within the Chirripó National Park, Costa Rica (between 3,100-3,820 m asl) whereby ~100 km2 are covered by Páramo, a high‐elevation tropical grassland ecosystem. A ... -
Chirripó Savegre: Corredor Biológico Premontano
(Universidad Nacional, Costa Rica, 2022)Nuestro corredor biológico nace en el año 2014 cuando se realiza un estudio de perfil técnico. Desde su fundación, esta iniciativa ha cimentado sus esfuerzos en estrategias de desarrollo sostenible para sus comunidades, ... -
El chiste de la alteridad : [artículo de revista] la pesadilla de ser el otro /
(Costa Rica : Editorial UCR, 2007, 2012-11-09) -
Chlamydia abortus in dairy farms in Costa Rica
(Universidad Nacional, Costa Rica, 2015-12-02)The aim of the present study was to determine the presence of antibodies against Chlamydia abortus in specialized dairy farms. A total of 608 blood samples were collected during 2012 from 24 dairy farms located in the ... -
Chlamydia psittaci
(Universidad Nacional, Costa Rica, 2020)El objetivo de este vídeo es presentar una breve explicación sobre la bacteria Chlamydia psittaci presente en aves, su forma de transmisión a humanos, presencia en Costa Rica, diagnóstico y las medidas de prevención. El ... -
Chlamydia psittaci genotype B in a pigeon (Columba livia) inhabiting a public place in San José, Costa Rica
(University of Tripoli, 2013-12-02)Human chlamydiosis is a zoonotic disease of avian origin caused by Chlamydia psittaci. The highest infection rates have been detected in parrots (Psittacidae) and pigeons (Columbiformes), the latter most frequently carry ... -
Chlamydophila abortus en ganado lechero de la zona norte de Heredia y Alajuela, Costa Rica
(Universidad Nacional, Costa Rica, 2014-02-13)Establece la presencia de Chlaydophila abortus en las fincas lecheras de la zona norte de Heredia y Alajuela mediante la determinación de anticuerpos. Se analizaron sueros de bovinos especializados en producción de leche, ... -
Chlorine isotope and Cl–Br fractionation in fluids of Poás volcano (Costa Rica): Insight into an active volcanic–hydrothermal system
(Elsevier, 2016-10-01)Halogen-rich volcanic fluids issued at the surface carry information on properties and processes operating in shallow hydrothermal systems. This paper reports a long-term record of Cl–Br concentrations and δ37Cl signatures ... -
Chlorine isotope variations in the hyper-acid lake system of Poás volcano, Costa Rica
(International Association of Volcanology and Chemistry of the Earth's Interior, 2013-07)This study provides some datasets of the most salient geochemical signatures of the acid lake and their strongly uctuating behaviour observed over the last 30 years. -
Chlorophyll fluorescence and biomass partitioning within light and nitrogen deficiency: An example of the use of the R programming language for teaching
(Universidad Estatal a Distancia (UNED) (Costa Rica), 2020)Introduction: Chlorophyll Fluorescence (Fv/Fm) detects damage in photosystem II (PSII) in plants exposed to stress (biotic and/or abiotic). Objective: In this context, Fv/Fm for the diagnosis of the effect of N deficiency ... -
Chromobacterium violaceum infection in a free ranging howler monkey in Costa Rica
(Wildlife Disease Association, 2010)Chromobacterium violaceum is a gram-negative saprobe bacterium that is a rare opportunistic pathogen in mammals. There are numerous reports in humans including fatalities, but no record exists in free-ranging nonhuman ... -
Chromogenic, Biochemical and Proteomic Identification of Yeast and Yeast-like Microorganisms Isolated from Clinical Samples from Animals of Costa Rica
(MDPI, 2024-03-16)Yeast infections are challenging human and animal medicine due to low rates of detection and the emergence of unknown ecology isolates. The aim of this study was to verify the biochemical identification of yeasts and ... -
Chromosome-Level Genome Reveals the Origin of Neo-Y Chromosome in the Male Barred Knifejaw Oplegnathus fasciatus
(Elsevier Inc., 2020-04-24)The barred knifejaw, Oplegnathus fasciatus, is characterized by an X1X2Y system with a neo-Y chromosome for males. Here, a chromosome-level genome was assembled to investigate the origin of neo-Y chromosome to the male O. ... -
Chromosome-Level Genome Reveals the Origin of Neo-Y Chromosome in the Male Barred Knifejaw Oplegnathus fasciatus
(Universidad Nacional (Costa Rica), 2020-04-24)The barred knifejaw, Oplegnathus fasciatus, is characterized by an X1X2Y system with a neo-Y chromosome for males. Here, a chromosome-level genome was assembled to investigate the origin of neo-Y chromosome to the male O. ...