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    • Checklist of the vascular flora of Reserva Biológica San Luis, Costa Rica 

      Jiménez-Alfaro, Esteban José; Juárez, Pedro; Díaz, Armando (Pensoft, 2016-03-21)
      The Reserva Biológica San Luis is a small protected area located on the Pacific side of the Cordillera de Tilarán, northwestern Costa Rica, with a forest transitioning between the basal and premontane floras according to ...

    • Chemical And Extractives Compatibility Of Empty Bunch Fruit Of Elaeis Guineensis, Leaves Of Ananas Cumosos And Tetrapak With Wood Used In Particleboards In Tropical Areas 

      Moya, R.; Camacho, D.; Soto, R.; Mata Segreda, J.F.; Jose-Roberto, Vega-Baudrit (Universidad Nacional del Sur (UNS), 2015)
      Tropical countries produce a great variety of lignocellulosic residues from small-area planted crops. Large amount of "Tetra Pak" package are also produced without any disposal treatment. In order to give solutions for ...

    • Chemical and functional characterization of antimicrobial metabolites isolated from ascidian Rhopalaea Birkelandi 

      Cordero, Maribel; Borbón, Henry; Román, Félix R.; Morrel, Luis; Víquez, Rigoberto; Villegas, Luis R.; Soto, Roy; Vega, Ileana (Universidad Nacional (Costa Rica), 2011-12)
      Marine ecosystems have a very large diversity of resources, most of them still partially unknown, and a few others exploited for development of new industrial and toxicological products. The objective of this investigation ...

    • Chemical characterization of filterable PM2.5 emissions generated from regulated stationary sources in the Metropolitan Area of Costa Rica 

      Herrera-Murillo, Jorge; Rojas Marín, José Félix; Mugica-Alvarez, Violeta; Solórzano Arias, David; Beita Guerrero, Víctor Hugo (Elsevier, 2017-01-14)
      Filterable PM2.5 concentrations and their chemical characterizations were analyzed for 67 boilers and 25 indirect furnaces located in the Metropolitan Area of Costa Rica from February 2014 to November 2015. The PM2.5 samples ...

    • Chemical composition of PM 2.5 particles in Salamanca, Guanajuato Mexico: Source apportionment with receptor models 

      Herrera-Murillo, Jorge; Campos Ramos, Arturo; Ángeles García, Felipe; Blanco Jiménez, Salvador; Cárdenas, Beatriz; Mizohata, Akira (Science Direct, 2012-04)
      The National Institute of Ecology, through Management General for Environmental Research and Training (DGCENICA) carried out a sampling campaign where a total of 21 elements were determined in 140PM 2.5 samples from one ...

    • Chemical constituents from Zanthoxylum setulosum (Rutaceae) 

      Castro, Víctor; Poveda, Luis; Chavarria, Max; Mora Vasquez, Soledad; Murillo, Renato (Universidad Nacional, Costa Rica, 2011-02-10)
      Following our phytochemical studies of Costa Rican plants, in this work we report the isolation and identification of eight compounds from aerial parts of Zanthoxylum setulosum (Rutaceae). They were identified as the ...

    • Chemical tradeoffs in seed dispersal: defensive metabolites in fruits deter consumption by mutualist bats 

      Whitehead, Susan; OBANDO, MARIA; BOWERS, M (Oikos, 2015-09-08)
      Although fleshy fruits function primarily to attract seed dispersers, many animal‐dispersed fruits contain potentially toxic secondary metabolites. These metabolites can provide defense against seed predators and pathogens, ...

    • Chiapas y la independencia centroamericana 

      Sandí Morales, Jose Aurelio (Universidad Nacional, Costa Rica, 2019-09)
      Explica las causas por las cuales tras la independencia del Reino de Guatemala, la región de Chiapas decidió terminar su relación política con dicho país, y anexarse a México, tras su reciente independencia de España, entre ...

    • Child Soldiers in Colombia 

      Linnet, Áshildur (Universidad Nacional, Costa Rica, 2004)
      Esta investigación es el proyecto final de la Maestría en Educación en Derechos Humanos y para la Paz de la Universidad Nacional de Costa Rica. Se trata de la participación infantil en el conflicto armado en Colombia ...

    • Childhood leukaemia in Costa Rica, 1981-96 

      Monge, Patricia; Wesseling, Catharina; Rodríguez, Ana Cecilia; Cantor, Kenneth P; Weiderpass, Elisabete; Reutfors, Johan; Ahlbom, Anders; Partanen, Timo (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. 

      Miranda Vargas, María del Rocío (2012-11-09)

    • Los Chiles, Costa Rica 

      IDESPO (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 

      Rodríguez Hölkemeyer, Patricia (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 

      Fonseca Herrera, Zaida (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 

      Esquivel-Hernández, Germain; Sanchez-Murillo, Ricardo; Vargas Salazar, Enzo (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 

      Esquivel-Hernandez, Germain; Sánchez Murillo, Ricardo; Vargas Salazar, Enzo (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 

      Arias Navarro, Adrián; Madrigal Villanueva, Erick; Vargas Salazar, Enzo; Syed Mora, Shankar (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 / 

      Ramírez Caro, Jorge (Costa Rica : Editorial UCR, 2007, 2012-11-09)

    • Chlamydia abortus in dairy farms in Costa Rica 

      Dolz, Gaby; Fonseca Salazar, Lisa; Murillo Herrera, Jaime; Romero-Zúñiga, Juan José (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 

      Gazel Carrión, Natasha (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 ...